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 <string> 9 10 #include "media/audio/audio_manager_base.h" 11 12 namespace media { 13 14 class AudioDeviceListenerWin; 15 16 // Windows implementation of the AudioManager singleton. This class is internal 17 // to the audio output and only internal users can call methods not exposed by 18 // the AudioManager class. 19 class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase { 20 public: 21 AudioManagerWin(AudioLogFactory* audio_log_factory); 22 23 // Implementation of AudioManager. 24 virtual bool HasAudioOutputDevices() OVERRIDE; 25 virtual bool HasAudioInputDevices() OVERRIDE; 26 virtual base::string16 GetAudioInputDeviceModel() OVERRIDE; 27 virtual void ShowAudioInputSettings() OVERRIDE; 28 virtual void GetAudioInputDeviceNames( 29 AudioDeviceNames* device_names) OVERRIDE; 30 virtual void GetAudioOutputDeviceNames( 31 AudioDeviceNames* device_names) OVERRIDE; 32 virtual AudioParameters GetInputStreamParameters( 33 const std::string& device_id) OVERRIDE; 34 virtual std::string GetAssociatedOutputDeviceID( 35 const std::string& input_device_id) OVERRIDE; 36 37 // Implementation of AudioManagerBase. 38 virtual AudioOutputStream* MakeLinearOutputStream( 39 const AudioParameters& params) OVERRIDE; 40 virtual AudioOutputStream* MakeLowLatencyOutputStream( 41 const AudioParameters& params, 42 const std::string& device_id, 43 const std::string& input_device_id) OVERRIDE; 44 virtual AudioInputStream* MakeLinearInputStream( 45 const AudioParameters& params, const std::string& device_id) OVERRIDE; 46 virtual AudioInputStream* MakeLowLatencyInputStream( 47 const AudioParameters& params, const std::string& device_id) OVERRIDE; 48 virtual std::string GetDefaultOutputDeviceID() OVERRIDE; 49 50 protected: 51 virtual ~AudioManagerWin(); 52 53 virtual AudioParameters GetPreferredOutputStreamParameters( 54 const std::string& output_device_id, 55 const AudioParameters& input_params) OVERRIDE; 56 57 private: 58 enum EnumerationType { 59 kUninitializedEnumeration = 0, 60 kMMDeviceEnumeration, 61 kWaveEnumeration, 62 }; 63 64 // Allow unit test to modify the utilized enumeration API. 65 friend class AudioManagerTest; 66 67 EnumerationType enumeration_type_; 68 EnumerationType enumeration_type() { return enumeration_type_; } 69 void SetEnumerationType(EnumerationType type) { 70 enumeration_type_ = type; 71 } 72 73 // Returns a PCMWaveInAudioInputStream instance or NULL on failure. 74 // This method converts MMDevice-style device ID to WaveIn-style device ID if 75 // necessary. 76 // (Please see device_enumeration_win.h for more info about the two kinds of 77 // device IDs.) 78 AudioInputStream* CreatePCMWaveInAudioInputStream( 79 const AudioParameters& params, 80 const std::string& device_id); 81 82 // Helper methods for constructing AudioDeviceListenerWin on the audio thread. 83 void CreateDeviceListener(); 84 void DestroyDeviceListener(); 85 86 void GetAudioDeviceNamesImpl(bool input, AudioDeviceNames* device_names); 87 88 // Listen for output device changes. 89 scoped_ptr<AudioDeviceListenerWin> output_device_listener_; 90 91 DISALLOW_COPY_AND_ASSIGN(AudioManagerWin); 92 }; 93 94 } // namespace media 95 96 #endif // MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_ 97
