Alc/portaudio.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  *  Boston, MA  02111-1307, USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include "alMain.h"
  27 #include "AL/al.h"
  28 #include "AL/alc.h"
  29 #ifdef HAVE_DLFCN_H
  30 #include <dlfcn.h>
  31 #endif
  32
  33 #include <portaudio.h>
  34
  35 static void *pa_handle;
  36 #define MAKE_FUNC(x) static typeof(x) * p##x
  37 MAKE_FUNC(Pa_Initialize);
  38 MAKE_FUNC(Pa_Terminate);
  39 MAKE_FUNC(Pa_GetErrorText);
  40 MAKE_FUNC(Pa_StartStream);
  41 MAKE_FUNC(Pa_StopStream);
  42 MAKE_FUNC(Pa_OpenStream);
  43 MAKE_FUNC(Pa_CloseStream);
  44 MAKE_FUNC(Pa_GetDefaultOutputDevice);
  45 MAKE_FUNC(Pa_GetStreamInfo);
  46 #undef MAKE_FUNC
  47
  48
  49 static const ALCchar pa_device[] = "PortAudio Default";
  50
  51
  52 void *pa_load(void)
  53 {
  54     if(!pa_handle)
  55     {
  56         PaError err;
  57
  58 #ifdef _WIN32
  59         pa_handle = LoadLibrary("portaudio.dll");
  60 #define LOAD_FUNC(x) do { \
  61     p##x = (typeof(p##x))GetProcAddress(pa_handle, #x); \
  62     if(!(p##x)) { \
  63         AL_PRINT("Could not load %s from portaudio.dll\n", #x); \
  64         FreeLibrary(pa_handle); \
  65         pa_handle = NULL; \
  66         return NULL; \
  67     } \
  68 } while(0)
  69
  70 #elif defined(HAVE_DLFCN_H)
  71
  72     const char *str;
  73 #if defined(__APPLE__) && defined(__MACH__)
  74 # define PALIB "libportaudio.2.dylib"
  75 #else
  76 # define PALIB "libportaudio.so.2"
  77 #endif
  78         pa_handle = dlopen(PALIB, RTLD_NOW);
  79         dlerror();
  80
  81 #define LOAD_FUNC(f) do { \
  82     p##f = (typeof(f)*)dlsym(pa_handle, #f); \
  83     if((str=dlerror()) != NULL) \
  84     { \
  85         dlclose(pa_handle); \
  86         pa_handle = NULL; \
  87         AL_PRINT("Could not load %s from "PALIB": %s\n", #f, str); \
  88         return NULL; \
  89     } \
  90 } while(0)
  91
  92 #else
  93         pa_handle = (void*)0xDEADBEEF;
  94 #define LOAD_FUNC(f) p##f = f
  95 #endif
  96
  97         if(!pa_handle)
  98             return NULL;
  99
 100 LOAD_FUNC(Pa_Initialize);
 101 LOAD_FUNC(Pa_Terminate);
 102 LOAD_FUNC(Pa_GetErrorText);
 103 LOAD_FUNC(Pa_StartStream);
 104 LOAD_FUNC(Pa_StopStream);
 105 LOAD_FUNC(Pa_OpenStream);
 106 LOAD_FUNC(Pa_CloseStream);
 107 LOAD_FUNC(Pa_GetDefaultOutputDevice);
 108 LOAD_FUNC(Pa_GetStreamInfo);
 109
 110 #undef LOAD_FUNC
 111
 112         if((err=pPa_Initialize()) != paNoError)
 113         {
 114             AL_PRINT("Pa_Initialize() returned an error: %s\n", pPa_GetErrorText(err));
 115 #ifdef _WIN32
 116             FreeLibrary(pa_handle);
 117 #elif defined(HAVE_DLFCN_H)
 118             dlclose(pa_handle);
 119 #endif
 120             pa_handle = NULL;
 121             return NULL;
 122         }
 123     }
 124     return pa_handle;
 125 }
 126
 127
 128 typedef struct {
 129     PaStream *stream;
 130     ALuint update_size;
 131
 132     RingBuffer *ring;
 133 } pa_data;
 134
 135
 136 static int pa_callback(const void *inputBuffer, void *outputBuffer,
 137                        unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
 138                        const PaStreamCallbackFlags statusFlags, void *userData)
 139 {
 140     ALCdevice *device = (ALCdevice*)userData;
 141
 142     (void)inputBuffer;
 143     (void)timeInfo;
 144     (void)statusFlags;
 145
 146     aluMixData(device, outputBuffer, framesPerBuffer);
 147     return 0;
 148 }
 149
 150 static int pa_capture_cb(const void *inputBuffer, void *outputBuffer,
 151                          unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
 152                          const PaStreamCallbackFlags statusFlags, void *userData)
 153 {
 154     ALCdevice *device = (ALCdevice*)userData;
 155     pa_data *data = (pa_data*)device->ExtraData;
 156
 157     (void)outputBuffer;
 158     (void)timeInfo;
 159     (void)statusFlags;
 160
 161     WriteRingBuffer(data->ring, inputBuffer, framesPerBuffer);
 162     return 0;
 163 }
 164
 165
 166 static ALCboolean pa_open_playback(ALCdevice *device, const ALCchar *deviceName)
 167 {
 168     const PaStreamInfo *streamInfo;
 169     PaStreamParameters outParams;
 170     pa_data *data;
 171     PaError err;
 172
 173     if(!deviceName)
 174         deviceName = pa_device;
 175     else if(strcmp(deviceName, pa_device) != 0)
 176         return ALC_FALSE;
 177
 178     if(!pa_load())
 179         return ALC_FALSE;
 180
 181     data = (pa_data*)calloc(1, sizeof(pa_data));
 182     data->update_size = device->UpdateSize;
 183
 184     device->ExtraData = data;
 185
 186     outParams.device = GetConfigValueInt("port", "device", -1);
 187     if(outParams.device < 0)
 188         outParams.device = pPa_GetDefaultOutputDevice();
 189     outParams.suggestedLatency = (device->UpdateSize*device->NumUpdates) /
 190                                  (float)device->Frequency;
 191     outParams.hostApiSpecificStreamInfo = NULL;
 192
 193     switch(device->FmtType)
 194     {
 195         case DevFmtByte:
 196             outParams.sampleFormat = paInt8;
 197             break;
 198         case DevFmtUByte:
 199             outParams.sampleFormat = paUInt8;
 200             break;
 201         case DevFmtUShort:
 202             device->FmtType = DevFmtShort;
 203             /* fall-through */
 204         case DevFmtShort:
 205             outParams.sampleFormat = paInt16;
 206             break;
 207         case DevFmtFloat:
 208             outParams.sampleFormat = paFloat32;
 209             break;
 210     }
 211     outParams.channelCount = ChannelsFromDevFmt(device->FmtChans);
 212
 213     SetDefaultChannelOrder(device);
 214
 215     err = pPa_OpenStream(&data->stream, NULL, &outParams, device->Frequency,
 216                          device->UpdateSize, paNoFlag, pa_callback, device);
 217     if(err != paNoError)
 218     {
 219         AL_PRINT("Pa_OpenStream() returned an error: %s\n", pPa_GetErrorText(err));
 220         device->ExtraData = NULL;
 221         free(data);
 222         return ALC_FALSE;
 223     }
 224     streamInfo = pPa_GetStreamInfo(data->stream);
 225
 226     device->szDeviceName = strdup(deviceName);
 227     device->Frequency = streamInfo->sampleRate;
 228
 229     return ALC_TRUE;
 230 }
 231
 232 static void pa_close_playback(ALCdevice *device)
 233 {
 234     pa_data *data = (pa_data*)device->ExtraData;
 235     PaError err;
 236
 237     err = pPa_CloseStream(data->stream);
 238     if(err != paNoError)
 239         AL_PRINT("Error closing stream: %s\n", pPa_GetErrorText(err));
 240
 241     free(data);
 242     device->ExtraData = NULL;
 243 }
 244
 245 static ALCboolean pa_reset_playback(ALCdevice *device)
 246 {
 247     pa_data *data = (pa_data*)device->ExtraData;
 248     const PaStreamInfo *streamInfo;
 249     PaError err;
 250
 251     streamInfo = pPa_GetStreamInfo(data->stream);
 252     device->Frequency = streamInfo->sampleRate;
 253     device->UpdateSize = data->update_size;
 254
 255     err = pPa_StartStream(data->stream);
 256     if(err != paNoError)
 257     {
 258         AL_PRINT("Pa_StartStream() returned an error: %s\n", pPa_GetErrorText(err));
 259         return ALC_FALSE;
 260     }
 261
 262     return ALC_TRUE;
 263 }
 264
 265 static void pa_stop_playback(ALCdevice *device)
 266 {
 267     pa_data *data = (pa_data*)device->ExtraData;
 268     PaError err;
 269
 270     err = pPa_StopStream(data->stream);
 271     if(err != paNoError)
 272         AL_PRINT("Error stopping stream: %s\n", pPa_GetErrorText(err));
 273 }
 274
 275
 276 static ALCboolean pa_open_capture(ALCdevice *device, const ALCchar *deviceName)
 277 {
 278     PaStreamParameters inParams;
 279     ALuint frame_size;
 280     pa_data *data;
 281     PaError err;
 282
 283     if(!deviceName)
 284         deviceName = pa_device;
 285     else if(strcmp(deviceName, pa_device) != 0)
 286         return ALC_FALSE;
 287
 288     if(!pa_load())
 289         return ALC_FALSE;
 290
 291     data = (pa_data*)calloc(1, sizeof(pa_data));
 292     if(data == NULL)
 293     {
 294         alcSetError(device, ALC_OUT_OF_MEMORY);
 295         return ALC_FALSE;
 296     }
 297
 298     frame_size = FrameSizeFromDevFmt(device->FmtChans, device->FmtType);
 299     data->ring = CreateRingBuffer(frame_size, device->UpdateSize*device->NumUpdates);
 300     if(data->ring == NULL)
 301     {
 302         alcSetError(device, ALC_OUT_OF_MEMORY);
 303         goto error;
 304     }
 305
 306     inParams.device = GetConfigValueInt("port", "capture", -1);
 307     if(inParams.device < 0)
 308         inParams.device = pPa_GetDefaultOutputDevice();
 309     inParams.suggestedLatency = 0.0f;
 310     inParams.hostApiSpecificStreamInfo = NULL;
 311
 312     switch(device->FmtType)
 313     {
 314         case DevFmtByte:
 315             inParams.sampleFormat = paInt8;
 316             break;
 317         case DevFmtUByte:
 318             inParams.sampleFormat = paUInt8;
 319             break;
 320         case DevFmtShort:
 321             inParams.sampleFormat = paInt16;
 322             break;
 323         case DevFmtFloat:
 324             inParams.sampleFormat = paFloat32;
 325             break;
 326         case DevFmtUShort:
 327             AL_PRINT("Unsigned short not supported\n");
 328             goto error;
 329     }
 330     inParams.channelCount = ChannelsFromDevFmt(device->FmtChans);
 331
 332     err = pPa_OpenStream(&data->stream, &inParams, NULL, device->Frequency,
 333                          paFramesPerBufferUnspecified, paNoFlag, pa_capture_cb, device);
 334     if(err != paNoError)
 335     {
 336         AL_PRINT("Pa_OpenStream() returned an error: %s\n", pPa_GetErrorText(err));
 337         goto error;
 338     }
 339
 340     device->szDeviceName = strdup(deviceName);
 341
 342     device->ExtraData = data;
 343     return ALC_TRUE;
 344
 345 error:
 346     DestroyRingBuffer(data->ring);
 347     free(data);
 348     return ALC_FALSE;
 349 }
 350
 351 static void pa_close_capture(ALCdevice *device)
 352 {
 353     pa_data *data = (pa_data*)device->ExtraData;
 354     PaError err;
 355
 356     err = pPa_CloseStream(data->stream);
 357     if(err != paNoError)
 358         AL_PRINT("Error closing stream: %s\n", pPa_GetErrorText(err));
 359
 360     free(data);
 361     device->ExtraData = NULL;
 362 }
 363
 364 static void pa_start_capture(ALCdevice *device)
 365 {
 366     pa_data *data = device->ExtraData;
 367     PaError err;
 368
 369     err = pPa_StartStream(data->stream);
 370     if(err != paNoError)
 371         AL_PRINT("Error starting stream: %s\n", pPa_GetErrorText(err));
 372 }
 373
 374 static void pa_stop_capture(ALCdevice *device)
 375 {
 376     pa_data *data = (pa_data*)device->ExtraData;
 377     PaError err;
 378
 379     err = pPa_StopStream(data->stream);
 380     if(err != paNoError)
 381         AL_PRINT("Error stopping stream: %s\n", pPa_GetErrorText(err));
 382 }
 383
 384 static void pa_capture_samples(ALCdevice *device, ALCvoid *buffer, ALCuint samples)
 385 {
 386     pa_data *data = device->ExtraData;
 387     if(samples <= (ALCuint)RingBufferSize(data->ring))
 388         ReadRingBuffer(data->ring, buffer, samples);
 389     else
 390         alcSetError(device, ALC_INVALID_VALUE);
 391 }
 392
 393 static ALCuint pa_available_samples(ALCdevice *device)
 394 {
 395     pa_data *data = device->ExtraData;
 396     return RingBufferSize(data->ring);
 397 }
 398
 399
 400 static const BackendFuncs pa_funcs = {
 401     pa_open_playback,
 402     pa_close_playback,
 403     pa_reset_playback,
 404     pa_stop_playback,
 405     pa_open_capture,
 406     pa_close_capture,
 407     pa_start_capture,
 408     pa_stop_capture,
 409     pa_capture_samples,
 410     pa_available_samples
 411 };
 412
 413 void alc_pa_init(BackendFuncs *func_list)
 414 {
 415     *func_list = pa_funcs;
 416 }
 417
 418 void alc_pa_deinit(void)
 419 {
 420     if(pa_handle)
 421     {
 422         pPa_Terminate();
 423 #ifdef _WIN32
 424         FreeLibrary(pa_handle);
 425 #elif defined(HAVE_DLFCN_H)
 426         dlclose(pa_handle);
 427 #endif
 428         pa_handle = NULL;
 429     }
 430 }
 431
 432 void alc_pa_probe(int type)
 433 {
 434     if(!pa_load()) return;
 435
 436     if(type == DEVICE_PROBE)
 437         AppendDeviceList(pa_device);
 438     else if(type == ALL_DEVICE_PROBE)
 439         AppendAllDeviceList(pa_device);
 440     else if(type == CAPTURE_DEVICE_PROBE)
 441         AppendCaptureDeviceList(pa_device);
 442 }