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) OVERRIDE; 43 virtual AudioInputStream* MakeLinearInputStream( 44 const AudioParameters& params, const std::string& device_id) OVERRIDE; 45 virtual AudioInputStream* MakeLowLatencyInputStream( 46 const AudioParameters& params, const std::string& device_id) OVERRIDE; 47 virtual std::string GetDefaultOutputDeviceID() OVERRIDE; 48 49 protected: 50 virtual ~AudioManagerWin(); 51 52 virtual AudioParameters GetPreferredOutputStreamParameters( 53 const std::string& output_device_id, 54 const AudioParameters& input_params) OVERRIDE; 55 56 private: 57 enum EnumerationType { 58 kMMDeviceEnumeration, 59 kWaveEnumeration, 60 }; 61 62 // Allow unit test to modify the utilized enumeration API. 63 friend class AudioManagerTest; 64 65 EnumerationType enumeration_type_; enumeration_type()66 EnumerationType enumeration_type() { return enumeration_type_; } SetEnumerationType(EnumerationType type)67 void SetEnumerationType(EnumerationType type) { 68 enumeration_type_ = type; 69 } 70 core_audio_supported()71 inline bool core_audio_supported() const { 72 return enumeration_type_ == kMMDeviceEnumeration; 73 } 74 75 // Returns a PCMWaveInAudioInputStream instance or NULL on failure. 76 // This method converts MMDevice-style device ID to WaveIn-style device ID if 77 // necessary. 78 // (Please see device_enumeration_win.h for more info about the two kinds of 79 // device IDs.) 80 AudioInputStream* CreatePCMWaveInAudioInputStream( 81 const AudioParameters& params, 82 const std::string& device_id); 83 84 // Helper methods for performing expensive initialization tasks on the audio 85 // thread instead of on the UI thread which AudioManager is constructed on. 86 void InitializeOnAudioThread(); 87 void ShutdownOnAudioThread(); 88 89 void GetAudioDeviceNamesImpl(bool input, AudioDeviceNames* device_names); 90 91 // Listen for output device changes. 92 scoped_ptr<AudioDeviceListenerWin> output_device_listener_; 93 94 DISALLOW_COPY_AND_ASSIGN(AudioManagerWin); 95 }; 96 97 } // namespace media 98 99 #endif // MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_ 100