Propagate muted info from VoE Channel to AudioConferenceMixer

webrtc/voice_engine/voe_external_media_impl.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 135 matching lines @@
         "GetAudioFrame() was called on channel that is not playing.");
     return -1;
   }
   if (desired_sample_rate_hz == -1) {
     shared_->SetLastError(VE_BAD_ARGUMENT, kTraceError,
                           "GetAudioFrame() was called with bad sample rate.");
     return -1;
   }
   frame->sample_rate_hz_ =
       desired_sample_rate_hz == 0 ? -1 : desired_sample_rate_hz;
-  return channelPtr->GetAudioFrame(channel, frame);
+  auto ret = channelPtr->GetAudioFrameWithMuted(channel, frame);
+  if (ret == MixerParticipant::AudioFrameInfo::kMuted) {
+    frame->Mute();
+  }
+  return ret == MixerParticipant::AudioFrameInfo::kError ? -1 : 0;
 }
 
 int VoEExternalMediaImpl::SetExternalMixing(int channel, bool enable) {
   WEBRTC_TRACE(kTraceApiCall, kTraceVoice,
                VoEId(shared_->instance_id(), channel),
                "SetExternalMixing(channel=%d, enable=%d)", channel, enable);
   if (!shared_->statistics().Initialized()) {
     shared_->SetLastError(VE_NOT_INITED, kTraceError);
     return -1;
   }
   voe::ChannelOwner ch = shared_->channel_manager().GetChannel(channel);
   voe::Channel* channelPtr = ch.channel();
   if (channelPtr == NULL) {
     shared_->SetLastError(VE_CHANNEL_NOT_VALID, kTraceError,
                           "SetExternalMixing() failed to locate channel");
     return -1;
   }
   return channelPtr->SetExternalMixing(enable);
 }
 
 #endif  // WEBRTC_VOICE_ENGINE_EXTERNAL_MEDIA_API
 
 }  // namespace webrtc