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#include "WebRTCDataChannel.hpp"
#include "WebRTCDataChannelGDNative.hpp"
#include "WebRTCLibPeerConnection.hpp"
#include "WebRTCLibDataChannel.hpp"
using namespace godot_webrtc;
godot_error _parse_ice_server(webrtc::PeerConnectionInterface::RTCConfiguration &r_config, godot::Dictionary p_server) {
godot::Variant v;
webrtc::PeerConnectionInterface::IceServer ice_server;
godot::String url;
ERR_FAIL_COND_V(!p_server.has("urls"), GODOT_ERR_INVALID_PARAMETER);
// Parse mandatory URL
v = p_server["urls"];
if (v.get_type() == godot::Variant::STRING) {
url = v;
ice_server.urls.push_back(url.utf8().get_data());
} else if (v.get_type() == godot::Variant::ARRAY) {
godot::Array names = v;
for (int j = 0; j < names.size(); j++) {
v = names[j];
ERR_FAIL_COND_V(v.get_type() != godot::Variant::STRING, GODOT_ERR_INVALID_PARAMETER);
url = v;
ice_server.urls.push_back(url.utf8().get_data());
}
} else {
ERR_FAIL_V(GODOT_ERR_INVALID_PARAMETER);
}
// Parse credentials (only meaningful for TURN, only support password)
if (p_server.has("username") && (v = p_server["username"]) && v.get_type() == godot::Variant::STRING) {
ice_server.username = (v.operator godot::String()).utf8().get_data();
}
if (p_server.has("credential") && (v = p_server["credential"]) && v.get_type() == godot::Variant::STRING) {
ice_server.password = (v.operator godot::String()).utf8().get_data();
}
r_config.servers.push_back(ice_server);
return GODOT_OK;
}
godot_error _parse_channel_config(webrtc::DataChannelInit &r_config, godot::Dictionary p_dict) {
godot::Variant v;
#define _SET_N(PROP, PNAME, TYPE) if (p_dict.has(#PROP)) { v = p_dict[#PROP]; if(v.get_type() == godot::Variant::TYPE) r_config.PNAME = v; }
#define _SET(PROP, TYPE) _SET_N(PROP, PROP, TYPE)
_SET(negotiated, BOOL);
_SET(id, INT);
_SET_N(maxPacketLifeTime, maxRetransmitTime, INT);
_SET(maxRetransmits, INT);
_SET(ordered, BOOL);
#undef _SET
if (p_dict.has("protocol") && (v = p_dict["protocol"]) && v.get_type() == godot::Variant::STRING) {
r_config.protocol = v.operator godot::String().utf8().get_data();
}
// ID makes sense only when negotiated is true (and must be set in that case)
ERR_FAIL_COND_V(r_config.negotiated ? r_config.id == -1 : r_config.id != -1, GODOT_ERR_INVALID_PARAMETER);
// Only one of maxRetransmits and maxRetransmitTime can be set on a channel.
ERR_FAIL_COND_V(r_config.maxRetransmits != -1 && r_config.maxRetransmitTime != -1, GODOT_ERR_INVALID_PARAMETER);
return GODOT_OK;
}
WebRTCLibPeerConnection::ConnectionState WebRTCLibPeerConnection::get_connection_state() const {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, STATE_CLOSED);
webrtc::PeerConnectionInterface::IceConnectionState state = peer_connection->ice_connection_state();
switch(state) {
case webrtc::PeerConnectionInterface::kIceConnectionNew:
return STATE_NEW;
case webrtc::PeerConnectionInterface::kIceConnectionChecking:
return STATE_CONNECTING;
case webrtc::PeerConnectionInterface::kIceConnectionConnected:
return STATE_CONNECTED;
case webrtc::PeerConnectionInterface::kIceConnectionCompleted:
return STATE_CONNECTED;
case webrtc::PeerConnectionInterface::kIceConnectionFailed:
return STATE_FAILED;
case webrtc::PeerConnectionInterface::kIceConnectionDisconnected:
return STATE_DISCONNECTED;
case webrtc::PeerConnectionInterface::kIceConnectionClosed:
return STATE_CLOSED;
default:
return STATE_CLOSED;
}
}
godot_error WebRTCLibPeerConnection::initialize(const godot_dictionary *p_config) {
webrtc::PeerConnectionInterface::RTCConfiguration config;
godot::Dictionary d = *(godot::Dictionary *)p_config;
godot::Variant v;
if (d.has("iceServers") && (v = d["iceServers"]) && v.get_type() == godot::Variant::ARRAY) {
godot::Array servers = v;
for (int i = 0; i < servers.size(); i++) {
v = servers[i];
ERR_FAIL_COND_V(v.get_type() != godot::Variant::DICTIONARY, GODOT_ERR_INVALID_PARAMETER);
godot_error err;
godot::Dictionary server = v;
err = _parse_ice_server(config, server);
ERR_FAIL_COND_V(err != GODOT_OK, err);
}
}
return _create_pc(config);
}
godot_object *WebRTCLibPeerConnection::create_data_channel(const char *p_channel, const godot_dictionary *p_channel_config) {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, NULL);
// Read config from dictionary
webrtc::DataChannelInit config;
godot::Dictionary d = *(godot::Dictionary *)p_channel_config;
godot_error err = _parse_channel_config(config, d);
ERR_FAIL_COND_V(err != GODOT_OK, NULL);
WebRTCLibDataChannel *wrapper = WebRTCLibDataChannel::new_data_channel(peer_connection->CreateDataChannel(p_channel, &config));
ERR_FAIL_COND_V(wrapper == NULL, NULL);
return wrapper->_owner;
}
godot_error WebRTCLibPeerConnection::create_offer() {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, GODOT_ERR_UNCONFIGURED);
peer_connection->CreateOffer(ptr_csdo, nullptr);
return GODOT_OK;
}
#define _MAKE_DESC(TYPE, SDP) webrtc::CreateSessionDescription((godot::String(TYPE) == godot::String("offer") ? webrtc::SdpType::kOffer : webrtc::SdpType::kAnswer), SDP)
godot_error WebRTCLibPeerConnection::set_remote_description(const char *type, const char *sdp) {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, GODOT_ERR_UNCONFIGURED);
std::unique_ptr<webrtc::SessionDescriptionInterface> desc = _MAKE_DESC(type, sdp);
peer_connection->SetRemoteDescription(ptr_ssdo, desc.release());
peer_connection->CreateAnswer(ptr_csdo, webrtc::PeerConnectionInterface::RTCOfferAnswerOptions());
return GODOT_OK;
}
godot_error WebRTCLibPeerConnection::set_local_description(const char *type, const char *sdp) {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, GODOT_ERR_UNCONFIGURED);
std::unique_ptr<webrtc::SessionDescriptionInterface> desc = _MAKE_DESC(type, sdp);
peer_connection->SetLocalDescription(ptr_ssdo, desc.release());
return GODOT_OK;
}
#undef _MAKE_DESC
godot_error WebRTCLibPeerConnection::add_ice_candidate(const char *sdpMidName, int sdpMlineIndexName, const char *sdpName) {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, GODOT_ERR_UNCONFIGURED);
webrtc::SdpParseError *error = nullptr;
webrtc::IceCandidateInterface *candidate = webrtc::CreateIceCandidate(
sdpMidName,
sdpMlineIndexName,
sdpName,
error);
ERR_FAIL_COND_V(error || !candidate, GODOT_ERR_INVALID_PARAMETER);
ERR_FAIL_COND_V(!peer_connection->AddIceCandidate(candidate), GODOT_FAILED);
return GODOT_OK;
}
godot_error WebRTCLibPeerConnection::poll() {
ERR_FAIL_COND_V(peer_connection.get() == nullptr, GODOT_ERR_UNCONFIGURED);
std::function<void()> signal;
while (!signal_queue.empty()) {
mutex_signal_queue->lock();
signal = signal_queue.front();
signal_queue.pop();
mutex_signal_queue->unlock();
signal();
}
return GODOT_OK;
}
void WebRTCLibPeerConnection::close() {
if (peer_connection.get() != nullptr) {
peer_connection->Close();
}
peer_connection = nullptr;
while(!signal_queue.empty()) {
signal_queue.pop();
}
}
void WebRTCLibPeerConnection::_register_methods() {
}
void WebRTCLibPeerConnection::_init() {
register_interface(&interface);
// initialize variables:
mutex_signal_queue = new std::mutex;
// create a PeerConnectionFactoryInterface:
signaling_thread = new rtc::Thread;
signaling_thread->Start();
pc_factory = webrtc::CreateModularPeerConnectionFactory(
nullptr, // rtc::Thread* network_thread,
nullptr, // rtc::Thread* worker_thread,
signaling_thread,
nullptr, // std::unique_ptr<cricket::MediaEngineInterface> media_engine,
nullptr, // std::unique_ptr<CallFactoryInterface> call_factory,
nullptr // std::unique_ptr<RtcEventLogFactoryInterface> event_log_factory
);
// Create peer connection with default configuration.
webrtc::PeerConnectionInterface::RTCConfiguration config;
_create_pc(config);
}
godot_error WebRTCLibPeerConnection::_create_pc(webrtc::PeerConnectionInterface::RTCConfiguration &config) {
ERR_FAIL_COND_V(pc_factory.get() == nullptr, GODOT_ERR_BUG);
peer_connection = nullptr;
peer_connection = pc_factory->CreatePeerConnection(config, nullptr, nullptr, &pco);
if (peer_connection.get() == nullptr) { // PeerConnection couldn't be created. Fail the method call.
ERR_PRINT("PeerConnection could not be created");
return GODOT_FAILED;
}
return GODOT_OK;
}
WebRTCLibPeerConnection::WebRTCLibPeerConnection() :
pco(this),
ptr_csdo(new rtc::RefCountedObject<GodotCSDO>(this)),
ptr_ssdo(new rtc::RefCountedObject<GodotSSDO>(this)) {
}
WebRTCLibPeerConnection::~WebRTCLibPeerConnection() {
if (_owner) {
register_interface(NULL);
}
close();
delete mutex_signal_queue;
}
void WebRTCLibPeerConnection::queue_signal(godot::String p_name, int p_argc, const godot::Variant &p_arg1, const godot::Variant &p_arg2, const godot::Variant &p_arg3) {
mutex_signal_queue->lock();
signal_queue.push(
[this, p_name, p_argc, p_arg1, p_arg2, p_arg3] {
if (p_argc == 1) {
emit_signal(p_name, p_arg1);
} else if (p_argc == 2) {
emit_signal(p_name, p_arg1, p_arg2);
} else {
emit_signal(p_name, p_arg1, p_arg2, p_arg3);
}
});
mutex_signal_queue->unlock();
}
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