RTCConfiguration::
MediaConfig::Video::suspend_below_min_bitrate
PeerConnection::CreateVoiceChannel
PeerConnection::CreateVideoChannel
WebRtcVideoEngine::CreateMediaChannel
WebRtcVideoChannel::video_config_ = config.video
WebRtcVideoChannel::AddSendStream
VideoSendStream::Config.suspend_below_min_bitrate = VideoRateControlConfig::video_config_.suspend_below_min_bitrate;
WebRtcVideoSendStream::WebRtcVideoSendStream
VideoSendStreamParameters = std::move(config), options, max_bitrate_bps, codec_settings)
VideoSendStreamImpl::StartupVideoSendStream()
VideoSendStreamImpl::GetAllocationConfig
MediaStreamAllocationConfig::enforce_min_bitrate = !config_->suspend_below_min_bitrate
// suspend_below_min_bitrate引擎里面转化为enforce_min_bitrate 字段
bitrate_allocator.cc
// 带宽评估改变后，会重新