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// Copyright 2014 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 EXTENSIONS_SHELL_BROWSER_SHELL_AUDIO_CONTROLLER_CHROMEOS_H_
#define EXTENSIONS_SHELL_BROWSER_SHELL_AUDIO_CONTROLLER_CHROMEOS_H_
#include <stdint.h>
#include "base/macros.h"
#include "chromeos/audio/cras_audio_handler.h"
namespace extensions {
// Ensures that the "best" input and output audio devices are always active.
class ShellAudioController : public chromeos::CrasAudioHandler::AudioObserver {
public:
ShellAudioController();
~ShellAudioController() override;
// chromeos::CrasAudioHandler::Observer implementation:
void OnOutputNodeVolumeChanged(uint64_t node_id, int volume) override;
void OnOutputMuteChanged(bool mute_on, bool system_adjust) override;
void OnInputNodeGainChanged(uint64_t node_id, int gain) override;
void OnInputMuteChanged(bool mute_on) override;
void OnAudioNodesChanged() override;
void OnActiveOutputNodeChanged() override;
void OnActiveInputNodeChanged() override;
private:
// Gets the current device list from CRAS, chooses the best input and output
// device, and activates them if they aren't already active.
void ActivateDevices();
DISALLOW_COPY_AND_ASSIGN(ShellAudioController);
};
} // namespace extensions
#endif // EXTENSIONS_SHELL_BROWSER_SHELL_AUDIO_CONTROLLER_CHROMEOS_H_
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