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conductor.cpp
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conductor.cpp
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#include "conductor.h"
#include "capture/v4l2_capture.h"
#include "track/swscale_track_source.h"
#include "track/v4l2dma_track_source.h"
#include "customized_video_encoder_factory.h"
#if USE_MQTT_SIGNALING
#include "signaling/mqtt_service.h"
#endif
#if USE_SIGNALR_SIGNALING
#include "signaling/signalr_service.h"
#endif
#include <api/audio_codecs/builtin_audio_decoder_factory.h>
#include <api/audio_codecs/builtin_audio_encoder_factory.h>
#include <api/create_peerconnection_factory.h>
#include <api/rtc_event_log/rtc_event_log_factory.h>
#include <api/task_queue/default_task_queue_factory.h>
#include "api/video_codecs/video_decoder_factory.h"
#include "api/video_codecs/video_decoder_factory_template.h"
#include "api/video_codecs/video_decoder_factory_template_dav1d_adapter.h"
#include "api/video_codecs/video_decoder_factory_template_libvpx_vp8_adapter.h"
#include "api/video_codecs/video_decoder_factory_template_libvpx_vp9_adapter.h"
#include "api/video_codecs/video_decoder_factory_template_open_h264_adapter.h"
#include <pc/video_track_source_proxy.h>
#include <media/engine/webrtc_media_engine.h>
#include <modules/audio_device/include/audio_device.h>
#include <modules/audio_device/include/audio_device_factory.h>
#include <modules/audio_device/linux/audio_device_alsa_linux.h>
#include <modules/audio_device/linux/audio_device_pulse_linux.h>
#include <modules/audio_processing/include/audio_processing.h>
#include <rtc_base/ssl_adapter.h>
std::shared_ptr<Conductor> Conductor::Create(Args args) {
auto ptr = std::make_shared<Conductor>(args);
if (!ptr->InitializePeerConnectionFactory()) {
std::cout << "[Conductor] Initialize PeerConnection failed!" << std::endl;
}
ptr->InitializeTracks();
ptr->InitializeSignaling(args);
if (!ptr->InitializeRecorder()) {
std::cout << "[Conductor] Recorder is not created!" << std::endl;
}
return ptr;
}
Conductor::Conductor(Args args)
: args(args),
peers_idx(0),
is_ready(false) {}
bool Conductor::InitializeSignaling(Args args) {
signaling_service_ = ([args]() -> std::shared_ptr<SignalingService> {
#if USE_MQTT_SIGNALING
return MqttService::Create(args);
#elif USE_SIGNALR_SIGNALING
return SignalrService::Create(args);
#else
return nullptr;
#endif
})();
return signaling_service_ != nullptr;
}
bool Conductor::InitializeRecorder() {
if (args.record_path.empty()) {
return false;
}
bg_recorder_ = BackgroundRecorder::CreateBackgroundRecorder(video_capture_source_);
bg_recorder_->Start();
return true;
}
void Conductor::InitializeTracks() {
if (audio_track_ == nullptr) {
auto options = peer_connection_factory_->CreateAudioSource(cricket::AudioOptions());
audio_track_ = peer_connection_factory_->CreateAudioTrack("audio_track", options.get());
}
if (video_track_ == nullptr && !args.device.empty()) {
video_capture_source_ = V4L2Capture::Create(args);
auto video_track_source = ([this]() -> rtc::scoped_refptr<rtc::AdaptedVideoTrackSource> {
if (args.enable_v4l2_dma || args.v4l2_format == "h264") {
return V4l2DmaTrackSource::Create(video_capture_source_);
} else {
return SwScaleTrackSource::Create(video_capture_source_);
}
})();
rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> video_source =
webrtc::VideoTrackSourceProxy::Create(signaling_thread_.get(),
worker_thread_.get(),
video_track_source);
video_track_ = peer_connection_factory_->CreateVideoTrack(video_source, "video_track");
}
}
void Conductor::AddTracks(rtc::scoped_refptr<webrtc::PeerConnectionInterface> peer_connection) {
if (!peer_connection->GetSenders().empty()) {
std::cout << "=> AddTracks: already add tracks." << std::endl;
return;
}
std::string stream_id = "test_stream_id";
if (audio_track_) {
auto audio_res = peer_connection->AddTrack(audio_track_, {stream_id});
if (!audio_res.ok()) {
std::cout << "=> AddTracks: audio_track_ failed"
<< audio_res.error().message() << std::endl;
}
}
if (video_track_) {
auto video_res = peer_connection->AddTrack(video_track_, {stream_id});
if (!video_res.ok()) {
std::cout << "=> AddTracks: video_track_ failed"
<< video_res.error().message() << std::endl;
}
auto video_sender_ = video_res.value();
webrtc::RtpParameters parameters = video_sender_->GetParameters();
parameters.degradation_preference = webrtc::DegradationPreference::MAINTAIN_FRAMERATE;
video_sender_->SetParameters(parameters);
}
}
bool Conductor::CreatePeerConnection() {
RefreshPeerList();
std::cout << "[Conductor] Start to create a peer connection." << std::endl;
webrtc::PeerConnectionInterface::RTCConfiguration config;
config.sdp_semantics = webrtc::SdpSemantics::kUnifiedPlan;
webrtc::PeerConnectionInterface::IceServer server;
server.uri = args.stun_url;
config.servers.push_back(server);
if (!args.turn_url.empty()) {
webrtc::PeerConnectionInterface::IceServer turn_server;
turn_server.uri = args.turn_url;
turn_server.username = args.turn_username;
turn_server.password = args.turn_password;
config.servers.push_back(turn_server);
}
peer_ = RtcPeer::Create(args, ++peers_idx);
auto result = peer_connection_factory_->CreatePeerConnectionOrError(
config, webrtc::PeerConnectionDependencies(peer_.get()));
if (result.ok()) {
peer_->SetPeer(result.MoveValue());
peer_->CreateDataChannel();
peer_->SetSignalingService(signaling_service_);
peer_->OnReadyToConnect([this](PeerState state) {
SetPeerReadyState(state.isReadyToConnect);
});
AddTracks(peer_->GetPeer());
peers_map[peers_idx] = peer_;
std::cout << "[Conductor] Peer connection("<< peers_idx <<") is created!" << std::endl;
return true;
}
std::cout << "[Conductor] Peer connection is failed to create!" << std::endl;
return false;
}
rtc::scoped_refptr<webrtc::PeerConnectionInterface> Conductor::GetPeer() const {
return peer_->GetPeer();
}
void Conductor::SetSink(rtc::VideoSinkInterface<webrtc::VideoFrame> *video_sink_obj) {
peer_->SetSink(std::move(video_sink_obj));
}
bool Conductor::InitializePeerConnectionFactory() {
rtc::InitializeSSL();
network_thread_ = rtc::Thread::CreateWithSocketServer();
worker_thread_ = rtc::Thread::Create();
signaling_thread_ = rtc::Thread::Create();
if (network_thread_->Start()) {
std::cout << "=> network thread start: success!" << std::endl;
}
if (worker_thread_->Start()) {
std::cout << "=> worker thread start: success!" << std::endl;
}
if (signaling_thread_->Start()) {
std::cout << "=> signaling thread start: success!" << std::endl;
}
webrtc::PeerConnectionFactoryDependencies dependencies;
dependencies.network_thread = network_thread_.get();;
dependencies.worker_thread = worker_thread_.get();
dependencies.signaling_thread = signaling_thread_.get();
dependencies.task_queue_factory = webrtc::CreateDefaultTaskQueueFactory();
dependencies.call_factory = webrtc::CreateCallFactory();
dependencies.event_log_factory = std::make_unique<webrtc::RtcEventLogFactory>(
dependencies.task_queue_factory.get());
dependencies.trials = std::make_unique<webrtc::FieldTrialBasedConfig>();
cricket::MediaEngineDependencies media_dependencies;
media_dependencies.task_queue_factory = dependencies.task_queue_factory.get();
media_dependencies.adm = webrtc::AudioDeviceModule::Create(
webrtc::AudioDeviceModule::kLinuxPulseAudio,
dependencies.task_queue_factory.get());
media_dependencies.audio_encoder_factory = webrtc::CreateBuiltinAudioEncoderFactory();
media_dependencies.audio_decoder_factory = webrtc::CreateBuiltinAudioDecoderFactory();
media_dependencies.audio_processing = webrtc::AudioProcessingBuilder().Create();
media_dependencies.audio_mixer = nullptr;
media_dependencies.video_encoder_factory = CreateCustomizedVideoEncoderFactory(args);
media_dependencies.video_decoder_factory = std::make_unique<webrtc::VideoDecoderFactoryTemplate<
webrtc::OpenH264DecoderTemplateAdapter,
webrtc::LibvpxVp8DecoderTemplateAdapter,
webrtc::LibvpxVp9DecoderTemplateAdapter,
webrtc::Dav1dDecoderTemplateAdapter>>();
media_dependencies.trials = dependencies.trials.get();
dependencies.media_engine = cricket::CreateMediaEngine(std::move(media_dependencies));
peer_connection_factory_ = CreateModularPeerConnectionFactory(std::move(dependencies));
if (!peer_connection_factory_) {
std::cout << "=> peer_connection_factory: failed" << std::endl;
} else {
std::cout << "=> peer_connection_factory: success!" << std::endl;
}
return peer_connection_factory_ != nullptr;
}
void Conductor::SetPeerReadyState(bool state) {
std::unique_lock<std::mutex> lock(state_mtx);
is_ready = state;
ready_state.notify_all();
}
bool Conductor::IsReady() const {
return is_ready;
}
/*
// If webrtc can not connect within a certain number of seconds, give up and wait again.
*/
void Conductor::Timeout(int second) {
sleep(second);
if (IsReady() && !peer_->IsConnected()) {
SetPeerReadyState(false);
}
}
void Conductor::BlockUntilSignal() {
std::unique_lock<std::mutex> lock(state_mtx);
ready_state.wait(lock, [this] {
return IsReady();
});
}
void Conductor::BlockUntilCompletion(int timeout) {
std::unique_lock<std::mutex> lock(state_mtx);
Timeout(timeout);
ready_state.wait(lock, [this] {
return !IsReady();
});
}
void Conductor::RefreshPeerList() {
auto pm_it = peers_map.begin();
while(pm_it != peers_map.end()) {
printf("[Conductor][Map] key:%d, value: %d =====\n", pm_it->second->GetId(), pm_it->second->IsConnected());
if (pm_it->second && !pm_it->second->IsConnected()) {
int id = pm_it->second->GetId();
std::cout << "[Conductor] peer(" << id << ") was ready to erase." << std::endl;
pm_it->second.release();
pm_it->second = nullptr;
pm_it = peers_map.erase(pm_it);
std::cout << "[Conductor] peer(" << id << ") was erased!"<< std::endl;
} else {
++pm_it;
}
}
}
Conductor::~Conductor() {
bg_recorder_->Stop();
audio_track_ = nullptr;
video_track_ = nullptr;
video_capture_source_ = nullptr;
peer_connection_factory_ = nullptr;
rtc::CleanupSSL();
std::cout << "[Conductor]: destroyed!" << std::endl;
}