76   RTC_DCHECK(media_channel_);  in SetOutputVolume()
79     return ssrc_ ? media_channel_->SetOutputVolume(*ssrc_, volume)  in SetOutputVolume()
80                  : media_channel_->SetDefaultOutputVolume(volume);  in SetOutputVolume()
88   if (!media_channel_ || stopped_) {  in OnSetVolume()
111   if (!media_channel_ || stopped_) {  in GetParameters()
115     return ssrc_ ? media_channel_->GetRtpReceiveParameters(*ssrc_)  in GetParameters()
116                  : media_channel_->GetDefaultRtpReceiveParameters();  in GetParameters()
124   if (media_channel_ && ssrc_.has_value() && !stopped_) {  in SetFrameDecryptor()
126       media_channel_->SetFrameDecryptor(*ssrc_, frame_decryptor_);  in SetFrameDecryptor()
141   if (media_channel_) {  in Stop()
150   RTC_DCHECK(media_channel_);  in RestartMediaChannel()
156     source_->Stop(media_channel_, ssrc_);  in RestartMediaChannel()
161   source_->Start(media_channel_, ssrc);  in RestartMediaChannel()
162   delay_->OnStart(media_channel_, ssrc.value_or(0));  in RestartMediaChannel()
167   if (!media_channel_) {  in SetupMediaChannel()
176   if (!media_channel_) {  in SetupUnsignaledMediaChannel()
221   if (!media_channel_ || !ssrc_ || stopped_) {  in GetSources()
225       RTC_FROM_HERE, [&] { return media_channel_->GetSources(*ssrc_); });  in GetSources()
234         if (media_channel_ && ssrc_.has_value() && !stopped_) {  in SetDepacketizerToDecoderFrameTransformer()
235           media_channel_->SetDepacketizerToDecoderFrameTransformer(  in SetDepacketizerToDecoderFrameTransformer()
242   if (!media_channel_ || stopped_) {  in Reconfigure()
252       ssrc_, worker_thread_, frame_decryptor_, media_channel_, stopped_);  in Reconfigure()
254   if (media_channel_ && ssrc_.has_value() && !stopped_) {  in Reconfigure()
259       media_channel_->SetDepacketizerToDecoderFrameTransformer(  in Reconfigure()
281   media_channel_ = static_cast<cricket::VoiceMediaChannel*>(media_channel);  in SetMediaChannel()