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// 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 <memory>
#include <string>
#include <utility>
#include "base/memory/ptr_util.h"
#include "base/single_thread_task_runner.h"
#include "base/task_runner_util.h"
#include "media/audio/audio_device_description.h"
#include "media/audio/audio_manager.h"
#include "media/base/bind_to_current_loop.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 {
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::BindOnce(std::move(on_params_cb),
GetInputParametersOnDeviceThread(
audio_manager_, device_id)));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioSystemImpl::GetInputParametersOnDeviceThread,
base::Unretained(audio_manager_), device_id),
std::move(on_params_cb));
}
void AudioSystemImpl::GetOutputStreamParameters(
const std::string& device_id,
OnAudioParamsCallback on_params_cb) const {
if (GetTaskRunner()->BelongsToCurrentThread()) {
GetTaskRunner()->PostTask(FROM_HERE,
base::BindOnce(std::move(on_params_cb),
GetOutputParametersOnDeviceThread(
audio_manager_, device_id)));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioSystemImpl::GetOutputParametersOnDeviceThread,
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::BindOnce(std::move(on_has_devices_cb),
audio_manager_->HasAudioInputDevices()));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioManager::HasAudioInputDevices,
base::Unretained(audio_manager_)),
std::move(on_has_devices_cb));
}
void AudioSystemImpl::HasOutputDevices(OnBoolCallback on_has_devices_cb) const {
if (GetTaskRunner()->BelongsToCurrentThread()) {
GetTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(std::move(on_has_devices_cb),
audio_manager_->HasAudioOutputDevices()));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioManager::HasAudioOutputDevices,
base::Unretained(audio_manager_)),
std::move(on_has_devices_cb));
}
void AudioSystemImpl::GetDeviceDescriptions(
OnDeviceDescriptionsCallback on_descriptions_cb,
bool for_input) {
if (GetTaskRunner()->BelongsToCurrentThread()) {
GetTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(std::move(on_descriptions_cb),
base::Passed(GetDeviceDescriptionsOnDeviceThread(
audio_manager_, for_input))));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioSystemImpl::GetDeviceDescriptionsOnDeviceThread,
base::Unretained(audio_manager_), for_input),
std::move(on_descriptions_cb));
}
void AudioSystemImpl::GetAssociatedOutputDeviceID(
const std::string& input_device_id,
OnDeviceIdCallback on_device_id_cb) {
if (GetTaskRunner()->BelongsToCurrentThread()) {
GetTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(std::move(on_device_id_cb),
audio_manager_->GetAssociatedOutputDeviceID(
input_device_id)));
return;
}
base::PostTaskAndReplyWithResult(
GetTaskRunner(), FROM_HERE,
base::BindOnce(&AudioManager::GetAssociatedOutputDeviceID,
base::Unretained(audio_manager_), input_device_id),
std::move(on_device_id_cb));
}
void AudioSystemImpl::GetInputDeviceInfo(
const std::string& input_device_id,
OnInputDeviceInfoCallback on_input_device_info_cb) {
// No need to bind |on_input_device_info_cb| to the current loop if we are on
// the audio thread. However, the client still expect to receive the reply
// asynchronously, so we always post GetInputDeviceInfoOnDeviceThread(), which
// will syncronously call the (bound to current loop or not) callback.
GetTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(
&AudioSystemImpl::GetInputDeviceInfoOnDeviceThread,
base::Unretained(audio_manager_), input_device_id,
GetTaskRunner()->BelongsToCurrentThread()
? std::move(on_input_device_info_cb)
: media::BindToCurrentLoop(std::move(on_input_device_info_cb))));
}
base::SingleThreadTaskRunner* AudioSystemImpl::GetTaskRunner() const {
return audio_manager_->GetTaskRunner();
}
// static
AudioParameters AudioSystemImpl::GetInputParametersOnDeviceThread(
AudioManager* audio_manager,
const std::string& device_id) {
DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
// TODO(olka): remove this when AudioManager::GetInputStreamParameters()
// returns invalid parameters if the device is not found.
if (!audio_manager->HasAudioInputDevices())
return AudioParameters();
return audio_manager->GetInputStreamParameters(device_id);
}
// static
AudioParameters AudioSystemImpl::GetOutputParametersOnDeviceThread(
AudioManager* audio_manager,
const std::string& device_id) {
DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
// TODO(olka): remove this when
// AudioManager::Get[Default]OutputStreamParameters() returns invalid
// parameters if the device is not found.
if (!audio_manager->HasAudioOutputDevices())
return AudioParameters();
return media::AudioDeviceDescription::IsDefaultDevice(device_id)
? audio_manager->GetDefaultOutputStreamParameters()
: audio_manager->GetOutputStreamParameters(device_id);
}
// static
AudioDeviceDescriptions AudioSystemImpl::GetDeviceDescriptionsOnDeviceThread(
AudioManager* audio_manager,
bool for_input) {
DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
AudioDeviceDescriptions descriptions;
if (for_input)
audio_manager->GetAudioInputDeviceDescriptions(&descriptions);
else
audio_manager->GetAudioOutputDeviceDescriptions(&descriptions);
return descriptions;
}
// static
void AudioSystemImpl::GetInputDeviceInfoOnDeviceThread(
AudioManager* audio_manager,
const std::string& input_device_id,
AudioSystem::OnInputDeviceInfoCallback on_input_device_info_cb) {
DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
const std::string associated_output_device_id =
audio_manager->GetAssociatedOutputDeviceID(input_device_id);
std::move(on_input_device_info_cb)
.Run(GetInputParametersOnDeviceThread(audio_manager, input_device_id),
associated_output_device_id.empty()
? AudioParameters()
: GetOutputParametersOnDeviceThread(audio_manager,
associated_output_device_id),
associated_output_device_id);
}
} // namespace media
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