title WebRTC Video Simulcast
Client->PeerConnection:SetLocalDescription
PeerConnection->SdpOfferAnswerHandler:SetLocalDescription
SdpOfferAnswerHandler->SdpOfferAnswerHandler:SetLocalDescription
SdpOfferAnswerHandler->SdpOfferAnswerHandler:ApplyLocalDescription
SdpOfferAnswerHandler->SdpOfferAnswerHandler:UpdateSessionState
SdpOfferAnswerHandler->SdpOfferAnswerHandler:PushdownMediaDescription
note right of SdpOfferAnswerHandler: async call BaseChannel:SetLocalContent
SdpOfferAnswerHandler->BaseChannel:SetLocalContent
BaseChannel->VideoChannel:SetLocalContent_w
VideoChannel->BaseChannel:UpdateLocalStreams_w
BaseChannel->WebRtcVideoChannel:AddSendStream(const StreamParams& sp)
WebRtcVideoChannel->WebRtcVideoSendStream:WebRtcVideoSendStream
WebRtcVideoSendStream->WebRtcVideoSendStream:CreateRtpParametersWithEncodings
标签：Simulcast,Video,SdpOfferAnswerHandler,BaseChannel,SetLocalDescriptionSdpOfferAns From： https://www.cnblogs.com/awiki/p/16656666.html