Forward the number of skipped frames by the OS in audio playout.

content/browser/renderer_host/media/audio_sync_reader.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/media/audio_sync_reader.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/memory/shared_memory.h"
@@ skipping 63 matching lines @@
       LogAudioGlitchResult(AUDIO_RENDERER_AUDIO_GLITCHES) :
       LogAudioGlitchResult(AUDIO_RENDERER_NO_AUDIO_GLITCHES);
   std::string log_string =
       base::StringPrintf("ASR: number of detected audio glitches=%d",
                          static_cast<int>(renderer_missed_callback_count_));
   MediaStreamManager::SendMessageToNativeLog(log_string);
   DVLOG(1) << log_string;
 }
 
 // media::AudioOutputController::SyncReader implementations.
-void AudioSyncReader::UpdatePendingBytes(uint32 bytes) {
+void AudioSyncReader::UpdatePendingBytes(uint32_t bytes,
+                                         uint32_t frames_skipped) {
   // Zero out the entire output buffer to avoid stuttering/repeating-buffers
   // in the anomalous case if the renderer is unable to keep up with real-time.
   output_bus_->Zero();
-  socket_->Send(&bytes, sizeof(bytes));
+  uint64_t data = (static_cast<uint64_t>(bytes) << 32) | frames_skipped;

[tommi (sloooow) - chröme, 2015/12/01 13:34:25]

can we use a struct with two uint32_t's instead?

+  socket_->Send(&data, sizeof(data));
   ++buffer_index_;
 }
 
 void AudioSyncReader::Read(AudioBus* dest) {
   ++renderer_callback_count_;
   if (!WaitUntilDataIsReady()) {
     ++renderer_missed_callback_count_;
     if (renderer_missed_callback_count_ <= 100) {
       LOG(WARNING) << "AudioSyncReader::Read timed out, audio glitch count="
                    << renderer_missed_callback_count_;
@@ skipping 73 matching lines @@
                                base::TimeDelta::FromMilliseconds(1),
                                base::TimeDelta::FromMilliseconds(1000),
                                50);
     return false;
   }
 
   return true;
 }
 
 }  // namespace content