media/audio/win/audio_manager_win.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 MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
   6 #define MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
   7
   8 #include <windows.h>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/gtest_prod_util.h"
  14 #include "media/audio/audio_manager_base.h"
  15
  16 namespace media {
  17
  18 // Windows implementation of the AudioManager singleton. This class is internal
  19 // to the audio output and only internal users can call methods not exposed by
  20 // the AudioManager class.
  21 class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
  22  public:
  23   AudioManagerWin();
  24   // Implementation of AudioManager.
  25   virtual bool HasAudioOutputDevices() OVERRIDE;
  26   virtual bool HasAudioInputDevices() OVERRIDE;
  27   virtual void MuteAll() OVERRIDE;
  28   virtual void UnMuteAll() OVERRIDE;
  29   virtual string16 GetAudioInputDeviceModel() OVERRIDE;
  30   virtual bool CanShowAudioInputSettings() OVERRIDE;
  31   virtual void ShowAudioInputSettings() OVERRIDE;
  32   virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
  33       OVERRIDE;
  34
  35   // Implementation of AudioManagerBase.
  36   virtual AudioOutputStream* MakeLinearOutputStream(
  37       const AudioParameters& params) OVERRIDE;
  38   virtual AudioOutputStream* MakeLowLatencyOutputStream(
  39       const AudioParameters& params) OVERRIDE;
  40   virtual AudioInputStream* MakeLinearInputStream(
  41       const AudioParameters& params, const std::string& device_id) OVERRIDE;
  42   virtual AudioInputStream* MakeLowLatencyInputStream(
  43       const AudioParameters& params, const std::string& device_id) OVERRIDE;
  44
  45  protected:
  46   virtual ~AudioManagerWin();
  47
  48  private:
  49   enum EnumerationType {
  50     kUninitializedEnumeration = 0,
  51     kMMDeviceEnumeration,
  52     kWaveEnumeration,
  53   };
  54
  55   // Allow unit test to modify the utilized enumeration API.
  56   friend class AudioInputDeviceTest;
  57
  58   EnumerationType enumeration_type_;
  59   EnumerationType enumeration_type() { return enumeration_type_; }
  60   void SetEnumerationType(EnumerationType type) {
  61     enumeration_type_ = type;
  62   }
  63
  64   // Returns a PCMWaveInAudioInputStream instance or NULL on failure.
  65   // This method converts MMDevice-style device ID to WaveIn-style device ID if
  66   // necessary.
  67   // (Please see device_enumeration_win.h for more info about the two kinds of
  68   // device IDs.)
  69   AudioInputStream* CreatePCMWaveInAudioInputStream(
  70       const AudioParameters& params,
  71       const std::string& device_id);
  72
  73   DISALLOW_COPY_AND_ASSIGN(AudioManagerWin);
  74 };
  75
  76 }  // namespace media
  77
  78 #endif  // MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_