1 // Copyright 2013 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_PULSE_AUDIO_MANAGER_PULSE_H_ 6 #define MEDIA_AUDIO_PULSE_AUDIO_MANAGER_PULSE_H_ 7 8 #include <pulse/pulseaudio.h> 9 #include <string> 10 11 #include "base/compiler_specific.h" 12 #include "base/memory/ref_counted.h" 13 #include "media/audio/audio_manager_base.h" 14 15 namespace media { 16 17 class MEDIA_EXPORT AudioManagerPulse : public AudioManagerBase { 18 public: 19 AudioManagerPulse(); 20 virtual ~AudioManagerPulse(); 21 22 static AudioManager* Create(); 23 24 // Implementation of AudioManager. 25 virtual bool HasAudioOutputDevices() OVERRIDE; 26 virtual bool HasAudioInputDevices() OVERRIDE; 27 virtual void ShowAudioInputSettings() OVERRIDE; 28 virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names) 29 OVERRIDE; 30 virtual AudioParameters GetInputStreamParameters( 31 const std::string& device_id) OVERRIDE; 32 33 // Implementation of AudioManagerBase. 34 virtual AudioOutputStream* MakeLinearOutputStream( 35 const AudioParameters& params) OVERRIDE; 36 virtual AudioOutputStream* MakeLowLatencyOutputStream( 37 const AudioParameters& params, 38 const std::string& input_device_id) OVERRIDE; 39 virtual AudioInputStream* MakeLinearInputStream( 40 const AudioParameters& params, const std::string& device_id) OVERRIDE; 41 virtual AudioInputStream* MakeLowLatencyInputStream( 42 const AudioParameters& params, const std::string& device_id) OVERRIDE; 43 44 protected: 45 virtual AudioParameters GetPreferredOutputStreamParameters( 46 const AudioParameters& input_params) OVERRIDE; 47 48 private: 49 bool Init(); 50 void DestroyPulse(); 51 52 // Callback to get the devices' info like names, used by GetInputDevices(). 53 static void InputDevicesInfoCallback(pa_context* context, 54 const pa_source_info* info, 55 int error, void* user_data); 56 static void OutputDevicesInfoCallback(pa_context* context, 57 const pa_sink_info* info, 58 int error, void* user_data); 59 60 // Callback to get the native sample rate of PulseAudio, used by 61 // GetNativeSampleRate(). 62 static void SampleRateInfoCallback(pa_context* context, 63 const pa_server_info* info, 64 void* user_data); 65 66 // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream. 67 AudioOutputStream* MakeOutputStream(const AudioParameters& params, 68 const std::string& input_device_id); 69 70 // Called by MakeLinearInputStream and MakeLowLatencyInputStream. 71 AudioInputStream* MakeInputStream(const AudioParameters& params, 72 const std::string& device_id); 73 74 // Gets the native sample rate of Pulse. 75 int GetNativeSampleRate(); 76 77 pa_threaded_mainloop* input_mainloop_; 78 pa_context* input_context_; 79 AudioDeviceNames* devices_; 80 int native_input_sample_rate_; 81 82 DISALLOW_COPY_AND_ASSIGN(AudioManagerPulse); 83 }; 84 85 } // namespace media 86 87 #endif // MEDIA_AUDIO_PULSE_AUDIO_MANAGER_PULSE_H_ 88
