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      1 // Copyright 2014 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_WIN_AUDIO_TRAY_AUDIO_DELEGATE_WIN_H_
      6 #define ASH_SYSTEM_WIN_AUDIO_TRAY_AUDIO_DELEGATE_WIN_H_
      7 
      8 #include <audioclient.h>
      9 #include <mmdeviceapi.h>
     10 
     11 #include "ash/ash_export.h"
     12 #include "ash/system/audio/tray_audio_delegate.h"
     13 #include "base/compiler_specific.h"
     14 #include "base/win/scoped_comptr.h"
     15 
     16 namespace ash {
     17 namespace system {
     18 
     19 class ASH_EXPORT TrayAudioDelegateWin : public TrayAudioDelegate {
     20  public:
     21   virtual ~TrayAudioDelegateWin() {}
     22 
     23   // Overridden from TrayAudioDelegate.
     24   virtual void AdjustOutputVolumeToAudibleLevel() OVERRIDE;
     25   virtual int GetOutputDefaultVolumeMuteLevel() OVERRIDE;
     26   virtual int GetOutputVolumeLevel() OVERRIDE;
     27   virtual int GetActiveOutputDeviceIconId() OVERRIDE;
     28   virtual bool HasAlternativeSources() OVERRIDE;
     29   virtual bool IsOutputAudioMuted() OVERRIDE;
     30   virtual void SetOutputAudioIsMuted(bool is_muted) OVERRIDE;
     31   virtual void SetOutputVolumeLevel(int level) OVERRIDE;
     32 
     33  private:
     34   base::win::ScopedComPtr<ISimpleAudioVolume> CreateDefaultVolumeControl();
     35 };
     36 
     37 }  // namespace system
     38 }  // namespace ash
     39 
     40 #endif  // ASH_SYSTEM_WIN_AUDIO_TRAY_AUDIO_DELEGATE_WIN_H_