| // Copyright 2017 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_system_impl.h" |
| |
| #include "base/memory/ptr_util.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/task_runner_util.h" |
| #include "media/audio/audio_manager.h" |
| |
| // Using base::Unretained for |audio_manager_| is safe since it is deleted after |
| // its task runner, and AudioSystemImpl is deleted on the UI thread after the IO |
| // thread has been stopped and before |audio_manager_| deletion is scheduled. |
| namespace media { |
| |
| namespace { |
| |
| AudioParameters GetInputParametersOnDeviceThread(AudioManager* audio_manager, |
| const std::string& device_id) { |
| DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread()); |
| |
| // TODO(olka): remove this when AudioManager::GetInputStreamParameters() |
| // works this way on all the platforms. |
| if (!audio_manager->HasAudioInputDevices()) |
| return AudioParameters(); |
| |
| return audio_manager->GetInputStreamParameters(device_id); |
| } |
| |
| } // namespace |
| |
| AudioSystemImpl::AudioSystemImpl(AudioManager* audio_manager) |
| : audio_manager_(audio_manager) { |
| DCHECK(audio_manager_); |
| AudioSystem::SetInstance(this); |
| } |
| |
| AudioSystemImpl::~AudioSystemImpl() { |
| AudioSystem::ClearInstance(this); |
| } |
| |
| // static |
| std::unique_ptr<AudioSystem> AudioSystemImpl::Create( |
| AudioManager* audio_manager) { |
| return base::WrapUnique(new AudioSystemImpl(audio_manager)); |
| } |
| |
| void AudioSystemImpl::GetInputStreamParameters( |
| const std::string& device_id, |
| OnAudioParamsCallback on_params_cb) const { |
| if (GetTaskRunner()->BelongsToCurrentThread()) { |
| GetTaskRunner()->PostTask( |
| FROM_HERE, base::Bind(on_params_cb, GetInputParametersOnDeviceThread( |
| audio_manager_, device_id))); |
| return; |
| } |
| base::PostTaskAndReplyWithResult( |
| GetTaskRunner(), FROM_HERE, |
| base::Bind(&GetInputParametersOnDeviceThread, |
| base::Unretained(audio_manager_), device_id), |
| std::move(on_params_cb)); |
| } |
| |
| void AudioSystemImpl::HasInputDevices(OnBoolCallback on_has_devices_cb) const { |
| if (GetTaskRunner()->BelongsToCurrentThread()) { |
| GetTaskRunner()->PostTask( |
| FROM_HERE, |
| base::Bind(on_has_devices_cb, audio_manager_->HasAudioInputDevices())); |
| return; |
| } |
| base::PostTaskAndReplyWithResult( |
| GetTaskRunner(), FROM_HERE, |
| base::Bind(&AudioManager::HasAudioInputDevices, |
| base::Unretained(audio_manager_)), |
| std::move(on_has_devices_cb)); |
| } |
| |
| AudioManager* AudioSystemImpl::GetAudioManager() const { |
| return audio_manager_; |
| } |
| |
| base::SingleThreadTaskRunner* AudioSystemImpl::GetTaskRunner() const { |
| return audio_manager_->GetTaskRunner(); |
| } |
| |
| } // namespace media |