版本：

webrtc M59

收包流程：

AsyncUDPSocket::OnReadEvent

AllocationSequence::OnReadPacket

HandleIncomingPacket

UDPPort::OnReadPacket

Connection::OnReadPacket

P2PTransportChannel::OnReadPacke

SignalReadPacket

BaseChannel::OnPacketRead

BaseChannel::HandlePacket(該接口內(nèi)的WantsPacket會(huì)判斷rtp包的payload type是否在std::set<int> payload_types_集合內(nèi)，不在的話不會(huì)處理)

BaseChannel::OnPacketReceived

WebRtcVoiceMediaChannel::OnPacketReceived

PacketReceiver::DeliveryStatus Call::DeliverRtp

AudioReceiveStream::OnRtpPacket（video通話為VideoReceiveStream::OnRtpPacket）

Channel::OnRtpPacket

Channel::ReceivePacket

RtpReceiverImpl::IncomingRtpPacket

?NetEqImpl::InsertPacket

NetEqImpl::InsertPacketInternal

語(yǔ)音流程：

WebRtcVoiceMediaChannel::OnPacketReceived

?AudioReceiveStream::OnRtpPacket

ChannelProxy::OnRtpPacket

?Channel::OnRtpPacket

Channel::ReceivePacket

RtpReceiverImpl::IncomingRtpPacket

RTPReceiverAudio::ParseAudioCodecSpecific

Channel::OnReceivedPayloadData

AudioCodingModuleImpl::IncomingPacket

AcmReceiver::InsertPacket

ps：可參考http://www.it610.com/article/5250159.htm

視頻收包流程：

WebRtcVideoChannel2::OnPacketReceived

PacketReceiver::DeliveryStatus Call::DeliverRtp

RtpStreamReceiver::ReceivePacket

RtpReceiverImpl::IncomingRtpPacket

RTPReceiverVideo::ParseRtpPacket

RtpStreamReceiver::OnReceivedPayloadData

PacketBuffer::InsertPacket（組幀）

?RtpStreamReceiver::OnReceivedFrame（檢查是否需要請(qǐng)求關(guān)鍵幀、再查找?guī)膮⒖缄P(guān)系是否滿足）

void RtpFrameReferenceFinder::ManageFrame

void RtpFrameReferenceFinder::ManageFrameGeneric

VideoReceiveStream::OnCompleteFrame

FrameBuffer::InsertFrame (將幀插入到j(luò)itter buffter至此數(shù)據(jù)包的接收和處理已經(jīng)完成）

?

視頻解碼流程：

VideoReceiveStream::VideoReceiveStream（創(chuàng)建解碼線程在該構(gòu)造函數(shù)里面，調(diào)用VideoReceiveStream::DecodeThreadFunction）

VideoReceiveStream::Decode（ 如果有幀才會(huì)去解碼，最長(zhǎng)等待3秒，在VideoReceiveStream::Decode中有設(shè)置等待時(shí)間）

FrameBuffer::ReturnReason FrameBuffer::NextFrame (獲取幀)

VideoReceiver::Decode

VCMGenericDecoder* VCMCodecDataBase::GetDecoder（獲取解碼，如果沒(méi)有創(chuàng)建則調(diào)用）

CreateAndInitDecoder(硬解的話走的是External codec流程也就是new VCMGenericDecoder(external_dec_item->external_decoder_instance, true)）

VCMGenericDecoder::InitDecode

MediaCodecVideoDecoder::InitDecode

MediaCodecVideoDecoder::InitDecodeOnCodecThread()

VCMDecodedFrameCallback::Decoded（解碼完成）

VideoStreamDecoder::FrameToRender（收到解碼后的數(shù)據(jù)）

IncomingVideoStream::OnFrame? ?（將幀放入隊(duì)列VideoRenderFrames（incoming_video_stream_接收解碼對(duì)象通過(guò)VideoStreamDecoder::VideoStreamDecoder ->VideoReceiver::RegisterReceiveCallback(this)–>VCMDecodedFrameCallback::SetUserReceiveCallback）

IncomingVideoStream::Dequeue

?

?

ps: 這個(gè)只是一部分，其余的后續(xù)補(bǔ)充

?

轉(zhuǎn)載于:https://my.oschina.net/xgcode/blog/2120620

總結(jié)

以上是生活随笔為你收集整理的webrtc收包流程源码分析的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。