webrtc_c_native_local_sdp_0">webrtc c++ native 获取local sdp流程

一、初始化线程

    rtc::WinsockInitializer winsock_init;rtc::Win32SocketServer w32_ss;rtc::Win32Thread w32_thread(&w32_ss);rtc::ThreadManager::Instance()->SetCurrentThread(&w32_thread);

二、创建peer_connection_factory

    peer_connection_factory_ = webrtc::CreatePeerConnectionFactory(nullptr /* network_thread */, nullptr /* worker_thread */,nullptr /* signaling_thread */, nullptr /* default_adm */,webrtc::CreateBuiltinAudioEncoderFactory(),webrtc::CreateBuiltinAudioDecoderFactory(),webrtc::CreateBuiltinVideoEncoderFactory(),webrtc::CreateBuiltinVideoDecoderFactory(), nullptr /* audio_mixer */,nullptr /* audio_processing */);

三、创建peer_connection

    peer_connection_ = peer_connection_factory_->CreatePeerConnection(config, nullptr, nullptr, this);

四、创建audio track并add进入peer_connection

    rtc::scoped_refptr<webrtc::AudioTrackInterface> audio_track(peer_connection_factory_->CreateAudioTrack(kAudioLabel, peer_connection_factory_->CreateAudioSource(cricket::AudioOptions())));auto result_or_error = peer_connection_->AddTrack(audio_track, { kStreamId });

五、创建video track并add进入peer_connection

rtc::scoped_refptr<CapturerTrackSource> video_device = CapturerTrackSource::Create();rtc::scoped_refptr<webrtc::VideoTrackInterface> video_track_(peer_connection_factory_->CreateVideoTrack(kVideoLabel, video_device));result_or_error = peer_connection_->AddTrack(video_track_, { kStreamId });

六、创建offer

    peer_connection_->CreateOffer(conductor, webrtc::PeerConnectionInterface::RTCOfferAnswerOptions());

七、获取sdp

    void OnSuccess(webrtc::SessionDescriptionInterface* desc) override {printf("xxxxxxxxxxxxxxxxxxxxxxx\n");std::string sdp;desc->ToString(&sdp);}

八、常见问题

1. 初始化线程最好放到main函数(主线程中),否则OnSuccess回调无法调用