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(AudioLogFactory* audio_log_factory); 20 virtual ~AudioManagerPulse(); 21 22 static AudioManager* Create(AudioLogFactory* audio_log_factory); 23 24 // Implementation of AudioManager. 25 virtual bool HasAudioOutputDevices() OVERRIDE; 26 virtual bool HasAudioInputDevices() 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 35 // Implementation of AudioManagerBase. 36 virtual AudioOutputStream* MakeLinearOutputStream( 37 const AudioParameters& params) OVERRIDE; 38 virtual AudioOutputStream* MakeLowLatencyOutputStream( 39 const AudioParameters& params, 40 const std::string& device_id) OVERRIDE; 41 virtual AudioInputStream* MakeLinearInputStream( 42 const AudioParameters& params, const std::string& device_id) OVERRIDE; 43 virtual AudioInputStream* MakeLowLatencyInputStream( 44 const AudioParameters& params, const std::string& device_id) OVERRIDE; 45 46 protected: 47 virtual AudioParameters GetPreferredOutputStreamParameters( 48 const std::string& output_device_id, 49 const AudioParameters& input_params) OVERRIDE; 50 51 private: 52 bool Init(); 53 void DestroyPulse(); 54 55 void GetAudioDeviceNames(bool input, media::AudioDeviceNames* device_names); 56 57 // Callback to get the devices' info like names, used by GetInputDevices(). 58 static void InputDevicesInfoCallback(pa_context* context, 59 const pa_source_info* info, 60 int error, void* user_data); 61 static void OutputDevicesInfoCallback(pa_context* context, 62 const pa_sink_info* info, 63 int error, void* user_data); 64 65 // Callback to get the native sample rate of PulseAudio, used by 66 // GetNativeSampleRate(). 67 static void SampleRateInfoCallback(pa_context* context, 68 const pa_server_info* info, 69 void* user_data); 70 71 // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream. 72 AudioOutputStream* MakeOutputStream(const AudioParameters& params, 73 const std::string& device_id); 74 75 // Called by MakeLinearInputStream and MakeLowLatencyInputStream. 76 AudioInputStream* MakeInputStream(const AudioParameters& params, 77 const std::string& device_id); 78 79 // Gets the native sample rate of Pulse. 80 int GetNativeSampleRate(); 81 82 pa_threaded_mainloop* input_mainloop_; 83 pa_context* input_context_; 84 AudioDeviceNames* devices_; 85 int native_input_sample_rate_; 86 87 DISALLOW_COPY_AND_ASSIGN(AudioManagerPulse); 88 }; 89 90 } // namespace media 91 92 #endif // MEDIA_AUDIO_PULSE_AUDIO_MANAGER_PULSE_H_ 93
