ash/system/audio/audio_observer.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ASH_SYSTEM_AUDIO_AUDIO_OBSERVER_H_
   6 #define ASH_SYSTEM_AUDIO_AUDIO_OBSERVER_H_
   7
   8 #include "ash/ash_export.h"
   9
  10 namespace ash {
  11
  12 class ASH_EXPORT AudioObserver {
  13  public:
  14   virtual ~AudioObserver() {}
  15
  16   virtual void OnVolumeChanged(float percent) = 0;
  17   virtual void OnMuteToggled() = 0;
  18 };
  19
  20 }  // namespace ash
  21
  22 #endif  //ASH_SYSTEM_AUDIO_AUDIO_OBSERVER_H_