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(aluBytesFromFormat(device->Format))
 194     {
 195         case 1:
 196             outParams.sampleFormat = paUInt8;
 197             break;
 198         case 2:
 199             outParams.sampleFormat = paInt16;
 200             break;
 201         case 4:
 202             outParams.sampleFormat = paFloat32;
 203             break;
 204         default:
 205             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 206             device->ExtraData = NULL;
 207             free(data);
 208             return ALC_FALSE;
 209     }
 210     outParams.channelCount = aluChannelsFromFormat(device->Format);
 211
 212     SetDefaultChannelOrder(device);
 213
 214     err = pPa_OpenStream(&data->stream, NULL, &outParams, device->Frequency,
 215                          device->UpdateSize, paNoFlag, pa_callback, device);
 216     if(err != paNoError)
 217     {
 218         AL_PRINT("Pa_OpenStream() returned an error: %s\n", pPa_GetErrorText(err));
 219         device->ExtraData = NULL;
 220         free(data);
 221         return ALC_FALSE;
 222     }
 223     streamInfo = pPa_GetStreamInfo(data->stream);
 224
 225     device->szDeviceName = strdup(deviceName);
 226     device->Frequency = streamInfo->sampleRate;
 227
 228     return ALC_TRUE;
 229 }
 230
 231 static void pa_close_playback(ALCdevice *device)
 232 {
 233     pa_data *data = (pa_data*)device->ExtraData;
 234     PaError err;
 235
 236     err = pPa_CloseStream(data->stream);
 237     if(err != paNoError)
 238         AL_PRINT("Error closing stream: %s\n", pPa_GetErrorText(err));
 239
 240     free(data);
 241     device->ExtraData = NULL;
 242 }
 243
 244 static ALCboolean pa_reset_playback(ALCdevice *device)
 245 {
 246     pa_data *data = (pa_data*)device->ExtraData;
 247     const PaStreamInfo *streamInfo;
 248     PaError err;
 249
 250     streamInfo = pPa_GetStreamInfo(data->stream);
 251     device->Frequency = streamInfo->sampleRate;
 252     device->UpdateSize = data->update_size;
 253
 254     err = pPa_StartStream(data->stream);
 255     if(err != paNoError)
 256     {
 257         AL_PRINT("Pa_StartStream() returned an error: %s\n", pPa_GetErrorText(err));
 258         return ALC_FALSE;
 259     }
 260
 261     return ALC_TRUE;
 262 }
 263
 264 static void pa_stop_playback(ALCdevice *device)
 265 {
 266     pa_data *data = (pa_data*)device->ExtraData;
 267     PaError err;
 268
 269     err = pPa_StopStream(data->stream);
 270     if(err != paNoError)
 271         AL_PRINT("Error stopping stream: %s\n", pPa_GetErrorText(err));
 272 }
 273
 274
 275 static ALCboolean pa_open_capture(ALCdevice *device, const ALCchar *deviceName)
 276 {
 277     PaStreamParameters inParams;
 278     ALuint frame_size;
 279     pa_data *data;
 280     PaError err;
 281
 282     if(!deviceName)
 283         deviceName = pa_device;
 284     else if(strcmp(deviceName, pa_device) != 0)
 285         return ALC_FALSE;
 286
 287     if(!pa_load())
 288         return ALC_FALSE;
 289
 290     data = (pa_data*)calloc(1, sizeof(pa_data));
 291     if(data == NULL)
 292     {
 293         alcSetError(device, ALC_OUT_OF_MEMORY);
 294         return ALC_FALSE;
 295     }
 296
 297     frame_size = aluFrameSizeFromFormat(device->Format);
 298     data->ring = CreateRingBuffer(frame_size, device->UpdateSize*device->NumUpdates);
 299     if(data->ring == NULL)
 300     {
 301         alcSetError(device, ALC_OUT_OF_MEMORY);
 302         goto error;
 303     }
 304
 305     inParams.device = GetConfigValueInt("port", "capture", -1);
 306     if(inParams.device < 0)
 307         inParams.device = pPa_GetDefaultOutputDevice();
 308     inParams.suggestedLatency = 0.0f;
 309     inParams.hostApiSpecificStreamInfo = NULL;
 310
 311     switch(aluBytesFromFormat(device->Format))
 312     {
 313         case 1:
 314             inParams.sampleFormat = paUInt8;
 315             break;
 316         case 2:
 317             inParams.sampleFormat = paInt16;
 318             break;
 319         case 4:
 320             inParams.sampleFormat = paFloat32;
 321             break;
 322         default:
 323             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 324             goto error;
 325     }
 326     inParams.channelCount = aluChannelsFromFormat(device->Format);
 327
 328     err = pPa_OpenStream(&data->stream, &inParams, NULL, device->Frequency,
 329                          paFramesPerBufferUnspecified, paNoFlag, pa_capture_cb, device);
 330     if(err != paNoError)
 331     {
 332         AL_PRINT("Pa_OpenStream() returned an error: %s\n", pPa_GetErrorText(err));
 333         goto error;
 334     }
 335
 336     device->szDeviceName = strdup(deviceName);
 337
 338     device->ExtraData = data;
 339     return ALC_TRUE;
 340
 341 error:
 342     DestroyRingBuffer(data->ring);
 343     free(data);
 344     return ALC_FALSE;
 345 }
 346
 347 static void pa_close_capture(ALCdevice *device)
 348 {
 349     pa_data *data = (pa_data*)device->ExtraData;
 350     PaError err;
 351
 352     err = pPa_CloseStream(data->stream);
 353     if(err != paNoError)
 354         AL_PRINT("Error closing stream: %s\n", pPa_GetErrorText(err));
 355
 356     free(data);
 357     device->ExtraData = NULL;
 358 }
 359
 360 static void pa_start_capture(ALCdevice *device)
 361 {
 362     pa_data *data = device->ExtraData;
 363     PaError err;
 364
 365     err = pPa_StartStream(data->stream);
 366     if(err != paNoError)
 367         AL_PRINT("Error starting stream: %s\n", pPa_GetErrorText(err));
 368 }
 369
 370 static void pa_stop_capture(ALCdevice *device)
 371 {
 372     pa_data *data = (pa_data*)device->ExtraData;
 373     PaError err;
 374
 375     err = pPa_StopStream(data->stream);
 376     if(err != paNoError)
 377         AL_PRINT("Error stopping stream: %s\n", pPa_GetErrorText(err));
 378 }
 379
 380 static void pa_capture_samples(ALCdevice *device, ALCvoid *buffer, ALCuint samples)
 381 {
 382     pa_data *data = device->ExtraData;
 383     if(samples <= (ALCuint)RingBufferSize(data->ring))
 384         ReadRingBuffer(data->ring, buffer, samples);
 385     else
 386         alcSetError(device, ALC_INVALID_VALUE);
 387 }
 388
 389 static ALCuint pa_available_samples(ALCdevice *device)
 390 {
 391     pa_data *data = device->ExtraData;
 392     return RingBufferSize(data->ring);
 393 }
 394
 395
 396 static const BackendFuncs pa_funcs = {
 397     pa_open_playback,
 398     pa_close_playback,
 399     pa_reset_playback,
 400     pa_stop_playback,
 401     pa_open_capture,
 402     pa_close_capture,
 403     pa_start_capture,
 404     pa_stop_capture,
 405     pa_capture_samples,
 406     pa_available_samples
 407 };
 408
 409 void alc_pa_init(BackendFuncs *func_list)
 410 {
 411     *func_list = pa_funcs;
 412 }
 413
 414 void alc_pa_deinit(void)
 415 {
 416     if(pa_handle)
 417     {
 418         pPa_Terminate();
 419 #ifdef _WIN32
 420         FreeLibrary(pa_handle);
 421 #elif defined(HAVE_DLFCN_H)
 422         dlclose(pa_handle);
 423 #endif
 424         pa_handle = NULL;
 425     }
 426 }
 427
 428 void alc_pa_probe(int type)
 429 {
 430     if(!pa_load()) return;
 431
 432     if(type == DEVICE_PROBE)
 433         AppendDeviceList(pa_device);
 434     else if(type == ALL_DEVICE_PROBE)
 435         AppendAllDeviceList(pa_device);
 436     else if(type == CAPTURE_DEVICE_PROBE)
 437         AppendCaptureDeviceList(pa_device);
 438 }