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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_
#define MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/threading/thread_checker.h"
#include "media/audio/audio_system.h"
#include "media/audio/audio_system_helper.h"
namespace media {
class AudioManager;
class MEDIA_EXPORT AudioSystemImpl : public AudioSystem {
public:
// Creates AudioSystem using the global AudioManager instance, which must be
// created prior to that.
static std::unique_ptr<AudioSystem> CreateInstance();
explicit AudioSystemImpl(AudioManager* audio_manager);
AudioSystemImpl(const AudioSystemImpl&) = delete;
AudioSystemImpl& operator=(const AudioSystemImpl&) = delete;
// AudioSystem implementation.
void GetInputStreamParameters(const std::string& device_id,
OnAudioParamsCallback on_params_cb) override;
void GetOutputStreamParameters(const std::string& device_id,
OnAudioParamsCallback on_params_cb) override;
void HasInputDevices(OnBoolCallback on_has_devices_cb) override;
void HasOutputDevices(OnBoolCallback on_has_devices_cb) override;
void GetDeviceDescriptions(
bool for_input,
OnDeviceDescriptionsCallback on_descriptions_cp) override;
void GetAssociatedOutputDeviceID(const std::string& input_device_id,
OnDeviceIdCallback on_device_id_cb) override;
void GetInputDeviceInfo(
const std::string& input_device_id,
OnInputDeviceInfoCallback on_input_device_info_cb) override;
private:
// No-op if called on helper_.GetTaskRunner() thread, otherwise binds
// |callback| to the current loop.
template <typename... Args>
base::OnceCallback<void(Args...)> MaybeBindToCurrentLoop(
base::OnceCallback<void(Args...)> callback);
THREAD_CHECKER(thread_checker_);
const raw_ptr<AudioManager> audio_manager_;
};
} // namespace media
#endif // MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_
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