Make AudioOutputDevice restartable and reinitializable

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 87 matching lines @@
 
   // 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));
   ++buffer_index_;
 }
 
 void AudioSyncReader::Read(AudioBus* dest) {
+//  printf("--+--+--+--+-- AudioSyncReader::Read enter\n");
   ++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_;
       if (renderer_missed_callback_count_ == 100)
         LOG(WARNING) << "(log cap reached, suppressing further logs)";
     }
     dest->Zero();
+//    printf("--+--+--+--+-- AudioSyncReader::Read exit 1\n");
     return;
   }
 
   if (mute_audio_)
     dest->Zero();
   else
     output_bus_->CopyTo(dest);
+
+//  printf("--+--+--+--+-- AudioSyncReader::Read exit 2\n");
 }
 
 void AudioSyncReader::Close() {
   socket_->Close();
 }
 
 bool AudioSyncReader::Init() {
   socket_.reset(new base::CancelableSyncSocket());
   foreign_socket_.reset(new base::CancelableSyncSocket());
   return base::CancelableSyncSocket::CreatePair(socket_.get(),
@@ skipping 52 matching lines @@
                                base::TimeDelta::FromMilliseconds(1),
                                base::TimeDelta::FromMilliseconds(1000),
                                50);
     return false;
   }
 
   return true;
 }
 
 }  // namespace content