Alc/pulseaudio.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2009 by Konstantinos Natsakis <konstantinos.natsakis@gmail.com>
   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 "alMain.h"
  24 #ifdef HAVE_DLFCN_H
  25 #include <dlfcn.h>
  26 #endif
  27
  28 #include <pulse/pulseaudio.h>
  29
  30 #if PA_API_VERSION == 11
  31 #define PA_STREAM_ADJUST_LATENCY 0x2000U
  32 static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x)
  33 {
  34     return (x == PA_STREAM_CREATING || x == PA_STREAM_READY);
  35 }
  36 static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x)
  37 {
  38     return (x == PA_CONTEXT_CONNECTING || x == PA_CONTEXT_AUTHORIZING ||
  39             x == PA_CONTEXT_SETTING_NAME || x == PA_CONTEXT_READY);
  40 }
  41 #define PA_STREAM_IS_GOOD PA_STREAM_IS_GOOD
  42 #define PA_CONTEXT_IS_GOOD PA_CONTEXT_IS_GOOD
  43 #elif PA_API_VERSION != 12
  44 #error Invalid PulseAudio API version
  45 #endif
  46
  47 static void *pa_handle;
  48 #define MAKE_FUNC(x) static typeof(x) * p##x
  49 MAKE_FUNC(pa_context_unref);
  50 MAKE_FUNC(pa_sample_spec_valid);
  51 MAKE_FUNC(pa_stream_drop);
  52 MAKE_FUNC(pa_strerror);
  53 MAKE_FUNC(pa_context_get_state);
  54 MAKE_FUNC(pa_stream_get_state);
  55 MAKE_FUNC(pa_threaded_mainloop_signal);
  56 MAKE_FUNC(pa_stream_peek);
  57 MAKE_FUNC(pa_threaded_mainloop_wait);
  58 MAKE_FUNC(pa_threaded_mainloop_unlock);
  59 MAKE_FUNC(pa_threaded_mainloop_in_thread);
  60 MAKE_FUNC(pa_context_new);
  61 MAKE_FUNC(pa_threaded_mainloop_stop);
  62 MAKE_FUNC(pa_context_disconnect);
  63 MAKE_FUNC(pa_threaded_mainloop_start);
  64 MAKE_FUNC(pa_threaded_mainloop_get_api);
  65 MAKE_FUNC(pa_context_set_state_callback);
  66 MAKE_FUNC(pa_stream_write);
  67 MAKE_FUNC(pa_xfree);
  68 MAKE_FUNC(pa_stream_connect_record);
  69 MAKE_FUNC(pa_stream_connect_playback);
  70 MAKE_FUNC(pa_path_get_filename);
  71 MAKE_FUNC(pa_get_binary_name);
  72 MAKE_FUNC(pa_threaded_mainloop_free);
  73 MAKE_FUNC(pa_context_errno);
  74 MAKE_FUNC(pa_xmalloc0);
  75 MAKE_FUNC(pa_stream_unref);
  76 MAKE_FUNC(pa_threaded_mainloop_accept);
  77 MAKE_FUNC(pa_stream_set_write_callback);
  78 MAKE_FUNC(pa_threaded_mainloop_new);
  79 MAKE_FUNC(pa_context_connect);
  80 MAKE_FUNC(pa_stream_get_buffer_attr);
  81 MAKE_FUNC(pa_stream_set_buffer_attr_callback);
  82 MAKE_FUNC(pa_stream_set_read_callback);
  83 MAKE_FUNC(pa_stream_set_state_callback);
  84 MAKE_FUNC(pa_stream_new);
  85 MAKE_FUNC(pa_stream_disconnect);
  86 MAKE_FUNC(pa_threaded_mainloop_lock);
  87 #undef MAKE_FUNC
  88
  89 #ifndef PATH_MAX
  90 #define PATH_MAX 4096
  91 #endif
  92
  93 typedef struct {
  94     ALCuint samples;
  95     ALCuint frame_size;
  96
  97     RingBuffer *ring;
  98
  99     pa_buffer_attr attr;
 100     pa_sample_spec spec;
 101
 102     char path_name[PATH_MAX];
 103     const char *context_name;
 104     const char *stream_name;
 105
 106     pa_threaded_mainloop *loop;
 107
 108     pa_stream *stream;
 109     pa_context *context;
 110 } pulse_data;
 111
 112 static const ALCchar pulse_device[] = "PulseAudio Software";
 113 static const ALCchar pulse_capture_device[] = "PulseAudio Capture";
 114 static volatile ALuint load_count;
 115
 116
 117 void pulse_load(void) //{{{
 118 {
 119     if(load_count == 0)
 120     {
 121 #ifdef _WIN32
 122         pa_handle = LoadLibrary("libpulse-0.dll");
 123 #define LOAD_FUNC(x) do { \
 124     p##x = GetProcAddress(pa_handle, #x); \
 125     if(!(p##x)) { \
 126         AL_PRINT("Could not load %s from libpulse-0.dll\n", #x); \
 127         FreeLibrary(pa_handle); \
 128         pa_handle = NULL; \
 129         return; \
 130     } \
 131 } while(0)
 132
 133 #elif defined (HAVE_DLFCN_H)
 134
 135         const char *err;
 136 #if defined(__APPLE__) && defined(__MACH__)
 137         pa_handle = dlopen("libpulse.0.dylib", RTLD_NOW);
 138 #else
 139         pa_handle = dlopen("libpulse.so.0", RTLD_NOW);
 140 #endif
 141         dlerror();
 142
 143 #define LOAD_FUNC(x) do { \
 144     p##x = dlsym(pa_handle, #x); \
 145     if((err=dlerror()) != NULL) { \
 146         AL_PRINT("Could not load %s from libpulse: %s\n", #x, err); \
 147         dlclose(pa_handle); \
 148         pa_handle = NULL; \
 149         return; \
 150     } \
 151 } while(0)
 152
 153 #else
 154
 155         pa_handle = (void*)0xDEADBEEF;
 156 #define LOAD_FUNC(x) p##x = (x)
 157
 158 #endif
 159         if(!pa_handle)
 160             return;
 161
 162 LOAD_FUNC(pa_context_unref);
 163 LOAD_FUNC(pa_sample_spec_valid);
 164 LOAD_FUNC(pa_stream_drop);
 165 LOAD_FUNC(pa_strerror);
 166 LOAD_FUNC(pa_context_get_state);
 167 LOAD_FUNC(pa_stream_get_state);
 168 LOAD_FUNC(pa_threaded_mainloop_signal);
 169 LOAD_FUNC(pa_stream_peek);
 170 LOAD_FUNC(pa_threaded_mainloop_wait);
 171 LOAD_FUNC(pa_threaded_mainloop_unlock);
 172 LOAD_FUNC(pa_threaded_mainloop_in_thread);
 173 LOAD_FUNC(pa_context_new);
 174 LOAD_FUNC(pa_threaded_mainloop_stop);
 175 LOAD_FUNC(pa_context_disconnect);
 176 LOAD_FUNC(pa_threaded_mainloop_start);
 177 LOAD_FUNC(pa_threaded_mainloop_get_api);
 178 LOAD_FUNC(pa_context_set_state_callback);
 179 LOAD_FUNC(pa_stream_write);
 180 LOAD_FUNC(pa_xfree);
 181 LOAD_FUNC(pa_stream_connect_record);
 182 LOAD_FUNC(pa_stream_connect_playback);
 183 LOAD_FUNC(pa_path_get_filename);
 184 LOAD_FUNC(pa_get_binary_name);
 185 LOAD_FUNC(pa_threaded_mainloop_free);
 186 LOAD_FUNC(pa_context_errno);
 187 LOAD_FUNC(pa_xmalloc0);
 188 LOAD_FUNC(pa_stream_unref);
 189 LOAD_FUNC(pa_threaded_mainloop_accept);
 190 LOAD_FUNC(pa_stream_set_write_callback);
 191 LOAD_FUNC(pa_threaded_mainloop_new);
 192 LOAD_FUNC(pa_context_connect);
 193 LOAD_FUNC(pa_stream_get_buffer_attr);
 194 LOAD_FUNC(pa_stream_set_buffer_attr_callback);
 195 LOAD_FUNC(pa_stream_set_read_callback);
 196 LOAD_FUNC(pa_stream_set_state_callback);
 197 LOAD_FUNC(pa_stream_new);
 198 LOAD_FUNC(pa_stream_disconnect);
 199 LOAD_FUNC(pa_threaded_mainloop_lock);
 200
 201 #undef LOAD_FUNC
 202     }
 203     ++load_count;
 204 } //}}}
 205
 206 void pulse_unload(void) //{{{
 207 {
 208     if(load_count == 0 || --load_count > 0)
 209         return;
 210
 211 #ifdef _WIN32
 212     FreeLibrary(pa_handle);
 213 #elif defined (HAVE_DLFCN_H)
 214     dlclose(pa_handle);
 215 #endif
 216     pa_handle = NULL;
 217 } //}}}
 218
 219
 220 // PulseAudio Event Callbacks //{{{
 221 static void context_state_callback(pa_context *context, void *pdata) //{{{
 222 {
 223     ALCdevice *Device = pdata;
 224     pulse_data *data = Device->ExtraData;
 225     (void)context;
 226
 227     if(ppa_threaded_mainloop_in_thread(data->loop))
 228         ppa_threaded_mainloop_signal(data->loop, 1);
 229 }//}}}
 230
 231 static void stream_state_callback(pa_stream *stream, void *pdata) //{{{
 232 {
 233     ALCdevice *Device = pdata;
 234     pulse_data *data = Device->ExtraData;
 235     (void)stream;
 236
 237     if(ppa_threaded_mainloop_in_thread(data->loop))
 238         ppa_threaded_mainloop_signal(data->loop, 1);
 239 }//}}}
 240
 241 static void stream_buffer_attr_callback(pa_stream *stream, void *pdata) //{{{
 242 {
 243     ALCdevice *Device = pdata;
 244     pulse_data *data = Device->ExtraData;
 245
 246     SuspendContext(NULL);
 247
 248     data->attr = *(ppa_stream_get_buffer_attr(stream));
 249     if((data->attr.tlength%data->attr.minreq) != 0)
 250         AL_PRINT("new tlength (%d) is not a multiple of minreq (%d)!\n",
 251                  data->attr.tlength, data->attr.minreq);
 252     Device->UpdateSize = data->attr.minreq;
 253     Device->NumUpdates = data->attr.tlength/data->attr.minreq;
 254
 255     ProcessContext(NULL);
 256 }//}}}
 257 //}}}
 258
 259 // PulseAudio I/O Callbacks //{{{
 260 static void stream_write_callback(pa_stream *stream, size_t len, void *pdata) //{{{
 261 {
 262     ALCdevice *Device = pdata;
 263     pulse_data *data = Device->ExtraData;
 264     void *buf = ppa_xmalloc0(data->attr.minreq);
 265     (void)len;
 266
 267     aluMixData(Device, buf, data->attr.minreq/data->frame_size);
 268     ppa_stream_write(stream, buf, data->attr.minreq, ppa_xfree, 0,
 269                      PA_SEEK_RELATIVE);
 270 } //}}}
 271
 272 static void stream_read_callback(pa_stream *stream, size_t length, void *pdata) //{{{
 273 {
 274     ALCdevice *Device = pdata;
 275     pulse_data *data = Device->ExtraData;
 276     const void *buf;
 277
 278     if(ppa_stream_peek(stream, &buf, &length) < 0)
 279     {
 280         AL_PRINT("pa_stream_peek() failed: %s\n",
 281                  ppa_strerror(ppa_context_errno(data->context)));
 282         return;
 283     }
 284
 285     assert(buf);
 286     assert(length);
 287
 288     length /= data->frame_size;
 289
 290     if(data->samples < length)
 291         AL_PRINT("stream_read_callback: buffer overflow!\n");
 292
 293     WriteRingBuffer(data->ring, buf, (length<data->samples) ? length : data->samples);
 294
 295     ppa_stream_drop(stream);
 296 } //}}}
 297 //}}}
 298
 299 static ALCboolean pulse_open(ALCdevice *device, const ALCchar *device_name) //{{{
 300 {
 301     pulse_data *data = ppa_xmalloc0(sizeof(pulse_data));
 302     pa_context_state_t state;
 303
 304     if(ppa_get_binary_name(data->path_name, sizeof(data->path_name)))
 305         data->context_name = ppa_path_get_filename(data->path_name);
 306     else
 307         data->context_name = "OpenAL Soft";
 308
 309     if(!(data->loop = ppa_threaded_mainloop_new()))
 310     {
 311         AL_PRINT("pa_threaded_mainloop_new() failed!\n");
 312         goto out;
 313     }
 314
 315     if(ppa_threaded_mainloop_start(data->loop) < 0)
 316     {
 317         AL_PRINT("pa_threaded_mainloop_start() failed\n");
 318         goto out;
 319     }
 320
 321     ppa_threaded_mainloop_lock(data->loop);
 322     device->ExtraData = data;
 323
 324     data->context = ppa_context_new(ppa_threaded_mainloop_get_api(data->loop), data->context_name);
 325     if(!data->context)
 326     {
 327         AL_PRINT("pa_context_new() failed: %s\n",
 328                  ppa_strerror(ppa_context_errno(data->context)));
 329
 330         ppa_threaded_mainloop_unlock(data->loop);
 331         goto out;
 332     }
 333
 334     ppa_context_set_state_callback(data->context, context_state_callback, device);
 335
 336     if(ppa_context_connect(data->context, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL) < 0)
 337     {
 338         AL_PRINT("Context did not connect: %s\n",
 339                  ppa_strerror(ppa_context_errno(data->context)));
 340
 341         ppa_context_unref(data->context);
 342         data->context = NULL;
 343
 344         ppa_threaded_mainloop_unlock(data->loop);
 345         goto out;
 346     }
 347
 348     while((state=ppa_context_get_state(data->context)) != PA_CONTEXT_READY)
 349     {
 350         if(!PA_CONTEXT_IS_GOOD(state))
 351         {
 352             AL_PRINT("Context did not get ready: %s\n",
 353                      ppa_strerror(ppa_context_errno(data->context)));
 354
 355             ppa_context_unref(data->context);
 356             data->context = NULL;
 357
 358             ppa_threaded_mainloop_unlock(data->loop);
 359             goto out;
 360         }
 361
 362         ppa_threaded_mainloop_wait(data->loop);
 363         ppa_threaded_mainloop_accept(data->loop);
 364     }
 365     ppa_context_set_state_callback(data->context, NULL, NULL);
 366
 367     device->szDeviceName = strdup(device_name);
 368
 369     ppa_threaded_mainloop_unlock(data->loop);
 370     return ALC_TRUE;
 371
 372 out:
 373     if(data->loop)
 374     {
 375         ppa_threaded_mainloop_stop(data->loop);
 376         ppa_threaded_mainloop_free(data->loop);
 377     }
 378
 379     device->ExtraData = NULL;
 380     ppa_xfree(data);
 381     return ALC_FALSE;
 382 } //}}}
 383
 384 static void pulse_close(ALCdevice *device) //{{{
 385 {
 386     pulse_data *data = device->ExtraData;
 387
 388     ppa_threaded_mainloop_lock(data->loop);
 389
 390     if(data->stream)
 391     {
 392         ppa_stream_disconnect(data->stream);
 393         ppa_stream_unref(data->stream);
 394     }
 395
 396     ppa_context_disconnect(data->context);
 397     ppa_context_unref(data->context);
 398
 399     ppa_threaded_mainloop_unlock(data->loop);
 400
 401     ppa_threaded_mainloop_stop(data->loop);
 402     ppa_threaded_mainloop_free(data->loop);
 403
 404     DestroyRingBuffer(data->ring);
 405
 406     device->ExtraData = NULL;
 407     ppa_xfree(data);
 408 } //}}}
 409 //}}}
 410
 411 // OpenAL {{{
 412 static ALCboolean pulse_open_playback(ALCdevice *device, const ALCchar *device_name) //{{{
 413 {
 414     if(!device_name)
 415         device_name = pulse_device;
 416     else if(strcmp(device_name, pulse_device) != 0)
 417         return ALC_FALSE;
 418
 419     pulse_load();
 420     if(!pa_handle)
 421         return ALC_FALSE;
 422
 423     if(pulse_open(device, device_name) != ALC_FALSE)
 424         return ALC_TRUE;
 425
 426     pulse_unload();
 427     return ALC_FALSE;
 428 } //}}}
 429
 430 static void pulse_close_playback(ALCdevice *device) //{{{
 431 {
 432     pulse_close(device);
 433     pulse_unload();
 434 } //}}}
 435
 436 static ALCboolean pulse_reset_playback(ALCdevice *device) //{{{
 437 {
 438     pulse_data *data = device->ExtraData;
 439     pa_stream_state_t state;
 440
 441     ppa_threaded_mainloop_lock(data->loop);
 442
 443     data->frame_size = aluBytesFromFormat(device->Format) *
 444                        aluChannelsFromFormat(device->Format);
 445     data->attr.minreq = data->frame_size * device->UpdateSize;
 446     data->attr.prebuf = -1;
 447     data->attr.maxlength = -1;
 448     data->attr.fragsize = -1;
 449     data->attr.tlength = data->attr.minreq * device->NumUpdates;
 450     data->stream_name = "Playback Stream";
 451
 452     switch(aluBytesFromFormat(device->Format))
 453     {
 454         case 1:
 455             data->spec.format = PA_SAMPLE_U8;
 456             break;
 457         case 2:
 458             data->spec.format = PA_SAMPLE_S16NE;
 459             break;
 460         case 4:
 461             data->spec.format = PA_SAMPLE_FLOAT32NE;
 462             break;
 463         default:
 464             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 465             ppa_threaded_mainloop_unlock(data->loop);
 466             return ALC_FALSE;
 467     }
 468     data->spec.rate = device->Frequency;
 469     data->spec.channels = aluChannelsFromFormat(device->Format);
 470
 471     if(ppa_sample_spec_valid(&data->spec) == 0)
 472     {
 473         AL_PRINT("Invalid sample format\n");
 474         ppa_threaded_mainloop_unlock(data->loop);
 475         return ALC_FALSE;
 476     }
 477
 478     data->stream = ppa_stream_new(data->context, data->stream_name, &data->spec, NULL);
 479     if(!data->stream)
 480     {
 481         AL_PRINT("pa_stream_new() failed: %s\n",
 482                  ppa_strerror(ppa_context_errno(data->context)));
 483
 484         ppa_threaded_mainloop_unlock(data->loop);
 485         return ALC_FALSE;
 486     }
 487
 488     ppa_stream_set_state_callback(data->stream, stream_state_callback, device);
 489     ppa_stream_set_write_callback(data->stream, stream_write_callback, device);
 490
 491     if(ppa_stream_connect_playback(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY, NULL, NULL) < 0)
 492     {
 493         AL_PRINT("Stream did not connect: %s\n",
 494                  ppa_strerror(ppa_context_errno(data->context)));
 495
 496         ppa_stream_unref(data->stream);
 497         data->stream = NULL;
 498
 499         ppa_threaded_mainloop_unlock(data->loop);
 500         return ALC_FALSE;
 501     }
 502
 503     while((state=ppa_stream_get_state(data->stream)) != PA_STREAM_READY)
 504     {
 505         if(!PA_STREAM_IS_GOOD(state))
 506         {
 507             AL_PRINT("Stream did not get ready: %s\n",
 508                      ppa_strerror(ppa_context_errno(data->context)));
 509
 510             ppa_stream_unref(data->stream);
 511             data->stream = NULL;
 512
 513             ppa_threaded_mainloop_unlock(data->loop);
 514             return ALC_FALSE;
 515         }
 516
 517         ppa_threaded_mainloop_wait(data->loop);
 518         ppa_threaded_mainloop_accept(data->loop);
 519     }
 520     ppa_stream_set_state_callback(data->stream, NULL, NULL);
 521
 522     stream_buffer_attr_callback(data->stream, device);
 523     ppa_stream_set_buffer_attr_callback(data->stream, stream_buffer_attr_callback, device);
 524
 525     ppa_threaded_mainloop_unlock(data->loop);
 526     return ALC_TRUE;
 527 } //}}}
 528
 529 static void pulse_stop_playback(ALCdevice *device) //{{{
 530 {
 531     pulse_data *data = device->ExtraData;
 532
 533     if(!data->stream)
 534         return;
 535
 536     ppa_threaded_mainloop_lock(data->loop);
 537
 538     ppa_stream_disconnect(data->stream);
 539     ppa_stream_unref(data->stream);
 540     data->stream = NULL;
 541
 542     ppa_threaded_mainloop_unlock(data->loop);
 543 } //}}}
 544
 545
 546 static ALCboolean pulse_open_capture(ALCdevice *device, const ALCchar *device_name) //{{{
 547 {
 548     pulse_data *data;
 549     pa_stream_state_t state;
 550
 551     if(!device_name)
 552         device_name = pulse_capture_device;
 553     else if(strcmp(device_name, pulse_capture_device) != 0)
 554         return ALC_FALSE;
 555
 556     pulse_load();
 557     if(!pa_handle)
 558         return ALC_FALSE;
 559
 560     if(pulse_open(device, device_name) == ALC_FALSE)
 561     {
 562         pulse_unload();
 563         return ALC_FALSE;
 564     }
 565
 566     data = device->ExtraData;
 567     ppa_threaded_mainloop_lock(data->loop);
 568
 569     data->samples = device->UpdateSize * device->NumUpdates;
 570     data->frame_size = aluBytesFromFormat(device->Format) *
 571                        aluChannelsFromFormat(device->Format);
 572
 573     if(!(data->ring = CreateRingBuffer(data->frame_size, data->samples)))
 574     {
 575         ppa_threaded_mainloop_unlock(data->loop);
 576         pulse_close(device);
 577         pulse_unload();
 578         return ALC_FALSE;
 579     }
 580
 581     data->attr.minreq = -1;
 582     data->attr.prebuf = -1;
 583     data->attr.maxlength = -1;
 584     data->attr.tlength = -1;
 585     data->attr.fragsize = data->frame_size * data->samples / 2;
 586     data->stream_name = "Capture Stream";
 587
 588     data->spec.rate = device->Frequency;
 589     data->spec.channels = aluChannelsFromFormat(device->Format);
 590
 591     switch(aluBytesFromFormat(device->Format))
 592     {
 593         case 1:
 594             data->spec.format = PA_SAMPLE_U8;
 595             break;
 596         case 2:
 597             data->spec.format = PA_SAMPLE_S16NE;
 598             break;
 599         case 4:
 600             data->spec.format = PA_SAMPLE_FLOAT32NE;
 601             break;
 602         default:
 603             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 604             ppa_threaded_mainloop_unlock(data->loop);
 605             pulse_close(device);
 606             pulse_unload();
 607             return ALC_FALSE;
 608     }
 609
 610     if(ppa_sample_spec_valid(&data->spec) == 0)
 611     {
 612         AL_PRINT("Invalid sample format\n");
 613         ppa_threaded_mainloop_unlock(data->loop);
 614         pulse_close(device);
 615         pulse_unload();
 616         return ALC_FALSE;
 617     }
 618
 619     data->stream = ppa_stream_new(data->context, data->stream_name, &data->spec, NULL);
 620     if(!data->stream)
 621     {
 622         AL_PRINT("pa_stream_new() failed: %s\n",
 623                  ppa_strerror(ppa_context_errno(data->context)));
 624
 625         ppa_threaded_mainloop_unlock(data->loop);
 626         pulse_close(device);
 627         pulse_unload();
 628         return ALC_FALSE;
 629     }
 630
 631     ppa_stream_set_state_callback(data->stream, stream_state_callback, device);
 632
 633     if(ppa_stream_connect_record(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY) < 0)
 634     {
 635         AL_PRINT("Stream did not connect: %s\n",
 636                  ppa_strerror(ppa_context_errno(data->context)));
 637
 638         ppa_stream_unref(data->stream);
 639         ppa_threaded_mainloop_unlock(data->loop);
 640
 641         data->stream = NULL;
 642         pulse_close(device);
 643         pulse_unload();
 644         return ALC_FALSE;
 645     }
 646
 647     while((state=ppa_stream_get_state(data->stream)) != PA_STREAM_READY)
 648     {
 649         if(!PA_STREAM_IS_GOOD(state))
 650         {
 651             AL_PRINT("Stream did not get ready: %s\n",
 652                      ppa_strerror(ppa_context_errno(data->context)));
 653
 654             ppa_stream_unref(data->stream);
 655             ppa_threaded_mainloop_unlock(data->loop);
 656
 657             data->stream = NULL;
 658             pulse_close(device);
 659             pulse_unload();
 660             return ALC_FALSE;
 661         }
 662
 663         ppa_threaded_mainloop_wait(data->loop);
 664         ppa_threaded_mainloop_accept(data->loop);
 665     }
 666     ppa_stream_set_state_callback(data->stream, NULL, NULL);
 667
 668     ppa_threaded_mainloop_unlock(data->loop);
 669     return ALC_TRUE;
 670 } //}}}
 671
 672 static void pulse_close_capture(ALCdevice *device) //{{{
 673 {
 674     pulse_close(device);
 675     pulse_unload();
 676 } //}}}
 677
 678 static void pulse_start_capture(ALCdevice *device) //{{{
 679 {
 680     pulse_data *data = device->ExtraData;
 681
 682     ppa_threaded_mainloop_lock(data->loop);
 683     ppa_stream_set_read_callback(data->stream, stream_read_callback, device);
 684     ppa_threaded_mainloop_unlock(data->loop);
 685 } //}}}
 686
 687 static void pulse_stop_capture(ALCdevice *device) //{{{
 688 {
 689     pulse_data *data = device->ExtraData;
 690
 691     ppa_threaded_mainloop_lock(data->loop);
 692     ppa_stream_set_read_callback(data->stream, NULL, NULL);
 693     ppa_threaded_mainloop_unlock(data->loop);
 694 } //}}}
 695
 696 static void pulse_capture_samples(ALCdevice *device, ALCvoid *buffer, ALCuint samples) //{{{
 697 {
 698     pulse_data *data = device->ExtraData;
 699     ALCuint available = RingBufferSize(data->ring);
 700
 701     if(available < samples)
 702         alcSetError(ALC_INVALID_VALUE);
 703     else
 704         ReadRingBuffer(data->ring, buffer, samples);
 705 } //}}}
 706
 707 static ALCuint pulse_available_samples(ALCdevice *device) //{{{
 708 {
 709     pulse_data *data = device->ExtraData;
 710     return RingBufferSize(data->ring);
 711 } //}}}
 712
 713 BackendFuncs pulse_funcs = { //{{{
 714     pulse_open_playback,
 715     pulse_close_playback,
 716     pulse_reset_playback,
 717     pulse_stop_playback,
 718     pulse_open_capture,
 719     pulse_close_capture,
 720     pulse_start_capture,
 721     pulse_stop_capture,
 722     pulse_capture_samples,
 723     pulse_available_samples
 724 }; //}}}
 725
 726 void alc_pulse_init(BackendFuncs *func_list) //{{{
 727 {
 728     *func_list = pulse_funcs;
 729 } //}}}
 730
 731 void alc_pulse_deinit(void) //{{{
 732 {
 733 } //}}}
 734
 735 void alc_pulse_probe(int type) //{{{
 736 {
 737     pulse_load();
 738     if(!pa_handle) return;
 739
 740     if(type == DEVICE_PROBE)
 741         AppendDeviceList(pulse_device);
 742     else if(type == ALL_DEVICE_PROBE)
 743         AppendAllDeviceList(pulse_device);
 744     else if(type == CAPTURE_DEVICE_PROBE)
 745         AppendCaptureDeviceList(pulse_capture_device);
 746
 747     pulse_unload();
 748 } //}}}
 749 //}}}