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// Copyright (c) 2013 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 CHROMEOS_AUDIO_AUDIO_PREF_HANDLER_H_
#define CHROMEOS_AUDIO_AUDIO_PREF_HANDLER_H_
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "chromeos/audio/audio_pref_observer.h"
#include "chromeos/chromeos_export.h"
class PrefRegistrySimple;
namespace chromeos {
// TODO(jennyz,rkc): This class will be removed once we remove the old Audio
// Handler code.
// Interface that handles audio preference related work, reads and writes
// audio preferences, and notifies AudioPrefObserver for audio preference
// changes.
class CHROMEOS_EXPORT AudioPrefHandler
: public base::RefCountedThreadSafe<AudioPrefHandler> {
public:
// Gets the audio output volume value from prefs.
virtual double GetOutputVolumeValue() = 0;
// Sets the output audio volume value to prefs.
virtual void SetOutputVolumeValue(double volume_percent) = 0;
// Reads the audio output mute value from prefs.
virtual bool GetOutputMuteValue() = 0;
// Sets the audio output mute value to prefs.
virtual void SetOutputMuteValue(bool mute_on) = 0;
// Reads the audio capture allowed value from prefs.
virtual bool GetAudioCaptureAllowedValue() = 0;
// Sets the audio output allowed value from prefs.
virtual bool GetAudioOutputAllowedValue() = 0;
// Adds an audio preference observer.
virtual void AddAudioPrefObserver(AudioPrefObserver* observer) = 0;
// Removes an audio preference observer.
virtual void RemoveAudioPrefObserver(AudioPrefObserver* observer) = 0;
// Creates the instance.
static AudioPrefHandler* Create(PrefService* local_state);
protected:
virtual ~AudioPrefHandler() {}
private:
friend class base::RefCountedThreadSafe<AudioPrefHandler>;
};
} // namespace chromeos
#endif // CHROMEOS_AUDIO_AUDIO_PREF_HANDLER_H_
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