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_MAC_AUDIO_MANAGER_MAC_H_ 6 #define MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_ 7 8 #include <CoreAudio/AudioHardware.h> 9 #include <string> 10 11 #include "base/basictypes.h" 12 #include "base/compiler_specific.h" 13 #include "base/message_loop/message_loop_proxy.h" 14 #include "media/audio/audio_manager_base.h" 15 #include "media/audio/mac/aggregate_device_manager.h" 16 #include "media/audio/mac/audio_device_listener_mac.h" 17 18 namespace media { 19 20 // Mac OS X implementation of the AudioManager singleton. This class is internal 21 // to the audio output and only internal users can call methods not exposed by 22 // the AudioManager class. 23 class MEDIA_EXPORT AudioManagerMac : public AudioManagerBase { 24 public: 25 AudioManagerMac(AudioLogFactory* audio_log_factory); 26 27 // Implementation of AudioManager. 28 virtual bool HasAudioOutputDevices() OVERRIDE; 29 virtual bool HasAudioInputDevices() OVERRIDE; 30 virtual void GetAudioInputDeviceNames( 31 AudioDeviceNames* device_names) OVERRIDE; 32 virtual void GetAudioOutputDeviceNames( 33 AudioDeviceNames* device_names) OVERRIDE; 34 virtual AudioParameters GetInputStreamParameters( 35 const std::string& device_id) OVERRIDE; 36 virtual std::string GetAssociatedOutputDeviceID( 37 const std::string& input_device_id) OVERRIDE; 38 39 // Implementation of AudioManagerBase. 40 virtual AudioOutputStream* MakeLinearOutputStream( 41 const AudioParameters& params) OVERRIDE; 42 virtual AudioOutputStream* MakeLowLatencyOutputStream( 43 const AudioParameters& params, 44 const std::string& device_id, 45 const std::string& input_device_id) OVERRIDE; 46 virtual AudioInputStream* MakeLinearInputStream( 47 const AudioParameters& params, const std::string& device_id) OVERRIDE; 48 virtual AudioInputStream* MakeLowLatencyInputStream( 49 const AudioParameters& params, const std::string& device_id) OVERRIDE; 50 virtual std::string GetDefaultOutputDeviceID() OVERRIDE; 51 52 static bool GetDefaultInputDevice(AudioDeviceID* device); 53 static bool GetDefaultOutputDevice(AudioDeviceID* device); 54 static bool GetDefaultDevice(AudioDeviceID* device, bool input); 55 56 static bool GetDefaultOutputChannels(int* channels); 57 58 static bool GetDeviceChannels(AudioDeviceID device, 59 AudioObjectPropertyScope scope, 60 int* channels); 61 62 static int HardwareSampleRateForDevice(AudioDeviceID device_id); 63 static int HardwareSampleRate(); 64 65 protected: 66 virtual ~AudioManagerMac(); 67 68 virtual AudioParameters GetPreferredOutputStreamParameters( 69 const std::string& output_device_id, 70 const AudioParameters& input_params) OVERRIDE; 71 72 private: 73 bool HasUnifiedDefaultIO(); 74 75 // Helper methods for constructing AudioDeviceListenerMac on the audio thread. 76 void CreateDeviceListener(); 77 void DestroyDeviceListener(); 78 79 int ChooseBufferSize(int output_sample_rate); 80 81 // Notify streams of a device change if the default output device or its 82 // sample rate has changed, otherwise does nothing. 83 void HandleDeviceChanges(); 84 85 scoped_ptr<AudioDeviceListenerMac> output_device_listener_; 86 87 // Track the output sample-rate and the default output device 88 // so we can intelligently handle device notifications only when necessary. 89 int current_sample_rate_; 90 AudioDeviceID current_output_device_; 91 92 AggregateDeviceManager aggregate_device_manager_; 93 94 DISALLOW_COPY_AND_ASSIGN(AudioManagerMac); 95 }; 96 97 } // namespace media 98 99 #endif // MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_ 100
