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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.
#ifndef MEDIA_AUDIO_AUDIO_SYSTEM_HELPER_H_
#define MEDIA_AUDIO_AUDIO_SYSTEM_HELPER_H_
#include "media/audio/audio_system.h"
#include "media/base/media_export.h"
namespace media {
class AudioManager;
// Helper class wrapping AudioManager functionality. Methods to be called on
// audio thread only. Only audio system implementations are allowed to use it.
// See AudioSystem interface for method descriptions.
class MEDIA_EXPORT AudioSystemHelper {
public:
AudioSystemHelper(AudioManager* audio_manager);
~AudioSystemHelper();
void GetInputStreamParameters(
const std::string& device_id,
AudioSystem::OnAudioParamsCallback on_params_cb);
void GetOutputStreamParameters(
const std::string& device_id,
AudioSystem::OnAudioParamsCallback on_params_cb);
void HasInputDevices(AudioSystem::OnBoolCallback on_has_devices_cb);
void HasOutputDevices(AudioSystem::OnBoolCallback on_has_devices_cb);
void GetDeviceDescriptions(
bool for_input,
AudioSystem::OnDeviceDescriptionsCallback on_descriptions_cp);
void GetAssociatedOutputDeviceID(
const std::string& input_device_id,
AudioSystem::OnDeviceIdCallback on_device_id_cb);
void GetInputDeviceInfo(
const std::string& input_device_id,
AudioSystem::OnInputDeviceInfoCallback on_input_device_info_cb);
private:
base::Optional<AudioParameters> ComputeInputParameters(
const std::string& device_id);
base::Optional<AudioParameters> ComputeOutputParameters(
const std::string& device_id);
AudioManager* const audio_manager_;
DISALLOW_COPY_AND_ASSIGN(AudioSystemHelper);
};
} // namespace media
#endif // MEDIA_AUDIO_AUDIO_SYSTEM_HELPER_H_
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