Replace MessageLoopProxy with SingleThreadTaskRunner for the rest of media/.

media/audio/audio_input_controller.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/audio_input_controller.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_restrictions.h"
 #include "media/base/limits.h"
 #include "media/base/scoped_histogram_timer.h"
@@ skipping 15 matching lines @@
 }
 
 namespace media {
 
 // static
 AudioInputController::Factory* AudioInputController::factory_ = NULL;
 
 AudioInputController::AudioInputController(EventHandler* handler,
                                            SyncWriter* sync_writer,
                                            UserInputMonitor* user_input_monitor)
-    : creator_loop_(base::MessageLoopProxy::current()),
+    : creator_task_runner_(base::MessageLoopProxy::current()),
       handler_(handler),
       stream_(NULL),
       data_is_active_(false),
       state_(kEmpty),
       sync_writer_(sync_writer),
       max_volume_(0.0),
       user_input_monitor_(user_input_monitor),
       prev_key_down_count_(0) {
-  DCHECK(creator_loop_.get());
+  DCHECK(creator_task_runner_.get());
 }
 
 AudioInputController::~AudioInputController() {
   DCHECK(kClosed == state_ || kCreated == state_ || kEmpty == state_);
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::Create(
     AudioManager* audio_manager,
     EventHandler* event_handler,
     const AudioParameters& params,
     const std::string& device_id,
     UserInputMonitor* user_input_monitor) {
   DCHECK(audio_manager);
 
   if (!params.IsValid() || (params.channels() > kMaxInputChannels))
     return NULL;
 
   if (factory_) {
     return factory_->Create(
         audio_manager, event_handler, params, user_input_monitor);
   }
   scoped_refptr<AudioInputController> controller(
       new AudioInputController(event_handler, NULL, user_input_monitor));
 
-  controller->message_loop_ = audio_manager->GetMessageLoop();
+  controller->task_runner_ = audio_manager->GetTaskRunner();
 
   // Create and open a new audio input stream from the existing
   // audio-device thread.
-  if (!controller->message_loop_->PostTask(FROM_HERE,
+  if (!controller->task_runner_->PostTask(FROM_HERE,
           base::Bind(&AudioInputController::DoCreate, controller,
                      base::Unretained(audio_manager), params, device_id))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::CreateLowLatency(
     AudioManager* audio_manager,
     EventHandler* event_handler,
     const AudioParameters& params,
     const std::string& device_id,
     SyncWriter* sync_writer,
     UserInputMonitor* user_input_monitor) {
   DCHECK(audio_manager);
   DCHECK(sync_writer);
 
   if (!params.IsValid() || (params.channels() > kMaxInputChannels))
     return NULL;
 
   // Create the AudioInputController object and ensure that it runs on
   // the audio-manager thread.
   scoped_refptr<AudioInputController> controller(
       new AudioInputController(event_handler, sync_writer, user_input_monitor));
-  controller->message_loop_ = audio_manager->GetMessageLoop();
+  controller->task_runner_ = audio_manager->GetTaskRunner();
 
   // Create and open a new audio input stream from the existing
   // audio-device thread. Use the provided audio-input device.
-  if (!controller->message_loop_->PostTask(FROM_HERE,
+  if (!controller->task_runner_->PostTask(FROM_HERE,
           base::Bind(&AudioInputController::DoCreate, controller,
                      base::Unretained(audio_manager), params, device_id))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 // static
 scoped_refptr<AudioInputController> AudioInputController::CreateForStream(
-    const scoped_refptr<base::MessageLoopProxy>& message_loop,
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     EventHandler* event_handler,
     AudioInputStream* stream,
     SyncWriter* sync_writer,
     UserInputMonitor* user_input_monitor) {
   DCHECK(sync_writer);
   DCHECK(stream);
 
   // Create the AudioInputController object and ensure that it runs on
   // the audio-manager thread.
   scoped_refptr<AudioInputController> controller(
       new AudioInputController(event_handler, sync_writer, user_input_monitor));
-  controller->message_loop_ = message_loop;
+  controller->task_runner_ = task_runner;
 
   // TODO(miu): See TODO at top of file.  Until that's resolved, we need to
   // disable the error auto-detection here (since the audio mirroring
   // implementation will reliably report error and close events).  Note, of
   // course, that we're assuming CreateForStream() has been called for the audio
   // mirroring use case only.
-  if (!controller->message_loop_->PostTask(
+  if (!controller->task_runner_->PostTask(
           FROM_HERE,
           base::Bind(&AudioInputController::DoCreateForStream, controller,
                      stream, false))) {
     controller = NULL;
   }
 
   return controller;
 }
 
 void AudioInputController::Record() {
-  message_loop_->PostTask(FROM_HERE, base::Bind(
+  task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioInputController::DoRecord, this));
 }
 
 void AudioInputController::Close(const base::Closure& closed_task) {
   DCHECK(!closed_task.is_null());
-  DCHECK(creator_loop_->BelongsToCurrentThread());
+  DCHECK(creator_task_runner_->BelongsToCurrentThread());
 
-  message_loop_->PostTaskAndReply(
+  task_runner_->PostTaskAndReply(
       FROM_HERE, base::Bind(&AudioInputController::DoClose, this), closed_task);
 }
 
 void AudioInputController::SetVolume(double volume) {
-  message_loop_->PostTask(FROM_HERE, base::Bind(
+  task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioInputController::DoSetVolume, this, volume));
 }
 
 void AudioInputController::SetAutomaticGainControl(bool enabled) {
-  message_loop_->PostTask(FROM_HERE, base::Bind(
+  task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioInputController::DoSetAutomaticGainControl, this, enabled));
 }
 
 void AudioInputController::DoCreate(AudioManager* audio_manager,
                                     const AudioParameters& params,
                                     const std::string& device_id) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.CreateTime");
   // TODO(miu): See TODO at top of file.  Until that's resolved, assume all
   // platform audio input requires the |no_data_timer_| be used to auto-detect
   // errors.  In reality, probably only Windows needs to be treated as
   // unreliable here.
   DoCreateForStream(audio_manager->MakeAudioInputStream(params, device_id),
                     true);
 }
 
 void AudioInputController::DoCreateForStream(
     AudioInputStream* stream_to_control, bool enable_nodata_timer) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
 
   DCHECK(!stream_);
   stream_ = stream_to_control;
 
   if (!stream_) {
     handler_->OnError(this);
     return;
   }
 
   if (stream_ && !stream_->Open()) {
@@ skipping 19 matching lines @@
   state_ = kCreated;
   handler_->OnCreated(this);
 
   if (user_input_monitor_) {
     user_input_monitor_->EnableKeyPressMonitoring();
     prev_key_down_count_ = user_input_monitor_->GetKeyPressCount();
   }
 }
 
 void AudioInputController::DoRecord() {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.RecordTime");
 
   if (state_ != kCreated)
     return;
 
   {
     base::AutoLock auto_lock(lock_);
     state_ = kRecording;
   }
 
   if (no_data_timer_) {
     // Start the data timer. Once |kTimerResetIntervalSeconds| have passed,
     // a callback to DoCheckForNoData() is made.
     no_data_timer_->Reset();
   }
 
   stream_->Start(this);
   handler_->OnRecording(this);
 }
 
 void AudioInputController::DoClose() {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   SCOPED_UMA_HISTOGRAM_TIMER("Media.AudioInputController.CloseTime");
 
   // Delete the timer on the same thread that created it.
   no_data_timer_.reset();
 
   if (state_ != kClosed) {
     DoStopCloseAndClearStream(NULL);
     SetDataIsActive(false);
 
     if (LowLatencyMode()) {
       sync_writer_->Close();
     }
 
     state_ = kClosed;
 
     if (user_input_monitor_)
       user_input_monitor_->DisableKeyPressMonitoring();
   }
 }
 
 void AudioInputController::DoReportError() {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   handler_->OnError(this);
 }
 
 void AudioInputController::DoSetVolume(double volume) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_GE(volume, 0);
   DCHECK_LE(volume, 1.0);
 
   if (state_ != kCreated && state_ != kRecording)
     return;
 
   // Only ask for the maximum volume at first call and use cached value
   // for remaining function calls.
   if (!max_volume_) {
     max_volume_ = stream_->GetMaxVolume();
   }
 
   if (max_volume_ == 0.0) {
     DLOG(WARNING) << "Failed to access input volume control";
     return;
   }
 
   // Set the stream volume and scale to a range matched to the platform.
   stream_->SetVolume(max_volume_ * volume);
 }
 
 void AudioInputController::DoSetAutomaticGainControl(bool enabled) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_NE(state_, kRecording);
 
   // Ensure that the AGC state only can be modified before streaming starts.
   if (state_ != kCreated || state_ == kRecording)
     return;
 
   stream_->SetAutomaticGainControl(enabled);
 }
 
 void AudioInputController::DoCheckForNoData() {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (!GetDataIsActive()) {
     // The data-is-active marker will be false only if it has been more than
     // one second since a data packet was recorded. This can happen if a
     // capture device has been removed or disabled.
     handler_->OnError(this);
     return;
   }
 
   // Mark data as non-active. The flag will be re-enabled in OnData() each
@@ skipping 44 matching lines @@
 
 void AudioInputController::OnClose(AudioInputStream* stream) {
   DVLOG(1) << "AudioInputController::OnClose()";
   // TODO(satish): Sometimes the device driver closes the input stream without
   // us asking for it (may be if the device was unplugged?). Check how to handle
   // such cases here.
 }
 
 void AudioInputController::OnError(AudioInputStream* stream) {
   // Handle error on the audio-manager thread.
-  message_loop_->PostTask(FROM_HERE, base::Bind(
+  task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioInputController::DoReportError, this));
 }
 
 void AudioInputController::DoStopCloseAndClearStream(
     base::WaitableEvent* done) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
 
   // Allow calling unconditionally and bail if we don't have a stream to close.
   if (stream_ != NULL) {
     stream_->Stop();
     stream_->Close();
     stream_ = NULL;
   }
 
   // Should be last in the method, do not touch "this" from here on.
   if (done != NULL)
     done->Signal();
 }
 
 void AudioInputController::SetDataIsActive(bool enabled) {
   base::subtle::Release_Store(&data_is_active_, enabled);
 }
 
 bool AudioInputController::GetDataIsActive() {
   return (base::subtle::Acquire_Load(&data_is_active_) != false);
 }
 
 }  // namespace media