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Diffstat (limited to 'libs/raylib/src/external/jar_xm.h')
| -rw-r--r-- | libs/raylib/src/external/jar_xm.h | 2470 |
1 files changed, 0 insertions, 2470 deletions
diff --git a/libs/raylib/src/external/jar_xm.h b/libs/raylib/src/external/jar_xm.h deleted file mode 100644 index 36d6fb3..0000000 --- a/libs/raylib/src/external/jar_xm.h +++ /dev/null @@ -1,2470 +0,0 @@ -// jar_xm.h -// -// ORIGINAL LICENSE - FOR LIBXM: -// -// Author: Romain "Artefact2" Dalmaso <artefact2@gmail.com> -// Contributor: Dan Spencer <dan@atomicpotato.net> -// Repackaged into jar_xm.h By: Joshua Adam Reisenauer <kd7tck@gmail.com> -// This program is free software. It comes without any warranty, to the -// extent permitted by applicable law. You can redistribute it and/or -// modify it under the terms of the Do What The Fuck You Want To Public -// License, Version 2, as published by Sam Hocevar. See -// http://sam.zoy.org/wtfpl/COPYING for more details. -// -// HISTORY: -// v0.1.0 2016-02-22 jar_xm.h - development by Joshua Reisenauer, MAR 2016 -// v0.2.1 2021-03-07 m4ntr0n1c: Fix clipping noise for "bad" xm's (they will always clip), avoid clip noise and just put a ceiling) -// v0.2.2 2021-03-09 m4ntr0n1c: Add complete debug solution (raylib.h must be included) -// v0.2.3 2021-03-11 m4ntr0n1c: Fix tempo, bpm and volume on song stop / start / restart / loop -// v0.2.4 2021-03-17 m4ntr0n1c: Sanitize code for readability -// v0.2.5 2021-03-22 m4ntr0n1c: Minor adjustments -// v0.2.6 2021-04-01 m4ntr0n1c: Minor fixes and optimisation -// v0.3.0 2021-04-03 m4ntr0n1c: Addition of Stereo sample support, Linear Interpolation and Ramping now addressable options in code -// v0.3.1 2021-04-04 m4ntr0n1c: Volume effects column adjustments, sample offset handling adjustments -// -// USAGE: -// -// In ONE source file, put: -// -// #define JAR_XM_IMPLEMENTATION -// #include "jar_xm.h" -// -// Other source files should just include jar_xm.h -// -// SAMPLE CODE: -// -// jar_xm_context_t *musicptr; -// float musicBuffer[48000 / 60]; -// int intro_load(void) -// { -// jar_xm_create_context_from_file(&musicptr, 48000, "Song.XM"); -// return 1; -// } -// int intro_unload(void) -// { -// jar_xm_free_context(musicptr); -// return 1; -// } -// int intro_tick(long counter) -// { -// jar_xm_generate_samples(musicptr, musicBuffer, (48000 / 60) / 2); -// if(IsKeyDown(KEY_ENTER)) -// return 1; -// return 0; -// } -// -#ifndef INCLUDE_JAR_XM_H -#define INCLUDE_JAR_XM_H - -#include <stdint.h> - -#define JAR_XM_DEBUG 0 -#define JAR_XM_DEFENSIVE 1 -#define JAR_XM_RAYLIB 1 // set to 0 to disable the RayLib visualizer extension - -// Allow custom memory allocators -#ifndef JARXM_MALLOC - #define JARXM_MALLOC(sz) malloc(sz) -#endif -#ifndef JARXM_FREE - #define JARXM_FREE(p) free(p) -#endif - -//------------------------------------------------------------------------------- -struct jar_xm_context_s; -typedef struct jar_xm_context_s jar_xm_context_t; - -#ifdef __cplusplus -extern "C" { -#endif - -//** Create a XM context. -// * @param moddata the contents of the module -// * @param rate play rate in Hz, recommended value of 48000 -// * @returns 0 on success -// * @returns 1 if module data is not sane -// * @returns 2 if memory allocation failed -// * @returns 3 unable to open input file -// * @returns 4 fseek() failed -// * @returns 5 fread() failed -// * @returns 6 unkown error -// * @deprecated This function is unsafe! -// * @see jar_xm_create_context_safe() -int jar_xm_create_context_from_file(jar_xm_context_t** ctx, uint32_t rate, const char* filename); - -//** Create a XM context. -// * @param moddata the contents of the module -// * @param rate play rate in Hz, recommended value of 48000 -// * @returns 0 on success -// * @returns 1 if module data is not sane -// * @returns 2 if memory allocation failed -// * @deprecated This function is unsafe! -// * @see jar_xm_create_context_safe() -int jar_xm_create_context(jar_xm_context_t** ctx, const char* moddata, uint32_t rate); - -//** Create a XM context. -// * @param moddata the contents of the module -// * @param moddata_length the length of the contents of the module, in bytes -// * @param rate play rate in Hz, recommended value of 48000 -// * @returns 0 on success -// * @returns 1 if module data is not sane -// * @returns 2 if memory allocation failed -int jar_xm_create_context_safe(jar_xm_context_t** ctx, const char* moddata, size_t moddata_length, uint32_t rate); - -//** Free a XM context created by jar_xm_create_context(). */ -void jar_xm_free_context(jar_xm_context_t* ctx); - -//** Play the module and put the sound samples in an output buffer. -// * @param output buffer of 2*numsamples elements (A left and right value for each sample) -// * @param numsamples number of samples to generate -void jar_xm_generate_samples(jar_xm_context_t* ctx, float* output, size_t numsamples); - -//** Play the module, resample from float to 16 bit, and put the sound samples in an output buffer. -// * @param output buffer of 2*numsamples elements (A left and right value for each sample) -// * @param numsamples number of samples to generate -void jar_xm_generate_samples_16bit(jar_xm_context_t* ctx, short* output, size_t numsamples) { - float* musicBuffer = JARXM_MALLOC((2*numsamples)*sizeof(float)); - jar_xm_generate_samples(ctx, musicBuffer, numsamples); - - if(output){ - for(int x=0;x<2*numsamples;x++) output[x] = (musicBuffer[x] * 32767.0f); // scale sample to signed small int - } - JARXM_FREE(musicBuffer); -} - -//** Play the module, resample from float to 8 bit, and put the sound samples in an output buffer. -// * @param output buffer of 2*numsamples elements (A left and right value for each sample) -// * @param numsamples number of samples to generate -void jar_xm_generate_samples_8bit(jar_xm_context_t* ctx, char* output, size_t numsamples) { - float* musicBuffer = JARXM_MALLOC((2*numsamples)*sizeof(float)); - jar_xm_generate_samples(ctx, musicBuffer, numsamples); - - if(output){ - for(int x=0;x<2*numsamples;x++) output[x] = (musicBuffer[x] * 127.0f); // scale sample to signed 8 bit - } - JARXM_FREE(musicBuffer); -} - -//** Set the maximum number of times a module can loop. After the specified number of loops, calls to jar_xm_generate_samples will only generate silence. You can control the current number of loops with jar_xm_get_loop_count(). -// * @param loopcnt maximum number of loops. Use 0 to loop indefinitely. -void jar_xm_set_max_loop_count(jar_xm_context_t* ctx, uint8_t loopcnt); - -//** Get the loop count of the currently playing module. This value is 0 when the module is still playing, 1 when the module has looped once, etc. -uint8_t jar_xm_get_loop_count(jar_xm_context_t* ctx); - -//** Mute or unmute a channel. -// * @note Channel numbers go from 1 to jar_xm_get_number_of_channels(...). -// * @return whether the channel was muted. -bool jar_xm_mute_channel(jar_xm_context_t* ctx, uint16_t, bool); - -//** Mute or unmute an instrument. -// * @note Instrument numbers go from 1 to jar_xm_get_number_of_instruments(...). -// * @return whether the instrument was muted. -bool jar_xm_mute_instrument(jar_xm_context_t* ctx, uint16_t, bool); - -//** Get the module name as a NUL-terminated string. -const char* jar_xm_get_module_name(jar_xm_context_t* ctx); - -//** Get the tracker name as a NUL-terminated string. -const char* jar_xm_get_tracker_name(jar_xm_context_t* ctx); - -//** Get the number of channels. -uint16_t jar_xm_get_number_of_channels(jar_xm_context_t* ctx); - -//** Get the module length (in patterns). -uint16_t jar_xm_get_module_length(jar_xm_context_t*); - -//** Get the number of patterns. -uint16_t jar_xm_get_number_of_patterns(jar_xm_context_t* ctx); - -//** Get the number of rows of a pattern. -// * @note Pattern numbers go from 0 to jar_xm_get_number_of_patterns(...)-1. -uint16_t jar_xm_get_number_of_rows(jar_xm_context_t* ctx, uint16_t); - -//** Get the number of instruments. -uint16_t jar_xm_get_number_of_instruments(jar_xm_context_t* ctx); - -//** Get the number of samples of an instrument. -// * @note Instrument numbers go from 1 to jar_xm_get_number_of_instruments(...). -uint16_t jar_xm_get_number_of_samples(jar_xm_context_t* ctx, uint16_t); - -//** Get the current module speed. -// * @param bpm will receive the current BPM -// * @param tempo will receive the current tempo (ticks per line) -void jar_xm_get_playing_speed(jar_xm_context_t* ctx, uint16_t* bpm, uint16_t* tempo); - -//** Get the current position in the module being played. -// * @param pattern_index if not NULL, will receive the current pattern index in the POT (pattern order table) -// * @param pattern if not NULL, will receive the current pattern number -// * @param row if not NULL, will receive the current row -// * @param samples if not NULL, will receive the total number of -// * generated samples (divide by sample rate to get seconds of generated audio) -void jar_xm_get_position(jar_xm_context_t* ctx, uint8_t* pattern_index, uint8_t* pattern, uint8_t* row, uint64_t* samples); - -//** Get the latest time (in number of generated samples) when a particular instrument was triggered in any channel. -// * @note Instrument numbers go from 1 to jar_xm_get_number_of_instruments(...). -uint64_t jar_xm_get_latest_trigger_of_instrument(jar_xm_context_t* ctx, uint16_t); - -//** Get the latest time (in number of generated samples) when a particular sample was triggered in any channel. -// * @note Instrument numbers go from 1 to jar_xm_get_number_of_instruments(...). -// * @note Sample numbers go from 0 to jar_xm_get_nubmer_of_samples(...,instr)-1. -uint64_t jar_xm_get_latest_trigger_of_sample(jar_xm_context_t* ctx, uint16_t instr, uint16_t sample); - -//** Get the latest time (in number of generated samples) when any instrument was triggered in a given channel. -// * @note Channel numbers go from 1 to jar_xm_get_number_of_channels(...). -uint64_t jar_xm_get_latest_trigger_of_channel(jar_xm_context_t* ctx, uint16_t); - -//** Get the number of remaining samples. Divide by 2 to get the number of individual LR data samples. -// * @note This is the remaining number of samples before the loop starts module again, or halts if on last pass. -// * @note This function is very slow and should only be run once, if at all. -uint64_t jar_xm_get_remaining_samples(jar_xm_context_t* ctx); - -#ifdef __cplusplus -} -#endif -//------------------------------------------------------------------------------- - -#ifdef JAR_XM_IMPLEMENTATION - -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <limits.h> -#include <string.h> - -#if JAR_XM_DEBUG //JAR_XM_DEBUG defined as 0 -#include <stdio.h> -#define DEBUG(fmt, ...) do { \ - fprintf(stderr, "%s(): " fmt "\n", __func__, __VA_ARGS__); \ - fflush(stderr); \ - } while(0) -#else -#define DEBUG(...) -#endif - -#if jar_xm_BIG_ENDIAN -#error "Big endian platforms are not yet supported, sorry" -/* Make sure the compiler stops, even if #error is ignored */ -extern int __fail[-1]; -#endif - -/* ----- XM constants ----- */ -#define SAMPLE_NAME_LENGTH 22 -#define INSTRUMENT_NAME_LENGTH 22 -#define MODULE_NAME_LENGTH 20 -#define TRACKER_NAME_LENGTH 20 -#define PATTERN_ORDER_TABLE_LENGTH 256 -#define NUM_NOTES 96 // from 1 to 96, where 1 = C-0 -#define NUM_ENVELOPE_POINTS 12 // to be verified if 12 is the max -#define MAX_NUM_ROWS 256 - -#define jar_xm_SAMPLE_RAMPING_POINTS 8 - -/* ----- Data types ----- */ - -enum jar_xm_waveform_type_e { - jar_xm_SINE_WAVEFORM = 0, - jar_xm_RAMP_DOWN_WAVEFORM = 1, - jar_xm_SQUARE_WAVEFORM = 2, - jar_xm_RANDOM_WAVEFORM = 3, - jar_xm_RAMP_UP_WAVEFORM = 4, -}; -typedef enum jar_xm_waveform_type_e jar_xm_waveform_type_t; - -enum jar_xm_loop_type_e { - jar_xm_NO_LOOP, - jar_xm_FORWARD_LOOP, - jar_xm_PING_PONG_LOOP, -}; -typedef enum jar_xm_loop_type_e jar_xm_loop_type_t; - -enum jar_xm_frequency_type_e { - jar_xm_LINEAR_FREQUENCIES, - jar_xm_AMIGA_FREQUENCIES, -}; -typedef enum jar_xm_frequency_type_e jar_xm_frequency_type_t; - -struct jar_xm_envelope_point_s { - uint16_t frame; - uint16_t value; -}; -typedef struct jar_xm_envelope_point_s jar_xm_envelope_point_t; - -struct jar_xm_envelope_s { - jar_xm_envelope_point_t points[NUM_ENVELOPE_POINTS]; - uint8_t num_points; - uint8_t sustain_point; - uint8_t loop_start_point; - uint8_t loop_end_point; - bool enabled; - bool sustain_enabled; - bool loop_enabled; -}; -typedef struct jar_xm_envelope_s jar_xm_envelope_t; - -struct jar_xm_sample_s { - char name[SAMPLE_NAME_LENGTH + 1]; - int8_t bits; /* Either 8 or 16 */ - int8_t stereo; - uint32_t length; - uint32_t loop_start; - uint32_t loop_length; - uint32_t loop_end; - float volume; - int8_t finetune; - jar_xm_loop_type_t loop_type; - float panning; - int8_t relative_note; - uint64_t latest_trigger; - - float* data; - }; - typedef struct jar_xm_sample_s jar_xm_sample_t; - - struct jar_xm_instrument_s { - char name[INSTRUMENT_NAME_LENGTH + 1]; - uint16_t num_samples; - uint8_t sample_of_notes[NUM_NOTES]; - jar_xm_envelope_t volume_envelope; - jar_xm_envelope_t panning_envelope; - jar_xm_waveform_type_t vibrato_type; - uint8_t vibrato_sweep; - uint8_t vibrato_depth; - uint8_t vibrato_rate; - uint16_t volume_fadeout; - uint64_t latest_trigger; - bool muted; - - jar_xm_sample_t* samples; - }; - typedef struct jar_xm_instrument_s jar_xm_instrument_t; - - struct jar_xm_pattern_slot_s { - uint8_t note; /* 1-96, 97 = Key Off note */ - uint8_t instrument; /* 1-128 */ - uint8_t volume_column; - uint8_t effect_type; - uint8_t effect_param; - }; - typedef struct jar_xm_pattern_slot_s jar_xm_pattern_slot_t; - - struct jar_xm_pattern_s { - uint16_t num_rows; - jar_xm_pattern_slot_t* slots; /* Array of size num_rows * num_channels */ - }; - typedef struct jar_xm_pattern_s jar_xm_pattern_t; - - struct jar_xm_module_s { - char name[MODULE_NAME_LENGTH + 1]; - char trackername[TRACKER_NAME_LENGTH + 1]; - uint16_t length; - uint16_t restart_position; - uint16_t num_channels; - uint16_t num_patterns; - uint16_t num_instruments; - uint16_t linear_interpolation; - uint16_t ramping; - jar_xm_frequency_type_t frequency_type; - uint8_t pattern_table[PATTERN_ORDER_TABLE_LENGTH]; - - jar_xm_pattern_t* patterns; - jar_xm_instrument_t* instruments; /* Instrument 1 has index 0, instrument 2 has index 1, etc. */ - }; - typedef struct jar_xm_module_s jar_xm_module_t; - - struct jar_xm_channel_context_s { - float note; - float orig_note; /* The original note before effect modifications, as read in the pattern. */ - jar_xm_instrument_t* instrument; /* Could be NULL */ - jar_xm_sample_t* sample; /* Could be NULL */ - jar_xm_pattern_slot_t* current; - - float sample_position; - float period; - float frequency; - float step; - bool ping; /* For ping-pong samples: true is -->, false is <-- */ - - float volume; /* Ideally between 0 (muted) and 1 (loudest) */ - float panning; /* Between 0 (left) and 1 (right); 0.5 is centered */ - - uint16_t autovibrato_ticks; - - bool sustained; - float fadeout_volume; - float volume_envelope_volume; - float panning_envelope_panning; - uint16_t volume_envelope_frame_count; - uint16_t panning_envelope_frame_count; - - float autovibrato_note_offset; - - bool arp_in_progress; - uint8_t arp_note_offset; - uint8_t volume_slide_param; - uint8_t fine_volume_slide_param; - uint8_t global_volume_slide_param; - uint8_t panning_slide_param; - uint8_t portamento_up_param; - uint8_t portamento_down_param; - uint8_t fine_portamento_up_param; - uint8_t fine_portamento_down_param; - uint8_t extra_fine_portamento_up_param; - uint8_t extra_fine_portamento_down_param; - uint8_t tone_portamento_param; - float tone_portamento_target_period; - uint8_t multi_retrig_param; - uint8_t note_delay_param; - uint8_t pattern_loop_origin; /* Where to restart a E6y loop */ - uint8_t pattern_loop_count; /* How many loop passes have been done */ - bool vibrato_in_progress; - jar_xm_waveform_type_t vibrato_waveform; - bool vibrato_waveform_retrigger; /* True if a new note retriggers the waveform */ - uint8_t vibrato_param; - uint16_t vibrato_ticks; /* Position in the waveform */ - float vibrato_note_offset; - jar_xm_waveform_type_t tremolo_waveform; - bool tremolo_waveform_retrigger; - uint8_t tremolo_param; - uint8_t tremolo_ticks; - float tremolo_volume; - uint8_t tremor_param; - bool tremor_on; - - uint64_t latest_trigger; - bool muted; - - //* These values are updated at the end of each tick, to save a couple of float operations on every generated sample. - float target_panning; - float target_volume; - - unsigned long frame_count; - float end_of_previous_sample_left[jar_xm_SAMPLE_RAMPING_POINTS]; - float end_of_previous_sample_right[jar_xm_SAMPLE_RAMPING_POINTS]; - float curr_left; - float curr_right; - - float actual_panning; - float actual_volume; - }; - typedef struct jar_xm_channel_context_s jar_xm_channel_context_t; - - struct jar_xm_context_s { - void* allocated_memory; - jar_xm_module_t module; - uint32_t rate; - - uint16_t default_tempo; // Number of ticks per row - uint16_t default_bpm; - float default_global_volume; - - uint16_t tempo; // Number of ticks per row - uint16_t bpm; - float global_volume; - - float volume_ramp; /* How much is a channel final volume allowed to change per sample; this is used to avoid abrubt volume changes which manifest as "clicks" in the generated sound. */ - float panning_ramp; /* Same for panning. */ - - uint8_t current_table_index; - uint8_t current_row; - uint16_t current_tick; /* Can go below 255, with high tempo and a pattern delay */ - float remaining_samples_in_tick; - uint64_t generated_samples; - - bool position_jump; - bool pattern_break; - uint8_t jump_dest; - uint8_t jump_row; - - uint16_t extra_ticks; /* Extra ticks to be played before going to the next row - Used for EEy effect */ - - uint8_t* row_loop_count; /* Array of size MAX_NUM_ROWS * module_length */ - uint8_t loop_count; - uint8_t max_loop_count; - - jar_xm_channel_context_t* channels; -}; - -#if JAR_XM_DEFENSIVE - -//** Check the module data for errors/inconsistencies. -// * @returns 0 if everything looks OK. Module should be safe to load. -int jar_xm_check_sanity_preload(const char*, size_t); - -//** Check a loaded module for errors/inconsistencies. -// * @returns 0 if everything looks OK. -int jar_xm_check_sanity_postload(jar_xm_context_t*); - -#endif - -//** Get the number of bytes needed to store the module data in a dynamically allocated blank context. -// * Things that are dynamically allocated: -// * - sample data -// * - sample structures in instruments -// * - pattern data -// * - row loop count arrays -// * - pattern structures in module -// * - instrument structures in module -// * - channel contexts -// * - context structure itself -// * @returns 0 if everything looks OK. -size_t jar_xm_get_memory_needed_for_context(const char*, size_t); - -//** Populate the context from module data. -// * @returns pointer to the memory pool -char* jar_xm_load_module(jar_xm_context_t*, const char*, size_t, char*); - -int jar_xm_create_context(jar_xm_context_t** ctxp, const char* moddata, uint32_t rate) { - return jar_xm_create_context_safe(ctxp, moddata, SIZE_MAX, rate); -} - -#define ALIGN(x, b) (((x) + ((b) - 1)) & ~((b) - 1)) -#define ALIGN_PTR(x, b) (void*)(((uintptr_t)(x) + ((b) - 1)) & ~((b) - 1)) -int jar_xm_create_context_safe(jar_xm_context_t** ctxp, const char* moddata, size_t moddata_length, uint32_t rate) { -#if JAR_XM_DEFENSIVE - int ret; -#endif - size_t bytes_needed; - char* mempool; - jar_xm_context_t* ctx; - -#if JAR_XM_DEFENSIVE - if((ret = jar_xm_check_sanity_preload(moddata, moddata_length))) { - DEBUG("jar_xm_check_sanity_preload() returned %i, module is not safe to load", ret); - return 1; - } -#endif - - bytes_needed = jar_xm_get_memory_needed_for_context(moddata, moddata_length); - mempool = JARXM_MALLOC(bytes_needed); - if(mempool == NULL && bytes_needed > 0) { /* JARXM_MALLOC() failed, trouble ahead */ - DEBUG("call to JARXM_MALLOC() failed, returned %p", (void*)mempool); - return 2; - } - - /* Initialize most of the fields to 0, 0.f, NULL or false depending on type */ - memset(mempool, 0, bytes_needed); - - ctx = (*ctxp = (jar_xm_context_t *)mempool); - ctx->allocated_memory = mempool; /* Keep original pointer for JARXM_FREE() */ - mempool += sizeof(jar_xm_context_t); - - ctx->rate = rate; - mempool = jar_xm_load_module(ctx, moddata, moddata_length, mempool); - mempool = ALIGN_PTR(mempool, 16); - - ctx->channels = (jar_xm_channel_context_t*)mempool; - mempool += ctx->module.num_channels * sizeof(jar_xm_channel_context_t); - mempool = ALIGN_PTR(mempool, 16); - - ctx->default_global_volume = 1.f; - ctx->global_volume = ctx->default_global_volume; - - ctx->volume_ramp = (1.f / 128.f); - ctx->panning_ramp = (1.f / 128.f); - - for(uint8_t i = 0; i < ctx->module.num_channels; ++i) { - jar_xm_channel_context_t *ch = ctx->channels + i; - ch->ping = true; - ch->vibrato_waveform = jar_xm_SINE_WAVEFORM; - ch->vibrato_waveform_retrigger = true; - ch->tremolo_waveform = jar_xm_SINE_WAVEFORM; - ch->tremolo_waveform_retrigger = true; - ch->volume = ch->volume_envelope_volume = ch->fadeout_volume = 1.0f; - ch->panning = ch->panning_envelope_panning = .5f; - ch->actual_volume = .0f; - ch->actual_panning = .5f; - } - - mempool = ALIGN_PTR(mempool, 16); - ctx->row_loop_count = (uint8_t *)mempool; - mempool += MAX_NUM_ROWS * sizeof(uint8_t); - -#if JAR_XM_DEFENSIVE - if((ret = jar_xm_check_sanity_postload(ctx))) { DEBUG("jar_xm_check_sanity_postload() returned %i, module is not safe to play", ret); - jar_xm_free_context(ctx); - return 1; - } -#endif - - return 0; -} - -void jar_xm_free_context(jar_xm_context_t *ctx) { - if (ctx != NULL) { JARXM_FREE(ctx->allocated_memory); } -} - -void jar_xm_set_max_loop_count(jar_xm_context_t *ctx, uint8_t loopcnt) { - ctx->max_loop_count = loopcnt; -} - -uint8_t jar_xm_get_loop_count(jar_xm_context_t *ctx) { - return ctx->loop_count; -} - -bool jar_xm_mute_channel(jar_xm_context_t *ctx, uint16_t channel, bool mute) { - bool old = ctx->channels[channel - 1].muted; - ctx->channels[channel - 1].muted = mute; - return old; -} - -bool jar_xm_mute_instrument(jar_xm_context_t *ctx, uint16_t instr, bool mute) { - bool old = ctx->module.instruments[instr - 1].muted; - ctx->module.instruments[instr - 1].muted = mute; - return old; -} - -const char* jar_xm_get_module_name(jar_xm_context_t *ctx) { - return ctx->module.name; -} - -const char* jar_xm_get_tracker_name(jar_xm_context_t *ctx) { - return ctx->module.trackername; -} - -uint16_t jar_xm_get_number_of_channels(jar_xm_context_t *ctx) { - return ctx->module.num_channels; -} - -uint16_t jar_xm_get_module_length(jar_xm_context_t *ctx) { - return ctx->module.length; -} - -uint16_t jar_xm_get_number_of_patterns(jar_xm_context_t *ctx) { - return ctx->module.num_patterns; -} - -uint16_t jar_xm_get_number_of_rows(jar_xm_context_t *ctx, uint16_t pattern) { - return ctx->module.patterns[pattern].num_rows; -} - -uint16_t jar_xm_get_number_of_instruments(jar_xm_context_t *ctx) { - return ctx->module.num_instruments; -} - -uint16_t jar_xm_get_number_of_samples(jar_xm_context_t *ctx, uint16_t instrument) { - return ctx->module.instruments[instrument - 1].num_samples; -} - -void jar_xm_get_playing_speed(jar_xm_context_t *ctx, uint16_t *bpm, uint16_t *tempo) { - if(bpm) *bpm = ctx->bpm; - if(tempo) *tempo = ctx->tempo; -} - -void jar_xm_get_position(jar_xm_context_t *ctx, uint8_t *pattern_index, uint8_t *pattern, uint8_t *row, uint64_t *samples) { - if(pattern_index) *pattern_index = ctx->current_table_index; - if(pattern) *pattern = ctx->module.pattern_table[ctx->current_table_index]; - if(row) *row = ctx->current_row; - if(samples) *samples = ctx->generated_samples; -} - -uint64_t jar_xm_get_latest_trigger_of_instrument(jar_xm_context_t *ctx, uint16_t instr) { - return ctx->module.instruments[instr - 1].latest_trigger; -} - -uint64_t jar_xm_get_latest_trigger_of_sample(jar_xm_context_t *ctx, uint16_t instr, uint16_t sample) { - return ctx->module.instruments[instr - 1].samples[sample].latest_trigger; -} - -uint64_t jar_xm_get_latest_trigger_of_channel(jar_xm_context_t *ctx, uint16_t chn) { - return ctx->channels[chn - 1].latest_trigger; -} - -//* .xm files are little-endian. (XXX: Are they really?) - -//* Bound reader macros. -//* If we attempt to read the buffer out-of-bounds, pretend that the buffer is infinitely padded with zeroes. -#define READ_U8(offset) (((offset) < moddata_length) ? (*(uint8_t*)(moddata + (offset))) : 0) -#define READ_U16(offset) ((uint16_t)READ_U8(offset) | ((uint16_t)READ_U8((offset) + 1) << 8)) -#define READ_U32(offset) ((uint32_t)READ_U16(offset) | ((uint32_t)READ_U16((offset) + 2) << 16)) -#define READ_MEMCPY(ptr, offset, length) memcpy_pad(ptr, length, moddata, moddata_length, offset) - -static void memcpy_pad(void *dst, size_t dst_len, const void *src, size_t src_len, size_t offset) { - uint8_t *dst_c = dst; - const uint8_t *src_c = src; - - /* how many bytes can be copied without overrunning `src` */ - size_t copy_bytes = (src_len >= offset) ? (src_len - offset) : 0; - copy_bytes = copy_bytes > dst_len ? dst_len : copy_bytes; - - memcpy(dst_c, src_c + offset, copy_bytes); - /* padded bytes */ - memset(dst_c + copy_bytes, 0, dst_len - copy_bytes); -} - -#if JAR_XM_DEFENSIVE - -int jar_xm_check_sanity_preload(const char* module, size_t module_length) { - if(module_length < 60) { return 4; } - if(memcmp("Extended Module: ", module, 17) != 0) { return 1; } - if(module[37] != 0x1A) { return 2; } - if(module[59] != 0x01 || module[58] != 0x04) { return 3; } /* Not XM 1.04 */ - return 0; -} - -int jar_xm_check_sanity_postload(jar_xm_context_t* ctx) { - /* Check the POT */ - for(uint8_t i = 0; i < ctx->module.length; ++i) { - if(ctx->module.pattern_table[i] >= ctx->module.num_patterns) { - if(i+1 == ctx->module.length && ctx->module.length > 1) { - DEBUG("trimming invalid POT at pos %X", i); - --ctx->module.length; - } else { - DEBUG("module has invalid POT, pos %X references nonexistent pattern %X", i, ctx->module.pattern_table[i]); - return 1; - } - } - } - - return 0; -} - -#endif - -size_t jar_xm_get_memory_needed_for_context(const char* moddata, size_t moddata_length) { - size_t memory_needed = 0; - size_t offset = 60; /* 60 = Skip the first header */ - uint16_t num_channels; - uint16_t num_patterns; - uint16_t num_instruments; - - /* Read the module header */ - num_channels = READ_U16(offset + 8); - num_patterns = READ_U16(offset + 10); - memory_needed += num_patterns * sizeof(jar_xm_pattern_t); - memory_needed = ALIGN(memory_needed, 16); - num_instruments = READ_U16(offset + 12); - memory_needed += num_instruments * sizeof(jar_xm_instrument_t); - memory_needed = ALIGN(memory_needed, 16); - memory_needed += MAX_NUM_ROWS * READ_U16(offset + 4) * sizeof(uint8_t); /* Module length */ - - offset += READ_U32(offset); /* Header size */ - - /* Read pattern headers */ - for(uint16_t i = 0; i < num_patterns; ++i) { - uint16_t num_rows; - num_rows = READ_U16(offset + 5); - memory_needed += num_rows * num_channels * sizeof(jar_xm_pattern_slot_t); - offset += READ_U32(offset) + READ_U16(offset + 7); /* Pattern header length + packed pattern data size */ - } - memory_needed = ALIGN(memory_needed, 16); - - /* Read instrument headers */ - for(uint16_t i = 0; i < num_instruments; ++i) { - uint16_t num_samples; - uint32_t sample_header_size = 0; - uint32_t sample_size_aggregate = 0; - num_samples = READ_U16(offset + 27); - memory_needed += num_samples * sizeof(jar_xm_sample_t); - if(num_samples > 0) { sample_header_size = READ_U32(offset + 29); } - - offset += READ_U32(offset); /* Instrument header size */ - for(uint16_t j = 0; j < num_samples; ++j) { - uint32_t sample_size; - uint8_t flags; - sample_size = READ_U32(offset); - flags = READ_U8(offset + 14); - sample_size_aggregate += sample_size; - - if(flags & (1 << 4)) { /* 16 bit sample */ - memory_needed += sample_size * (sizeof(float) >> 1); - } else { /* 8 bit sample */ - memory_needed += sample_size * sizeof(float); - } - offset += sample_header_size; - } - offset += sample_size_aggregate; - } - - memory_needed += num_channels * sizeof(jar_xm_channel_context_t); - memory_needed += sizeof(jar_xm_context_t); - return memory_needed; -} - -char* jar_xm_load_module(jar_xm_context_t* ctx, const char* moddata, size_t moddata_length, char* mempool) { - size_t offset = 0; - jar_xm_module_t* mod = &(ctx->module); - - /* Read XM header */ - READ_MEMCPY(mod->name, offset + 17, MODULE_NAME_LENGTH); - READ_MEMCPY(mod->trackername, offset + 38, TRACKER_NAME_LENGTH); - offset += 60; - - /* Read module header */ - uint32_t header_size = READ_U32(offset); - mod->length = READ_U16(offset + 4); - mod->restart_position = READ_U16(offset + 6); - mod->num_channels = READ_U16(offset + 8); - mod->num_patterns = READ_U16(offset + 10); - mod->num_instruments = READ_U16(offset + 12); - mod->patterns = (jar_xm_pattern_t*)mempool; - mod->linear_interpolation = 0; // Linear interpolation can be set after loading - mod->ramping = 1; // ramping can be set after loading - mempool += mod->num_patterns * sizeof(jar_xm_pattern_t); - mempool = ALIGN_PTR(mempool, 16); - mod->instruments = (jar_xm_instrument_t*)mempool; - mempool += mod->num_instruments * sizeof(jar_xm_instrument_t); - mempool = ALIGN_PTR(mempool, 16); - uint16_t flags = READ_U32(offset + 14); - mod->frequency_type = (flags & (1 << 0)) ? jar_xm_LINEAR_FREQUENCIES : jar_xm_AMIGA_FREQUENCIES; - ctx->default_tempo = READ_U16(offset + 16); - ctx->default_bpm = READ_U16(offset + 18); - ctx->tempo =ctx->default_tempo; - ctx->bpm = ctx->default_bpm; - - READ_MEMCPY(mod->pattern_table, offset + 20, PATTERN_ORDER_TABLE_LENGTH); - offset += header_size; - - /* Read patterns */ - for(uint16_t i = 0; i < mod->num_patterns; ++i) { - uint16_t packed_patterndata_size = READ_U16(offset + 7); - jar_xm_pattern_t* pat = mod->patterns + i; - pat->num_rows = READ_U16(offset + 5); - pat->slots = (jar_xm_pattern_slot_t*)mempool; - mempool += mod->num_channels * pat->num_rows * sizeof(jar_xm_pattern_slot_t); - offset += READ_U32(offset); /* Pattern header length */ - - if(packed_patterndata_size == 0) { /* No pattern data is present */ - memset(pat->slots, 0, sizeof(jar_xm_pattern_slot_t) * pat->num_rows * mod->num_channels); - } else { - /* This isn't your typical for loop */ - for(uint16_t j = 0, k = 0; j < packed_patterndata_size; ++k) { - uint8_t note = READ_U8(offset + j); - jar_xm_pattern_slot_t* slot = pat->slots + k; - if(note & (1 << 7)) { - /* MSB is set, this is a compressed packet */ - ++j; - if(note & (1 << 0)) { /* Note follows */ - slot->note = READ_U8(offset + j); - ++j; - } else { - slot->note = 0; - } - if(note & (1 << 1)) { /* Instrument follows */ - slot->instrument = READ_U8(offset + j); - ++j; - } else { - slot->instrument = 0; - } - if(note & (1 << 2)) { /* Volume column follows */ - slot->volume_column = READ_U8(offset + j); - ++j; - } else { - slot->volume_column = 0; - } - if(note & (1 << 3)) { /* Effect follows */ - slot->effect_type = READ_U8(offset + j); - ++j; - } else { - slot->effect_type = 0; - } - if(note & (1 << 4)) { /* Effect parameter follows */ - slot->effect_param = READ_U8(offset + j); - ++j; - } else { - slot->effect_param = 0; - } - } else { /* Uncompressed packet */ - slot->note = note; - slot->instrument = READ_U8(offset + j + 1); - slot->volume_column = READ_U8(offset + j + 2); - slot->effect_type = READ_U8(offset + j + 3); - slot->effect_param = READ_U8(offset + j + 4); - j += 5; - } - } - } - - offset += packed_patterndata_size; - } - mempool = ALIGN_PTR(mempool, 16); - - /* Read instruments */ - for(uint16_t i = 0; i < ctx->module.num_instruments; ++i) { - uint32_t sample_header_size = 0; - jar_xm_instrument_t* instr = mod->instruments + i; - - READ_MEMCPY(instr->name, offset + 4, INSTRUMENT_NAME_LENGTH); - instr->num_samples = READ_U16(offset + 27); - - if(instr->num_samples > 0) { - /* Read extra header properties */ - sample_header_size = READ_U32(offset + 29); - READ_MEMCPY(instr->sample_of_notes, offset + 33, NUM_NOTES); - - instr->volume_envelope.num_points = READ_U8(offset + 225); - instr->panning_envelope.num_points = READ_U8(offset + 226); - - for(uint8_t j = 0; j < instr->volume_envelope.num_points; ++j) { - instr->volume_envelope.points[j].frame = READ_U16(offset + 129 + 4 * j); - instr->volume_envelope.points[j].value = READ_U16(offset + 129 + 4 * j + 2); - } - - for(uint8_t j = 0; j < instr->panning_envelope.num_points; ++j) { - instr->panning_envelope.points[j].frame = READ_U16(offset + 177 + 4 * j); - instr->panning_envelope.points[j].value = READ_U16(offset + 177 + 4 * j + 2); - } - - instr->volume_envelope.sustain_point = READ_U8(offset + 227); - instr->volume_envelope.loop_start_point = READ_U8(offset + 228); - instr->volume_envelope.loop_end_point = READ_U8(offset + 229); - instr->panning_envelope.sustain_point = READ_U8(offset + 230); - instr->panning_envelope.loop_start_point = READ_U8(offset + 231); - instr->panning_envelope.loop_end_point = READ_U8(offset + 232); - - uint8_t flags = READ_U8(offset + 233); - instr->volume_envelope.enabled = flags & (1 << 0); - instr->volume_envelope.sustain_enabled = flags & (1 << 1); - instr->volume_envelope.loop_enabled = flags & (1 << 2); - - flags = READ_U8(offset + 234); - instr->panning_envelope.enabled = flags & (1 << 0); - instr->panning_envelope.sustain_enabled = flags & (1 << 1); - instr->panning_envelope.loop_enabled = flags & (1 << 2); - instr->vibrato_type = READ_U8(offset + 235); - if(instr->vibrato_type == 2) { - instr->vibrato_type = 1; - } else if(instr->vibrato_type == 1) { - instr->vibrato_type = 2; - } - instr->vibrato_sweep = READ_U8(offset + 236); - instr->vibrato_depth = READ_U8(offset + 237); - instr->vibrato_rate = READ_U8(offset + 238); - instr->volume_fadeout = READ_U16(offset + 239); - instr->samples = (jar_xm_sample_t*)mempool; - mempool += instr->num_samples * sizeof(jar_xm_sample_t); - } else { - instr->samples = NULL; - } - - /* Instrument header size */ - offset += READ_U32(offset); - - for(int j = 0; j < instr->num_samples; ++j) { - /* Read sample header */ - jar_xm_sample_t* sample = instr->samples + j; - - sample->length = READ_U32(offset); - sample->loop_start = READ_U32(offset + 4); - sample->loop_length = READ_U32(offset + 8); - sample->loop_end = sample->loop_start + sample->loop_length; - sample->volume = (float)(READ_U8(offset + 12) << 2) / 256.f; - if (sample->volume > 1.0f) {sample->volume = 1.f;}; - sample->finetune = (int8_t)READ_U8(offset + 13); - - uint8_t flags = READ_U8(offset + 14); - switch (flags & 3) { - case 2: - case 3: - sample->loop_type = jar_xm_PING_PONG_LOOP; - case 1: - sample->loop_type = jar_xm_FORWARD_LOOP; - break; - default: - sample->loop_type = jar_xm_NO_LOOP; - break; - }; - sample->bits = (flags & 0x10) ? 16 : 8; - sample->stereo = (flags & 0x20) ? 1 : 0; - sample->panning = (float)READ_U8(offset + 15) / 255.f; - sample->relative_note = (int8_t)READ_U8(offset + 16); - READ_MEMCPY(sample->name, 18, SAMPLE_NAME_LENGTH); - sample->data = (float*)mempool; - if(sample->bits == 16) { - /* 16 bit sample */ - mempool += sample->length * (sizeof(float) >> 1); - sample->loop_start >>= 1; - sample->loop_length >>= 1; - sample->loop_end >>= 1; - sample->length >>= 1; - } else { - /* 8 bit sample */ - mempool += sample->length * sizeof(float); - } - // Adjust loop points to reflect half of the reported length (stereo) - if (sample->stereo && sample->loop_type != jar_xm_NO_LOOP) { - div_t lstart = div(READ_U32(offset + 4), 2); - sample->loop_start = lstart.quot; - div_t llength = div(READ_U32(offset + 8), 2); - sample->loop_length = llength.quot; - sample->loop_end = sample->loop_start + sample->loop_length; - }; - - offset += sample_header_size; - } - - // Read all samples and convert them to float values - for(int j = 0; j < instr->num_samples; ++j) { - /* Read sample data */ - jar_xm_sample_t* sample = instr->samples + j; - int length = sample->length; - if (sample->stereo) { - // Since it is stereo, we cut the sample in half (treated as single channel) - div_t result = div(sample->length, 2); - if(sample->bits == 16) { - int16_t v = 0; - for(int k = 0; k < length; ++k) { - if (k == result.quot) { v = 0;}; - v = v + (int16_t)READ_U16(offset + (k << 1)); - sample->data[k] = (float) v / 32768.f ;//* sign; - if(sample->data[k] < -1.0) {sample->data[k] = -1.0;} else if(sample->data[k] > 1.0) {sample->data[k] = 1.0;}; - } - offset += sample->length << 1; - } else { - int8_t v = 0; - for(int k = 0; k < length; ++k) { - if (k == result.quot) { v = 0;}; - v = v + (int8_t)READ_U8(offset + k); - sample->data[k] = (float)v / 128.f ;//* sign; - if(sample->data[k] < -1.0) {sample->data[k] = -1.0;} else if(sample->data[k] > 1.0) {sample->data[k] = 1.0;}; - } - offset += sample->length; - }; - sample->length = result.quot; - } else { - if(sample->bits == 16) { - int16_t v = 0; - for(int k = 0; k < length; ++k) { - v = v + (int16_t)READ_U16(offset + (k << 1)); - sample->data[k] = (float) v / 32768.f ;//* sign; - if(sample->data[k] < -1.0) {sample->data[k] = -1.0;} else if(sample->data[k] > 1.0) {sample->data[k] = 1.0;}; - } - offset += sample->length << 1; - } else { - int8_t v = 0; - for(int k = 0; k < length; ++k) { - v = v + (int8_t)READ_U8(offset + k); - sample->data[k] = (float)v / 128.f ;//* sign; - if(sample->data[k] < -1.0) {sample->data[k] = -1.0;} else if(sample->data[k] > 1.0) {sample->data[k] = 1.0;}; - } - offset += sample->length; - } - } - }; - }; - return mempool; -}; - -//------------------------------------------------------------------------------- -//THE FOLLOWING IS FOR PLAYING -static float jar_xm_waveform(jar_xm_waveform_type_t, uint8_t); -static void jar_xm_autovibrato(jar_xm_context_t*, jar_xm_channel_context_t*); -static void jar_xm_vibrato(jar_xm_context_t*, jar_xm_channel_context_t*, uint8_t, uint16_t); -static void jar_xm_tremolo(jar_xm_context_t*, jar_xm_channel_context_t*, uint8_t, uint16_t); -static void jar_xm_arpeggio(jar_xm_context_t*, jar_xm_channel_context_t*, uint8_t, uint16_t); -static void jar_xm_tone_portamento(jar_xm_context_t*, jar_xm_channel_context_t*); -static void jar_xm_pitch_slide(jar_xm_context_t*, jar_xm_channel_context_t*, float); -static void jar_xm_panning_slide(jar_xm_channel_context_t*, uint8_t); -static void jar_xm_volume_slide(jar_xm_channel_context_t*, uint8_t); - -static float jar_xm_envelope_lerp(jar_xm_envelope_point_t*, jar_xm_envelope_point_t*, uint16_t); -static void jar_xm_envelope_tick(jar_xm_channel_context_t*, jar_xm_envelope_t*, uint16_t*, float*); -static void jar_xm_envelopes(jar_xm_channel_context_t*); - -static float jar_xm_linear_period(float); -static float jar_xm_linear_frequency(float); -static float jar_xm_amiga_period(float); -static float jar_xm_amiga_frequency(float); -static float jar_xm_period(jar_xm_context_t*, float); -static float jar_xm_frequency(jar_xm_context_t*, float, float); -static void jar_xm_update_frequency(jar_xm_context_t*, jar_xm_channel_context_t*); - -static void jar_xm_handle_note_and_instrument(jar_xm_context_t*, jar_xm_channel_context_t*, jar_xm_pattern_slot_t*); -static void jar_xm_trigger_note(jar_xm_context_t*, jar_xm_channel_context_t*, unsigned int flags); -static void jar_xm_cut_note(jar_xm_channel_context_t*); -static void jar_xm_key_off(jar_xm_channel_context_t*); - -static void jar_xm_post_pattern_change(jar_xm_context_t*); -static void jar_xm_row(jar_xm_context_t*); -static void jar_xm_tick(jar_xm_context_t*); - -static void jar_xm_next_of_sample(jar_xm_context_t*, jar_xm_channel_context_t*, int); -static void jar_xm_mixdown(jar_xm_context_t*, float*, float*); - -#define jar_xm_TRIGGER_KEEP_VOLUME (1 << 0) -#define jar_xm_TRIGGER_KEEP_PERIOD (1 << 1) -#define jar_xm_TRIGGER_KEEP_SAMPLE_POSITION (1 << 2) - - // C-2, C#2, D-2, D#2, E-2, F-2, F#2, G-2, G#2, A-2, A#2, B-2, C-3 -static const uint16_t amiga_frequencies[] = { 1712, 1616, 1525, 1440, 1357, 1281, 1209, 1141, 1077, 1017, 961, 907, 856 }; - - // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f -static const float multi_retrig_add[] = { 0.f, -1.f, -2.f, -4.f, -8.f, -16.f, 0.f, 0.f, 0.f, 1.f, 2.f, 4.f, 8.f, 16.f, 0.f, 0.f }; - - // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f -static const float multi_retrig_multiply[] = { 1.f, 1.f, 1.f, 1.f, 1.f, 1.f, .6666667f, .5f, 1.f, 1.f, 1.f, 1.f, 1.f, 1.f, 1.5f, 2.f }; - -#define jar_xm_CLAMP_UP1F(vol, limit) do { \ - if((vol) > (limit)) (vol) = (limit); \ - } while(0) -#define jar_xm_CLAMP_UP(vol) jar_xm_CLAMP_UP1F((vol), 1.f) - -#define jar_xm_CLAMP_DOWN1F(vol, limit) do { \ - if((vol) < (limit)) (vol) = (limit); \ - } while(0) -#define jar_xm_CLAMP_DOWN(vol) jar_xm_CLAMP_DOWN1F((vol), .0f) - -#define jar_xm_CLAMP2F(vol, up, down) do { \ - if((vol) > (up)) (vol) = (up); \ - else if((vol) < (down)) (vol) = (down); \ - } while(0) -#define jar_xm_CLAMP(vol) jar_xm_CLAMP2F((vol), 1.f, .0f) - -#define jar_xm_SLIDE_TOWARDS(val, goal, incr) do { \ - if((val) > (goal)) { \ - (val) -= (incr); \ - jar_xm_CLAMP_DOWN1F((val), (goal)); \ - } else if((val) < (goal)) { \ - (val) += (incr); \ - jar_xm_CLAMP_UP1F((val), (goal)); \ - } \ - } while(0) - -#define jar_xm_LERP(u, v, t) ((u) + (t) * ((v) - (u))) -#define jar_xm_INVERSE_LERP(u, v, lerp) (((lerp) - (u)) / ((v) - (u))) - -#define HAS_TONE_PORTAMENTO(s) ((s)->effect_type == 3 \ - || (s)->effect_type == 5 \ - || ((s)->volume_column >> 4) == 0xF) -#define HAS_ARPEGGIO(s) ((s)->effect_type == 0 \ - && (s)->effect_param != 0) -#define HAS_VIBRATO(s) ((s)->effect_type == 4 \ - || (s)->effect_param == 6 \ - || ((s)->volume_column >> 4) == 0xB) -#define NOTE_IS_VALID(n) ((n) > 0 && (n) < 97) -#define NOTE_OFF 97 - -static float jar_xm_waveform(jar_xm_waveform_type_t waveform, uint8_t step) { - static unsigned int next_rand = 24492; - step %= 0x40; - switch(waveform) { - case jar_xm_SINE_WAVEFORM: /* No SIN() table used, direct calculation. */ - return -sinf(2.f * 3.141592f * (float)step / (float)0x40); - case jar_xm_RAMP_DOWN_WAVEFORM: /* Ramp down: 1.0f when step = 0; -1.0f when step = 0x40 */ - return (float)(0x20 - step) / 0x20; - case jar_xm_SQUARE_WAVEFORM: /* Square with a 50% duty */ - return (step >= 0x20) ? 1.f : -1.f; - case jar_xm_RANDOM_WAVEFORM: /* Use the POSIX.1-2001 example, just to be deterministic across different machines */ - next_rand = next_rand * 1103515245 + 12345; - return (float)((next_rand >> 16) & 0x7FFF) / (float)0x4000 - 1.f; - case jar_xm_RAMP_UP_WAVEFORM: /* Ramp up: -1.f when step = 0; 1.f when step = 0x40 */ - return (float)(step - 0x20) / 0x20; - default: - break; - } - return .0f; -} - -static void jar_xm_autovibrato(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch) { - if(ch->instrument == NULL || ch->instrument->vibrato_depth == 0) return; - jar_xm_instrument_t* instr = ch->instrument; - float sweep = 1.f; - if(ch->autovibrato_ticks < instr->vibrato_sweep) { sweep = jar_xm_LERP(0.f, 1.f, (float)ch->autovibrato_ticks / (float)instr->vibrato_sweep); } - unsigned int step = ((ch->autovibrato_ticks++) * instr->vibrato_rate) >> 2; - ch->autovibrato_note_offset = .25f * jar_xm_waveform(instr->vibrato_type, step) * (float)instr->vibrato_depth / (float)0xF * sweep; - jar_xm_update_frequency(ctx, ch); -} - -static void jar_xm_vibrato(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, uint8_t param, uint16_t pos) { - unsigned int step = pos * (param >> 4); - ch->vibrato_note_offset = 2.f * jar_xm_waveform(ch->vibrato_waveform, step) * (float)(param & 0x0F) / (float)0xF; - jar_xm_update_frequency(ctx, ch); -} - -static void jar_xm_tremolo(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, uint8_t param, uint16_t pos) { - unsigned int step = pos * (param >> 4); - ch->tremolo_volume = -1.f * jar_xm_waveform(ch->tremolo_waveform, step) * (float)(param & 0x0F) / (float)0xF; -} - -static void jar_xm_arpeggio(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, uint8_t param, uint16_t tick) { - switch(tick % 3) { - case 0: - ch->arp_in_progress = false; - ch->arp_note_offset = 0; - break; - case 2: - ch->arp_in_progress = true; - ch->arp_note_offset = param >> 4; - break; - case 1: - ch->arp_in_progress = true; - ch->arp_note_offset = param & 0x0F; - break; - } - jar_xm_update_frequency(ctx, ch); -} - -static void jar_xm_tone_portamento(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch) { - /* 3xx called without a note, wait until we get an actual target note. */ - if(ch->tone_portamento_target_period == 0.f) return; /* no value, exit */ - if(ch->period != ch->tone_portamento_target_period) { - jar_xm_SLIDE_TOWARDS(ch->period, ch->tone_portamento_target_period, (ctx->module.frequency_type == jar_xm_LINEAR_FREQUENCIES ? 4.f : 1.f) * ch->tone_portamento_param); - jar_xm_update_frequency(ctx, ch); - } -} - -static void jar_xm_pitch_slide(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, float period_offset) { - /* Don't ask about the 4.f coefficient. I found mention of it nowhere. Found by ear™. */ - if(ctx->module.frequency_type == jar_xm_LINEAR_FREQUENCIES) {period_offset *= 4.f; } - ch->period += period_offset; - jar_xm_CLAMP_DOWN(ch->period); - /* XXX: upper bound of period ? */ - jar_xm_update_frequency(ctx, ch); -} - -static void jar_xm_panning_slide(jar_xm_channel_context_t* ch, uint8_t rawval) { - if (rawval & 0xF0) {ch->panning += (float)((rawval & 0xF0 )>> 4) / (float)0xFF;}; - if (rawval & 0x0F) {ch->panning -= (float)(rawval & 0x0F) / (float)0xFF;}; -}; - -static void jar_xm_volume_slide(jar_xm_channel_context_t* ch, uint8_t rawval) { - if (rawval & 0xF0) {ch->volume += (float)((rawval & 0xF0) >> 4) / (float)0x40;}; - if (rawval & 0x0F) {ch->volume -= (float)(rawval & 0x0F) / (float)0x40;}; -}; - -static float jar_xm_envelope_lerp(jar_xm_envelope_point_t* a, jar_xm_envelope_point_t* b, uint16_t pos) { - /* Linear interpolation between two envelope points */ - if(pos <= a->frame) return a->value; - else if(pos >= b->frame) return b->value; - else { - float p = (float)(pos - a->frame) / (float)(b->frame - a->frame); - return a->value * (1 - p) + b->value * p; - } -} - -static void jar_xm_post_pattern_change(jar_xm_context_t* ctx) { - /* Loop if necessary */ - if(ctx->current_table_index >= ctx->module.length) { - ctx->current_table_index = ctx->module.restart_position; - ctx->tempo =ctx->default_tempo; // reset to file default value - ctx->bpm = ctx->default_bpm; // reset to file default value - ctx->global_volume = ctx->default_global_volume; // reset to file default value - } -} - -static float jar_xm_linear_period(float note) { - return 7680.f - note * 64.f; -} - -static float jar_xm_linear_frequency(float period) { - return 8363.f * powf(2.f, (4608.f - period) / 768.f); -} - -static float jar_xm_amiga_period(float note) { - unsigned int intnote = note; - uint8_t a = intnote % 12; - int8_t octave = note / 12.f - 2; - uint16_t p1 = amiga_frequencies[a], p2 = amiga_frequencies[a + 1]; - if(octave > 0) { - p1 >>= octave; - p2 >>= octave; - } else if(octave < 0) { - p1 <<= -octave; - p2 <<= -octave; - } - return jar_xm_LERP(p1, p2, note - intnote); -} - -static float jar_xm_amiga_frequency(float period) { - if(period == .0f) return .0f; - return 7093789.2f / (period * 2.f); /* This is the PAL value. (we could use the NTSC value also) */ -} - -static float jar_xm_period(jar_xm_context_t* ctx, float note) { - switch(ctx->module.frequency_type) { - case jar_xm_LINEAR_FREQUENCIES: - return jar_xm_linear_period(note); - case jar_xm_AMIGA_FREQUENCIES: - return jar_xm_amiga_period(note); - } - return .0f; -} - -static float jar_xm_frequency(jar_xm_context_t* ctx, float period, float note_offset) { - switch(ctx->module.frequency_type) { - case jar_xm_LINEAR_FREQUENCIES: - return jar_xm_linear_frequency(period - 64.f * note_offset); - case jar_xm_AMIGA_FREQUENCIES: - if(note_offset == 0) { return jar_xm_amiga_frequency(period); }; - int8_t octave; - float note; - uint16_t p1, p2; - uint8_t a = octave = 0; - - /* Find the octave of the current period */ - if(period > amiga_frequencies[0]) { - --octave; - while(period > (amiga_frequencies[0] << -octave)) --octave; - } else if(period < amiga_frequencies[12]) { - ++octave; - while(period < (amiga_frequencies[12] >> octave)) ++octave; - } - - /* Find the smallest note closest to the current period */ - for(uint8_t i = 0; i < 12; ++i) { - p1 = amiga_frequencies[i], p2 = amiga_frequencies[i + 1]; - if(octave > 0) { - p1 >>= octave; - p2 >>= octave; - } else if(octave < 0) { - p1 <<= (-octave); - p2 <<= (-octave); - } - if(p2 <= period && period <= p1) { - a = i; - break; - } - } - if(JAR_XM_DEBUG && (p1 < period || p2 > period)) { DEBUG("%i <= %f <= %i should hold but doesn't, this is a bug", p2, period, p1); } - note = 12.f * (octave + 2) + a + jar_xm_INVERSE_LERP(p1, p2, period); - return jar_xm_amiga_frequency(jar_xm_amiga_period(note + note_offset)); - } - - return .0f; -} - -static void jar_xm_update_frequency(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch) { - ch->frequency = jar_xm_frequency( ctx, ch->period, (ch->arp_note_offset > 0 ? ch->arp_note_offset : ( ch->vibrato_note_offset + ch->autovibrato_note_offset )) ); - ch->step = ch->frequency / ctx->rate; -} - -static void jar_xm_handle_note_and_instrument(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, jar_xm_pattern_slot_t* s) { - jar_xm_module_t* mod = &(ctx->module); - if(s->instrument > 0) { - if(HAS_TONE_PORTAMENTO(ch->current) && ch->instrument != NULL && ch->sample != NULL) { /* Tone portamento in effect */ - jar_xm_trigger_note(ctx, ch, jar_xm_TRIGGER_KEEP_PERIOD | jar_xm_TRIGGER_KEEP_SAMPLE_POSITION); - } else if(s->instrument > ctx->module.num_instruments) { /* Invalid instrument, Cut current note */ - jar_xm_cut_note(ch); - ch->instrument = NULL; - ch->sample = NULL; - } else { - ch->instrument = ctx->module.instruments + (s->instrument - 1); - if(s->note == 0 && ch->sample != NULL) { /* Ghost instrument, trigger note */ - /* Sample position is kept, but envelopes are reset */ - jar_xm_trigger_note(ctx, ch, jar_xm_TRIGGER_KEEP_SAMPLE_POSITION); - } - } - } - - if(NOTE_IS_VALID(s->note)) { - // note value is s->note -1 - jar_xm_instrument_t* instr = ch->instrument; - if(HAS_TONE_PORTAMENTO(ch->current) && instr != NULL && ch->sample != NULL) { - /* Tone portamento in effect */ - ch->note = s->note + ch->sample->relative_note + ch->sample->finetune / 128.f - 1.f; - ch->tone_portamento_target_period = jar_xm_period(ctx, ch->note); - } else if(instr == NULL || ch->instrument->num_samples == 0) { /* Issue on instrument */ - jar_xm_cut_note(ch); - } else { - if(instr->sample_of_notes[s->note - 1] < instr->num_samples) { - if (mod->ramping) { - for(int i = 0; i < jar_xm_SAMPLE_RAMPING_POINTS; ++i) { - jar_xm_next_of_sample(ctx, ch, i); - } - ch->frame_count = 0; - }; - ch->sample = instr->samples + instr->sample_of_notes[s->note - 1]; - ch->orig_note = ch->note = s->note + ch->sample->relative_note + ch->sample->finetune / 128.f - 1.f; - if(s->instrument > 0) { - jar_xm_trigger_note(ctx, ch, 0); - } else { /* Ghost note: keep old volume */ - jar_xm_trigger_note(ctx, ch, jar_xm_TRIGGER_KEEP_VOLUME); - } - } else { - jar_xm_cut_note(ch); - } - } - } else if(s->note == NOTE_OFF) { - jar_xm_key_off(ch); - } - - // Interpret Effect column - switch(s->effect_type) { - case 1: /* 1xx: Portamento up */ - if(s->effect_param > 0) { ch->portamento_up_param = s->effect_param; } - break; - case 2: /* 2xx: Portamento down */ - if(s->effect_param > 0) { ch->portamento_down_param = s->effect_param; } - break; - case 3: /* 3xx: Tone portamento */ - if(s->effect_param > 0) { ch->tone_portamento_param = s->effect_param; } - break; - case 4: /* 4xy: Vibrato */ - if(s->effect_param & 0x0F) { ch->vibrato_param = (ch->vibrato_param & 0xF0) | (s->effect_param & 0x0F); } /* Set vibrato depth */ - if(s->effect_param >> 4) { ch->vibrato_param = (s->effect_param & 0xF0) | (ch->vibrato_param & 0x0F); } /* Set vibrato speed */ - break; - case 5: /* 5xy: Tone portamento + Volume slide */ - if(s->effect_param > 0) { ch->volume_slide_param = s->effect_param; } - break; - case 6: /* 6xy: Vibrato + Volume slide */ - if(s->effect_param > 0) { ch->volume_slide_param = s->effect_param; } - break; - case 7: /* 7xy: Tremolo */ - if(s->effect_param & 0x0F) { ch->tremolo_param = (ch->tremolo_param & 0xF0) | (s->effect_param & 0x0F); } /* Set tremolo depth */ - if(s->effect_param >> 4) { ch->tremolo_param = (s->effect_param & 0xF0) | (ch->tremolo_param & 0x0F); } /* Set tremolo speed */ - break; - case 8: /* 8xx: Set panning */ - ch->panning = (float)s->effect_param / 255.f; - break; - case 9: /* 9xx: Sample offset */ - if(ch->sample != 0) { //&& NOTE_IS_VALID(s->note)) { - uint32_t final_offset = s->effect_param << (ch->sample->bits == 16 ? 7 : 8); - switch (ch->sample->loop_type) { - case jar_xm_NO_LOOP: - if(final_offset >= ch->sample->length) { /* Pretend the sample dosen't loop and is done playing */ - ch->sample_position = -1; - } else { - ch->sample_position = final_offset; - } - break; - case jar_xm_FORWARD_LOOP: - if (final_offset >= ch->sample->loop_end) { - ch->sample_position -= ch->sample->loop_length; - } else if(final_offset >= ch->sample->length) { - ch->sample_position = ch->sample->loop_start; - } else { - ch->sample_position = final_offset; - } - break; - case jar_xm_PING_PONG_LOOP: - if(final_offset >= ch->sample->loop_end) { - ch->ping = false; - ch->sample_position = (ch->sample->loop_end << 1) - ch->sample_position; - } else if(final_offset >= ch->sample->length) { - ch->ping = false; - ch->sample_position -= ch->sample->length - 1; - } else { - ch->sample_position = final_offset; - }; - break; - } - } - break; - case 0xA: /* Axy: Volume slide */ - if(s->effect_param > 0) { ch->volume_slide_param = s->effect_param; } - break; - case 0xB: /* Bxx: Position jump */ - if(s->effect_param < ctx->module.length) { - ctx->position_jump = true; - ctx->jump_dest = s->effect_param; - } - break; - case 0xC: /* Cxx: Set volume */ - ch->volume = (float)((s->effect_param > 0x40) ? 0x40 : s->effect_param) / (float)0x40; - break; - case 0xD: /* Dxx: Pattern break */ - /* Jump after playing this line */ - ctx->pattern_break = true; - ctx->jump_row = (s->effect_param >> 4) * 10 + (s->effect_param & 0x0F); - break; - case 0xE: /* EXy: Extended command */ - switch(s->effect_param >> 4) { - case 1: /* E1y: Fine portamento up */ - if(s->effect_param & 0x0F) { ch->fine_portamento_up_param = s->effect_param & 0x0F; } - jar_xm_pitch_slide(ctx, ch, -ch->fine_portamento_up_param); - break; - case 2: /* E2y: Fine portamento down */ - if(s->effect_param & 0x0F) { ch->fine_portamento_down_param = s->effect_param & 0x0F; } - jar_xm_pitch_slide(ctx, ch, ch->fine_portamento_down_param); - break; - case 4: /* E4y: Set vibrato control */ - ch->vibrato_waveform = s->effect_param & 3; - ch->vibrato_waveform_retrigger = !((s->effect_param >> 2) & 1); - break; - case 5: /* E5y: Set finetune */ - if(NOTE_IS_VALID(ch->current->note) && ch->sample != NULL) { - ch->note = ch->current->note + ch->sample->relative_note + (float)(((s->effect_param & 0x0F) - 8) << 4) / 128.f - 1.f; - ch->period = jar_xm_period(ctx, ch->note); - jar_xm_update_frequency(ctx, ch); - } - break; - case 6: /* E6y: Pattern loop */ - if(s->effect_param & 0x0F) { - if((s->effect_param & 0x0F) == ch->pattern_loop_count) { /* Loop is over */ - ch->pattern_loop_count = 0; - ctx->position_jump = false; - } else { /* Jump to the beginning of the loop */ - ch->pattern_loop_count++; - ctx->position_jump = true; - ctx->jump_row = ch->pattern_loop_origin; - ctx->jump_dest = ctx->current_table_index; - } - } else { - ch->pattern_loop_origin = ctx->current_row; /* Set loop start point */ - ctx->jump_row = ch->pattern_loop_origin; /* Replicate FT2 E60 bug */ - } - break; - case 7: /* E7y: Set tremolo control */ - ch->tremolo_waveform = s->effect_param & 3; - ch->tremolo_waveform_retrigger = !((s->effect_param >> 2) & 1); - break; - case 0xA: /* EAy: Fine volume slide up */ - if(s->effect_param & 0x0F) { ch->fine_volume_slide_param = s->effect_param & 0x0F; } - jar_xm_volume_slide(ch, ch->fine_volume_slide_param << 4); - break; - case 0xB: /* EBy: Fine volume slide down */ - if(s->effect_param & 0x0F) { ch->fine_volume_slide_param = s->effect_param & 0x0F; } - jar_xm_volume_slide(ch, ch->fine_volume_slide_param); - break; - case 0xD: /* EDy: Note delay */ - /* XXX: figure this out better. EDx triggers the note even when there no note and no instrument. But ED0 acts like like a ghost note, EDx (x ≠ 0) does not. */ - if(s->note == 0 && s->instrument == 0) { - unsigned int flags = jar_xm_TRIGGER_KEEP_VOLUME; - if(ch->current->effect_param & 0x0F) { - ch->note = ch->orig_note; - jar_xm_trigger_note(ctx, ch, flags); - } else { - jar_xm_trigger_note(ctx, ch, flags | jar_xm_TRIGGER_KEEP_PERIOD | jar_xm_TRIGGER_KEEP_SAMPLE_POSITION ); - } - } - break; - - case 0xE: /* EEy: Pattern delay */ - ctx->extra_ticks = (ch->current->effect_param & 0x0F) * ctx->tempo; - break; - default: - break; - } - break; - - case 0xF: /* Fxx: Set tempo/BPM */ - if(s->effect_param > 0) { - if(s->effect_param <= 0x1F) { // First 32 possible values adjust the ticks (goes into tempo) - ctx->tempo = s->effect_param; - } else { //32 and greater values adjust the BPM - ctx->bpm = s->effect_param; - } - } - break; - - case 16: /* Gxx: Set global volume */ - ctx->global_volume = (float)((s->effect_param > 0x40) ? 0x40 : s->effect_param) / (float)0x40; - break; - case 17: /* Hxy: Global volume slide */ - if(s->effect_param > 0) { ch->global_volume_slide_param = s->effect_param; } - break; - case 21: /* Lxx: Set envelope position */ - ch->volume_envelope_frame_count = s->effect_param; - ch->panning_envelope_frame_count = s->effect_param; - break; - case 25: /* Pxy: Panning slide */ - if(s->effect_param > 0) { ch->panning_slide_param = s->effect_param; } - break; - case 27: /* Rxy: Multi retrig note */ - if(s->effect_param > 0) { - if((s->effect_param >> 4) == 0) { /* Keep previous x value */ - ch->multi_retrig_param = (ch->multi_retrig_param & 0xF0) | (s->effect_param & 0x0F); - } else { - ch->multi_retrig_param = s->effect_param; - } - } - break; - case 29: /* Txy: Tremor */ - if(s->effect_param > 0) { ch->tremor_param = s->effect_param; } /* Tremor x and y params are not separately kept in memory, unlike Rxy */ - break; - case 33: /* Xxy: Extra stuff */ - switch(s->effect_param >> 4) { - case 1: /* X1y: Extra fine portamento up */ - if(s->effect_param & 0x0F) { ch->extra_fine_portamento_up_param = s->effect_param & 0x0F; } - jar_xm_pitch_slide(ctx, ch, -1.0f * ch->extra_fine_portamento_up_param); - break; - case 2: /* X2y: Extra fine portamento down */ - if(s->effect_param & 0x0F) { ch->extra_fine_portamento_down_param = s->effect_param & 0x0F; } - jar_xm_pitch_slide(ctx, ch, ch->extra_fine_portamento_down_param); - break; - default: - break; - } - break; - default: - break; - } -} - -static void jar_xm_trigger_note(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, unsigned int flags) { - if (!(flags & jar_xm_TRIGGER_KEEP_SAMPLE_POSITION)) { - ch->sample_position = 0.f; - ch->ping = true; - }; - - if (!(flags & jar_xm_TRIGGER_KEEP_VOLUME)) { - if(ch->sample != NULL) { - ch->volume = ch->sample->volume; - }; - }; - ch->panning = ch->sample->panning; - ch->sustained = true; - ch->fadeout_volume = ch->volume_envelope_volume = 1.0f; - ch->panning_envelope_panning = .5f; - ch->volume_envelope_frame_count = ch->panning_envelope_frame_count = 0; - ch->vibrato_note_offset = 0.f; - ch->tremolo_volume = 0.f; - ch->tremor_on = false; - ch->autovibrato_ticks = 0; - - if(ch->vibrato_waveform_retrigger) { ch->vibrato_ticks = 0; } /* XXX: should the waveform itself also be reset to sine? */ - if(ch->tremolo_waveform_retrigger) { ch->tremolo_ticks = 0; } - if(!(flags & jar_xm_TRIGGER_KEEP_PERIOD)) { - ch->period = jar_xm_period(ctx, ch->note); - jar_xm_update_frequency(ctx, ch); - } - ch->latest_trigger = ctx->generated_samples; - if(ch->instrument != NULL) { ch->instrument->latest_trigger = ctx->generated_samples; } - if(ch->sample != NULL) { ch->sample->latest_trigger = ctx->generated_samples; } -} - -static void jar_xm_cut_note(jar_xm_channel_context_t* ch) { - ch->volume = .0f; /* NB: this is not the same as Key Off */ -// ch->curr_left = .0f; -// ch->curr_right = .0f; -} - -static void jar_xm_key_off(jar_xm_channel_context_t* ch) { - ch->sustained = false; /* Key Off */ - if(ch->instrument == NULL || !ch->instrument->volume_envelope.enabled) { jar_xm_cut_note(ch); } /* If no volume envelope is used, also cut the note */ -} - -static void jar_xm_row(jar_xm_context_t* ctx) { - if(ctx->position_jump) { - ctx->current_table_index = ctx->jump_dest; - ctx->current_row = ctx->jump_row; - ctx->position_jump = false; - ctx->pattern_break = false; - ctx->jump_row = 0; - jar_xm_post_pattern_change(ctx); - } else if(ctx->pattern_break) { - ctx->current_table_index++; - ctx->current_row = ctx->jump_row; - ctx->pattern_break = false; - ctx->jump_row = 0; - jar_xm_post_pattern_change(ctx); - } - jar_xm_pattern_t* cur = ctx->module.patterns + ctx->module.pattern_table[ctx->current_table_index]; - bool in_a_loop = false; - - /* Read notes information for all channels into temporary pattern slot */ - for(uint8_t i = 0; i < ctx->module.num_channels; ++i) { - jar_xm_pattern_slot_t* s = cur->slots + ctx->current_row * ctx->module.num_channels + i; - jar_xm_channel_context_t* ch = ctx->channels + i; - ch->current = s; - // If there is no note delay effect (0xED) then... - if(s->effect_type != 0xE || s->effect_param >> 4 != 0xD) { - //********** Process the channel slot information ********** - jar_xm_handle_note_and_instrument(ctx, ch, s); - } else { - // read the note delay information - ch->note_delay_param = s->effect_param & 0x0F; - } - if(!in_a_loop && ch->pattern_loop_count > 0) { - // clarify if in a loop or not - in_a_loop = true; - } - } - - if(!in_a_loop) { - /* No E6y loop is in effect (or we are in the first pass) */ - ctx->loop_count = (ctx->row_loop_count[MAX_NUM_ROWS * ctx->current_table_index + ctx->current_row]++); - } - - /// Move to next row - ctx->current_row++; /* uint8 warning: can increment from 255 to 0, in which case it is still necessary to go the next pattern. */ - if (!ctx->position_jump && !ctx->pattern_break && (ctx->current_row >= cur->num_rows || ctx->current_row == 0)) { - ctx->current_table_index++; - ctx->current_row = ctx->jump_row; /* This will be 0 most of the time, except when E60 is used */ - ctx->jump_row = 0; - jar_xm_post_pattern_change(ctx); - } -} - -static void jar_xm_envelope_tick(jar_xm_channel_context_t *ch, jar_xm_envelope_t *env, uint16_t *counter, float *outval) { - if(env->num_points < 2) { - if(env->num_points == 1) { - *outval = (float)env->points[0].value / (float)0x40; - if(*outval > 1) { *outval = 1; }; - } else {; - return; - }; - } else { - if(env->loop_enabled) { - uint16_t loop_start = env->points[env->loop_start_point].frame; - uint16_t loop_end = env->points[env->loop_end_point].frame; - uint16_t loop_length = loop_end - loop_start; - if(*counter >= loop_end) { *counter -= loop_length; }; - }; - for(uint8_t j = 0; j < (env->num_points - 1); ++j) { - if(env->points[j].frame <= *counter && env->points[j+1].frame >= *counter) { - *outval = jar_xm_envelope_lerp(env->points + j, env->points + j + 1, *counter) / (float)0x40; - break; - }; - }; - /* Make sure it is safe to increment frame count */ - if(!ch->sustained || !env->sustain_enabled || *counter != env->points[env->sustain_point].frame) { (*counter)++; }; - }; -}; - -static void jar_xm_envelopes(jar_xm_channel_context_t *ch) { - if(ch->instrument != NULL) { - if(ch->instrument->volume_envelope.enabled) { - if(!ch->sustained) { - ch->fadeout_volume -= (float)ch->instrument->volume_fadeout / 65536.f; - jar_xm_CLAMP_DOWN(ch->fadeout_volume); - }; - jar_xm_envelope_tick(ch, &(ch->instrument->volume_envelope), &(ch->volume_envelope_frame_count), &(ch->volume_envelope_volume)); - }; - if(ch->instrument->panning_envelope.enabled) { - jar_xm_envelope_tick(ch, &(ch->instrument->panning_envelope), &(ch->panning_envelope_frame_count), &(ch->panning_envelope_panning)); - }; - }; -}; - -static void jar_xm_tick(jar_xm_context_t* ctx) { - if(ctx->current_tick == 0) { - jar_xm_row(ctx); // We have processed all ticks and we run the row - } - - jar_xm_module_t* mod = &(ctx->module); - for(uint8_t i = 0; i < ctx->module.num_channels; ++i) { - jar_xm_channel_context_t* ch = ctx->channels + i; - jar_xm_envelopes(ch); - jar_xm_autovibrato(ctx, ch); - if(ch->arp_in_progress && !HAS_ARPEGGIO(ch->current)) { - ch->arp_in_progress = false; - ch->arp_note_offset = 0; - jar_xm_update_frequency(ctx, ch); - } - if(ch->vibrato_in_progress && !HAS_VIBRATO(ch->current)) { - ch->vibrato_in_progress = false; - ch->vibrato_note_offset = 0.f; - jar_xm_update_frequency(ctx, ch); - } - - // Effects in volumne column mostly handled on a per tick basis - switch(ch->current->volume_column & 0xF0) { - case 0x50: // Checks for volume = 64 - if(ch->current->volume_column != 0x50) break; - case 0x10: // Set volume 0-15 - case 0x20: // Set volume 16-32 - case 0x30: // Set volume 32-48 - case 0x40: // Set volume 48-64 - ch->volume = (float)(ch->current->volume_column - 16) / 64.0f; - break; - case 0x60: // Volume slide down - jar_xm_volume_slide(ch, ch->current->volume_column & 0x0F); - break; - case 0x70: // Volume slide up - jar_xm_volume_slide(ch, ch->current->volume_column << 4); - break; - case 0x80: // Fine volume slide down - jar_xm_volume_slide(ch, ch->current->volume_column & 0x0F); - break; - case 0x90: // Fine volume slide up - jar_xm_volume_slide(ch, ch->current->volume_column << 4); - break; - case 0xA0: // Set vibrato speed - ch->vibrato_param = (ch->vibrato_param & 0x0F) | ((ch->current->volume_column & 0x0F) << 4); - break; - case 0xB0: // Vibrato - ch->vibrato_in_progress = false; - jar_xm_vibrato(ctx, ch, ch->vibrato_param, ch->vibrato_ticks++); - break; - case 0xC0: // Set panning - if(!ctx->current_tick ) { - ch->panning = (float)(ch->current->volume_column & 0x0F) / 15.0f; - } - break; - case 0xD0: // Panning slide left - jar_xm_panning_slide(ch, ch->current->volume_column & 0x0F); - break; - case 0xE0: // Panning slide right - jar_xm_panning_slide(ch, ch->current->volume_column << 4); - break; - case 0xF0: // Tone portamento - if(!ctx->current_tick ) { - if(ch->current->volume_column & 0x0F) { ch->tone_portamento_param = ((ch->current->volume_column & 0x0F) << 4) | (ch->current->volume_column & 0x0F); } - }; - jar_xm_tone_portamento(ctx, ch); - break; - default: - break; - } - - // Only some standard effects handled on a per tick basis - // see jar_xm_handle_note_and_instrument for all effects handling on a per row basis - switch(ch->current->effect_type) { - case 0: /* 0xy: Arpeggio */ - if(ch->current->effect_param > 0) { - char arp_offset = ctx->tempo % 3; - switch(arp_offset) { - case 2: /* 0 -> x -> 0 -> y -> x -> … */ - if(ctx->current_tick == 1) { - ch->arp_in_progress = true; - ch->arp_note_offset = ch->current->effect_param >> 4; - jar_xm_update_frequency(ctx, ch); - break; - } - /* No break here, this is intended */ - case 1: /* 0 -> 0 -> y -> x -> … */ - if(ctx->current_tick == 0) { - ch->arp_in_progress = false; - ch->arp_note_offset = 0; - jar_xm_update_frequency(ctx, ch); - break; - } - /* No break here, this is intended */ - case 0: /* 0 -> y -> x -> … */ - jar_xm_arpeggio(ctx, ch, ch->current->effect_param, ctx->current_tick - arp_offset); - default: - break; - } - } - break; - - case 1: /* 1xx: Portamento up */ - if(ctx->current_tick == 0) break; - jar_xm_pitch_slide(ctx, ch, -ch->portamento_up_param); - break; - case 2: /* 2xx: Portamento down */ - if(ctx->current_tick == 0) break; - jar_xm_pitch_slide(ctx, ch, ch->portamento_down_param); - break; - case 3: /* 3xx: Tone portamento */ - if(ctx->current_tick == 0) break; - jar_xm_tone_portamento(ctx, ch); - break; - case 4: /* 4xy: Vibrato */ - if(ctx->current_tick == 0) break; - ch->vibrato_in_progress = true; - jar_xm_vibrato(ctx, ch, ch->vibrato_param, ch->vibrato_ticks++); - break; - case 5: /* 5xy: Tone portamento + Volume slide */ - if(ctx->current_tick == 0) break; - jar_xm_tone_portamento(ctx, ch); - jar_xm_volume_slide(ch, ch->volume_slide_param); - break; - case 6: /* 6xy: Vibrato + Volume slide */ - if(ctx->current_tick == 0) break; - ch->vibrato_in_progress = true; - jar_xm_vibrato(ctx, ch, ch->vibrato_param, ch->vibrato_ticks++); - jar_xm_volume_slide(ch, ch->volume_slide_param); - break; - case 7: /* 7xy: Tremolo */ - if(ctx->current_tick == 0) break; - jar_xm_tremolo(ctx, ch, ch->tremolo_param, ch->tremolo_ticks++); - break; - case 8: /* 8xy: Set panning */ - break; - case 9: /* 9xy: Sample offset */ - break; - case 0xA: /* Axy: Volume slide */ - if(ctx->current_tick == 0) break; - jar_xm_volume_slide(ch, ch->volume_slide_param); - break; - case 0xE: /* EXy: Extended command */ - switch(ch->current->effect_param >> 4) { - case 0x9: /* E9y: Retrigger note */ - if(ctx->current_tick != 0 && ch->current->effect_param & 0x0F) { - if(!(ctx->current_tick % (ch->current->effect_param & 0x0F))) { - jar_xm_trigger_note(ctx, ch, 0); - jar_xm_envelopes(ch); - } - } - break; - case 0xC: /* ECy: Note cut */ - if((ch->current->effect_param & 0x0F) == ctx->current_tick) { - jar_xm_cut_note(ch); - } - break; - case 0xD: /* EDy: Note delay */ - if(ch->note_delay_param == ctx->current_tick) { - jar_xm_handle_note_and_instrument(ctx, ch, ch->current); - jar_xm_envelopes(ch); - } - break; - default: - break; - } - break; - case 16: /* Fxy: Set tempo/BPM */ - break; - case 17: /* Hxy: Global volume slide */ - if(ctx->current_tick == 0) break; - if((ch->global_volume_slide_param & 0xF0) && (ch->global_volume_slide_param & 0x0F)) { break; }; /* Invalid state */ - if(ch->global_volume_slide_param & 0xF0) { /* Global slide up */ - float f = (float)(ch->global_volume_slide_param >> 4) / (float)0x40; - ctx->global_volume += f; - jar_xm_CLAMP_UP(ctx->global_volume); - } else { /* Global slide down */ - float f = (float)(ch->global_volume_slide_param & 0x0F) / (float)0x40; - ctx->global_volume -= f; - jar_xm_CLAMP_DOWN(ctx->global_volume); - }; - break; - - case 20: /* Kxx: Key off */ - if(ctx->current_tick == ch->current->effect_param) { jar_xm_key_off(ch); }; - break; - case 21: /* Lxx: Set envelope position */ - break; - case 25: /* Pxy: Panning slide */ - if(ctx->current_tick == 0) break; - jar_xm_panning_slide(ch, ch->panning_slide_param); - break; - case 27: /* Rxy: Multi retrig note */ - if(ctx->current_tick == 0) break; - if(((ch->multi_retrig_param) & 0x0F) == 0) break; - if((ctx->current_tick % (ch->multi_retrig_param & 0x0F)) == 0) { - float v = ch->volume * multi_retrig_multiply[ch->multi_retrig_param >> 4] - + multi_retrig_add[ch->multi_retrig_param >> 4]; - jar_xm_CLAMP(v); - jar_xm_trigger_note(ctx, ch, 0); - ch->volume = v; - }; - break; - - case 29: /* Txy: Tremor */ - if(ctx->current_tick == 0) break; - ch->tremor_on = ( (ctx->current_tick - 1) % ((ch->tremor_param >> 4) + (ch->tremor_param & 0x0F) + 2) > (ch->tremor_param >> 4) ); - break; - default: - break; - }; - - float panning, volume; - panning = ch->panning + (ch->panning_envelope_panning - .5f) * (.5f - fabs(ch->panning - .5f)) * 2.0f; - if(ch->tremor_on) { - volume = .0f; - } else { - volume = ch->volume + ch->tremolo_volume; - jar_xm_CLAMP(volume); - volume *= ch->fadeout_volume * ch->volume_envelope_volume; - }; - - if (mod->ramping) { - ch->target_panning = panning; - ch->target_volume = volume; - } else { - ch->actual_panning = panning; - ch->actual_volume = volume; - }; - }; - - ctx->current_tick++; // ok so we understand that ticks increment within the row - if(ctx->current_tick >= ctx->tempo + ctx->extra_ticks) { - // This means it reached the end of the row and we reset - ctx->current_tick = 0; - ctx->extra_ticks = 0; - }; - - // Number of ticks / second = BPM * 0.4 - ctx->remaining_samples_in_tick += (float)ctx->rate / ((float)ctx->bpm * 0.4f); -}; - -static void jar_xm_next_of_sample(jar_xm_context_t* ctx, jar_xm_channel_context_t* ch, int previous) { - jar_xm_module_t* mod = &(ctx->module); - -// ch->curr_left = 0.f; -// ch->curr_right = 0.f; - if(ch->instrument == NULL || ch->sample == NULL || ch->sample_position < 0) { - ch->curr_left = 0.f; - ch->curr_right = 0.f; - if (mod->ramping) { - if (ch->frame_count < jar_xm_SAMPLE_RAMPING_POINTS) { - if (previous > -1) { - ch->end_of_previous_sample_left[previous] = jar_xm_LERP(ch->end_of_previous_sample_left[ch->frame_count], ch->curr_left, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - ch->end_of_previous_sample_right[previous] = jar_xm_LERP(ch->end_of_previous_sample_right[ch->frame_count], ch->curr_right, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - } else { - ch->curr_left = jar_xm_LERP(ch->end_of_previous_sample_left[ch->frame_count], ch->curr_left, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - ch->curr_right = jar_xm_LERP(ch->end_of_previous_sample_right[ch->frame_count], ch->curr_right, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - }; - }; - }; - return; - }; - if(ch->sample->length == 0) { - return; - }; - - float t = 0.f; - uint32_t b = 0; - if(mod->linear_interpolation) { - b = ch->sample_position + 1; - t = ch->sample_position - (uint32_t)ch->sample_position; /* Cheaper than fmodf(., 1.f) */ - }; - - float u_left, u_right; - u_left = ch->sample->data[(uint32_t)ch->sample_position]; - if (ch->sample->stereo) { - u_right = ch->sample->data[(uint32_t)ch->sample_position + ch->sample->length]; - } else { - u_right = u_left; - }; - float v_left = 0.f, v_right = 0.f; - switch(ch->sample->loop_type) { - case jar_xm_NO_LOOP: - if(mod->linear_interpolation) { - v_left = (b < ch->sample->length) ? ch->sample->data[b] : .0f; - if (ch->sample->stereo) { - v_right = (b < ch->sample->length) ? ch->sample->data[b + ch->sample->length] : .0f; - } else { - v_right = v_left; - }; - }; - ch->sample_position += ch->step; - if(ch->sample_position >= ch->sample->length) { ch->sample_position = -1; } // stop playing this sample - break; - case jar_xm_FORWARD_LOOP: - if(mod->linear_interpolation) { - v_left = ch->sample->data[ (b == ch->sample->loop_end) ? ch->sample->loop_start : b ]; - if (ch->sample->stereo) { - v_right = ch->sample->data[ (b == ch->sample->loop_end) ? ch->sample->loop_start + ch->sample->length : b + ch->sample->length]; - } else { - v_right = v_left; - }; - }; - ch->sample_position += ch->step; - if (ch->sample_position >= ch->sample->loop_end) { - ch->sample_position -= ch->sample->loop_length; - }; - if(ch->sample_position >= ch->sample->length) { - ch->sample_position = ch->sample->loop_start; - }; - break; - case jar_xm_PING_PONG_LOOP: - if(ch->ping) { - if(mod->linear_interpolation) { - v_left = (b >= ch->sample->loop_end) ? ch->sample->data[(uint32_t)ch->sample_position] : ch->sample->data[b]; - if (ch->sample->stereo) { - v_right = (b >= ch->sample->loop_end) ? ch->sample->data[(uint32_t)ch->sample_position + ch->sample->length] : ch->sample->data[b + ch->sample->length]; - } else { - v_right = v_left; - }; - }; - ch->sample_position += ch->step; - if(ch->sample_position >= ch->sample->loop_end) { - ch->ping = false; - ch->sample_position = (ch->sample->loop_end << 1) - ch->sample_position; - }; - if(ch->sample_position >= ch->sample->length) { - ch->ping = false; - ch->sample_position -= ch->sample->length - 1; - }; - } else { - if(mod->linear_interpolation) { - v_left = u_left; - v_right = u_right; - u_left = (b == 1 || b - 2 <= ch->sample->loop_start) ? ch->sample->data[(uint32_t)ch->sample_position] : ch->sample->data[b - 2]; - if (ch->sample->stereo) { - u_right = (b == 1 || b - 2 <= ch->sample->loop_start) ? ch->sample->data[(uint32_t)ch->sample_position + ch->sample->length] : ch->sample->data[b + ch->sample->length - 2]; - } else { - u_right = u_left; - }; - }; - ch->sample_position -= ch->step; - if(ch->sample_position <= ch->sample->loop_start) { - ch->ping = true; - ch->sample_position = (ch->sample->loop_start << 1) - ch->sample_position; - }; - if (ch->sample_position <= .0f) { - ch->ping = true; - ch->sample_position = .0f; - }; - }; - break; - - default: - v_left = .0f; - v_right = .0f; - break; - }; - - float endval_left = mod->linear_interpolation ? jar_xm_LERP(u_left, v_left, t) : u_left; - float endval_right = mod->linear_interpolation ? jar_xm_LERP(u_right, v_right, t) : u_right; - - if (mod->ramping) { - if(ch->frame_count < jar_xm_SAMPLE_RAMPING_POINTS) { - /* Smoothly transition between old and new sample. */ - if (previous > -1) { - ch->end_of_previous_sample_left[previous] = jar_xm_LERP(ch->end_of_previous_sample_left[ch->frame_count], endval_left, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - ch->end_of_previous_sample_right[previous] = jar_xm_LERP(ch->end_of_previous_sample_right[ch->frame_count], endval_right, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - } else { - ch->curr_left = jar_xm_LERP(ch->end_of_previous_sample_left[ch->frame_count], endval_left, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - ch->curr_right = jar_xm_LERP(ch->end_of_previous_sample_right[ch->frame_count], endval_right, (float)ch->frame_count / (float)jar_xm_SAMPLE_RAMPING_POINTS); - }; - }; - }; - - if (previous > -1) { - ch->end_of_previous_sample_left[previous] = endval_left; - ch->end_of_previous_sample_right[previous] = endval_right; - } else { - ch->curr_left = endval_left; - ch->curr_right = endval_right; - }; -}; - -// gather all channel audio into stereo float -static void jar_xm_mixdown(jar_xm_context_t* ctx, float* left, float* right) { - jar_xm_module_t* mod = &(ctx->module); - - if(ctx->remaining_samples_in_tick <= 0) { - jar_xm_tick(ctx); - }; - ctx->remaining_samples_in_tick--; - *left = 0.f; - *right = 0.f; - if(ctx->max_loop_count > 0 && ctx->loop_count > ctx->max_loop_count) { return; } - - for(uint8_t i = 0; i < ctx->module.num_channels; ++i) { - jar_xm_channel_context_t* ch = ctx->channels + i; - if(ch->instrument != NULL && ch->sample != NULL && ch->sample_position >= 0) { - jar_xm_next_of_sample(ctx, ch, -1); - if(!ch->muted && !ch->instrument->muted) { - *left += ch->curr_left * ch->actual_volume * (1.f - ch->actual_panning); - *right += ch->curr_right * ch->actual_volume * ch->actual_panning; - }; - - if (mod->ramping) { - ch->frame_count++; - jar_xm_SLIDE_TOWARDS(ch->actual_volume, ch->target_volume, ctx->volume_ramp); - jar_xm_SLIDE_TOWARDS(ch->actual_panning, ch->target_panning, ctx->panning_ramp); - }; - }; - }; - if (ctx->global_volume != 1.0f) { - *left *= ctx->global_volume; - *right *= ctx->global_volume; - }; - - // experimental -// float counter = (float)ctx->generated_samples * 0.0001f -// *left = tan(&left + sin(counter)); -// *right = tan(&right + cos(counter)); - - // apply brick wall limiter when audio goes beyond bounderies - if(*left < -1.0) {*left = -1.0;} else if(*left > 1.0) {*left = 1.0;}; - if(*right < -1.0) {*right = -1.0;} else if(*right > 1.0) {*right = 1.0;}; -}; - -void jar_xm_generate_samples(jar_xm_context_t* ctx, float* output, size_t numsamples) { - if(ctx && output) { - ctx->generated_samples += numsamples; - for(size_t i = 0; i < numsamples; i++) { - jar_xm_mixdown(ctx, output + (2 * i), output + (2 * i + 1)); - }; - }; -}; - -uint64_t jar_xm_get_remaining_samples(jar_xm_context_t* ctx) { - uint64_t total = 0; - uint8_t currentLoopCount = jar_xm_get_loop_count(ctx); - jar_xm_set_max_loop_count(ctx, 0); - while(jar_xm_get_loop_count(ctx) == currentLoopCount) { - total += ctx->remaining_samples_in_tick; - ctx->remaining_samples_in_tick = 0; - jar_xm_tick(ctx); - } - ctx->loop_count = currentLoopCount; - return total; -} - -//-------------------------------------------- -//FILE LOADER - TODO - NEEDS TO BE CLEANED UP -//-------------------------------------------- -#undef DEBUG -#define DEBUG(...) do { \ - fprintf(stderr, __VA_ARGS__); \ - fflush(stderr); \ - } while(0) - -#define DEBUG_ERR(...) do { \ - fprintf(stderr, __VA_ARGS__); \ - fflush(stderr); \ - } while(0) - -#define FATAL(...) do { \ - fprintf(stderr, __VA_ARGS__); \ - fflush(stderr); \ - exit(1); \ - } while(0) - -#define FATAL_ERR(...) do { \ - fprintf(stderr, __VA_ARGS__); \ - fflush(stderr); \ - exit(1); \ - } while(0) - - -int jar_xm_create_context_from_file(jar_xm_context_t** ctx, uint32_t rate, const char* filename) { - FILE* xmf; - int size; - int ret; - - xmf = fopen(filename, "rb"); - if(xmf == NULL) { - DEBUG_ERR("Could not open input file"); - *ctx = NULL; - return 3; - } - - fseek(xmf, 0, SEEK_END); - size = ftell(xmf); - rewind(xmf); - if(size == -1) { - fclose(xmf); - DEBUG_ERR("fseek() failed"); - *ctx = NULL; - return 4; - } - - char* data = JARXM_MALLOC(size + 1); - if(!data || fread(data, 1, size, xmf) < size) { - fclose(xmf); - DEBUG_ERR(data ? "fread() failed" : "JARXM_MALLOC() failed"); - JARXM_FREE(data); - *ctx = NULL; - return 5; - } - - fclose(xmf); - - ret = jar_xm_create_context_safe(ctx, data, size, rate); - JARXM_FREE(data); - - switch(ret) { - case 0: - break; - case 1: DEBUG("could not create context: module is not sane\n"); - *ctx = NULL; - return 1; - break; - case 2: FATAL("could not create context: malloc failed\n"); - return 2; - break; - default: FATAL("could not create context: unknown error\n"); - return 6; - break; - } - - return 0; -} - -// not part of the original library -void jar_xm_reset(jar_xm_context_t* ctx) { - for (uint16_t i = 0; i < jar_xm_get_number_of_channels(ctx); i++) { - jar_xm_cut_note(&ctx->channels[i]); - } - ctx->current_row = 0; - ctx->current_table_index = 0; - ctx->current_tick = 0; - ctx->tempo =ctx->default_tempo; // reset to file default value - ctx->bpm = ctx->default_bpm; // reset to file default value - ctx->global_volume = ctx->default_global_volume; // reset to file default value -} - - -void jar_xm_flip_linear_interpolation(jar_xm_context_t* ctx) { - if (ctx->module.linear_interpolation) { - ctx->module.linear_interpolation = 0; - } else { - ctx->module.linear_interpolation = 1; - } -} - -void jar_xm_table_jump(jar_xm_context_t* ctx, int table_ptr) { - for (uint16_t i = 0; i < jar_xm_get_number_of_channels(ctx); i++) { - jar_xm_cut_note(&ctx->channels[i]); - } - ctx->current_row = 0; - ctx->current_tick = 0; - if(table_ptr > 0 && table_ptr < ctx->module.length) { - ctx->current_table_index = table_ptr; - ctx->module.restart_position = table_ptr; // The reason to jump is to start a new loop or track - } else { - ctx->current_table_index = 0; - ctx->module.restart_position = 0; // The reason to jump is to start a new loop or track - ctx->tempo =ctx->default_tempo; // reset to file default value - ctx->bpm = ctx->default_bpm; // reset to file default value - ctx->global_volume = ctx->default_global_volume; // reset to file default value - }; -} - - -// TRANSLATE NOTE NUMBER INTO USER VALUE (ie. 1 = C-1, 2 = C#1, 3 = D-1 ... ) -const char* xm_note_chr(int number) { - if (number == NOTE_OFF) { - return "=="; - }; - number = number % 12; - switch(number) { - case 1: return "C-"; - case 2: return "C#"; - case 3: return "D-"; - case 4: return "D#"; - case 5: return "E-"; - case 6: return "F-"; - case 7: return "F#"; - case 8: return "G-"; - case 9: return "G#"; - case 10: return "A-"; - case 11: return "A#"; - case 12: return "B-"; - }; - return "??"; -}; - -const char* xm_octave_chr(int number) { - if (number == NOTE_OFF) { - return "="; - }; - - int number2 = number - number % 12; - int result = floor(number2 / 12) + 1; - switch(result) { - case 1: return "1"; - case 2: return "2"; - case 3: return "3"; - case 4: return "4"; - case 5: return "5"; - case 6: return "6"; - case 7: return "7"; - case 8: return "8"; - default: return "?"; /* UNKNOWN */ - }; - -}; - -// TRANSLATE NOTE EFFECT CODE INTO USER VALUE -const char* xm_effect_chr(int fx) { - switch(fx) { - case 0: return "0"; /* ZERO = NO EFFECT */ - case 1: return "1"; /* 1xx: Portamento up */ - case 2: return "2"; /* 2xx: Portamento down */ - case 3: return "3"; /* 3xx: Tone portamento */ - case 4: return "4"; /* 4xy: Vibrato */ - case 5: return "5"; /* 5xy: Tone portamento + Volume slide */ - case 6: return "6"; /* 6xy: Vibrato + Volume slide */ - case 7: return "7"; /* 7xy: Tremolo */ - case 8: return "8"; /* 8xx: Set panning */ - case 9: return "9"; /* 9xx: Sample offset */ - case 0xA: return "A";/* Axy: Volume slide */ - case 0xB: return "B";/* Bxx: Position jump */ - case 0xC: return "C";/* Cxx: Set volume */ - case 0xD: return "D";/* Dxx: Pattern break */ - case 0xE: return "E";/* EXy: Extended command */ - case 0xF: return "F";/* Fxx: Set tempo/BPM */ - case 16: return "G"; /* Gxx: Set global volume */ - case 17: return "H"; /* Hxy: Global volume slide */ - case 21: return "L"; /* Lxx: Set envelope position */ - case 25: return "P"; /* Pxy: Panning slide */ - case 27: return "R"; /* Rxy: Multi retrig note */ - case 29: return "T"; /* Txy: Tremor */ - case 33: return "X"; /* Xxy: Extra stuff */ - default: return "?"; /* UNKNOWN */ - }; -} - -#ifdef JAR_XM_RAYLIB - -#include "raylib.h" // Need RayLib API calls for the DEBUG display - -void jar_xm_debug(jar_xm_context_t *ctx) { - int size=40; - int x = 0, y = 0; - - // DEBUG VARIABLES - y += size; DrawText(TextFormat("CUR TBL = %i", ctx->current_table_index), x, y, size, WHITE); - y += size; DrawText(TextFormat("CUR PAT = %i", ctx->module.pattern_table[ctx->current_table_index]), x, y, size, WHITE); - y += size; DrawText(TextFormat("POS JMP = %d", ctx->position_jump), x, y, size, WHITE); - y += size; DrawText(TextFormat("JMP DST = %i", ctx->jump_dest), x, y, size, WHITE); - y += size; DrawText(TextFormat("PTN BRK = %d", ctx->pattern_break), x, y, size, WHITE); - y += size; DrawText(TextFormat("CUR ROW = %i", ctx->current_row), x, y, size, WHITE); - y += size; DrawText(TextFormat("JMP ROW = %i", ctx->jump_row), x, y, size, WHITE); - y += size; DrawText(TextFormat("ROW LCT = %i", ctx->row_loop_count), x, y, size, WHITE); - y += size; DrawText(TextFormat("LCT = %i", ctx->loop_count), x, y, size, WHITE); - y += size; DrawText(TextFormat("MAX LCT = %i", ctx->max_loop_count), x, y, size, WHITE); - x = size * 12; y = 0; - - y += size; DrawText(TextFormat("CUR TCK = %i", ctx->current_tick), x, y, size, WHITE); - y += size; DrawText(TextFormat("XTR TCK = %i", ctx->extra_ticks), x, y, size, WHITE); - y += size; DrawText(TextFormat("TCK/ROW = %i", ctx->tempo), x, y, size, ORANGE); - y += size; DrawText(TextFormat("SPL TCK = %f", ctx->remaining_samples_in_tick), x, y, size, WHITE); - y += size; DrawText(TextFormat("GEN SPL = %i", ctx->generated_samples), x, y, size, WHITE); - y += size * 7; - - x = 0; - size=16; - // TIMELINE OF MODULE - for (int i=0; i < ctx->module.length; i++) { - if (i == ctx->jump_dest) { - if (ctx->position_jump) { - DrawRectangle(i * size * 2, y - size, size * 2, size, GOLD); - } else { - DrawRectangle(i * size * 2, y - size, size * 2, size, BROWN); - }; - }; - if (i == ctx->current_table_index) { -// DrawText(TextFormat("%02X", ctx->current_tick), i * size * 2, y - size, size, WHITE); - DrawRectangle(i * size * 2, y, size * 2, size, RED); - DrawText(TextFormat("%02X", ctx->current_row), i * size * 2, y - size, size, YELLOW); - } else { - DrawRectangle(i * size * 2, y, size * 2, size, ORANGE); - }; - DrawText(TextFormat("%02X", ctx->module.pattern_table[i]), i * size * 2, y, size, WHITE); - }; - y += size; - - jar_xm_pattern_t* cur = ctx->module.patterns + ctx->module.pattern_table[ctx->current_table_index]; - - /* DISPLAY CURRENTLY PLAYING PATTERN */ - - x += 2 * size; - for(uint8_t i = 0; i < ctx->module.num_channels; i++) { - DrawRectangle(x, y, 8 * size, size, PURPLE); - DrawText("N", x, y, size, YELLOW); - DrawText("I", x + size * 2, y, size, YELLOW); - DrawText("V", x + size * 4, y, size, YELLOW); - DrawText("FX", x + size * 6, y, size, YELLOW); - x += 9 * size; - }; - x += size; - for (int j=(ctx->current_row - 14); j<(ctx->current_row + 15); j++) { - y += size; - x = 0; - if (j >=0 && j < (cur->num_rows)) { - DrawRectangle(x, y, size * 2, size, BROWN); - DrawText(TextFormat("%02X",j), x, y, size, WHITE); - x += 2 * size; - for(uint8_t i = 0; i < ctx->module.num_channels; i++) { - if (j==(ctx->current_row)) { - DrawRectangle(x, y, 8 * size, size, DARKGREEN); - } else { - DrawRectangle(x, y, 8 * size, size, DARKGRAY); - }; - jar_xm_pattern_slot_t *s = cur->slots + j * ctx->module.num_channels + i; - // jar_xm_channel_context_t *ch = ctx->channels + i; - if (s->note > 0) {DrawText(TextFormat("%s%s", xm_note_chr(s->note), xm_octave_chr(s->note) ), x, y, size, WHITE);} else {DrawText("...", x, y, size, GRAY);}; - if (s->instrument > 0) { - DrawText(TextFormat("%02X", s->instrument), x + size * 2, y, size, WHITE); - if (s->volume_column == 0) { - DrawText(TextFormat("%02X", 64), x + size * 4, y, size, YELLOW); - }; - } else { - DrawText("..", x + size * 2, y, size, GRAY); - if (s->volume_column == 0) { - DrawText("..", x + size * 4, y, size, GRAY); - }; - }; - if (s->volume_column > 0) {DrawText(TextFormat("%02X", (s->volume_column - 16)), x + size * 4, y, size, WHITE);}; - if (s->effect_type > 0 || s->effect_param > 0) {DrawText(TextFormat("%s%02X", xm_effect_chr(s->effect_type), s->effect_param), x + size * 6, y, size, WHITE);}; - x += 9 * size; - }; - }; - }; - -} -#endif // RayLib extension - -#endif//end of JAR_XM_IMPLEMENTATION -//------------------------------------------------------------------------------- - -#endif//end of INCLUDE_JAR_XM_H |