Moved the fake input stream's processing onto the audio worker thread.

media/audio/fake_audio_output_stream.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 "media/audio/fake_audio_output_stream.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace media {
 
 // static
 AudioOutputStream* FakeAudioOutputStream::MakeFakeStream(
     AudioManagerBase* manager, const AudioParameters& params) {
   return new FakeAudioOutputStream(manager, params);
 }
 
 FakeAudioOutputStream::FakeAudioOutputStream(AudioManagerBase* manager,
                                              const AudioParameters& params)
     : audio_manager_(manager),
       callback_(NULL),
-      fake_consumer_(manager->GetWorkerTaskRunner(), params) {
+      fake_worker_(manager->GetWorkerTaskRunner(), params),
+      audio_bus_(AudioBus::Create(params)) {
 }
 
 FakeAudioOutputStream::~FakeAudioOutputStream() {
   DCHECK(!callback_);
 }
 
 bool FakeAudioOutputStream::Open() {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
+  audio_bus_->Zero();
   return true;
 }
 
 void FakeAudioOutputStream::Start(AudioSourceCallback* callback)  {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
   callback_ = callback;
-  fake_consumer_.Start(base::Bind(
+  fake_worker_.Start(base::Bind(
       &FakeAudioOutputStream::CallOnMoreData, base::Unretained(this)));
 }
 
 void FakeAudioOutputStream::Stop() {
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
-  fake_consumer_.Stop();
+  fake_worker_.Stop();
   callback_ = NULL;
 }
 
 void FakeAudioOutputStream::Close() {
   DCHECK(!callback_);
   DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
   audio_manager_->ReleaseOutputStream(this);
 }
 
 void FakeAudioOutputStream::SetVolume(double volume) {};
 
 void FakeAudioOutputStream::GetVolume(double* volume) {
   *volume = 0;
 };
 
-void FakeAudioOutputStream::CallOnMoreData(AudioBus* audio_bus) {
+void FakeAudioOutputStream::CallOnMoreData() {
   DCHECK(audio_manager_->GetWorkerTaskRunner()->BelongsToCurrentThread());
-  callback_->OnMoreData(audio_bus, 0);
+  callback_->OnMoreData(audio_bus_.get(), 0);
 }
 
 }  // namespace media