TransmitMixer: Check GetSendCodec return value.

webrtc/voice_engine/channel.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 2741 matching lines @@
 void Channel::ProcessAndEncodeAudio(const int16_t* audio_data,
                                     int sample_rate,
                                     size_t number_of_frames,
                                     size_t number_of_channels) {
   // Avoid posting as new task if sending was already stopped in StopSend().
   rtc::CritScope cs(&encoder_queue_lock_);
   if (!encoder_queue_is_active_) {
     return;
   }
   CodecInst codec;
-  GetSendCodec(codec);
+  const int result = GetSendCodec(codec);
   std::unique_ptr<AudioFrame> audio_frame(new AudioFrame());
   audio_frame->id_ = ChannelId();
-  audio_frame->sample_rate_hz_ = std::min(codec.plfreq, sample_rate);
-  audio_frame->num_channels_ = std::min(number_of_channels, codec.channels);
+  // TODO(ossu): Investigate how this could happen. b/62909493
+  if (result == 0) {
+    audio_frame->sample_rate_hz_ = std::min(codec.plfreq, sample_rate);
+    audio_frame->num_channels_ = std::min(number_of_channels, codec.channels);
+  } else {
+    audio_frame->sample_rate_hz_ = sample_rate;
+    audio_frame->num_channels_ = number_of_channels;
+    LOG(LS_WARNING) << "Unable to get send codec for channel " << ChannelId();
+    RTC_NOTREACHED();
+  }
   RemixAndResample(audio_data, number_of_frames, number_of_channels,
                    sample_rate, &input_resampler_, audio_frame.get());
   encoder_queue_->PostTask(std::unique_ptr<rtc::QueuedTask>(
       new ProcessAndEncodeAudioTask(std::move(audio_frame), this)));
 }
 
 void Channel::ProcessAndEncodeAudioOnTaskQueue(AudioFrame* audio_input) {
   RTC_DCHECK_RUN_ON(encoder_queue_);
   RTC_DCHECK_GT(audio_input->samples_per_channel_, 0);
   RTC_DCHECK_LE(audio_input->num_channels_, 2);
@@ skipping 363 matching lines @@
   int64_t min_rtt = 0;
   if (_rtpRtcpModule->RTT(remoteSSRC, &rtt, &avg_rtt, &min_rtt, &max_rtt) !=
       0) {
     return 0;
   }
   return rtt;
 }
 
 }  // namespace voe
 }  // namespace webrtc