From 3a1d97f556bc4c5384799ac121640984b590c05c Mon Sep 17 00:00:00 2001 From: Thomas Date: Sun, 15 Aug 2021 10:03:09 +0200 Subject: Updated to raylib 3.7 --- libs/raylib/src/external/dr_flac.h | 12482 ++++++++++++++++++++++------------- 1 file changed, 7906 insertions(+), 4576 deletions(-) (limited to 'libs/raylib/src/external/dr_flac.h') diff --git a/libs/raylib/src/external/dr_flac.h b/libs/raylib/src/external/dr_flac.h index 250d0bd..a797350 100644 --- a/libs/raylib/src/external/dr_flac.h +++ b/libs/raylib/src/external/dr_flac.h @@ -1,148 +1,305 @@ /* FLAC audio decoder. Choice of public domain or MIT-0. See license statements at the end of this file. -dr_flac - v0.11.10 - 2019-06-26 +dr_flac - v0.12.29 - 2021-04-02 David Reid - mackron@gmail.com + +GitHub: https://github.com/mackron/dr_libs */ /* -USAGE -===== -dr_flac is a single-file library. To use it, do something like the following in one .c file. +RELEASE NOTES - v0.12.0 +======================= +Version 0.12.0 has breaking API changes including changes to the existing API and the removal of deprecated APIs. + + +Improved Client-Defined Memory Allocation +----------------------------------------- +The main change with this release is the addition of a more flexible way of implementing custom memory allocation routines. The +existing system of DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE are still in place and will be used by default when no custom +allocation callbacks are specified. + +To use the new system, you pass in a pointer to a drflac_allocation_callbacks object to drflac_open() and family, like this: + + void* my_malloc(size_t sz, void* pUserData) + { + return malloc(sz); + } + void* my_realloc(void* p, size_t sz, void* pUserData) + { + return realloc(p, sz); + } + void my_free(void* p, void* pUserData) + { + free(p); + } + + ... + + drflac_allocation_callbacks allocationCallbacks; + allocationCallbacks.pUserData = &myData; + allocationCallbacks.onMalloc = my_malloc; + allocationCallbacks.onRealloc = my_realloc; + allocationCallbacks.onFree = my_free; + drflac* pFlac = drflac_open_file("my_file.flac", &allocationCallbacks); + +The advantage of this new system is that it allows you to specify user data which will be passed in to the allocation routines. + +Passing in null for the allocation callbacks object will cause dr_flac to use defaults which is the same as DRFLAC_MALLOC, +DRFLAC_REALLOC and DRFLAC_FREE and the equivalent of how it worked in previous versions. + +Every API that opens a drflac object now takes this extra parameter. These include the following: + + drflac_open() + drflac_open_relaxed() + drflac_open_with_metadata() + drflac_open_with_metadata_relaxed() + drflac_open_file() + drflac_open_file_with_metadata() + drflac_open_memory() + drflac_open_memory_with_metadata() + drflac_open_and_read_pcm_frames_s32() + drflac_open_and_read_pcm_frames_s16() + drflac_open_and_read_pcm_frames_f32() + drflac_open_file_and_read_pcm_frames_s32() + drflac_open_file_and_read_pcm_frames_s16() + drflac_open_file_and_read_pcm_frames_f32() + drflac_open_memory_and_read_pcm_frames_s32() + drflac_open_memory_and_read_pcm_frames_s16() + drflac_open_memory_and_read_pcm_frames_f32() + + + +Optimizations +------------- +Seeking performance has been greatly improved. A new binary search based seeking algorithm has been introduced which significantly +improves performance over the brute force method which was used when no seek table was present. Seek table based seeking also takes +advantage of the new binary search seeking system to further improve performance there as well. Note that this depends on CRC which +means it will be disabled when DR_FLAC_NO_CRC is used. + +The SSE4.1 pipeline has been cleaned up and optimized. You should see some improvements with decoding speed of 24-bit files in +particular. 16-bit streams should also see some improvement. + +drflac_read_pcm_frames_s16() has been optimized. Previously this sat on top of drflac_read_pcm_frames_s32() and performed it's s32 +to s16 conversion in a second pass. This is now all done in a single pass. This includes SSE2 and ARM NEON optimized paths. + +A minor optimization has been implemented for drflac_read_pcm_frames_s32(). This will now use an SSE2 optimized pipeline for stereo +channel reconstruction which is the last part of the decoding process. + +The ARM build has seen a few improvements. The CLZ (count leading zeroes) and REV (byte swap) instructions are now used when +compiling with GCC and Clang which is achieved using inline assembly. The CLZ instruction requires ARM architecture version 5 at +compile time and the REV instruction requires ARM architecture version 6. + +An ARM NEON optimized pipeline has been implemented. To enable this you'll need to add -mfpu=neon to the command line when compiling. + + +Removed APIs +------------ +The following APIs were deprecated in version 0.11.0 and have been completely removed in version 0.12.0: + + drflac_read_s32() -> drflac_read_pcm_frames_s32() + drflac_read_s16() -> drflac_read_pcm_frames_s16() + drflac_read_f32() -> drflac_read_pcm_frames_f32() + drflac_seek_to_sample() -> drflac_seek_to_pcm_frame() + drflac_open_and_decode_s32() -> drflac_open_and_read_pcm_frames_s32() + drflac_open_and_decode_s16() -> drflac_open_and_read_pcm_frames_s16() + drflac_open_and_decode_f32() -> drflac_open_and_read_pcm_frames_f32() + drflac_open_and_decode_file_s32() -> drflac_open_file_and_read_pcm_frames_s32() + drflac_open_and_decode_file_s16() -> drflac_open_file_and_read_pcm_frames_s16() + drflac_open_and_decode_file_f32() -> drflac_open_file_and_read_pcm_frames_f32() + drflac_open_and_decode_memory_s32() -> drflac_open_memory_and_read_pcm_frames_s32() + drflac_open_and_decode_memory_s16() -> drflac_open_memory_and_read_pcm_frames_s16() + drflac_open_and_decode_memory_f32() -> drflac_open_memroy_and_read_pcm_frames_f32() + +Prior versions of dr_flac operated on a per-sample basis whereas now it operates on PCM frames. The removed APIs all relate +to the old per-sample APIs. You now need to use the "pcm_frame" versions. +*/ + + +/* +Introduction +============ +dr_flac is a single file library. To use it, do something like the following in one .c file. + + ```c #define DR_FLAC_IMPLEMENTATION #include "dr_flac.h" + ``` -You can then #include this file in other parts of the program as you would with any other header file. To decode audio data, -do something like the following: +You can then #include this file in other parts of the program as you would with any other header file. To decode audio data, do something like the following: - drflac* pFlac = drflac_open_file("MySong.flac"); + ```c + drflac* pFlac = drflac_open_file("MySong.flac", NULL); if (pFlac == NULL) { // Failed to open FLAC file } drflac_int32* pSamples = malloc(pFlac->totalPCMFrameCount * pFlac->channels * sizeof(drflac_int32)); drflac_uint64 numberOfInterleavedSamplesActuallyRead = drflac_read_pcm_frames_s32(pFlac, pFlac->totalPCMFrameCount, pSamples); + ``` -The drflac object represents the decoder. It is a transparent type so all the information you need, such as the number of -channels and the bits per sample, should be directly accessible - just make sure you don't change their values. Samples are -always output as interleaved signed 32-bit PCM. In the example above a native FLAC stream was opened, however dr_flac has -seamless support for Ogg encapsulated FLAC streams as well. +The drflac object represents the decoder. It is a transparent type so all the information you need, such as the number of channels and the bits per sample, +should be directly accessible - just make sure you don't change their values. Samples are always output as interleaved signed 32-bit PCM. In the example above +a native FLAC stream was opened, however dr_flac has seamless support for Ogg encapsulated FLAC streams as well. -You do not need to decode the entire stream in one go - you just specify how many samples you'd like at any given time and -the decoder will give you as many samples as it can, up to the amount requested. Later on when you need the next batch of -samples, just call it again. Example: +You do not need to decode the entire stream in one go - you just specify how many samples you'd like at any given time and the decoder will give you as many +samples as it can, up to the amount requested. Later on when you need the next batch of samples, just call it again. Example: + ```c while (drflac_read_pcm_frames_s32(pFlac, chunkSizeInPCMFrames, pChunkSamples) > 0) { do_something(); } + ``` -You can seek to a specific sample with drflac_seek_to_sample(). The given sample is based on interleaving. So for example, -if you were to seek to the sample at index 0 in a stereo stream, you'll be seeking to the first sample of the left channel. -The sample at index 1 will be the first sample of the right channel. The sample at index 2 will be the second sample of the -left channel, etc. - +You can seek to a specific PCM frame with `drflac_seek_to_pcm_frame()`. If you just want to quickly decode an entire FLAC file in one go you can do something like this: + ```c unsigned int channels; unsigned int sampleRate; drflac_uint64 totalPCMFrameCount; - drflac_int32* pSampleData = drflac_open_file_and_read_pcm_frames_s32("MySong.flac", &channels, &sampleRate, &totalPCMFrameCount); + drflac_int32* pSampleData = drflac_open_file_and_read_pcm_frames_s32("MySong.flac", &channels, &sampleRate, &totalPCMFrameCount, NULL); if (pSampleData == NULL) { // Failed to open and decode FLAC file. } ... - drflac_free(pSampleData); - - -You can read samples as signed 16-bit integer and 32-bit floating-point PCM with the *_s16() and *_f32() family of APIs -respectively, but note that these should be considered lossy. - + drflac_free(pSampleData, NULL); + ``` -If you need access to metadata (album art, etc.), use drflac_open_with_metadata(), drflac_open_file_with_metdata() or -drflac_open_memory_with_metadata(). The rationale for keeping these APIs separate is that they're slightly slower than the -normal versions and also just a little bit harder to use. +You can read samples as signed 16-bit integer and 32-bit floating-point PCM with the *_s16() and *_f32() family of APIs respectively, but note that these +should be considered lossy. -dr_flac reports metadata to the application through the use of a callback, and every metadata block is reported before -drflac_open_with_metdata() returns. +If you need access to metadata (album art, etc.), use `drflac_open_with_metadata()`, `drflac_open_file_with_metdata()` or `drflac_open_memory_with_metadata()`. +The rationale for keeping these APIs separate is that they're slightly slower than the normal versions and also just a little bit harder to use. dr_flac +reports metadata to the application through the use of a callback, and every metadata block is reported before `drflac_open_with_metdata()` returns. -The main opening APIs (drflac_open(), etc.) will fail if the header is not present. The presents a problem in certain -scenarios such as broadcast style streams like internet radio where the header may not be present because the user has -started playback mid-stream. To handle this, use the relaxed APIs: drflac_open_relaxed() and drflac_open_with_metadata_relaxed(). +The main opening APIs (`drflac_open()`, etc.) will fail if the header is not present. The presents a problem in certain scenarios such as broadcast style +streams or internet radio where the header may not be present because the user has started playback mid-stream. To handle this, use the relaxed APIs: + + `drflac_open_relaxed()` + `drflac_open_with_metadata_relaxed()` -It is not recommended to use these APIs for file based streams because a missing header would usually indicate a -corrupted or perverse file. In addition, these APIs can take a long time to initialize because they may need to spend -a lot of time finding the first frame. +It is not recommended to use these APIs for file based streams because a missing header would usually indicate a corrupt or perverse file. In addition, these +APIs can take a long time to initialize because they may need to spend a lot of time finding the first frame. -OPTIONS -======= +Build Options +============= #define these options before including this file. #define DR_FLAC_NO_STDIO - Disable drflac_open_file() and family. + Disable `drflac_open_file()` and family. #define DR_FLAC_NO_OGG Disables support for Ogg/FLAC streams. #define DR_FLAC_BUFFER_SIZE - Defines the size of the internal buffer to store data from onRead(). This buffer is used to reduce the number of calls - back to the client for more data. Larger values means more memory, but better performance. My tests show diminishing - returns after about 4KB (which is the default). Consider reducing this if you have a very efficient implementation of - onRead(), or increase it if it's very inefficient. Must be a multiple of 8. + Defines the size of the internal buffer to store data from onRead(). This buffer is used to reduce the number of calls back to the client for more data. + Larger values means more memory, but better performance. My tests show diminishing returns after about 4KB (which is the default). Consider reducing this if + you have a very efficient implementation of onRead(), or increase it if it's very inefficient. Must be a multiple of 8. #define DR_FLAC_NO_CRC - Disables CRC checks. This will offer a performance boost when CRC is unnecessary. + Disables CRC checks. This will offer a performance boost when CRC is unnecessary. This will disable binary search seeking. When seeking, the seek table will + be used if available. Otherwise the seek will be performed using brute force. #define DR_FLAC_NO_SIMD - Disables SIMD optimizations (SSE on x86/x64 architectures). Use this if you are having compatibility issues with your - compiler. + Disables SIMD optimizations (SSE on x86/x64 architectures, NEON on ARM architectures). Use this if you are having compatibility issues with your compiler. -QUICK NOTES -=========== -- dr_flac does not currently support changing the sample rate nor channel count mid stream. -- Audio data is output as signed 32-bit PCM, regardless of the bits per sample the FLAC stream is encoded as. -- This has not been tested on big-endian architectures. +Notes +===== +- dr_flac does not support changing the sample rate nor channel count mid stream. - dr_flac is not thread-safe, but its APIs can be called from any thread so long as you do your own synchronization. -- When using Ogg encapsulation, a corrupted metadata block will result in drflac_open_with_metadata() and drflac_open() - returning inconsistent samples. +- When using Ogg encapsulation, a corrupted metadata block will result in `drflac_open_with_metadata()` and `drflac_open()` returning inconsistent samples due + to differences in corrupted stream recorvery logic between the two APIs. */ #ifndef dr_flac_h #define dr_flac_h -#include - -#if defined(_MSC_VER) && _MSC_VER < 1600 -typedef signed char drflac_int8; -typedef unsigned char drflac_uint8; -typedef signed short drflac_int16; -typedef unsigned short drflac_uint16; -typedef signed int drflac_int32; -typedef unsigned int drflac_uint32; -typedef signed __int64 drflac_int64; -typedef unsigned __int64 drflac_uint64; +#ifdef __cplusplus +extern "C" { +#endif + +#define DRFLAC_STRINGIFY(x) #x +#define DRFLAC_XSTRINGIFY(x) DRFLAC_STRINGIFY(x) + +#define DRFLAC_VERSION_MAJOR 0 +#define DRFLAC_VERSION_MINOR 12 +#define DRFLAC_VERSION_REVISION 29 +#define DRFLAC_VERSION_STRING DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MAJOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MINOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_REVISION) + +#include /* For size_t. */ + +/* Sized types. */ +typedef signed char drflac_int8; +typedef unsigned char drflac_uint8; +typedef signed short drflac_int16; +typedef unsigned short drflac_uint16; +typedef signed int drflac_int32; +typedef unsigned int drflac_uint32; +#if defined(_MSC_VER) + typedef signed __int64 drflac_int64; + typedef unsigned __int64 drflac_uint64; +#else + #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wlong-long" + #if defined(__clang__) + #pragma GCC diagnostic ignored "-Wc++11-long-long" + #endif + #endif + typedef signed long long drflac_int64; + typedef unsigned long long drflac_uint64; + #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) + #pragma GCC diagnostic pop + #endif +#endif +#if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__)) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__) + typedef drflac_uint64 drflac_uintptr; #else -#include -typedef int8_t drflac_int8; -typedef uint8_t drflac_uint8; -typedef int16_t drflac_int16; -typedef uint16_t drflac_uint16; -typedef int32_t drflac_int32; -typedef uint32_t drflac_uint32; -typedef int64_t drflac_int64; -typedef uint64_t drflac_uint64; -#endif -typedef drflac_uint8 drflac_bool8; -typedef drflac_uint32 drflac_bool32; -#define DRFLAC_TRUE 1 -#define DRFLAC_FALSE 0 + typedef drflac_uint32 drflac_uintptr; +#endif +typedef drflac_uint8 drflac_bool8; +typedef drflac_uint32 drflac_bool32; +#define DRFLAC_TRUE 1 +#define DRFLAC_FALSE 0 + +#if !defined(DRFLAC_API) + #if defined(DRFLAC_DLL) + #if defined(_WIN32) + #define DRFLAC_DLL_IMPORT __declspec(dllimport) + #define DRFLAC_DLL_EXPORT __declspec(dllexport) + #define DRFLAC_DLL_PRIVATE static + #else + #if defined(__GNUC__) && __GNUC__ >= 4 + #define DRFLAC_DLL_IMPORT __attribute__((visibility("default"))) + #define DRFLAC_DLL_EXPORT __attribute__((visibility("default"))) + #define DRFLAC_DLL_PRIVATE __attribute__((visibility("hidden"))) + #else + #define DRFLAC_DLL_IMPORT + #define DRFLAC_DLL_EXPORT + #define DRFLAC_DLL_PRIVATE static + #endif + #endif + + #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) + #define DRFLAC_API DRFLAC_DLL_EXPORT + #else + #define DRFLAC_API DRFLAC_DLL_IMPORT + #endif + #define DRFLAC_PRIVATE DRFLAC_DLL_PRIVATE + #else + #define DRFLAC_API extern + #define DRFLAC_PRIVATE static + #endif +#endif #if defined(_MSC_VER) && _MSC_VER >= 1700 /* Visual Studio 2012 */ #define DRFLAC_DEPRECATED __declspec(deprecated) @@ -158,19 +315,17 @@ typedef drflac_uint32 drflac_bool32; #define DRFLAC_DEPRECATED #endif +DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision); +DRFLAC_API const char* drflac_version_string(void); + /* -As data is read from the client it is placed into an internal buffer for fast access. This controls the -size of that buffer. Larger values means more speed, but also more memory. In my testing there is diminishing -returns after about 4KB, but you can fiddle with this to suit your own needs. Must be a multiple of 8. +As data is read from the client it is placed into an internal buffer for fast access. This controls the size of that buffer. Larger values means more speed, +but also more memory. In my testing there is diminishing returns after about 4KB, but you can fiddle with this to suit your own needs. Must be a multiple of 8. */ #ifndef DR_FLAC_BUFFER_SIZE #define DR_FLAC_BUFFER_SIZE 4096 #endif -#ifdef __cplusplus -extern "C" { -#endif - /* Check if we can enable 64-bit optimizations. */ #if defined(_WIN64) || defined(_LP64) || defined(__LP64__) #define DRFLAC_64BIT @@ -232,28 +387,31 @@ typedef enum #pragma pack(2) typedef struct { - drflac_uint64 firstSample; - drflac_uint64 frameOffset; /* The offset from the first byte of the header of the first frame. */ - drflac_uint16 sampleCount; + drflac_uint64 firstPCMFrame; + drflac_uint64 flacFrameOffset; /* The offset from the first byte of the header of the first frame. */ + drflac_uint16 pcmFrameCount; } drflac_seekpoint; #pragma pack() typedef struct { - drflac_uint16 minBlockSize; - drflac_uint16 maxBlockSize; - drflac_uint32 minFrameSize; - drflac_uint32 maxFrameSize; + drflac_uint16 minBlockSizeInPCMFrames; + drflac_uint16 maxBlockSizeInPCMFrames; + drflac_uint32 minFrameSizeInPCMFrames; + drflac_uint32 maxFrameSizeInPCMFrames; drflac_uint32 sampleRate; drflac_uint8 channels; drflac_uint8 bitsPerSample; - drflac_uint64 totalSampleCount; + drflac_uint64 totalPCMFrameCount; drflac_uint8 md5[16]; } drflac_streaminfo; typedef struct { - /* The metadata type. Use this to know how to interpret the data below. */ + /* + The metadata type. Use this to know how to interpret the data below. Will be set to one of the + DRFLAC_METADATA_BLOCK_TYPE_* tokens. + */ drflac_uint32 type; /* @@ -326,42 +484,91 @@ typedef struct /* Callback for when data needs to be read from the client. -pUserData [in] The user data that was passed to drflac_open() and family. -pBufferOut [out] The output buffer. -bytesToRead [in] The number of bytes to read. -Returns the number of bytes actually read. +Parameters +---------- +pUserData (in) + The user data that was passed to drflac_open() and family. + +pBufferOut (out) + The output buffer. + +bytesToRead (in) + The number of bytes to read. + -A return value of less than bytesToRead indicates the end of the stream. Do _not_ return from this callback until -either the entire bytesToRead is filled or you have reached the end of the stream. +Return Value +------------ +The number of bytes actually read. + + +Remarks +------- +A return value of less than bytesToRead indicates the end of the stream. Do _not_ return from this callback until either the entire bytesToRead is filled or +you have reached the end of the stream. */ typedef size_t (* drflac_read_proc)(void* pUserData, void* pBufferOut, size_t bytesToRead); /* Callback for when data needs to be seeked. -pUserData [in] The user data that was passed to drflac_open() and family. -offset [in] The number of bytes to move, relative to the origin. Will never be negative. -origin [in] The origin of the seek - the current position or the start of the stream. -Returns whether or not the seek was successful. +Parameters +---------- +pUserData (in) + The user data that was passed to drflac_open() and family. + +offset (in) + The number of bytes to move, relative to the origin. Will never be negative. + +origin (in) + The origin of the seek - the current position or the start of the stream. -The offset will never be negative. Whether or not it is relative to the beginning or current position is determined -by the "origin" parameter which will be either drflac_seek_origin_start or drflac_seek_origin_current. + +Return Value +------------ +Whether or not the seek was successful. + + +Remarks +------- +The offset will never be negative. Whether or not it is relative to the beginning or current position is determined by the "origin" parameter which will be +either drflac_seek_origin_start or drflac_seek_origin_current. + +When seeking to a PCM frame using drflac_seek_to_pcm_frame(), dr_flac may call this with an offset beyond the end of the FLAC stream. This needs to be detected +and handled by returning DRFLAC_FALSE. */ typedef drflac_bool32 (* drflac_seek_proc)(void* pUserData, int offset, drflac_seek_origin origin); /* Callback for when a metadata block is read. -pUserData [in] The user data that was passed to drflac_open() and family. -pMetadata [in] A pointer to a structure containing the data of the metadata block. -Use pMetadata->type to determine which metadata block is being handled and how to read the data. +Parameters +---------- +pUserData (in) + The user data that was passed to drflac_open() and family. + +pMetadata (in) + A pointer to a structure containing the data of the metadata block. + + +Remarks +------- +Use pMetadata->type to determine which metadata block is being handled and how to read the data. This +will be set to one of the DRFLAC_METADATA_BLOCK_TYPE_* tokens. */ typedef void (* drflac_meta_proc)(void* pUserData, drflac_metadata* pMetadata); +typedef struct +{ + void* pUserData; + void* (* onMalloc)(size_t sz, void* pUserData); + void* (* onRealloc)(void* p, size_t sz, void* pUserData); + void (* onFree)(void* p, void* pUserData); +} drflac_allocation_callbacks; + /* Structure for internal use. Only used for decoders opened with drflac_open_memory. */ typedef struct { @@ -426,35 +633,29 @@ typedef struct /* The order to use for the prediction stage for SUBFRAME_FIXED and SUBFRAME_LPC. */ drflac_uint8 lpcOrder; - /* - The number of bits per sample for this subframe. This is not always equal to the current frame's bit per sample because - an extra bit is required for side channels when interchannel decorrelation is being used. - */ - drflac_uint32 bitsPerSample; - - /* - A pointer to the buffer containing the decoded samples in the subframe. This pointer is an offset from drflac::pExtraData. Note that - it's a signed 32-bit integer for each value. - */ - drflac_int32* pDecodedSamples; + /* A pointer to the buffer containing the decoded samples in the subframe. This pointer is an offset from drflac::pExtraData. */ + drflac_int32* pSamplesS32; } drflac_subframe; typedef struct { /* - If the stream uses variable block sizes, this will be set to the index of the first sample. If fixed block sizes are used, this will - always be set to 0. + If the stream uses variable block sizes, this will be set to the index of the first PCM frame. If fixed block sizes are used, this will + always be set to 0. This is 64-bit because the decoded PCM frame number will be 36 bits. */ - drflac_uint64 sampleNumber; + drflac_uint64 pcmFrameNumber; - /* If the stream uses fixed block sizes, this will be set to the frame number. If variable block sizes are used, this will always be 0. */ - drflac_uint32 frameNumber; + /* + If the stream uses fixed block sizes, this will be set to the frame number. If variable block sizes are used, this will always be 0. This + is 32-bit because in fixed block sizes, the maximum frame number will be 31 bits. + */ + drflac_uint32 flacFrameNumber; /* The sample rate of this frame. */ drflac_uint32 sampleRate; - /* The number of samples in each sub-frame within this frame. */ - drflac_uint16 blockSize; + /* The number of PCM frames in each sub-frame within this frame. */ + drflac_uint16 blockSizeInPCMFrames; /* The channel assignment of this frame. This is not always set to the channel count. If interchannel decorrelation is being used this @@ -475,10 +676,10 @@ typedef struct drflac_frame_header header; /* - The number of samples left to be read in this frame. This is initially set to the block size multiplied by the channel count. As samples - are read, this will be decremented. When it reaches 0, the decoder will see this frame as fully consumed and load the next frame. + The number of PCM frames left to be read in this FLAC frame. This is initially set to the block size. As PCM frames are read, + this will be decremented. When it reaches 0, the decoder will see this frame as fully consumed and load the next frame. */ - drflac_uint32 samplesRemaining; + drflac_uint32 pcmFramesRemaining; /* The list of sub-frames within the frame. There is one sub-frame for each channel, and there's a maximum of 8 channels. */ drflac_subframe subframes[8]; @@ -492,6 +693,9 @@ typedef struct /* The user data posted to the metadata callback function. */ void* pUserDataMD; + /* Memory allocation callbacks. */ + drflac_allocation_callbacks allocationCallbacks; + /* The sample rate. Will be set to something like 44100. */ drflac_uint32 sampleRate; @@ -506,15 +710,13 @@ typedef struct drflac_uint8 bitsPerSample; /* The maximum block size, in samples. This number represents the number of samples in each channel (not combined). */ - drflac_uint16 maxBlockSize; + drflac_uint16 maxBlockSizeInPCMFrames; /* - The total number of samples making up the stream. This includes every channel. For example, if the stream has 2 channels, - with each channel having a total of 4096, this value will be set to 2*4096 = 8192. Can be 0 in which case it's still a - valid stream, but just means the total sample count is unknown. Likely the case with streams like internet radio. + The total number of PCM Frames making up the stream. Can be 0 in which case it's still a valid stream, but just means + the total PCM frame count is unknown. Likely the case with streams like internet radio. */ - drflac_uint64 totalSampleCount; - drflac_uint64 totalPCMFrameCount; /* <-- Equal to totalSampleCount / channels. */ + drflac_uint64 totalPCMFrameCount; /* The container type. This is set based on whether or not the decoder was opened from a native or Ogg stream. */ @@ -525,13 +727,14 @@ typedef struct /* Information about the frame the decoder is currently sitting on. */ - drflac_frame currentFrame; + drflac_frame currentFLACFrame; - /* The index of the sample the decoder is currently sitting on. This is only used for seeking. */ - drflac_uint64 currentSample; - /* The position of the first frame in the stream. This is only ever used for seeking. */ - drflac_uint64 firstFramePos; + /* The index of the PCM frame the decoder is currently sitting on. This is only used for seeking. */ + drflac_uint64 currentPCMFrame; + + /* The position of the first FLAC frame in the stream. This is only ever used for seeking. */ + drflac_uint64 firstFLACFramePosInBytes; /* A hack to avoid a malloc() when opening a decoder with drflac_open_memory(). */ @@ -547,6 +750,11 @@ typedef struct /* Internal use only. Only used with Ogg containers. Points to a drflac_oggbs object. This is an offset of pExtraData. */ void* _oggbs; + /* Internal use only. Used for profiling and testing different seeking modes. */ + drflac_bool32 _noSeekTableSeek : 1; + drflac_bool32 _noBinarySearchSeek : 1; + drflac_bool32 _noBruteForceSeek : 1; + /* The bit streamer. The raw FLAC data is fed through this object. */ drflac_bs bs; @@ -558,126 +766,294 @@ typedef struct /* Opens a FLAC decoder. -onRead [in] The function to call when data needs to be read from the client. -onSeek [in] The function to call when the read position of the client data needs to move. -pUserData [in, optional] A pointer to application defined data that will be passed to onRead and onSeek. +Parameters +---------- +onRead (in) + The function to call when data needs to be read from the client. + +onSeek (in) + The function to call when the read position of the client data needs to move. + +pUserData (in, optional) + A pointer to application defined data that will be passed to onRead and onSeek. + +pAllocationCallbacks (in, optional) + A pointer to application defined callbacks for managing memory allocations. + + +Return Value +------------ Returns a pointer to an object representing the decoder. -Close the decoder with drflac_close(). -This function will automatically detect whether or not you are attempting to open a native or Ogg encapsulated -FLAC, both of which should work seamlessly without any manual intervention. Ogg encapsulation also works with -multiplexed streams which basically means it can play FLAC encoded audio tracks in videos. +Remarks +------- +Close the decoder with `drflac_close()`. + +`pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. + +This function will automatically detect whether or not you are attempting to open a native or Ogg encapsulated FLAC, both of which should work seamlessly +without any manual intervention. Ogg encapsulation also works with multiplexed streams which basically means it can play FLAC encoded audio tracks in videos. -This is the lowest level function for opening a FLAC stream. You can also use drflac_open_file() and drflac_open_memory() -to open the stream from a file or from a block of memory respectively. +This is the lowest level function for opening a FLAC stream. You can also use `drflac_open_file()` and `drflac_open_memory()` to open the stream from a file or +from a block of memory respectively. -The STREAMINFO block must be present for this to succeed. Use drflac_open_relaxed() to open a FLAC stream where -the header may not be present. +The STREAMINFO block must be present for this to succeed. Use `drflac_open_relaxed()` to open a FLAC stream where the header may not be present. -See also: drflac_open_file(), drflac_open_memory(), drflac_open_with_metadata(), drflac_close() +Use `drflac_open_with_metadata()` if you need access to metadata. + + +Seek Also +--------- +drflac_open_file() +drflac_open_memory() +drflac_open_with_metadata() +drflac_close() */ -drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData); +DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); /* +Opens a FLAC stream with relaxed validation of the header block. + + +Parameters +---------- +onRead (in) + The function to call when data needs to be read from the client. + +onSeek (in) + The function to call when the read position of the client data needs to move. + +container (in) + Whether or not the FLAC stream is encapsulated using standard FLAC encapsulation or Ogg encapsulation. + +pUserData (in, optional) + A pointer to application defined data that will be passed to onRead and onSeek. + +pAllocationCallbacks (in, optional) + A pointer to application defined callbacks for managing memory allocations. + + +Return Value +------------ +A pointer to an object representing the decoder. + + +Remarks +------- The same as drflac_open(), except attempts to open the stream even when a header block is not present. -Because the header is not necessarily available, the caller must explicitly define the container (Native or Ogg). Do -not set this to drflac_container_unknown - that is for internal use only. +Because the header is not necessarily available, the caller must explicitly define the container (Native or Ogg). Do not set this to `drflac_container_unknown` +as that is for internal use only. -Opening in relaxed mode will continue reading data from onRead until it finds a valid frame. If a frame is never -found it will continue forever. To abort, force your onRead callback to return 0, which dr_flac will use as an -indicator that the end of the stream was found. +Opening in relaxed mode will continue reading data from onRead until it finds a valid frame. If a frame is never found it will continue forever. To abort, +force your `onRead` callback to return 0, which dr_flac will use as an indicator that the end of the stream was found. + +Use `drflac_open_with_metadata_relaxed()` if you need access to metadata. */ -drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData); +DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); /* Opens a FLAC decoder and notifies the caller of the metadata chunks (album art, etc.). -onRead [in] The function to call when data needs to be read from the client. -onSeek [in] The function to call when the read position of the client data needs to move. -onMeta [in] The function to call for every metadata block. -pUserData [in, optional] A pointer to application defined data that will be passed to onRead, onSeek and onMeta. -Returns a pointer to an object representing the decoder. +Parameters +---------- +onRead (in) + The function to call when data needs to be read from the client. -Close the decoder with drflac_close(). +onSeek (in) + The function to call when the read position of the client data needs to move. + +onMeta (in) + The function to call for every metadata block. -This is slower than drflac_open(), so avoid this one if you don't need metadata. Internally, this will do a DRFLAC_MALLOC() -and DRFLAC_FREE() for every metadata block except for STREAMINFO and PADDING blocks. +pUserData (in, optional) + A pointer to application defined data that will be passed to onRead, onSeek and onMeta. -The caller is notified of the metadata via the onMeta callback. All metadata blocks will be handled before the function -returns. +pAllocationCallbacks (in, optional) + A pointer to application defined callbacks for managing memory allocations. -The STREAMINFO block must be present for this to succeed. Use drflac_open_with_metadata_relaxed() to open a FLAC -stream where the header may not be present. -Note that this will behave inconsistently with drflac_open() if the stream is an Ogg encapsulated stream and a metadata -block is corrupted. This is due to the way the Ogg stream recovers from corrupted pages. When drflac_open_with_metadata() -is being used, the open routine will try to read the contents of the metadata block, whereas drflac_open() will simply -seek past it (for the sake of efficiency). This inconsistency can result in different samples being returned depending on -whether or not the stream is being opened with metadata. +Return Value +------------ +A pointer to an object representing the decoder. -See also: drflac_open_file_with_metadata(), drflac_open_memory_with_metadata(), drflac_open(), drflac_close() + +Remarks +------- +Close the decoder with `drflac_close()`. + +`pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. + +This is slower than `drflac_open()`, so avoid this one if you don't need metadata. Internally, this will allocate and free memory on the heap for every +metadata block except for STREAMINFO and PADDING blocks. + +The caller is notified of the metadata via the `onMeta` callback. All metadata blocks will be handled before the function returns. This callback takes a +pointer to a `drflac_metadata` object which is a union containing the data of all relevant metadata blocks. Use the `type` member to discriminate against +the different metadata types. + +The STREAMINFO block must be present for this to succeed. Use `drflac_open_with_metadata_relaxed()` to open a FLAC stream where the header may not be present. + +Note that this will behave inconsistently with `drflac_open()` if the stream is an Ogg encapsulated stream and a metadata block is corrupted. This is due to +the way the Ogg stream recovers from corrupted pages. When `drflac_open_with_metadata()` is being used, the open routine will try to read the contents of the +metadata block, whereas `drflac_open()` will simply seek past it (for the sake of efficiency). This inconsistency can result in different samples being +returned depending on whether or not the stream is being opened with metadata. + + +Seek Also +--------- +drflac_open_file_with_metadata() +drflac_open_memory_with_metadata() +drflac_open() +drflac_close() */ -drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData); +DRFLAC_API drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); /* The same as drflac_open_with_metadata(), except attempts to open the stream even when a header block is not present. -See also: drflac_open_with_metadata(), drflac_open_relaxed() +See Also +-------- +drflac_open_with_metadata() +drflac_open_relaxed() */ -drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData); +DRFLAC_API drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); /* Closes the given FLAC decoder. -pFlac [in] The decoder to close. +Parameters +---------- +pFlac (in) + The decoder to close. + + +Remarks +------- This will destroy the decoder object. + + +See Also +-------- +drflac_open() +drflac_open_with_metadata() +drflac_open_file() +drflac_open_file_w() +drflac_open_file_with_metadata() +drflac_open_file_with_metadata_w() +drflac_open_memory() +drflac_open_memory_with_metadata() */ -void drflac_close(drflac* pFlac); +DRFLAC_API void drflac_close(drflac* pFlac); /* Reads sample data from the given FLAC decoder, output as interleaved signed 32-bit PCM. -pFlac [in] The decoder. -framesToRead [in] The number of PCM frames to read. -pBufferOut [out, optional] A pointer to the buffer that will receive the decoded samples. -Returns the number of PCM frames actually read. +Parameters +---------- +pFlac (in) + The decoder. + +framesToRead (in) + The number of PCM frames to read. + +pBufferOut (out, optional) + A pointer to the buffer that will receive the decoded samples. + + +Return Value +------------ +Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. -pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames -seeked. + +Remarks +------- +pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. */ -drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut); +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut); + /* -Same as drflac_read_pcm_frames_s32(), except outputs samples as 16-bit integer PCM rather than 32-bit. +Reads sample data from the given FLAC decoder, output as interleaved signed 16-bit PCM. + + +Parameters +---------- +pFlac (in) + The decoder. + +framesToRead (in) + The number of PCM frames to read. + +pBufferOut (out, optional) + A pointer to the buffer that will receive the decoded samples. + + +Return Value +------------ +Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. + + +Remarks +------- +pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. Note that this is lossy for streams where the bits per sample is larger than 16. */ -drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut); +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut); /* -Same as drflac_read_pcm_frames_s32(), except outputs samples as 32-bit floating-point PCM. +Reads sample data from the given FLAC decoder, output as interleaved 32-bit floating point PCM. + + +Parameters +---------- +pFlac (in) + The decoder. + +framesToRead (in) + The number of PCM frames to read. + +pBufferOut (out, optional) + A pointer to the buffer that will receive the decoded samples. + + +Return Value +------------ +Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. -Note that this should be considered lossy due to the nature of floating point numbers not being able to exactly -represent every possible number. + +Remarks +------- +pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. + +Note that this should be considered lossy due to the nature of floating point numbers not being able to exactly represent every possible number. */ -drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut); +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut); /* Seeks to the PCM frame at the given index. -pFlac [in] The decoder. -pcmFrameIndex [in] The index of the PCM frame to seek to. See notes below. -Returns DRFLAC_TRUE if successful; DRFLAC_FALSE otherwise. +Parameters +---------- +pFlac (in) + The decoder. + +pcmFrameIndex (in) + The index of the PCM frame to seek to. See notes below. + + +Return Value +------------- +`DRFLAC_TRUE` if successful; `DRFLAC_FALSE` otherwise. */ -drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex); +DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex); @@ -685,42 +1061,145 @@ drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameInde /* Opens a FLAC decoder from the file at the given path. -filename [in] The path of the file to open, either absolute or relative to the current directory. -Returns a pointer to an object representing the decoder. +Parameters +---------- +pFileName (in) + The path of the file to open, either absolute or relative to the current directory. + +pAllocationCallbacks (in, optional) + A pointer to application defined callbacks for managing memory allocations. + +Return Value +------------ +A pointer to an object representing the decoder. + + +Remarks +------- Close the decoder with drflac_close(). -This will hold a handle to the file until the decoder is closed with drflac_close(). Some platforms will restrict the -number of files a process can have open at any given time, so keep this mind if you have many decoders open at the -same time. -See also: drflac_open(), drflac_open_file_with_metadata(), drflac_close() +Remarks +------- +This will hold a handle to the file until the decoder is closed with drflac_close(). Some platforms will restrict the number of files a process can have open +at any given time, so keep this mind if you have many decoders open at the same time. + + +See Also +-------- +drflac_open_file_with_metadata() +drflac_open() +drflac_close() */ -drflac* drflac_open_file(const char* filename); +DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); +DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); /* Opens a FLAC decoder from the file at the given path and notifies the caller of the metadata chunks (album art, etc.) + +Parameters +---------- +pFileName (in) + The path of the file to open, either absolute or relative to the current directory. + +pAllocationCallbacks (in, optional) + A pointer to application defined callbacks for managing memory allocations. + +onMeta (in) + The callback to fire for each metadata block. + +pUserData (in) + A pointer to the user data to pass to the metadata callback. + +pAllocationCallbacks (in) + A pointer to application defined callbacks for managing memory allocations. + + +Remarks +------- Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. + + +See Also +-------- +drflac_open_with_metadata() +drflac_open() +drflac_close() */ -drflac* drflac_open_file_with_metadata(const char* filename, drflac_meta_proc onMeta, void* pUserData); +DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); +DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); #endif /* Opens a FLAC decoder from a pre-allocated block of memory -This does not create a copy of the data. It is up to the application to ensure the buffer remains valid for -the lifetime of the decoder. + +Parameters +---------- +pData (in) + A pointer to the raw encoded FLAC data. + +dataSize (in) + The size in bytes of `data`. + +pAllocationCallbacks (in) + A pointer to application defined callbacks for managing memory allocations. + + +Return Value +------------ +A pointer to an object representing the decoder. + + +Remarks +------- +This does not create a copy of the data. It is up to the application to ensure the buffer remains valid for the lifetime of the decoder. + + +See Also +-------- +drflac_open() +drflac_close() */ -drflac* drflac_open_memory(const void* data, size_t dataSize); +DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks); /* Opens a FLAC decoder from a pre-allocated block of memory and notifies the caller of the metadata chunks (album art, etc.) + +Parameters +---------- +pData (in) + A pointer to the raw encoded FLAC data. + +dataSize (in) + The size in bytes of `data`. + +onMeta (in) + The callback to fire for each metadata block. + +pUserData (in) + A pointer to the user data to pass to the metadata callback. + +pAllocationCallbacks (in) + A pointer to application defined callbacks for managing memory allocations. + + +Remarks +------- Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. + + +See Also +------- +drflac_open_with_metadata() +drflac_open() +drflac_close() */ -drflac* drflac_open_memory_with_metadata(const void* data, size_t dataSize, drflac_meta_proc onMeta, void* pUserData); +DRFLAC_API drflac* drflac_open_memory_with_metadata(const void* pData, size_t dataSize, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); @@ -728,43 +1207,50 @@ drflac* drflac_open_memory_with_metadata(const void* data, size_t dataSize, drfl /* Opens a FLAC stream from the given callbacks and fully decodes it in a single operation. The return value is a -pointer to the sample data as interleaved signed 32-bit PCM. The returned data must be freed with DRFLAC_FREE(). +pointer to the sample data as interleaved signed 32-bit PCM. The returned data must be freed with drflac_free(). + +You can pass in custom memory allocation callbacks via the pAllocationCallbacks parameter. This can be NULL in which +case it will use DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. Sometimes a FLAC file won't keep track of the total sample count. In this situation the function will continuously read samples into a dynamically sized buffer on the heap until no samples are left. Do not call this function on a broadcast type of stream (like internet radio streams and whatnot). */ -drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ -drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ -float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); #ifndef DR_FLAC_NO_STDIO /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a file. */ -drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ -drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ -float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); #endif /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a block of memory. */ -drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ -drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ -float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount); +DRFLAC_API float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); -/* Frees memory that was allocated internally by dr_flac. */ -void drflac_free(void* p); +/* +Frees memory that was allocated internally by dr_flac. + +Set pAllocationCallbacks to the same object that was passed to drflac_open_*_and_read_pcm_frames_*(). If you originally passed in NULL, pass in NULL for this. +*/ +DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks); /* Structure representing an iterator for vorbis comments in a VORBIS_COMMENT metadata block. */ @@ -778,13 +1264,13 @@ typedef struct Initializes a vorbis comment iterator. This can be used for iterating over the vorbis comments in a VORBIS_COMMENT metadata block. */ -void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments); +DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments); /* Goes to the next vorbis comment in the given iterator. If null is returned it means there are no more comments. The returned string is NOT null terminated. */ -const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut); +DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut); /* Structure representing an iterator for cuesheet tracks in a CUESHEET metadata block. */ @@ -819,26 +1305,11 @@ typedef struct Initializes a cuesheet track iterator. This can be used for iterating over the cuesheet tracks in a CUESHEET metadata block. */ -void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData); +DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData); /* Goes to the next cuesheet track in the given iterator. If DRFLAC_FALSE is returned it means there are no more comments. */ -drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack); - - -/* Deprecated APIs */ -DRFLAC_DEPRECATED drflac_uint64 drflac_read_s32(drflac* pFlac, drflac_uint64 samplesToRead, drflac_int32* pBufferOut); /* Use drflac_read_pcm_frames_s32() instead. */ -DRFLAC_DEPRECATED drflac_uint64 drflac_read_s16(drflac* pFlac, drflac_uint64 samplesToRead, drflac_int16* pBufferOut); /* Use drflac_read_pcm_frames_s16() instead. */ -DRFLAC_DEPRECATED drflac_uint64 drflac_read_f32(drflac* pFlac, drflac_uint64 samplesToRead, float* pBufferOut); /* Use drflac_read_pcm_frames_f32() instead. */ -DRFLAC_DEPRECATED drflac_bool32 drflac_seek_to_sample(drflac* pFlac, drflac_uint64 sampleIndex); /* Use drflac_seek_to_pcm_frame() instead. */ -DRFLAC_DEPRECATED drflac_int32* drflac_open_and_decode_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_and_read_pcm_frames_s32(). */ -DRFLAC_DEPRECATED drflac_int16* drflac_open_and_decode_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_and_read_pcm_frames_s16(). */ -DRFLAC_DEPRECATED float* drflac_open_and_decode_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_and_read_pcm_frames_f32(). */ -DRFLAC_DEPRECATED drflac_int32* drflac_open_and_decode_file_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_file_and_read_pcm_frames_s32(). */ -DRFLAC_DEPRECATED drflac_int16* drflac_open_and_decode_file_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_file_and_read_pcm_frames_s16(). */ -DRFLAC_DEPRECATED float* drflac_open_and_decode_file_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_file_and_read_pcm_frames_f32(). */ -DRFLAC_DEPRECATED drflac_int32* drflac_open_and_decode_memory_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_memory_and_read_pcm_frames_s32(). */ -DRFLAC_DEPRECATED drflac_int16* drflac_open_and_decode_memory_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_memory_and_read_pcm_frames_s16(). */ -DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalSampleCount); /* Use drflac_open_memory_and_read_pcm_frames_f32(). */ +DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack); + #ifdef __cplusplus } @@ -853,10 +1324,12 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz ************************************************************************************************************************************************************ ************************************************************************************************************************************************************/ -#ifdef DR_FLAC_IMPLEMENTATION +#if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) +#ifndef dr_flac_c +#define dr_flac_c /* Disable some annoying warnings. */ -#if defined(__GNUC__) +#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) #pragma GCC diagnostic push #if __GNUC__ >= 7 #pragma GCC diagnostic ignored "-Wimplicit-fallthrough" @@ -867,6 +1340,9 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz #ifndef _BSD_SOURCE #define _BSD_SOURCE #endif + #ifndef _DEFAULT_SOURCE + #define _DEFAULT_SOURCE + #endif #ifndef __USE_BSD #define __USE_BSD #endif @@ -877,13 +1353,24 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz #include #ifdef _MSC_VER -#define DRFLAC_INLINE __forceinline -#else -#ifdef __GNUC__ -#define DRFLAC_INLINE __inline__ __attribute__((always_inline)) + #define DRFLAC_INLINE __forceinline +#elif defined(__GNUC__) + /* + I've had a bug report where GCC is emitting warnings about functions possibly not being inlineable. This warning happens when + the __attribute__((always_inline)) attribute is defined without an "inline" statement. I think therefore there must be some + case where "__inline__" is not always defined, thus the compiler emitting these warnings. When using -std=c89 or -ansi on the + command line, we cannot use the "inline" keyword and instead need to use "__inline__". In an attempt to work around this issue + I am using "__inline__" only when we're compiling in strict ANSI mode. + */ + #if defined(__STRICT_ANSI__) + #define DRFLAC_INLINE __inline__ __attribute__((always_inline)) + #else + #define DRFLAC_INLINE inline __attribute__((always_inline)) + #endif +#elif defined(__WATCOMC__) + #define DRFLAC_INLINE __inline #else -#define DRFLAC_INLINE -#endif + #define DRFLAC_INLINE #endif /* CPU architecture. */ @@ -891,11 +1378,19 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz #define DRFLAC_X64 #elif defined(__i386) || defined(_M_IX86) #define DRFLAC_X86 -#elif defined(__arm__) || defined(_M_ARM) +#elif defined(__arm__) || defined(_M_ARM) || defined(_M_ARM64) #define DRFLAC_ARM #endif -/* Intrinsics Support */ +/* +Intrinsics Support + +There's a bug in GCC 4.2.x which results in an incorrect compilation error when using _mm_slli_epi32() where it complains with + + "error: shift must be an immediate" + +Unfortuantely dr_flac depends on this for a few things so we're just going to disable SSE on GCC 4.2 and below. +*/ #if !defined(DR_FLAC_NO_SIMD) #if defined(DRFLAC_X64) || defined(DRFLAC_X86) #if defined(_MSC_VER) && !defined(__clang__) @@ -906,7 +1401,7 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz #if _MSC_VER >= 1600 && !defined(DRFLAC_NO_SSE41) /* 2010 */ #define DRFLAC_SUPPORT_SSE41 #endif - #else + #elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) /* Assume GNUC-style. */ #if defined(__SSE2__) && !defined(DRFLAC_NO_SSE2) #define DRFLAC_SUPPORT_SSE2 @@ -971,7 +1466,7 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz It looks like the -fPIC option uses the ebx register which GCC complains about. We can work around this by just using a different register, the specific register of which I'm letting the compiler decide on. The "k" prefix is used to specify a 32-bit register. The {...} syntax is for supporting different assembly dialects. - + What's basically happening is that we're saving and restoring the ebx register manually. */ #if defined(DRFLAC_X86) && defined(__PIC__) @@ -995,7 +1490,7 @@ DRFLAC_DEPRECATED float* drflac_open_and_decode_memory_f32(const void* data, siz #define DRFLAC_NO_CPUID #endif -static DRFLAC_INLINE drflac_bool32 drflac_has_sse2() +static DRFLAC_INLINE drflac_bool32 drflac_has_sse2(void) { #if defined(DRFLAC_SUPPORT_SSE2) #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE2) @@ -1020,7 +1515,7 @@ static DRFLAC_INLINE drflac_bool32 drflac_has_sse2() #endif } -static DRFLAC_INLINE drflac_bool32 drflac_has_sse41() +static DRFLAC_INLINE drflac_bool32 drflac_has_sse41(void) { #if defined(DRFLAC_SUPPORT_SSE41) #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE41) @@ -1046,29 +1541,33 @@ static DRFLAC_INLINE drflac_bool32 drflac_has_sse41() } -#if defined(_MSC_VER) && _MSC_VER >= 1500 && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) +#if defined(_MSC_VER) && _MSC_VER >= 1500 && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) && !defined(__clang__) #define DRFLAC_HAS_LZCNT_INTRINSIC #elif (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))) #define DRFLAC_HAS_LZCNT_INTRINSIC #elif defined(__clang__) - #if __has_builtin(__builtin_clzll) || __has_builtin(__builtin_clzl) - #define DRFLAC_HAS_LZCNT_INTRINSIC + #if defined(__has_builtin) + #if __has_builtin(__builtin_clzll) || __has_builtin(__builtin_clzl) + #define DRFLAC_HAS_LZCNT_INTRINSIC + #endif #endif #endif -#if defined(_MSC_VER) && _MSC_VER >= 1300 +#if defined(_MSC_VER) && _MSC_VER >= 1400 && !defined(__clang__) #define DRFLAC_HAS_BYTESWAP16_INTRINSIC #define DRFLAC_HAS_BYTESWAP32_INTRINSIC #define DRFLAC_HAS_BYTESWAP64_INTRINSIC #elif defined(__clang__) - #if __has_builtin(__builtin_bswap16) - #define DRFLAC_HAS_BYTESWAP16_INTRINSIC - #endif - #if __has_builtin(__builtin_bswap32) - #define DRFLAC_HAS_BYTESWAP32_INTRINSIC - #endif - #if __has_builtin(__builtin_bswap64) - #define DRFLAC_HAS_BYTESWAP64_INTRINSIC + #if defined(__has_builtin) + #if __has_builtin(__builtin_bswap16) + #define DRFLAC_HAS_BYTESWAP16_INTRINSIC + #endif + #if __has_builtin(__builtin_bswap32) + #define DRFLAC_HAS_BYTESWAP32_INTRINSIC + #endif + #if __has_builtin(__builtin_bswap64) + #define DRFLAC_HAS_BYTESWAP64_INTRINSIC + #endif #endif #elif defined(__GNUC__) #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) @@ -1078,6 +1577,27 @@ static DRFLAC_INLINE drflac_bool32 drflac_has_sse41() #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) #define DRFLAC_HAS_BYTESWAP16_INTRINSIC #endif +#elif defined(__WATCOMC__) && defined(__386__) + #define DRFLAC_HAS_BYTESWAP16_INTRINSIC + #define DRFLAC_HAS_BYTESWAP32_INTRINSIC + #define DRFLAC_HAS_BYTESWAP64_INTRINSIC + extern __inline drflac_uint16 _watcom_bswap16(drflac_uint16); + extern __inline drflac_uint32 _watcom_bswap32(drflac_uint32); + extern __inline drflac_uint64 _watcom_bswap64(drflac_uint64); +#pragma aux _watcom_bswap16 = \ + "xchg al, ah" \ + parm [ax] \ + modify [ax]; +#pragma aux _watcom_bswap32 = \ + "bswap eax" \ + parm [eax] \ + modify [eax]; +#pragma aux _watcom_bswap64 = \ + "bswap eax" \ + "bswap edx" \ + "xchg eax,edx" \ + parm [eax edx] \ + modify [eax edx]; #endif @@ -1101,15 +1621,68 @@ static DRFLAC_INLINE drflac_bool32 drflac_has_sse41() #ifndef DRFLAC_ZERO_MEMORY #define DRFLAC_ZERO_MEMORY(p, sz) memset((p), 0, (sz)) #endif +#ifndef DRFLAC_ZERO_OBJECT +#define DRFLAC_ZERO_OBJECT(p) DRFLAC_ZERO_MEMORY((p), sizeof(*(p))) +#endif #define DRFLAC_MAX_SIMD_VECTOR_SIZE 64 /* 64 for AVX-512 in the future. */ typedef drflac_int32 drflac_result; -#define DRFLAC_SUCCESS 0 -#define DRFLAC_ERROR -1 /* A generic error. */ +#define DRFLAC_SUCCESS 0 +#define DRFLAC_ERROR -1 /* A generic error. */ #define DRFLAC_INVALID_ARGS -2 -#define DRFLAC_END_OF_STREAM -128 -#define DRFLAC_CRC_MISMATCH -129 +#define DRFLAC_INVALID_OPERATION -3 +#define DRFLAC_OUT_OF_MEMORY -4 +#define DRFLAC_OUT_OF_RANGE -5 +#define DRFLAC_ACCESS_DENIED -6 +#define DRFLAC_DOES_NOT_EXIST -7 +#define DRFLAC_ALREADY_EXISTS -8 +#define DRFLAC_TOO_MANY_OPEN_FILES -9 +#define DRFLAC_INVALID_FILE -10 +#define DRFLAC_TOO_BIG -11 +#define DRFLAC_PATH_TOO_LONG -12 +#define DRFLAC_NAME_TOO_LONG -13 +#define DRFLAC_NOT_DIRECTORY -14 +#define DRFLAC_IS_DIRECTORY -15 +#define DRFLAC_DIRECTORY_NOT_EMPTY -16 +#define DRFLAC_END_OF_FILE -17 +#define DRFLAC_NO_SPACE -18 +#define DRFLAC_BUSY -19 +#define DRFLAC_IO_ERROR -20 +#define DRFLAC_INTERRUPT -21 +#define DRFLAC_UNAVAILABLE -22 +#define DRFLAC_ALREADY_IN_USE -23 +#define DRFLAC_BAD_ADDRESS -24 +#define DRFLAC_BAD_SEEK -25 +#define DRFLAC_BAD_PIPE -26 +#define DRFLAC_DEADLOCK -27 +#define DRFLAC_TOO_MANY_LINKS -28 +#define DRFLAC_NOT_IMPLEMENTED -29 +#define DRFLAC_NO_MESSAGE -30 +#define DRFLAC_BAD_MESSAGE -31 +#define DRFLAC_NO_DATA_AVAILABLE -32 +#define DRFLAC_INVALID_DATA -33 +#define DRFLAC_TIMEOUT -34 +#define DRFLAC_NO_NETWORK -35 +#define DRFLAC_NOT_UNIQUE -36 +#define DRFLAC_NOT_SOCKET -37 +#define DRFLAC_NO_ADDRESS -38 +#define DRFLAC_BAD_PROTOCOL -39 +#define DRFLAC_PROTOCOL_UNAVAILABLE -40 +#define DRFLAC_PROTOCOL_NOT_SUPPORTED -41 +#define DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED -42 +#define DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED -43 +#define DRFLAC_SOCKET_NOT_SUPPORTED -44 +#define DRFLAC_CONNECTION_RESET -45 +#define DRFLAC_ALREADY_CONNECTED -46 +#define DRFLAC_NOT_CONNECTED -47 +#define DRFLAC_CONNECTION_REFUSED -48 +#define DRFLAC_NO_HOST -49 +#define DRFLAC_IN_PROGRESS -50 +#define DRFLAC_CANCELLED -51 +#define DRFLAC_MEMORY_ALREADY_MAPPED -52 +#define DRFLAC_AT_END -53 +#define DRFLAC_CRC_MISMATCH -128 #define DRFLAC_SUBFRAME_CONSTANT 0 #define DRFLAC_SUBFRAME_VERBATIM 1 @@ -1125,28 +1698,31 @@ typedef drflac_int32 drflac_result; #define DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE 9 #define DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE 10 -/* -Keeps track of the number of leading samples for each sub-frame. This is required because the SSE pipeline will occasionally -reference excess prior samples. -*/ -#define DRFLAC_LEADING_SAMPLES 32 +#define drflac_align(x, a) ((((x) + (a) - 1) / (a)) * (a)) -#define drflac_align(x, a) ((((x) + (a) - 1) / (a)) * (a)) -#define drflac_assert DRFLAC_ASSERT -#define drflac_copy_memory DRFLAC_COPY_MEMORY -#define drflac_zero_memory DRFLAC_ZERO_MEMORY +DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision) +{ + if (pMajor) { + *pMajor = DRFLAC_VERSION_MAJOR; + } + + if (pMinor) { + *pMinor = DRFLAC_VERSION_MINOR; + } + + if (pRevision) { + *pRevision = DRFLAC_VERSION_REVISION; + } +} + +DRFLAC_API const char* drflac_version_string(void) +{ + return DRFLAC_VERSION_STRING; +} /* CPU caps. */ -static drflac_bool32 drflac__gIsLZCNTSupported = DRFLAC_FALSE; -#ifndef DRFLAC_NO_CPUID -/* -I've had a bug report that Clang's ThreadSanitizer presents a warning in this function. Having reviewed this, this does -actually make sense. However, since CPU caps should never differ for a running process, I don't think the trade off of -complicating internal API's by passing around CPU caps versus just disabling the warnings is worthwhile. I'm therefore -just going to disable these warnings. -*/ #if defined(__has_feature) #if __has_feature(thread_sanitizer) #define DRFLAC_NO_THREAD_SANITIZE __attribute__((no_sanitize("thread"))) @@ -1156,18 +1732,32 @@ just going to disable these warnings. #else #define DRFLAC_NO_THREAD_SANITIZE #endif + +#if defined(DRFLAC_HAS_LZCNT_INTRINSIC) +static drflac_bool32 drflac__gIsLZCNTSupported = DRFLAC_FALSE; +#endif + +#ifndef DRFLAC_NO_CPUID static drflac_bool32 drflac__gIsSSE2Supported = DRFLAC_FALSE; static drflac_bool32 drflac__gIsSSE41Supported = DRFLAC_FALSE; -DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps() + +/* +I've had a bug report that Clang's ThreadSanitizer presents a warning in this function. Having reviewed this, this does +actually make sense. However, since CPU caps should never differ for a running process, I don't think the trade off of +complicating internal API's by passing around CPU caps versus just disabling the warnings is worthwhile. I'm therefore +just going to disable these warnings. This is disabled via the DRFLAC_NO_THREAD_SANITIZE attribute. +*/ +DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) { static drflac_bool32 isCPUCapsInitialized = DRFLAC_FALSE; if (!isCPUCapsInitialized) { - int info[4] = {0}; - /* LZCNT */ +#if defined(DRFLAC_HAS_LZCNT_INTRINSIC) + int info[4] = {0}; drflac__cpuid(info, 0x80000001); drflac__gIsLZCNTSupported = (info[2] & (1 << 5)) != 0; +#endif /* SSE2 */ drflac__gIsSSE2Supported = drflac_has_sse2(); @@ -1179,11 +1769,40 @@ DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps() isCPUCapsInitialized = DRFLAC_TRUE; } } -#endif - +#else +static drflac_bool32 drflac__gIsNEONSupported = DRFLAC_FALSE; -/* Endian Management */ -static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian() +static DRFLAC_INLINE drflac_bool32 drflac__has_neon(void) +{ +#if defined(DRFLAC_SUPPORT_NEON) + #if defined(DRFLAC_ARM) && !defined(DRFLAC_NO_NEON) + #if (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) + return DRFLAC_TRUE; /* If the compiler is allowed to freely generate NEON code we can assume support. */ + #else + /* TODO: Runtime check. */ + return DRFLAC_FALSE; + #endif + #else + return DRFLAC_FALSE; /* NEON is only supported on ARM architectures. */ + #endif +#else + return DRFLAC_FALSE; /* No compiler support. */ +#endif +} + +DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) +{ + drflac__gIsNEONSupported = drflac__has_neon(); + +#if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) + drflac__gIsLZCNTSupported = DRFLAC_TRUE; +#endif +} +#endif + + +/* Endian Management */ +static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian(void) { #if defined(DRFLAC_X86) || defined(DRFLAC_X64) return DRFLAC_TRUE; @@ -1198,10 +1817,12 @@ static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian() static DRFLAC_INLINE drflac_uint16 drflac__swap_endian_uint16(drflac_uint16 n) { #ifdef DRFLAC_HAS_BYTESWAP16_INTRINSIC - #if defined(_MSC_VER) + #if defined(_MSC_VER) && !defined(__clang__) return _byteswap_ushort(n); #elif defined(__GNUC__) || defined(__clang__) return __builtin_bswap16(n); + #elif defined(__WATCOMC__) && defined(__386__) + return _watcom_bswap16(n); #else #error "This compiler does not support the byte swap intrinsic." #endif @@ -1214,10 +1835,25 @@ static DRFLAC_INLINE drflac_uint16 drflac__swap_endian_uint16(drflac_uint16 n) static DRFLAC_INLINE drflac_uint32 drflac__swap_endian_uint32(drflac_uint32 n) { #ifdef DRFLAC_HAS_BYTESWAP32_INTRINSIC - #if defined(_MSC_VER) + #if defined(_MSC_VER) && !defined(__clang__) return _byteswap_ulong(n); #elif defined(__GNUC__) || defined(__clang__) - return __builtin_bswap32(n); + #if defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 6) && !defined(DRFLAC_64BIT) /* <-- 64-bit inline assembly has not been tested, so disabling for now. */ + /* Inline assembly optimized implementation for ARM. In my testing, GCC does not generate optimized code with __builtin_bswap32(). */ + drflac_uint32 r; + __asm__ __volatile__ ( + #if defined(DRFLAC_64BIT) + "rev %w[out], %w[in]" : [out]"=r"(r) : [in]"r"(n) /* <-- This is untested. If someone in the community could test this, that would be appreciated! */ + #else + "rev %[out], %[in]" : [out]"=r"(r) : [in]"r"(n) + #endif + ); + return r; + #else + return __builtin_bswap32(n); + #endif + #elif defined(__WATCOMC__) && defined(__386__) + return _watcom_bswap32(n); #else #error "This compiler does not support the byte swap intrinsic." #endif @@ -1232,22 +1868,25 @@ static DRFLAC_INLINE drflac_uint32 drflac__swap_endian_uint32(drflac_uint32 n) static DRFLAC_INLINE drflac_uint64 drflac__swap_endian_uint64(drflac_uint64 n) { #ifdef DRFLAC_HAS_BYTESWAP64_INTRINSIC - #if defined(_MSC_VER) + #if defined(_MSC_VER) && !defined(__clang__) return _byteswap_uint64(n); #elif defined(__GNUC__) || defined(__clang__) return __builtin_bswap64(n); + #elif defined(__WATCOMC__) && defined(__386__) + return _watcom_bswap64(n); #else #error "This compiler does not support the byte swap intrinsic." #endif #else - return ((n & (drflac_uint64)0xFF00000000000000) >> 56) | - ((n & (drflac_uint64)0x00FF000000000000) >> 40) | - ((n & (drflac_uint64)0x0000FF0000000000) >> 24) | - ((n & (drflac_uint64)0x000000FF00000000) >> 8) | - ((n & (drflac_uint64)0x00000000FF000000) << 8) | - ((n & (drflac_uint64)0x0000000000FF0000) << 24) | - ((n & (drflac_uint64)0x000000000000FF00) << 40) | - ((n & (drflac_uint64)0x00000000000000FF) << 56); + /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ + return ((n & ((drflac_uint64)0xFF000000 << 32)) >> 56) | + ((n & ((drflac_uint64)0x00FF0000 << 32)) >> 40) | + ((n & ((drflac_uint64)0x0000FF00 << 32)) >> 24) | + ((n & ((drflac_uint64)0x000000FF << 32)) >> 8) | + ((n & ((drflac_uint64)0xFF000000 )) << 8) | + ((n & ((drflac_uint64)0x00FF0000 )) << 24) | + ((n & ((drflac_uint64)0x0000FF00 )) << 40) | + ((n & ((drflac_uint64)0x000000FF )) << 56); #endif } @@ -1391,8 +2030,8 @@ static DRFLAC_INLINE drflac_uint8 drflac_crc8(drflac_uint8 crc, drflac_uint32 da static drflac_uint64 leftoverDataMaskTable[8] = { 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F }; - - drflac_assert(count <= 32); + + DRFLAC_ASSERT(count <= 32); wholeBytes = count >> 3; leftoverBits = count - (wholeBytes*8); @@ -1403,7 +2042,7 @@ static DRFLAC_INLINE drflac_uint8 drflac_crc8(drflac_uint8 crc, drflac_uint32 da case 3: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); case 2: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); case 1: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); - case 0: if (leftoverBits > 0) crc = (crc << leftoverBits) ^ drflac__crc8_table[(crc >> (8 - leftoverBits)) ^ (data & leftoverDataMask)]; + case 0: if (leftoverBits > 0) crc = (drflac_uint8)((crc << leftoverBits) ^ drflac__crc8_table[(crc >> (8 - leftoverBits)) ^ (data & leftoverDataMask)]); } return crc; #endif @@ -1415,6 +2054,22 @@ static DRFLAC_INLINE drflac_uint16 drflac_crc16_byte(drflac_uint16 crc, drflac_u return (crc << 8) ^ drflac__crc16_table[(drflac_uint8)(crc >> 8) ^ data]; } +static DRFLAC_INLINE drflac_uint16 drflac_crc16_cache(drflac_uint16 crc, drflac_cache_t data) +{ +#ifdef DRFLAC_64BIT + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); +#endif + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); + crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); + + return crc; +} + static DRFLAC_INLINE drflac_uint16 drflac_crc16_bytes(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 byteCount) { switch (byteCount) @@ -1434,6 +2089,7 @@ static DRFLAC_INLINE drflac_uint16 drflac_crc16_bytes(drflac_uint16 crc, drflac_ return crc; } +#if 0 static DRFLAC_INLINE drflac_uint16 drflac_crc16__32bit(drflac_uint16 crc, drflac_uint32 data, drflac_uint32 count) { #ifdef DR_FLAC_NO_CRC @@ -1464,10 +2120,10 @@ static DRFLAC_INLINE drflac_uint16 drflac_crc16__32bit(drflac_uint16 crc, drflac 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F }; - drflac_assert(count <= 64); - + DRFLAC_ASSERT(count <= 64); + wholeBytes = count >> 3; - leftoverBits = count - (wholeBytes*8); + leftoverBits = count & 7; leftoverDataMask = leftoverDataMaskTable[leftoverBits]; switch (wholeBytes) { @@ -1498,11 +2154,11 @@ static DRFLAC_INLINE drflac_uint16 drflac_crc16__64bit(drflac_uint16 crc, drflac static drflac_uint64 leftoverDataMaskTable[8] = { 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F }; - - drflac_assert(count <= 64); + + DRFLAC_ASSERT(count <= 64); wholeBytes = count >> 3; - leftoverBits = count - (wholeBytes*8); + leftoverBits = count & 7; leftoverDataMask = leftoverDataMaskTable[leftoverBits]; switch (wholeBytes) { @@ -1530,6 +2186,7 @@ static DRFLAC_INLINE drflac_uint16 drflac_crc16(drflac_uint16 crc, drflac_cache_ return drflac_crc16__32bit(crc, data, count); #endif } +#endif #ifdef DRFLAC_64BIT @@ -1569,14 +2226,18 @@ static DRFLAC_INLINE void drflac__reset_crc16(drflac_bs* bs) static DRFLAC_INLINE void drflac__update_crc16(drflac_bs* bs) { - bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache, DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bs->crc16CacheIgnoredBytes); - bs->crc16CacheIgnoredBytes = 0; + if (bs->crc16CacheIgnoredBytes == 0) { + bs->crc16 = drflac_crc16_cache(bs->crc16, bs->crc16Cache); + } else { + bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache, DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bs->crc16CacheIgnoredBytes); + bs->crc16CacheIgnoredBytes = 0; + } } static DRFLAC_INLINE drflac_uint16 drflac__flush_crc16(drflac_bs* bs) { /* We should never be flushing in a situation where we are not aligned on a byte boundary. */ - drflac_assert((DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7) == 0); + DRFLAC_ASSERT((DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7) == 0); /* The bits that were read from the L1 cache need to be accumulated. The number of bytes needing to be accumulated is determined @@ -1689,7 +2350,7 @@ static drflac_bool32 drflac__reload_cache(drflac_bs* bs) return DRFLAC_FALSE; } - drflac_assert(bytesRead < DRFLAC_CACHE_L1_SIZE_BYTES(bs)); + DRFLAC_ASSERT(bytesRead < DRFLAC_CACHE_L1_SIZE_BYTES(bs)); bs->consumedBits = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bytesRead) * 8; bs->cache = drflac__be2host__cache_line(bs->unalignedCache); @@ -1720,10 +2381,10 @@ static void drflac__reset_cache(drflac_bs* bs) static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned int bitCount, drflac_uint32* pResultOut) { - drflac_assert(bs != NULL); - drflac_assert(pResultOut != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 32); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResultOut != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 32); if (bs->consumedBits == DRFLAC_CACHE_L1_SIZE_BITS(bs)) { if (!drflac__reload_cache(bs)) { @@ -1759,7 +2420,11 @@ static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned i /* It straddles the cached data. It will never cover more than the next chunk. We just read the number in two parts and combine them. */ drflac_uint32 bitCountHi = DRFLAC_CACHE_L1_BITS_REMAINING(bs); drflac_uint32 bitCountLo = bitCount - bitCountHi; - drflac_uint32 resultHi = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountHi); + drflac_uint32 resultHi; + + DRFLAC_ASSERT(bitCountHi > 0); + DRFLAC_ASSERT(bitCountHi < 32); + resultHi = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountHi); if (!drflac__reload_cache(bs)) { return DRFLAC_FALSE; @@ -1775,19 +2440,22 @@ static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned i static drflac_bool32 drflac__read_int32(drflac_bs* bs, unsigned int bitCount, drflac_int32* pResult) { drflac_uint32 result; - drflac_uint32 signbit; - drflac_assert(bs != NULL); - drflac_assert(pResult != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 32); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResult != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 32); if (!drflac__read_uint32(bs, bitCount, &result)) { return DRFLAC_FALSE; } - signbit = ((result >> (bitCount-1)) & 0x01); - result |= (~signbit + 1) << bitCount; + /* Do not attempt to shift by 32 as it's undefined. */ + if (bitCount < 32) { + drflac_uint32 signbit; + signbit = ((result >> (bitCount-1)) & 0x01); + result |= (~signbit + 1) << bitCount; + } *pResult = (drflac_int32)result; return DRFLAC_TRUE; @@ -1799,8 +2467,8 @@ static drflac_bool32 drflac__read_uint64(drflac_bs* bs, unsigned int bitCount, d drflac_uint32 resultHi; drflac_uint32 resultLo; - drflac_assert(bitCount <= 64); - drflac_assert(bitCount > 32); + DRFLAC_ASSERT(bitCount <= 64); + DRFLAC_ASSERT(bitCount > 32); if (!drflac__read_uint32(bs, bitCount - 32, &resultHi)) { return DRFLAC_FALSE; @@ -1822,7 +2490,7 @@ static drflac_bool32 drflac__read_int64(drflac_bs* bs, unsigned int bitCount, dr drflac_uint64 result; drflac_uint64 signbit; - drflac_assert(bitCount <= 64); + DRFLAC_ASSERT(bitCount <= 64); if (!drflac__read_uint64(bs, bitCount, &result)) { return DRFLAC_FALSE; @@ -1840,10 +2508,10 @@ static drflac_bool32 drflac__read_uint16(drflac_bs* bs, unsigned int bitCount, d { drflac_uint32 result; - drflac_assert(bs != NULL); - drflac_assert(pResult != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 16); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResult != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 16); if (!drflac__read_uint32(bs, bitCount, &result)) { return DRFLAC_FALSE; @@ -1858,10 +2526,10 @@ static drflac_bool32 drflac__read_int16(drflac_bs* bs, unsigned int bitCount, dr { drflac_int32 result; - drflac_assert(bs != NULL); - drflac_assert(pResult != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 16); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResult != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 16); if (!drflac__read_int32(bs, bitCount, &result)) { return DRFLAC_FALSE; @@ -1876,10 +2544,10 @@ static drflac_bool32 drflac__read_uint8(drflac_bs* bs, unsigned int bitCount, dr { drflac_uint32 result; - drflac_assert(bs != NULL); - drflac_assert(pResult != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 8); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResult != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 8); if (!drflac__read_uint32(bs, bitCount, &result)) { return DRFLAC_FALSE; @@ -1893,10 +2561,10 @@ static drflac_bool32 drflac__read_int8(drflac_bs* bs, unsigned int bitCount, drf { drflac_int32 result; - drflac_assert(bs != NULL); - drflac_assert(pResult != NULL); - drflac_assert(bitCount > 0); - drflac_assert(bitCount <= 8); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pResult != NULL); + DRFLAC_ASSERT(bitCount > 0); + DRFLAC_ASSERT(bitCount <= 8); if (!drflac__read_int32(bs, bitCount, &result)) { return DRFLAC_FALSE; @@ -1956,7 +2624,7 @@ static drflac_bool32 drflac__seek_bits(drflac_bs* bs, size_t bitsToSeek) bitsToSeek = 0; /* <-- Necessary for the assert below. */ } - drflac_assert(bitsToSeek == 0); + DRFLAC_ASSERT(bitsToSeek == 0); return DRFLAC_TRUE; } } @@ -1965,7 +2633,7 @@ static drflac_bool32 drflac__seek_bits(drflac_bs* bs, size_t bitsToSeek) /* This function moves the bit streamer to the first bit after the sync code (bit 15 of the of the frame header). It will also update the CRC-16. */ static drflac_bool32 drflac__find_and_seek_to_next_sync_code(drflac_bs* bs) { - drflac_assert(bs != NULL); + DRFLAC_ASSERT(bs != NULL); /* The sync code is always aligned to 8 bits. This is convenient for us because it means we can do byte-aligned movements. The first @@ -2007,12 +2675,15 @@ static drflac_bool32 drflac__find_and_seek_to_next_sync_code(drflac_bs* bs) } -#if !defined(DR_FLAC_NO_SIMD) && defined(DRFLAC_HAS_LZCNT_INTRINSIC) +#if defined(DRFLAC_HAS_LZCNT_INTRINSIC) #define DRFLAC_IMPLEMENT_CLZ_LZCNT #endif -#if defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(DRFLAC_X64) || defined(DRFLAC_X86)) +#if defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(__clang__) #define DRFLAC_IMPLEMENT_CLZ_MSVC #endif +#if defined(__WATCOMC__) && defined(__386__) +#define DRFLAC_IMPLEMENT_CLZ_WATCOM +#endif static DRFLAC_INLINE drflac_uint32 drflac__clz_software(drflac_cache_t x) { @@ -2048,19 +2719,42 @@ static DRFLAC_INLINE drflac_uint32 drflac__clz_software(drflac_cache_t x) } #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT -static DRFLAC_INLINE drflac_bool32 drflac__is_lzcnt_supported() +static DRFLAC_INLINE drflac_bool32 drflac__is_lzcnt_supported(void) { - /* If the compiler itself does not support the intrinsic then we'll need to return false. */ -#ifdef DRFLAC_HAS_LZCNT_INTRINSIC - return drflac__gIsLZCNTSupported; + /* Fast compile time check for ARM. */ +#if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) + return DRFLAC_TRUE; #else - return DRFLAC_FALSE; + /* If the compiler itself does not support the intrinsic then we'll need to return false. */ + #ifdef DRFLAC_HAS_LZCNT_INTRINSIC + return drflac__gIsLZCNTSupported; + #else + return DRFLAC_FALSE; + #endif #endif } static DRFLAC_INLINE drflac_uint32 drflac__clz_lzcnt(drflac_cache_t x) { -#if defined(_MSC_VER) && !defined(__clang__) + /* + It's critical for competitive decoding performance that this function be highly optimal. With MSVC we can use the __lzcnt64() and __lzcnt() intrinsics + to achieve good performance, however on GCC and Clang it's a little bit more annoying. The __builtin_clzl() and __builtin_clzll() intrinsics leave + it undefined as to the return value when `x` is 0. We need this to be well defined as returning 32 or 64, depending on whether or not it's a 32- or + 64-bit build. To work around this we would need to add a conditional to check for the x = 0 case, but this creates unnecessary inefficiency. To work + around this problem I have written some inline assembly to emit the LZCNT (x86) or CLZ (ARM) instruction directly which removes the need to include + the conditional. This has worked well in the past, but for some reason Clang's MSVC compatible driver, clang-cl, does not seem to be handling this + in the same way as the normal Clang driver. It seems that `clang-cl` is just outputting the wrong results sometimes, maybe due to some register + getting clobbered? + + I'm not sure if this is a bug with dr_flac's inlined assembly (most likely), a bug in `clang-cl` or just a misunderstanding on my part with inline + assembly rules for `clang-cl`. If somebody can identify an error in dr_flac's inlined assembly I'm happy to get that fixed. + + Fortunately there is an easy workaround for this. Clang implements MSVC-specific intrinsics for compatibility. It also defines _MSC_VER for extra + compatibility. We can therefore just check for _MSC_VER and use the MSVC intrinsic which, fortunately for us, Clang supports. It would still be nice + to know how to fix the inlined assembly for correctness sake, however. + */ + +#if defined(_MSC_VER) /*&& !defined(__clang__)*/ /* <-- Intentionally wanting Clang to use the MSVC __lzcnt64/__lzcnt intrinsics due to above ^. */ #ifdef DRFLAC_64BIT return (drflac_uint32)__lzcnt64(x); #else @@ -2068,13 +2762,46 @@ static DRFLAC_INLINE drflac_uint32 drflac__clz_lzcnt(drflac_cache_t x) #endif #else #if defined(__GNUC__) || defined(__clang__) - if (x == 0) { - return sizeof(x)*8; - } - #ifdef DRFLAC_64BIT - return (drflac_uint32)__builtin_clzll((drflac_uint64)x); + #if defined(DRFLAC_X64) + { + drflac_uint64 r; + __asm__ __volatile__ ( + "lzcnt{ %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" + ); + + return (drflac_uint32)r; + } + #elif defined(DRFLAC_X86) + { + drflac_uint32 r; + __asm__ __volatile__ ( + "lzcnt{l %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" + ); + + return r; + } + #elif defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) && !defined(DRFLAC_64BIT) /* <-- I haven't tested 64-bit inline assembly, so only enabling this for the 32-bit build for now. */ + { + unsigned int r; + __asm__ __volatile__ ( + #if defined(DRFLAC_64BIT) + "clz %w[out], %w[in]" : [out]"=r"(r) : [in]"r"(x) /* <-- This is untested. If someone in the community could test this, that would be appreciated! */ + #else + "clz %[out], %[in]" : [out]"=r"(r) : [in]"r"(x) + #endif + ); + + return r; + } #else - return (drflac_uint32)__builtin_clzl((drflac_uint32)x); + if (x == 0) { + return sizeof(x)*8; + } + #ifdef DRFLAC_64BIT + return (drflac_uint32)__builtin_clzll((drflac_uint64)x); + #else + return (drflac_uint32)__builtin_clzl((drflac_uint32)x); + #endif #endif #else /* Unsupported compiler. */ @@ -2104,6 +2831,16 @@ static DRFLAC_INLINE drflac_uint32 drflac__clz_msvc(drflac_cache_t x) } #endif +#ifdef DRFLAC_IMPLEMENT_CLZ_WATCOM +static __inline drflac_uint32 drflac__clz_watcom (drflac_uint32); +#pragma aux drflac__clz_watcom = \ + "bsr eax, eax" \ + "xor eax, 31" \ + parm [eax] nomemory \ + value [eax] \ + modify exact [eax] nomemory; +#endif + static DRFLAC_INLINE drflac_uint32 drflac__clz(drflac_cache_t x) { #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT @@ -2114,6 +2851,8 @@ static DRFLAC_INLINE drflac_uint32 drflac__clz(drflac_cache_t x) { #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC return drflac__clz_msvc(x); +#elif defined(DRFLAC_IMPLEMENT_CLZ_WATCOM) + return (x == 0) ? sizeof(x)*8 : drflac__clz_watcom(x); #else return drflac__clz_software(x); #endif @@ -2147,8 +2886,8 @@ static DRFLAC_INLINE drflac_bool32 drflac__seek_past_next_set_bit(drflac_bs* bs, static drflac_bool32 drflac__seek_to_byte(drflac_bs* bs, drflac_uint64 offsetFromStart) { - drflac_assert(bs != NULL); - drflac_assert(offsetFromStart > 0); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(offsetFromStart > 0); /* Seeking from the start is not quite as trivial as it sounds because the onSeek callback takes a signed 32-bit integer (which @@ -2190,19 +2929,19 @@ static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64 { drflac_uint8 crc; drflac_uint64 result; - unsigned char utf8[7] = {0}; + drflac_uint8 utf8[7] = {0}; int byteCount; int i; - drflac_assert(bs != NULL); - drflac_assert(pNumberOut != NULL); - drflac_assert(pCRCOut != NULL); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pNumberOut != NULL); + DRFLAC_ASSERT(pCRCOut != NULL); crc = *pCRCOut; if (!drflac__read_uint8(bs, 8, utf8)) { *pNumberOut = 0; - return DRFLAC_END_OF_STREAM; + return DRFLAC_AT_END; } crc = drflac_crc8(crc, utf8[0], 8); @@ -2212,7 +2951,7 @@ static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64 return DRFLAC_SUCCESS; } - byteCount = 1; + /*byteCount = 1;*/ if ((utf8[0] & 0xE0) == 0xC0) { byteCount = 2; } else if ((utf8[0] & 0xF0) == 0xE0) { @@ -2231,13 +2970,13 @@ static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64 } /* Read extra bytes. */ - drflac_assert(byteCount > 1); + DRFLAC_ASSERT(byteCount > 1); result = (drflac_uint64)(utf8[0] & (0xFF >> (byteCount + 1))); for (i = 1; i < byteCount; ++i) { if (!drflac__read_uint8(bs, 8, utf8 + i)) { *pNumberOut = 0; - return DRFLAC_END_OF_STREAM; + return DRFLAC_AT_END; } crc = drflac_crc8(crc, utf8[i], 8); @@ -2261,7 +3000,7 @@ static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_32(drflac_uint32 { drflac_int32 prediction = 0; - drflac_assert(order <= 32); + DRFLAC_ASSERT(order <= 32); /* 32-bit version. */ @@ -2309,7 +3048,7 @@ static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64(drflac_uint32 { drflac_int64 prediction; - drflac_assert(order <= 32); + DRFLAC_ASSERT(order <= 32); /* 64-bit version. */ @@ -2486,436 +3225,6 @@ static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64(drflac_uint32 return (drflac_int32)(prediction >> shift); } -static DRFLAC_INLINE void drflac__calculate_prediction_64_x4(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, const drflac_uint32 riceParamParts[4], drflac_int32* pDecodedSamples) -{ - drflac_int64 prediction0 = 0; - drflac_int64 prediction1 = 0; - drflac_int64 prediction2 = 0; - drflac_int64 prediction3 = 0; - - drflac_assert(order <= 32); - - switch (order) - { - case 32: - prediction0 += coefficients[31] * (drflac_int64)pDecodedSamples[-32]; - prediction1 += coefficients[31] * (drflac_int64)pDecodedSamples[-31]; - prediction2 += coefficients[31] * (drflac_int64)pDecodedSamples[-30]; - prediction3 += coefficients[31] * (drflac_int64)pDecodedSamples[-29]; - case 31: - prediction0 += coefficients[30] * (drflac_int64)pDecodedSamples[-31]; - prediction1 += coefficients[30] * (drflac_int64)pDecodedSamples[-30]; - prediction2 += coefficients[30] * (drflac_int64)pDecodedSamples[-29]; - prediction3 += coefficients[30] * (drflac_int64)pDecodedSamples[-28]; - case 30: - prediction0 += coefficients[29] * (drflac_int64)pDecodedSamples[-30]; - prediction1 += coefficients[29] * (drflac_int64)pDecodedSamples[-29]; - prediction2 += coefficients[29] * (drflac_int64)pDecodedSamples[-28]; - prediction3 += coefficients[29] * (drflac_int64)pDecodedSamples[-27]; - case 29: - prediction0 += coefficients[28] * (drflac_int64)pDecodedSamples[-29]; - prediction1 += coefficients[28] * (drflac_int64)pDecodedSamples[-28]; - prediction2 += coefficients[28] * (drflac_int64)pDecodedSamples[-27]; - prediction3 += coefficients[28] * (drflac_int64)pDecodedSamples[-26]; - case 28: - prediction0 += coefficients[27] * (drflac_int64)pDecodedSamples[-28]; - prediction1 += coefficients[27] * (drflac_int64)pDecodedSamples[-27]; - prediction2 += coefficients[27] * (drflac_int64)pDecodedSamples[-26]; - prediction3 += coefficients[27] * (drflac_int64)pDecodedSamples[-25]; - case 27: - prediction0 += coefficients[26] * (drflac_int64)pDecodedSamples[-27]; - prediction1 += coefficients[26] * (drflac_int64)pDecodedSamples[-26]; - prediction2 += coefficients[26] * (drflac_int64)pDecodedSamples[-25]; - prediction3 += coefficients[26] * (drflac_int64)pDecodedSamples[-24]; - case 26: - prediction0 += coefficients[25] * (drflac_int64)pDecodedSamples[-26]; - prediction1 += coefficients[25] * (drflac_int64)pDecodedSamples[-25]; - prediction2 += coefficients[25] * (drflac_int64)pDecodedSamples[-24]; - prediction3 += coefficients[25] * (drflac_int64)pDecodedSamples[-23]; - case 25: - prediction0 += coefficients[24] * (drflac_int64)pDecodedSamples[-25]; - prediction1 += coefficients[24] * (drflac_int64)pDecodedSamples[-24]; - prediction2 += coefficients[24] * (drflac_int64)pDecodedSamples[-23]; - prediction3 += coefficients[24] * (drflac_int64)pDecodedSamples[-22]; - case 24: - prediction0 += coefficients[23] * (drflac_int64)pDecodedSamples[-24]; - prediction1 += coefficients[23] * (drflac_int64)pDecodedSamples[-23]; - prediction2 += coefficients[23] * (drflac_int64)pDecodedSamples[-22]; - prediction3 += coefficients[23] * (drflac_int64)pDecodedSamples[-21]; - case 23: - prediction0 += coefficients[22] * (drflac_int64)pDecodedSamples[-23]; - prediction1 += coefficients[22] * (drflac_int64)pDecodedSamples[-22]; - prediction2 += coefficients[22] * (drflac_int64)pDecodedSamples[-21]; - prediction3 += coefficients[22] * (drflac_int64)pDecodedSamples[-20]; - case 22: - prediction0 += coefficients[21] * (drflac_int64)pDecodedSamples[-22]; - prediction1 += coefficients[21] * (drflac_int64)pDecodedSamples[-21]; - prediction2 += coefficients[21] * (drflac_int64)pDecodedSamples[-20]; - prediction3 += coefficients[21] * (drflac_int64)pDecodedSamples[-19]; - case 21: - prediction0 += coefficients[20] * (drflac_int64)pDecodedSamples[-21]; - prediction1 += coefficients[20] * (drflac_int64)pDecodedSamples[-20]; - prediction2 += coefficients[20] * (drflac_int64)pDecodedSamples[-19]; - prediction3 += coefficients[20] * (drflac_int64)pDecodedSamples[-18]; - case 20: - prediction0 += coefficients[19] * (drflac_int64)pDecodedSamples[-20]; - prediction1 += coefficients[19] * (drflac_int64)pDecodedSamples[-19]; - prediction2 += coefficients[19] * (drflac_int64)pDecodedSamples[-18]; - prediction3 += coefficients[19] * (drflac_int64)pDecodedSamples[-17]; - case 19: - prediction0 += coefficients[18] * (drflac_int64)pDecodedSamples[-19]; - prediction1 += coefficients[18] * (drflac_int64)pDecodedSamples[-18]; - prediction2 += coefficients[18] * (drflac_int64)pDecodedSamples[-17]; - prediction3 += coefficients[18] * (drflac_int64)pDecodedSamples[-16]; - case 18: - prediction0 += coefficients[17] * (drflac_int64)pDecodedSamples[-18]; - prediction1 += coefficients[17] * (drflac_int64)pDecodedSamples[-17]; - prediction2 += coefficients[17] * (drflac_int64)pDecodedSamples[-16]; - prediction3 += coefficients[17] * (drflac_int64)pDecodedSamples[-15]; - case 17: - prediction0 += coefficients[16] * (drflac_int64)pDecodedSamples[-17]; - prediction1 += coefficients[16] * (drflac_int64)pDecodedSamples[-16]; - prediction2 += coefficients[16] * (drflac_int64)pDecodedSamples[-15]; - prediction3 += coefficients[16] * (drflac_int64)pDecodedSamples[-14]; - - case 16: - prediction0 += coefficients[15] * (drflac_int64)pDecodedSamples[-16]; - prediction1 += coefficients[15] * (drflac_int64)pDecodedSamples[-15]; - prediction2 += coefficients[15] * (drflac_int64)pDecodedSamples[-14]; - prediction3 += coefficients[15] * (drflac_int64)pDecodedSamples[-13]; - case 15: - prediction0 += coefficients[14] * (drflac_int64)pDecodedSamples[-15]; - prediction1 += coefficients[14] * (drflac_int64)pDecodedSamples[-14]; - prediction2 += coefficients[14] * (drflac_int64)pDecodedSamples[-13]; - prediction3 += coefficients[14] * (drflac_int64)pDecodedSamples[-12]; - case 14: - prediction0 += coefficients[13] * (drflac_int64)pDecodedSamples[-14]; - prediction1 += coefficients[13] * (drflac_int64)pDecodedSamples[-13]; - prediction2 += coefficients[13] * (drflac_int64)pDecodedSamples[-12]; - prediction3 += coefficients[13] * (drflac_int64)pDecodedSamples[-11]; - case 13: - prediction0 += coefficients[12] * (drflac_int64)pDecodedSamples[-13]; - prediction1 += coefficients[12] * (drflac_int64)pDecodedSamples[-12]; - prediction2 += coefficients[12] * (drflac_int64)pDecodedSamples[-11]; - prediction3 += coefficients[12] * (drflac_int64)pDecodedSamples[-10]; - case 12: - prediction0 += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; - prediction1 += coefficients[11] * (drflac_int64)pDecodedSamples[-11]; - prediction2 += coefficients[11] * (drflac_int64)pDecodedSamples[-10]; - prediction3 += coefficients[11] * (drflac_int64)pDecodedSamples[- 9]; - case 11: - prediction0 += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; - prediction1 += coefficients[10] * (drflac_int64)pDecodedSamples[-10]; - prediction2 += coefficients[10] * (drflac_int64)pDecodedSamples[- 9]; - prediction3 += coefficients[10] * (drflac_int64)pDecodedSamples[- 8]; - case 10: - prediction0 += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; - prediction1 += coefficients[9] * (drflac_int64)pDecodedSamples[- 9]; - prediction2 += coefficients[9] * (drflac_int64)pDecodedSamples[- 8]; - prediction3 += coefficients[9] * (drflac_int64)pDecodedSamples[- 7]; - case 9: - prediction0 += coefficients[8] * (drflac_int64)pDecodedSamples[- 9]; - prediction1 += coefficients[8] * (drflac_int64)pDecodedSamples[- 8]; - prediction2 += coefficients[8] * (drflac_int64)pDecodedSamples[- 7]; - prediction3 += coefficients[8] * (drflac_int64)pDecodedSamples[- 6]; - case 8: - prediction0 += coefficients[7] * (drflac_int64)pDecodedSamples[- 8]; - prediction1 += coefficients[7] * (drflac_int64)pDecodedSamples[- 7]; - prediction2 += coefficients[7] * (drflac_int64)pDecodedSamples[- 6]; - prediction3 += coefficients[7] * (drflac_int64)pDecodedSamples[- 5]; - case 7: - prediction0 += coefficients[6] * (drflac_int64)pDecodedSamples[- 7]; - prediction1 += coefficients[6] * (drflac_int64)pDecodedSamples[- 6]; - prediction2 += coefficients[6] * (drflac_int64)pDecodedSamples[- 5]; - prediction3 += coefficients[6] * (drflac_int64)pDecodedSamples[- 4]; - case 6: - prediction0 += coefficients[5] * (drflac_int64)pDecodedSamples[- 6]; - prediction1 += coefficients[5] * (drflac_int64)pDecodedSamples[- 5]; - prediction2 += coefficients[5] * (drflac_int64)pDecodedSamples[- 4]; - prediction3 += coefficients[5] * (drflac_int64)pDecodedSamples[- 3]; - case 5: - prediction0 += coefficients[4] * (drflac_int64)pDecodedSamples[- 5]; - prediction1 += coefficients[4] * (drflac_int64)pDecodedSamples[- 4]; - prediction2 += coefficients[4] * (drflac_int64)pDecodedSamples[- 3]; - prediction3 += coefficients[4] * (drflac_int64)pDecodedSamples[- 2]; - case 4: - prediction0 += coefficients[3] * (drflac_int64)pDecodedSamples[- 4]; - prediction1 += coefficients[3] * (drflac_int64)pDecodedSamples[- 3]; - prediction2 += coefficients[3] * (drflac_int64)pDecodedSamples[- 2]; - prediction3 += coefficients[3] * (drflac_int64)pDecodedSamples[- 1]; - order = 3; - } - - switch (order) - { - case 3: prediction0 += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 3]; - case 2: prediction0 += coefficients[ 1] * (drflac_int64)pDecodedSamples[- 2]; - case 1: prediction0 += coefficients[ 0] * (drflac_int64)pDecodedSamples[- 1]; - } - pDecodedSamples[0] = riceParamParts[0] + (drflac_int32)(prediction0 >> shift); - - switch (order) - { - case 3: prediction1 += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 2]; - case 2: prediction1 += coefficients[ 1] * (drflac_int64)pDecodedSamples[- 1]; - case 1: prediction1 += coefficients[ 0] * (drflac_int64)pDecodedSamples[ 0]; - } - pDecodedSamples[1] = riceParamParts[1] + (drflac_int32)(prediction1 >> shift); - - switch (order) - { - case 3: prediction2 += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 1]; - case 2: prediction2 += coefficients[ 1] * (drflac_int64)pDecodedSamples[ 0]; - case 1: prediction2 += coefficients[ 0] * (drflac_int64)pDecodedSamples[ 1]; - } - pDecodedSamples[2] = riceParamParts[2] + (drflac_int32)(prediction2 >> shift); - - switch (order) - { - case 3: prediction3 += coefficients[ 2] * (drflac_int64)pDecodedSamples[ 0]; - case 2: prediction3 += coefficients[ 1] * (drflac_int64)pDecodedSamples[ 1]; - case 1: prediction3 += coefficients[ 0] * (drflac_int64)pDecodedSamples[ 2]; - } - pDecodedSamples[3] = riceParamParts[3] + (drflac_int32)(prediction3 >> shift); -} - -#if defined(DRFLAC_SUPPORT_SSE41) -static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64__sse41(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) -{ - __m128i prediction = _mm_setzero_si128(); - - drflac_assert(order <= 32); - - switch (order) - { - case 32: - case 31: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[31], 0, coefficients[30]), _mm_set_epi32(0, pDecodedSamples[-32], 0, pDecodedSamples[-31]))); - case 30: - case 29: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[29], 0, coefficients[28]), _mm_set_epi32(0, pDecodedSamples[-30], 0, pDecodedSamples[-29]))); - case 28: - case 27: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[27], 0, coefficients[26]), _mm_set_epi32(0, pDecodedSamples[-28], 0, pDecodedSamples[-27]))); - case 26: - case 25: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[25], 0, coefficients[24]), _mm_set_epi32(0, pDecodedSamples[-26], 0, pDecodedSamples[-25]))); - case 24: - case 23: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[23], 0, coefficients[22]), _mm_set_epi32(0, pDecodedSamples[-24], 0, pDecodedSamples[-23]))); - case 22: - case 21: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[21], 0, coefficients[20]), _mm_set_epi32(0, pDecodedSamples[-22], 0, pDecodedSamples[-21]))); - case 20: - case 19: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[19], 0, coefficients[18]), _mm_set_epi32(0, pDecodedSamples[-20], 0, pDecodedSamples[-19]))); - case 18: - case 17: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[17], 0, coefficients[16]), _mm_set_epi32(0, pDecodedSamples[-18], 0, pDecodedSamples[-17]))); - case 16: - case 15: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[15], 0, coefficients[14]), _mm_set_epi32(0, pDecodedSamples[-16], 0, pDecodedSamples[-15]))); - case 14: - case 13: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[13], 0, coefficients[12]), _mm_set_epi32(0, pDecodedSamples[-14], 0, pDecodedSamples[-13]))); - case 12: - case 11: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[11], 0, coefficients[10]), _mm_set_epi32(0, pDecodedSamples[-12], 0, pDecodedSamples[-11]))); - case 10: - case 9: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 9], 0, coefficients[ 8]), _mm_set_epi32(0, pDecodedSamples[-10], 0, pDecodedSamples[- 9]))); - case 8: - case 7: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 7], 0, coefficients[ 6]), _mm_set_epi32(0, pDecodedSamples[- 8], 0, pDecodedSamples[- 7]))); - case 6: - case 5: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 5], 0, coefficients[ 4]), _mm_set_epi32(0, pDecodedSamples[- 6], 0, pDecodedSamples[- 5]))); - case 4: - case 3: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 3], 0, coefficients[ 2]), _mm_set_epi32(0, pDecodedSamples[- 4], 0, pDecodedSamples[- 3]))); - case 2: - case 1: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 1], 0, coefficients[ 0]), _mm_set_epi32(0, pDecodedSamples[- 2], 0, pDecodedSamples[- 1]))); - } - - return (drflac_int32)(( - ((drflac_uint64*)&prediction)[0] + - ((drflac_uint64*)&prediction)[1]) >> shift); -} - -static DRFLAC_INLINE void drflac__calculate_prediction_64_x2__sse41(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, const drflac_uint32 riceParamParts[4], drflac_int32* pDecodedSamples) -{ - __m128i prediction = _mm_setzero_si128(); - drflac_int64 predictions[2] = {0, 0}; - - drflac_assert(order <= 32); - - switch (order) - { - case 32: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[31], 0, coefficients[31]), _mm_set_epi32(0, pDecodedSamples[-31], 0, pDecodedSamples[-32]))); - case 31: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[30], 0, coefficients[30]), _mm_set_epi32(0, pDecodedSamples[-30], 0, pDecodedSamples[-31]))); - case 30: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[29], 0, coefficients[29]), _mm_set_epi32(0, pDecodedSamples[-29], 0, pDecodedSamples[-30]))); - case 29: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[28], 0, coefficients[28]), _mm_set_epi32(0, pDecodedSamples[-28], 0, pDecodedSamples[-29]))); - case 28: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[27], 0, coefficients[27]), _mm_set_epi32(0, pDecodedSamples[-27], 0, pDecodedSamples[-28]))); - case 27: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[26], 0, coefficients[26]), _mm_set_epi32(0, pDecodedSamples[-26], 0, pDecodedSamples[-27]))); - case 26: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[25], 0, coefficients[25]), _mm_set_epi32(0, pDecodedSamples[-25], 0, pDecodedSamples[-26]))); - case 25: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[24], 0, coefficients[24]), _mm_set_epi32(0, pDecodedSamples[-24], 0, pDecodedSamples[-25]))); - case 24: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[23], 0, coefficients[23]), _mm_set_epi32(0, pDecodedSamples[-23], 0, pDecodedSamples[-24]))); - case 23: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[22], 0, coefficients[22]), _mm_set_epi32(0, pDecodedSamples[-22], 0, pDecodedSamples[-23]))); - case 22: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[21], 0, coefficients[21]), _mm_set_epi32(0, pDecodedSamples[-21], 0, pDecodedSamples[-22]))); - case 21: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[20], 0, coefficients[20]), _mm_set_epi32(0, pDecodedSamples[-20], 0, pDecodedSamples[-21]))); - case 20: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[19], 0, coefficients[19]), _mm_set_epi32(0, pDecodedSamples[-19], 0, pDecodedSamples[-20]))); - case 19: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[18], 0, coefficients[18]), _mm_set_epi32(0, pDecodedSamples[-18], 0, pDecodedSamples[-19]))); - case 18: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[17], 0, coefficients[17]), _mm_set_epi32(0, pDecodedSamples[-17], 0, pDecodedSamples[-18]))); - case 17: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[16], 0, coefficients[16]), _mm_set_epi32(0, pDecodedSamples[-16], 0, pDecodedSamples[-17]))); - case 16: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[15], 0, coefficients[15]), _mm_set_epi32(0, pDecodedSamples[-15], 0, pDecodedSamples[-16]))); - case 15: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[14], 0, coefficients[14]), _mm_set_epi32(0, pDecodedSamples[-14], 0, pDecodedSamples[-15]))); - case 14: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[13], 0, coefficients[13]), _mm_set_epi32(0, pDecodedSamples[-13], 0, pDecodedSamples[-14]))); - case 13: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[12], 0, coefficients[12]), _mm_set_epi32(0, pDecodedSamples[-12], 0, pDecodedSamples[-13]))); - case 12: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[11], 0, coefficients[11]), _mm_set_epi32(0, pDecodedSamples[-11], 0, pDecodedSamples[-12]))); - case 11: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[10], 0, coefficients[10]), _mm_set_epi32(0, pDecodedSamples[-10], 0, pDecodedSamples[-11]))); - case 10: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 9], 0, coefficients[ 9]), _mm_set_epi32(0, pDecodedSamples[- 9], 0, pDecodedSamples[-10]))); - case 9: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 8], 0, coefficients[ 8]), _mm_set_epi32(0, pDecodedSamples[- 8], 0, pDecodedSamples[- 9]))); - case 8: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 7], 0, coefficients[ 7]), _mm_set_epi32(0, pDecodedSamples[- 7], 0, pDecodedSamples[- 8]))); - case 7: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 6], 0, coefficients[ 6]), _mm_set_epi32(0, pDecodedSamples[- 6], 0, pDecodedSamples[- 7]))); - case 6: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 5], 0, coefficients[ 5]), _mm_set_epi32(0, pDecodedSamples[- 5], 0, pDecodedSamples[- 6]))); - case 5: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 4], 0, coefficients[ 4]), _mm_set_epi32(0, pDecodedSamples[- 4], 0, pDecodedSamples[- 5]))); - case 4: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 3], 0, coefficients[ 3]), _mm_set_epi32(0, pDecodedSamples[- 3], 0, pDecodedSamples[- 4]))); - case 3: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 2], 0, coefficients[ 2]), _mm_set_epi32(0, pDecodedSamples[- 2], 0, pDecodedSamples[- 3]))); - case 2: prediction = _mm_add_epi64(prediction, _mm_mul_epi32(_mm_set_epi32(0, coefficients[ 1], 0, coefficients[ 1]), _mm_set_epi32(0, pDecodedSamples[- 1], 0, pDecodedSamples[- 2]))); - order = 1; - } - - _mm_storeu_si128((__m128i*)predictions, prediction); - - switch (order) - { - case 1: predictions[0] += coefficients[ 0] * (drflac_int64)pDecodedSamples[- 1]; - } - pDecodedSamples[0] = riceParamParts[0] + (drflac_int32)(predictions[0] >> shift); - - switch (order) - { - case 1: predictions[1] += coefficients[ 0] * (drflac_int64)pDecodedSamples[ 0]; - } - pDecodedSamples[1] = riceParamParts[1] + (drflac_int32)(predictions[1] >> shift); -} - - -static DRFLAC_INLINE __m128i drflac__mm_not_si128(__m128i a) -{ - return _mm_xor_si128(a, _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())); -} - -static DRFLAC_INLINE __m128i drflac__mm_slide1_epi32(__m128i a, __m128i b) -{ - /* a3a2a1a0/b3b2b1b0 -> a2a1a0b3 */ - - /* Result = a2a1a0b3 */ - __m128i b3a3b2a2 = _mm_unpackhi_epi32(a, b); - __m128i a2b3a2b3 = _mm_shuffle_epi32(b3a3b2a2, _MM_SHUFFLE(0, 3, 0, 3)); - __m128i a1a2a0b3 = _mm_unpacklo_epi32(a2b3a2b3, a); - __m128i a2a1a0b3 = _mm_shuffle_epi32(a1a2a0b3, _MM_SHUFFLE(2, 3, 1, 0)); - return a2a1a0b3; -} - -static DRFLAC_INLINE __m128i drflac__mm_slide2_epi32(__m128i a, __m128i b) -{ - /* Result = a1a0b3b2 */ - __m128i b1b0b3b2 = _mm_shuffle_epi32(b, _MM_SHUFFLE(1, 0, 3, 2)); - __m128i a1b3a0b2 = _mm_unpacklo_epi32(b1b0b3b2, a); - __m128i a1a0b3b2 = _mm_shuffle_epi32(a1b3a0b2, _MM_SHUFFLE(3, 1, 2, 0)); - return a1a0b3b2; -} - -static DRFLAC_INLINE __m128i drflac__mm_slide3_epi32(__m128i a, __m128i b) -{ - /* Result = a0b3b2b1 */ - __m128i b1a1b0a0 = _mm_unpacklo_epi32(a, b); - __m128i a0b1a0b1 = _mm_shuffle_epi32(b1a1b0a0, _MM_SHUFFLE(0, 3, 0, 3)); - __m128i b3a0b2b1 = _mm_unpackhi_epi32(a0b1a0b1, b); - __m128i a0b3b2b1 = _mm_shuffle_epi32(b3a0b2b1, _MM_SHUFFLE(2, 3, 1, 0)); - return a0b3b2b1; -} - -static DRFLAC_INLINE void drflac__calculate_prediction_32_x4__sse41(drflac_uint32 order, drflac_int32 shift, const __m128i* coefficients128, const __m128i riceParamParts128, drflac_int32* pDecodedSamples) -{ - drflac_assert(order <= 32); - - /* I don't think this is as efficient as it could be. More work needs to be done on this. */ - if (order > 0) { - drflac_int32 predictions[4]; - drflac_uint32 riceParamParts[4]; - - __m128i s_09_10_11_12 = _mm_loadu_si128((const __m128i*)(pDecodedSamples - 12)); - __m128i s_05_06_07_08 = _mm_loadu_si128((const __m128i*)(pDecodedSamples - 8)); - __m128i s_01_02_03_04 = _mm_loadu_si128((const __m128i*)(pDecodedSamples - 4)); - - __m128i prediction = _mm_setzero_si128(); - - /* - The idea with this switch is to do do a single jump based on the value of "order". In my test library, "order" is never larger than 12, so - I have decided to do a less optimal, but simpler solution in the order > 12 case. - */ - switch (order) - { - case 32: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[31], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 32)))); - case 31: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[30], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 31)))); - case 30: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[29], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 30)))); - case 29: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[28], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 29)))); - case 28: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[27], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 28)))); - case 27: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[26], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 27)))); - case 26: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[25], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 26)))); - case 25: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[24], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 25)))); - case 24: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[23], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 24)))); - case 23: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[22], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 23)))); - case 22: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[21], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 22)))); - case 21: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[20], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 21)))); - case 20: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[19], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 20)))); - case 19: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[18], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 19)))); - case 18: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[17], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 18)))); - case 17: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[16], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 17)))); - case 16: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[15], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 16)))); - case 15: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[14], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 15)))); - case 14: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[13], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 14)))); - case 13: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[12], _mm_loadu_si128((const __m128i*)(pDecodedSamples - 13)))); - - case 12: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[11], s_09_10_11_12)); - case 11: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[10], drflac__mm_slide3_epi32(s_05_06_07_08, s_09_10_11_12))); - case 10: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 9], drflac__mm_slide2_epi32(s_05_06_07_08, s_09_10_11_12))); - case 9: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 8], drflac__mm_slide1_epi32(s_05_06_07_08, s_09_10_11_12))); - case 8: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 7], s_05_06_07_08)); - case 7: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 6], drflac__mm_slide3_epi32(s_01_02_03_04, s_05_06_07_08))); - case 6: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 5], drflac__mm_slide2_epi32(s_01_02_03_04, s_05_06_07_08))); - case 5: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 4], drflac__mm_slide1_epi32(s_01_02_03_04, s_05_06_07_08))); - case 4: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 3], s_01_02_03_04)); order = 3; /* <-- Don't forget to set order to 3 here! */ - case 3: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 2], drflac__mm_slide3_epi32(_mm_setzero_si128(), s_01_02_03_04))); - case 2: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 1], drflac__mm_slide2_epi32(_mm_setzero_si128(), s_01_02_03_04))); - case 1: prediction = _mm_add_epi32(prediction, _mm_mullo_epi32(coefficients128[ 0], drflac__mm_slide1_epi32(_mm_setzero_si128(), s_01_02_03_04))); - } - - _mm_storeu_si128((__m128i*)predictions, prediction); - _mm_storeu_si128((__m128i*)riceParamParts, riceParamParts128); - - predictions[0] = riceParamParts[0] + (predictions[0] >> shift); - - switch (order) - { - case 3: predictions[3] += ((const drflac_int32*)&coefficients128[ 2])[0] * predictions[ 0]; - case 2: predictions[2] += ((const drflac_int32*)&coefficients128[ 1])[0] * predictions[ 0]; - case 1: predictions[1] += ((const drflac_int32*)&coefficients128[ 0])[0] * predictions[ 0]; - } - predictions[1] = riceParamParts[1] + (predictions[1] >> shift); - - switch (order) - { - case 3: - case 2: predictions[3] += ((const drflac_int32*)&coefficients128[ 1])[0] * predictions[ 1]; - case 1: predictions[2] += ((const drflac_int32*)&coefficients128[ 0])[0] * predictions[ 1]; - } - predictions[2] = riceParamParts[2] + (predictions[2] >> shift); - - switch (order) - { - case 3: - case 2: - case 1: predictions[3] += ((const drflac_int32*)&coefficients128[ 0])[0] * predictions[ 2]; - } - predictions[3] = riceParamParts[3] + (predictions[3] >> shift); - - pDecodedSamples[0] = predictions[0]; - pDecodedSamples[1] = predictions[1]; - pDecodedSamples[2] = predictions[2]; - pDecodedSamples[3] = predictions[3]; - } else { - _mm_storeu_si128((__m128i*)pDecodedSamples, riceParamParts128); - } -} -#endif #if 0 /* @@ -2926,9 +3235,8 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__reference(drfla { drflac_uint32 i; - drflac_assert(bs != NULL); - drflac_assert(count > 0); - drflac_assert(pSamplesOut != NULL); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pSamplesOut != NULL); for (i = 0; i < count; ++i) { drflac_uint32 zeroCounter = 0; @@ -2962,7 +3270,7 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__reference(drfla } - if (bitsPerSample > 16) { + if (bitsPerSample+shift >= 32) { pSamplesOut[i] = decodedRice + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); } else { pSamplesOut[i] = decodedRice + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); @@ -3015,7 +3323,7 @@ static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts(drflac_bs* bs, drflac drflac_uint32 riceParamPart; drflac_uint32 riceLength; - drflac_assert(riceParam > 0); /* <-- riceParam should never be 0. drflac__read_rice_parts__param_equals_zero() should be used instead for this case. */ + DRFLAC_ASSERT(riceParam > 0); /* <-- riceParam should never be 0. drflac__read_rice_parts__param_equals_zero() should be used instead for this case. */ riceParamMask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParam); @@ -3125,8 +3433,8 @@ static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x1(drflac_bs* bs, drf /* Before reloading the cache we need to grab the size in bits of the low part. */ riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; - drflac_assert(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); - + DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); + /* Now reload the cache. */ if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { #ifndef DR_FLAC_NO_CRC @@ -3198,133 +3506,6 @@ static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x1(drflac_bs* bs, drf return DRFLAC_TRUE; } -static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x4(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) -{ - drflac_uint32 riceParamPlus1 = riceParam + 1; - /*drflac_cache_t riceParamPlus1Mask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParamPlus1);*/ - drflac_uint32 riceParamPlus1Shift = DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPlus1); - drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; - - /* - The idea here is to use local variables for the cache in an attempt to encourage the compiler to store them in registers. I have - no idea how this will work in practice... - */ - drflac_cache_t bs_cache = bs->cache; - drflac_uint32 bs_consumedBits = bs->consumedBits; - - /* - What this is doing is trying to efficiently extract 4 rice parts at a time, the idea being that we can exploit certain properties - to our advantage to make things more efficient. - */ - int i; - for (i = 0; i < 4; ++i) { - /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ - drflac_uint32 lzcount = drflac__clz(bs_cache); - if (lzcount < sizeof(bs_cache)*8) { - pZeroCounterOut[i] = lzcount; - - /* - It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting - this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled - outside of this function at a higher level. - */ - extract_rice_param_part: - bs_cache <<= lzcount; - bs_consumedBits += lzcount; - - if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { - /* Getting here means the rice parameter part is wholly contained within the current cache line. */ - pRiceParamPartOut[i] = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); - bs_cache <<= riceParamPlus1; - bs_consumedBits += riceParamPlus1; - } else { - drflac_uint32 riceParamPartHi; - drflac_uint32 riceParamPartLo; - drflac_uint32 riceParamPartLoBitCount; - - /* - Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache - line, reload the cache, and then combine it with the head of the next cache line. - */ - - /* Grab the high part of the rice parameter part. */ - riceParamPartHi = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); - - /* Before reloading the cache we need to grab the size in bits of the low part. */ - riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; - - /* Now reload the cache. */ - if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { - #ifndef DR_FLAC_NO_CRC - drflac__update_crc16(bs); - #endif - bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); - bs_consumedBits = riceParamPartLoBitCount; - #ifndef DR_FLAC_NO_CRC - bs->crc16Cache = bs_cache; - #endif - } else { - /* Slow path. We need to fetch more data from the client. */ - if (!drflac__reload_cache(bs)) { - return DRFLAC_FALSE; - } - - bs_cache = bs->cache; - bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; - } - - /* We should now have enough information to construct the rice parameter part. */ - riceParamPartLo = (drflac_uint32)(bs_cache >> (DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPartLoBitCount))); - pRiceParamPartOut[i] = riceParamPartHi | riceParamPartLo; - - bs_cache <<= riceParamPartLoBitCount; - } - } else { - /* - Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call - to drflac__clz() and we need to reload the cache. - */ - drflac_uint32 zeroCounter = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BITS(bs) - bs_consumedBits); - for (;;) { - if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { - #ifndef DR_FLAC_NO_CRC - drflac__update_crc16(bs); - #endif - bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); - bs_consumedBits = 0; - #ifndef DR_FLAC_NO_CRC - bs->crc16Cache = bs_cache; - #endif - } else { - /* Slow path. We need to fetch more data from the client. */ - if (!drflac__reload_cache(bs)) { - return DRFLAC_FALSE; - } - - bs_cache = bs->cache; - bs_consumedBits = bs->consumedBits; - } - - lzcount = drflac__clz(bs_cache); - zeroCounter += lzcount; - - if (lzcount < sizeof(bs_cache)*8) { - break; - } - } - - pZeroCounterOut[i] = zeroCounter; - goto extract_rice_param_part; - } - } - - /* Make sure the cache is restored at the end of it all. */ - bs->cache = bs_cache; - bs->consumedBits = bs_consumedBits; - - return DRFLAC_TRUE; -} - static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac_uint8 riceParam) { drflac_uint32 riceParamPlus1 = riceParam + 1; @@ -3361,8 +3542,8 @@ static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac /* Before reloading the cache we need to grab the size in bits of the low part. */ drflac_uint32 riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; - drflac_assert(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); - + DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); + /* Now reload the cache. */ if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { #ifndef DR_FLAC_NO_CRC @@ -3427,29 +3608,70 @@ static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac } -static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar_zeroorder(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; drflac_uint32 zeroCountPart0; - drflac_uint32 zeroCountPart1; - drflac_uint32 zeroCountPart2; - drflac_uint32 zeroCountPart3; drflac_uint32 riceParamPart0; - drflac_uint32 riceParamPart1; - drflac_uint32 riceParamPart2; - drflac_uint32 riceParamPart3; + drflac_uint32 riceParamMask; + drflac_uint32 i; + + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pSamplesOut != NULL); + + (void)bitsPerSample; + (void)order; + (void)shift; + (void)coefficients; + + riceParamMask = (drflac_uint32)~((~0UL) << riceParam); + + i = 0; + while (i < count) { + /* Rice extraction. */ + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { + return DRFLAC_FALSE; + } + + /* Rice reconstruction. */ + riceParamPart0 &= riceParamMask; + riceParamPart0 |= (zeroCountPart0 << riceParam); + riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; + + pSamplesOut[i] = riceParamPart0; + + i += 1; + } + + return DRFLAC_TRUE; +} + +static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +{ + drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; + drflac_uint32 zeroCountPart0 = 0; + drflac_uint32 zeroCountPart1 = 0; + drflac_uint32 zeroCountPart2 = 0; + drflac_uint32 zeroCountPart3 = 0; + drflac_uint32 riceParamPart0 = 0; + drflac_uint32 riceParamPart1 = 0; + drflac_uint32 riceParamPart2 = 0; + drflac_uint32 riceParamPart3 = 0; drflac_uint32 riceParamMask; const drflac_int32* pSamplesOutEnd; drflac_uint32 i; - drflac_assert(bs != NULL); - drflac_assert(count > 0); - drflac_assert(pSamplesOut != NULL); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pSamplesOut != NULL); + + if (order == 0) { + return drflac__decode_samples_with_residual__rice__scalar_zeroorder(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); + } - riceParamMask = ~((~0UL) << riceParam); - pSamplesOutEnd = pSamplesOut + ((count >> 2) << 2); + riceParamMask = (drflac_uint32)~((~0UL) << riceParam); + pSamplesOutEnd = pSamplesOut + (count & ~3); - if (bitsPerSample >= 24) { + if (bitsPerSample+shift > 32) { while (pSamplesOut < pSamplesOutEnd) { /* Rice extraction. It's faster to do this one at a time against local variables than it is to use the x4 version @@ -3517,7 +3739,7 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_b } } - i = ((count >> 2) << 2); + i = (count & ~3); while (i < count) { /* Rice extraction. */ if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { @@ -3531,7 +3753,7 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_b /*riceParamPart0 = (riceParamPart0 >> 1) ^ (~(riceParamPart0 & 0x01) + 1);*/ /* Sample reconstruction. */ - if (bitsPerSample >= 24) { + if (bitsPerSample+shift > 32) { pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); } else { pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); @@ -3540,136 +3762,246 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_b i += 1; pSamplesOut += 1; } - + return DRFLAC_TRUE; } +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE __m128i drflac__mm_packs_interleaved_epi32(__m128i a, __m128i b) +{ + __m128i r; + + /* Pack. */ + r = _mm_packs_epi32(a, b); + + /* a3a2 a1a0 b3b2 b1b0 -> a3a2 b3b2 a1a0 b1b0 */ + r = _mm_shuffle_epi32(r, _MM_SHUFFLE(3, 1, 2, 0)); + + /* a3a2 b3b2 a1a0 b1b0 -> a3b3 a2b2 a1b1 a0b0 */ + r = _mm_shufflehi_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); + r = _mm_shufflelo_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); + + return r; +} +#endif + #if defined(DRFLAC_SUPPORT_SSE41) -static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +static DRFLAC_INLINE __m128i drflac__mm_not_si128(__m128i a) { - static drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; + return _mm_xor_si128(a, _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())); +} - /*drflac_uint32 zeroCountParts[4];*/ - /*drflac_uint32 riceParamParts[4];*/ +static DRFLAC_INLINE __m128i drflac__mm_hadd_epi32(__m128i x) +{ + __m128i x64 = _mm_add_epi32(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); + __m128i x32 = _mm_shufflelo_epi16(x64, _MM_SHUFFLE(1, 0, 3, 2)); + return _mm_add_epi32(x64, x32); +} - drflac_uint32 zeroCountParts0; - drflac_uint32 zeroCountParts1; - drflac_uint32 zeroCountParts2; - drflac_uint32 zeroCountParts3; - drflac_uint32 riceParamParts0; - drflac_uint32 riceParamParts1; - drflac_uint32 riceParamParts2; - drflac_uint32 riceParamParts3; - drflac_uint32 riceParamMask; - const drflac_int32* pSamplesOutEnd; - __m128i riceParamMask128; - __m128i one; - drflac_uint32 i; +static DRFLAC_INLINE __m128i drflac__mm_hadd_epi64(__m128i x) +{ + return _mm_add_epi64(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); +} - drflac_assert(bs != NULL); - drflac_assert(count > 0); - drflac_assert(pSamplesOut != NULL); +static DRFLAC_INLINE __m128i drflac__mm_srai_epi64(__m128i x, int count) +{ + /* + To simplify this we are assuming count < 32. This restriction allows us to work on a low side and a high side. The low side + is shifted with zero bits, whereas the right side is shifted with sign bits. + */ + __m128i lo = _mm_srli_epi64(x, count); + __m128i hi = _mm_srai_epi32(x, count); - riceParamMask = ~((~0UL) << riceParam); - riceParamMask128 = _mm_set1_epi32(riceParamMask); - one = _mm_set1_epi32(0x01); + hi = _mm_and_si128(hi, _mm_set_epi32(0xFFFFFFFF, 0, 0xFFFFFFFF, 0)); /* The high part needs to have the low part cleared. */ - pSamplesOutEnd = pSamplesOut + ((count >> 2) << 2); + return _mm_or_si128(lo, hi); +} - if (bitsPerSample >= 24) { - while (pSamplesOut < pSamplesOutEnd) { - __m128i zeroCountPart128; - __m128i riceParamPart128; - drflac_uint32 riceParamParts[4]; - - /* Rice extraction. */ - if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { - return DRFLAC_FALSE; - } +static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41_32(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +{ + int i; + drflac_uint32 riceParamMask; + drflac_int32* pDecodedSamples = pSamplesOut; + drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); + drflac_uint32 zeroCountParts0 = 0; + drflac_uint32 zeroCountParts1 = 0; + drflac_uint32 zeroCountParts2 = 0; + drflac_uint32 zeroCountParts3 = 0; + drflac_uint32 riceParamParts0 = 0; + drflac_uint32 riceParamParts1 = 0; + drflac_uint32 riceParamParts2 = 0; + drflac_uint32 riceParamParts3 = 0; + __m128i coefficients128_0; + __m128i coefficients128_4; + __m128i coefficients128_8; + __m128i samples128_0; + __m128i samples128_4; + __m128i samples128_8; + __m128i riceParamMask128; - zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); - riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); + const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; - riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); - riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); - riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_mullo_epi32(_mm_and_si128(riceParamPart128, one), _mm_set1_epi32(0xFFFFFFFF))); /* <-- Only supported from SSE4.1 */ - /*riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_add_epi32(drflac__mm_not_si128(_mm_and_si128(riceParamPart128, one)), one));*/ /* <-- SSE2 compatible */ + riceParamMask = (drflac_uint32)~((~0UL) << riceParam); + riceParamMask128 = _mm_set1_epi32(riceParamMask); - _mm_storeu_si128((__m128i*)riceParamParts, riceParamPart128); + /* Pre-load. */ + coefficients128_0 = _mm_setzero_si128(); + coefficients128_4 = _mm_setzero_si128(); + coefficients128_8 = _mm_setzero_si128(); - #if defined(DRFLAC_64BIT) - /* The scalar implementation seems to be faster on 64-bit in my testing. */ - drflac__calculate_prediction_64_x4(order, shift, coefficients, riceParamParts, pSamplesOut); - #else - pSamplesOut[0] = riceParamParts[0] + drflac__calculate_prediction_64__sse41(order, shift, coefficients, pSamplesOut + 0); - pSamplesOut[1] = riceParamParts[1] + drflac__calculate_prediction_64__sse41(order, shift, coefficients, pSamplesOut + 1); - pSamplesOut[2] = riceParamParts[2] + drflac__calculate_prediction_64__sse41(order, shift, coefficients, pSamplesOut + 2); - pSamplesOut[3] = riceParamParts[3] + drflac__calculate_prediction_64__sse41(order, shift, coefficients, pSamplesOut + 3); - #endif + samples128_0 = _mm_setzero_si128(); + samples128_4 = _mm_setzero_si128(); + samples128_8 = _mm_setzero_si128(); - pSamplesOut += 4; - } - } else { - drflac_int32 coefficientsUnaligned[32*4 + 4] = {0}; - drflac_int32* coefficients128 = (drflac_int32*)(((size_t)coefficientsUnaligned + 15) & ~15); + /* + Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than + what's available in the input buffers. It would be convenient to use a fall-through switch to do this, but this results + in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted + so I think there's opportunity for this to be simplified. + */ +#if 1 + { + int runningOrder = order; - for (i = 0; i < order; ++i) { - coefficients128[i*4+0] = coefficients[i]; - coefficients128[i*4+1] = coefficients[i]; - coefficients128[i*4+2] = coefficients[i]; - coefficients128[i*4+3] = coefficients[i]; + /* 0 - 3. */ + if (runningOrder >= 4) { + coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); + samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: coefficients128_0 = _mm_set_epi32(0, coefficients[2], coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], pSamplesOut[-3], 0); break; + case 2: coefficients128_0 = _mm_set_epi32(0, 0, coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], 0, 0); break; + case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; + } + runningOrder = 0; } - while (pSamplesOut < pSamplesOutEnd) { - __m128i zeroCountPart128; - __m128i riceParamPart128; - /*drflac_int32 riceParamParts[4];*/ + /* 4 - 7 */ + if (runningOrder >= 4) { + coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); + samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: coefficients128_4 = _mm_set_epi32(0, coefficients[6], coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], pSamplesOut[-7], 0); break; + case 2: coefficients128_4 = _mm_set_epi32(0, 0, coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], 0, 0); break; + case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; + } + runningOrder = 0; + } - /* Rice extraction. */ -#if 1 - if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || - !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { - return DRFLAC_FALSE; + /* 8 - 11 */ + if (runningOrder == 4) { + coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); + samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: coefficients128_8 = _mm_set_epi32(0, coefficients[10], coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], pSamplesOut[-11], 0); break; + case 2: coefficients128_8 = _mm_set_epi32(0, 0, coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], 0, 0); break; + case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; } + runningOrder = 0; + } - zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); - riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); + /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ + coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); + coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); + coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); + } #else - if (!drflac__read_rice_parts_x4(bs, riceParam, zeroCountParts, riceParamParts)) { - return DRFLAC_FALSE; - } + /* This causes strict-aliasing warnings with GCC. */ + switch (order) + { + case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; + case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; + case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; + case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; + case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; + case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; + case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; + case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; + case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; + case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; + case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; + case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; + } +#endif + + /* For this version we are doing one sample at a time. */ + while (pDecodedSamples < pDecodedSamplesEnd) { + __m128i prediction128; + __m128i zeroCountPart128; + __m128i riceParamPart128; + + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { + return DRFLAC_FALSE; + } - zeroCountPart128 = _mm_set_epi32(zeroCountParts[3], zeroCountParts[2], zeroCountParts[1], zeroCountParts[0]); - riceParamPart128 = _mm_set_epi32(riceParamParts[3], riceParamParts[2], riceParamParts[1], riceParamParts[0]); -#endif + zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); + riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); - riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); - riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); - riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_mullo_epi32(_mm_and_si128(riceParamPart128, one), _mm_set1_epi32(0xFFFFFFFF))); + riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); + riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); + riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_add_epi32(drflac__mm_not_si128(_mm_and_si128(riceParamPart128, _mm_set1_epi32(0x01))), _mm_set1_epi32(0x01))); /* <-- SSE2 compatible */ + /*riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_mullo_epi32(_mm_and_si128(riceParamPart128, _mm_set1_epi32(0x01)), _mm_set1_epi32(0xFFFFFFFF)));*/ /* <-- Only supported from SSE4.1 and is slower in my testing... */ -#if 1 - drflac__calculate_prediction_32_x4__sse41(order, shift, (const __m128i*)coefficients128, riceParamPart128, pSamplesOut); -#else - _mm_storeu_si128((__m128i*)riceParamParts, riceParamPart128); + if (order <= 4) { + for (i = 0; i < 4; i += 1) { + prediction128 = _mm_mullo_epi32(coefficients128_0, samples128_0); - pSamplesOut[0] = riceParamParts[0] + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); - pSamplesOut[1] = riceParamParts[1] + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 1); - pSamplesOut[2] = riceParamParts[2] + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 2); - pSamplesOut[3] = riceParamParts[3] + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 3); -#endif + /* Horizontal add and shift. */ + prediction128 = drflac__mm_hadd_epi32(prediction128); + prediction128 = _mm_srai_epi32(prediction128, shift); + prediction128 = _mm_add_epi32(riceParamPart128, prediction128); - pSamplesOut += 4; + samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); + riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); + } + } else if (order <= 8) { + for (i = 0; i < 4; i += 1) { + prediction128 = _mm_mullo_epi32(coefficients128_4, samples128_4); + prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); + + /* Horizontal add and shift. */ + prediction128 = drflac__mm_hadd_epi32(prediction128); + prediction128 = _mm_srai_epi32(prediction128, shift); + prediction128 = _mm_add_epi32(riceParamPart128, prediction128); + + samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); + samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); + riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); + } + } else { + for (i = 0; i < 4; i += 1) { + prediction128 = _mm_mullo_epi32(coefficients128_8, samples128_8); + prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_4, samples128_4)); + prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); + + /* Horizontal add and shift. */ + prediction128 = drflac__mm_hadd_epi32(prediction128); + prediction128 = _mm_srai_epi32(prediction128, shift); + prediction128 = _mm_add_epi32(riceParamPart128, prediction128); + + samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); + samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); + samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); + riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); + } } - } + /* We store samples in groups of 4. */ + _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); + pDecodedSamples += 4; + } - i = ((count >> 2) << 2); - while (i < count) { + /* Make sure we process the last few samples. */ + i = (count & ~3); + while (i < (int)count) { /* Rice extraction. */ if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { return DRFLAC_FALSE; @@ -3681,3567 +4013,6625 @@ static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41(drflac_bs riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; /* Sample reconstruction. */ - if (bitsPerSample >= 24) { - pSamplesOut[0] = riceParamParts0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); - } else { - pSamplesOut[0] = riceParamParts0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); - } + pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); i += 1; - pSamplesOut += 1; + pDecodedSamples += 1; } return DRFLAC_TRUE; } -#endif -static drflac_bool32 drflac__decode_samples_with_residual__rice(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41_64(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { -#if defined(DRFLAC_SUPPORT_SSE41) - if (drflac__gIsSSE41Supported) { - return drflac__decode_samples_with_residual__rice__sse41(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); - } else -#endif - { - /* Scalar fallback. */ - #if 0 - return drflac__decode_samples_with_residual__rice__reference(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); - #else - return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); - #endif - } -} + int i; + drflac_uint32 riceParamMask; + drflac_int32* pDecodedSamples = pSamplesOut; + drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); + drflac_uint32 zeroCountParts0 = 0; + drflac_uint32 zeroCountParts1 = 0; + drflac_uint32 zeroCountParts2 = 0; + drflac_uint32 zeroCountParts3 = 0; + drflac_uint32 riceParamParts0 = 0; + drflac_uint32 riceParamParts1 = 0; + drflac_uint32 riceParamParts2 = 0; + drflac_uint32 riceParamParts3 = 0; + __m128i coefficients128_0; + __m128i coefficients128_4; + __m128i coefficients128_8; + __m128i samples128_0; + __m128i samples128_4; + __m128i samples128_8; + __m128i prediction128; + __m128i riceParamMask128; -/* Reads and seeks past a string of residual values as Rice codes. The decoder should be sitting on the first bit of the Rice codes. */ -static drflac_bool32 drflac__read_and_seek_residual__rice(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam) -{ - drflac_uint32 i; + const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; - drflac_assert(bs != NULL); - drflac_assert(count > 0); + DRFLAC_ASSERT(order <= 12); - for (i = 0; i < count; ++i) { - if (!drflac__seek_rice_parts(bs, riceParam)) { - return DRFLAC_FALSE; - } - } + riceParamMask = (drflac_uint32)~((~0UL) << riceParam); + riceParamMask128 = _mm_set1_epi32(riceParamMask); - return DRFLAC_TRUE; -} + prediction128 = _mm_setzero_si128(); -static drflac_bool32 drflac__decode_samples_with_residual__unencoded(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 unencodedBitsPerSample, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) -{ - drflac_uint32 i; + /* Pre-load. */ + coefficients128_0 = _mm_setzero_si128(); + coefficients128_4 = _mm_setzero_si128(); + coefficients128_8 = _mm_setzero_si128(); - drflac_assert(bs != NULL); - drflac_assert(count > 0); - drflac_assert(unencodedBitsPerSample <= 31); /* <-- unencodedBitsPerSample is a 5 bit number, so cannot exceed 31. */ - drflac_assert(pSamplesOut != NULL); + samples128_0 = _mm_setzero_si128(); + samples128_4 = _mm_setzero_si128(); + samples128_8 = _mm_setzero_si128(); - for (i = 0; i < count; ++i) { - if (unencodedBitsPerSample > 0) { - if (!drflac__read_int32(bs, unencodedBitsPerSample, pSamplesOut + i)) { - return DRFLAC_FALSE; - } +#if 1 + { + int runningOrder = order; + + /* 0 - 3. */ + if (runningOrder >= 4) { + coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); + samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); + runningOrder -= 4; } else { - pSamplesOut[i] = 0; + switch (runningOrder) { + case 3: coefficients128_0 = _mm_set_epi32(0, coefficients[2], coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], pSamplesOut[-3], 0); break; + case 2: coefficients128_0 = _mm_set_epi32(0, 0, coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], 0, 0); break; + case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; + } + runningOrder = 0; } - if (bitsPerSample > 16) { - pSamplesOut[i] += drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); + /* 4 - 7 */ + if (runningOrder >= 4) { + coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); + samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); + runningOrder -= 4; } else { - pSamplesOut[i] += drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); + switch (runningOrder) { + case 3: coefficients128_4 = _mm_set_epi32(0, coefficients[6], coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], pSamplesOut[-7], 0); break; + case 2: coefficients128_4 = _mm_set_epi32(0, 0, coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], 0, 0); break; + case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; + } + runningOrder = 0; } - } - return DRFLAC_TRUE; -} + /* 8 - 11 */ + if (runningOrder == 4) { + coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); + samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: coefficients128_8 = _mm_set_epi32(0, coefficients[10], coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], pSamplesOut[-11], 0); break; + case 2: coefficients128_8 = _mm_set_epi32(0, 0, coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], 0, 0); break; + case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; + } + runningOrder = 0; + } + /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ + coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); + coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); + coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); + } +#else + switch (order) + { + case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; + case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; + case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; + case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; + case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; + case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; + case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; + case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; + case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; + case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; + case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; + case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; + } +#endif + + /* For this version we are doing one sample at a time. */ + while (pDecodedSamples < pDecodedSamplesEnd) { + __m128i zeroCountPart128; + __m128i riceParamPart128; + + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { + return DRFLAC_FALSE; + } -/* -Reads and decodes the residual for the sub-frame the decoder is currently sitting on. This function should be called -when the decoder is sitting at the very start of the RESIDUAL block. The first residuals will be ignored. The - and parameters are used to determine how many residual values need to be decoded. -*/ -static drflac_bool32 drflac__decode_samples_with_residual(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 blockSize, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) -{ - drflac_uint8 residualMethod; - drflac_uint8 partitionOrder; - drflac_uint32 samplesInPartition; - drflac_uint32 partitionsRemaining; + zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); + riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); - drflac_assert(bs != NULL); - drflac_assert(blockSize != 0); - drflac_assert(pDecodedSamples != NULL); /* <-- Should we allow NULL, in which case we just seek past the residual rather than do a full decode? */ + riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); + riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); + riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_add_epi32(drflac__mm_not_si128(_mm_and_si128(riceParamPart128, _mm_set1_epi32(1))), _mm_set1_epi32(1))); - if (!drflac__read_uint8(bs, 2, &residualMethod)) { - return DRFLAC_FALSE; - } + for (i = 0; i < 4; i += 1) { + prediction128 = _mm_xor_si128(prediction128, prediction128); /* Reset to 0. */ - if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { - return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ - } + switch (order) + { + case 12: + case 11: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_8, _MM_SHUFFLE(1, 1, 0, 0)))); + case 10: + case 9: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_8, _MM_SHUFFLE(3, 3, 2, 2)))); + case 8: + case 7: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_4, _MM_SHUFFLE(1, 1, 0, 0)))); + case 6: + case 5: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_4, _MM_SHUFFLE(3, 3, 2, 2)))); + case 4: + case 3: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_0, _MM_SHUFFLE(1, 1, 0, 0)))); + case 2: + case 1: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_0, _MM_SHUFFLE(3, 3, 2, 2)))); + } - /* Ignore the first values. */ - pDecodedSamples += order; + /* Horizontal add and shift. */ + prediction128 = drflac__mm_hadd_epi64(prediction128); + prediction128 = drflac__mm_srai_epi64(prediction128, shift); + prediction128 = _mm_add_epi32(riceParamPart128, prediction128); - if (!drflac__read_uint8(bs, 4, &partitionOrder)) { - return DRFLAC_FALSE; - } + /* Our value should be sitting in prediction128[0]. We need to combine this with our SSE samples. */ + samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); + samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); + samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); - /* - From the FLAC spec: - The Rice partition order in a Rice-coded residual section must be less than or equal to 8. - */ - if (partitionOrder > 8) { - return DRFLAC_FALSE; - } + /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ + riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); + } - /* Validation check. */ - if ((blockSize / (1 << partitionOrder)) <= order) { - return DRFLAC_FALSE; + /* We store samples in groups of 4. */ + _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); + pDecodedSamples += 4; } - samplesInPartition = (blockSize / (1 << partitionOrder)) - order; - partitionsRemaining = (1 << partitionOrder); - for (;;) { - drflac_uint8 riceParam = 0; - if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { - if (!drflac__read_uint8(bs, 4, &riceParam)) { - return DRFLAC_FALSE; - } - if (riceParam == 15) { - riceParam = 0xFF; - } - } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { - if (!drflac__read_uint8(bs, 5, &riceParam)) { - return DRFLAC_FALSE; - } - if (riceParam == 31) { - riceParam = 0xFF; - } + /* Make sure we process the last few samples. */ + i = (count & ~3); + while (i < (int)count) { + /* Rice extraction. */ + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { + return DRFLAC_FALSE; } - if (riceParam != 0xFF) { - if (!drflac__decode_samples_with_residual__rice(bs, bitsPerSample, samplesInPartition, riceParam, order, shift, coefficients, pDecodedSamples)) { - return DRFLAC_FALSE; - } - } else { - unsigned char unencodedBitsPerSample = 0; - if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { - return DRFLAC_FALSE; - } + /* Rice reconstruction. */ + riceParamParts0 &= riceParamMask; + riceParamParts0 |= (zeroCountParts0 << riceParam); + riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; - if (!drflac__decode_samples_with_residual__unencoded(bs, bitsPerSample, samplesInPartition, unencodedBitsPerSample, order, shift, coefficients, pDecodedSamples)) { - return DRFLAC_FALSE; - } - } + /* Sample reconstruction. */ + pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); - pDecodedSamples += samplesInPartition; + i += 1; + pDecodedSamples += 1; + } - if (partitionsRemaining == 1) { - break; - } + return DRFLAC_TRUE; +} - partitionsRemaining -= 1; +static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +{ + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pSamplesOut != NULL); - if (partitionOrder != 0) { - samplesInPartition = blockSize / (1 << partitionOrder); + /* In my testing the order is rarely > 12, so in this case I'm going to simplify the SSE implementation by only handling order <= 12. */ + if (order > 0 && order <= 12) { + if (bitsPerSample+shift > 32) { + return drflac__decode_samples_with_residual__rice__sse41_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); + } else { + return drflac__decode_samples_with_residual__rice__sse41_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); } + } else { + return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); } +} +#endif - return DRFLAC_TRUE; +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac__vst2q_s32(drflac_int32* p, int32x4x2_t x) +{ + vst1q_s32(p+0, x.val[0]); + vst1q_s32(p+4, x.val[1]); } -/* -Reads and seeks past the residual for the sub-frame the decoder is currently sitting on. This function should be called -when the decoder is sitting at the very start of the RESIDUAL block. The first residuals will be set to 0. The - and parameters are used to determine how many residual values need to be decoded. -*/ -static drflac_bool32 drflac__read_and_seek_residual(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 order) +static DRFLAC_INLINE void drflac__vst2q_u32(drflac_uint32* p, uint32x4x2_t x) { - drflac_uint8 residualMethod; - drflac_uint8 partitionOrder; - drflac_uint32 samplesInPartition; - drflac_uint32 partitionsRemaining; + vst1q_u32(p+0, x.val[0]); + vst1q_u32(p+4, x.val[1]); +} - drflac_assert(bs != NULL); - drflac_assert(blockSize != 0); +static DRFLAC_INLINE void drflac__vst2q_f32(float* p, float32x4x2_t x) +{ + vst1q_f32(p+0, x.val[0]); + vst1q_f32(p+4, x.val[1]); +} - if (!drflac__read_uint8(bs, 2, &residualMethod)) { - return DRFLAC_FALSE; - } +static DRFLAC_INLINE void drflac__vst2q_s16(drflac_int16* p, int16x4x2_t x) +{ + vst1q_s16(p, vcombine_s16(x.val[0], x.val[1])); +} - if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { - return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ - } +static DRFLAC_INLINE void drflac__vst2q_u16(drflac_uint16* p, uint16x4x2_t x) +{ + vst1q_u16(p, vcombine_u16(x.val[0], x.val[1])); +} - if (!drflac__read_uint8(bs, 4, &partitionOrder)) { - return DRFLAC_FALSE; - } +static DRFLAC_INLINE int32x4_t drflac__vdupq_n_s32x4(drflac_int32 x3, drflac_int32 x2, drflac_int32 x1, drflac_int32 x0) +{ + drflac_int32 x[4]; + x[3] = x3; + x[2] = x2; + x[1] = x1; + x[0] = x0; + return vld1q_s32(x); +} - /* - From the FLAC spec: - The Rice partition order in a Rice-coded residual section must be less than or equal to 8. - */ - if (partitionOrder > 8) { - return DRFLAC_FALSE; - } +static DRFLAC_INLINE int32x4_t drflac__valignrq_s32_1(int32x4_t a, int32x4_t b) +{ + /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ - /* Validation check. */ - if ((blockSize / (1 << partitionOrder)) <= order) { - return DRFLAC_FALSE; - } + /* Reference */ + /*return drflac__vdupq_n_s32x4( + vgetq_lane_s32(a, 0), + vgetq_lane_s32(b, 3), + vgetq_lane_s32(b, 2), + vgetq_lane_s32(b, 1) + );*/ - samplesInPartition = (blockSize / (1 << partitionOrder)) - order; - partitionsRemaining = (1 << partitionOrder); - for (;;) - { - drflac_uint8 riceParam = 0; - if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { - if (!drflac__read_uint8(bs, 4, &riceParam)) { - return DRFLAC_FALSE; - } - if (riceParam == 15) { - riceParam = 0xFF; - } - } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { - if (!drflac__read_uint8(bs, 5, &riceParam)) { - return DRFLAC_FALSE; - } - if (riceParam == 31) { - riceParam = 0xFF; - } - } + return vextq_s32(b, a, 1); +} - if (riceParam != 0xFF) { - if (!drflac__read_and_seek_residual__rice(bs, samplesInPartition, riceParam)) { - return DRFLAC_FALSE; - } - } else { - unsigned char unencodedBitsPerSample = 0; - if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { - return DRFLAC_FALSE; - } +static DRFLAC_INLINE uint32x4_t drflac__valignrq_u32_1(uint32x4_t a, uint32x4_t b) +{ + /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ - if (!drflac__seek_bits(bs, unencodedBitsPerSample * samplesInPartition)) { - return DRFLAC_FALSE; - } - } + /* Reference */ + /*return drflac__vdupq_n_s32x4( + vgetq_lane_s32(a, 0), + vgetq_lane_s32(b, 3), + vgetq_lane_s32(b, 2), + vgetq_lane_s32(b, 1) + );*/ + return vextq_u32(b, a, 1); +} - if (partitionsRemaining == 1) { - break; - } +static DRFLAC_INLINE int32x2_t drflac__vhaddq_s32(int32x4_t x) +{ + /* The sum must end up in position 0. */ - partitionsRemaining -= 1; - samplesInPartition = blockSize / (1 << partitionOrder); - } + /* Reference */ + /*return vdupq_n_s32( + vgetq_lane_s32(x, 3) + + vgetq_lane_s32(x, 2) + + vgetq_lane_s32(x, 1) + + vgetq_lane_s32(x, 0) + );*/ - return DRFLAC_TRUE; + int32x2_t r = vadd_s32(vget_high_s32(x), vget_low_s32(x)); + return vpadd_s32(r, r); } +static DRFLAC_INLINE int64x1_t drflac__vhaddq_s64(int64x2_t x) +{ + return vadd_s64(vget_high_s64(x), vget_low_s64(x)); +} -static drflac_bool32 drflac__decode_samples__constant(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_int32* pDecodedSamples) +static DRFLAC_INLINE int32x4_t drflac__vrevq_s32(int32x4_t x) { - drflac_uint32 i; + /* Reference */ + /*return drflac__vdupq_n_s32x4( + vgetq_lane_s32(x, 0), + vgetq_lane_s32(x, 1), + vgetq_lane_s32(x, 2), + vgetq_lane_s32(x, 3) + );*/ - /* Only a single sample needs to be decoded here. */ - drflac_int32 sample; - if (!drflac__read_int32(bs, bitsPerSample, &sample)) { - return DRFLAC_FALSE; - } + return vrev64q_s32(vcombine_s32(vget_high_s32(x), vget_low_s32(x))); +} - /* - We don't really need to expand this, but it does simplify the process of reading samples. If this becomes a performance issue (unlikely) - we'll want to look at a more efficient way. - */ - for (i = 0; i < blockSize; ++i) { - pDecodedSamples[i] = sample; - } +static DRFLAC_INLINE int32x4_t drflac__vnotq_s32(int32x4_t x) +{ + return veorq_s32(x, vdupq_n_s32(0xFFFFFFFF)); +} - return DRFLAC_TRUE; +static DRFLAC_INLINE uint32x4_t drflac__vnotq_u32(uint32x4_t x) +{ + return veorq_u32(x, vdupq_n_u32(0xFFFFFFFF)); } -static drflac_bool32 drflac__decode_samples__verbatim(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_int32* pDecodedSamples) +static drflac_bool32 drflac__decode_samples_with_residual__rice__neon_32(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { - drflac_uint32 i; + int i; + drflac_uint32 riceParamMask; + drflac_int32* pDecodedSamples = pSamplesOut; + drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); + drflac_uint32 zeroCountParts[4]; + drflac_uint32 riceParamParts[4]; + int32x4_t coefficients128_0; + int32x4_t coefficients128_4; + int32x4_t coefficients128_8; + int32x4_t samples128_0; + int32x4_t samples128_4; + int32x4_t samples128_8; + uint32x4_t riceParamMask128; + int32x4_t riceParam128; + int32x2_t shift64; + uint32x4_t one128; + + const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; + + riceParamMask = ~((~0UL) << riceParam); + riceParamMask128 = vdupq_n_u32(riceParamMask); + + riceParam128 = vdupq_n_s32(riceParam); + shift64 = vdup_n_s32(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ + one128 = vdupq_n_u32(1); - for (i = 0; i < blockSize; ++i) { - drflac_int32 sample; - if (!drflac__read_int32(bs, bitsPerSample, &sample)) { - return DRFLAC_FALSE; - } + /* + Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than + what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results + in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted + so I think there's opportunity for this to be simplified. + */ + { + int runningOrder = order; + drflac_int32 tempC[4] = {0, 0, 0, 0}; + drflac_int32 tempS[4] = {0, 0, 0, 0}; + + /* 0 - 3. */ + if (runningOrder >= 4) { + coefficients128_0 = vld1q_s32(coefficients + 0); + samples128_0 = vld1q_s32(pSamplesOut - 4); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ + case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ + case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ + } - pDecodedSamples[i] = sample; - } + coefficients128_0 = vld1q_s32(tempC); + samples128_0 = vld1q_s32(tempS); + runningOrder = 0; + } - return DRFLAC_TRUE; -} + /* 4 - 7 */ + if (runningOrder >= 4) { + coefficients128_4 = vld1q_s32(coefficients + 4); + samples128_4 = vld1q_s32(pSamplesOut - 8); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ + case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ + case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ + } -static drflac_bool32 drflac__decode_samples__fixed(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) -{ - drflac_uint32 i; + coefficients128_4 = vld1q_s32(tempC); + samples128_4 = vld1q_s32(tempS); + runningOrder = 0; + } - static drflac_int32 lpcCoefficientsTable[5][4] = { - {0, 0, 0, 0}, - {1, 0, 0, 0}, - {2, -1, 0, 0}, - {3, -3, 1, 0}, - {4, -6, 4, -1} - }; + /* 8 - 11 */ + if (runningOrder == 4) { + coefficients128_8 = vld1q_s32(coefficients + 8); + samples128_8 = vld1q_s32(pSamplesOut - 12); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ + case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ + case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ + } - /* Warm up samples and coefficients. */ - for (i = 0; i < lpcOrder; ++i) { - drflac_int32 sample; - if (!drflac__read_int32(bs, bitsPerSample, &sample)) { - return DRFLAC_FALSE; + coefficients128_8 = vld1q_s32(tempC); + samples128_8 = vld1q_s32(tempS); + runningOrder = 0; } - pDecodedSamples[i] = sample; - } - - if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, 0, lpcCoefficientsTable[lpcOrder], pDecodedSamples)) { - return DRFLAC_FALSE; + /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ + coefficients128_0 = drflac__vrevq_s32(coefficients128_0); + coefficients128_4 = drflac__vrevq_s32(coefficients128_4); + coefficients128_8 = drflac__vrevq_s32(coefficients128_8); } - return DRFLAC_TRUE; -} - -static drflac_bool32 drflac__decode_samples__lpc(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) -{ - drflac_uint8 i; - drflac_uint8 lpcPrecision; - drflac_int8 lpcShift; - drflac_int32 coefficients[32]; + /* For this version we are doing one sample at a time. */ + while (pDecodedSamples < pDecodedSamplesEnd) { + int32x4_t prediction128; + int32x2_t prediction64; + uint32x4_t zeroCountPart128; + uint32x4_t riceParamPart128; - /* Warm up samples. */ - for (i = 0; i < lpcOrder; ++i) { - drflac_int32 sample; - if (!drflac__read_int32(bs, bitsPerSample, &sample)) { + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { return DRFLAC_FALSE; } - pDecodedSamples[i] = sample; - } + zeroCountPart128 = vld1q_u32(zeroCountParts); + riceParamPart128 = vld1q_u32(riceParamParts); - if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { - return DRFLAC_FALSE; - } - if (lpcPrecision == 15) { - return DRFLAC_FALSE; /* Invalid. */ - } - lpcPrecision += 1; + riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); + riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); + riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); - if (!drflac__read_int8(bs, 5, &lpcShift)) { - return DRFLAC_FALSE; + if (order <= 4) { + for (i = 0; i < 4; i += 1) { + prediction128 = vmulq_s32(coefficients128_0, samples128_0); + + /* Horizontal add and shift. */ + prediction64 = drflac__vhaddq_s32(prediction128); + prediction64 = vshl_s32(prediction64, shift64); + prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); + + samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); + riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); + } + } else if (order <= 8) { + for (i = 0; i < 4; i += 1) { + prediction128 = vmulq_s32(coefficients128_4, samples128_4); + prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); + + /* Horizontal add and shift. */ + prediction64 = drflac__vhaddq_s32(prediction128); + prediction64 = vshl_s32(prediction64, shift64); + prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); + + samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); + samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); + riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); + } + } else { + for (i = 0; i < 4; i += 1) { + prediction128 = vmulq_s32(coefficients128_8, samples128_8); + prediction128 = vmlaq_s32(prediction128, coefficients128_4, samples128_4); + prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); + + /* Horizontal add and shift. */ + prediction64 = drflac__vhaddq_s32(prediction128); + prediction64 = vshl_s32(prediction64, shift64); + prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); + + samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); + samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); + samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); + riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); + } + } + + /* We store samples in groups of 4. */ + vst1q_s32(pDecodedSamples, samples128_0); + pDecodedSamples += 4; } - drflac_zero_memory(coefficients, sizeof(coefficients)); - for (i = 0; i < lpcOrder; ++i) { - if (!drflac__read_int32(bs, lpcPrecision, coefficients + i)) { + /* Make sure we process the last few samples. */ + i = (count & ~3); + while (i < (int)count) { + /* Rice extraction. */ + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { return DRFLAC_FALSE; } - } - if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, lpcShift, coefficients, pDecodedSamples)) { - return DRFLAC_FALSE; + /* Rice reconstruction. */ + riceParamParts[0] &= riceParamMask; + riceParamParts[0] |= (zeroCountParts[0] << riceParam); + riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; + + /* Sample reconstruction. */ + pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); + + i += 1; + pDecodedSamples += 1; } return DRFLAC_TRUE; } - -static drflac_bool32 drflac__read_next_flac_frame_header(drflac_bs* bs, drflac_uint8 streaminfoBitsPerSample, drflac_frame_header* header) +static drflac_bool32 drflac__decode_samples_with_residual__rice__neon_64(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { - const drflac_uint32 sampleRateTable[12] = {0, 88200, 176400, 192000, 8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000}; - const drflac_uint8 bitsPerSampleTable[8] = {0, 8, 12, (drflac_uint8)-1, 16, 20, 24, (drflac_uint8)-1}; /* -1 = reserved. */ - - drflac_assert(bs != NULL); - drflac_assert(header != NULL); + int i; + drflac_uint32 riceParamMask; + drflac_int32* pDecodedSamples = pSamplesOut; + drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); + drflac_uint32 zeroCountParts[4]; + drflac_uint32 riceParamParts[4]; + int32x4_t coefficients128_0; + int32x4_t coefficients128_4; + int32x4_t coefficients128_8; + int32x4_t samples128_0; + int32x4_t samples128_4; + int32x4_t samples128_8; + uint32x4_t riceParamMask128; + int32x4_t riceParam128; + int64x1_t shift64; + uint32x4_t one128; + + const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; + + riceParamMask = ~((~0UL) << riceParam); + riceParamMask128 = vdupq_n_u32(riceParamMask); + + riceParam128 = vdupq_n_s32(riceParam); + shift64 = vdup_n_s64(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ + one128 = vdupq_n_u32(1); - /* Keep looping until we find a valid sync code. */ - for (;;) { - drflac_uint8 crc8 = 0xCE; /* 0xCE = drflac_crc8(0, 0x3FFE, 14); */ - drflac_uint8 reserved = 0; - drflac_uint8 blockingStrategy = 0; - drflac_uint8 blockSize = 0; - drflac_uint8 sampleRate = 0; - drflac_uint8 channelAssignment = 0; - drflac_uint8 bitsPerSample = 0; - drflac_bool32 isVariableBlockSize; + /* + Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than + what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results + in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted + so I think there's opportunity for this to be simplified. + */ + { + int runningOrder = order; + drflac_int32 tempC[4] = {0, 0, 0, 0}; + drflac_int32 tempS[4] = {0, 0, 0, 0}; + + /* 0 - 3. */ + if (runningOrder >= 4) { + coefficients128_0 = vld1q_s32(coefficients + 0); + samples128_0 = vld1q_s32(pSamplesOut - 4); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ + case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ + case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ + } - if (!drflac__find_and_seek_to_next_sync_code(bs)) { - return DRFLAC_FALSE; + coefficients128_0 = vld1q_s32(tempC); + samples128_0 = vld1q_s32(tempS); + runningOrder = 0; } - if (!drflac__read_uint8(bs, 1, &reserved)) { - return DRFLAC_FALSE; - } - if (reserved == 1) { - continue; - } - crc8 = drflac_crc8(crc8, reserved, 1); + /* 4 - 7 */ + if (runningOrder >= 4) { + coefficients128_4 = vld1q_s32(coefficients + 4); + samples128_4 = vld1q_s32(pSamplesOut - 8); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ + case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ + case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ + } - if (!drflac__read_uint8(bs, 1, &blockingStrategy)) { - return DRFLAC_FALSE; + coefficients128_4 = vld1q_s32(tempC); + samples128_4 = vld1q_s32(tempS); + runningOrder = 0; } - crc8 = drflac_crc8(crc8, blockingStrategy, 1); - if (!drflac__read_uint8(bs, 4, &blockSize)) { - return DRFLAC_FALSE; - } - if (blockSize == 0) { - continue; - } - crc8 = drflac_crc8(crc8, blockSize, 4); + /* 8 - 11 */ + if (runningOrder == 4) { + coefficients128_8 = vld1q_s32(coefficients + 8); + samples128_8 = vld1q_s32(pSamplesOut - 12); + runningOrder -= 4; + } else { + switch (runningOrder) { + case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ + case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ + case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ + } - if (!drflac__read_uint8(bs, 4, &sampleRate)) { - return DRFLAC_FALSE; + coefficients128_8 = vld1q_s32(tempC); + samples128_8 = vld1q_s32(tempS); + runningOrder = 0; } - crc8 = drflac_crc8(crc8, sampleRate, 4); - if (!drflac__read_uint8(bs, 4, &channelAssignment)) { - return DRFLAC_FALSE; - } - if (channelAssignment > 10) { - continue; - } - crc8 = drflac_crc8(crc8, channelAssignment, 4); + /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ + coefficients128_0 = drflac__vrevq_s32(coefficients128_0); + coefficients128_4 = drflac__vrevq_s32(coefficients128_4); + coefficients128_8 = drflac__vrevq_s32(coefficients128_8); + } - if (!drflac__read_uint8(bs, 3, &bitsPerSample)) { + /* For this version we are doing one sample at a time. */ + while (pDecodedSamples < pDecodedSamplesEnd) { + int64x2_t prediction128; + uint32x4_t zeroCountPart128; + uint32x4_t riceParamPart128; + + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || + !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { return DRFLAC_FALSE; } - if (bitsPerSample == 3 || bitsPerSample == 7) { - continue; - } - crc8 = drflac_crc8(crc8, bitsPerSample, 3); + zeroCountPart128 = vld1q_u32(zeroCountParts); + riceParamPart128 = vld1q_u32(riceParamParts); - if (!drflac__read_uint8(bs, 1, &reserved)) { - return DRFLAC_FALSE; - } - if (reserved == 1) { - continue; - } - crc8 = drflac_crc8(crc8, reserved, 1); + riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); + riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); + riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); + for (i = 0; i < 4; i += 1) { + int64x1_t prediction64; - isVariableBlockSize = blockingStrategy == 1; - if (isVariableBlockSize) { - drflac_uint64 sampleNumber; - drflac_result result = drflac__read_utf8_coded_number(bs, &sampleNumber, &crc8); - if (result != DRFLAC_SUCCESS) { - if (result == DRFLAC_END_OF_STREAM) { - return DRFLAC_FALSE; - } else { - continue; - } - } - header->frameNumber = 0; - header->sampleNumber = sampleNumber; - } else { - drflac_uint64 frameNumber = 0; - drflac_result result = drflac__read_utf8_coded_number(bs, &frameNumber, &crc8); - if (result != DRFLAC_SUCCESS) { - if (result == DRFLAC_END_OF_STREAM) { - return DRFLAC_FALSE; - } else { - continue; - } + prediction128 = veorq_s64(prediction128, prediction128); /* Reset to 0. */ + switch (order) + { + case 12: + case 11: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_8), vget_low_s32(samples128_8))); + case 10: + case 9: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_8), vget_high_s32(samples128_8))); + case 8: + case 7: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_4), vget_low_s32(samples128_4))); + case 6: + case 5: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_4), vget_high_s32(samples128_4))); + case 4: + case 3: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_0), vget_low_s32(samples128_0))); + case 2: + case 1: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_0), vget_high_s32(samples128_0))); } - header->frameNumber = (drflac_uint32)frameNumber; /* <-- Safe cast. */ - header->sampleNumber = 0; - } + /* Horizontal add and shift. */ + prediction64 = drflac__vhaddq_s64(prediction128); + prediction64 = vshl_s64(prediction64, shift64); + prediction64 = vadd_s64(prediction64, vdup_n_s64(vgetq_lane_u32(riceParamPart128, 0))); - if (blockSize == 1) { - header->blockSize = 192; - } else if (blockSize >= 2 && blockSize <= 5) { - header->blockSize = 576 * (1 << (blockSize - 2)); - } else if (blockSize == 6) { - if (!drflac__read_uint16(bs, 8, &header->blockSize)) { - return DRFLAC_FALSE; - } - crc8 = drflac_crc8(crc8, header->blockSize, 8); - header->blockSize += 1; - } else if (blockSize == 7) { - if (!drflac__read_uint16(bs, 16, &header->blockSize)) { - return DRFLAC_FALSE; - } - crc8 = drflac_crc8(crc8, header->blockSize, 16); - header->blockSize += 1; - } else { - header->blockSize = 256 * (1 << (blockSize - 8)); + /* Our value should be sitting in prediction64[0]. We need to combine this with our SSE samples. */ + samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); + samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); + samples128_0 = drflac__valignrq_s32_1(vcombine_s32(vreinterpret_s32_s64(prediction64), vdup_n_s32(0)), samples128_0); + + /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ + riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); } + /* We store samples in groups of 4. */ + vst1q_s32(pDecodedSamples, samples128_0); + pDecodedSamples += 4; + } - if (sampleRate <= 11) { - header->sampleRate = sampleRateTable[sampleRate]; - } else if (sampleRate == 12) { - if (!drflac__read_uint32(bs, 8, &header->sampleRate)) { - return DRFLAC_FALSE; - } - crc8 = drflac_crc8(crc8, header->sampleRate, 8); - header->sampleRate *= 1000; - } else if (sampleRate == 13) { - if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { - return DRFLAC_FALSE; - } - crc8 = drflac_crc8(crc8, header->sampleRate, 16); - } else if (sampleRate == 14) { - if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { - return DRFLAC_FALSE; - } - crc8 = drflac_crc8(crc8, header->sampleRate, 16); - header->sampleRate *= 10; - } else { - continue; /* Invalid. Assume an invalid block. */ + /* Make sure we process the last few samples. */ + i = (count & ~3); + while (i < (int)count) { + /* Rice extraction. */ + if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { + return DRFLAC_FALSE; } + /* Rice reconstruction. */ + riceParamParts[0] &= riceParamMask; + riceParamParts[0] |= (zeroCountParts[0] << riceParam); + riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; - header->channelAssignment = channelAssignment; - - header->bitsPerSample = bitsPerSampleTable[bitsPerSample]; - if (header->bitsPerSample == 0) { - header->bitsPerSample = streaminfoBitsPerSample; - } - - if (!drflac__read_uint8(bs, 8, &header->crc8)) { - return DRFLAC_FALSE; - } + /* Sample reconstruction. */ + pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); -#ifndef DR_FLAC_NO_CRC - if (header->crc8 != crc8) { - continue; /* CRC mismatch. Loop back to the top and find the next sync code. */ - } -#endif - return DRFLAC_TRUE; + i += 1; + pDecodedSamples += 1; } + + return DRFLAC_TRUE; } -static drflac_bool32 drflac__read_subframe_header(drflac_bs* bs, drflac_subframe* pSubframe) +static drflac_bool32 drflac__decode_samples_with_residual__rice__neon(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { - drflac_uint8 header; - int type; - - if (!drflac__read_uint8(bs, 8, &header)) { - return DRFLAC_FALSE; - } + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(pSamplesOut != NULL); - /* First bit should always be 0. */ - if ((header & 0x80) != 0) { - return DRFLAC_FALSE; - } - - type = (header & 0x7E) >> 1; - if (type == 0) { - pSubframe->subframeType = DRFLAC_SUBFRAME_CONSTANT; - } else if (type == 1) { - pSubframe->subframeType = DRFLAC_SUBFRAME_VERBATIM; - } else { - if ((type & 0x20) != 0) { - pSubframe->subframeType = DRFLAC_SUBFRAME_LPC; - pSubframe->lpcOrder = (type & 0x1F) + 1; - } else if ((type & 0x08) != 0) { - pSubframe->subframeType = DRFLAC_SUBFRAME_FIXED; - pSubframe->lpcOrder = (type & 0x07); - if (pSubframe->lpcOrder > 4) { - pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; - pSubframe->lpcOrder = 0; - } + /* In my testing the order is rarely > 12, so in this case I'm going to simplify the NEON implementation by only handling order <= 12. */ + if (order > 0 && order <= 12) { + if (bitsPerSample+shift > 32) { + return drflac__decode_samples_with_residual__rice__neon_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); } else { - pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; + return drflac__decode_samples_with_residual__rice__neon_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); } + } else { + return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); } +} +#endif - if (pSubframe->subframeType == DRFLAC_SUBFRAME_RESERVED) { - return DRFLAC_FALSE; +static drflac_bool32 drflac__decode_samples_with_residual__rice(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) +{ +#if defined(DRFLAC_SUPPORT_SSE41) + if (drflac__gIsSSE41Supported) { + return drflac__decode_samples_with_residual__rice__sse41(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported) { + return drflac__decode_samples_with_residual__rice__neon(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); + } else +#endif + { + /* Scalar fallback. */ + #if 0 + return drflac__decode_samples_with_residual__rice__reference(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); + #else + return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); + #endif } +} - /* Wasted bits per sample. */ - pSubframe->wastedBitsPerSample = 0; - if ((header & 0x01) == 1) { - unsigned int wastedBitsPerSample; - if (!drflac__seek_past_next_set_bit(bs, &wastedBitsPerSample)) { +/* Reads and seeks past a string of residual values as Rice codes. The decoder should be sitting on the first bit of the Rice codes. */ +static drflac_bool32 drflac__read_and_seek_residual__rice(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam) +{ + drflac_uint32 i; + + DRFLAC_ASSERT(bs != NULL); + + for (i = 0; i < count; ++i) { + if (!drflac__seek_rice_parts(bs, riceParam)) { return DRFLAC_FALSE; } - pSubframe->wastedBitsPerSample = (unsigned char)wastedBitsPerSample + 1; } return DRFLAC_TRUE; } -static drflac_bool32 drflac__decode_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex, drflac_int32* pDecodedSamplesOut) +static drflac_bool32 drflac__decode_samples_with_residual__unencoded(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 unencodedBitsPerSample, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) { - drflac_subframe* pSubframe; - - drflac_assert(bs != NULL); - drflac_assert(frame != NULL); + drflac_uint32 i; - pSubframe = frame->subframes + subframeIndex; - if (!drflac__read_subframe_header(bs, pSubframe)) { - return DRFLAC_FALSE; - } + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(unencodedBitsPerSample <= 31); /* <-- unencodedBitsPerSample is a 5 bit number, so cannot exceed 31. */ + DRFLAC_ASSERT(pSamplesOut != NULL); - /* Side channels require an extra bit per sample. Took a while to figure that one out... */ - pSubframe->bitsPerSample = frame->header.bitsPerSample; - if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { - pSubframe->bitsPerSample += 1; - } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { - pSubframe->bitsPerSample += 1; - } + for (i = 0; i < count; ++i) { + if (unencodedBitsPerSample > 0) { + if (!drflac__read_int32(bs, unencodedBitsPerSample, pSamplesOut + i)) { + return DRFLAC_FALSE; + } + } else { + pSamplesOut[i] = 0; + } - /* Need to handle wasted bits per sample. */ - if (pSubframe->wastedBitsPerSample >= pSubframe->bitsPerSample) { - return DRFLAC_FALSE; + if (bitsPerSample >= 24) { + pSamplesOut[i] += drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); + } else { + pSamplesOut[i] += drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); + } } - pSubframe->bitsPerSample -= pSubframe->wastedBitsPerSample; - pSubframe->pDecodedSamples = pDecodedSamplesOut; - switch (pSubframe->subframeType) - { - case DRFLAC_SUBFRAME_CONSTANT: - { - drflac__decode_samples__constant(bs, frame->header.blockSize, pSubframe->bitsPerSample, pSubframe->pDecodedSamples); - } break; + return DRFLAC_TRUE; +} - case DRFLAC_SUBFRAME_VERBATIM: - { - drflac__decode_samples__verbatim(bs, frame->header.blockSize, pSubframe->bitsPerSample, pSubframe->pDecodedSamples); - } break; - case DRFLAC_SUBFRAME_FIXED: - { - drflac__decode_samples__fixed(bs, frame->header.blockSize, pSubframe->bitsPerSample, pSubframe->lpcOrder, pSubframe->pDecodedSamples); - } break; +/* +Reads and decodes the residual for the sub-frame the decoder is currently sitting on. This function should be called +when the decoder is sitting at the very start of the RESIDUAL block. The first residuals will be ignored. The + and parameters are used to determine how many residual values need to be decoded. +*/ +static drflac_bool32 drflac__decode_samples_with_residual(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 blockSize, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) +{ + drflac_uint8 residualMethod; + drflac_uint8 partitionOrder; + drflac_uint32 samplesInPartition; + drflac_uint32 partitionsRemaining; - case DRFLAC_SUBFRAME_LPC: - { - drflac__decode_samples__lpc(bs, frame->header.blockSize, pSubframe->bitsPerSample, pSubframe->lpcOrder, pSubframe->pDecodedSamples); - } break; + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(blockSize != 0); + DRFLAC_ASSERT(pDecodedSamples != NULL); /* <-- Should we allow NULL, in which case we just seek past the residual rather than do a full decode? */ - default: return DRFLAC_FALSE; + if (!drflac__read_uint8(bs, 2, &residualMethod)) { + return DRFLAC_FALSE; } - return DRFLAC_TRUE; -} - -static drflac_bool32 drflac__seek_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex) -{ - drflac_subframe* pSubframe; + if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { + return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ + } - drflac_assert(bs != NULL); - drflac_assert(frame != NULL); + /* Ignore the first values. */ + pDecodedSamples += order; - pSubframe = frame->subframes + subframeIndex; - if (!drflac__read_subframe_header(bs, pSubframe)) { + if (!drflac__read_uint8(bs, 4, &partitionOrder)) { return DRFLAC_FALSE; } - /* Side channels require an extra bit per sample. Took a while to figure that one out... */ - pSubframe->bitsPerSample = frame->header.bitsPerSample; - if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { - pSubframe->bitsPerSample += 1; - } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { - pSubframe->bitsPerSample += 1; + /* + From the FLAC spec: + The Rice partition order in a Rice-coded residual section must be less than or equal to 8. + */ + if (partitionOrder > 8) { + return DRFLAC_FALSE; } - /* Need to handle wasted bits per sample. */ - if (pSubframe->wastedBitsPerSample >= pSubframe->bitsPerSample) { + /* Validation check. */ + if ((blockSize / (1 << partitionOrder)) < order) { return DRFLAC_FALSE; } - pSubframe->bitsPerSample -= pSubframe->wastedBitsPerSample; - pSubframe->pDecodedSamples = NULL; - switch (pSubframe->subframeType) - { - case DRFLAC_SUBFRAME_CONSTANT: - { - if (!drflac__seek_bits(bs, pSubframe->bitsPerSample)) { + samplesInPartition = (blockSize / (1 << partitionOrder)) - order; + partitionsRemaining = (1 << partitionOrder); + for (;;) { + drflac_uint8 riceParam = 0; + if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { + if (!drflac__read_uint8(bs, 4, &riceParam)) { return DRFLAC_FALSE; } - } break; - - case DRFLAC_SUBFRAME_VERBATIM: - { - unsigned int bitsToSeek = frame->header.blockSize * pSubframe->bitsPerSample; - if (!drflac__seek_bits(bs, bitsToSeek)) { - return DRFLAC_FALSE; + if (riceParam == 15) { + riceParam = 0xFF; } - } break; - - case DRFLAC_SUBFRAME_FIXED: - { - unsigned int bitsToSeek = pSubframe->lpcOrder * pSubframe->bitsPerSample; - if (!drflac__seek_bits(bs, bitsToSeek)) { + } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { + if (!drflac__read_uint8(bs, 5, &riceParam)) { return DRFLAC_FALSE; } + if (riceParam == 31) { + riceParam = 0xFF; + } + } - if (!drflac__read_and_seek_residual(bs, frame->header.blockSize, pSubframe->lpcOrder)) { + if (riceParam != 0xFF) { + if (!drflac__decode_samples_with_residual__rice(bs, bitsPerSample, samplesInPartition, riceParam, order, shift, coefficients, pDecodedSamples)) { return DRFLAC_FALSE; } - } break; - - case DRFLAC_SUBFRAME_LPC: - { - unsigned char lpcPrecision; - - unsigned int bitsToSeek = pSubframe->lpcOrder * pSubframe->bitsPerSample; - if (!drflac__seek_bits(bs, bitsToSeek)) { + } else { + drflac_uint8 unencodedBitsPerSample = 0; + if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { return DRFLAC_FALSE; } - if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { + if (!drflac__decode_samples_with_residual__unencoded(bs, bitsPerSample, samplesInPartition, unencodedBitsPerSample, order, shift, coefficients, pDecodedSamples)) { return DRFLAC_FALSE; } - if (lpcPrecision == 15) { - return DRFLAC_FALSE; /* Invalid. */ - } - lpcPrecision += 1; + } + pDecodedSamples += samplesInPartition; - bitsToSeek = (pSubframe->lpcOrder * lpcPrecision) + 5; /* +5 for shift. */ - if (!drflac__seek_bits(bs, bitsToSeek)) { - return DRFLAC_FALSE; - } + if (partitionsRemaining == 1) { + break; + } - if (!drflac__read_and_seek_residual(bs, frame->header.blockSize, pSubframe->lpcOrder)) { - return DRFLAC_FALSE; - } - } break; + partitionsRemaining -= 1; - default: return DRFLAC_FALSE; + if (partitionOrder != 0) { + samplesInPartition = blockSize / (1 << partitionOrder); + } } return DRFLAC_TRUE; } - -static DRFLAC_INLINE drflac_uint8 drflac__get_channel_count_from_channel_assignment(drflac_int8 channelAssignment) +/* +Reads and seeks past the residual for the sub-frame the decoder is currently sitting on. This function should be called +when the decoder is sitting at the very start of the RESIDUAL block. The first residuals will be set to 0. The + and parameters are used to determine how many residual values need to be decoded. +*/ +static drflac_bool32 drflac__read_and_seek_residual(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 order) { - drflac_uint8 lookup[] = {1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2}; - - drflac_assert(channelAssignment <= 10); - return lookup[channelAssignment]; -} - -static drflac_result drflac__decode_flac_frame(drflac* pFlac) -{ - int channelCount; - int i; - drflac_uint8 paddingSizeInBits; - drflac_uint16 desiredCRC16; -#ifndef DR_FLAC_NO_CRC - drflac_uint16 actualCRC16; -#endif + drflac_uint8 residualMethod; + drflac_uint8 partitionOrder; + drflac_uint32 samplesInPartition; + drflac_uint32 partitionsRemaining; - /* This function should be called while the stream is sitting on the first byte after the frame header. */ - drflac_zero_memory(pFlac->currentFrame.subframes, sizeof(pFlac->currentFrame.subframes)); + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(blockSize != 0); - /* The frame block size must never be larger than the maximum block size defined by the FLAC stream. */ - if (pFlac->currentFrame.header.blockSize > pFlac->maxBlockSize) { - return DRFLAC_ERROR; + if (!drflac__read_uint8(bs, 2, &residualMethod)) { + return DRFLAC_FALSE; } - /* The number of channels in the frame must match the channel count from the STREAMINFO block. */ - channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - if (channelCount != (int)pFlac->channels) { - return DRFLAC_ERROR; + if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { + return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ } - for (i = 0; i < channelCount; ++i) { - if (!drflac__decode_subframe(&pFlac->bs, &pFlac->currentFrame, i, pFlac->pDecodedSamples + ((pFlac->currentFrame.header.blockSize+DRFLAC_LEADING_SAMPLES) * i) + DRFLAC_LEADING_SAMPLES)) { - return DRFLAC_ERROR; - } + if (!drflac__read_uint8(bs, 4, &partitionOrder)) { + return DRFLAC_FALSE; } - paddingSizeInBits = DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7; - if (paddingSizeInBits > 0) { - drflac_uint8 padding = 0; - if (!drflac__read_uint8(&pFlac->bs, paddingSizeInBits, &padding)) { - return DRFLAC_END_OF_STREAM; - } + /* + From the FLAC spec: + The Rice partition order in a Rice-coded residual section must be less than or equal to 8. + */ + if (partitionOrder > 8) { + return DRFLAC_FALSE; } -#ifndef DR_FLAC_NO_CRC - actualCRC16 = drflac__flush_crc16(&pFlac->bs); -#endif - if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { - return DRFLAC_END_OF_STREAM; + /* Validation check. */ + if ((blockSize / (1 << partitionOrder)) <= order) { + return DRFLAC_FALSE; } -#ifndef DR_FLAC_NO_CRC - if (actualCRC16 != desiredCRC16) { - return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ - } -#endif + samplesInPartition = (blockSize / (1 << partitionOrder)) - order; + partitionsRemaining = (1 << partitionOrder); + for (;;) + { + drflac_uint8 riceParam = 0; + if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { + if (!drflac__read_uint8(bs, 4, &riceParam)) { + return DRFLAC_FALSE; + } + if (riceParam == 15) { + riceParam = 0xFF; + } + } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { + if (!drflac__read_uint8(bs, 5, &riceParam)) { + return DRFLAC_FALSE; + } + if (riceParam == 31) { + riceParam = 0xFF; + } + } - pFlac->currentFrame.samplesRemaining = pFlac->currentFrame.header.blockSize * channelCount; + if (riceParam != 0xFF) { + if (!drflac__read_and_seek_residual__rice(bs, samplesInPartition, riceParam)) { + return DRFLAC_FALSE; + } + } else { + drflac_uint8 unencodedBitsPerSample = 0; + if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { + return DRFLAC_FALSE; + } - return DRFLAC_SUCCESS; -} + if (!drflac__seek_bits(bs, unencodedBitsPerSample * samplesInPartition)) { + return DRFLAC_FALSE; + } + } -static drflac_result drflac__seek_flac_frame(drflac* pFlac) -{ - int channelCount; - int i; - drflac_uint16 desiredCRC16; -#ifndef DR_FLAC_NO_CRC - drflac_uint16 actualCRC16; -#endif - channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - for (i = 0; i < channelCount; ++i) { - if (!drflac__seek_subframe(&pFlac->bs, &pFlac->currentFrame, i)) { - return DRFLAC_ERROR; + if (partitionsRemaining == 1) { + break; } - } - /* Padding. */ - if (!drflac__seek_bits(&pFlac->bs, DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7)) { - return DRFLAC_ERROR; + partitionsRemaining -= 1; + samplesInPartition = blockSize / (1 << partitionOrder); } - /* CRC. */ -#ifndef DR_FLAC_NO_CRC - actualCRC16 = drflac__flush_crc16(&pFlac->bs); -#endif - if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { - return DRFLAC_END_OF_STREAM; + return DRFLAC_TRUE; +} + + +static drflac_bool32 drflac__decode_samples__constant(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) +{ + drflac_uint32 i; + + /* Only a single sample needs to be decoded here. */ + drflac_int32 sample; + if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { + return DRFLAC_FALSE; } -#ifndef DR_FLAC_NO_CRC - if (actualCRC16 != desiredCRC16) { - return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ + /* + We don't really need to expand this, but it does simplify the process of reading samples. If this becomes a performance issue (unlikely) + we'll want to look at a more efficient way. + */ + for (i = 0; i < blockSize; ++i) { + pDecodedSamples[i] = sample; } -#endif - return DRFLAC_SUCCESS; + return DRFLAC_TRUE; } -static drflac_bool32 drflac__read_and_decode_next_flac_frame(drflac* pFlac) +static drflac_bool32 drflac__decode_samples__verbatim(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) { - drflac_assert(pFlac != NULL); - - for (;;) { - drflac_result result; + drflac_uint32 i; - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { + for (i = 0; i < blockSize; ++i) { + drflac_int32 sample; + if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { return DRFLAC_FALSE; } - result = drflac__decode_flac_frame(pFlac); - if (result != DRFLAC_SUCCESS) { - if (result == DRFLAC_CRC_MISMATCH) { - continue; /* CRC mismatch. Skip to the next frame. */ - } else { - return DRFLAC_FALSE; - } - } - - return DRFLAC_TRUE; + pDecodedSamples[i] = sample; } -} + return DRFLAC_TRUE; +} -static void drflac__get_current_frame_sample_range(drflac* pFlac, drflac_uint64* pFirstSampleInFrameOut, drflac_uint64* pLastSampleInFrameOut) +static drflac_bool32 drflac__decode_samples__fixed(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) { - unsigned int channelCount; - drflac_uint64 firstSampleInFrame; - drflac_uint64 lastSampleInFrame; + drflac_uint32 i; - drflac_assert(pFlac != NULL); + static drflac_int32 lpcCoefficientsTable[5][4] = { + {0, 0, 0, 0}, + {1, 0, 0, 0}, + {2, -1, 0, 0}, + {3, -3, 1, 0}, + {4, -6, 4, -1} + }; - channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); + /* Warm up samples and coefficients. */ + for (i = 0; i < lpcOrder; ++i) { + drflac_int32 sample; + if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { + return DRFLAC_FALSE; + } - firstSampleInFrame = pFlac->currentFrame.header.sampleNumber*channelCount; - if (firstSampleInFrame == 0) { - firstSampleInFrame = pFlac->currentFrame.header.frameNumber * pFlac->maxBlockSize*channelCount; + pDecodedSamples[i] = sample; } - lastSampleInFrame = firstSampleInFrame + (pFlac->currentFrame.header.blockSize*channelCount); - if (lastSampleInFrame > 0) { - lastSampleInFrame -= 1; /* Needs to be zero based. */ + if (!drflac__decode_samples_with_residual(bs, subframeBitsPerSample, blockSize, lpcOrder, 0, lpcCoefficientsTable[lpcOrder], pDecodedSamples)) { + return DRFLAC_FALSE; } - if (pFirstSampleInFrameOut) { - *pFirstSampleInFrameOut = firstSampleInFrame; - } - if (pLastSampleInFrameOut) { - *pLastSampleInFrameOut = lastSampleInFrame; - } + return DRFLAC_TRUE; } -/* This function will be replacing drflac__get_current_frame_sample_range(), but it's not currently used so I have commented it out to silence a compiler warning. */ -#if 0 -static void drflac__get_pcm_frame_range_of_current_flac_frame(drflac* pFlac, drflac_uint64* pFirstPCMFrame, drflac_uint64* pLastPCMFrame) +static drflac_bool32 drflac__decode_samples__lpc(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) { - drflac_uint64 firstPCMFrame; - drflac_uint64 lastPCMFrame; - - drflac_assert(pFlac != NULL); + drflac_uint8 i; + drflac_uint8 lpcPrecision; + drflac_int8 lpcShift; + drflac_int32 coefficients[32]; - firstPCMFrame = pFlac->currentFrame.header.sampleNumber; - if (firstPCMFrame == 0) { - firstPCMFrame = pFlac->currentFrame.header.frameNumber * pFlac->maxBlockSize; - } + /* Warm up samples. */ + for (i = 0; i < lpcOrder; ++i) { + drflac_int32 sample; + if (!drflac__read_int32(bs, bitsPerSample, &sample)) { + return DRFLAC_FALSE; + } - lastPCMFrame = firstPCMFrame + (pFlac->currentFrame.header.blockSize); - if (lastPCMFrame > 0) { - lastPCMFrame -= 1; /* Needs to be zero based. */ + pDecodedSamples[i] = sample; } - if (pFirstPCMFrame) { - *pFirstPCMFrame = firstPCMFrame; + if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { + return DRFLAC_FALSE; } - if (pLastPCMFrame) { - *pLastPCMFrame = lastPCMFrame; + if (lpcPrecision == 15) { + return DRFLAC_FALSE; /* Invalid. */ } -} -#endif - -static drflac_bool32 drflac__seek_to_first_frame(drflac* pFlac) -{ - drflac_bool32 result; - - drflac_assert(pFlac != NULL); + lpcPrecision += 1; - result = drflac__seek_to_byte(&pFlac->bs, pFlac->firstFramePos); + if (!drflac__read_int8(bs, 5, &lpcShift)) { + return DRFLAC_FALSE; + } - drflac_zero_memory(&pFlac->currentFrame, sizeof(pFlac->currentFrame)); - pFlac->currentSample = 0; + /* + From the FLAC specification: - return result; -} + Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed two's-complement) -static DRFLAC_INLINE drflac_result drflac__seek_to_next_flac_frame(drflac* pFlac) -{ - /* This function should only ever be called while the decoder is sitting on the first byte past the FRAME_HEADER section. */ - drflac_assert(pFlac != NULL); - return drflac__seek_flac_frame(pFlac); -} + Emphasis on the "signed two's-complement". In practice there does not seem to be any encoders nor decoders supporting negative shifts. For now dr_flac is + not going to support negative shifts as I don't have any reference files. However, when a reference file comes through I will consider adding support. + */ + if (lpcShift < 0) { + return DRFLAC_FALSE; + } -drflac_uint64 drflac__seek_forward_by_samples(drflac* pFlac, drflac_uint64 samplesToRead) -{ - drflac_uint64 samplesRead = 0; - while (samplesToRead > 0) { - if (pFlac->currentFrame.samplesRemaining == 0) { - if (!drflac__read_and_decode_next_flac_frame(pFlac)) { - break; /* Couldn't read the next frame, so just break from the loop and return. */ - } - } else { - if (pFlac->currentFrame.samplesRemaining > samplesToRead) { - samplesRead += samplesToRead; - pFlac->currentFrame.samplesRemaining -= (drflac_uint32)samplesToRead; /* <-- Safe cast. Will always be < currentFrame.samplesRemaining < 65536. */ - samplesToRead = 0; - } else { - samplesRead += pFlac->currentFrame.samplesRemaining; - samplesToRead -= pFlac->currentFrame.samplesRemaining; - pFlac->currentFrame.samplesRemaining = 0; - } + DRFLAC_ZERO_MEMORY(coefficients, sizeof(coefficients)); + for (i = 0; i < lpcOrder; ++i) { + if (!drflac__read_int32(bs, lpcPrecision, coefficients + i)) { + return DRFLAC_FALSE; } } - pFlac->currentSample += samplesRead; - return samplesRead; -} + if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, lpcShift, coefficients, pDecodedSamples)) { + return DRFLAC_FALSE; + } -drflac_uint64 drflac__seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 pcmFramesToSeek) -{ - return drflac__seek_forward_by_samples(pFlac, pcmFramesToSeek*pFlac->channels); + return DRFLAC_TRUE; } -static drflac_bool32 drflac__seek_to_sample__brute_force(drflac* pFlac, drflac_uint64 sampleIndex) -{ - drflac_bool32 isMidFrame = DRFLAC_FALSE; - drflac_uint64 runningSampleCount; - drflac_assert(pFlac != NULL); +static drflac_bool32 drflac__read_next_flac_frame_header(drflac_bs* bs, drflac_uint8 streaminfoBitsPerSample, drflac_frame_header* header) +{ + const drflac_uint32 sampleRateTable[12] = {0, 88200, 176400, 192000, 8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000}; + const drflac_uint8 bitsPerSampleTable[8] = {0, 8, 12, (drflac_uint8)-1, 16, 20, 24, (drflac_uint8)-1}; /* -1 = reserved. */ - /* If we are seeking forward we start from the current position. Otherwise we need to start all the way from the start of the file. */ - if (sampleIndex >= pFlac->currentSample) { - /* Seeking forward. Need to seek from the current position. */ - runningSampleCount = pFlac->currentSample; + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(header != NULL); - /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ - if (pFlac->currentSample == 0 && pFlac->currentFrame.samplesRemaining == 0) { - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { - return DRFLAC_FALSE; - } - } else { - isMidFrame = DRFLAC_TRUE; - } - } else { - /* Seeking backwards. Need to seek from the start of the file. */ - runningSampleCount = 0; + /* Keep looping until we find a valid sync code. */ + for (;;) { + drflac_uint8 crc8 = 0xCE; /* 0xCE = drflac_crc8(0, 0x3FFE, 14); */ + drflac_uint8 reserved = 0; + drflac_uint8 blockingStrategy = 0; + drflac_uint8 blockSize = 0; + drflac_uint8 sampleRate = 0; + drflac_uint8 channelAssignment = 0; + drflac_uint8 bitsPerSample = 0; + drflac_bool32 isVariableBlockSize; - /* Move back to the start. */ - if (!drflac__seek_to_first_frame(pFlac)) { + if (!drflac__find_and_seek_to_next_sync_code(bs)) { return DRFLAC_FALSE; } - /* Decode the first frame in preparation for sample-exact seeking below. */ - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { + if (!drflac__read_uint8(bs, 1, &reserved)) { return DRFLAC_FALSE; } - } + if (reserved == 1) { + continue; + } + crc8 = drflac_crc8(crc8, reserved, 1); - /* - We need to as quickly as possible find the frame that contains the target sample. To do this, we iterate over each frame and inspect its - header. If based on the header we can determine that the frame contains the sample, we do a full decode of that frame. - */ - for (;;) { - drflac_uint64 sampleCountInThisFrame; - drflac_uint64 firstSampleInFrame = 0; - drflac_uint64 lastSampleInFrame = 0; + if (!drflac__read_uint8(bs, 1, &blockingStrategy)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, blockingStrategy, 1); + + if (!drflac__read_uint8(bs, 4, &blockSize)) { + return DRFLAC_FALSE; + } + if (blockSize == 0) { + continue; + } + crc8 = drflac_crc8(crc8, blockSize, 4); - drflac__get_current_frame_sample_range(pFlac, &firstSampleInFrame, &lastSampleInFrame); + if (!drflac__read_uint8(bs, 4, &sampleRate)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, sampleRate, 4); - sampleCountInThisFrame = (lastSampleInFrame - firstSampleInFrame) + 1; - if (sampleIndex < (runningSampleCount + sampleCountInThisFrame)) { - /* - The sample should be in this frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend - it never existed and keep iterating. - */ - drflac_uint64 samplesToDecode = sampleIndex - runningSampleCount; + if (!drflac__read_uint8(bs, 4, &channelAssignment)) { + return DRFLAC_FALSE; + } + if (channelAssignment > 10) { + continue; + } + crc8 = drflac_crc8(crc8, channelAssignment, 4); - if (!isMidFrame) { - drflac_result result = drflac__decode_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ - return drflac__seek_forward_by_samples(pFlac, samplesToDecode) == samplesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ + if (!drflac__read_uint8(bs, 3, &bitsPerSample)) { + return DRFLAC_FALSE; + } + if (bitsPerSample == 3 || bitsPerSample == 7) { + continue; + } + crc8 = drflac_crc8(crc8, bitsPerSample, 3); + + + if (!drflac__read_uint8(bs, 1, &reserved)) { + return DRFLAC_FALSE; + } + if (reserved == 1) { + continue; + } + crc8 = drflac_crc8(crc8, reserved, 1); + + + isVariableBlockSize = blockingStrategy == 1; + if (isVariableBlockSize) { + drflac_uint64 pcmFrameNumber; + drflac_result result = drflac__read_utf8_coded_number(bs, &pcmFrameNumber, &crc8); + if (result != DRFLAC_SUCCESS) { + if (result == DRFLAC_AT_END) { + return DRFLAC_FALSE; } else { - if (result == DRFLAC_CRC_MISMATCH) { - goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } + continue; } - } else { - /* We started seeking mid-frame which means we need to skip the frame decoding part. */ - return drflac__seek_forward_by_samples(pFlac, samplesToDecode) == samplesToDecode; } + header->flacFrameNumber = 0; + header->pcmFrameNumber = pcmFrameNumber; } else { - /* - It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this - frame never existed and leave the running sample count untouched. - */ - if (!isMidFrame) { - drflac_result result = drflac__seek_to_next_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - runningSampleCount += sampleCountInThisFrame; + drflac_uint64 flacFrameNumber = 0; + drflac_result result = drflac__read_utf8_coded_number(bs, &flacFrameNumber, &crc8); + if (result != DRFLAC_SUCCESS) { + if (result == DRFLAC_AT_END) { + return DRFLAC_FALSE; } else { - if (result == DRFLAC_CRC_MISMATCH) { - goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } + continue; } - } else { - /* - We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with - drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. - */ - runningSampleCount += pFlac->currentFrame.samplesRemaining; - pFlac->currentFrame.samplesRemaining = 0; - isMidFrame = DRFLAC_FALSE; } + header->flacFrameNumber = (drflac_uint32)flacFrameNumber; /* <-- Safe cast. */ + header->pcmFrameNumber = 0; } - next_iteration: - /* Grab the next frame in preparation for the next iteration. */ - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { - return DRFLAC_FALSE; - } - } -} - - -static drflac_bool32 drflac__seek_to_sample__seek_table(drflac* pFlac, drflac_uint64 sampleIndex) -{ - drflac_uint32 iClosestSeekpoint = 0; - drflac_bool32 isMidFrame = DRFLAC_FALSE; - drflac_uint64 runningSampleCount; - drflac_uint32 iSeekpoint; - - drflac_assert(pFlac != NULL); - if (pFlac->pSeekpoints == NULL || pFlac->seekpointCount == 0) { - return DRFLAC_FALSE; - } - - for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { - if (pFlac->pSeekpoints[iSeekpoint].firstSample*pFlac->channels >= sampleIndex) { - break; + DRFLAC_ASSERT(blockSize > 0); + if (blockSize == 1) { + header->blockSizeInPCMFrames = 192; + } else if (blockSize <= 5) { + DRFLAC_ASSERT(blockSize >= 2); + header->blockSizeInPCMFrames = 576 * (1 << (blockSize - 2)); + } else if (blockSize == 6) { + if (!drflac__read_uint16(bs, 8, &header->blockSizeInPCMFrames)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 8); + header->blockSizeInPCMFrames += 1; + } else if (blockSize == 7) { + if (!drflac__read_uint16(bs, 16, &header->blockSizeInPCMFrames)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 16); + header->blockSizeInPCMFrames += 1; + } else { + DRFLAC_ASSERT(blockSize >= 8); + header->blockSizeInPCMFrames = 256 * (1 << (blockSize - 8)); } - iClosestSeekpoint = iSeekpoint; - } - - /* - At this point we should have found the seekpoint closest to our sample. If we are seeking forward and the closest seekpoint is _before_ the current sample, we - just seek forward from where we are. Otherwise we start seeking from the seekpoint's first sample. - */ - if ((sampleIndex >= pFlac->currentSample) && (pFlac->pSeekpoints[iClosestSeekpoint].firstSample*pFlac->channels <= pFlac->currentSample)) { - /* Optimized case. Just seek forward from where we are. */ - runningSampleCount = pFlac->currentSample; - /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ - if (pFlac->currentSample == 0 && pFlac->currentFrame.samplesRemaining == 0) { - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { + if (sampleRate <= 11) { + header->sampleRate = sampleRateTable[sampleRate]; + } else if (sampleRate == 12) { + if (!drflac__read_uint32(bs, 8, &header->sampleRate)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, header->sampleRate, 8); + header->sampleRate *= 1000; + } else if (sampleRate == 13) { + if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { + return DRFLAC_FALSE; + } + crc8 = drflac_crc8(crc8, header->sampleRate, 16); + } else if (sampleRate == 14) { + if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { return DRFLAC_FALSE; } + crc8 = drflac_crc8(crc8, header->sampleRate, 16); + header->sampleRate *= 10; } else { - isMidFrame = DRFLAC_TRUE; + continue; /* Invalid. Assume an invalid block. */ } - } else { - /* Slower case. Seek to the start of the seekpoint and then seek forward from there. */ - runningSampleCount = pFlac->pSeekpoints[iClosestSeekpoint].firstSample*pFlac->channels; - if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFramePos + pFlac->pSeekpoints[iClosestSeekpoint].frameOffset)) { - return DRFLAC_FALSE; + + header->channelAssignment = channelAssignment; + + header->bitsPerSample = bitsPerSampleTable[bitsPerSample]; + if (header->bitsPerSample == 0) { + header->bitsPerSample = streaminfoBitsPerSample; } - /* Grab the frame the seekpoint is sitting on in preparation for the sample-exact seeking below. */ - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { + if (!drflac__read_uint8(bs, 8, &header->crc8)) { return DRFLAC_FALSE; } + +#ifndef DR_FLAC_NO_CRC + if (header->crc8 != crc8) { + continue; /* CRC mismatch. Loop back to the top and find the next sync code. */ + } +#endif + return DRFLAC_TRUE; } +} - for (;;) { - drflac_uint64 sampleCountInThisFrame; - drflac_uint64 firstSampleInFrame = 0; - drflac_uint64 lastSampleInFrame = 0; - drflac__get_current_frame_sample_range(pFlac, &firstSampleInFrame, &lastSampleInFrame); +static drflac_bool32 drflac__read_subframe_header(drflac_bs* bs, drflac_subframe* pSubframe) +{ + drflac_uint8 header; + int type; - sampleCountInThisFrame = (lastSampleInFrame - firstSampleInFrame) + 1; - if (sampleIndex < (runningSampleCount + sampleCountInThisFrame)) { - /* - The sample should be in this frame. We need to fully decode it, but if it's an invalid frame (a CRC mismatch) we need to pretend - it never existed and keep iterating. - */ - drflac_uint64 samplesToDecode = sampleIndex - runningSampleCount; + if (!drflac__read_uint8(bs, 8, &header)) { + return DRFLAC_FALSE; + } - if (!isMidFrame) { - drflac_result result = drflac__decode_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ - return drflac__seek_forward_by_samples(pFlac, samplesToDecode) == samplesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ - } else { - if (result == DRFLAC_CRC_MISMATCH) { - goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } - } - } else { - /* We started seeking mid-frame which means we need to skip the frame decoding part. */ - return drflac__seek_forward_by_samples(pFlac, samplesToDecode) == samplesToDecode; + /* First bit should always be 0. */ + if ((header & 0x80) != 0) { + return DRFLAC_FALSE; + } + + type = (header & 0x7E) >> 1; + if (type == 0) { + pSubframe->subframeType = DRFLAC_SUBFRAME_CONSTANT; + } else if (type == 1) { + pSubframe->subframeType = DRFLAC_SUBFRAME_VERBATIM; + } else { + if ((type & 0x20) != 0) { + pSubframe->subframeType = DRFLAC_SUBFRAME_LPC; + pSubframe->lpcOrder = (drflac_uint8)(type & 0x1F) + 1; + } else if ((type & 0x08) != 0) { + pSubframe->subframeType = DRFLAC_SUBFRAME_FIXED; + pSubframe->lpcOrder = (drflac_uint8)(type & 0x07); + if (pSubframe->lpcOrder > 4) { + pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; + pSubframe->lpcOrder = 0; } } else { - /* - It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this - frame never existed and leave the running sample count untouched. - */ - if (!isMidFrame) { - drflac_result result = drflac__seek_to_next_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - runningSampleCount += sampleCountInThisFrame; - } else { - if (result == DRFLAC_CRC_MISMATCH) { - goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } - } - } else { - /* - We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with - drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. - */ - runningSampleCount += pFlac->currentFrame.samplesRemaining; - pFlac->currentFrame.samplesRemaining = 0; - isMidFrame = DRFLAC_FALSE; - } + pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; } + } - next_iteration: - /* Grab the next frame in preparation for the next iteration. */ - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { + if (pSubframe->subframeType == DRFLAC_SUBFRAME_RESERVED) { + return DRFLAC_FALSE; + } + + /* Wasted bits per sample. */ + pSubframe->wastedBitsPerSample = 0; + if ((header & 0x01) == 1) { + unsigned int wastedBitsPerSample; + if (!drflac__seek_past_next_set_bit(bs, &wastedBitsPerSample)) { return DRFLAC_FALSE; } + pSubframe->wastedBitsPerSample = (drflac_uint8)wastedBitsPerSample + 1; } -} + return DRFLAC_TRUE; +} -#ifndef DR_FLAC_NO_OGG -typedef struct +static drflac_bool32 drflac__decode_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex, drflac_int32* pDecodedSamplesOut) { - drflac_uint8 capturePattern[4]; /* Should be "OggS" */ - drflac_uint8 structureVersion; /* Always 0. */ - drflac_uint8 headerType; - drflac_uint64 granulePosition; - drflac_uint32 serialNumber; - drflac_uint32 sequenceNumber; - drflac_uint32 checksum; - drflac_uint8 segmentCount; - drflac_uint8 segmentTable[255]; -} drflac_ogg_page_header; -#endif + drflac_subframe* pSubframe; + drflac_uint32 subframeBitsPerSample; -typedef struct -{ - drflac_read_proc onRead; - drflac_seek_proc onSeek; - drflac_meta_proc onMeta; - drflac_container container; - void* pUserData; - void* pUserDataMD; - drflac_uint32 sampleRate; - drflac_uint8 channels; - drflac_uint8 bitsPerSample; - drflac_uint64 totalSampleCount; - drflac_uint16 maxBlockSize; - drflac_uint64 runningFilePos; - drflac_bool32 hasStreamInfoBlock; - drflac_bool32 hasMetadataBlocks; - drflac_bs bs; /* <-- A bit streamer is required for loading data during initialization. */ - drflac_frame_header firstFrameHeader; /* <-- The header of the first frame that was read during relaxed initalization. Only set if there is no STREAMINFO block. */ + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(frame != NULL); -#ifndef DR_FLAC_NO_OGG - drflac_uint32 oggSerial; - drflac_uint64 oggFirstBytePos; - drflac_ogg_page_header oggBosHeader; -#endif -} drflac_init_info; + pSubframe = frame->subframes + subframeIndex; + if (!drflac__read_subframe_header(bs, pSubframe)) { + return DRFLAC_FALSE; + } -static DRFLAC_INLINE void drflac__decode_block_header(drflac_uint32 blockHeader, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) -{ - blockHeader = drflac__be2host_32(blockHeader); - *isLastBlock = (blockHeader & 0x80000000UL) >> 31; - *blockType = (blockHeader & 0x7F000000UL) >> 24; - *blockSize = (blockHeader & 0x00FFFFFFUL); -} + /* Side channels require an extra bit per sample. Took a while to figure that one out... */ + subframeBitsPerSample = frame->header.bitsPerSample; + if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { + subframeBitsPerSample += 1; + } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { + subframeBitsPerSample += 1; + } -static DRFLAC_INLINE drflac_bool32 drflac__read_and_decode_block_header(drflac_read_proc onRead, void* pUserData, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) -{ - drflac_uint32 blockHeader; - if (onRead(pUserData, &blockHeader, 4) != 4) { + /* Need to handle wasted bits per sample. */ + if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { return DRFLAC_FALSE; } + subframeBitsPerSample -= pSubframe->wastedBitsPerSample; + + pSubframe->pSamplesS32 = pDecodedSamplesOut; + + switch (pSubframe->subframeType) + { + case DRFLAC_SUBFRAME_CONSTANT: + { + drflac__decode_samples__constant(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); + } break; + + case DRFLAC_SUBFRAME_VERBATIM: + { + drflac__decode_samples__verbatim(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); + } break; + + case DRFLAC_SUBFRAME_FIXED: + { + drflac__decode_samples__fixed(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); + } break; + + case DRFLAC_SUBFRAME_LPC: + { + drflac__decode_samples__lpc(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); + } break; + + default: return DRFLAC_FALSE; + } - drflac__decode_block_header(blockHeader, isLastBlock, blockType, blockSize); return DRFLAC_TRUE; } -drflac_bool32 drflac__read_streaminfo(drflac_read_proc onRead, void* pUserData, drflac_streaminfo* pStreamInfo) +static drflac_bool32 drflac__seek_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex) { - drflac_uint32 blockSizes; - drflac_uint64 frameSizes = 0; - drflac_uint64 importantProps; - drflac_uint8 md5[16]; + drflac_subframe* pSubframe; + drflac_uint32 subframeBitsPerSample; - /* min/max block size. */ - if (onRead(pUserData, &blockSizes, 4) != 4) { - return DRFLAC_FALSE; - } + DRFLAC_ASSERT(bs != NULL); + DRFLAC_ASSERT(frame != NULL); - /* min/max frame size. */ - if (onRead(pUserData, &frameSizes, 6) != 6) { + pSubframe = frame->subframes + subframeIndex; + if (!drflac__read_subframe_header(bs, pSubframe)) { return DRFLAC_FALSE; } - /* Sample rate, channels, bits per sample and total sample count. */ - if (onRead(pUserData, &importantProps, 8) != 8) { - return DRFLAC_FALSE; + /* Side channels require an extra bit per sample. Took a while to figure that one out... */ + subframeBitsPerSample = frame->header.bitsPerSample; + if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { + subframeBitsPerSample += 1; + } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { + subframeBitsPerSample += 1; } - /* MD5 */ - if (onRead(pUserData, md5, sizeof(md5)) != sizeof(md5)) { + /* Need to handle wasted bits per sample. */ + if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { return DRFLAC_FALSE; } + subframeBitsPerSample -= pSubframe->wastedBitsPerSample; - blockSizes = drflac__be2host_32(blockSizes); - frameSizes = drflac__be2host_64(frameSizes); - importantProps = drflac__be2host_64(importantProps); - - pStreamInfo->minBlockSize = (blockSizes & 0xFFFF0000) >> 16; - pStreamInfo->maxBlockSize = (blockSizes & 0x0000FFFF); - pStreamInfo->minFrameSize = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 24)) >> 40); - pStreamInfo->maxFrameSize = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 0)) >> 16); - pStreamInfo->sampleRate = (drflac_uint32)((importantProps & (((drflac_uint64)0x000FFFFF << 16) << 28)) >> 44); - pStreamInfo->channels = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000000E << 16) << 24)) >> 41) + 1; - pStreamInfo->bitsPerSample = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000001F << 16) << 20)) >> 36) + 1; - pStreamInfo->totalSampleCount = ((importantProps & ((((drflac_uint64)0x0000000F << 16) << 16) | 0xFFFFFFFF))) * pStreamInfo->channels; - drflac_copy_memory(pStreamInfo->md5, md5, sizeof(md5)); + pSubframe->pSamplesS32 = NULL; - return DRFLAC_TRUE; -} + switch (pSubframe->subframeType) + { + case DRFLAC_SUBFRAME_CONSTANT: + { + if (!drflac__seek_bits(bs, subframeBitsPerSample)) { + return DRFLAC_FALSE; + } + } break; -drflac_bool32 drflac__read_and_decode_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_uint64* pFirstFramePos, drflac_uint64* pSeektablePos, drflac_uint32* pSeektableSize) -{ - /* - We want to keep track of the byte position in the stream of the seektable. At the time of calling this function we know that - we'll be sitting on byte 42. - */ - drflac_uint64 runningFilePos = 42; - drflac_uint64 seektablePos = 0; - drflac_uint32 seektableSize = 0; + case DRFLAC_SUBFRAME_VERBATIM: + { + unsigned int bitsToSeek = frame->header.blockSizeInPCMFrames * subframeBitsPerSample; + if (!drflac__seek_bits(bs, bitsToSeek)) { + return DRFLAC_FALSE; + } + } break; - for (;;) { - drflac_metadata metadata; - drflac_uint8 isLastBlock = 0; - drflac_uint8 blockType; - drflac_uint32 blockSize; - if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { - return DRFLAC_FALSE; - } - runningFilePos += 4; + case DRFLAC_SUBFRAME_FIXED: + { + unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; + if (!drflac__seek_bits(bs, bitsToSeek)) { + return DRFLAC_FALSE; + } - metadata.type = blockType; - metadata.pRawData = NULL; - metadata.rawDataSize = 0; + if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { + return DRFLAC_FALSE; + } + } break; - switch (blockType) + case DRFLAC_SUBFRAME_LPC: { - case DRFLAC_METADATA_BLOCK_TYPE_APPLICATION: - { - if (blockSize < 4) { - return DRFLAC_FALSE; - } + drflac_uint8 lpcPrecision; - if (onMeta) { - void* pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } + unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; + if (!drflac__seek_bits(bs, bitsToSeek)) { + return DRFLAC_FALSE; + } - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { + return DRFLAC_FALSE; + } + if (lpcPrecision == 15) { + return DRFLAC_FALSE; /* Invalid. */ + } + lpcPrecision += 1; - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; - metadata.data.application.id = drflac__be2host_32(*(drflac_uint32*)pRawData); - metadata.data.application.pData = (const void*)((drflac_uint8*)pRawData + sizeof(drflac_uint32)); - metadata.data.application.dataSize = blockSize - sizeof(drflac_uint32); - onMeta(pUserDataMD, &metadata); - DRFLAC_FREE(pRawData); - } - } break; + bitsToSeek = (pSubframe->lpcOrder * lpcPrecision) + 5; /* +5 for shift. */ + if (!drflac__seek_bits(bs, bitsToSeek)) { + return DRFLAC_FALSE; + } - case DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE: - { - seektablePos = runningFilePos; - seektableSize = blockSize; + if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { + return DRFLAC_FALSE; + } + } break; - if (onMeta) { - drflac_uint32 iSeekpoint; - void* pRawData; + default: return DRFLAC_FALSE; + } - pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } + return DRFLAC_TRUE; +} - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; - metadata.data.seektable.seekpointCount = blockSize/sizeof(drflac_seekpoint); - metadata.data.seektable.pSeekpoints = (const drflac_seekpoint*)pRawData; +static DRFLAC_INLINE drflac_uint8 drflac__get_channel_count_from_channel_assignment(drflac_int8 channelAssignment) +{ + drflac_uint8 lookup[] = {1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2}; - /* Endian swap. */ - for (iSeekpoint = 0; iSeekpoint < metadata.data.seektable.seekpointCount; ++iSeekpoint) { - drflac_seekpoint* pSeekpoint = (drflac_seekpoint*)pRawData + iSeekpoint; - pSeekpoint->firstSample = drflac__be2host_64(pSeekpoint->firstSample); - pSeekpoint->frameOffset = drflac__be2host_64(pSeekpoint->frameOffset); - pSeekpoint->sampleCount = drflac__be2host_16(pSeekpoint->sampleCount); - } + DRFLAC_ASSERT(channelAssignment <= 10); + return lookup[channelAssignment]; +} - onMeta(pUserDataMD, &metadata); +static drflac_result drflac__decode_flac_frame(drflac* pFlac) +{ + int channelCount; + int i; + drflac_uint8 paddingSizeInBits; + drflac_uint16 desiredCRC16; +#ifndef DR_FLAC_NO_CRC + drflac_uint16 actualCRC16; +#endif - DRFLAC_FREE(pRawData); - } - } break; + /* This function should be called while the stream is sitting on the first byte after the frame header. */ + DRFLAC_ZERO_MEMORY(pFlac->currentFLACFrame.subframes, sizeof(pFlac->currentFLACFrame.subframes)); - case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT: - { - if (blockSize < 8) { - return DRFLAC_FALSE; - } + /* The frame block size must never be larger than the maximum block size defined by the FLAC stream. */ + if (pFlac->currentFLACFrame.header.blockSizeInPCMFrames > pFlac->maxBlockSizeInPCMFrames) { + return DRFLAC_ERROR; + } - if (onMeta) { - void* pRawData; - const char* pRunningData; - const char* pRunningDataEnd; - drflac_uint32 i; + /* The number of channels in the frame must match the channel count from the STREAMINFO block. */ + channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); + if (channelCount != (int)pFlac->channels) { + return DRFLAC_ERROR; + } - pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } + for (i = 0; i < channelCount; ++i) { + if (!drflac__decode_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i, pFlac->pDecodedSamples + (pFlac->currentFLACFrame.header.blockSizeInPCMFrames * i))) { + return DRFLAC_ERROR; + } + } - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + paddingSizeInBits = (drflac_uint8)(DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7); + if (paddingSizeInBits > 0) { + drflac_uint8 padding = 0; + if (!drflac__read_uint8(&pFlac->bs, paddingSizeInBits, &padding)) { + return DRFLAC_AT_END; + } + } - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; +#ifndef DR_FLAC_NO_CRC + actualCRC16 = drflac__flush_crc16(&pFlac->bs); +#endif + if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { + return DRFLAC_AT_END; + } - pRunningData = (const char*)pRawData; - pRunningDataEnd = (const char*)pRawData + blockSize; +#ifndef DR_FLAC_NO_CRC + if (actualCRC16 != desiredCRC16) { + return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ + } +#endif - metadata.data.vorbis_comment.vendorLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + pFlac->currentFLACFrame.pcmFramesRemaining = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; - /* Need space for the rest of the block */ - if ((pRunningDataEnd - pRunningData) - 4 < (drflac_int64)metadata.data.vorbis_comment.vendorLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); + return DRFLAC_SUCCESS; +} + +static drflac_result drflac__seek_flac_frame(drflac* pFlac) +{ + int channelCount; + int i; + drflac_uint16 desiredCRC16; +#ifndef DR_FLAC_NO_CRC + drflac_uint16 actualCRC16; +#endif + + channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); + for (i = 0; i < channelCount; ++i) { + if (!drflac__seek_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i)) { + return DRFLAC_ERROR; + } + } + + /* Padding. */ + if (!drflac__seek_bits(&pFlac->bs, DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7)) { + return DRFLAC_ERROR; + } + + /* CRC. */ +#ifndef DR_FLAC_NO_CRC + actualCRC16 = drflac__flush_crc16(&pFlac->bs); +#endif + if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { + return DRFLAC_AT_END; + } + +#ifndef DR_FLAC_NO_CRC + if (actualCRC16 != desiredCRC16) { + return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ + } +#endif + + return DRFLAC_SUCCESS; +} + +static drflac_bool32 drflac__read_and_decode_next_flac_frame(drflac* pFlac) +{ + DRFLAC_ASSERT(pFlac != NULL); + + for (;;) { + drflac_result result; + + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + + result = drflac__decode_flac_frame(pFlac); + if (result != DRFLAC_SUCCESS) { + if (result == DRFLAC_CRC_MISMATCH) { + continue; /* CRC mismatch. Skip to the next frame. */ + } else { + return DRFLAC_FALSE; + } + } + + return DRFLAC_TRUE; + } +} + +static void drflac__get_pcm_frame_range_of_current_flac_frame(drflac* pFlac, drflac_uint64* pFirstPCMFrame, drflac_uint64* pLastPCMFrame) +{ + drflac_uint64 firstPCMFrame; + drflac_uint64 lastPCMFrame; + + DRFLAC_ASSERT(pFlac != NULL); + + firstPCMFrame = pFlac->currentFLACFrame.header.pcmFrameNumber; + if (firstPCMFrame == 0) { + firstPCMFrame = ((drflac_uint64)pFlac->currentFLACFrame.header.flacFrameNumber) * pFlac->maxBlockSizeInPCMFrames; + } + + lastPCMFrame = firstPCMFrame + pFlac->currentFLACFrame.header.blockSizeInPCMFrames; + if (lastPCMFrame > 0) { + lastPCMFrame -= 1; /* Needs to be zero based. */ + } + + if (pFirstPCMFrame) { + *pFirstPCMFrame = firstPCMFrame; + } + if (pLastPCMFrame) { + *pLastPCMFrame = lastPCMFrame; + } +} + +static drflac_bool32 drflac__seek_to_first_frame(drflac* pFlac) +{ + drflac_bool32 result; + + DRFLAC_ASSERT(pFlac != NULL); + + result = drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes); + + DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); + pFlac->currentPCMFrame = 0; + + return result; +} + +static DRFLAC_INLINE drflac_result drflac__seek_to_next_flac_frame(drflac* pFlac) +{ + /* This function should only ever be called while the decoder is sitting on the first byte past the FRAME_HEADER section. */ + DRFLAC_ASSERT(pFlac != NULL); + return drflac__seek_flac_frame(pFlac); +} + + +static drflac_uint64 drflac__seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 pcmFramesToSeek) +{ + drflac_uint64 pcmFramesRead = 0; + while (pcmFramesToSeek > 0) { + if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { + if (!drflac__read_and_decode_next_flac_frame(pFlac)) { + break; /* Couldn't read the next frame, so just break from the loop and return. */ + } + } else { + if (pFlac->currentFLACFrame.pcmFramesRemaining > pcmFramesToSeek) { + pcmFramesRead += pcmFramesToSeek; + pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)pcmFramesToSeek; /* <-- Safe cast. Will always be < currentFrame.pcmFramesRemaining < 65536. */ + pcmFramesToSeek = 0; + } else { + pcmFramesRead += pFlac->currentFLACFrame.pcmFramesRemaining; + pcmFramesToSeek -= pFlac->currentFLACFrame.pcmFramesRemaining; + pFlac->currentFLACFrame.pcmFramesRemaining = 0; + } + } + } + + pFlac->currentPCMFrame += pcmFramesRead; + return pcmFramesRead; +} + + +static drflac_bool32 drflac__seek_to_pcm_frame__brute_force(drflac* pFlac, drflac_uint64 pcmFrameIndex) +{ + drflac_bool32 isMidFrame = DRFLAC_FALSE; + drflac_uint64 runningPCMFrameCount; + + DRFLAC_ASSERT(pFlac != NULL); + + /* If we are seeking forward we start from the current position. Otherwise we need to start all the way from the start of the file. */ + if (pcmFrameIndex >= pFlac->currentPCMFrame) { + /* Seeking forward. Need to seek from the current position. */ + runningPCMFrameCount = pFlac->currentPCMFrame; + + /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ + if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } else { + isMidFrame = DRFLAC_TRUE; + } + } else { + /* Seeking backwards. Need to seek from the start of the file. */ + runningPCMFrameCount = 0; + + /* Move back to the start. */ + if (!drflac__seek_to_first_frame(pFlac)) { + return DRFLAC_FALSE; + } + + /* Decode the first frame in preparation for sample-exact seeking below. */ + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } + + /* + We need to as quickly as possible find the frame that contains the target sample. To do this, we iterate over each frame and inspect its + header. If based on the header we can determine that the frame contains the sample, we do a full decode of that frame. + */ + for (;;) { + drflac_uint64 pcmFrameCountInThisFLACFrame; + drflac_uint64 firstPCMFrameInFLACFrame = 0; + drflac_uint64 lastPCMFrameInFLACFrame = 0; + + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); + + pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; + if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { + /* + The sample should be in this frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend + it never existed and keep iterating. + */ + drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; + + if (!isMidFrame) { + drflac_result result = drflac__decode_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ + } else { + if (result == DRFLAC_CRC_MISMATCH) { + goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ + } else { return DRFLAC_FALSE; } - metadata.data.vorbis_comment.vendor = pRunningData; pRunningData += metadata.data.vorbis_comment.vendorLength; - metadata.data.vorbis_comment.commentCount = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - - /* Need space for 'commentCount' comments after the block, which at minimum is a drflac_uint32 per comment */ - if ((pRunningDataEnd - pRunningData) / sizeof(drflac_uint32) < metadata.data.vorbis_comment.commentCount) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); + } + } else { + /* We started seeking mid-frame which means we need to skip the frame decoding part. */ + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; + } + } else { + /* + It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this + frame never existed and leave the running sample count untouched. + */ + if (!isMidFrame) { + drflac_result result = drflac__seek_to_next_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + runningPCMFrameCount += pcmFrameCountInThisFLACFrame; + } else { + if (result == DRFLAC_CRC_MISMATCH) { + goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ + } else { return DRFLAC_FALSE; } - metadata.data.vorbis_comment.pComments = pRunningData; + } + } else { + /* + We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with + drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. + */ + runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; + pFlac->currentFLACFrame.pcmFramesRemaining = 0; + isMidFrame = DRFLAC_FALSE; + } - /* Check that the comments section is valid before passing it to the callback */ - for (i = 0; i < metadata.data.vorbis_comment.commentCount; ++i) { - drflac_uint32 commentLength; + /* If we are seeking to the end of the file and we've just hit it, we're done. */ + if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { + return DRFLAC_TRUE; + } + } + + next_iteration: + /* Grab the next frame in preparation for the next iteration. */ + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } +} + + +#if !defined(DR_FLAC_NO_CRC) +/* +We use an average compression ratio to determine our approximate start location. FLAC files are generally about 50%-70% the size of their +uncompressed counterparts so we'll use this as a basis. I'm going to split the middle and use a factor of 0.6 to determine the starting +location. +*/ +#define DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO 0.6f + +static drflac_bool32 drflac__seek_to_approximate_flac_frame_to_byte(drflac* pFlac, drflac_uint64 targetByte, drflac_uint64 rangeLo, drflac_uint64 rangeHi, drflac_uint64* pLastSuccessfulSeekOffset) +{ + DRFLAC_ASSERT(pFlac != NULL); + DRFLAC_ASSERT(pLastSuccessfulSeekOffset != NULL); + DRFLAC_ASSERT(targetByte >= rangeLo); + DRFLAC_ASSERT(targetByte <= rangeHi); + + *pLastSuccessfulSeekOffset = pFlac->firstFLACFramePosInBytes; + + for (;;) { + /* After rangeLo == rangeHi == targetByte fails, we need to break out. */ + drflac_uint64 lastTargetByte = targetByte; + + /* When seeking to a byte, failure probably means we've attempted to seek beyond the end of the stream. To counter this we just halve it each attempt. */ + if (!drflac__seek_to_byte(&pFlac->bs, targetByte)) { + /* If we couldn't even seek to the first byte in the stream we have a problem. Just abandon the whole thing. */ + if (targetByte == 0) { + drflac__seek_to_first_frame(pFlac); /* Try to recover. */ + return DRFLAC_FALSE; + } + + /* Halve the byte location and continue. */ + targetByte = rangeLo + ((rangeHi - rangeLo)/2); + rangeHi = targetByte; + } else { + /* Getting here should mean that we have seeked to an appropriate byte. */ + + /* Clear the details of the FLAC frame so we don't misreport data. */ + DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); + + /* + Now seek to the next FLAC frame. We need to decode the entire frame (not just the header) because it's possible for the header to incorrectly pass the + CRC check and return bad data. We need to decode the entire frame to be more certain. Although this seems unlikely, this has happened to me in testing + so it needs to stay this way for now. + */ +#if 1 + if (!drflac__read_and_decode_next_flac_frame(pFlac)) { + /* Halve the byte location and continue. */ + targetByte = rangeLo + ((rangeHi - rangeLo)/2); + rangeHi = targetByte; + } else { + break; + } +#else + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + /* Halve the byte location and continue. */ + targetByte = rangeLo + ((rangeHi - rangeLo)/2); + rangeHi = targetByte; + } else { + break; + } +#endif + } + + /* We already tried this byte and there are no more to try, break out. */ + if(targetByte == lastTargetByte) { + return DRFLAC_FALSE; + } + } + + /* The current PCM frame needs to be updated based on the frame we just seeked to. */ + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); + + DRFLAC_ASSERT(targetByte <= rangeHi); + + *pLastSuccessfulSeekOffset = targetByte; + return DRFLAC_TRUE; +} + +static drflac_bool32 drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 offset) +{ + /* This section of code would be used if we were only decoding the FLAC frame header when calling drflac__seek_to_approximate_flac_frame_to_byte(). */ +#if 0 + if (drflac__decode_flac_frame(pFlac) != DRFLAC_SUCCESS) { + /* We failed to decode this frame which may be due to it being corrupt. We'll just use the next valid FLAC frame. */ + if (drflac__read_and_decode_next_flac_frame(pFlac) == DRFLAC_FALSE) { + return DRFLAC_FALSE; + } + } +#endif + + return drflac__seek_forward_by_pcm_frames(pFlac, offset) == offset; +} + + +static drflac_bool32 drflac__seek_to_pcm_frame__binary_search_internal(drflac* pFlac, drflac_uint64 pcmFrameIndex, drflac_uint64 byteRangeLo, drflac_uint64 byteRangeHi) +{ + /* This assumes pFlac->currentPCMFrame is sitting on byteRangeLo upon entry. */ + + drflac_uint64 targetByte; + drflac_uint64 pcmRangeLo = pFlac->totalPCMFrameCount; + drflac_uint64 pcmRangeHi = 0; + drflac_uint64 lastSuccessfulSeekOffset = (drflac_uint64)-1; + drflac_uint64 closestSeekOffsetBeforeTargetPCMFrame = byteRangeLo; + drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; + + targetByte = byteRangeLo + (drflac_uint64)(((drflac_int64)((pcmFrameIndex - pFlac->currentPCMFrame) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO); + if (targetByte > byteRangeHi) { + targetByte = byteRangeHi; + } + + for (;;) { + if (drflac__seek_to_approximate_flac_frame_to_byte(pFlac, targetByte, byteRangeLo, byteRangeHi, &lastSuccessfulSeekOffset)) { + /* We found a FLAC frame. We need to check if it contains the sample we're looking for. */ + drflac_uint64 newPCMRangeLo; + drflac_uint64 newPCMRangeHi; + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &newPCMRangeLo, &newPCMRangeHi); + + /* If we selected the same frame, it means we should be pretty close. Just decode the rest. */ + if (pcmRangeLo == newPCMRangeLo) { + if (!drflac__seek_to_approximate_flac_frame_to_byte(pFlac, closestSeekOffsetBeforeTargetPCMFrame, closestSeekOffsetBeforeTargetPCMFrame, byteRangeHi, &lastSuccessfulSeekOffset)) { + break; /* Failed to seek to closest frame. */ + } + + if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { + return DRFLAC_TRUE; + } else { + break; /* Failed to seek forward. */ + } + } + + pcmRangeLo = newPCMRangeLo; + pcmRangeHi = newPCMRangeHi; + + if (pcmRangeLo <= pcmFrameIndex && pcmRangeHi >= pcmFrameIndex) { + /* The target PCM frame is in this FLAC frame. */ + if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame) ) { + return DRFLAC_TRUE; + } else { + break; /* Failed to seek to FLAC frame. */ + } + } else { + const float approxCompressionRatio = (drflac_int64)(lastSuccessfulSeekOffset - pFlac->firstFLACFramePosInBytes) / ((drflac_int64)(pcmRangeLo * pFlac->channels * pFlac->bitsPerSample)/8.0f); + + if (pcmRangeLo > pcmFrameIndex) { + /* We seeked too far forward. We need to move our target byte backward and try again. */ + byteRangeHi = lastSuccessfulSeekOffset; + if (byteRangeLo > byteRangeHi) { + byteRangeLo = byteRangeHi; + } + + targetByte = byteRangeLo + ((byteRangeHi - byteRangeLo) / 2); + if (targetByte < byteRangeLo) { + targetByte = byteRangeLo; + } + } else /*if (pcmRangeHi < pcmFrameIndex)*/ { + /* We didn't seek far enough. We need to move our target byte forward and try again. */ + + /* If we're close enough we can just seek forward. */ + if ((pcmFrameIndex - pcmRangeLo) < seekForwardThreshold) { + if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { + return DRFLAC_TRUE; + } else { + break; /* Failed to seek to FLAC frame. */ + } + } else { + byteRangeLo = lastSuccessfulSeekOffset; + if (byteRangeHi < byteRangeLo) { + byteRangeHi = byteRangeLo; + } + + targetByte = lastSuccessfulSeekOffset + (drflac_uint64)(((drflac_int64)((pcmFrameIndex-pcmRangeLo) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * approxCompressionRatio); + if (targetByte > byteRangeHi) { + targetByte = byteRangeHi; + } + + if (closestSeekOffsetBeforeTargetPCMFrame < lastSuccessfulSeekOffset) { + closestSeekOffsetBeforeTargetPCMFrame = lastSuccessfulSeekOffset; + } + } + } + } + } else { + /* Getting here is really bad. We just recover as best we can, but moving to the first frame in the stream, and then abort. */ + break; + } + } + + drflac__seek_to_first_frame(pFlac); /* <-- Try to recover. */ + return DRFLAC_FALSE; +} + +static drflac_bool32 drflac__seek_to_pcm_frame__binary_search(drflac* pFlac, drflac_uint64 pcmFrameIndex) +{ + drflac_uint64 byteRangeLo; + drflac_uint64 byteRangeHi; + drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; + + /* Our algorithm currently assumes the FLAC stream is currently sitting at the start. */ + if (drflac__seek_to_first_frame(pFlac) == DRFLAC_FALSE) { + return DRFLAC_FALSE; + } + + /* If we're close enough to the start, just move to the start and seek forward. */ + if (pcmFrameIndex < seekForwardThreshold) { + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFrameIndex) == pcmFrameIndex; + } + + /* + Our starting byte range is the byte position of the first FLAC frame and the approximate end of the file as if it were completely uncompressed. This ensures + the entire file is included, even though most of the time it'll exceed the end of the actual stream. This is OK as the frame searching logic will handle it. + */ + byteRangeLo = pFlac->firstFLACFramePosInBytes; + byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); + + return drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi); +} +#endif /* !DR_FLAC_NO_CRC */ + +static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac_uint64 pcmFrameIndex) +{ + drflac_uint32 iClosestSeekpoint = 0; + drflac_bool32 isMidFrame = DRFLAC_FALSE; + drflac_uint64 runningPCMFrameCount; + drflac_uint32 iSeekpoint; + + + DRFLAC_ASSERT(pFlac != NULL); + + if (pFlac->pSeekpoints == NULL || pFlac->seekpointCount == 0) { + return DRFLAC_FALSE; + } + + for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { + if (pFlac->pSeekpoints[iSeekpoint].firstPCMFrame >= pcmFrameIndex) { + break; + } + + iClosestSeekpoint = iSeekpoint; + } + + /* There's been cases where the seek table contains only zeros. We need to do some basic validation on the closest seekpoint. */ + if (pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount == 0 || pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount > pFlac->maxBlockSizeInPCMFrames) { + return DRFLAC_FALSE; + } + if (pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame > pFlac->totalPCMFrameCount && pFlac->totalPCMFrameCount > 0) { + return DRFLAC_FALSE; + } + +#if !defined(DR_FLAC_NO_CRC) + /* At this point we should know the closest seek point. We can use a binary search for this. We need to know the total sample count for this. */ + if (pFlac->totalPCMFrameCount > 0) { + drflac_uint64 byteRangeLo; + drflac_uint64 byteRangeHi; + + byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); + byteRangeLo = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset; + + /* + If our closest seek point is not the last one, we only need to search between it and the next one. The section below calculates an appropriate starting + value for byteRangeHi which will clamp it appropriately. + + Note that the next seekpoint must have an offset greater than the closest seekpoint because otherwise our binary search algorithm will break down. There + have been cases where a seektable consists of seek points where every byte offset is set to 0 which causes problems. If this happens we need to abort. + */ + if (iClosestSeekpoint < pFlac->seekpointCount-1) { + drflac_uint32 iNextSeekpoint = iClosestSeekpoint + 1; + + /* Basic validation on the seekpoints to ensure they're usable. */ + if (pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset >= pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset || pFlac->pSeekpoints[iNextSeekpoint].pcmFrameCount == 0) { + return DRFLAC_FALSE; /* The next seekpoint doesn't look right. The seek table cannot be trusted from here. Abort. */ + } + + if (pFlac->pSeekpoints[iNextSeekpoint].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Make sure it's not a placeholder seekpoint. */ + byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset - 1; /* byteRangeHi must be zero based. */ + } + } + + if (drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { + if (drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); + + if (drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi)) { + return DRFLAC_TRUE; + } + } + } + } +#endif /* !DR_FLAC_NO_CRC */ + + /* Getting here means we need to use a slower algorithm because the binary search method failed or cannot be used. */ + + /* + If we are seeking forward and the closest seekpoint is _before_ the current sample, we just seek forward from where we are. Otherwise we start seeking + from the seekpoint's first sample. + */ + if (pcmFrameIndex >= pFlac->currentPCMFrame && pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame <= pFlac->currentPCMFrame) { + /* Optimized case. Just seek forward from where we are. */ + runningPCMFrameCount = pFlac->currentPCMFrame; + + /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ + if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } else { + isMidFrame = DRFLAC_TRUE; + } + } else { + /* Slower case. Seek to the start of the seekpoint and then seek forward from there. */ + runningPCMFrameCount = pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame; + + if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { + return DRFLAC_FALSE; + } + + /* Grab the frame the seekpoint is sitting on in preparation for the sample-exact seeking below. */ + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } + + for (;;) { + drflac_uint64 pcmFrameCountInThisFLACFrame; + drflac_uint64 firstPCMFrameInFLACFrame = 0; + drflac_uint64 lastPCMFrameInFLACFrame = 0; + + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); + + pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; + if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { + /* + The sample should be in this frame. We need to fully decode it, but if it's an invalid frame (a CRC mismatch) we need to pretend + it never existed and keep iterating. + */ + drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; + + if (!isMidFrame) { + drflac_result result = drflac__decode_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ + } else { + if (result == DRFLAC_CRC_MISMATCH) { + goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ + } else { + return DRFLAC_FALSE; + } + } + } else { + /* We started seeking mid-frame which means we need to skip the frame decoding part. */ + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; + } + } else { + /* + It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this + frame never existed and leave the running sample count untouched. + */ + if (!isMidFrame) { + drflac_result result = drflac__seek_to_next_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + runningPCMFrameCount += pcmFrameCountInThisFLACFrame; + } else { + if (result == DRFLAC_CRC_MISMATCH) { + goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ + } else { + return DRFLAC_FALSE; + } + } + } else { + /* + We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with + drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. + */ + runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; + pFlac->currentFLACFrame.pcmFramesRemaining = 0; + isMidFrame = DRFLAC_FALSE; + } + + /* If we are seeking to the end of the file and we've just hit it, we're done. */ + if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { + return DRFLAC_TRUE; + } + } + + next_iteration: + /* Grab the next frame in preparation for the next iteration. */ + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + } +} + + +#ifndef DR_FLAC_NO_OGG +typedef struct +{ + drflac_uint8 capturePattern[4]; /* Should be "OggS" */ + drflac_uint8 structureVersion; /* Always 0. */ + drflac_uint8 headerType; + drflac_uint64 granulePosition; + drflac_uint32 serialNumber; + drflac_uint32 sequenceNumber; + drflac_uint32 checksum; + drflac_uint8 segmentCount; + drflac_uint8 segmentTable[255]; +} drflac_ogg_page_header; +#endif + +typedef struct +{ + drflac_read_proc onRead; + drflac_seek_proc onSeek; + drflac_meta_proc onMeta; + drflac_container container; + void* pUserData; + void* pUserDataMD; + drflac_uint32 sampleRate; + drflac_uint8 channels; + drflac_uint8 bitsPerSample; + drflac_uint64 totalPCMFrameCount; + drflac_uint16 maxBlockSizeInPCMFrames; + drflac_uint64 runningFilePos; + drflac_bool32 hasStreamInfoBlock; + drflac_bool32 hasMetadataBlocks; + drflac_bs bs; /* <-- A bit streamer is required for loading data during initialization. */ + drflac_frame_header firstFrameHeader; /* <-- The header of the first frame that was read during relaxed initalization. Only set if there is no STREAMINFO block. */ + +#ifndef DR_FLAC_NO_OGG + drflac_uint32 oggSerial; + drflac_uint64 oggFirstBytePos; + drflac_ogg_page_header oggBosHeader; +#endif +} drflac_init_info; + +static DRFLAC_INLINE void drflac__decode_block_header(drflac_uint32 blockHeader, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) +{ + blockHeader = drflac__be2host_32(blockHeader); + *isLastBlock = (drflac_uint8)((blockHeader & 0x80000000UL) >> 31); + *blockType = (drflac_uint8)((blockHeader & 0x7F000000UL) >> 24); + *blockSize = (blockHeader & 0x00FFFFFFUL); +} + +static DRFLAC_INLINE drflac_bool32 drflac__read_and_decode_block_header(drflac_read_proc onRead, void* pUserData, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) +{ + drflac_uint32 blockHeader; + + *blockSize = 0; + if (onRead(pUserData, &blockHeader, 4) != 4) { + return DRFLAC_FALSE; + } + + drflac__decode_block_header(blockHeader, isLastBlock, blockType, blockSize); + return DRFLAC_TRUE; +} + +static drflac_bool32 drflac__read_streaminfo(drflac_read_proc onRead, void* pUserData, drflac_streaminfo* pStreamInfo) +{ + drflac_uint32 blockSizes; + drflac_uint64 frameSizes = 0; + drflac_uint64 importantProps; + drflac_uint8 md5[16]; + + /* min/max block size. */ + if (onRead(pUserData, &blockSizes, 4) != 4) { + return DRFLAC_FALSE; + } + + /* min/max frame size. */ + if (onRead(pUserData, &frameSizes, 6) != 6) { + return DRFLAC_FALSE; + } + + /* Sample rate, channels, bits per sample and total sample count. */ + if (onRead(pUserData, &importantProps, 8) != 8) { + return DRFLAC_FALSE; + } + + /* MD5 */ + if (onRead(pUserData, md5, sizeof(md5)) != sizeof(md5)) { + return DRFLAC_FALSE; + } + + blockSizes = drflac__be2host_32(blockSizes); + frameSizes = drflac__be2host_64(frameSizes); + importantProps = drflac__be2host_64(importantProps); + + pStreamInfo->minBlockSizeInPCMFrames = (drflac_uint16)((blockSizes & 0xFFFF0000) >> 16); + pStreamInfo->maxBlockSizeInPCMFrames = (drflac_uint16) (blockSizes & 0x0000FFFF); + pStreamInfo->minFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 24)) >> 40); + pStreamInfo->maxFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 0)) >> 16); + pStreamInfo->sampleRate = (drflac_uint32)((importantProps & (((drflac_uint64)0x000FFFFF << 16) << 28)) >> 44); + pStreamInfo->channels = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000000E << 16) << 24)) >> 41) + 1; + pStreamInfo->bitsPerSample = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000001F << 16) << 20)) >> 36) + 1; + pStreamInfo->totalPCMFrameCount = ((importantProps & ((((drflac_uint64)0x0000000F << 16) << 16) | 0xFFFFFFFF))); + DRFLAC_COPY_MEMORY(pStreamInfo->md5, md5, sizeof(md5)); + + return DRFLAC_TRUE; +} + + +static void* drflac__malloc_default(size_t sz, void* pUserData) +{ + (void)pUserData; + return DRFLAC_MALLOC(sz); +} + +static void* drflac__realloc_default(void* p, size_t sz, void* pUserData) +{ + (void)pUserData; + return DRFLAC_REALLOC(p, sz); +} + +static void drflac__free_default(void* p, void* pUserData) +{ + (void)pUserData; + DRFLAC_FREE(p); +} + + +static void* drflac__malloc_from_callbacks(size_t sz, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + if (pAllocationCallbacks == NULL) { + return NULL; + } + + if (pAllocationCallbacks->onMalloc != NULL) { + return pAllocationCallbacks->onMalloc(sz, pAllocationCallbacks->pUserData); + } + + /* Try using realloc(). */ + if (pAllocationCallbacks->onRealloc != NULL) { + return pAllocationCallbacks->onRealloc(NULL, sz, pAllocationCallbacks->pUserData); + } + + return NULL; +} + +static void* drflac__realloc_from_callbacks(void* p, size_t szNew, size_t szOld, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + if (pAllocationCallbacks == NULL) { + return NULL; + } + + if (pAllocationCallbacks->onRealloc != NULL) { + return pAllocationCallbacks->onRealloc(p, szNew, pAllocationCallbacks->pUserData); + } + + /* Try emulating realloc() in terms of malloc()/free(). */ + if (pAllocationCallbacks->onMalloc != NULL && pAllocationCallbacks->onFree != NULL) { + void* p2; + + p2 = pAllocationCallbacks->onMalloc(szNew, pAllocationCallbacks->pUserData); + if (p2 == NULL) { + return NULL; + } + + if (p != NULL) { + DRFLAC_COPY_MEMORY(p2, p, szOld); + pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); + } + + return p2; + } + + return NULL; +} + +static void drflac__free_from_callbacks(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + if (p == NULL || pAllocationCallbacks == NULL) { + return; + } + + if (pAllocationCallbacks->onFree != NULL) { + pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); + } +} + + +static drflac_bool32 drflac__read_and_decode_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_uint64* pFirstFramePos, drflac_uint64* pSeektablePos, drflac_uint32* pSeektableSize, drflac_allocation_callbacks* pAllocationCallbacks) +{ + /* + We want to keep track of the byte position in the stream of the seektable. At the time of calling this function we know that + we'll be sitting on byte 42. + */ + drflac_uint64 runningFilePos = 42; + drflac_uint64 seektablePos = 0; + drflac_uint32 seektableSize = 0; + + for (;;) { + drflac_metadata metadata; + drflac_uint8 isLastBlock = 0; + drflac_uint8 blockType; + drflac_uint32 blockSize; + if (drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize) == DRFLAC_FALSE) { + return DRFLAC_FALSE; + } + runningFilePos += 4; + + metadata.type = blockType; + metadata.pRawData = NULL; + metadata.rawDataSize = 0; + + switch (blockType) + { + case DRFLAC_METADATA_BLOCK_TYPE_APPLICATION: + { + if (blockSize < 4) { + return DRFLAC_FALSE; + } + + if (onMeta) { + void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + metadata.data.application.id = drflac__be2host_32(*(drflac_uint32*)pRawData); + metadata.data.application.pData = (const void*)((drflac_uint8*)pRawData + sizeof(drflac_uint32)); + metadata.data.application.dataSize = blockSize - sizeof(drflac_uint32); + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE: + { + seektablePos = runningFilePos; + seektableSize = blockSize; + + if (onMeta) { + drflac_uint32 iSeekpoint; + void* pRawData; + + pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + metadata.data.seektable.seekpointCount = blockSize/sizeof(drflac_seekpoint); + metadata.data.seektable.pSeekpoints = (const drflac_seekpoint*)pRawData; + + /* Endian swap. */ + for (iSeekpoint = 0; iSeekpoint < metadata.data.seektable.seekpointCount; ++iSeekpoint) { + drflac_seekpoint* pSeekpoint = (drflac_seekpoint*)pRawData + iSeekpoint; + pSeekpoint->firstPCMFrame = drflac__be2host_64(pSeekpoint->firstPCMFrame); + pSeekpoint->flacFrameOffset = drflac__be2host_64(pSeekpoint->flacFrameOffset); + pSeekpoint->pcmFrameCount = drflac__be2host_16(pSeekpoint->pcmFrameCount); + } + + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT: + { + if (blockSize < 8) { + return DRFLAC_FALSE; + } + + if (onMeta) { + void* pRawData; + const char* pRunningData; + const char* pRunningDataEnd; + drflac_uint32 i; + + pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + + pRunningData = (const char*)pRawData; + pRunningDataEnd = (const char*)pRawData + blockSize; + + metadata.data.vorbis_comment.vendorLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + + /* Need space for the rest of the block */ + if ((pRunningDataEnd - pRunningData) - 4 < (drflac_int64)metadata.data.vorbis_comment.vendorLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + metadata.data.vorbis_comment.vendor = pRunningData; pRunningData += metadata.data.vorbis_comment.vendorLength; + metadata.data.vorbis_comment.commentCount = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + + /* Need space for 'commentCount' comments after the block, which at minimum is a drflac_uint32 per comment */ + if ((pRunningDataEnd - pRunningData) / sizeof(drflac_uint32) < metadata.data.vorbis_comment.commentCount) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + metadata.data.vorbis_comment.pComments = pRunningData; + + /* Check that the comments section is valid before passing it to the callback */ + for (i = 0; i < metadata.data.vorbis_comment.commentCount; ++i) { + drflac_uint32 commentLength; + + if (pRunningDataEnd - pRunningData < 4) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + commentLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + if (pRunningDataEnd - pRunningData < (drflac_int64)commentLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + pRunningData += commentLength; + } + + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_CUESHEET: + { + if (blockSize < 396) { + return DRFLAC_FALSE; + } + + if (onMeta) { + void* pRawData; + const char* pRunningData; + const char* pRunningDataEnd; + drflac_uint8 iTrack; + drflac_uint8 iIndex; + + pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + + pRunningData = (const char*)pRawData; + pRunningDataEnd = (const char*)pRawData + blockSize; + + DRFLAC_COPY_MEMORY(metadata.data.cuesheet.catalog, pRunningData, 128); pRunningData += 128; + metadata.data.cuesheet.leadInSampleCount = drflac__be2host_64(*(const drflac_uint64*)pRunningData); pRunningData += 8; + metadata.data.cuesheet.isCD = (pRunningData[0] & 0x80) != 0; pRunningData += 259; + metadata.data.cuesheet.trackCount = pRunningData[0]; pRunningData += 1; + metadata.data.cuesheet.pTrackData = pRunningData; + + /* Check that the cuesheet tracks are valid before passing it to the callback */ + for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { + drflac_uint8 indexCount; + drflac_uint32 indexPointSize; + + if (pRunningDataEnd - pRunningData < 36) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + /* Skip to the index point count */ + pRunningData += 35; + indexCount = pRunningData[0]; pRunningData += 1; + indexPointSize = indexCount * sizeof(drflac_cuesheet_track_index); + if (pRunningDataEnd - pRunningData < (drflac_int64)indexPointSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + /* Endian swap. */ + for (iIndex = 0; iIndex < indexCount; ++iIndex) { + drflac_cuesheet_track_index* pTrack = (drflac_cuesheet_track_index*)pRunningData; + pRunningData += sizeof(drflac_cuesheet_track_index); + pTrack->offset = drflac__be2host_64(pTrack->offset); + } + } + + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_PICTURE: + { + if (blockSize < 32) { + return DRFLAC_FALSE; + } + + if (onMeta) { + void* pRawData; + const char* pRunningData; + const char* pRunningDataEnd; + + pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + + pRunningData = (const char*)pRawData; + pRunningDataEnd = (const char*)pRawData + blockSize; + + metadata.data.picture.type = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.mimeLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + + /* Need space for the rest of the block */ + if ((pRunningDataEnd - pRunningData) - 24 < (drflac_int64)metadata.data.picture.mimeLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + metadata.data.picture.mime = pRunningData; pRunningData += metadata.data.picture.mimeLength; + metadata.data.picture.descriptionLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + + /* Need space for the rest of the block */ + if ((pRunningDataEnd - pRunningData) - 20 < (drflac_int64)metadata.data.picture.descriptionLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + metadata.data.picture.description = pRunningData; pRunningData += metadata.data.picture.descriptionLength; + metadata.data.picture.width = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.height = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.colorDepth = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.indexColorCount = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.pictureDataSize = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + metadata.data.picture.pPictureData = (const drflac_uint8*)pRunningData; + + /* Need space for the picture after the block */ + if (pRunningDataEnd - pRunningData < (drflac_int64)metadata.data.picture.pictureDataSize) { /* <-- Note the order of operations to avoid overflow to a valid value */ + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_PADDING: + { + if (onMeta) { + metadata.data.padding.unused = 0; + + /* Padding doesn't have anything meaningful in it, so just skip over it, but make sure the caller is aware of it by firing the callback. */ + if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { + isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ + } else { + onMeta(pUserDataMD, &metadata); + } + } + } break; + + case DRFLAC_METADATA_BLOCK_TYPE_INVALID: + { + /* Invalid chunk. Just skip over this one. */ + if (onMeta) { + if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { + isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ + } + } + } break; + + default: + { + /* + It's an unknown chunk, but not necessarily invalid. There's a chance more metadata blocks might be defined later on, so we + can at the very least report the chunk to the application and let it look at the raw data. + */ + if (onMeta) { + void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); + if (pRawData == NULL) { + return DRFLAC_FALSE; + } + + if (onRead(pUserData, pRawData, blockSize) != blockSize) { + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + return DRFLAC_FALSE; + } + + metadata.pRawData = pRawData; + metadata.rawDataSize = blockSize; + onMeta(pUserDataMD, &metadata); + + drflac__free_from_callbacks(pRawData, pAllocationCallbacks); + } + } break; + } + + /* If we're not handling metadata, just skip over the block. If we are, it will have been handled earlier in the switch statement above. */ + if (onMeta == NULL && blockSize > 0) { + if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { + isLastBlock = DRFLAC_TRUE; + } + } + + runningFilePos += blockSize; + if (isLastBlock) { + break; + } + } + + *pSeektablePos = seektablePos; + *pSeektableSize = seektableSize; + *pFirstFramePos = runningFilePos; + + return DRFLAC_TRUE; +} + +static drflac_bool32 drflac__init_private__native(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) +{ + /* Pre Condition: The bit stream should be sitting just past the 4-byte id header. */ + + drflac_uint8 isLastBlock; + drflac_uint8 blockType; + drflac_uint32 blockSize; + + (void)onSeek; + + pInit->container = drflac_container_native; + + /* The first metadata block should be the STREAMINFO block. */ + if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { + return DRFLAC_FALSE; + } + + if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { + if (!relaxed) { + /* We're opening in strict mode and the first block is not the STREAMINFO block. Error. */ + return DRFLAC_FALSE; + } else { + /* + Relaxed mode. To open from here we need to just find the first frame and set the sample rate, etc. to whatever is defined + for that frame. + */ + pInit->hasStreamInfoBlock = DRFLAC_FALSE; + pInit->hasMetadataBlocks = DRFLAC_FALSE; + + if (!drflac__read_next_flac_frame_header(&pInit->bs, 0, &pInit->firstFrameHeader)) { + return DRFLAC_FALSE; /* Couldn't find a frame. */ + } + + if (pInit->firstFrameHeader.bitsPerSample == 0) { + return DRFLAC_FALSE; /* Failed to initialize because the first frame depends on the STREAMINFO block, which does not exist. */ + } + + pInit->sampleRate = pInit->firstFrameHeader.sampleRate; + pInit->channels = drflac__get_channel_count_from_channel_assignment(pInit->firstFrameHeader.channelAssignment); + pInit->bitsPerSample = pInit->firstFrameHeader.bitsPerSample; + pInit->maxBlockSizeInPCMFrames = 65535; /* <-- See notes here: https://xiph.org/flac/format.html#metadata_block_streaminfo */ + return DRFLAC_TRUE; + } + } else { + drflac_streaminfo streaminfo; + if (!drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { + return DRFLAC_FALSE; + } + + pInit->hasStreamInfoBlock = DRFLAC_TRUE; + pInit->sampleRate = streaminfo.sampleRate; + pInit->channels = streaminfo.channels; + pInit->bitsPerSample = streaminfo.bitsPerSample; + pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; + pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; /* Don't care about the min block size - only the max (used for determining the size of the memory allocation). */ + pInit->hasMetadataBlocks = !isLastBlock; + + if (onMeta) { + drflac_metadata metadata; + metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; + metadata.pRawData = NULL; + metadata.rawDataSize = 0; + metadata.data.streaminfo = streaminfo; + onMeta(pUserDataMD, &metadata); + } + + return DRFLAC_TRUE; + } +} + +#ifndef DR_FLAC_NO_OGG +#define DRFLAC_OGG_MAX_PAGE_SIZE 65307 +#define DRFLAC_OGG_CAPTURE_PATTERN_CRC32 1605413199 /* CRC-32 of "OggS". */ + +typedef enum +{ + drflac_ogg_recover_on_crc_mismatch, + drflac_ogg_fail_on_crc_mismatch +} drflac_ogg_crc_mismatch_recovery; + +#ifndef DR_FLAC_NO_CRC +static drflac_uint32 drflac__crc32_table[] = { + 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, + 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, + 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, + 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, + 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, + 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, + 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, + 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, + 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, + 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, + 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, + 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, + 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, + 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, + 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, + 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, + 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, + 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, + 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, + 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, + 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, + 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, + 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, + 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, + 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, + 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, + 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, + 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, + 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, + 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, + 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, + 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, + 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, + 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, + 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, + 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, + 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, + 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, + 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, + 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, + 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, + 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, + 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, + 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, + 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, + 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, + 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, + 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, + 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, + 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, + 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, + 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, + 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, + 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, + 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, + 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, + 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, + 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, + 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, + 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, + 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, + 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, + 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, + 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L +}; +#endif + +static DRFLAC_INLINE drflac_uint32 drflac_crc32_byte(drflac_uint32 crc32, drflac_uint8 data) +{ +#ifndef DR_FLAC_NO_CRC + return (crc32 << 8) ^ drflac__crc32_table[(drflac_uint8)((crc32 >> 24) & 0xFF) ^ data]; +#else + (void)data; + return crc32; +#endif +} + +#if 0 +static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint32(drflac_uint32 crc32, drflac_uint32 data) +{ + crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 24) & 0xFF)); + crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 16) & 0xFF)); + crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 8) & 0xFF)); + crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 0) & 0xFF)); + return crc32; +} + +static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint64(drflac_uint32 crc32, drflac_uint64 data) +{ + crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 32) & 0xFFFFFFFF)); + crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 0) & 0xFFFFFFFF)); + return crc32; +} +#endif + +static DRFLAC_INLINE drflac_uint32 drflac_crc32_buffer(drflac_uint32 crc32, drflac_uint8* pData, drflac_uint32 dataSize) +{ + /* This can be optimized. */ + drflac_uint32 i; + for (i = 0; i < dataSize; ++i) { + crc32 = drflac_crc32_byte(crc32, pData[i]); + } + return crc32; +} + + +static DRFLAC_INLINE drflac_bool32 drflac_ogg__is_capture_pattern(drflac_uint8 pattern[4]) +{ + return pattern[0] == 'O' && pattern[1] == 'g' && pattern[2] == 'g' && pattern[3] == 'S'; +} + +static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_header_size(drflac_ogg_page_header* pHeader) +{ + return 27 + pHeader->segmentCount; +} + +static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_body_size(drflac_ogg_page_header* pHeader) +{ + drflac_uint32 pageBodySize = 0; + int i; + + for (i = 0; i < pHeader->segmentCount; ++i) { + pageBodySize += pHeader->segmentTable[i]; + } + + return pageBodySize; +} + +static drflac_result drflac_ogg__read_page_header_after_capture_pattern(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) +{ + drflac_uint8 data[23]; + drflac_uint32 i; + + DRFLAC_ASSERT(*pCRC32 == DRFLAC_OGG_CAPTURE_PATTERN_CRC32); + + if (onRead(pUserData, data, 23) != 23) { + return DRFLAC_AT_END; + } + *pBytesRead += 23; + + /* + It's not actually used, but set the capture pattern to 'OggS' for completeness. Not doing this will cause static analysers to complain about + us trying to access uninitialized data. We could alternatively just comment out this member of the drflac_ogg_page_header structure, but I + like to have it map to the structure of the underlying data. + */ + pHeader->capturePattern[0] = 'O'; + pHeader->capturePattern[1] = 'g'; + pHeader->capturePattern[2] = 'g'; + pHeader->capturePattern[3] = 'S'; + + pHeader->structureVersion = data[0]; + pHeader->headerType = data[1]; + DRFLAC_COPY_MEMORY(&pHeader->granulePosition, &data[ 2], 8); + DRFLAC_COPY_MEMORY(&pHeader->serialNumber, &data[10], 4); + DRFLAC_COPY_MEMORY(&pHeader->sequenceNumber, &data[14], 4); + DRFLAC_COPY_MEMORY(&pHeader->checksum, &data[18], 4); + pHeader->segmentCount = data[22]; + + /* Calculate the CRC. Note that for the calculation the checksum part of the page needs to be set to 0. */ + data[18] = 0; + data[19] = 0; + data[20] = 0; + data[21] = 0; + + for (i = 0; i < 23; ++i) { + *pCRC32 = drflac_crc32_byte(*pCRC32, data[i]); + } + + + if (onRead(pUserData, pHeader->segmentTable, pHeader->segmentCount) != pHeader->segmentCount) { + return DRFLAC_AT_END; + } + *pBytesRead += pHeader->segmentCount; + + for (i = 0; i < pHeader->segmentCount; ++i) { + *pCRC32 = drflac_crc32_byte(*pCRC32, pHeader->segmentTable[i]); + } + + return DRFLAC_SUCCESS; +} + +static drflac_result drflac_ogg__read_page_header(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) +{ + drflac_uint8 id[4]; + + *pBytesRead = 0; + + if (onRead(pUserData, id, 4) != 4) { + return DRFLAC_AT_END; + } + *pBytesRead += 4; + + /* We need to read byte-by-byte until we find the OggS capture pattern. */ + for (;;) { + if (drflac_ogg__is_capture_pattern(id)) { + drflac_result result; + + *pCRC32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; + + result = drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, pHeader, pBytesRead, pCRC32); + if (result == DRFLAC_SUCCESS) { + return DRFLAC_SUCCESS; + } else { + if (result == DRFLAC_CRC_MISMATCH) { + continue; + } else { + return result; + } + } + } else { + /* The first 4 bytes did not equal the capture pattern. Read the next byte and try again. */ + id[0] = id[1]; + id[1] = id[2]; + id[2] = id[3]; + if (onRead(pUserData, &id[3], 1) != 1) { + return DRFLAC_AT_END; + } + *pBytesRead += 1; + } + } +} + + +/* +The main part of the Ogg encapsulation is the conversion from the physical Ogg bitstream to the native FLAC bitstream. It works +in three general stages: Ogg Physical Bitstream -> Ogg/FLAC Logical Bitstream -> FLAC Native Bitstream. dr_flac is designed +in such a way that the core sections assume everything is delivered in native format. Therefore, for each encapsulation type +dr_flac is supporting there needs to be a layer sitting on top of the onRead and onSeek callbacks that ensures the bits read from +the physical Ogg bitstream are converted and delivered in native FLAC format. +*/ +typedef struct +{ + drflac_read_proc onRead; /* The original onRead callback from drflac_open() and family. */ + drflac_seek_proc onSeek; /* The original onSeek callback from drflac_open() and family. */ + void* pUserData; /* The user data passed on onRead and onSeek. This is the user data that was passed on drflac_open() and family. */ + drflac_uint64 currentBytePos; /* The position of the byte we are sitting on in the physical byte stream. Used for efficient seeking. */ + drflac_uint64 firstBytePos; /* The position of the first byte in the physical bitstream. Points to the start of the "OggS" identifier of the FLAC bos page. */ + drflac_uint32 serialNumber; /* The serial number of the FLAC audio pages. This is determined by the initial header page that was read during initialization. */ + drflac_ogg_page_header bosPageHeader; /* Used for seeking. */ + drflac_ogg_page_header currentPageHeader; + drflac_uint32 bytesRemainingInPage; + drflac_uint32 pageDataSize; + drflac_uint8 pageData[DRFLAC_OGG_MAX_PAGE_SIZE]; +} drflac_oggbs; /* oggbs = Ogg Bitstream */ + +static size_t drflac_oggbs__read_physical(drflac_oggbs* oggbs, void* bufferOut, size_t bytesToRead) +{ + size_t bytesActuallyRead = oggbs->onRead(oggbs->pUserData, bufferOut, bytesToRead); + oggbs->currentBytePos += bytesActuallyRead; + + return bytesActuallyRead; +} + +static drflac_bool32 drflac_oggbs__seek_physical(drflac_oggbs* oggbs, drflac_uint64 offset, drflac_seek_origin origin) +{ + if (origin == drflac_seek_origin_start) { + if (offset <= 0x7FFFFFFF) { + if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_start)) { + return DRFLAC_FALSE; + } + oggbs->currentBytePos = offset; + + return DRFLAC_TRUE; + } else { + if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { + return DRFLAC_FALSE; + } + oggbs->currentBytePos = offset; + + return drflac_oggbs__seek_physical(oggbs, offset - 0x7FFFFFFF, drflac_seek_origin_current); + } + } else { + while (offset > 0x7FFFFFFF) { + if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + oggbs->currentBytePos += 0x7FFFFFFF; + offset -= 0x7FFFFFFF; + } + + if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_current)) { /* <-- Safe cast thanks to the loop above. */ + return DRFLAC_FALSE; + } + oggbs->currentBytePos += offset; + + return DRFLAC_TRUE; + } +} + +static drflac_bool32 drflac_oggbs__goto_next_page(drflac_oggbs* oggbs, drflac_ogg_crc_mismatch_recovery recoveryMethod) +{ + drflac_ogg_page_header header; + for (;;) { + drflac_uint32 crc32 = 0; + drflac_uint32 bytesRead; + drflac_uint32 pageBodySize; +#ifndef DR_FLAC_NO_CRC + drflac_uint32 actualCRC32; +#endif + + if (drflac_ogg__read_page_header(oggbs->onRead, oggbs->pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { + return DRFLAC_FALSE; + } + oggbs->currentBytePos += bytesRead; + + pageBodySize = drflac_ogg__get_page_body_size(&header); + if (pageBodySize > DRFLAC_OGG_MAX_PAGE_SIZE) { + continue; /* Invalid page size. Assume it's corrupted and just move to the next page. */ + } + + if (header.serialNumber != oggbs->serialNumber) { + /* It's not a FLAC page. Skip it. */ + if (pageBodySize > 0 && !drflac_oggbs__seek_physical(oggbs, pageBodySize, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + continue; + } + + + /* We need to read the entire page and then do a CRC check on it. If there's a CRC mismatch we need to skip this page. */ + if (drflac_oggbs__read_physical(oggbs, oggbs->pageData, pageBodySize) != pageBodySize) { + return DRFLAC_FALSE; + } + oggbs->pageDataSize = pageBodySize; + +#ifndef DR_FLAC_NO_CRC + actualCRC32 = drflac_crc32_buffer(crc32, oggbs->pageData, oggbs->pageDataSize); + if (actualCRC32 != header.checksum) { + if (recoveryMethod == drflac_ogg_recover_on_crc_mismatch) { + continue; /* CRC mismatch. Skip this page. */ + } else { + /* + Even though we are failing on a CRC mismatch, we still want our stream to be in a good state. Therefore we + go to the next valid page to ensure we're in a good state, but return false to let the caller know that the + seek did not fully complete. + */ + drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch); + return DRFLAC_FALSE; + } + } +#else + (void)recoveryMethod; /* <-- Silence a warning. */ +#endif + + oggbs->currentPageHeader = header; + oggbs->bytesRemainingInPage = pageBodySize; + return DRFLAC_TRUE; + } +} + +/* Function below is unused at the moment, but I might be re-adding it later. */ +#if 0 +static drflac_uint8 drflac_oggbs__get_current_segment_index(drflac_oggbs* oggbs, drflac_uint8* pBytesRemainingInSeg) +{ + drflac_uint32 bytesConsumedInPage = drflac_ogg__get_page_body_size(&oggbs->currentPageHeader) - oggbs->bytesRemainingInPage; + drflac_uint8 iSeg = 0; + drflac_uint32 iByte = 0; + while (iByte < bytesConsumedInPage) { + drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; + if (iByte + segmentSize > bytesConsumedInPage) { + break; + } else { + iSeg += 1; + iByte += segmentSize; + } + } + + *pBytesRemainingInSeg = oggbs->currentPageHeader.segmentTable[iSeg] - (drflac_uint8)(bytesConsumedInPage - iByte); + return iSeg; +} + +static drflac_bool32 drflac_oggbs__seek_to_next_packet(drflac_oggbs* oggbs) +{ + /* The current packet ends when we get to the segment with a lacing value of < 255 which is not at the end of a page. */ + for (;;) { + drflac_bool32 atEndOfPage = DRFLAC_FALSE; + + drflac_uint8 bytesRemainingInSeg; + drflac_uint8 iFirstSeg = drflac_oggbs__get_current_segment_index(oggbs, &bytesRemainingInSeg); + + drflac_uint32 bytesToEndOfPacketOrPage = bytesRemainingInSeg; + for (drflac_uint8 iSeg = iFirstSeg; iSeg < oggbs->currentPageHeader.segmentCount; ++iSeg) { + drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; + if (segmentSize < 255) { + if (iSeg == oggbs->currentPageHeader.segmentCount-1) { + atEndOfPage = DRFLAC_TRUE; + } + + break; + } + + bytesToEndOfPacketOrPage += segmentSize; + } + + /* + At this point we will have found either the packet or the end of the page. If were at the end of the page we'll + want to load the next page and keep searching for the end of the packet. + */ + drflac_oggbs__seek_physical(oggbs, bytesToEndOfPacketOrPage, drflac_seek_origin_current); + oggbs->bytesRemainingInPage -= bytesToEndOfPacketOrPage; + + if (atEndOfPage) { + /* + We're potentially at the next packet, but we need to check the next page first to be sure because the packet may + straddle pages. + */ + if (!drflac_oggbs__goto_next_page(oggbs)) { + return DRFLAC_FALSE; + } + + /* If it's a fresh packet it most likely means we're at the next packet. */ + if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { + return DRFLAC_TRUE; + } + } else { + /* We're at the next packet. */ + return DRFLAC_TRUE; + } + } +} + +static drflac_bool32 drflac_oggbs__seek_to_next_frame(drflac_oggbs* oggbs) +{ + /* The bitstream should be sitting on the first byte just after the header of the frame. */ + + /* What we're actually doing here is seeking to the start of the next packet. */ + return drflac_oggbs__seek_to_next_packet(oggbs); +} +#endif + +static size_t drflac__on_read_ogg(void* pUserData, void* bufferOut, size_t bytesToRead) +{ + drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; + drflac_uint8* pRunningBufferOut = (drflac_uint8*)bufferOut; + size_t bytesRead = 0; + + DRFLAC_ASSERT(oggbs != NULL); + DRFLAC_ASSERT(pRunningBufferOut != NULL); + + /* Reading is done page-by-page. If we've run out of bytes in the page we need to move to the next one. */ + while (bytesRead < bytesToRead) { + size_t bytesRemainingToRead = bytesToRead - bytesRead; + + if (oggbs->bytesRemainingInPage >= bytesRemainingToRead) { + DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), bytesRemainingToRead); + bytesRead += bytesRemainingToRead; + oggbs->bytesRemainingInPage -= (drflac_uint32)bytesRemainingToRead; + break; + } + + /* If we get here it means some of the requested data is contained in the next pages. */ + if (oggbs->bytesRemainingInPage > 0) { + DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), oggbs->bytesRemainingInPage); + bytesRead += oggbs->bytesRemainingInPage; + pRunningBufferOut += oggbs->bytesRemainingInPage; + oggbs->bytesRemainingInPage = 0; + } + + DRFLAC_ASSERT(bytesRemainingToRead > 0); + if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { + break; /* Failed to go to the next page. Might have simply hit the end of the stream. */ + } + } + + return bytesRead; +} + +static drflac_bool32 drflac__on_seek_ogg(void* pUserData, int offset, drflac_seek_origin origin) +{ + drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; + int bytesSeeked = 0; + + DRFLAC_ASSERT(oggbs != NULL); + DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ + + /* Seeking is always forward which makes things a lot simpler. */ + if (origin == drflac_seek_origin_start) { + if (!drflac_oggbs__seek_physical(oggbs, (int)oggbs->firstBytePos, drflac_seek_origin_start)) { + return DRFLAC_FALSE; + } + + if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { + return DRFLAC_FALSE; + } + + return drflac__on_seek_ogg(pUserData, offset, drflac_seek_origin_current); + } + + DRFLAC_ASSERT(origin == drflac_seek_origin_current); + + while (bytesSeeked < offset) { + int bytesRemainingToSeek = offset - bytesSeeked; + DRFLAC_ASSERT(bytesRemainingToSeek >= 0); + + if (oggbs->bytesRemainingInPage >= (size_t)bytesRemainingToSeek) { + bytesSeeked += bytesRemainingToSeek; + (void)bytesSeeked; /* <-- Silence a dead store warning emitted by Clang Static Analyzer. */ + oggbs->bytesRemainingInPage -= bytesRemainingToSeek; + break; + } + + /* If we get here it means some of the requested data is contained in the next pages. */ + if (oggbs->bytesRemainingInPage > 0) { + bytesSeeked += (int)oggbs->bytesRemainingInPage; + oggbs->bytesRemainingInPage = 0; + } + + DRFLAC_ASSERT(bytesRemainingToSeek > 0); + if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { + /* Failed to go to the next page. We either hit the end of the stream or had a CRC mismatch. */ + return DRFLAC_FALSE; + } + } + + return DRFLAC_TRUE; +} + + +static drflac_bool32 drflac_ogg__seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) +{ + drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; + drflac_uint64 originalBytePos; + drflac_uint64 runningGranulePosition; + drflac_uint64 runningFrameBytePos; + drflac_uint64 runningPCMFrameCount; + + DRFLAC_ASSERT(oggbs != NULL); + + originalBytePos = oggbs->currentBytePos; /* For recovery. Points to the OggS identifier. */ + + /* First seek to the first frame. */ + if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes)) { + return DRFLAC_FALSE; + } + oggbs->bytesRemainingInPage = 0; + + runningGranulePosition = 0; + for (;;) { + if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { + drflac_oggbs__seek_physical(oggbs, originalBytePos, drflac_seek_origin_start); + return DRFLAC_FALSE; /* Never did find that sample... */ + } + + runningFrameBytePos = oggbs->currentBytePos - drflac_ogg__get_page_header_size(&oggbs->currentPageHeader) - oggbs->pageDataSize; + if (oggbs->currentPageHeader.granulePosition >= pcmFrameIndex) { + break; /* The sample is somewhere in the previous page. */ + } + + /* + At this point we know the sample is not in the previous page. It could possibly be in this page. For simplicity we + disregard any pages that do not begin a fresh packet. + */ + if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { /* <-- Is it a fresh page? */ + if (oggbs->currentPageHeader.segmentTable[0] >= 2) { + drflac_uint8 firstBytesInPage[2]; + firstBytesInPage[0] = oggbs->pageData[0]; + firstBytesInPage[1] = oggbs->pageData[1]; + + if ((firstBytesInPage[0] == 0xFF) && (firstBytesInPage[1] & 0xFC) == 0xF8) { /* <-- Does the page begin with a frame's sync code? */ + runningGranulePosition = oggbs->currentPageHeader.granulePosition; + } + + continue; + } + } + } + + /* + We found the page that that is closest to the sample, so now we need to find it. The first thing to do is seek to the + start of that page. In the loop above we checked that it was a fresh page which means this page is also the start of + a new frame. This property means that after we've seeked to the page we can immediately start looping over frames until + we find the one containing the target sample. + */ + if (!drflac_oggbs__seek_physical(oggbs, runningFrameBytePos, drflac_seek_origin_start)) { + return DRFLAC_FALSE; + } + if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { + return DRFLAC_FALSE; + } + + /* + At this point we'll be sitting on the first byte of the frame header of the first frame in the page. We just keep + looping over these frames until we find the one containing the sample we're after. + */ + runningPCMFrameCount = runningGranulePosition; + for (;;) { + /* + There are two ways to find the sample and seek past irrelevant frames: + 1) Use the native FLAC decoder. + 2) Use Ogg's framing system. + + Both of these options have their own pros and cons. Using the native FLAC decoder is slower because it needs to + do a full decode of the frame. Using Ogg's framing system is faster, but more complicated and involves some code + duplication for the decoding of frame headers. + + Another thing to consider is that using the Ogg framing system will perform direct seeking of the physical Ogg + bitstream. This is important to consider because it means we cannot read data from the drflac_bs object using the + standard drflac__*() APIs because that will read in extra data for its own internal caching which in turn breaks + the positioning of the read pointer of the physical Ogg bitstream. Therefore, anything that would normally be read + using the native FLAC decoding APIs, such as drflac__read_next_flac_frame_header(), need to be re-implemented so as to + avoid the use of the drflac_bs object. + + Considering these issues, I have decided to use the slower native FLAC decoding method for the following reasons: + 1) Seeking is already partially accelerated using Ogg's paging system in the code block above. + 2) Seeking in an Ogg encapsulated FLAC stream is probably quite uncommon. + 3) Simplicity. + */ + drflac_uint64 firstPCMFrameInFLACFrame = 0; + drflac_uint64 lastPCMFrameInFLACFrame = 0; + drflac_uint64 pcmFrameCountInThisFrame; + + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + return DRFLAC_FALSE; + } + + drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); + + pcmFrameCountInThisFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; + + /* If we are seeking to the end of the file and we've just hit it, we're done. */ + if (pcmFrameIndex == pFlac->totalPCMFrameCount && (runningPCMFrameCount + pcmFrameCountInThisFrame) == pFlac->totalPCMFrameCount) { + drflac_result result = drflac__decode_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + pFlac->currentPCMFrame = pcmFrameIndex; + pFlac->currentFLACFrame.pcmFramesRemaining = 0; + return DRFLAC_TRUE; + } else { + return DRFLAC_FALSE; + } + } + + if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFrame)) { + /* + The sample should be in this FLAC frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend + it never existed and keep iterating. + */ + drflac_result result = drflac__decode_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ + drflac_uint64 pcmFramesToDecode = (size_t)(pcmFrameIndex - runningPCMFrameCount); /* <-- Safe cast because the maximum number of samples in a frame is 65535. */ + if (pcmFramesToDecode == 0) { + return DRFLAC_TRUE; + } + + pFlac->currentPCMFrame = runningPCMFrameCount; + + return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ + } else { + if (result == DRFLAC_CRC_MISMATCH) { + continue; /* CRC mismatch. Pretend this frame never existed. */ + } else { + return DRFLAC_FALSE; + } + } + } else { + /* + It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this + frame never existed and leave the running sample count untouched. + */ + drflac_result result = drflac__seek_to_next_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + runningPCMFrameCount += pcmFrameCountInThisFrame; + } else { + if (result == DRFLAC_CRC_MISMATCH) { + continue; /* CRC mismatch. Pretend this frame never existed. */ + } else { + return DRFLAC_FALSE; + } + } + } + } +} + + + +static drflac_bool32 drflac__init_private__ogg(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) +{ + drflac_ogg_page_header header; + drflac_uint32 crc32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; + drflac_uint32 bytesRead = 0; + + /* Pre Condition: The bit stream should be sitting just past the 4-byte OggS capture pattern. */ + (void)relaxed; + + pInit->container = drflac_container_ogg; + pInit->oggFirstBytePos = 0; + + /* + We'll get here if the first 4 bytes of the stream were the OggS capture pattern, however it doesn't necessarily mean the + stream includes FLAC encoded audio. To check for this we need to scan the beginning-of-stream page markers and check if + any match the FLAC specification. Important to keep in mind that the stream may be multiplexed. + */ + if (drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { + return DRFLAC_FALSE; + } + pInit->runningFilePos += bytesRead; + + for (;;) { + int pageBodySize; + + /* Break if we're past the beginning of stream page. */ + if ((header.headerType & 0x02) == 0) { + return DRFLAC_FALSE; + } + + /* Check if it's a FLAC header. */ + pageBodySize = drflac_ogg__get_page_body_size(&header); + if (pageBodySize == 51) { /* 51 = the lacing value of the FLAC header packet. */ + /* It could be a FLAC page... */ + drflac_uint32 bytesRemainingInPage = pageBodySize; + drflac_uint8 packetType; + + if (onRead(pUserData, &packetType, 1) != 1) { + return DRFLAC_FALSE; + } + + bytesRemainingInPage -= 1; + if (packetType == 0x7F) { + /* Increasingly more likely to be a FLAC page... */ + drflac_uint8 sig[4]; + if (onRead(pUserData, sig, 4) != 4) { + return DRFLAC_FALSE; + } + + bytesRemainingInPage -= 4; + if (sig[0] == 'F' && sig[1] == 'L' && sig[2] == 'A' && sig[3] == 'C') { + /* Almost certainly a FLAC page... */ + drflac_uint8 mappingVersion[2]; + if (onRead(pUserData, mappingVersion, 2) != 2) { + return DRFLAC_FALSE; + } + + if (mappingVersion[0] != 1) { + return DRFLAC_FALSE; /* Only supporting version 1.x of the Ogg mapping. */ + } + + /* + The next 2 bytes are the non-audio packets, not including this one. We don't care about this because we're going to + be handling it in a generic way based on the serial number and packet types. + */ + if (!onSeek(pUserData, 2, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + + /* Expecting the native FLAC signature "fLaC". */ + if (onRead(pUserData, sig, 4) != 4) { + return DRFLAC_FALSE; + } + + if (sig[0] == 'f' && sig[1] == 'L' && sig[2] == 'a' && sig[3] == 'C') { + /* The remaining data in the page should be the STREAMINFO block. */ + drflac_streaminfo streaminfo; + drflac_uint8 isLastBlock; + drflac_uint8 blockType; + drflac_uint32 blockSize; + if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { + return DRFLAC_FALSE; + } + + if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { + return DRFLAC_FALSE; /* Invalid block type. First block must be the STREAMINFO block. */ + } + + if (drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { + /* Success! */ + pInit->hasStreamInfoBlock = DRFLAC_TRUE; + pInit->sampleRate = streaminfo.sampleRate; + pInit->channels = streaminfo.channels; + pInit->bitsPerSample = streaminfo.bitsPerSample; + pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; + pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; + pInit->hasMetadataBlocks = !isLastBlock; + + if (onMeta) { + drflac_metadata metadata; + metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; + metadata.pRawData = NULL; + metadata.rawDataSize = 0; + metadata.data.streaminfo = streaminfo; + onMeta(pUserDataMD, &metadata); + } + + pInit->runningFilePos += pageBodySize; + pInit->oggFirstBytePos = pInit->runningFilePos - 79; /* Subtracting 79 will place us right on top of the "OggS" identifier of the FLAC bos page. */ + pInit->oggSerial = header.serialNumber; + pInit->oggBosHeader = header; + break; + } else { + /* Failed to read STREAMINFO block. Aww, so close... */ + return DRFLAC_FALSE; + } + } else { + /* Invalid file. */ + return DRFLAC_FALSE; + } + } else { + /* Not a FLAC header. Skip it. */ + if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + } + } else { + /* Not a FLAC header. Seek past the entire page and move on to the next. */ + if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + } + } else { + if (!onSeek(pUserData, pageBodySize, drflac_seek_origin_current)) { + return DRFLAC_FALSE; + } + } + + pInit->runningFilePos += pageBodySize; + + + /* Read the header of the next page. */ + if (drflac_ogg__read_page_header(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { + return DRFLAC_FALSE; + } + pInit->runningFilePos += bytesRead; + } + + /* + If we get here it means we found a FLAC audio stream. We should be sitting on the first byte of the header of the next page. The next + packets in the FLAC logical stream contain the metadata. The only thing left to do in the initialization phase for Ogg is to create the + Ogg bistream object. + */ + pInit->hasMetadataBlocks = DRFLAC_TRUE; /* <-- Always have at least VORBIS_COMMENT metadata block. */ + return DRFLAC_TRUE; +} +#endif + +static drflac_bool32 drflac__init_private(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD) +{ + drflac_bool32 relaxed; + drflac_uint8 id[4]; + + if (pInit == NULL || onRead == NULL || onSeek == NULL) { + return DRFLAC_FALSE; + } + + DRFLAC_ZERO_MEMORY(pInit, sizeof(*pInit)); + pInit->onRead = onRead; + pInit->onSeek = onSeek; + pInit->onMeta = onMeta; + pInit->container = container; + pInit->pUserData = pUserData; + pInit->pUserDataMD = pUserDataMD; + + pInit->bs.onRead = onRead; + pInit->bs.onSeek = onSeek; + pInit->bs.pUserData = pUserData; + drflac__reset_cache(&pInit->bs); + + + /* If the container is explicitly defined then we can try opening in relaxed mode. */ + relaxed = container != drflac_container_unknown; + + /* Skip over any ID3 tags. */ + for (;;) { + if (onRead(pUserData, id, 4) != 4) { + return DRFLAC_FALSE; /* Ran out of data. */ + } + pInit->runningFilePos += 4; + + if (id[0] == 'I' && id[1] == 'D' && id[2] == '3') { + drflac_uint8 header[6]; + drflac_uint8 flags; + drflac_uint32 headerSize; + + if (onRead(pUserData, header, 6) != 6) { + return DRFLAC_FALSE; /* Ran out of data. */ + } + pInit->runningFilePos += 6; + + flags = header[1]; + + DRFLAC_COPY_MEMORY(&headerSize, header+2, 4); + headerSize = drflac__unsynchsafe_32(drflac__be2host_32(headerSize)); + if (flags & 0x10) { + headerSize += 10; + } + + if (!onSeek(pUserData, headerSize, drflac_seek_origin_current)) { + return DRFLAC_FALSE; /* Failed to seek past the tag. */ + } + pInit->runningFilePos += headerSize; + } else { + break; + } + } + + if (id[0] == 'f' && id[1] == 'L' && id[2] == 'a' && id[3] == 'C') { + return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); + } +#ifndef DR_FLAC_NO_OGG + if (id[0] == 'O' && id[1] == 'g' && id[2] == 'g' && id[3] == 'S') { + return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); + } +#endif + + /* If we get here it means we likely don't have a header. Try opening in relaxed mode, if applicable. */ + if (relaxed) { + if (container == drflac_container_native) { + return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); + } +#ifndef DR_FLAC_NO_OGG + if (container == drflac_container_ogg) { + return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); + } +#endif + } + + /* Unsupported container. */ + return DRFLAC_FALSE; +} + +static void drflac__init_from_info(drflac* pFlac, const drflac_init_info* pInit) +{ + DRFLAC_ASSERT(pFlac != NULL); + DRFLAC_ASSERT(pInit != NULL); + + DRFLAC_ZERO_MEMORY(pFlac, sizeof(*pFlac)); + pFlac->bs = pInit->bs; + pFlac->onMeta = pInit->onMeta; + pFlac->pUserDataMD = pInit->pUserDataMD; + pFlac->maxBlockSizeInPCMFrames = pInit->maxBlockSizeInPCMFrames; + pFlac->sampleRate = pInit->sampleRate; + pFlac->channels = (drflac_uint8)pInit->channels; + pFlac->bitsPerSample = (drflac_uint8)pInit->bitsPerSample; + pFlac->totalPCMFrameCount = pInit->totalPCMFrameCount; + pFlac->container = pInit->container; +} + + +static drflac* drflac_open_with_metadata_private(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac_init_info init; + drflac_uint32 allocationSize; + drflac_uint32 wholeSIMDVectorCountPerChannel; + drflac_uint32 decodedSamplesAllocationSize; +#ifndef DR_FLAC_NO_OGG + drflac_oggbs oggbs; +#endif + drflac_uint64 firstFramePos; + drflac_uint64 seektablePos; + drflac_uint32 seektableSize; + drflac_allocation_callbacks allocationCallbacks; + drflac* pFlac; + + /* CPU support first. */ + drflac__init_cpu_caps(); + + if (!drflac__init_private(&init, onRead, onSeek, onMeta, container, pUserData, pUserDataMD)) { + return NULL; + } + + if (pAllocationCallbacks != NULL) { + allocationCallbacks = *pAllocationCallbacks; + if (allocationCallbacks.onFree == NULL || (allocationCallbacks.onMalloc == NULL && allocationCallbacks.onRealloc == NULL)) { + return NULL; /* Invalid allocation callbacks. */ + } + } else { + allocationCallbacks.pUserData = NULL; + allocationCallbacks.onMalloc = drflac__malloc_default; + allocationCallbacks.onRealloc = drflac__realloc_default; + allocationCallbacks.onFree = drflac__free_default; + } + + + /* + The size of the allocation for the drflac object needs to be large enough to fit the following: + 1) The main members of the drflac structure + 2) A block of memory large enough to store the decoded samples of the largest frame in the stream + 3) If the container is Ogg, a drflac_oggbs object + + The complicated part of the allocation is making sure there's enough room the decoded samples, taking into consideration + the different SIMD instruction sets. + */ + allocationSize = sizeof(drflac); + + /* + The allocation size for decoded frames depends on the number of 32-bit integers that fit inside the largest SIMD vector + we are supporting. + */ + if ((init.maxBlockSizeInPCMFrames % (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) == 0) { + wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))); + } else { + wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) + 1; + } + + decodedSamplesAllocationSize = wholeSIMDVectorCountPerChannel * DRFLAC_MAX_SIMD_VECTOR_SIZE * init.channels; + + allocationSize += decodedSamplesAllocationSize; + allocationSize += DRFLAC_MAX_SIMD_VECTOR_SIZE; /* Allocate extra bytes to ensure we have enough for alignment. */ + +#ifndef DR_FLAC_NO_OGG + /* There's additional data required for Ogg streams. */ + if (init.container == drflac_container_ogg) { + allocationSize += sizeof(drflac_oggbs); + } + + DRFLAC_ZERO_MEMORY(&oggbs, sizeof(oggbs)); + if (init.container == drflac_container_ogg) { + oggbs.onRead = onRead; + oggbs.onSeek = onSeek; + oggbs.pUserData = pUserData; + oggbs.currentBytePos = init.oggFirstBytePos; + oggbs.firstBytePos = init.oggFirstBytePos; + oggbs.serialNumber = init.oggSerial; + oggbs.bosPageHeader = init.oggBosHeader; + oggbs.bytesRemainingInPage = 0; + } +#endif + + /* + This part is a bit awkward. We need to load the seektable so that it can be referenced in-memory, but I want the drflac object to + consist of only a single heap allocation. To this, the size of the seek table needs to be known, which we determine when reading + and decoding the metadata. + */ + firstFramePos = 42; /* <-- We know we are at byte 42 at this point. */ + seektablePos = 0; + seektableSize = 0; + if (init.hasMetadataBlocks) { + drflac_read_proc onReadOverride = onRead; + drflac_seek_proc onSeekOverride = onSeek; + void* pUserDataOverride = pUserData; + +#ifndef DR_FLAC_NO_OGG + if (init.container == drflac_container_ogg) { + onReadOverride = drflac__on_read_ogg; + onSeekOverride = drflac__on_seek_ogg; + pUserDataOverride = (void*)&oggbs; + } +#endif + + if (!drflac__read_and_decode_metadata(onReadOverride, onSeekOverride, onMeta, pUserDataOverride, pUserDataMD, &firstFramePos, &seektablePos, &seektableSize, &allocationCallbacks)) { + return NULL; + } + + allocationSize += seektableSize; + } + + + pFlac = (drflac*)drflac__malloc_from_callbacks(allocationSize, &allocationCallbacks); + if (pFlac == NULL) { + return NULL; + } + + drflac__init_from_info(pFlac, &init); + pFlac->allocationCallbacks = allocationCallbacks; + pFlac->pDecodedSamples = (drflac_int32*)drflac_align((size_t)pFlac->pExtraData, DRFLAC_MAX_SIMD_VECTOR_SIZE); + +#ifndef DR_FLAC_NO_OGG + if (init.container == drflac_container_ogg) { + drflac_oggbs* pInternalOggbs = (drflac_oggbs*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize + seektableSize); + *pInternalOggbs = oggbs; + + /* The Ogg bistream needs to be layered on top of the original bitstream. */ + pFlac->bs.onRead = drflac__on_read_ogg; + pFlac->bs.onSeek = drflac__on_seek_ogg; + pFlac->bs.pUserData = (void*)pInternalOggbs; + pFlac->_oggbs = (void*)pInternalOggbs; + } +#endif + + pFlac->firstFLACFramePosInBytes = firstFramePos; + + /* NOTE: Seektables are not currently compatible with Ogg encapsulation (Ogg has its own accelerated seeking system). I may change this later, so I'm leaving this here for now. */ +#ifndef DR_FLAC_NO_OGG + if (init.container == drflac_container_ogg) + { + pFlac->pSeekpoints = NULL; + pFlac->seekpointCount = 0; + } + else +#endif + { + /* If we have a seektable we need to load it now, making sure we move back to where we were previously. */ + if (seektablePos != 0) { + pFlac->seekpointCount = seektableSize / sizeof(*pFlac->pSeekpoints); + pFlac->pSeekpoints = (drflac_seekpoint*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize); + + DRFLAC_ASSERT(pFlac->bs.onSeek != NULL); + DRFLAC_ASSERT(pFlac->bs.onRead != NULL); + + /* Seek to the seektable, then just read directly into our seektable buffer. */ + if (pFlac->bs.onSeek(pFlac->bs.pUserData, (int)seektablePos, drflac_seek_origin_start)) { + if (pFlac->bs.onRead(pFlac->bs.pUserData, pFlac->pSeekpoints, seektableSize) == seektableSize) { + /* Endian swap. */ + drflac_uint32 iSeekpoint; + for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { + pFlac->pSeekpoints[iSeekpoint].firstPCMFrame = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].firstPCMFrame); + pFlac->pSeekpoints[iSeekpoint].flacFrameOffset = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].flacFrameOffset); + pFlac->pSeekpoints[iSeekpoint].pcmFrameCount = drflac__be2host_16(pFlac->pSeekpoints[iSeekpoint].pcmFrameCount); + } + } else { + /* Failed to read the seektable. Pretend we don't have one. */ + pFlac->pSeekpoints = NULL; + pFlac->seekpointCount = 0; + } + + /* We need to seek back to where we were. If this fails it's a critical error. */ + if (!pFlac->bs.onSeek(pFlac->bs.pUserData, (int)pFlac->firstFLACFramePosInBytes, drflac_seek_origin_start)) { + drflac__free_from_callbacks(pFlac, &allocationCallbacks); + return NULL; + } + } else { + /* Failed to seek to the seektable. Ominous sign, but for now we can just pretend we don't have one. */ + pFlac->pSeekpoints = NULL; + pFlac->seekpointCount = 0; + } + } + } + + + /* + If we get here, but don't have a STREAMINFO block, it means we've opened the stream in relaxed mode and need to decode + the first frame. + */ + if (!init.hasStreamInfoBlock) { + pFlac->currentFLACFrame.header = init.firstFrameHeader; + for (;;) { + drflac_result result = drflac__decode_flac_frame(pFlac); + if (result == DRFLAC_SUCCESS) { + break; + } else { + if (result == DRFLAC_CRC_MISMATCH) { + if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { + drflac__free_from_callbacks(pFlac, &allocationCallbacks); + return NULL; + } + continue; + } else { + drflac__free_from_callbacks(pFlac, &allocationCallbacks); + return NULL; + } + } + } + } + + return pFlac; +} + + + +#ifndef DR_FLAC_NO_STDIO +#include +#include /* For wcslen(), wcsrtombs() */ + +/* drflac_result_from_errno() is only used for fopen() and wfopen() so putting it inside DR_WAV_NO_STDIO for now. If something else needs this later we can move it out. */ +#include +static drflac_result drflac_result_from_errno(int e) +{ + switch (e) + { + case 0: return DRFLAC_SUCCESS; + #ifdef EPERM + case EPERM: return DRFLAC_INVALID_OPERATION; + #endif + #ifdef ENOENT + case ENOENT: return DRFLAC_DOES_NOT_EXIST; + #endif + #ifdef ESRCH + case ESRCH: return DRFLAC_DOES_NOT_EXIST; + #endif + #ifdef EINTR + case EINTR: return DRFLAC_INTERRUPT; + #endif + #ifdef EIO + case EIO: return DRFLAC_IO_ERROR; + #endif + #ifdef ENXIO + case ENXIO: return DRFLAC_DOES_NOT_EXIST; + #endif + #ifdef E2BIG + case E2BIG: return DRFLAC_INVALID_ARGS; + #endif + #ifdef ENOEXEC + case ENOEXEC: return DRFLAC_INVALID_FILE; + #endif + #ifdef EBADF + case EBADF: return DRFLAC_INVALID_FILE; + #endif + #ifdef ECHILD + case ECHILD: return DRFLAC_ERROR; + #endif + #ifdef EAGAIN + case EAGAIN: return DRFLAC_UNAVAILABLE; + #endif + #ifdef ENOMEM + case ENOMEM: return DRFLAC_OUT_OF_MEMORY; + #endif + #ifdef EACCES + case EACCES: return DRFLAC_ACCESS_DENIED; + #endif + #ifdef EFAULT + case EFAULT: return DRFLAC_BAD_ADDRESS; + #endif + #ifdef ENOTBLK + case ENOTBLK: return DRFLAC_ERROR; + #endif + #ifdef EBUSY + case EBUSY: return DRFLAC_BUSY; + #endif + #ifdef EEXIST + case EEXIST: return DRFLAC_ALREADY_EXISTS; + #endif + #ifdef EXDEV + case EXDEV: return DRFLAC_ERROR; + #endif + #ifdef ENODEV + case ENODEV: return DRFLAC_DOES_NOT_EXIST; + #endif + #ifdef ENOTDIR + case ENOTDIR: return DRFLAC_NOT_DIRECTORY; + #endif + #ifdef EISDIR + case EISDIR: return DRFLAC_IS_DIRECTORY; + #endif + #ifdef EINVAL + case EINVAL: return DRFLAC_INVALID_ARGS; + #endif + #ifdef ENFILE + case ENFILE: return DRFLAC_TOO_MANY_OPEN_FILES; + #endif + #ifdef EMFILE + case EMFILE: return DRFLAC_TOO_MANY_OPEN_FILES; + #endif + #ifdef ENOTTY + case ENOTTY: return DRFLAC_INVALID_OPERATION; + #endif + #ifdef ETXTBSY + case ETXTBSY: return DRFLAC_BUSY; + #endif + #ifdef EFBIG + case EFBIG: return DRFLAC_TOO_BIG; + #endif + #ifdef ENOSPC + case ENOSPC: return DRFLAC_NO_SPACE; + #endif + #ifdef ESPIPE + case ESPIPE: return DRFLAC_BAD_SEEK; + #endif + #ifdef EROFS + case EROFS: return DRFLAC_ACCESS_DENIED; + #endif + #ifdef EMLINK + case EMLINK: return DRFLAC_TOO_MANY_LINKS; + #endif + #ifdef EPIPE + case EPIPE: return DRFLAC_BAD_PIPE; + #endif + #ifdef EDOM + case EDOM: return DRFLAC_OUT_OF_RANGE; + #endif + #ifdef ERANGE + case ERANGE: return DRFLAC_OUT_OF_RANGE; + #endif + #ifdef EDEADLK + case EDEADLK: return DRFLAC_DEADLOCK; + #endif + #ifdef ENAMETOOLONG + case ENAMETOOLONG: return DRFLAC_PATH_TOO_LONG; + #endif + #ifdef ENOLCK + case ENOLCK: return DRFLAC_ERROR; + #endif + #ifdef ENOSYS + case ENOSYS: return DRFLAC_NOT_IMPLEMENTED; + #endif + #ifdef ENOTEMPTY + case ENOTEMPTY: return DRFLAC_DIRECTORY_NOT_EMPTY; + #endif + #ifdef ELOOP + case ELOOP: return DRFLAC_TOO_MANY_LINKS; + #endif + #ifdef ENOMSG + case ENOMSG: return DRFLAC_NO_MESSAGE; + #endif + #ifdef EIDRM + case EIDRM: return DRFLAC_ERROR; + #endif + #ifdef ECHRNG + case ECHRNG: return DRFLAC_ERROR; + #endif + #ifdef EL2NSYNC + case EL2NSYNC: return DRFLAC_ERROR; + #endif + #ifdef EL3HLT + case EL3HLT: return DRFLAC_ERROR; + #endif + #ifdef EL3RST + case EL3RST: return DRFLAC_ERROR; + #endif + #ifdef ELNRNG + case ELNRNG: return DRFLAC_OUT_OF_RANGE; + #endif + #ifdef EUNATCH + case EUNATCH: return DRFLAC_ERROR; + #endif + #ifdef ENOCSI + case ENOCSI: return DRFLAC_ERROR; + #endif + #ifdef EL2HLT + case EL2HLT: return DRFLAC_ERROR; + #endif + #ifdef EBADE + case EBADE: return DRFLAC_ERROR; + #endif + #ifdef EBADR + case EBADR: return DRFLAC_ERROR; + #endif + #ifdef EXFULL + case EXFULL: return DRFLAC_ERROR; + #endif + #ifdef ENOANO + case ENOANO: return DRFLAC_ERROR; + #endif + #ifdef EBADRQC + case EBADRQC: return DRFLAC_ERROR; + #endif + #ifdef EBADSLT + case EBADSLT: return DRFLAC_ERROR; + #endif + #ifdef EBFONT + case EBFONT: return DRFLAC_INVALID_FILE; + #endif + #ifdef ENOSTR + case ENOSTR: return DRFLAC_ERROR; + #endif + #ifdef ENODATA + case ENODATA: return DRFLAC_NO_DATA_AVAILABLE; + #endif + #ifdef ETIME + case ETIME: return DRFLAC_TIMEOUT; + #endif + #ifdef ENOSR + case ENOSR: return DRFLAC_NO_DATA_AVAILABLE; + #endif + #ifdef ENONET + case ENONET: return DRFLAC_NO_NETWORK; + #endif + #ifdef ENOPKG + case ENOPKG: return DRFLAC_ERROR; + #endif + #ifdef EREMOTE + case EREMOTE: return DRFLAC_ERROR; + #endif + #ifdef ENOLINK + case ENOLINK: return DRFLAC_ERROR; + #endif + #ifdef EADV + case EADV: return DRFLAC_ERROR; + #endif + #ifdef ESRMNT + case ESRMNT: return DRFLAC_ERROR; + #endif + #ifdef ECOMM + case ECOMM: return DRFLAC_ERROR; + #endif + #ifdef EPROTO + case EPROTO: return DRFLAC_ERROR; + #endif + #ifdef EMULTIHOP + case EMULTIHOP: return DRFLAC_ERROR; + #endif + #ifdef EDOTDOT + case EDOTDOT: return DRFLAC_ERROR; + #endif + #ifdef EBADMSG + case EBADMSG: return DRFLAC_BAD_MESSAGE; + #endif + #ifdef EOVERFLOW + case EOVERFLOW: return DRFLAC_TOO_BIG; + #endif + #ifdef ENOTUNIQ + case ENOTUNIQ: return DRFLAC_NOT_UNIQUE; + #endif + #ifdef EBADFD + case EBADFD: return DRFLAC_ERROR; + #endif + #ifdef EREMCHG + case EREMCHG: return DRFLAC_ERROR; + #endif + #ifdef ELIBACC + case ELIBACC: return DRFLAC_ACCESS_DENIED; + #endif + #ifdef ELIBBAD + case ELIBBAD: return DRFLAC_INVALID_FILE; + #endif + #ifdef ELIBSCN + case ELIBSCN: return DRFLAC_INVALID_FILE; + #endif + #ifdef ELIBMAX + case ELIBMAX: return DRFLAC_ERROR; + #endif + #ifdef ELIBEXEC + case ELIBEXEC: return DRFLAC_ERROR; + #endif + #ifdef EILSEQ + case EILSEQ: return DRFLAC_INVALID_DATA; + #endif + #ifdef ERESTART + case ERESTART: return DRFLAC_ERROR; + #endif + #ifdef ESTRPIPE + case ESTRPIPE: return DRFLAC_ERROR; + #endif + #ifdef EUSERS + case EUSERS: return DRFLAC_ERROR; + #endif + #ifdef ENOTSOCK + case ENOTSOCK: return DRFLAC_NOT_SOCKET; + #endif + #ifdef EDESTADDRREQ + case EDESTADDRREQ: return DRFLAC_NO_ADDRESS; + #endif + #ifdef EMSGSIZE + case EMSGSIZE: return DRFLAC_TOO_BIG; + #endif + #ifdef EPROTOTYPE + case EPROTOTYPE: return DRFLAC_BAD_PROTOCOL; + #endif + #ifdef ENOPROTOOPT + case ENOPROTOOPT: return DRFLAC_PROTOCOL_UNAVAILABLE; + #endif + #ifdef EPROTONOSUPPORT + case EPROTONOSUPPORT: return DRFLAC_PROTOCOL_NOT_SUPPORTED; + #endif + #ifdef ESOCKTNOSUPPORT + case ESOCKTNOSUPPORT: return DRFLAC_SOCKET_NOT_SUPPORTED; + #endif + #ifdef EOPNOTSUPP + case EOPNOTSUPP: return DRFLAC_INVALID_OPERATION; + #endif + #ifdef EPFNOSUPPORT + case EPFNOSUPPORT: return DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED; + #endif + #ifdef EAFNOSUPPORT + case EAFNOSUPPORT: return DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED; + #endif + #ifdef EADDRINUSE + case EADDRINUSE: return DRFLAC_ALREADY_IN_USE; + #endif + #ifdef EADDRNOTAVAIL + case EADDRNOTAVAIL: return DRFLAC_ERROR; + #endif + #ifdef ENETDOWN + case ENETDOWN: return DRFLAC_NO_NETWORK; + #endif + #ifdef ENETUNREACH + case ENETUNREACH: return DRFLAC_NO_NETWORK; + #endif + #ifdef ENETRESET + case ENETRESET: return DRFLAC_NO_NETWORK; + #endif + #ifdef ECONNABORTED + case ECONNABORTED: return DRFLAC_NO_NETWORK; + #endif + #ifdef ECONNRESET + case ECONNRESET: return DRFLAC_CONNECTION_RESET; + #endif + #ifdef ENOBUFS + case ENOBUFS: return DRFLAC_NO_SPACE; + #endif + #ifdef EISCONN + case EISCONN: return DRFLAC_ALREADY_CONNECTED; + #endif + #ifdef ENOTCONN + case ENOTCONN: return DRFLAC_NOT_CONNECTED; + #endif + #ifdef ESHUTDOWN + case ESHUTDOWN: return DRFLAC_ERROR; + #endif + #ifdef ETOOMANYREFS + case ETOOMANYREFS: return DRFLAC_ERROR; + #endif + #ifdef ETIMEDOUT + case ETIMEDOUT: return DRFLAC_TIMEOUT; + #endif + #ifdef ECONNREFUSED + case ECONNREFUSED: return DRFLAC_CONNECTION_REFUSED; + #endif + #ifdef EHOSTDOWN + case EHOSTDOWN: return DRFLAC_NO_HOST; + #endif + #ifdef EHOSTUNREACH + case EHOSTUNREACH: return DRFLAC_NO_HOST; + #endif + #ifdef EALREADY + case EALREADY: return DRFLAC_IN_PROGRESS; + #endif + #ifdef EINPROGRESS + case EINPROGRESS: return DRFLAC_IN_PROGRESS; + #endif + #ifdef ESTALE + case ESTALE: return DRFLAC_INVALID_FILE; + #endif + #ifdef EUCLEAN + case EUCLEAN: return DRFLAC_ERROR; + #endif + #ifdef ENOTNAM + case ENOTNAM: return DRFLAC_ERROR; + #endif + #ifdef ENAVAIL + case ENAVAIL: return DRFLAC_ERROR; + #endif + #ifdef EISNAM + case EISNAM: return DRFLAC_ERROR; + #endif + #ifdef EREMOTEIO + case EREMOTEIO: return DRFLAC_IO_ERROR; + #endif + #ifdef EDQUOT + case EDQUOT: return DRFLAC_NO_SPACE; + #endif + #ifdef ENOMEDIUM + case ENOMEDIUM: return DRFLAC_DOES_NOT_EXIST; + #endif + #ifdef EMEDIUMTYPE + case EMEDIUMTYPE: return DRFLAC_ERROR; + #endif + #ifdef ECANCELED + case ECANCELED: return DRFLAC_CANCELLED; + #endif + #ifdef ENOKEY + case ENOKEY: return DRFLAC_ERROR; + #endif + #ifdef EKEYEXPIRED + case EKEYEXPIRED: return DRFLAC_ERROR; + #endif + #ifdef EKEYREVOKED + case EKEYREVOKED: return DRFLAC_ERROR; + #endif + #ifdef EKEYREJECTED + case EKEYREJECTED: return DRFLAC_ERROR; + #endif + #ifdef EOWNERDEAD + case EOWNERDEAD: return DRFLAC_ERROR; + #endif + #ifdef ENOTRECOVERABLE + case ENOTRECOVERABLE: return DRFLAC_ERROR; + #endif + #ifdef ERFKILL + case ERFKILL: return DRFLAC_ERROR; + #endif + #ifdef EHWPOISON + case EHWPOISON: return DRFLAC_ERROR; + #endif + default: return DRFLAC_ERROR; + } +} + +static drflac_result drflac_fopen(FILE** ppFile, const char* pFilePath, const char* pOpenMode) +{ +#if defined(_MSC_VER) && _MSC_VER >= 1400 + errno_t err; +#endif + + if (ppFile != NULL) { + *ppFile = NULL; /* Safety. */ + } + + if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { + return DRFLAC_INVALID_ARGS; + } + +#if defined(_MSC_VER) && _MSC_VER >= 1400 + err = fopen_s(ppFile, pFilePath, pOpenMode); + if (err != 0) { + return drflac_result_from_errno(err); + } +#else +#if defined(_WIN32) || defined(__APPLE__) + *ppFile = fopen(pFilePath, pOpenMode); +#else + #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(_LARGEFILE64_SOURCE) + *ppFile = fopen64(pFilePath, pOpenMode); + #else + *ppFile = fopen(pFilePath, pOpenMode); + #endif +#endif + if (*ppFile == NULL) { + drflac_result result = drflac_result_from_errno(errno); + if (result == DRFLAC_SUCCESS) { + result = DRFLAC_ERROR; /* Just a safety check to make sure we never ever return success when pFile == NULL. */ + } + + return result; + } +#endif - if (pRunningDataEnd - pRunningData < 4) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + return DRFLAC_SUCCESS; +} - commentLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - if (pRunningDataEnd - pRunningData < (drflac_int64)commentLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } - pRunningData += commentLength; - } +/* +_wfopen() isn't always available in all compilation environments. - onMeta(pUserDataMD, &metadata); + * Windows only. + * MSVC seems to support it universally as far back as VC6 from what I can tell (haven't checked further back). + * MinGW-64 (both 32- and 64-bit) seems to support it. + * MinGW wraps it in !defined(__STRICT_ANSI__). + * OpenWatcom wraps it in !defined(_NO_EXT_KEYS). - DRFLAC_FREE(pRawData); - } - } break; +This can be reviewed as compatibility issues arise. The preference is to use _wfopen_s() and _wfopen() as opposed to the wcsrtombs() +fallback, so if you notice your compiler not detecting this properly I'm happy to look at adding support. +*/ +#if defined(_WIN32) + #if defined(_MSC_VER) || defined(__MINGW64__) || (!defined(__STRICT_ANSI__) && !defined(_NO_EXT_KEYS)) + #define DRFLAC_HAS_WFOPEN + #endif +#endif - case DRFLAC_METADATA_BLOCK_TYPE_CUESHEET: - { - if (blockSize < 396) { - return DRFLAC_FALSE; - } +static drflac_result drflac_wfopen(FILE** ppFile, const wchar_t* pFilePath, const wchar_t* pOpenMode, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + if (ppFile != NULL) { + *ppFile = NULL; /* Safety. */ + } - if (onMeta) { - void* pRawData; - const char* pRunningData; - const char* pRunningDataEnd; - drflac_uint8 iTrack; - drflac_uint8 iIndex; + if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { + return DRFLAC_INVALID_ARGS; + } - pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } +#if defined(DRFLAC_HAS_WFOPEN) + { + /* Use _wfopen() on Windows. */ + #if defined(_MSC_VER) && _MSC_VER >= 1400 + errno_t err = _wfopen_s(ppFile, pFilePath, pOpenMode); + if (err != 0) { + return drflac_result_from_errno(err); + } + #else + *ppFile = _wfopen(pFilePath, pOpenMode); + if (*ppFile == NULL) { + return drflac_result_from_errno(errno); + } + #endif + (void)pAllocationCallbacks; + } +#else + /* + Use fopen() on anything other than Windows. Requires a conversion. This is annoying because fopen() is locale specific. The only real way I can + think of to do this is with wcsrtombs(). Note that wcstombs() is apparently not thread-safe because it uses a static global mbstate_t object for + maintaining state. I've checked this with -std=c89 and it works, but if somebody get's a compiler error I'll look into improving compatibility. + */ + { + mbstate_t mbs; + size_t lenMB; + const wchar_t* pFilePathTemp = pFilePath; + char* pFilePathMB = NULL; + char pOpenModeMB[32] = {0}; - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + /* Get the length first. */ + DRFLAC_ZERO_OBJECT(&mbs); + lenMB = wcsrtombs(NULL, &pFilePathTemp, 0, &mbs); + if (lenMB == (size_t)-1) { + return drflac_result_from_errno(errno); + } - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; + pFilePathMB = (char*)drflac__malloc_from_callbacks(lenMB + 1, pAllocationCallbacks); + if (pFilePathMB == NULL) { + return DRFLAC_OUT_OF_MEMORY; + } - pRunningData = (const char*)pRawData; - pRunningDataEnd = (const char*)pRawData + blockSize; + pFilePathTemp = pFilePath; + DRFLAC_ZERO_OBJECT(&mbs); + wcsrtombs(pFilePathMB, &pFilePathTemp, lenMB + 1, &mbs); - drflac_copy_memory(metadata.data.cuesheet.catalog, pRunningData, 128); pRunningData += 128; - metadata.data.cuesheet.leadInSampleCount = drflac__be2host_64(*(const drflac_uint64*)pRunningData); pRunningData += 8; - metadata.data.cuesheet.isCD = (pRunningData[0] & 0x80) != 0; pRunningData += 259; - metadata.data.cuesheet.trackCount = pRunningData[0]; pRunningData += 1; - metadata.data.cuesheet.pTrackData = pRunningData; + /* The open mode should always consist of ASCII characters so we should be able to do a trivial conversion. */ + { + size_t i = 0; + for (;;) { + if (pOpenMode[i] == 0) { + pOpenModeMB[i] = '\0'; + break; + } - /* Check that the cuesheet tracks are valid before passing it to the callback */ - for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { - drflac_uint8 indexCount; - drflac_uint32 indexPointSize; + pOpenModeMB[i] = (char)pOpenMode[i]; + i += 1; + } + } - if (pRunningDataEnd - pRunningData < 36) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + *ppFile = fopen(pFilePathMB, pOpenModeMB); - /* Skip to the index point count */ - pRunningData += 35; - indexCount = pRunningData[0]; pRunningData += 1; - indexPointSize = indexCount * sizeof(drflac_cuesheet_track_index); - if (pRunningDataEnd - pRunningData < (drflac_int64)indexPointSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + drflac__free_from_callbacks(pFilePathMB, pAllocationCallbacks); + } - /* Endian swap. */ - for (iIndex = 0; iIndex < indexCount; ++iIndex) { - drflac_cuesheet_track_index* pTrack = (drflac_cuesheet_track_index*)pRunningData; - pRunningData += sizeof(drflac_cuesheet_track_index); - pTrack->offset = drflac__be2host_64(pTrack->offset); - } - } + if (*ppFile == NULL) { + return DRFLAC_ERROR; + } +#endif - onMeta(pUserDataMD, &metadata); + return DRFLAC_SUCCESS; +} - DRFLAC_FREE(pRawData); - } - } break; +static size_t drflac__on_read_stdio(void* pUserData, void* bufferOut, size_t bytesToRead) +{ + return fread(bufferOut, 1, bytesToRead, (FILE*)pUserData); +} - case DRFLAC_METADATA_BLOCK_TYPE_PICTURE: - { - if (blockSize < 32) { - return DRFLAC_FALSE; - } +static drflac_bool32 drflac__on_seek_stdio(void* pUserData, int offset, drflac_seek_origin origin) +{ + DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ - if (onMeta) { - void* pRawData; - const char* pRunningData; - const char* pRunningDataEnd; + return fseek((FILE*)pUserData, offset, (origin == drflac_seek_origin_current) ? SEEK_CUR : SEEK_SET) == 0; +} - pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } +DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac* pFlac; + FILE* pFile; - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; + if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { + return NULL; + } - pRunningData = (const char*)pRawData; - pRunningDataEnd = (const char*)pRawData + blockSize; + pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); + if (pFlac == NULL) { + fclose(pFile); + return NULL; + } - metadata.data.picture.type = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.mimeLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; + return pFlac; +} - /* Need space for the rest of the block */ - if ((pRunningDataEnd - pRunningData) - 24 < (drflac_int64)metadata.data.picture.mimeLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } - metadata.data.picture.mime = pRunningData; pRunningData += metadata.data.picture.mimeLength; - metadata.data.picture.descriptionLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; +DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac* pFlac; + FILE* pFile; - /* Need space for the rest of the block */ - if ((pRunningDataEnd - pRunningData) - 20 < (drflac_int64)metadata.data.picture.descriptionLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } - metadata.data.picture.description = pRunningData; pRunningData += metadata.data.picture.descriptionLength; - metadata.data.picture.width = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.height = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.colorDepth = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.indexColorCount = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.pictureDataSize = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; - metadata.data.picture.pPictureData = (const drflac_uint8*)pRunningData; + if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { + return NULL; + } - /* Need space for the picture after the block */ - if (pRunningDataEnd - pRunningData < (drflac_int64)metadata.data.picture.pictureDataSize) { /* <-- Note the order of operations to avoid overflow to a valid value */ - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); + if (pFlac == NULL) { + fclose(pFile); + return NULL; + } - onMeta(pUserDataMD, &metadata); + return pFlac; +} - DRFLAC_FREE(pRawData); - } - } break; +DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac* pFlac; + FILE* pFile; - case DRFLAC_METADATA_BLOCK_TYPE_PADDING: - { - if (onMeta) { - metadata.data.padding.unused = 0; + if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { + return NULL; + } - /* Padding doesn't have anything meaningful in it, so just skip over it, but make sure the caller is aware of it by firing the callback. */ - if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { - isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ - } else { - onMeta(pUserDataMD, &metadata); - } - } - } break; + pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); + if (pFlac == NULL) { + fclose(pFile); + return pFlac; + } - case DRFLAC_METADATA_BLOCK_TYPE_INVALID: - { - /* Invalid chunk. Just skip over this one. */ - if (onMeta) { - if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { - isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ - } - } - } break; + return pFlac; +} - default: - { - /* - It's an unknown chunk, but not necessarily invalid. There's a chance more metadata blocks might be defined later on, so we - can at the very least report the chunk to the application and let it look at the raw data. - */ - if (onMeta) { - void* pRawData = DRFLAC_MALLOC(blockSize); - if (pRawData == NULL) { - return DRFLAC_FALSE; - } +DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac* pFlac; + FILE* pFile; - if (onRead(pUserData, pRawData, blockSize) != blockSize) { - DRFLAC_FREE(pRawData); - return DRFLAC_FALSE; - } + if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { + return NULL; + } - metadata.pRawData = pRawData; - metadata.rawDataSize = blockSize; - onMeta(pUserDataMD, &metadata); + pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); + if (pFlac == NULL) { + fclose(pFile); + return pFlac; + } - DRFLAC_FREE(pRawData); - } - } break; - } + return pFlac; +} +#endif /* DR_FLAC_NO_STDIO */ - /* If we're not handling metadata, just skip over the block. If we are, it will have been handled earlier in the switch statement above. */ - if (onMeta == NULL && blockSize > 0) { - if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { - isLastBlock = DRFLAC_TRUE; - } - } +static size_t drflac__on_read_memory(void* pUserData, void* bufferOut, size_t bytesToRead) +{ + drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; + size_t bytesRemaining; - runningFilePos += blockSize; - if (isLastBlock) { - break; - } + DRFLAC_ASSERT(memoryStream != NULL); + DRFLAC_ASSERT(memoryStream->dataSize >= memoryStream->currentReadPos); + + bytesRemaining = memoryStream->dataSize - memoryStream->currentReadPos; + if (bytesToRead > bytesRemaining) { + bytesToRead = bytesRemaining; } - *pSeektablePos = seektablePos; - *pSeektableSize = seektableSize; - *pFirstFramePos = runningFilePos; + if (bytesToRead > 0) { + DRFLAC_COPY_MEMORY(bufferOut, memoryStream->data + memoryStream->currentReadPos, bytesToRead); + memoryStream->currentReadPos += bytesToRead; + } - return DRFLAC_TRUE; + return bytesToRead; } -drflac_bool32 drflac__init_private__native(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) +static drflac_bool32 drflac__on_seek_memory(void* pUserData, int offset, drflac_seek_origin origin) { - /* Pre Condition: The bit stream should be sitting just past the 4-byte id header. */ - - drflac_uint8 isLastBlock; - drflac_uint8 blockType; - drflac_uint32 blockSize; - - (void)onSeek; + drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; - pInit->container = drflac_container_native; + DRFLAC_ASSERT(memoryStream != NULL); + DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ - /* The first metadata block should be the STREAMINFO block. */ - if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { + if (offset > (drflac_int64)memoryStream->dataSize) { return DRFLAC_FALSE; } - if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { - if (!relaxed) { - /* We're opening in strict mode and the first block is not the STREAMINFO block. Error. */ - return DRFLAC_FALSE; + if (origin == drflac_seek_origin_current) { + if (memoryStream->currentReadPos + offset <= memoryStream->dataSize) { + memoryStream->currentReadPos += offset; } else { - /* - Relaxed mode. To open from here we need to just find the first frame and set the sample rate, etc. to whatever is defined - for that frame. - */ - pInit->hasStreamInfoBlock = DRFLAC_FALSE; - pInit->hasMetadataBlocks = DRFLAC_FALSE; - - if (!drflac__read_next_flac_frame_header(&pInit->bs, 0, &pInit->firstFrameHeader)) { - return DRFLAC_FALSE; /* Couldn't find a frame. */ - } - - if (pInit->firstFrameHeader.bitsPerSample == 0) { - return DRFLAC_FALSE; /* Failed to initialize because the first frame depends on the STREAMINFO block, which does not exist. */ - } - - pInit->sampleRate = pInit->firstFrameHeader.sampleRate; - pInit->channels = drflac__get_channel_count_from_channel_assignment(pInit->firstFrameHeader.channelAssignment); - pInit->bitsPerSample = pInit->firstFrameHeader.bitsPerSample; - pInit->maxBlockSize = 65535; /* <-- See notes here: https://xiph.org/flac/format.html#metadata_block_streaminfo */ - return DRFLAC_TRUE; + return DRFLAC_FALSE; /* Trying to seek too far forward. */ } } else { - drflac_streaminfo streaminfo; - if (!drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { - return DRFLAC_FALSE; + if ((drflac_uint32)offset <= memoryStream->dataSize) { + memoryStream->currentReadPos = offset; + } else { + return DRFLAC_FALSE; /* Trying to seek too far forward. */ } + } - pInit->hasStreamInfoBlock = DRFLAC_TRUE; - pInit->sampleRate = streaminfo.sampleRate; - pInit->channels = streaminfo.channels; - pInit->bitsPerSample = streaminfo.bitsPerSample; - pInit->totalSampleCount = streaminfo.totalSampleCount; - pInit->maxBlockSize = streaminfo.maxBlockSize; /* Don't care about the min block size - only the max (used for determining the size of the memory allocation). */ - pInit->hasMetadataBlocks = !isLastBlock; + return DRFLAC_TRUE; +} - if (onMeta) { - drflac_metadata metadata; - metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; - metadata.pRawData = NULL; - metadata.rawDataSize = 0; - metadata.data.streaminfo = streaminfo; - onMeta(pUserDataMD, &metadata); - } +DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks) +{ + drflac__memory_stream memoryStream; + drflac* pFlac; - return DRFLAC_TRUE; + memoryStream.data = (const drflac_uint8*)pData; + memoryStream.dataSize = dataSize; + memoryStream.currentReadPos = 0; + pFlac = drflac_open(drflac__on_read_memory, drflac__on_seek_memory, &memoryStream, pAllocationCallbacks); + if (pFlac == NULL) { + return NULL; } -} + pFlac->memoryStream = memoryStream; + + /* This is an awful hack... */ #ifndef DR_FLAC_NO_OGG -#define DRFLAC_OGG_MAX_PAGE_SIZE 65307 -#define DRFLAC_OGG_CAPTURE_PATTERN_CRC32 1605413199 /* CRC-32 of "OggS". */ + if (pFlac->container == drflac_container_ogg) + { + drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; + oggbs->pUserData = &pFlac->memoryStream; + } + else +#endif + { + pFlac->bs.pUserData = &pFlac->memoryStream; + } -typedef enum + return pFlac; +} + +DRFLAC_API drflac* drflac_open_memory_with_metadata(const void* pData, size_t dataSize, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) { - drflac_ogg_recover_on_crc_mismatch, - drflac_ogg_fail_on_crc_mismatch -} drflac_ogg_crc_mismatch_recovery; + drflac__memory_stream memoryStream; + drflac* pFlac; -#ifndef DR_FLAC_NO_CRC -static drflac_uint32 drflac__crc32_table[] = { - 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, - 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, - 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, - 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, - 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, - 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, - 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, - 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, - 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, - 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, - 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, - 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, - 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, - 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, - 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, - 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, - 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, - 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, - 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, - 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, - 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, - 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, - 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, - 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, - 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, - 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, - 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, - 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, - 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, - 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, - 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, - 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, - 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, - 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, - 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, - 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, - 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, - 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, - 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, - 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, - 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, - 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, - 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, - 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, - 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, - 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, - 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, - 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, - 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, - 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, - 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, - 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, - 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, - 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, - 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, - 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, - 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, - 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, - 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, - 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, - 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, - 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, - 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, - 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L -}; -#endif + memoryStream.data = (const drflac_uint8*)pData; + memoryStream.dataSize = dataSize; + memoryStream.currentReadPos = 0; + pFlac = drflac_open_with_metadata_private(drflac__on_read_memory, drflac__on_seek_memory, onMeta, drflac_container_unknown, &memoryStream, pUserData, pAllocationCallbacks); + if (pFlac == NULL) { + return NULL; + } -static DRFLAC_INLINE drflac_uint32 drflac_crc32_byte(drflac_uint32 crc32, drflac_uint8 data) -{ -#ifndef DR_FLAC_NO_CRC - return (crc32 << 8) ^ drflac__crc32_table[(drflac_uint8)((crc32 >> 24) & 0xFF) ^ data]; -#else - (void)data; - return crc32; + pFlac->memoryStream = memoryStream; + + /* This is an awful hack... */ +#ifndef DR_FLAC_NO_OGG + if (pFlac->container == drflac_container_ogg) + { + drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; + oggbs->pUserData = &pFlac->memoryStream; + } + else #endif -} + { + pFlac->bs.pUserData = &pFlac->memoryStream; + } -#if 0 -static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint32(drflac_uint32 crc32, drflac_uint32 data) -{ - crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 24) & 0xFF)); - crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 16) & 0xFF)); - crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 8) & 0xFF)); - crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 0) & 0xFF)); - return crc32; + return pFlac; } -static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint64(drflac_uint32 crc32, drflac_uint64 data) + + +DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) { - crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 32) & 0xFFFFFFFF)); - crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 0) & 0xFFFFFFFF)); - return crc32; + return drflac_open_with_metadata_private(onRead, onSeek, NULL, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); } -#endif - -static DRFLAC_INLINE drflac_uint32 drflac_crc32_buffer(drflac_uint32 crc32, drflac_uint8* pData, drflac_uint32 dataSize) +DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) { - /* This can be optimized. */ - drflac_uint32 i; - for (i = 0; i < dataSize; ++i) { - crc32 = drflac_crc32_byte(crc32, pData[i]); - } - return crc32; + return drflac_open_with_metadata_private(onRead, onSeek, NULL, container, pUserData, pUserData, pAllocationCallbacks); } - -static DRFLAC_INLINE drflac_bool32 drflac_ogg__is_capture_pattern(drflac_uint8 pattern[4]) +DRFLAC_API drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) { - return pattern[0] == 'O' && pattern[1] == 'g' && pattern[2] == 'g' && pattern[3] == 'S'; + return drflac_open_with_metadata_private(onRead, onSeek, onMeta, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); } - -static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_header_size(drflac_ogg_page_header* pHeader) +DRFLAC_API drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) { - return 27 + pHeader->segmentCount; + return drflac_open_with_metadata_private(onRead, onSeek, onMeta, container, pUserData, pUserData, pAllocationCallbacks); } -static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_body_size(drflac_ogg_page_header* pHeader) +DRFLAC_API void drflac_close(drflac* pFlac) { - drflac_uint32 pageBodySize = 0; - int i; - - for (i = 0; i < pHeader->segmentCount; ++i) { - pageBodySize += pHeader->segmentTable[i]; + if (pFlac == NULL) { + return; } - return pageBodySize; -} - -drflac_result drflac_ogg__read_page_header_after_capture_pattern(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) -{ - drflac_uint8 data[23]; - drflac_uint32 i; +#ifndef DR_FLAC_NO_STDIO + /* + If we opened the file with drflac_open_file() we will want to close the file handle. We can know whether or not drflac_open_file() + was used by looking at the callbacks. + */ + if (pFlac->bs.onRead == drflac__on_read_stdio) { + fclose((FILE*)pFlac->bs.pUserData); + } - drflac_assert(*pCRC32 == DRFLAC_OGG_CAPTURE_PATTERN_CRC32); +#ifndef DR_FLAC_NO_OGG + /* Need to clean up Ogg streams a bit differently due to the way the bit streaming is chained. */ + if (pFlac->container == drflac_container_ogg) { + drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; + DRFLAC_ASSERT(pFlac->bs.onRead == drflac__on_read_ogg); - if (onRead(pUserData, data, 23) != 23) { - return DRFLAC_END_OF_STREAM; + if (oggbs->onRead == drflac__on_read_stdio) { + fclose((FILE*)oggbs->pUserData); + } } - *pBytesRead += 23; - - pHeader->structureVersion = data[0]; - pHeader->headerType = data[1]; - drflac_copy_memory(&pHeader->granulePosition, &data[ 2], 8); - drflac_copy_memory(&pHeader->serialNumber, &data[10], 4); - drflac_copy_memory(&pHeader->sequenceNumber, &data[14], 4); - drflac_copy_memory(&pHeader->checksum, &data[18], 4); - pHeader->segmentCount = data[22]; +#endif +#endif - /* Calculate the CRC. Note that for the calculation the checksum part of the page needs to be set to 0. */ - data[18] = 0; - data[19] = 0; - data[20] = 0; - data[21] = 0; + drflac__free_from_callbacks(pFlac, &pFlac->allocationCallbacks); +} - for (i = 0; i < 23; ++i) { - *pCRC32 = drflac_crc32_byte(*pCRC32, data[i]); - } +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + for (i = 0; i < frameCount; ++i) { + drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 right = left - side; - if (onRead(pUserData, pHeader->segmentTable, pHeader->segmentCount) != pHeader->segmentCount) { - return DRFLAC_END_OF_STREAM; + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; } - *pBytesRead += pHeader->segmentCount; +} +#endif - for (i = 0; i < pHeader->segmentCount; ++i) { - *pCRC32 = drflac_crc32_byte(*pCRC32, pHeader->segmentTable[i]); +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 right0 = left0 - side0; + drflac_uint32 right1 = left1 - side1; + drflac_uint32 right2 = left2 - side2; + drflac_uint32 right3 = left3 - side3; + + pOutputSamples[i*8+0] = (drflac_int32)left0; + pOutputSamples[i*8+1] = (drflac_int32)right0; + pOutputSamples[i*8+2] = (drflac_int32)left1; + pOutputSamples[i*8+3] = (drflac_int32)right1; + pOutputSamples[i*8+4] = (drflac_int32)left2; + pOutputSamples[i*8+5] = (drflac_int32)right2; + pOutputSamples[i*8+6] = (drflac_int32)left3; + pOutputSamples[i*8+7] = (drflac_int32)right3; } - return DRFLAC_SUCCESS; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; + + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; + } } -drflac_result drflac_ogg__read_page_header(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_uint8 id[4]; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - *pBytesRead = 0; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - if (onRead(pUserData, id, 4) != 4) { - return DRFLAC_END_OF_STREAM; - } - *pBytesRead += 4; + for (i = 0; i < frameCount4; ++i) { + __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); + __m128i right = _mm_sub_epi32(left, side); - /* We need to read byte-by-byte until we find the OggS capture pattern. */ - for (;;) { - if (drflac_ogg__is_capture_pattern(id)) { - drflac_result result; + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); + } - *pCRC32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - result = drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, pHeader, pBytesRead, pCRC32); - if (result == DRFLAC_SUCCESS) { - return DRFLAC_SUCCESS; - } else { - if (result == DRFLAC_CRC_MISMATCH) { - continue; - } else { - return result; - } - } - } else { - /* The first 4 bytes did not equal the capture pattern. Read the next byte and try again. */ - id[0] = id[1]; - id[1] = id[2]; - id[2] = id[3]; - if (onRead(pUserData, &id[3], 1) != 1) { - return DRFLAC_END_OF_STREAM; - } - *pBytesRead += 1; - } + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; } } +#endif - -/* -The main part of the Ogg encapsulation is the conversion from the physical Ogg bitstream to the native FLAC bitstream. It works -in three general stages: Ogg Physical Bitstream -> Ogg/FLAC Logical Bitstream -> FLAC Native Bitstream. dr_flac is designed -in such a way that the core sections assume everything is delivered in native format. Therefore, for each encapsulation type -dr_flac is supporting there needs to be a layer sitting on top of the onRead and onSeek callbacks that ensures the bits read from -the physical Ogg bitstream are converted and delivered in native FLAC format. -*/ -typedef struct +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_read_proc onRead; /* The original onRead callback from drflac_open() and family. */ - drflac_seek_proc onSeek; /* The original onSeek callback from drflac_open() and family. */ - void* pUserData; /* The user data passed on onRead and onSeek. This is the user data that was passed on drflac_open() and family. */ - drflac_uint64 currentBytePos; /* The position of the byte we are sitting on in the physical byte stream. Used for efficient seeking. */ - drflac_uint64 firstBytePos; /* The position of the first byte in the physical bitstream. Points to the start of the "OggS" identifier of the FLAC bos page. */ - drflac_uint32 serialNumber; /* The serial number of the FLAC audio pages. This is determined by the initial header page that was read during initialization. */ - drflac_ogg_page_header bosPageHeader; /* Used for seeking. */ - drflac_ogg_page_header currentPageHeader; - drflac_uint32 bytesRemainingInPage; - drflac_uint32 pageDataSize; - drflac_uint8 pageData[DRFLAC_OGG_MAX_PAGE_SIZE]; -} drflac_oggbs; /* oggbs = Ogg Bitstream */ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + int32x4_t shift0_4; + int32x4_t shift1_4; -static size_t drflac_oggbs__read_physical(drflac_oggbs* oggbs, void* bufferOut, size_t bytesToRead) -{ - size_t bytesActuallyRead = oggbs->onRead(oggbs->pUserData, bufferOut, bytesToRead); - oggbs->currentBytePos += bytesActuallyRead; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - return bytesActuallyRead; -} + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); -static drflac_bool32 drflac_oggbs__seek_physical(drflac_oggbs* oggbs, drflac_uint64 offset, drflac_seek_origin origin) -{ - if (origin == drflac_seek_origin_start) { - if (offset <= 0x7FFFFFFF) { - if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_start)) { - return DRFLAC_FALSE; - } - oggbs->currentBytePos = offset; + for (i = 0; i < frameCount4; ++i) { + uint32x4_t left; + uint32x4_t side; + uint32x4_t right; - return DRFLAC_TRUE; - } else { - if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { - return DRFLAC_FALSE; - } - oggbs->currentBytePos = offset; + left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + right = vsubq_u32(left, side); - return drflac_oggbs__seek_physical(oggbs, offset - 0x7FFFFFFF, drflac_seek_origin_current); - } - } else { - while (offset > 0x7FFFFFFF) { - if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } - oggbs->currentBytePos += 0x7FFFFFFF; - offset -= 0x7FFFFFFF; - } + drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); + } - if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_current)) { /* <-- Safe cast thanks to the loop above. */ - return DRFLAC_FALSE; - } - oggbs->currentBytePos += offset; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - return DRFLAC_TRUE; + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; } } +#endif -static drflac_bool32 drflac_oggbs__goto_next_page(drflac_oggbs* oggbs, drflac_ogg_crc_mismatch_recovery recoveryMethod) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_ogg_page_header header; - for (;;) { - drflac_uint32 crc32 = 0; - drflac_uint32 bytesRead; - drflac_uint32 pageBodySize; -#ifndef DR_FLAC_NO_CRC - drflac_uint32 actualCRC32; +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif - - if (drflac_ogg__read_page_header(oggbs->onRead, oggbs->pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { - return DRFLAC_FALSE; - } - oggbs->currentBytePos += bytesRead; - - pageBodySize = drflac_ogg__get_page_body_size(&header); - if (pageBodySize > DRFLAC_OGG_MAX_PAGE_SIZE) { - continue; /* Invalid page size. Assume it's corrupted and just move to the next page. */ - } - - if (header.serialNumber != oggbs->serialNumber) { - /* It's not a FLAC page. Skip it. */ - if (pageBodySize > 0 && !drflac_oggbs__seek_physical(oggbs, pageBodySize, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } - continue; - } - - - /* We need to read the entire page and then do a CRC check on it. If there's a CRC mismatch we need to skip this page. */ - if (drflac_oggbs__read_physical(oggbs, oggbs->pageData, pageBodySize) != pageBodySize) { - return DRFLAC_FALSE; - } - oggbs->pageDataSize = pageBodySize; - -#ifndef DR_FLAC_NO_CRC - actualCRC32 = drflac_crc32_buffer(crc32, oggbs->pageData, oggbs->pageDataSize); - if (actualCRC32 != header.checksum) { - if (recoveryMethod == drflac_ogg_recover_on_crc_mismatch) { - continue; /* CRC mismatch. Skip this page. */ - } else { - /* - Even though we are failing on a CRC mismatch, we still want our stream to be in a good state. Therefore we - go to the next valid page to ensure we're in a good state, but return false to let the caller know that the - seek did not fully complete. - */ - drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch); - return DRFLAC_FALSE; - } - } + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s32__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); #else - (void)recoveryMethod; /* <-- Silence a warning. */ + drflac_read_pcm_frames_s32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); #endif - - oggbs->currentPageHeader = header; - oggbs->bytesRemainingInPage = pageBodySize; - return DRFLAC_TRUE; } } -/* Function below is unused at the moment, but I might be re-adding it later. */ + #if 0 -static drflac_uint8 drflac_oggbs__get_current_segment_index(drflac_oggbs* oggbs, drflac_uint8* pBytesRemainingInSeg) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_uint32 bytesConsumedInPage = drflac_ogg__get_page_body_size(&oggbs->currentPageHeader) - oggbs->bytesRemainingInPage; - drflac_uint8 iSeg = 0; - drflac_uint32 iByte = 0; - while (iByte < bytesConsumedInPage) { - drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; - if (iByte + segmentSize > bytesConsumedInPage) { - break; - } else { - iSeg += 1; - iByte += segmentSize; - } - } + drflac_uint64 i; + for (i = 0; i < frameCount; ++i) { + drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 left = right + side; - *pBytesRemainingInSeg = oggbs->currentPageHeader.segmentTable[iSeg] - (drflac_uint8)(bytesConsumedInPage - iByte); - return iSeg; + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; + } } +#endif -static drflac_bool32 drflac_oggbs__seek_to_next_packet(drflac_oggbs* oggbs) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - /* The current packet ends when we get to the segment with a lacing value of < 255 which is not at the end of a page. */ - for (;;) { - drflac_bool32 atEndOfPage = DRFLAC_FALSE; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - drflac_uint8 bytesRemainingInSeg; - drflac_uint8 iFirstSeg = drflac_oggbs__get_current_segment_index(oggbs, &bytesRemainingInSeg); + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 left0 = right0 + side0; + drflac_uint32 left1 = right1 + side1; + drflac_uint32 left2 = right2 + side2; + drflac_uint32 left3 = right3 + side3; + + pOutputSamples[i*8+0] = (drflac_int32)left0; + pOutputSamples[i*8+1] = (drflac_int32)right0; + pOutputSamples[i*8+2] = (drflac_int32)left1; + pOutputSamples[i*8+3] = (drflac_int32)right1; + pOutputSamples[i*8+4] = (drflac_int32)left2; + pOutputSamples[i*8+5] = (drflac_int32)right2; + pOutputSamples[i*8+6] = (drflac_int32)left3; + pOutputSamples[i*8+7] = (drflac_int32)right3; + } - drflac_uint32 bytesToEndOfPacketOrPage = bytesRemainingInSeg; - for (drflac_uint8 iSeg = iFirstSeg; iSeg < oggbs->currentPageHeader.segmentCount; ++iSeg) { - drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; - if (segmentSize < 255) { - if (iSeg == oggbs->currentPageHeader.segmentCount-1) { - atEndOfPage = DRFLAC_TRUE; - } + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; - break; - } + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; + } +} - bytesToEndOfPacketOrPage += segmentSize; - } +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - /* - At this point we will have found either the packet or the end of the page. If were at the end of the page we'll - want to load the next page and keep searching for the end of the packet. - */ - drflac_oggbs__seek_physical(oggbs, bytesToEndOfPacketOrPage, drflac_seek_origin_current); - oggbs->bytesRemainingInPage -= bytesToEndOfPacketOrPage; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - if (atEndOfPage) { - /* - We're potentially at the next packet, but we need to check the next page first to be sure because the packet may - straddle pages. - */ - if (!drflac_oggbs__goto_next_page(oggbs)) { - return DRFLAC_FALSE; - } + for (i = 0; i < frameCount4; ++i) { + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); + __m128i left = _mm_add_epi32(right, side); - /* If it's a fresh packet it most likely means we're at the next packet. */ - if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { - return DRFLAC_TRUE; - } - } else { - /* We're at the next packet. */ - return DRFLAC_TRUE; - } + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); } -} -static drflac_bool32 drflac_oggbs__seek_to_next_frame(drflac_oggbs* oggbs) -{ - /* The bitstream should be sitting on the first byte just after the header of the frame. */ + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; - /* What we're actually doing here is seeking to the start of the next packet. */ - return drflac_oggbs__seek_to_next_packet(oggbs); + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; + } } #endif -static size_t drflac__on_read_ogg(void* pUserData, void* bufferOut, size_t bytesToRead) +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; - drflac_uint8* pRunningBufferOut = (drflac_uint8*)bufferOut; - size_t bytesRead = 0; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + int32x4_t shift0_4; + int32x4_t shift1_4; - drflac_assert(oggbs != NULL); - drflac_assert(pRunningBufferOut != NULL); + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - /* Reading is done page-by-page. If we've run out of bytes in the page we need to move to the next one. */ - while (bytesRead < bytesToRead) { - size_t bytesRemainingToRead = bytesToRead - bytesRead; + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); - if (oggbs->bytesRemainingInPage >= bytesRemainingToRead) { - drflac_copy_memory(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), bytesRemainingToRead); - bytesRead += bytesRemainingToRead; - oggbs->bytesRemainingInPage -= (drflac_uint32)bytesRemainingToRead; - break; - } + for (i = 0; i < frameCount4; ++i) { + uint32x4_t side; + uint32x4_t right; + uint32x4_t left; - /* If we get here it means some of the requested data is contained in the next pages. */ - if (oggbs->bytesRemainingInPage > 0) { - drflac_copy_memory(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), oggbs->bytesRemainingInPage); - bytesRead += oggbs->bytesRemainingInPage; - pRunningBufferOut += oggbs->bytesRemainingInPage; - oggbs->bytesRemainingInPage = 0; - } + side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + left = vaddq_u32(right, side); - drflac_assert(bytesRemainingToRead > 0); - if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { - break; /* Failed to go to the next page. Might have simply hit the end of the stream. */ - } + drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); } - return bytesRead; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; + + pOutputSamples[i*2+0] = (drflac_int32)left; + pOutputSamples[i*2+1] = (drflac_int32)right; + } } +#endif -static drflac_bool32 drflac__on_seek_ogg(void* pUserData, int offset, drflac_seek_origin origin) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; - int bytesSeeked = 0; +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s32__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } +} - drflac_assert(oggbs != NULL); - drflac_assert(offset >= 0); /* <-- Never seek backwards. */ - /* Seeking is always forward which makes things a lot simpler. */ - if (origin == drflac_seek_origin_start) { - if (!drflac_oggbs__seek_physical(oggbs, (int)oggbs->firstBytePos, drflac_seek_origin_start)) { - return DRFLAC_FALSE; - } +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + for (drflac_uint64 i = 0; i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { - return DRFLAC_FALSE; - } + mid = (mid << 1) | (side & 0x01); - return drflac__on_seek_ogg(pUserData, offset, drflac_seek_origin_current); + pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); + pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); } +} +#endif - drflac_assert(origin == drflac_seek_origin_current); - - while (bytesSeeked < offset) { - int bytesRemainingToSeek = offset - bytesSeeked; - drflac_assert(bytesRemainingToSeek >= 0); - - if (oggbs->bytesRemainingInPage >= (size_t)bytesRemainingToSeek) { - bytesSeeked += bytesRemainingToSeek; - oggbs->bytesRemainingInPage -= bytesRemainingToSeek; - break; - } +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_int32 shift = unusedBitsPerSample; - /* If we get here it means some of the requested data is contained in the next pages. */ - if (oggbs->bytesRemainingInPage > 0) { - bytesSeeked += (int)oggbs->bytesRemainingInPage; - oggbs->bytesRemainingInPage = 0; + if (shift > 0) { + shift -= 1; + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = (mid0 + side0) << shift; + temp1L = (mid1 + side1) << shift; + temp2L = (mid2 + side2) << shift; + temp3L = (mid3 + side3) << shift; + + temp0R = (mid0 - side0) << shift; + temp1R = (mid1 - side1) << shift; + temp2R = (mid2 - side2) << shift; + temp3R = (mid3 - side3) << shift; + + pOutputSamples[i*8+0] = (drflac_int32)temp0L; + pOutputSamples[i*8+1] = (drflac_int32)temp0R; + pOutputSamples[i*8+2] = (drflac_int32)temp1L; + pOutputSamples[i*8+3] = (drflac_int32)temp1R; + pOutputSamples[i*8+4] = (drflac_int32)temp2L; + pOutputSamples[i*8+5] = (drflac_int32)temp2R; + pOutputSamples[i*8+6] = (drflac_int32)temp3L; + pOutputSamples[i*8+7] = (drflac_int32)temp3R; } - - drflac_assert(bytesRemainingToSeek > 0); - if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { - /* Failed to go to the next page. We either hit the end of the stream or had a CRC mismatch. */ - return DRFLAC_FALSE; + } else { + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); + temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); + temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); + temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); + + temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); + temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); + temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); + temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); + + pOutputSamples[i*8+0] = (drflac_int32)temp0L; + pOutputSamples[i*8+1] = (drflac_int32)temp0R; + pOutputSamples[i*8+2] = (drflac_int32)temp1L; + pOutputSamples[i*8+3] = (drflac_int32)temp1R; + pOutputSamples[i*8+4] = (drflac_int32)temp2L; + pOutputSamples[i*8+5] = (drflac_int32)temp2R; + pOutputSamples[i*8+6] = (drflac_int32)temp3L; + pOutputSamples[i*8+7] = (drflac_int32)temp3R; } } - return DRFLAC_TRUE; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); + pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); + } } -drflac_bool32 drflac_ogg__seek_to_sample(drflac* pFlac, drflac_uint64 sampleIndex) +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; - drflac_uint64 originalBytePos; - drflac_uint64 runningGranulePosition; - drflac_uint64 runningFrameBytePos; - drflac_uint64 runningSampleCount; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_int32 shift = unusedBitsPerSample; - drflac_assert(oggbs != NULL); + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - originalBytePos = oggbs->currentBytePos; /* For recovery. */ + if (shift == 0) { + for (i = 0; i < frameCount4; ++i) { + __m128i mid; + __m128i side; + __m128i left; + __m128i right; - /* First seek to the first frame. */ - if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFramePos)) { - return DRFLAC_FALSE; - } - oggbs->bytesRemainingInPage = 0; + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - runningGranulePosition = 0; - runningFrameBytePos = oggbs->currentBytePos; /* <-- Points to the OggS identifier. */ - for (;;) { - if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { - drflac_oggbs__seek_physical(oggbs, originalBytePos, drflac_seek_origin_start); - return DRFLAC_FALSE; /* Never did find that sample... */ - } + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); - runningFrameBytePos = oggbs->currentBytePos - drflac_ogg__get_page_header_size(&oggbs->currentPageHeader) - oggbs->pageDataSize; - if (oggbs->currentPageHeader.granulePosition*pFlac->channels >= sampleIndex) { - break; /* The sample is somewhere in the previous page. */ + left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); + right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); + + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); } - /* - At this point we know the sample is not in the previous page. It could possibly be in this page. For simplicity we - disregard any pages that do not begin a fresh packet. - */ - if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { /* <-- Is it a fresh page? */ - if (oggbs->currentPageHeader.segmentTable[0] >= 2) { - drflac_uint8 firstBytesInPage[2]; - firstBytesInPage[0] = oggbs->pageData[0]; - firstBytesInPage[1] = oggbs->pageData[1]; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - if ((firstBytesInPage[0] == 0xFF) && (firstBytesInPage[1] & 0xFC) == 0xF8) { /* <-- Does the page begin with a frame's sync code? */ - runningGranulePosition = oggbs->currentPageHeader.granulePosition*pFlac->channels; - } + mid = (mid << 1) | (side & 0x01); - continue; - } + pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; + pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; } - } + } else { + shift -= 1; + for (i = 0; i < frameCount4; ++i) { + __m128i mid; + __m128i side; + __m128i left; + __m128i right; - /* - We found the page that that is closest to the sample, so now we need to find it. The first thing to do is seek to the - start of that page. In the loop above we checked that it was a fresh page which means this page is also the start of - a new frame. This property means that after we've seeked to the page we can immediately start looping over frames until - we find the one containing the target sample. - */ - if (!drflac_oggbs__seek_physical(oggbs, runningFrameBytePos, drflac_seek_origin_start)) { - return DRFLAC_FALSE; - } - if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { - return DRFLAC_FALSE; - } + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - /* - At this point we'll be sitting on the first byte of the frame header of the first frame in the page. We just keep - looping over these frames until we find the one containing the sample we're after. - */ - runningSampleCount = runningGranulePosition; - for (;;) { - /* - There are two ways to find the sample and seek past irrelevant frames: - 1) Use the native FLAC decoder. - 2) Use Ogg's framing system. - - Both of these options have their own pros and cons. Using the native FLAC decoder is slower because it needs to - do a full decode of the frame. Using Ogg's framing system is faster, but more complicated and involves some code - duplication for the decoding of frame headers. - - Another thing to consider is that using the Ogg framing system will perform direct seeking of the physical Ogg - bitstream. This is important to consider because it means we cannot read data from the drflac_bs object using the - standard drflac__*() APIs because that will read in extra data for its own internal caching which in turn breaks - the positioning of the read pointer of the physical Ogg bitstream. Therefore, anything that would normally be read - using the native FLAC decoding APIs, such as drflac__read_next_flac_frame_header(), need to be re-implemented so as to - avoid the use of the drflac_bs object. - - Considering these issues, I have decided to use the slower native FLAC decoding method for the following reasons: - 1) Seeking is already partially accelerated using Ogg's paging system in the code block above. - 2) Seeking in an Ogg encapsulated FLAC stream is probably quite uncommon. - 3) Simplicity. - */ - drflac_uint64 firstSampleInFrame = 0; - drflac_uint64 lastSampleInFrame = 0; - drflac_uint64 sampleCountInThisFrame; + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { - return DRFLAC_FALSE; + left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); + right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); + + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); } - drflac__get_current_frame_sample_range(pFlac, &firstSampleInFrame, &lastSampleInFrame); + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - sampleCountInThisFrame = (lastSampleInFrame - firstSampleInFrame) + 1; - if (sampleIndex < (runningSampleCount + sampleCountInThisFrame)) { - /* - The sample should be in this frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend - it never existed and keep iterating. - */ - drflac_result result = drflac__decode_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ - drflac_uint64 samplesToDecode = (size_t)(sampleIndex - runningSampleCount); /* <-- Safe cast because the maximum number of samples in a frame is 65535. */ - if (samplesToDecode == 0) { - return DRFLAC_TRUE; - } - return drflac__seek_forward_by_samples(pFlac, samplesToDecode) == samplesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ - } else { - if (result == DRFLAC_CRC_MISMATCH) { - continue; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } - } - } else { - /* - It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this - frame never existed and leave the running sample count untouched. - */ - drflac_result result = drflac__seek_to_next_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - runningSampleCount += sampleCountInThisFrame; - } else { - if (result == DRFLAC_CRC_MISMATCH) { - continue; /* CRC mismatch. Pretend this frame never existed. */ - } else { - return DRFLAC_FALSE; - } - } + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); + pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); } } } +#endif - -drflac_bool32 drflac__init_private__ogg(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_ogg_page_header header; - drflac_uint32 crc32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; - drflac_uint32 bytesRead = 0; - - /* Pre Condition: The bit stream should be sitting just past the 4-byte OggS capture pattern. */ - (void)relaxed; - - pInit->container = drflac_container_ogg; - pInit->oggFirstBytePos = 0; - - /* - We'll get here if the first 4 bytes of the stream were the OggS capture pattern, however it doesn't necessarily mean the - stream includes FLAC encoded audio. To check for this we need to scan the beginning-of-stream page markers and check if - any match the FLAC specification. Important to keep in mind that the stream may be multiplexed. - */ - if (drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { - return DRFLAC_FALSE; - } - pInit->runningFilePos += bytesRead; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_int32 shift = unusedBitsPerSample; + int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ + int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ + uint32x4_t one4; - for (;;) { - int pageBodySize; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - /* Break if we're past the beginning of stream page. */ - if ((header.headerType & 0x02) == 0) { - return DRFLAC_FALSE; - } + wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + one4 = vdupq_n_u32(1); - /* Check if it's a FLAC header. */ - pageBodySize = drflac_ogg__get_page_body_size(&header); - if (pageBodySize == 51) { /* 51 = the lacing value of the FLAC header packet. */ - /* It could be a FLAC page... */ - drflac_uint32 bytesRemainingInPage = pageBodySize; - drflac_uint8 packetType; + if (shift == 0) { + for (i = 0; i < frameCount4; ++i) { + uint32x4_t mid; + uint32x4_t side; + int32x4_t left; + int32x4_t right; - if (onRead(pUserData, &packetType, 1) != 1) { - return DRFLAC_FALSE; - } + mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); - bytesRemainingInPage -= 1; - if (packetType == 0x7F) { - /* Increasingly more likely to be a FLAC page... */ - drflac_uint8 sig[4]; - if (onRead(pUserData, sig, 4) != 4) { - return DRFLAC_FALSE; - } + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); - bytesRemainingInPage -= 4; - if (sig[0] == 'F' && sig[1] == 'L' && sig[2] == 'A' && sig[3] == 'C') { - /* Almost certainly a FLAC page... */ - drflac_uint8 mappingVersion[2]; - if (onRead(pUserData, mappingVersion, 2) != 2) { - return DRFLAC_FALSE; - } + left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); + right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); - if (mappingVersion[0] != 1) { - return DRFLAC_FALSE; /* Only supporting version 1.x of the Ogg mapping. */ - } + drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); + } - /* - The next 2 bytes are the non-audio packets, not including this one. We don't care about this because we're going to - be handling it in a generic way based on the serial number and packet types. - */ - if (!onSeek(pUserData, 2, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - /* Expecting the native FLAC signature "fLaC". */ - if (onRead(pUserData, sig, 4) != 4) { - return DRFLAC_FALSE; - } + mid = (mid << 1) | (side & 0x01); - if (sig[0] == 'f' && sig[1] == 'L' && sig[2] == 'a' && sig[3] == 'C') { - /* The remaining data in the page should be the STREAMINFO block. */ - drflac_streaminfo streaminfo; - drflac_uint8 isLastBlock; - drflac_uint8 blockType; - drflac_uint32 blockSize; - if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { - return DRFLAC_FALSE; - } + pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; + pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; + } + } else { + int32x4_t shift4; - if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { - return DRFLAC_FALSE; /* Invalid block type. First block must be the STREAMINFO block. */ - } + shift -= 1; + shift4 = vdupq_n_s32(shift); - if (drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { - /* Success! */ - pInit->hasStreamInfoBlock = DRFLAC_TRUE; - pInit->sampleRate = streaminfo.sampleRate; - pInit->channels = streaminfo.channels; - pInit->bitsPerSample = streaminfo.bitsPerSample; - pInit->totalSampleCount = streaminfo.totalSampleCount; - pInit->maxBlockSize = streaminfo.maxBlockSize; - pInit->hasMetadataBlocks = !isLastBlock; + for (i = 0; i < frameCount4; ++i) { + uint32x4_t mid; + uint32x4_t side; + int32x4_t left; + int32x4_t right; - if (onMeta) { - drflac_metadata metadata; - metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; - metadata.pRawData = NULL; - metadata.rawDataSize = 0; - metadata.data.streaminfo = streaminfo; - onMeta(pUserDataMD, &metadata); - } + mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); - pInit->runningFilePos += pageBodySize; - pInit->oggFirstBytePos = pInit->runningFilePos - 79; /* Subtracting 79 will place us right on top of the "OggS" identifier of the FLAC bos page. */ - pInit->oggSerial = header.serialNumber; - pInit->oggBosHeader = header; - break; - } else { - /* Failed to read STREAMINFO block. Aww, so close... */ - return DRFLAC_FALSE; - } - } else { - /* Invalid file. */ - return DRFLAC_FALSE; - } - } else { - /* Not a FLAC header. Skip it. */ - if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } - } - } else { - /* Not a FLAC header. Seek past the entire page and move on to the next. */ - if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } - } - } else { - if (!onSeek(pUserData, pageBodySize, drflac_seek_origin_current)) { - return DRFLAC_FALSE; - } + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); + + left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); + right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); + + drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); } - pInit->runningFilePos += pageBodySize; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + mid = (mid << 1) | (side & 0x01); - /* Read the header of the next page. */ - if (drflac_ogg__read_page_header(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { - return DRFLAC_FALSE; + pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); + pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); } - pInit->runningFilePos += bytesRead; } +} +#endif - /* - If we get here it means we found a FLAC audio stream. We should be sitting on the first byte of the header of the next page. The next - packets in the FLAC logical stream contain the metadata. The only thing left to do in the initialization phase for Ogg is to create the - Ogg bistream object. - */ - pInit->hasMetadataBlocks = DRFLAC_TRUE; /* <-- Always have at least VORBIS_COMMENT metadata block. */ - return DRFLAC_TRUE; +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s32__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } +} + + +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + for (drflac_uint64 i = 0; i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)); + pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)); + } } #endif -drflac_bool32 drflac__init_private(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) { - drflac_bool32 relaxed; - drflac_uint8 id[4]; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - if (pInit == NULL || onRead == NULL || onSeek == NULL) { - return DRFLAC_FALSE; + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; + + pOutputSamples[i*8+0] = (drflac_int32)tempL0; + pOutputSamples[i*8+1] = (drflac_int32)tempR0; + pOutputSamples[i*8+2] = (drflac_int32)tempL1; + pOutputSamples[i*8+3] = (drflac_int32)tempR1; + pOutputSamples[i*8+4] = (drflac_int32)tempL2; + pOutputSamples[i*8+5] = (drflac_int32)tempR2; + pOutputSamples[i*8+6] = (drflac_int32)tempL3; + pOutputSamples[i*8+7] = (drflac_int32)tempR3; } - drflac_zero_memory(pInit, sizeof(*pInit)); - pInit->onRead = onRead; - pInit->onSeek = onSeek; - pInit->onMeta = onMeta; - pInit->container = container; - pInit->pUserData = pUserData; - pInit->pUserDataMD = pUserDataMD; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); + } +} - pInit->bs.onRead = onRead; - pInit->bs.onSeek = onSeek; - pInit->bs.pUserData = pUserData; - drflac__reset_cache(&pInit->bs); +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + for (i = 0; i < frameCount4; ++i) { + __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); - /* If the container is explicitly defined then we can try opening in relaxed mode. */ - relaxed = container != drflac_container_unknown; + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); + } - /* Skip over any ID3 tags. */ - for (;;) { - if (onRead(pUserData, id, 4) != 4) { - return DRFLAC_FALSE; /* Ran out of data. */ - } - pInit->runningFilePos += 4; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); + } +} +#endif - if (id[0] == 'I' && id[1] == 'D' && id[2] == '3') { - drflac_uint8 header[6]; - drflac_uint8 flags; - drflac_uint32 headerSize; +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - if (onRead(pUserData, header, 6) != 6) { - return DRFLAC_FALSE; /* Ran out of data. */ - } - pInit->runningFilePos += 6; + int32x4_t shift4_0 = vdupq_n_s32(shift0); + int32x4_t shift4_1 = vdupq_n_s32(shift1); - flags = header[1]; + for (i = 0; i < frameCount4; ++i) { + int32x4_t left; + int32x4_t right; - drflac_copy_memory(&headerSize, header+2, 4); - headerSize = drflac__unsynchsafe_32(drflac__be2host_32(headerSize)); - if (flags & 0x10) { - headerSize += 10; - } + left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift4_0)); + right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift4_1)); - if (!onSeek(pUserData, headerSize, drflac_seek_origin_current)) { - return DRFLAC_FALSE; /* Failed to seek past the tag. */ - } - pInit->runningFilePos += headerSize; - } else { - break; - } + drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); } - if (id[0] == 'f' && id[1] == 'L' && id[2] == 'a' && id[3] == 'C') { - return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); - } -#ifndef DR_FLAC_NO_OGG - if (id[0] == 'O' && id[1] == 'g' && id[2] == 'g' && id[3] == 'S') { - return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); } +} #endif - /* If we get here it means we likely don't have a header. Try opening in relaxed mode, if applicable. */ - if (relaxed) { - if (container == drflac_container_native) { - return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); - } -#ifndef DR_FLAC_NO_OGG - if (container == drflac_container_ogg) { - return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); +static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) +{ +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s32__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } +} + + +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut) +{ + drflac_uint64 framesRead; + drflac_uint32 unusedBitsPerSample; + + if (pFlac == NULL || framesToRead == 0) { + return 0; + } + + if (pBufferOut == NULL) { + return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); + } + + DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); + unusedBitsPerSample = 32 - pFlac->bitsPerSample; + + framesRead = 0; + while (framesToRead > 0) { + /* If we've run out of samples in this frame, go to the next. */ + if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { + if (!drflac__read_and_decode_next_flac_frame(pFlac)) { + break; /* Couldn't read the next frame, so just break from the loop and return. */ + } + } else { + unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); + drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; + drflac_uint64 frameCountThisIteration = framesToRead; + + if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { + frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; + } + + if (channelCount == 2) { + const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; + const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; + + switch (pFlac->currentFLACFrame.header.channelAssignment) + { + case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: + { + drflac_read_pcm_frames_s32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; + + case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: + { + drflac_read_pcm_frames_s32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; + + case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: + { + drflac_read_pcm_frames_s32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; + + case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: + default: + { + drflac_read_pcm_frames_s32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; + } + } else { + /* Generic interleaving. */ + drflac_uint64 i; + for (i = 0; i < frameCountThisIteration; ++i) { + unsigned int j; + for (j = 0; j < channelCount; ++j) { + pBufferOut[(i*channelCount)+j] = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); + } + } + } + + framesRead += frameCountThisIteration; + pBufferOut += frameCountThisIteration * channelCount; + framesToRead -= frameCountThisIteration; + pFlac->currentPCMFrame += frameCountThisIteration; + pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; } -#endif } - /* Unsupported container. */ - return DRFLAC_FALSE; + return framesRead; } -void drflac__init_from_info(drflac* pFlac, drflac_init_info* pInit) -{ - drflac_assert(pFlac != NULL); - drflac_assert(pInit != NULL); - - drflac_zero_memory(pFlac, sizeof(*pFlac)); - pFlac->bs = pInit->bs; - pFlac->onMeta = pInit->onMeta; - pFlac->pUserDataMD = pInit->pUserDataMD; - pFlac->maxBlockSize = pInit->maxBlockSize; - pFlac->sampleRate = pInit->sampleRate; - pFlac->channels = (drflac_uint8)pInit->channels; - pFlac->bitsPerSample = (drflac_uint8)pInit->bitsPerSample; - pFlac->totalSampleCount = pInit->totalSampleCount; - pFlac->totalPCMFrameCount = pInit->totalSampleCount / pFlac->channels; - pFlac->container = pInit->container; -} -drflac* drflac_open_with_metadata_private(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD) +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac_init_info init; - drflac_uint32 allocationSize; - drflac_uint32 wholeSIMDVectorCountPerChannel; - drflac_uint32 decodedSamplesAllocationSize; -#ifndef DR_FLAC_NO_OGG - drflac_uint32 oggbsAllocationSize; - drflac_oggbs oggbs; -#endif - drflac_uint64 firstFramePos; - drflac_uint64 seektablePos; - drflac_uint32 seektableSize; - drflac* pFlac; + drflac_uint64 i; + for (i = 0; i < frameCount; ++i) { + drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 right = left - side; -#ifndef DRFLAC_NO_CPUID - /* CPU support first. */ - drflac__init_cpu_caps(); -#endif + left >>= 16; + right >>= 16; - if (!drflac__init_private(&init, onRead, onSeek, onMeta, container, pUserData, pUserDataMD)) { - return NULL; + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; } +} +#endif - /* - The size of the allocation for the drflac object needs to be large enough to fit the following: - 1) The main members of the drflac structure - 2) A block of memory large enough to store the decoded samples of the largest frame in the stream - 3) If the container is Ogg, a drflac_oggbs object - - The complicated part of the allocation is making sure there's enough room the decoded samples, taking into consideration - the different SIMD instruction sets. - */ - allocationSize = sizeof(drflac); +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - /* - The allocation size for decoded frames depends on the number of 32-bit integers that fit inside the largest SIMD vector - we are supporting. - */ - if (((init.maxBlockSize+DRFLAC_LEADING_SAMPLES) % (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) == 0) { - wholeSIMDVectorCountPerChannel = ((init.maxBlockSize+DRFLAC_LEADING_SAMPLES) / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))); - } else { - wholeSIMDVectorCountPerChannel = ((init.maxBlockSize+DRFLAC_LEADING_SAMPLES) / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) + 1; + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 right0 = left0 - side0; + drflac_uint32 right1 = left1 - side1; + drflac_uint32 right2 = left2 - side2; + drflac_uint32 right3 = left3 - side3; + + left0 >>= 16; + left1 >>= 16; + left2 >>= 16; + left3 >>= 16; + + right0 >>= 16; + right1 >>= 16; + right2 >>= 16; + right3 >>= 16; + + pOutputSamples[i*8+0] = (drflac_int16)left0; + pOutputSamples[i*8+1] = (drflac_int16)right0; + pOutputSamples[i*8+2] = (drflac_int16)left1; + pOutputSamples[i*8+3] = (drflac_int16)right1; + pOutputSamples[i*8+4] = (drflac_int16)left2; + pOutputSamples[i*8+5] = (drflac_int16)right2; + pOutputSamples[i*8+6] = (drflac_int16)left3; + pOutputSamples[i*8+7] = (drflac_int16)right3; } - decodedSamplesAllocationSize = wholeSIMDVectorCountPerChannel * DRFLAC_MAX_SIMD_VECTOR_SIZE * init.channels; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - allocationSize += decodedSamplesAllocationSize; - allocationSize += DRFLAC_MAX_SIMD_VECTOR_SIZE; /* Allocate extra bytes to ensure we have enough for alignment. */ + left >>= 16; + right >>= 16; -#ifndef DR_FLAC_NO_OGG - /* There's additional data required for Ogg streams. */ - oggbsAllocationSize = 0; - if (init.container == drflac_container_ogg) { - oggbsAllocationSize = sizeof(drflac_oggbs); - allocationSize += oggbsAllocationSize; + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; } +} - drflac_zero_memory(&oggbs, sizeof(oggbs)); - if (init.container == drflac_container_ogg) { - oggbs.onRead = onRead; - oggbs.onSeek = onSeek; - oggbs.pUserData = pUserData; - oggbs.currentBytePos = init.oggFirstBytePos; - oggbs.firstBytePos = init.oggFirstBytePos; - oggbs.serialNumber = init.oggSerial; - oggbs.bosPageHeader = init.oggBosHeader; - oggbs.bytesRemainingInPage = 0; - } -#endif +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - /* - This part is a bit awkward. We need to load the seektable so that it can be referenced in-memory, but I want the drflac object to - consist of only a single heap allocation. To this, the size of the seek table needs to be known, which we determine when reading - and decoding the metadata. - */ - firstFramePos = 42; /* <-- We know we are at byte 42 at this point. */ - seektablePos = 0; - seektableSize = 0; - if (init.hasMetadataBlocks) { - drflac_read_proc onReadOverride = onRead; - drflac_seek_proc onSeekOverride = onSeek; - void* pUserDataOverride = pUserData; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); -#ifndef DR_FLAC_NO_OGG - if (init.container == drflac_container_ogg) { - onReadOverride = drflac__on_read_ogg; - onSeekOverride = drflac__on_seek_ogg; - pUserDataOverride = (void*)&oggbs; - } -#endif + for (i = 0; i < frameCount4; ++i) { + __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); + __m128i right = _mm_sub_epi32(left, side); - if (!drflac__read_and_decode_metadata(onReadOverride, onSeekOverride, onMeta, pUserDataOverride, pUserDataMD, &firstFramePos, &seektablePos, &seektableSize)) { - return NULL; - } + left = _mm_srai_epi32(left, 16); + right = _mm_srai_epi32(right, 16); - allocationSize += seektableSize; + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); } + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - pFlac = (drflac*)DRFLAC_MALLOC(allocationSize); - drflac__init_from_info(pFlac, &init); - pFlac->pDecodedSamples = (drflac_int32*)drflac_align((size_t)pFlac->pExtraData, DRFLAC_MAX_SIMD_VECTOR_SIZE); - -#ifndef DR_FLAC_NO_OGG - if (init.container == drflac_container_ogg) { - drflac_oggbs* pInternalOggbs = (drflac_oggbs*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize + seektableSize); - *pInternalOggbs = oggbs; + left >>= 16; + right >>= 16; - /* The Ogg bistream needs to be layered on top of the original bitstream. */ - pFlac->bs.onRead = drflac__on_read_ogg; - pFlac->bs.onSeek = drflac__on_seek_ogg; - pFlac->bs.pUserData = (void*)pInternalOggbs; - pFlac->_oggbs = (void*)pInternalOggbs; + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; } +} #endif - pFlac->firstFramePos = firstFramePos; +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + int32x4_t shift0_4; + int32x4_t shift1_4; - /* NOTE: Seektables are not currently compatible with Ogg encapsulation (Ogg has its own accelerated seeking system). I may change this later, so I'm leaving this here for now. */ -#ifndef DR_FLAC_NO_OGG - if (init.container == drflac_container_ogg) - { - pFlac->pSeekpoints = NULL; - pFlac->seekpointCount = 0; - } - else -#endif - { - /* If we have a seektable we need to load it now, making sure we move back to where we were previously. */ - if (seektablePos != 0) { - pFlac->seekpointCount = seektableSize / sizeof(*pFlac->pSeekpoints); - pFlac->pSeekpoints = (drflac_seekpoint*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize); + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - /* Seek to the seektable, then just read directly into our seektable buffer. */ - if (pFlac->bs.onSeek(pFlac->bs.pUserData, (int)seektablePos, drflac_seek_origin_start)) { - if (pFlac->bs.onRead(pFlac->bs.pUserData, pFlac->pSeekpoints, seektableSize) == seektableSize) { - /* Endian swap. */ - drflac_uint32 iSeekpoint; - for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { - pFlac->pSeekpoints[iSeekpoint].firstSample = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].firstSample); - pFlac->pSeekpoints[iSeekpoint].frameOffset = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].frameOffset); - pFlac->pSeekpoints[iSeekpoint].sampleCount = drflac__be2host_16(pFlac->pSeekpoints[iSeekpoint].sampleCount); - } - } else { - /* Failed to read the seektable. Pretend we don't have one. */ - pFlac->pSeekpoints = NULL; - pFlac->seekpointCount = 0; - } + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); - /* We need to seek back to where we were. If this fails it's a critical error. */ - if (!pFlac->bs.onSeek(pFlac->bs.pUserData, (int)pFlac->firstFramePos, drflac_seek_origin_start)) { - DRFLAC_FREE(pFlac); - return NULL; - } - } else { - /* Failed to seek to the seektable. Ominous sign, but for now we can just pretend we don't have one. */ - pFlac->pSeekpoints = NULL; - pFlac->seekpointCount = 0; - } - } - } + for (i = 0; i < frameCount4; ++i) { + uint32x4_t left; + uint32x4_t side; + uint32x4_t right; - - /* - If we get here, but don't have a STREAMINFO block, it means we've opened the stream in relaxed mode and need to decode - the first frame. - */ - if (!init.hasStreamInfoBlock) { - pFlac->currentFrame.header = init.firstFrameHeader; - do - { - drflac_result result = drflac__decode_flac_frame(pFlac); - if (result == DRFLAC_SUCCESS) { - break; - } else { - if (result == DRFLAC_CRC_MISMATCH) { - if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFrame.header)) { - DRFLAC_FREE(pFlac); - return NULL; - } - continue; - } else { - DRFLAC_FREE(pFlac); - return NULL; - } - } - } while (1); - } + left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + right = vsubq_u32(left, side); - return pFlac; -} + left = vshrq_n_u32(left, 16); + right = vshrq_n_u32(right, 16); + drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); + } + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; -#ifndef DR_FLAC_NO_STDIO -#include + left >>= 16; + right >>= 16; -static size_t drflac__on_read_stdio(void* pUserData, void* bufferOut, size_t bytesToRead) + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; + } +} +#endif + +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - return fread(bufferOut, 1, bytesToRead, (FILE*)pUserData); +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s16__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s16__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } } -static drflac_bool32 drflac__on_seek_stdio(void* pUserData, int offset, drflac_seek_origin origin) + +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac_assert(offset >= 0); /* <-- Never seek backwards. */ + drflac_uint64 i; + for (i = 0; i < frameCount; ++i) { + drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 left = right + side; - return fseek((FILE*)pUserData, offset, (origin == drflac_seek_origin_current) ? SEEK_CUR : SEEK_SET) == 0; + left >>= 16; + right >>= 16; + + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; + } } +#endif -static FILE* drflac__fopen(const char* filename) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - FILE* pFile; -#if defined(_MSC_VER) && _MSC_VER >= 1400 - if (fopen_s(&pFile, filename, "rb") != 0) { - return NULL; - } -#else - pFile = fopen(filename, "rb"); - if (pFile == NULL) { - return NULL; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 left0 = right0 + side0; + drflac_uint32 left1 = right1 + side1; + drflac_uint32 left2 = right2 + side2; + drflac_uint32 left3 = right3 + side3; + + left0 >>= 16; + left1 >>= 16; + left2 >>= 16; + left3 >>= 16; + + right0 >>= 16; + right1 >>= 16; + right2 >>= 16; + right3 >>= 16; + + pOutputSamples[i*8+0] = (drflac_int16)left0; + pOutputSamples[i*8+1] = (drflac_int16)right0; + pOutputSamples[i*8+2] = (drflac_int16)left1; + pOutputSamples[i*8+3] = (drflac_int16)right1; + pOutputSamples[i*8+4] = (drflac_int16)left2; + pOutputSamples[i*8+5] = (drflac_int16)right2; + pOutputSamples[i*8+6] = (drflac_int16)left3; + pOutputSamples[i*8+7] = (drflac_int16)right3; } -#endif - return pFile; -} + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; + left >>= 16; + right >>= 16; -drflac* drflac_open_file(const char* filename) + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; + } +} + +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac* pFlac; - FILE* pFile; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - pFile = drflac__fopen(filename); - if (pFile == NULL) { - return NULL; - } + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile); - if (pFlac == NULL) { - fclose(pFile); - return NULL; + for (i = 0; i < frameCount4; ++i) { + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); + __m128i left = _mm_add_epi32(right, side); + + left = _mm_srai_epi32(left, 16); + right = _mm_srai_epi32(right, 16); + + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); } - return pFlac; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; + + left >>= 16; + right >>= 16; + + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; + } } +#endif -drflac* drflac_open_file_with_metadata(const char* filename, drflac_meta_proc onMeta, void* pUserData) +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac* pFlac; - FILE* pFile; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + int32x4_t shift0_4; + int32x4_t shift1_4; - pFile = drflac__fopen(filename); - if (pFile == NULL) { - return NULL; - } + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData); - if (pFlac == NULL) { - fclose(pFile); - return pFlac; - } + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); - return pFlac; -} -#endif /* DR_FLAC_NO_STDIO */ + for (i = 0; i < frameCount4; ++i) { + uint32x4_t side; + uint32x4_t right; + uint32x4_t left; -static size_t drflac__on_read_memory(void* pUserData, void* bufferOut, size_t bytesToRead) -{ - drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; - size_t bytesRemaining; + side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + left = vaddq_u32(right, side); - drflac_assert(memoryStream != NULL); - drflac_assert(memoryStream->dataSize >= memoryStream->currentReadPos); + left = vshrq_n_u32(left, 16); + right = vshrq_n_u32(right, 16); - bytesRemaining = memoryStream->dataSize - memoryStream->currentReadPos; - if (bytesToRead > bytesRemaining) { - bytesToRead = bytesRemaining; + drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); } - if (bytesToRead > 0) { - drflac_copy_memory(bufferOut, memoryStream->data + memoryStream->currentReadPos, bytesToRead); - memoryStream->currentReadPos += bytesToRead; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; + + left >>= 16; + right >>= 16; + + pOutputSamples[i*2+0] = (drflac_int16)left; + pOutputSamples[i*2+1] = (drflac_int16)right; } +} +#endif - return bytesToRead; +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s16__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s16__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } } -static drflac_bool32 drflac__on_seek_memory(void* pUserData, int offset, drflac_seek_origin origin) + +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; + for (drflac_uint64 i = 0; i < frameCount; ++i) { + drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - drflac_assert(memoryStream != NULL); - drflac_assert(offset >= 0); /* <-- Never seek backwards. */ + mid = (mid << 1) | (side & 0x01); - if (offset > (drflac_int64)memoryStream->dataSize) { - return DRFLAC_FALSE; + pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); } +} +#endif - if (origin == drflac_seek_origin_current) { - if (memoryStream->currentReadPos + offset <= memoryStream->dataSize) { - memoryStream->currentReadPos += offset; - } else { - return DRFLAC_FALSE; /* Trying to seek too far forward. */ +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample; + + if (shift > 0) { + shift -= 1; + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = (mid0 + side0) << shift; + temp1L = (mid1 + side1) << shift; + temp2L = (mid2 + side2) << shift; + temp3L = (mid3 + side3) << shift; + + temp0R = (mid0 - side0) << shift; + temp1R = (mid1 - side1) << shift; + temp2R = (mid2 - side2) << shift; + temp3R = (mid3 - side3) << shift; + + temp0L >>= 16; + temp1L >>= 16; + temp2L >>= 16; + temp3L >>= 16; + + temp0R >>= 16; + temp1R >>= 16; + temp2R >>= 16; + temp3R >>= 16; + + pOutputSamples[i*8+0] = (drflac_int16)temp0L; + pOutputSamples[i*8+1] = (drflac_int16)temp0R; + pOutputSamples[i*8+2] = (drflac_int16)temp1L; + pOutputSamples[i*8+3] = (drflac_int16)temp1R; + pOutputSamples[i*8+4] = (drflac_int16)temp2L; + pOutputSamples[i*8+5] = (drflac_int16)temp2R; + pOutputSamples[i*8+6] = (drflac_int16)temp3L; + pOutputSamples[i*8+7] = (drflac_int16)temp3R; } } else { - if ((drflac_uint32)offset <= memoryStream->dataSize) { - memoryStream->currentReadPos = offset; - } else { - return DRFLAC_FALSE; /* Trying to seek too far forward. */ + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = ((drflac_int32)(mid0 + side0) >> 1); + temp1L = ((drflac_int32)(mid1 + side1) >> 1); + temp2L = ((drflac_int32)(mid2 + side2) >> 1); + temp3L = ((drflac_int32)(mid3 + side3) >> 1); + + temp0R = ((drflac_int32)(mid0 - side0) >> 1); + temp1R = ((drflac_int32)(mid1 - side1) >> 1); + temp2R = ((drflac_int32)(mid2 - side2) >> 1); + temp3R = ((drflac_int32)(mid3 - side3) >> 1); + + temp0L >>= 16; + temp1L >>= 16; + temp2L >>= 16; + temp3L >>= 16; + + temp0R >>= 16; + temp1R >>= 16; + temp2R >>= 16; + temp3R >>= 16; + + pOutputSamples[i*8+0] = (drflac_int16)temp0L; + pOutputSamples[i*8+1] = (drflac_int16)temp0R; + pOutputSamples[i*8+2] = (drflac_int16)temp1L; + pOutputSamples[i*8+3] = (drflac_int16)temp1R; + pOutputSamples[i*8+4] = (drflac_int16)temp2L; + pOutputSamples[i*8+5] = (drflac_int16)temp2R; + pOutputSamples[i*8+6] = (drflac_int16)temp3L; + pOutputSamples[i*8+7] = (drflac_int16)temp3R; } } - return DRFLAC_TRUE; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); + } } -drflac* drflac_open_memory(const void* data, size_t dataSize) +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - drflac__memory_stream memoryStream; - drflac* pFlac; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample; - memoryStream.data = (const unsigned char*)data; - memoryStream.dataSize = dataSize; - memoryStream.currentReadPos = 0; - pFlac = drflac_open(drflac__on_read_memory, drflac__on_seek_memory, &memoryStream); - if (pFlac == NULL) { - return NULL; - } + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - pFlac->memoryStream = memoryStream; + if (shift == 0) { + for (i = 0; i < frameCount4; ++i) { + __m128i mid; + __m128i side; + __m128i left; + __m128i right; - /* This is an awful hack... */ -#ifndef DR_FLAC_NO_OGG - if (pFlac->container == drflac_container_ogg) - { - drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; - oggbs->pUserData = &pFlac->memoryStream; - } - else -#endif - { - pFlac->bs.pUserData = &pFlac->memoryStream; - } + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - return pFlac; -} + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); -drflac* drflac_open_memory_with_metadata(const void* data, size_t dataSize, drflac_meta_proc onMeta, void* pUserData) -{ - drflac__memory_stream memoryStream; - drflac* pFlac; + left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); + right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); - memoryStream.data = (const unsigned char*)data; - memoryStream.dataSize = dataSize; - memoryStream.currentReadPos = 0; - pFlac = drflac_open_with_metadata_private(drflac__on_read_memory, drflac__on_seek_memory, onMeta, drflac_container_unknown, &memoryStream, pUserData); - if (pFlac == NULL) { - return NULL; - } + left = _mm_srai_epi32(left, 16); + right = _mm_srai_epi32(right, 16); - pFlac->memoryStream = memoryStream; + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); + } - /* This is an awful hack... */ -#ifndef DR_FLAC_NO_OGG - if (pFlac->container == drflac_container_ogg) - { - drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; - oggbs->pUserData = &pFlac->memoryStream; - } - else -#endif - { - pFlac->bs.pUserData = &pFlac->memoryStream; - } + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - return pFlac; -} + mid = (mid << 1) | (side & 0x01); + pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); + } + } else { + shift -= 1; + for (i = 0; i < frameCount4; ++i) { + __m128i mid; + __m128i side; + __m128i left; + __m128i right; + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); -drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData) -{ - return drflac_open_with_metadata_private(onRead, onSeek, NULL, drflac_container_unknown, pUserData, pUserData); -} -drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData) -{ - return drflac_open_with_metadata_private(onRead, onSeek, NULL, container, pUserData, pUserData); -} + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); -drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData) -{ - return drflac_open_with_metadata_private(onRead, onSeek, onMeta, drflac_container_unknown, pUserData, pUserData); -} -drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData) -{ - return drflac_open_with_metadata_private(onRead, onSeek, onMeta, container, pUserData, pUserData); -} + left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); + right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); -void drflac_close(drflac* pFlac) -{ - if (pFlac == NULL) { - return; - } + left = _mm_srai_epi32(left, 16); + right = _mm_srai_epi32(right, 16); -#ifndef DR_FLAC_NO_STDIO - /* - If we opened the file with drflac_open_file() we will want to close the file handle. We can know whether or not drflac_open_file() - was used by looking at the callbacks. - */ - if (pFlac->bs.onRead == drflac__on_read_stdio) { - fclose((FILE*)pFlac->bs.pUserData); - } + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); + } -#ifndef DR_FLAC_NO_OGG - /* Need to clean up Ogg streams a bit differently due to the way the bit streaming is chained. */ - if (pFlac->container == drflac_container_ogg) { - drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; - drflac_assert(pFlac->bs.onRead == drflac__on_read_ogg); + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - if (oggbs->onRead == drflac__on_read_stdio) { - fclose((FILE*)oggbs->pUserData); + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); } } -#endif -#endif - - DRFLAC_FREE(pFlac); } +#endif -drflac_uint64 drflac__read_s32__misaligned(drflac* pFlac, drflac_uint64 samplesToRead, drflac_int32* bufferOut) +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { - unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - drflac_uint64 samplesRead; + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample; + int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ + int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ - /* We should never be calling this when the number of samples to read is >= the sample count. */ - drflac_assert(samplesToRead < channelCount); - drflac_assert(pFlac->currentFrame.samplesRemaining > 0 && samplesToRead <= pFlac->currentFrame.samplesRemaining); + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); - samplesRead = 0; - while (samplesToRead > 0) { - drflac_uint64 totalSamplesInFrame = pFlac->currentFrame.header.blockSize * channelCount; - drflac_uint64 samplesReadFromFrameSoFar = totalSamplesInFrame - pFlac->currentFrame.samplesRemaining; - drflac_uint64 channelIndex = samplesReadFromFrameSoFar % channelCount; - drflac_uint64 nextSampleInFrame = samplesReadFromFrameSoFar / channelCount; - int decodedSample = 0; + wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - switch (pFlac->currentFrame.header.channelAssignment) - { - case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: - { - if (channelIndex == 0) { - decodedSample = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - } else { - int side = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - int left = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex - 1].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex - 1].wastedBitsPerSample); - decodedSample = left - side; - } - } break; + if (shift == 0) { + for (i = 0; i < frameCount4; ++i) { + uint32x4_t mid; + uint32x4_t side; + int32x4_t left; + int32x4_t right; - case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: - { - if (channelIndex == 0) { - int side = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - int right = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 1].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 1].wastedBitsPerSample); - decodedSample = side + right; - } else { - decodedSample = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - } - } break; + mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); - case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: - { - int mid; - int side; - if (channelIndex == 0) { - mid = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - side = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 1].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 1].wastedBitsPerSample); - - mid = (((unsigned int)mid) << 1) | (side & 0x01); - decodedSample = (mid + side) >> 1; - } else { - mid = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex - 1].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex - 1].wastedBitsPerSample); - side = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); - mid = (((unsigned int)mid) << 1) | (side & 0x01); - decodedSample = (mid - side) >> 1; - } - } break; + left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); + right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); - case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: - default: - { - decodedSample = (int)((drflac_uint32)pFlac->currentFrame.subframes[channelIndex + 0].pDecodedSamples[nextSampleInFrame] << pFlac->currentFrame.subframes[channelIndex + 0].wastedBitsPerSample); - } break; + left = vshrq_n_s32(left, 16); + right = vshrq_n_s32(right, 16); + + drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); } - decodedSample = (int)((drflac_uint32)decodedSample << (32 - pFlac->bitsPerSample)); + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); - if (bufferOut) { - *bufferOut++ = decodedSample; + pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); } + } else { + int32x4_t shift4; - samplesRead += 1; - pFlac->currentFrame.samplesRemaining -= 1; - samplesToRead -= 1; - } + shift -= 1; + shift4 = vdupq_n_s32(shift); - return samplesRead; -} + for (i = 0; i < frameCount4; ++i) { + uint32x4_t mid; + uint32x4_t side; + int32x4_t left; + int32x4_t right; -drflac_uint64 drflac_read_s32(drflac* pFlac, drflac_uint64 samplesToRead, drflac_int32* bufferOut) -{ - drflac_uint64 samplesRead; + mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); - /* Note that is allowed to be null, in which case this will act like a seek. */ - if (pFlac == NULL || samplesToRead == 0) { - return 0; - } + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); + + left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); + right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); - if (bufferOut == NULL) { - return drflac__seek_forward_by_samples(pFlac, samplesToRead); + left = vshrq_n_s32(left, 16); + right = vshrq_n_s32(right, 16); + + drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); + } } +} +#endif - samplesRead = 0; - while (samplesToRead > 0) { - /* If we've run out of samples in this frame, go to the next. */ - if (pFlac->currentFrame.samplesRemaining == 0) { - if (!drflac__read_and_decode_next_flac_frame(pFlac)) { - break; /* Couldn't read the next frame, so just break from the loop and return. */ - } - } else { - /* Here is where we grab the samples and interleave them. */ - unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - drflac_uint64 totalSamplesInFrame = pFlac->currentFrame.header.blockSize * channelCount; - drflac_uint64 samplesReadFromFrameSoFar = totalSamplesInFrame - pFlac->currentFrame.samplesRemaining; - drflac_uint64 misalignedSampleCount = samplesReadFromFrameSoFar % channelCount; - drflac_uint64 alignedSampleCountPerChannel; - drflac_uint64 firstAlignedSampleInFrame; - unsigned int unusedBitsPerSample; - drflac_uint64 alignedSamplesRead; +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#endif + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s16__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s16__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#endif + } +} - if (misalignedSampleCount > 0) { - drflac_uint64 misalignedSamplesRead = drflac__read_s32__misaligned(pFlac, misalignedSampleCount, bufferOut); - samplesRead += misalignedSamplesRead; - samplesReadFromFrameSoFar += misalignedSamplesRead; - bufferOut += misalignedSamplesRead; - samplesToRead -= misalignedSamplesRead; - pFlac->currentSample += misalignedSamplesRead; - } +#if 0 +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + for (drflac_uint64 i = 0; i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) >> 16); + } +} +#endif - alignedSampleCountPerChannel = samplesToRead / channelCount; - if (alignedSampleCountPerChannel > pFlac->currentFrame.samplesRemaining / channelCount) { - alignedSampleCountPerChannel = pFlac->currentFrame.samplesRemaining / channelCount; - } +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - firstAlignedSampleInFrame = samplesReadFromFrameSoFar / channelCount; - unusedBitsPerSample = 32 - pFlac->bitsPerSample; + for (i = 0; i < frameCount4; ++i) { + drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; + + tempL0 >>= 16; + tempL1 >>= 16; + tempL2 >>= 16; + tempL3 >>= 16; + + tempR0 >>= 16; + tempR1 >>= 16; + tempR2 >>= 16; + tempR3 >>= 16; + + pOutputSamples[i*8+0] = (drflac_int16)tempL0; + pOutputSamples[i*8+1] = (drflac_int16)tempR0; + pOutputSamples[i*8+2] = (drflac_int16)tempL1; + pOutputSamples[i*8+3] = (drflac_int16)tempR1; + pOutputSamples[i*8+4] = (drflac_int16)tempL2; + pOutputSamples[i*8+5] = (drflac_int16)tempR2; + pOutputSamples[i*8+6] = (drflac_int16)tempL3; + pOutputSamples[i*8+7] = (drflac_int16)tempR3; + } - switch (pFlac->currentFrame.header.channelAssignment) - { - case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: - { - drflac_uint64 i; - const drflac_int32* pDecodedSamples0 = pFlac->currentFrame.subframes[0].pDecodedSamples + firstAlignedSampleInFrame; - const drflac_int32* pDecodedSamples1 = pFlac->currentFrame.subframes[1].pDecodedSamples + firstAlignedSampleInFrame; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); + } +} - for (i = 0; i < alignedSampleCountPerChannel; ++i) { - int left = (int)((drflac_uint32)pDecodedSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample)); - int side = (int)((drflac_uint32)pDecodedSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample)); - int right = left - side; +#if defined(DRFLAC_SUPPORT_SSE2) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - bufferOut[i*2+0] = left; - bufferOut[i*2+1] = right; - } - } break; + for (i = 0; i < frameCount4; ++i) { + __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); - case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: - { - drflac_uint64 i; - const drflac_int32* pDecodedSamples0 = pFlac->currentFrame.subframes[0].pDecodedSamples + firstAlignedSampleInFrame; - const drflac_int32* pDecodedSamples1 = pFlac->currentFrame.subframes[1].pDecodedSamples + firstAlignedSampleInFrame; + left = _mm_srai_epi32(left, 16); + right = _mm_srai_epi32(right, 16); - for (i = 0; i < alignedSampleCountPerChannel; ++i) { - int side = (int)((drflac_uint32)pDecodedSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample)); - int right = (int)((drflac_uint32)pDecodedSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample)); - int left = right + side; + /* At this point we have results. We can now pack and interleave these into a single __m128i object and then store the in the output buffer. */ + _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); + } - bufferOut[i*2+0] = left; - bufferOut[i*2+1] = right; - } - } break; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); + } +} +#endif - case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: - { - drflac_uint64 i; - const drflac_int32* pDecodedSamples0 = pFlac->currentFrame.subframes[0].pDecodedSamples + firstAlignedSampleInFrame; - const drflac_int32* pDecodedSamples1 = pFlac->currentFrame.subframes[1].pDecodedSamples + firstAlignedSampleInFrame; - - for (i = 0; i < alignedSampleCountPerChannel; ++i) { - int mid = (int)((drflac_uint32)pDecodedSamples0[i] << pFlac->currentFrame.subframes[0].wastedBitsPerSample); - int side = (int)((drflac_uint32)pDecodedSamples1[i] << pFlac->currentFrame.subframes[1].wastedBitsPerSample); - - mid = (((drflac_uint32)mid) << 1) | (side & 0x01); - - bufferOut[i*2+0] = (drflac_int32)((drflac_uint32)((mid + side) >> 1) << (unusedBitsPerSample)); - bufferOut[i*2+1] = (drflac_int32)((drflac_uint32)((mid - side) >> 1) << (unusedBitsPerSample)); - } - } break; +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: - default: - { - if (pFlac->currentFrame.header.channelAssignment == 1) /* 1 = Stereo */ - { - /* Stereo optimized inner loop unroll. */ - drflac_uint64 i; - const drflac_int32* pDecodedSamples0 = pFlac->currentFrame.subframes[0].pDecodedSamples + firstAlignedSampleInFrame; - const drflac_int32* pDecodedSamples1 = pFlac->currentFrame.subframes[1].pDecodedSamples + firstAlignedSampleInFrame; - - for (i = 0; i < alignedSampleCountPerChannel; ++i) { - bufferOut[i*2+0] = (drflac_int32)((drflac_uint32)pDecodedSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample)); - bufferOut[i*2+1] = (drflac_int32)((drflac_uint32)pDecodedSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample)); - } - } - else - { - /* Generic interleaving. */ - drflac_uint64 i; - for (i = 0; i < alignedSampleCountPerChannel; ++i) { - unsigned int j; - for (j = 0; j < channelCount; ++j) { - bufferOut[(i*channelCount)+j] = (drflac_int32)((drflac_uint32)(pFlac->currentFrame.subframes[j].pDecodedSamples[firstAlignedSampleInFrame + i]) << (unusedBitsPerSample + pFlac->currentFrame.subframes[j].wastedBitsPerSample)); - } - } - } - } break; - } + int32x4_t shift0_4 = vdupq_n_s32(shift0); + int32x4_t shift1_4 = vdupq_n_s32(shift1); - alignedSamplesRead = alignedSampleCountPerChannel * channelCount; - samplesRead += alignedSamplesRead; - samplesReadFromFrameSoFar += alignedSamplesRead; - bufferOut += alignedSamplesRead; - samplesToRead -= alignedSamplesRead; - pFlac->currentSample += alignedSamplesRead; - pFlac->currentFrame.samplesRemaining -= (unsigned int)alignedSamplesRead; + for (i = 0; i < frameCount4; ++i) { + int32x4_t left; + int32x4_t right; + left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); + right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); - /* At this point we may still have some excess samples left to read. */ - if (samplesToRead > 0 && pFlac->currentFrame.samplesRemaining > 0) { - drflac_uint64 excessSamplesRead = 0; - if (samplesToRead < pFlac->currentFrame.samplesRemaining) { - excessSamplesRead = drflac__read_s32__misaligned(pFlac, samplesToRead, bufferOut); - } else { - excessSamplesRead = drflac__read_s32__misaligned(pFlac, pFlac->currentFrame.samplesRemaining, bufferOut); - } + left = vshrq_n_s32(left, 16); + right = vshrq_n_s32(right, 16); - samplesRead += excessSamplesRead; - samplesReadFromFrameSoFar += excessSamplesRead; - bufferOut += excessSamplesRead; - samplesToRead -= excessSamplesRead; - pFlac->currentSample += excessSamplesRead; - } - } + drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); } - return samplesRead; + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); + pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); + } } +#endif -drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut) +static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) { -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(push) - #pragma warning(disable:4996) /* was declared deprecated */ -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic push - #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#if defined(DRFLAC_SUPPORT_SSE2) + if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_s16__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif - return drflac_read_s32(pFlac, framesToRead*pFlac->channels, pBufferOut) / pFlac->channels; -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(pop) -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic pop + { + /* Scalar fallback. */ +#if 0 + drflac_read_pcm_frames_s16__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); +#else + drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); #endif + } } - -drflac_uint64 drflac_read_s16(drflac* pFlac, drflac_uint64 samplesToRead, drflac_int16* pBufferOut) +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut) { - /* This reads samples in 2 passes and can probably be optimized. */ - drflac_uint64 totalSamplesRead = 0; - -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(push) - #pragma warning(disable:4996) /* was declared deprecated */ -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic push - #pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#endif - - while (samplesToRead > 0) { - drflac_uint64 i; - drflac_int32 samples32[4096]; - drflac_uint64 samplesJustRead = drflac_read_s32(pFlac, (samplesToRead > 4096) ? 4096 : samplesToRead, samples32); - if (samplesJustRead == 0) { - break; /* Reached the end. */ - } - - /* s32 -> s16 */ - for (i = 0; i < samplesJustRead; ++i) { - pBufferOut[i] = (drflac_int16)(samples32[i] >> 16); - } + drflac_uint64 framesRead; + drflac_uint32 unusedBitsPerSample; - totalSamplesRead += samplesJustRead; - samplesToRead -= samplesJustRead; - pBufferOut += samplesJustRead; + if (pFlac == NULL || framesToRead == 0) { + return 0; } -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(pop) -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic pop -#endif - - return totalSamplesRead; -} + if (pBufferOut == NULL) { + return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); + } -drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut) -{ - /* This reads samples in 2 passes and can probably be optimized. */ - drflac_uint64 totalPCMFramesRead = 0; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); + unusedBitsPerSample = 32 - pFlac->bitsPerSample; + framesRead = 0; while (framesToRead > 0) { - drflac_uint64 iFrame; - drflac_int32 samples32[4096]; - drflac_uint64 framesJustRead = drflac_read_pcm_frames_s32(pFlac, (framesToRead > 4096/pFlac->channels) ? 4096/pFlac->channels : framesToRead, samples32); - if (framesJustRead == 0) { - break; /* Reached the end. */ - } - - /* s32 -> s16 */ - for (iFrame = 0; iFrame < framesJustRead; ++iFrame) { - drflac_uint32 iChannel; - for (iChannel = 0; iChannel < pFlac->channels; ++iChannel) { - drflac_uint64 iSample = iFrame*pFlac->channels + iChannel; - pBufferOut[iSample] = (drflac_int16)(samples32[iSample] >> 16); + /* If we've run out of samples in this frame, go to the next. */ + if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { + if (!drflac__read_and_decode_next_flac_frame(pFlac)) { + break; /* Couldn't read the next frame, so just break from the loop and return. */ } - } + } else { + unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); + drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; + drflac_uint64 frameCountThisIteration = framesToRead; - totalPCMFramesRead += framesJustRead; - framesToRead -= framesJustRead; - pBufferOut += framesJustRead * pFlac->channels; - } + if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { + frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; + } - return totalPCMFramesRead; -} + if (channelCount == 2) { + const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; + const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; + switch (pFlac->currentFLACFrame.header.channelAssignment) + { + case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: + { + drflac_read_pcm_frames_s16__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; -drflac_uint64 drflac_read_f32(drflac* pFlac, drflac_uint64 samplesToRead, float* pBufferOut) -{ - /* This reads samples in 2 passes and can probably be optimized. */ - drflac_uint64 totalSamplesRead = 0; + case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: + { + drflac_read_pcm_frames_s16__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(push) - #pragma warning(disable:4996) /* was declared deprecated */ -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic push - #pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#endif + case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: + { + drflac_read_pcm_frames_s16__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; - while (samplesToRead > 0) { - drflac_uint64 i; - drflac_int32 samples32[4096]; - drflac_uint64 samplesJustRead = drflac_read_s32(pFlac, (samplesToRead > 4096) ? 4096 : samplesToRead, samples32); - if (samplesJustRead == 0) { - break; /* Reached the end. */ - } + case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: + default: + { + drflac_read_pcm_frames_s16__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); + } break; + } + } else { + /* Generic interleaving. */ + drflac_uint64 i; + for (i = 0; i < frameCountThisIteration; ++i) { + unsigned int j; + for (j = 0; j < channelCount; ++j) { + drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); + pBufferOut[(i*channelCount)+j] = (drflac_int16)(sampleS32 >> 16); + } + } + } - /* s32 -> f32 */ - for (i = 0; i < samplesJustRead; ++i) { - pBufferOut[i] = (float)(samples32[i] / 2147483648.0); + framesRead += frameCountThisIteration; + pBufferOut += frameCountThisIteration * channelCount; + framesToRead -= frameCountThisIteration; + pFlac->currentPCMFrame += frameCountThisIteration; + pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; } - - totalSamplesRead += samplesJustRead; - samplesToRead -= samplesJustRead; - pBufferOut += samplesJustRead; } -#if defined(_MSC_VER) && !defined(__clang__) - #pragma warning(pop) -#elif defined(__GNUC__) || defined(__clang__) - #pragma GCC diagnostic pop -#endif - - return totalSamplesRead; + return framesRead; } + #if 0 -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; for (i = 0; i < frameCount; ++i) { - int left = pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample); - int side = pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample); - int right = left - side; + drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 right = left - side; - pOutputSamples[i*2+0] = (float)(left / 2147483648.0); - pOutputSamples[i*2+1] = (float)(right / 2147483648.0); + pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); + pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; float factor = 1 / 2147483648.0; - drflac_int32 shift0 = unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample; - drflac_int32 shift1 = unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample; for (i = 0; i < frameCount4; ++i) { - drflac_int32 left0 = pInputSamples0[i*4+0] << shift0; - drflac_int32 left1 = pInputSamples0[i*4+1] << shift0; - drflac_int32 left2 = pInputSamples0[i*4+2] << shift0; - drflac_int32 left3 = pInputSamples0[i*4+3] << shift0; - - drflac_int32 side0 = pInputSamples1[i*4+0] << shift1; - drflac_int32 side1 = pInputSamples1[i*4+1] << shift1; - drflac_int32 side2 = pInputSamples1[i*4+2] << shift1; - drflac_int32 side3 = pInputSamples1[i*4+3] << shift1; - - drflac_int32 right0 = left0 - side0; - drflac_int32 right1 = left1 - side1; - drflac_int32 right2 = left2 - side2; - drflac_int32 right3 = left3 - side3; - - pOutputSamples[i*8+0] = left0 * factor; - pOutputSamples[i*8+1] = right0 * factor; - pOutputSamples[i*8+2] = left1 * factor; - pOutputSamples[i*8+3] = right1 * factor; - pOutputSamples[i*8+4] = left2 * factor; - pOutputSamples[i*8+5] = right2 * factor; - pOutputSamples[i*8+6] = left3 * factor; - pOutputSamples[i*8+7] = right3 * factor; + drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 right0 = left0 - side0; + drflac_uint32 right1 = left1 - side1; + drflac_uint32 right2 = left2 - side2; + drflac_uint32 right3 = left3 - side3; + + pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; + pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; + pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; + pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; + pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; + pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; + pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; + pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int left = pInputSamples0[i] << shift0; - int side = pInputSamples1[i] << shift1; - int right = left - side; + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - pOutputSamples[i*2+0] = (float)(left * factor); - pOutputSamples[i*2+1] = (float)(right * factor); + pOutputSamples[i*2+0] = (drflac_int32)left * factor; + pOutputSamples[i*2+1] = (drflac_int32)right * factor; } } #if defined(DRFLAC_SUPPORT_SSE2) -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { - drflac_uint64 frameCount4; - __m128 factor; - int shift0; - int shift1; drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; + __m128 factor; - drflac_assert(pFlac->bitsPerSample <= 24); - - frameCount4 = frameCount >> 2; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); factor = _mm_set1_ps(1.0f / 8388608.0f); - shift0 = (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample) - 8; - shift1 = (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample) - 8; for (i = 0; i < frameCount4; ++i) { - __m128i inputSample0 = _mm_loadu_si128((const __m128i*)pInputSamples0 + i); - __m128i inputSample1 = _mm_loadu_si128((const __m128i*)pInputSamples1 + i); - - __m128i left = _mm_slli_epi32(inputSample0, shift0); - __m128i side = _mm_slli_epi32(inputSample1, shift1); + __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); __m128i right = _mm_sub_epi32(left, side); __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); - pOutputSamples[i*8+0] = ((float*)&leftf)[0]; - pOutputSamples[i*8+1] = ((float*)&rightf)[0]; - pOutputSamples[i*8+2] = ((float*)&leftf)[1]; - pOutputSamples[i*8+3] = ((float*)&rightf)[1]; - pOutputSamples[i*8+4] = ((float*)&leftf)[2]; - pOutputSamples[i*8+5] = ((float*)&rightf)[2]; - pOutputSamples[i*8+6] = ((float*)&leftf)[3]; - pOutputSamples[i*8+7] = ((float*)&rightf)[3]; + _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); + _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; + + pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; + pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; + } +} +#endif + +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; + float32x4_t factor4; + int32x4_t shift0_4; + int32x4_t shift1_4; + + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); + + factor4 = vdupq_n_f32(1.0f / 8388608.0f); + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); + + for (i = 0; i < frameCount4; ++i) { + uint32x4_t left; + uint32x4_t side; + uint32x4_t right; + float32x4_t leftf; + float32x4_t rightf; + + left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + right = vsubq_u32(left, side); + leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); + rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); + + drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int left = pInputSamples0[i] << shift0; - int side = pInputSamples1[i] << shift1; - int right = left - side; + drflac_uint32 left = pInputSamples0U32[i] << shift0; + drflac_uint32 side = pInputSamples1U32[i] << shift1; + drflac_uint32 right = left - side; - pOutputSamples[i*2+0] = (float)(left / 8388608.0f); - pOutputSamples[i*2+1] = (float)(right / 8388608.0f); + pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; + pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { #if defined(DRFLAC_SUPPORT_SSE2) if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { drflac_read_pcm_frames_f32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_f32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif { /* Scalar fallback. */ @@ -7255,119 +10645,159 @@ static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side(drflac* p #if 0 -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; for (i = 0; i < frameCount; ++i) { - int side = pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample); - int right = pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample); - int left = right + side; + drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + drflac_uint32 left = right + side; - pOutputSamples[i*2+0] = (float)(left / 2147483648.0); - pOutputSamples[i*2+1] = (float)(right / 2147483648.0); + pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); + pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; drflac_uint64 frameCount4 = frameCount >> 2; - + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; float factor = 1 / 2147483648.0; - drflac_int32 shift0 = unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample; - drflac_int32 shift1 = unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample; for (i = 0; i < frameCount4; ++i) { - drflac_int32 side0 = pInputSamples0[i*4+0] << shift0; - drflac_int32 side1 = pInputSamples0[i*4+1] << shift0; - drflac_int32 side2 = pInputSamples0[i*4+2] << shift0; - drflac_int32 side3 = pInputSamples0[i*4+3] << shift0; - - drflac_int32 right0 = pInputSamples1[i*4+0] << shift1; - drflac_int32 right1 = pInputSamples1[i*4+1] << shift1; - drflac_int32 right2 = pInputSamples1[i*4+2] << shift1; - drflac_int32 right3 = pInputSamples1[i*4+3] << shift1; - - drflac_int32 left0 = right0 + side0; - drflac_int32 left1 = right1 + side1; - drflac_int32 left2 = right2 + side2; - drflac_int32 left3 = right3 + side3; - - pOutputSamples[i*8+0] = left0 * factor; - pOutputSamples[i*8+1] = right0 * factor; - pOutputSamples[i*8+2] = left1 * factor; - pOutputSamples[i*8+3] = right1 * factor; - pOutputSamples[i*8+4] = left2 * factor; - pOutputSamples[i*8+5] = right2 * factor; - pOutputSamples[i*8+6] = left3 * factor; - pOutputSamples[i*8+7] = right3 * factor; + drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; + + drflac_uint32 left0 = right0 + side0; + drflac_uint32 left1 = right1 + side1; + drflac_uint32 left2 = right2 + side2; + drflac_uint32 left3 = right3 + side3; + + pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; + pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; + pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; + pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; + pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; + pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; + pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; + pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int side = pInputSamples0[i] << shift0; - int right = pInputSamples1[i] << shift1; - int left = right + side; + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; - pOutputSamples[i*2+0] = (float)(left * factor); - pOutputSamples[i*2+1] = (float)(right * factor); + pOutputSamples[i*2+0] = (drflac_int32)left * factor; + pOutputSamples[i*2+1] = (drflac_int32)right * factor; } } #if defined(DRFLAC_SUPPORT_SSE2) -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { - drflac_uint64 frameCount4; - __m128 factor; - int shift0; - int shift1; drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; + __m128 factor; - drflac_assert(pFlac->bitsPerSample <= 24); - - frameCount4 = frameCount >> 2; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); factor = _mm_set1_ps(1.0f / 8388608.0f); - shift0 = (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample) - 8; - shift1 = (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample) - 8; for (i = 0; i < frameCount4; ++i) { - __m128i inputSample0 = _mm_loadu_si128((const __m128i*)pInputSamples0 + i); - __m128i inputSample1 = _mm_loadu_si128((const __m128i*)pInputSamples1 + i); - - __m128i side = _mm_slli_epi32(inputSample0, shift0); - __m128i right = _mm_slli_epi32(inputSample1, shift1); + __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); __m128i left = _mm_add_epi32(right, side); __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); - pOutputSamples[i*8+0] = ((float*)&leftf)[0]; - pOutputSamples[i*8+1] = ((float*)&rightf)[0]; - pOutputSamples[i*8+2] = ((float*)&leftf)[1]; - pOutputSamples[i*8+3] = ((float*)&rightf)[1]; - pOutputSamples[i*8+4] = ((float*)&leftf)[2]; - pOutputSamples[i*8+5] = ((float*)&rightf)[2]; - pOutputSamples[i*8+6] = ((float*)&leftf)[3]; - pOutputSamples[i*8+7] = ((float*)&rightf)[3]; + _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); + _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; + + pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; + pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; + } +} +#endif + +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; + float32x4_t factor4; + int32x4_t shift0_4; + int32x4_t shift1_4; + + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); + + factor4 = vdupq_n_f32(1.0f / 8388608.0f); + shift0_4 = vdupq_n_s32(shift0); + shift1_4 = vdupq_n_s32(shift1); + + for (i = 0; i < frameCount4; ++i) { + uint32x4_t side; + uint32x4_t right; + uint32x4_t left; + float32x4_t leftf; + float32x4_t rightf; + + side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); + right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); + left = vaddq_u32(right, side); + leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); + rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); + + drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int side = pInputSamples0[i] << shift0; - int right = pInputSamples1[i] << shift1; - int left = right + side; + drflac_uint32 side = pInputSamples0U32[i] << shift0; + drflac_uint32 right = pInputSamples1U32[i] << shift1; + drflac_uint32 left = right + side; - pOutputSamples[i*2+0] = (float)(left / 8388608.0f); - pOutputSamples[i*2+1] = (float)(right / 8388608.0f); + pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; + pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { #if defined(DRFLAC_SUPPORT_SSE2) if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { drflac_read_pcm_frames_f32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_f32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif { /* Scalar fallback. */ @@ -7381,197 +10811,185 @@ static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side(drflac* #if 0 -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { for (drflac_uint64 i = 0; i < frameCount; ++i) { - int mid = pInputSamples0[i] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int side = pInputSamples1[i] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid = (((drflac_uint32)mid) << 1) | (side & 0x01); + drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - pOutputSamples[i*2+0] = (float)((((mid + side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); - pOutputSamples[i*2+1] = (float)((((mid - side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (float)((((drflac_int32)(mid + side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); + pOutputSamples[i*2+1] = (float)((((drflac_int32)(mid - side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; drflac_uint64 frameCount4 = frameCount >> 2; - + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample; float factor = 1 / 2147483648.0; - int shift = unusedBitsPerSample; if (shift > 0) { shift -= 1; for (i = 0; i < frameCount4; ++i) { - int temp0L; - int temp1L; - int temp2L; - int temp3L; - int temp0R; - int temp1R; - int temp2R; - int temp3R; - - int mid0 = pInputSamples0[i*4+0] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid1 = pInputSamples0[i*4+1] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid2 = pInputSamples0[i*4+2] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid3 = pInputSamples0[i*4+3] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - - int side0 = pInputSamples1[i*4+0] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side1 = pInputSamples1[i*4+1] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side2 = pInputSamples1[i*4+2] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side3 = pInputSamples1[i*4+3] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid0 = (((drflac_uint32)mid0) << 1) | (side0 & 0x01); - mid1 = (((drflac_uint32)mid1) << 1) | (side1 & 0x01); - mid2 = (((drflac_uint32)mid2) << 1) | (side2 & 0x01); - mid3 = (((drflac_uint32)mid3) << 1) | (side3 & 0x01); - - temp0L = ((mid0 + side0) << shift); - temp1L = ((mid1 + side1) << shift); - temp2L = ((mid2 + side2) << shift); - temp3L = ((mid3 + side3) << shift); - - temp0R = ((mid0 - side0) << shift); - temp1R = ((mid1 - side1) << shift); - temp2R = ((mid2 - side2) << shift); - temp3R = ((mid3 - side3) << shift); - - pOutputSamples[i*8+0] = (float)(temp0L * factor); - pOutputSamples[i*8+1] = (float)(temp0R * factor); - pOutputSamples[i*8+2] = (float)(temp1L * factor); - pOutputSamples[i*8+3] = (float)(temp1R * factor); - pOutputSamples[i*8+4] = (float)(temp2L * factor); - pOutputSamples[i*8+5] = (float)(temp2R * factor); - pOutputSamples[i*8+6] = (float)(temp3L * factor); - pOutputSamples[i*8+7] = (float)(temp3R * factor); + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = (mid0 + side0) << shift; + temp1L = (mid1 + side1) << shift; + temp2L = (mid2 + side2) << shift; + temp3L = (mid3 + side3) << shift; + + temp0R = (mid0 - side0) << shift; + temp1R = (mid1 - side1) << shift; + temp2R = (mid2 - side2) << shift; + temp3R = (mid3 - side3) << shift; + + pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; + pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; + pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; + pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; + pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; + pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; + pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; + pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; } } else { for (i = 0; i < frameCount4; ++i) { - int temp0L; - int temp1L; - int temp2L; - int temp3L; - int temp0R; - int temp1R; - int temp2R; - int temp3R; - - int mid0 = pInputSamples0[i*4+0] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid1 = pInputSamples0[i*4+1] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid2 = pInputSamples0[i*4+2] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int mid3 = pInputSamples0[i*4+3] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - - int side0 = pInputSamples1[i*4+0] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side1 = pInputSamples1[i*4+1] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side2 = pInputSamples1[i*4+2] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - int side3 = pInputSamples1[i*4+3] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid0 = (((drflac_uint32)mid0) << 1) | (side0 & 0x01); - mid1 = (((drflac_uint32)mid1) << 1) | (side1 & 0x01); - mid2 = (((drflac_uint32)mid2) << 1) | (side2 & 0x01); - mid3 = (((drflac_uint32)mid3) << 1) | (side3 & 0x01); - - temp0L = ((mid0 + side0) >> 1); - temp1L = ((mid1 + side1) >> 1); - temp2L = ((mid2 + side2) >> 1); - temp3L = ((mid3 + side3) >> 1); - - temp0R = ((mid0 - side0) >> 1); - temp1R = ((mid1 - side1) >> 1); - temp2R = ((mid2 - side2) >> 1); - temp3R = ((mid3 - side3) >> 1); - - pOutputSamples[i*8+0] = (float)(temp0L * factor); - pOutputSamples[i*8+1] = (float)(temp0R * factor); - pOutputSamples[i*8+2] = (float)(temp1L * factor); - pOutputSamples[i*8+3] = (float)(temp1R * factor); - pOutputSamples[i*8+4] = (float)(temp2L * factor); - pOutputSamples[i*8+5] = (float)(temp2R * factor); - pOutputSamples[i*8+6] = (float)(temp3L * factor); - pOutputSamples[i*8+7] = (float)(temp3R * factor); + drflac_uint32 temp0L; + drflac_uint32 temp1L; + drflac_uint32 temp2L; + drflac_uint32 temp3L; + drflac_uint32 temp0R; + drflac_uint32 temp1R; + drflac_uint32 temp2R; + drflac_uint32 temp3R; + + drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + + drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid0 = (mid0 << 1) | (side0 & 0x01); + mid1 = (mid1 << 1) | (side1 & 0x01); + mid2 = (mid2 << 1) | (side2 & 0x01); + mid3 = (mid3 << 1) | (side3 & 0x01); + + temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); + temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); + temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); + temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); + + temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); + temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); + temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); + temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); + + pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; + pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; + pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; + pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; + pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; + pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; + pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; + pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; } } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int mid = pInputSamples0[i] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int side = pInputSamples1[i] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid = (((drflac_uint32)mid) << 1) | (side & 0x01); + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - pOutputSamples[i*2+0] = (float)((((mid + side) >> 1) << unusedBitsPerSample) * factor); - pOutputSamples[i*2+1] = (float)((((mid - side) >> 1) << unusedBitsPerSample) * factor); + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) * factor; + pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) * factor; } } #if defined(DRFLAC_SUPPORT_SSE2) -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; - drflac_uint64 frameCount4; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample - 8; float factor; - int shift; __m128 factor128; - drflac_assert(pFlac->bitsPerSample <= 24); - - frameCount4 = frameCount >> 2; + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); factor = 1.0f / 8388608.0f; - factor128 = _mm_set1_ps(1.0f / 8388608.0f); + factor128 = _mm_set1_ps(factor); - shift = unusedBitsPerSample - 8; if (shift == 0) { for (i = 0; i < frameCount4; ++i) { + __m128i mid; + __m128i side; __m128i tempL; __m128i tempR; __m128 leftf; __m128 rightf; - __m128i inputSample0 = _mm_loadu_si128((const __m128i*)pInputSamples0 + i); - __m128i inputSample1 = _mm_loadu_si128((const __m128i*)pInputSamples1 + i); - - __m128i mid = _mm_slli_epi32(inputSample0, pFlac->currentFrame.subframes[0].wastedBitsPerSample); - __m128i side = _mm_slli_epi32(inputSample1, pFlac->currentFrame.subframes[1].wastedBitsPerSample); + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); - tempL = _mm_add_epi32(mid, side); - tempR = _mm_sub_epi32(mid, side); - - /* Signed bit shift. */ - tempL = _mm_or_si128(_mm_srli_epi32(tempL, 1), _mm_and_si128(tempL, _mm_set1_epi32(0x80000000))); - tempR = _mm_or_si128(_mm_srli_epi32(tempR, 1), _mm_and_si128(tempR, _mm_set1_epi32(0x80000000))); + tempL = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); + tempR = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); - pOutputSamples[i*8+0] = ((float*)&leftf)[0]; - pOutputSamples[i*8+1] = ((float*)&rightf)[0]; - pOutputSamples[i*8+2] = ((float*)&leftf)[1]; - pOutputSamples[i*8+3] = ((float*)&rightf)[1]; - pOutputSamples[i*8+4] = ((float*)&leftf)[2]; - pOutputSamples[i*8+5] = ((float*)&rightf)[2]; - pOutputSamples[i*8+6] = ((float*)&leftf)[3]; - pOutputSamples[i*8+7] = ((float*)&rightf)[3]; + _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); + _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int mid = pInputSamples0[i] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int side = pInputSamples1[i] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid = (((drflac_uint32)mid) << 1) | (side & 0x01); + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); - pOutputSamples[i*2+0] = (float)(((mid + side) >> 1) * factor); - pOutputSamples[i*2+1] = (float)(((mid - side) >> 1) * factor); + pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; + pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; } } else { + shift -= 1; for (i = 0; i < frameCount4; ++i) { - __m128i inputSample0; - __m128i inputSample1; __m128i mid; __m128i side; __m128i tempL; @@ -7579,50 +10997,133 @@ static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__sse2(drfl __m128 leftf; __m128 rightf; - inputSample0 = _mm_loadu_si128((const __m128i*)pInputSamples0 + i); - inputSample1 = _mm_loadu_si128((const __m128i*)pInputSamples1 + i); - - mid = _mm_slli_epi32(inputSample0, pFlac->currentFrame.subframes[0].wastedBitsPerSample); - side = _mm_slli_epi32(inputSample1, pFlac->currentFrame.subframes[1].wastedBitsPerSample); + mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); - mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); + mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); - tempL = _mm_slli_epi32(_mm_srli_epi32(_mm_add_epi32(mid, side), 1), shift); - tempR = _mm_slli_epi32(_mm_srli_epi32(_mm_sub_epi32(mid, side), 1), shift); + tempL = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); + tempR = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); - pOutputSamples[i*8+0] = ((float*)&leftf)[0]; - pOutputSamples[i*8+1] = ((float*)&rightf)[0]; - pOutputSamples[i*8+2] = ((float*)&leftf)[1]; - pOutputSamples[i*8+3] = ((float*)&rightf)[1]; - pOutputSamples[i*8+4] = ((float*)&leftf)[2]; - pOutputSamples[i*8+5] = ((float*)&rightf)[2]; - pOutputSamples[i*8+6] = ((float*)&leftf)[3]; - pOutputSamples[i*8+7] = ((float*)&rightf)[3]; + _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); + _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); } for (i = (frameCount4 << 2); i < frameCount; ++i) { - int mid = pInputSamples0[i] << pFlac->currentFrame.subframes[0].wastedBitsPerSample; - int side = pInputSamples1[i] << pFlac->currentFrame.subframes[1].wastedBitsPerSample; - - mid = (((drflac_uint32)mid) << 1) | (side & 0x01); + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; - pOutputSamples[i*2+0] = (float)((((mid + side) >> 1) << shift) * factor); - pOutputSamples[i*2+1] = (float)((((mid - side) >> 1) << shift) * factor); + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; + pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; } } } #endif +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift = unusedBitsPerSample - 8; + float factor; + float32x4_t factor4; + int32x4_t shift4; + int32x4_t wbps0_4; /* Wasted Bits Per Sample */ + int32x4_t wbps1_4; /* Wasted Bits Per Sample */ + + DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); + + factor = 1.0f / 8388608.0f; + factor4 = vdupq_n_f32(factor); + wbps0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); + wbps1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); + + if (shift == 0) { + for (i = 0; i < frameCount4; ++i) { + int32x4_t lefti; + int32x4_t righti; + float32x4_t leftf; + float32x4_t rightf; + + uint32x4_t mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); + uint32x4_t side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); + + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); + + lefti = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); + righti = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); + + leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); + rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) + drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; + pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; + } + } else { + shift -= 1; + shift4 = vdupq_n_s32(shift); + for (i = 0; i < frameCount4; ++i) { + uint32x4_t mid; + uint32x4_t side; + int32x4_t lefti; + int32x4_t righti; + float32x4_t leftf; + float32x4_t rightf; + + mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); + side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); + + mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); + + lefti = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); + righti = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); + + leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); + rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); + + drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; + + mid = (mid << 1) | (side & 0x01); + + pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; + pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; + } + } +} +#endif + +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { #if defined(DRFLAC_SUPPORT_SSE2) if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { drflac_read_pcm_frames_f32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_f32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif { /* Scalar fallback. */ @@ -7635,97 +11136,135 @@ static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side(drflac* pF } #if 0 -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { for (drflac_uint64 i = 0; i < frameCount; ++i) { - pOutputSamples[i*2+0] = (float)((pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample)) / 2147483648.0); - pOutputSamples[i*2+1] = (float)((pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample)) / 2147483648.0); + pOutputSamples[i*2+0] = (float)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) / 2147483648.0); + pOutputSamples[i*2+1] = (float)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) / 2147483648.0); } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; drflac_uint64 frameCount4 = frameCount >> 2; - + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; + drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; float factor = 1 / 2147483648.0; - int shift0 = (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample); - int shift1 = (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample); - for (i = 0; i < frameCount4; ++i) { - int tempL0 = pInputSamples0[i*4+0] << shift0; - int tempL1 = pInputSamples0[i*4+1] << shift0; - int tempL2 = pInputSamples0[i*4+2] << shift0; - int tempL3 = pInputSamples0[i*4+3] << shift0; - - int tempR0 = pInputSamples1[i*4+0] << shift1; - int tempR1 = pInputSamples1[i*4+1] << shift1; - int tempR2 = pInputSamples1[i*4+2] << shift1; - int tempR3 = pInputSamples1[i*4+3] << shift1; - - pOutputSamples[i*8+0] = (float)(tempL0 * factor); - pOutputSamples[i*8+1] = (float)(tempR0 * factor); - pOutputSamples[i*8+2] = (float)(tempL1 * factor); - pOutputSamples[i*8+3] = (float)(tempR1 * factor); - pOutputSamples[i*8+4] = (float)(tempL2 * factor); - pOutputSamples[i*8+5] = (float)(tempR2 * factor); - pOutputSamples[i*8+6] = (float)(tempL3 * factor); - pOutputSamples[i*8+7] = (float)(tempR3 * factor); + drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; + drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; + drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; + drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; + + drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; + drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; + drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; + drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; + + pOutputSamples[i*8+0] = (drflac_int32)tempL0 * factor; + pOutputSamples[i*8+1] = (drflac_int32)tempR0 * factor; + pOutputSamples[i*8+2] = (drflac_int32)tempL1 * factor; + pOutputSamples[i*8+3] = (drflac_int32)tempR1 * factor; + pOutputSamples[i*8+4] = (drflac_int32)tempL2 * factor; + pOutputSamples[i*8+5] = (drflac_int32)tempR2 * factor; + pOutputSamples[i*8+6] = (drflac_int32)tempL3 * factor; + pOutputSamples[i*8+7] = (drflac_int32)tempR3 * factor; } for (i = (frameCount4 << 2); i < frameCount; ++i) { - pOutputSamples[i*2+0] = (float)((pInputSamples0[i] << shift0) * factor); - pOutputSamples[i*2+1] = (float)((pInputSamples1[i] << shift1) * factor); + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; } } #if defined(DRFLAC_SUPPORT_SSE2) -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { drflac_uint64 i; drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; float factor = 1.0f / 8388608.0f; - __m128 factor128 = _mm_set1_ps(1.0f / 8388608.0f); + __m128 factor128 = _mm_set1_ps(factor); + + for (i = 0; i < frameCount4; ++i) { + __m128i lefti; + __m128i righti; + __m128 leftf; + __m128 rightf; + + lefti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); + righti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); + + leftf = _mm_mul_ps(_mm_cvtepi32_ps(lefti), factor128); + rightf = _mm_mul_ps(_mm_cvtepi32_ps(righti), factor128); + + _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); + _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); + } + + for (i = (frameCount4 << 2); i < frameCount; ++i) { + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; + } +} +#endif + +#if defined(DRFLAC_SUPPORT_NEON) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +{ + drflac_uint64 i; + drflac_uint64 frameCount4 = frameCount >> 2; + const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; + const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; + drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; + drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; - int shift0 = (unusedBitsPerSample + pFlac->currentFrame.subframes[0].wastedBitsPerSample) - 8; - int shift1 = (unusedBitsPerSample + pFlac->currentFrame.subframes[1].wastedBitsPerSample) - 8; + float factor = 1.0f / 8388608.0f; + float32x4_t factor4 = vdupq_n_f32(factor); + int32x4_t shift0_4 = vdupq_n_s32(shift0); + int32x4_t shift1_4 = vdupq_n_s32(shift1); for (i = 0; i < frameCount4; ++i) { - __m128i inputSample0 = _mm_loadu_si128((const __m128i*)pInputSamples0 + i); - __m128i inputSample1 = _mm_loadu_si128((const __m128i*)pInputSamples1 + i); + int32x4_t lefti; + int32x4_t righti; + float32x4_t leftf; + float32x4_t rightf; - __m128i i32L = _mm_slli_epi32(inputSample0, shift0); - __m128i i32R = _mm_slli_epi32(inputSample1, shift1); + lefti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); + righti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); - __m128 f32L = _mm_mul_ps(_mm_cvtepi32_ps(i32L), factor128); - __m128 f32R = _mm_mul_ps(_mm_cvtepi32_ps(i32R), factor128); + leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); + rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); - pOutputSamples[i*8+0] = ((float*)&f32L)[0]; - pOutputSamples[i*8+1] = ((float*)&f32R)[0]; - pOutputSamples[i*8+2] = ((float*)&f32L)[1]; - pOutputSamples[i*8+3] = ((float*)&f32R)[1]; - pOutputSamples[i*8+4] = ((float*)&f32L)[2]; - pOutputSamples[i*8+5] = ((float*)&f32R)[2]; - pOutputSamples[i*8+6] = ((float*)&f32L)[3]; - pOutputSamples[i*8+7] = ((float*)&f32R)[3]; + drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); } for (i = (frameCount4 << 2); i < frameCount; ++i) { - pOutputSamples[i*2+0] = (float)((pInputSamples0[i] << shift0) * factor); - pOutputSamples[i*2+1] = (float)((pInputSamples1[i] << shift1) * factor); + pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; + pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; } } #endif -static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_int32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) +static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) { #if defined(DRFLAC_SUPPORT_SSE2) if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); } else +#elif defined(DRFLAC_SUPPORT_NEON) + if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { + drflac_read_pcm_frames_f32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); + } else #endif { /* Scalar fallback. */ @@ -7737,9 +11276,10 @@ static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo( } } -drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut) +DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut) { drflac_uint64 framesRead; + drflac_uint32 unusedBitsPerSample; if (pFlac == NULL || framesToRead == 0) { return 0; @@ -7749,31 +11289,30 @@ drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRe return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); } + DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); + unusedBitsPerSample = 32 - pFlac->bitsPerSample; + framesRead = 0; while (framesToRead > 0) { /* If we've run out of samples in this frame, go to the next. */ - if (pFlac->currentFrame.samplesRemaining == 0) { + if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { if (!drflac__read_and_decode_next_flac_frame(pFlac)) { break; /* Couldn't read the next frame, so just break from the loop and return. */ } } else { - unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - drflac_uint64 totalFramesInPacket = pFlac->currentFrame.header.blockSize; - drflac_uint64 framesReadFromPacketSoFar = totalFramesInPacket - (pFlac->currentFrame.samplesRemaining/channelCount); - drflac_uint64 iFirstPCMFrame = framesReadFromPacketSoFar; - drflac_int32 unusedBitsPerSample = 32 - pFlac->bitsPerSample; + unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); + drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; drflac_uint64 frameCountThisIteration = framesToRead; - drflac_uint64 samplesReadThisIteration; - if (frameCountThisIteration > pFlac->currentFrame.samplesRemaining / channelCount) { - frameCountThisIteration = pFlac->currentFrame.samplesRemaining / channelCount; + if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { + frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; } if (channelCount == 2) { - const drflac_int32* pDecodedSamples0 = pFlac->currentFrame.subframes[0].pDecodedSamples + iFirstPCMFrame; - const drflac_int32* pDecodedSamples1 = pFlac->currentFrame.subframes[1].pDecodedSamples + iFirstPCMFrame; + const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; + const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; - switch (pFlac->currentFrame.header.channelAssignment) + switch (pFlac->currentFLACFrame.header.channelAssignment) { case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: { @@ -7784,7 +11323,7 @@ drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRe { drflac_read_pcm_frames_f32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); } break; - + case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: { drflac_read_pcm_frames_f32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); @@ -7802,66 +11341,72 @@ drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRe for (i = 0; i < frameCountThisIteration; ++i) { unsigned int j; for (j = 0; j < channelCount; ++j) { - pBufferOut[(i*channelCount)+j] = (float)(((pFlac->currentFrame.subframes[j].pDecodedSamples[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFrame.subframes[j].wastedBitsPerSample)) / 2147483648.0); + drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); + pBufferOut[(i*channelCount)+j] = (float)(sampleS32 / 2147483648.0); } } } - samplesReadThisIteration = frameCountThisIteration * channelCount; framesRead += frameCountThisIteration; - framesReadFromPacketSoFar += frameCountThisIteration; - pBufferOut += samplesReadThisIteration; + pBufferOut += frameCountThisIteration * channelCount; framesToRead -= frameCountThisIteration; - pFlac->currentSample += samplesReadThisIteration; - pFlac->currentFrame.samplesRemaining -= (unsigned int)samplesReadThisIteration; + pFlac->currentPCMFrame += frameCountThisIteration; + pFlac->currentFLACFrame.pcmFramesRemaining -= (unsigned int)frameCountThisIteration; } } return framesRead; } -drflac_bool32 drflac_seek_to_sample(drflac* pFlac, drflac_uint64 sampleIndex) + +DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) { if (pFlac == NULL) { return DRFLAC_FALSE; } + /* Don't do anything if we're already on the seek point. */ + if (pFlac->currentPCMFrame == pcmFrameIndex) { + return DRFLAC_TRUE; + } + /* If we don't know where the first frame begins then we can't seek. This will happen when the STREAMINFO block was not present when the decoder was opened. */ - if (pFlac->firstFramePos == 0) { + if (pFlac->firstFLACFramePosInBytes == 0) { return DRFLAC_FALSE; } - if (sampleIndex == 0) { - pFlac->currentSample = 0; + if (pcmFrameIndex == 0) { + pFlac->currentPCMFrame = 0; return drflac__seek_to_first_frame(pFlac); } else { drflac_bool32 wasSuccessful = DRFLAC_FALSE; + drflac_uint64 originalPCMFrame = pFlac->currentPCMFrame; /* Clamp the sample to the end. */ - if (sampleIndex >= pFlac->totalSampleCount) { - sampleIndex = pFlac->totalSampleCount - 1; + if (pcmFrameIndex > pFlac->totalPCMFrameCount) { + pcmFrameIndex = pFlac->totalPCMFrameCount; } /* If the target sample and the current sample are in the same frame we just move the position forward. */ - if (sampleIndex > pFlac->currentSample) { + if (pcmFrameIndex > pFlac->currentPCMFrame) { /* Forward. */ - drflac_uint32 offset = (drflac_uint32)(sampleIndex - pFlac->currentSample); - if (pFlac->currentFrame.samplesRemaining > offset) { - pFlac->currentFrame.samplesRemaining -= offset; - pFlac->currentSample = sampleIndex; + drflac_uint32 offset = (drflac_uint32)(pcmFrameIndex - pFlac->currentPCMFrame); + if (pFlac->currentFLACFrame.pcmFramesRemaining > offset) { + pFlac->currentFLACFrame.pcmFramesRemaining -= offset; + pFlac->currentPCMFrame = pcmFrameIndex; return DRFLAC_TRUE; } } else { /* Backward. */ - drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentSample - sampleIndex); - drflac_uint32 currentFrameSampleCount = pFlac->currentFrame.header.blockSize * drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - drflac_uint32 currentFrameSamplesConsumed = (drflac_uint32)(currentFrameSampleCount - pFlac->currentFrame.samplesRemaining); - if (currentFrameSamplesConsumed > offsetAbs) { - pFlac->currentFrame.samplesRemaining += offsetAbs; - pFlac->currentSample = sampleIndex; + drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentPCMFrame - pcmFrameIndex); + drflac_uint32 currentFLACFramePCMFrameCount = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; + drflac_uint32 currentFLACFramePCMFramesConsumed = currentFLACFramePCMFrameCount - pFlac->currentFLACFrame.pcmFramesRemaining; + if (currentFLACFramePCMFramesConsumed > offsetAbs) { + pFlac->currentFLACFrame.pcmFramesRemaining += offsetAbs; + pFlac->currentPCMFrame = pcmFrameIndex; return DRFLAC_TRUE; } } @@ -7873,89 +11418,39 @@ drflac_bool32 drflac_seek_to_sample(drflac* pFlac, drflac_uint64 sampleIndex) #ifndef DR_FLAC_NO_OGG if (pFlac->container == drflac_container_ogg) { - wasSuccessful = drflac_ogg__seek_to_sample(pFlac, sampleIndex); + wasSuccessful = drflac_ogg__seek_to_pcm_frame(pFlac, pcmFrameIndex); } else #endif { /* First try seeking via the seek table. If this fails, fall back to a brute force seek which is much slower. */ - wasSuccessful = drflac__seek_to_sample__seek_table(pFlac, sampleIndex); - if (!wasSuccessful) { - wasSuccessful = drflac__seek_to_sample__brute_force(pFlac, sampleIndex); + if (/*!wasSuccessful && */!pFlac->_noSeekTableSeek) { + wasSuccessful = drflac__seek_to_pcm_frame__seek_table(pFlac, pcmFrameIndex); } - } - - pFlac->currentSample = sampleIndex; - return wasSuccessful; - } -} - -drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) -{ - if (pFlac == NULL) { - return DRFLAC_FALSE; - } - - /* - If we don't know where the first frame begins then we can't seek. This will happen when the STREAMINFO block was not present - when the decoder was opened. - */ - if (pFlac->firstFramePos == 0) { - return DRFLAC_FALSE; - } - - if (pcmFrameIndex == 0) { - pFlac->currentSample = 0; - return drflac__seek_to_first_frame(pFlac); - } else { - drflac_bool32 wasSuccessful = DRFLAC_FALSE; - - /* Clamp the sample to the end. */ - if (pcmFrameIndex >= pFlac->totalPCMFrameCount) { - pcmFrameIndex = pFlac->totalPCMFrameCount - 1; - } - /* If the target sample and the current sample are in the same frame we just move the position forward. */ - if (pcmFrameIndex*pFlac->channels > pFlac->currentSample) { - /* Forward. */ - drflac_uint32 offset = (drflac_uint32)(pcmFrameIndex*pFlac->channels - pFlac->currentSample); - if (pFlac->currentFrame.samplesRemaining > offset) { - pFlac->currentFrame.samplesRemaining -= offset; - pFlac->currentSample = pcmFrameIndex*pFlac->channels; - return DRFLAC_TRUE; - } - } else { - /* Backward. */ - drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentSample - pcmFrameIndex*pFlac->channels); - drflac_uint32 currentFrameSampleCount = pFlac->currentFrame.header.blockSize * drflac__get_channel_count_from_channel_assignment(pFlac->currentFrame.header.channelAssignment); - drflac_uint32 currentFrameSamplesConsumed = (drflac_uint32)(currentFrameSampleCount - pFlac->currentFrame.samplesRemaining); - if (currentFrameSamplesConsumed > offsetAbs) { - pFlac->currentFrame.samplesRemaining += offsetAbs; - pFlac->currentSample = pcmFrameIndex*pFlac->channels; - return DRFLAC_TRUE; +#if !defined(DR_FLAC_NO_CRC) + /* Fall back to binary search if seek table seeking fails. This requires the length of the stream to be known. */ + if (!wasSuccessful && !pFlac->_noBinarySearchSeek && pFlac->totalPCMFrameCount > 0) { + wasSuccessful = drflac__seek_to_pcm_frame__binary_search(pFlac, pcmFrameIndex); } - } - - /* - Different techniques depending on encapsulation. Using the native FLAC seektable with Ogg encapsulation is a bit awkward so - we'll instead use Ogg's natural seeking facility. - */ -#ifndef DR_FLAC_NO_OGG - if (pFlac->container == drflac_container_ogg) - { - wasSuccessful = drflac_ogg__seek_to_sample(pFlac, pcmFrameIndex*pFlac->channels); - } - else #endif - { - /* First try seeking via the seek table. If this fails, fall back to a brute force seek which is much slower. */ - wasSuccessful = drflac__seek_to_sample__seek_table(pFlac, pcmFrameIndex*pFlac->channels); - if (!wasSuccessful) { - wasSuccessful = drflac__seek_to_sample__brute_force(pFlac, pcmFrameIndex*pFlac->channels); + + /* Fall back to brute force if all else fails. */ + if (!wasSuccessful && !pFlac->_noBruteForceSeek) { + wasSuccessful = drflac__seek_to_pcm_frame__brute_force(pFlac, pcmFrameIndex); + } + } + + if (wasSuccessful) { + pFlac->currentPCMFrame = pcmFrameIndex; + } else { + /* Seek failed. Try putting the decoder back to it's original state. */ + if (drflac_seek_to_pcm_frame(pFlac, originalPCMFrame) == DRFLAC_FALSE) { + /* Failed to seek back to the original PCM frame. Fall back to 0. */ + drflac_seek_to_pcm_frame(pFlac, 0); } } - pFlac->currentSample = pcmFrameIndex*pFlac->channels; return wasSuccessful; } } @@ -7982,7 +11477,7 @@ static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned type* pSampleData = NULL; \ drflac_uint64 totalPCMFrameCount; \ \ - drflac_assert(pFlac != NULL); \ + DRFLAC_ASSERT(pFlac != NULL); \ \ totalPCMFrameCount = pFlac->totalPCMFrameCount; \ \ @@ -7991,7 +11486,7 @@ static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned drflac_uint64 pcmFramesRead; \ size_t sampleDataBufferSize = sizeof(buffer); \ \ - pSampleData = (type*)DRFLAC_MALLOC(sampleDataBufferSize); \ + pSampleData = (type*)drflac__malloc_from_callbacks(sampleDataBufferSize, &pFlac->allocationCallbacks); \ if (pSampleData == NULL) { \ goto on_error; \ } \ @@ -7999,31 +11494,33 @@ static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned while ((pcmFramesRead = (drflac_uint64)drflac_read_pcm_frames_##extension(pFlac, sizeof(buffer)/sizeof(buffer[0])/pFlac->channels, buffer)) > 0) { \ if (((totalPCMFrameCount + pcmFramesRead) * pFlac->channels * sizeof(type)) > sampleDataBufferSize) { \ type* pNewSampleData; \ + size_t newSampleDataBufferSize; \ \ - sampleDataBufferSize *= 2; \ - pNewSampleData = (type*)DRFLAC_REALLOC(pSampleData, sampleDataBufferSize); \ + newSampleDataBufferSize = sampleDataBufferSize * 2; \ + pNewSampleData = (type*)drflac__realloc_from_callbacks(pSampleData, newSampleDataBufferSize, sampleDataBufferSize, &pFlac->allocationCallbacks); \ if (pNewSampleData == NULL) { \ - DRFLAC_FREE(pSampleData); \ + drflac__free_from_callbacks(pSampleData, &pFlac->allocationCallbacks); \ goto on_error; \ } \ \ + sampleDataBufferSize = newSampleDataBufferSize; \ pSampleData = pNewSampleData; \ } \ \ - drflac_copy_memory(pSampleData + (totalPCMFrameCount*pFlac->channels), buffer, (size_t)(pcmFramesRead*pFlac->channels*sizeof(type))); \ + DRFLAC_COPY_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), buffer, (size_t)(pcmFramesRead*pFlac->channels*sizeof(type))); \ totalPCMFrameCount += pcmFramesRead; \ } \ \ /* At this point everything should be decoded, but we just want to fill the unused part buffer with silence - need to \ protect those ears from random noise! */ \ - drflac_zero_memory(pSampleData + (totalPCMFrameCount*pFlac->channels), (size_t)(sampleDataBufferSize - totalPCMFrameCount*pFlac->channels*sizeof(type))); \ + DRFLAC_ZERO_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), (size_t)(sampleDataBufferSize - totalPCMFrameCount*pFlac->channels*sizeof(type))); \ } else { \ drflac_uint64 dataSize = totalPCMFrameCount*pFlac->channels*sizeof(type); \ if (dataSize > DRFLAC_SIZE_MAX) { \ goto on_error; /* The decoded data is too big. */ \ } \ \ - pSampleData = (type*)DRFLAC_MALLOC((size_t)dataSize); /* <-- Safe cast as per the check above. */ \ + pSampleData = (type*)drflac__malloc_from_callbacks((size_t)dataSize, &pFlac->allocationCallbacks); /* <-- Safe cast as per the check above. */ \ if (pSampleData == NULL) { \ goto on_error; \ } \ @@ -8047,7 +11544,7 @@ DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s32, drflac_int32) DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s16, drflac_int16) DRFLAC_DEFINE_FULL_READ_AND_CLOSE(f32, float) -drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut) +DRFLAC_API drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8061,7 +11558,7 @@ drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drfla *totalPCMFrameCountOut = 0; } - pFlac = drflac_open(onRead, onSeek, pUserData); + pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8069,44 +11566,7 @@ drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drfla return drflac__full_read_and_close_s32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); } -drflac_int32* drflac_open_and_decode_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int32* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_and_read_pcm_frames_s32(onRead, onSeek, pUserData, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - - -drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut) +DRFLAC_API drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8120,7 +11580,7 @@ drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drfla *totalPCMFrameCountOut = 0; } - pFlac = drflac_open(onRead, onSeek, pUserData); + pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8128,43 +11588,7 @@ drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drfla return drflac__full_read_and_close_s16(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); } -drflac_int16* drflac_open_and_decode_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int16* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_and_read_pcm_frames_s16(onRead, onSeek, pUserData, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - -float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut) +DRFLAC_API float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8178,7 +11602,7 @@ float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_ *totalPCMFrameCountOut = 0; } - pFlac = drflac_open(onRead, onSeek, pUserData); + pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8186,43 +11610,8 @@ float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_ return drflac__full_read_and_close_f32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); } -float* drflac_open_and_decode_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - float* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_and_read_pcm_frames_f32(onRead, onSeek, pUserData, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - #ifndef DR_FLAC_NO_STDIO -drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8236,7 +11625,7 @@ drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, uns *totalPCMFrameCount = 0; } - pFlac = drflac_open_file(filename); + pFlac = drflac_open_file(filename, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8244,43 +11633,7 @@ drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, uns return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); } -drflac_int32* drflac_open_and_decode_file_s32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int32* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_file_and_read_pcm_frames_s32(filename, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - -drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8294,7 +11647,7 @@ drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, uns *totalPCMFrameCount = 0; } - pFlac = drflac_open_file(filename); + pFlac = drflac_open_file(filename, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8302,43 +11655,7 @@ drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, uns return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); } -drflac_int16* drflac_open_and_decode_file_s16(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int16* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_file_and_read_pcm_frames_s16(filename, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - -float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8352,51 +11669,16 @@ float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned i *totalPCMFrameCount = 0; } - pFlac = drflac_open_file(filename); + pFlac = drflac_open_file(filename, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); } - -float* drflac_open_and_decode_file_f32(const char* filename, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - float* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_file_and_read_pcm_frames_f32(filename, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} #endif -drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8410,7 +11692,7 @@ drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_ *totalPCMFrameCount = 0; } - pFlac = drflac_open_memory(data, dataSize); + pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8418,43 +11700,7 @@ drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_ return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); } -drflac_int32* drflac_open_and_decode_memory_s32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int32* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_memory_and_read_pcm_frames_s32(data, dataSize, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - -drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8468,7 +11714,7 @@ drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_ *totalPCMFrameCount = 0; } - pFlac = drflac_open_memory(data, dataSize); + pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8476,43 +11722,7 @@ drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_ return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); } -drflac_int16* drflac_open_and_decode_memory_s16(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - drflac_int16* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_memory_and_read_pcm_frames_s16(data, dataSize, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - - -float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount) +DRFLAC_API float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) { drflac* pFlac; @@ -8526,7 +11736,7 @@ float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataS *totalPCMFrameCount = 0; } - pFlac = drflac_open_memory(data, dataSize); + pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); if (pFlac == NULL) { return NULL; } @@ -8534,51 +11744,20 @@ float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataS return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); } -float* drflac_open_and_decode_memory_f32(const void* data, size_t dataSize, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalSampleCountOut) -{ - unsigned int channels; - unsigned int sampleRate; - drflac_uint64 totalPCMFrameCount; - float* pResult; - - if (channelsOut) { - *channelsOut = 0; - } - if (sampleRateOut) { - *sampleRateOut = 0; - } - if (totalSampleCountOut) { - *totalSampleCountOut = 0; - } - - pResult = drflac_open_memory_and_read_pcm_frames_f32(data, dataSize, &channels, &sampleRate, &totalPCMFrameCount); - if (pResult == NULL) { - return NULL; - } - - if (channelsOut) { - *channelsOut = channels; - } - if (sampleRateOut) { - *sampleRateOut = sampleRate; - } - if (totalSampleCountOut) { - *totalSampleCountOut = totalPCMFrameCount * channels; - } - - return pResult; -} - -void drflac_free(void* pSampleDataReturnedByOpenAndDecode) +DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) { - DRFLAC_FREE(pSampleDataReturnedByOpenAndDecode); + if (pAllocationCallbacks != NULL) { + drflac__free_from_callbacks(p, pAllocationCallbacks); + } else { + drflac__free_default(p, NULL); + } } -void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments) +DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments) { if (pIter == NULL) { return; @@ -8588,11 +11767,11 @@ void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, pIter->pRunningData = (const char*)pComments; } -const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut) +DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut) { drflac_int32 length; const char* pComment; - + /* Safety. */ if (pCommentLengthOut) { *pCommentLengthOut = 0; @@ -8619,7 +11798,7 @@ const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, dr -void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData) +DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData) { if (pIter == NULL) { return; @@ -8629,7 +11808,7 @@ void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, pIter->pRunningData = (const char*)pTrackData; } -drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack) +DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack) { drflac_cuesheet_track cuesheetTrack; const char* pRunningData; @@ -8646,7 +11825,7 @@ drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, offsetLo = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; cuesheetTrack.offset = offsetLo | (offsetHi << 32); cuesheetTrack.trackNumber = pRunningData[0]; pRunningData += 1; - drflac_copy_memory(cuesheetTrack.ISRC, pRunningData, sizeof(cuesheetTrack.ISRC)); pRunningData += 12; + DRFLAC_COPY_MEMORY(cuesheetTrack.ISRC, pRunningData, sizeof(cuesheetTrack.ISRC)); pRunningData += 12; cuesheetTrack.isAudio = (pRunningData[0] & 0x80) != 0; cuesheetTrack.preEmphasis = (pRunningData[0] & 0x40) != 0; pRunningData += 14; cuesheetTrack.indexCount = pRunningData[0]; pRunningData += 1; @@ -8662,15 +11841,166 @@ drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, return DRFLAC_TRUE; } -#if defined(__GNUC__) +#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) #pragma GCC diagnostic pop #endif +#endif /* dr_flac_c */ #endif /* DR_FLAC_IMPLEMENTATION */ /* REVISION HISTORY ================ +v0.12.29 - 2021-04-02 + - Fix a bug where the running PCM frame index is set to an invalid value when over-seeking. + - Fix a decoding error due to an incorrect validation check. + +v0.12.28 - 2021-02-21 + - Fix a warning due to referencing _MSC_VER when it is undefined. + +v0.12.27 - 2021-01-31 + - Fix a static analysis warning. + +v0.12.26 - 2021-01-17 + - Fix a compilation warning due to _BSD_SOURCE being deprecated. + +v0.12.25 - 2020-12-26 + - Update documentation. + +v0.12.24 - 2020-11-29 + - Fix ARM64/NEON detection when compiling with MSVC. + +v0.12.23 - 2020-11-21 + - Fix compilation with OpenWatcom. + +v0.12.22 - 2020-11-01 + - Fix an error with the previous release. + +v0.12.21 - 2020-11-01 + - Fix a possible deadlock when seeking. + - Improve compiler support for older versions of GCC. + +v0.12.20 - 2020-09-08 + - Fix a compilation error on older compilers. + +v0.12.19 - 2020-08-30 + - Fix a bug due to an undefined 32-bit shift. + +v0.12.18 - 2020-08-14 + - Fix a crash when compiling with clang-cl. + +v0.12.17 - 2020-08-02 + - Simplify sized types. + +v0.12.16 - 2020-07-25 + - Fix a compilation warning. + +v0.12.15 - 2020-07-06 + - Check for negative LPC shifts and return an error. + +v0.12.14 - 2020-06-23 + - Add include guard for the implementation section. + +v0.12.13 - 2020-05-16 + - Add compile-time and run-time version querying. + - DRFLAC_VERSION_MINOR + - DRFLAC_VERSION_MAJOR + - DRFLAC_VERSION_REVISION + - DRFLAC_VERSION_STRING + - drflac_version() + - drflac_version_string() + +v0.12.12 - 2020-04-30 + - Fix compilation errors with VC6. + +v0.12.11 - 2020-04-19 + - Fix some pedantic warnings. + - Fix some undefined behaviour warnings. + +v0.12.10 - 2020-04-10 + - Fix some bugs when trying to seek with an invalid seek table. + +v0.12.9 - 2020-04-05 + - Fix warnings. + +v0.12.8 - 2020-04-04 + - Add drflac_open_file_w() and drflac_open_file_with_metadata_w(). + - Fix some static analysis warnings. + - Minor documentation updates. + +v0.12.7 - 2020-03-14 + - Fix compilation errors with VC6. + +v0.12.6 - 2020-03-07 + - Fix compilation error with Visual Studio .NET 2003. + +v0.12.5 - 2020-01-30 + - Silence some static analysis warnings. + +v0.12.4 - 2020-01-29 + - Silence some static analysis warnings. + +v0.12.3 - 2019-12-02 + - Fix some warnings when compiling with GCC and the -Og flag. + - Fix a crash in out-of-memory situations. + - Fix potential integer overflow bug. + - Fix some static analysis warnings. + - Fix a possible crash when using custom memory allocators without a custom realloc() implementation. + - Fix a bug with binary search seeking where the bits per sample is not a multiple of 8. + +v0.12.2 - 2019-10-07 + - Internal code clean up. + +v0.12.1 - 2019-09-29 + - Fix some Clang Static Analyzer warnings. + - Fix an unused variable warning. + +v0.12.0 - 2019-09-23 + - API CHANGE: Add support for user defined memory allocation routines. This system allows the program to specify their own memory allocation + routines with a user data pointer for client-specific contextual data. This adds an extra parameter to the end of the following APIs: + - drflac_open() + - drflac_open_relaxed() + - drflac_open_with_metadata() + - drflac_open_with_metadata_relaxed() + - drflac_open_file() + - drflac_open_file_with_metadata() + - drflac_open_memory() + - drflac_open_memory_with_metadata() + - drflac_open_and_read_pcm_frames_s32() + - drflac_open_and_read_pcm_frames_s16() + - drflac_open_and_read_pcm_frames_f32() + - drflac_open_file_and_read_pcm_frames_s32() + - drflac_open_file_and_read_pcm_frames_s16() + - drflac_open_file_and_read_pcm_frames_f32() + - drflac_open_memory_and_read_pcm_frames_s32() + - drflac_open_memory_and_read_pcm_frames_s16() + - drflac_open_memory_and_read_pcm_frames_f32() + Set this extra parameter to NULL to use defaults which is the same as the previous behaviour. Setting this NULL will use + DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. + - Remove deprecated APIs: + - drflac_read_s32() + - drflac_read_s16() + - drflac_read_f32() + - drflac_seek_to_sample() + - drflac_open_and_decode_s32() + - drflac_open_and_decode_s16() + - drflac_open_and_decode_f32() + - drflac_open_and_decode_file_s32() + - drflac_open_and_decode_file_s16() + - drflac_open_and_decode_file_f32() + - drflac_open_and_decode_memory_s32() + - drflac_open_and_decode_memory_s16() + - drflac_open_and_decode_memory_f32() + - Remove drflac.totalSampleCount which is now replaced with drflac.totalPCMFrameCount. You can emulate drflac.totalSampleCount + by doing pFlac->totalPCMFrameCount*pFlac->channels. + - Rename drflac.currentFrame to drflac.currentFLACFrame to remove ambiguity with PCM frames. + - Fix errors when seeking to the end of a stream. + - Optimizations to seeking. + - SSE improvements and optimizations. + - ARM NEON optimizations. + - Optimizations to drflac_read_pcm_frames_s16(). + - Optimizations to drflac_read_pcm_frames_s32(). + v0.11.10 - 2019-06-26 - Fix a compiler error. @@ -8689,7 +12019,7 @@ v0.11.6 - 2019-05-05 - Change license to choice of public domain or MIT-0. v0.11.5 - 2019-04-19 - - Fix a compiler error with GCC. + - Fix a compiler error with GCC. v0.11.4 - 2019-04-17 - Fix some warnings with GCC when compiling with -std=c99. @@ -8704,7 +12034,7 @@ v0.11.1 - 2019-02-17 - Fix a potential bug with seeking. v0.11.0 - 2018-12-16 - - API CHANGE: Deprecated drflac_read_s32(), drflac_read_s16() and drflac_read_f32() and replaced them with + - API CHANGE: Deprecated drflac_read_s32(), drflac_read_s16() and drflac_read_f32() and replaced them with drflac_read_pcm_frames_s32(), drflac_read_pcm_frames_s16() and drflac_read_pcm_frames_f32(). The new APIs take and return PCM frame counts instead of sample counts. To upgrade you will need to change the input count by dividing it by the channel count, and then do the same with the return value. @@ -8914,7 +12244,7 @@ For more information, please refer to =============================================================================== ALTERNATIVE 2 - MIT No Attribution =============================================================================== -Copyright 2018 David Reid +Copyright 2020 David Reid Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in -- cgit v1.2.3