media/audio/mac/audio_manager_mac.h

   1 // Copyright (c) 2011 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 MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_
   6 #define MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "media/audio/audio_manager_base.h"
  11
  12 // Mac OS X implementation of the AudioManager singleton. This class is internal
  13 // to the audio output and only internal users can call methods not exposed by
  14 // the AudioManager class.
  15 class AudioManagerMac : public AudioManagerBase {
  16  public:
  17   AudioManagerMac();
  18
  19   // Implementation of AudioManager.
  20   virtual bool HasAudioOutputDevices() OVERRIDE;
  21   virtual bool HasAudioInputDevices() OVERRIDE;
  22   virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
  23       OVERRIDE;
  24   virtual AudioOutputStream* MakeAudioOutputStream(
  25       const AudioParameters& params) OVERRIDE;
  26   virtual AudioInputStream* MakeAudioInputStream(
  27       const AudioParameters& params, const std::string& device_id) OVERRIDE;
  28   virtual void MuteAll() OVERRIDE;
  29   virtual void UnMuteAll() OVERRIDE;
  30
  31   // Mac-only method to free the streams created by above facoty methods.
  32   // They are called internally by the respective audio stream when it has
  33   // been closed.
  34   void ReleaseOutputStream(AudioOutputStream* stream);
  35   void ReleaseInputStream(AudioInputStream* stream);
  36
  37  protected:
  38   virtual ~AudioManagerMac();
  39
  40  private:
  41
  42   // Number of currently open output streams.
  43   size_t num_output_streams_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(AudioManagerMac);
  46 };
  47
  48 #endif  // MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_