WebRTC_2016_12_类关系

VideoCaptureModule

+ GetEncodeInterface()+ CaptureStarted()+ StartCapture()+ RegisterCaptureDataCallback()

webrtc::VideoReceiveStream

+ Start()+ Stop()+ RenderFrame()+ DeliverRtcp()+ DeliverRtp()+ SignalNetworkState()

VCMEncodedFrameCallback

EncodedImageCallback* const post_encode_callback_;

WebRtcVideoReceiveStream

+ SetRenderer()+ SetRecvCodecs()+ RenderFrame()+ Start()

webrtc::VideoReceiveStream* stream_;VideoRenderer* renderer_;

rtc::VideoSinkInterface

WebRtcVideoSendStream

webrtc::VideoSendStream* stream_;rtc::VideoSinkInterface* encoder_sink_

EncoderSink

+ OnEncoderConfigurationChanged()

VCMGenericEncoder

+ InitEncode()

+ VideoEncoder* const encoder_; //VP8/H264...VCMEncodedFrameCallback* const vcm_encoded_frame_callback_;

VideoBroadcaster

+ OnFrame() //sink_pair.sink-OnFrame(frame)

rtc::CriticalSection sinks_and_wants_lock_;

internal::VideoSendStream

vcm::VideoSender

+ RegisterSendCodec()+ RegisterExternalEncoder()+ SetChannelParameters()+ AddVideoFrame() //_encoder-Encode()+ TimeUntilNextProcess()+ Process()

VCMGenericEncoder* _encoder;VCMEncodedFrameCallback _encodedFrameCallback;EncodedImageCallback* const post_encode_callback_;

EncodedImageCallback

// Callback function which is called when an image has been encoded.+ virtual OnEncodedImage()+ OnDroppedFrame()

VideoCaptureDataCallback

+ OnIncomingCapturedFrame()

+ Start()+ Stop()+SetSource(rtc::VideoSourceInterface* source

rtc::ThreadChecker thread_checker_;rtc::TaskQueue* const worker_queue_;rtc::Event thread_sync_event_;std::unique_ptr send_stream_;std::unique_ptr vie_encoder_;

WebRtcVideoEngine2

+ CreateChannel()

WebRtcVideoChannel2

+ AddSendStream()+ AddRecvStream()+ SetCapturer()+ SetRenderer()+ SetSendRtpHeaderExtensions()+ SetRecvRtpHeaderExtensions()

WebRtcCallFactory

+ CreateCall()

WebRtc::Call

+ CreateVideoSendStream()+ CreateAudioSendStream()+ CreateVideoReceiveStream()+ Receiver()+ SignalNetworkState()

PayloadRouter

// 发送RTP数据+ OnEncodedImage() //rtp_modules_[stream_index]-SendOutgoingData

const std::vector rtp_modules_;

VideoCapturer

+ StartCapturing()+ Start()+ OnFrame() //broadcaster_.OnFrame(frame);

rtc::VideoBroadcaster broadcaster_;

//Implements rtc::VideoSourceInterface+ AddOrUpdateSink(); //encoder_sink_ = sink;+ OnFrame() override; //encoder_sink_-OnFrame(video_frame);+ SetVideoFormat()+ Start()

webrtc::Call* const call_;WebRtcVideoEncoderFactory* const external_encoder_factory_;webrtc::VideoSendStream* stream_;rtc::VideoSourceInterface* source_rtc::VideoSinkInterface* encoder_sink_;

SinkPair

VideoSinkInterface* sink;

WebRtcVideoCapturer

+ Start(); //module_-RegisterCaptureDataCallback(*this);+ OnIncomingCapturedFrame() //OnFrame()

std::unique_ptr factory_; rtc::scoped_refptr module_; int captured_frames_; std::vector capture_buffer_;

VideoSendStreamImpl

ViEEncoder* const vie_encoder_;rtc::WeakPtr weak_ptr_;PacketRouter* const packet_router_;PayloadRouter payload_router_;ProcessThread* module_process_thread_;

VideoSinkInterface

1：n

1:n

PacketReceiver

webrtc::VideoSendStream

+ Start()+ Stop()+ Input()+ DeliverRtcp()+ DeliverRtp()+ SignalNetworkState()

VideoCaptureImpl（平台封装）

VideoCaptureDataCallback* _dataCallBack;VideoCaptureFeedBack* _captureCallBack;

VideoEncoder

+ GetDefaultVp8Settings()+ GetDefaultH264Settings()+ InitEncode()+ RegisterEncodeCompleteCallback() //encoder_-RegisterEncodeCompleteCallback (vcm_encoded_frame_callback_);+ Encode() //encoder_-Encode

VideoEncoder* const encoder_; //VP8/H264...VCMEncodedFrameCallback* const vcm_encoded_frame_callback_;

Module

ViEEncoder

rtc::VideoSinkInterface* const pre_encode_callback_;ProcessThread* module_process_thread_;uint32_t encoder_start_bitrate_bps_rtc::TaskQueue encoder_queue_;vcm::VideoSender video_sender_;EncoderSink* sink_;

internal::Call

+ DeliverPacket() //send RTP/RTCP

VideoSourceBase

std::vector sinks_

internal::VideoReceiveStream

template class VideoSourceInterface