1 /* 2 * libjingle 3 * Copyright 2004--2010, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_SOUND_PULSEAUDIOSOUNDSYSTEM_H_ 29 #define TALK_SOUND_PULSEAUDIOSOUNDSYSTEM_H_ 30 31 #ifdef HAVE_LIBPULSE 32 33 #include "talk/base/constructormagic.h" 34 #include "talk/sound/pulseaudiosymboltable.h" 35 #include "talk/sound/soundsysteminterface.h" 36 37 namespace cricket { 38 39 class PulseAudioInputStream; 40 class PulseAudioOutputStream; 41 class PulseAudioStream; 42 43 // Sound system implementation for PulseAudio, a cross-platform sound server 44 // (but commonly used only on Linux, which is the only platform we support 45 // it on). 46 // Init(), Terminate(), and the destructor should never be invoked concurrently, 47 // but all other methods are thread-safe. 48 class PulseAudioSoundSystem : public SoundSystemInterface { 49 friend class PulseAudioInputStream; 50 friend class PulseAudioOutputStream; 51 friend class PulseAudioStream; 52 public: 53 static SoundSystemInterface *Create() { 54 return new PulseAudioSoundSystem(); 55 } 56 57 PulseAudioSoundSystem(); 58 59 virtual ~PulseAudioSoundSystem(); 60 61 virtual bool Init(); 62 virtual void Terminate(); 63 64 virtual bool EnumeratePlaybackDevices(SoundDeviceLocatorList *devices); 65 virtual bool EnumerateCaptureDevices(SoundDeviceLocatorList *devices); 66 67 virtual bool GetDefaultPlaybackDevice(SoundDeviceLocator **device); 68 virtual bool GetDefaultCaptureDevice(SoundDeviceLocator **device); 69 70 virtual SoundOutputStreamInterface *OpenPlaybackDevice( 71 const SoundDeviceLocator *device, 72 const OpenParams ¶ms); 73 virtual SoundInputStreamInterface *OpenCaptureDevice( 74 const SoundDeviceLocator *device, 75 const OpenParams ¶ms); 76 77 virtual const char *GetName() const; 78 79 private: 80 bool IsInitialized(); 81 82 static void ConnectToPulseCallbackThunk(pa_context *context, void *userdata); 83 84 void OnConnectToPulseCallback(pa_context *context, bool *connect_done); 85 86 bool ConnectToPulse(pa_context *context); 87 88 pa_context *CreateNewConnection(); 89 90 template <typename InfoStruct> 91 bool EnumerateDevices(SoundDeviceLocatorList *devices, 92 pa_operation *(*enumerate_fn)( 93 pa_context *c, 94 void (*callback_fn)( 95 pa_context *c, 96 const InfoStruct *i, 97 int eol, 98 void *userdata), 99 void *userdata), 100 void (*callback_fn)( 101 pa_context *c, 102 const InfoStruct *i, 103 int eol, 104 void *userdata)); 105 106 static void EnumeratePlaybackDevicesCallbackThunk(pa_context *unused, 107 const pa_sink_info *info, 108 int eol, 109 void *userdata); 110 111 static void EnumerateCaptureDevicesCallbackThunk(pa_context *unused, 112 const pa_source_info *info, 113 int eol, 114 void *userdata); 115 116 void OnEnumeratePlaybackDevicesCallback( 117 SoundDeviceLocatorList *devices, 118 const pa_sink_info *info, 119 int eol); 120 121 void OnEnumerateCaptureDevicesCallback( 122 SoundDeviceLocatorList *devices, 123 const pa_source_info *info, 124 int eol); 125 126 template <const char *(pa_server_info::*field)> 127 static void GetDefaultDeviceCallbackThunk( 128 pa_context *unused, 129 const pa_server_info *info, 130 void *userdata); 131 132 template <const char *(pa_server_info::*field)> 133 void OnGetDefaultDeviceCallback( 134 const pa_server_info *info, 135 SoundDeviceLocator **device); 136 137 template <const char *(pa_server_info::*field)> 138 bool GetDefaultDevice(SoundDeviceLocator **device); 139 140 static void StreamStateChangedCallbackThunk(pa_stream *stream, 141 void *userdata); 142 143 void OnStreamStateChangedCallback(pa_stream *stream); 144 145 template <typename StreamInterface> 146 StreamInterface *OpenDevice( 147 const SoundDeviceLocator *device, 148 const OpenParams ¶ms, 149 const char *stream_name, 150 StreamInterface *(PulseAudioSoundSystem::*connect_fn)( 151 pa_stream *stream, 152 const char *dev, 153 int flags, 154 pa_stream_flags_t pa_flags, 155 int latency, 156 const pa_sample_spec &spec)); 157 158 SoundOutputStreamInterface *ConnectOutputStream( 159 pa_stream *stream, 160 const char *dev, 161 int flags, 162 pa_stream_flags_t pa_flags, 163 int latency, 164 const pa_sample_spec &spec); 165 166 SoundInputStreamInterface *ConnectInputStream( 167 pa_stream *stream, 168 const char *dev, 169 int flags, 170 pa_stream_flags_t pa_flags, 171 int latency, 172 const pa_sample_spec &spec); 173 174 bool FinishOperation(pa_operation *op); 175 176 void Lock(); 177 void Unlock(); 178 void Wait(); 179 void Signal(); 180 181 const char *LastError(); 182 183 pa_threaded_mainloop *mainloop_; 184 pa_context *context_; 185 PulseAudioSymbolTable symbol_table_; 186 187 DISALLOW_COPY_AND_ASSIGN(PulseAudioSoundSystem); 188 }; 189 190 } // namespace cricket 191 192 #endif // HAVE_LIBPULSE 193 194 #endif // TALK_SOUND_PULSEAUDIOSOUNDSYSTEM_H_ 195
