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 MAKE_FUNC(pa_channel_map_init_auto);
  88 MAKE_FUNC(pa_channel_map_parse);
  89 #undef MAKE_FUNC
  90
  91 #ifndef PATH_MAX
  92 #define PATH_MAX 4096
  93 #endif
  94
  95 typedef struct {
  96     ALCuint samples;
  97     ALCuint frame_size;
  98
  99     RingBuffer *ring;
 100
 101     pa_buffer_attr attr;
 102     pa_sample_spec spec;
 103
 104     char path_name[PATH_MAX];
 105     const char *context_name;
 106     const char *stream_name;
 107
 108     pa_threaded_mainloop *loop;
 109
 110     pa_stream *stream;
 111     pa_context *context;
 112 } pulse_data;
 113
 114 static const ALCchar pulse_device[] = "PulseAudio Software";
 115 static const ALCchar pulse_capture_device[] = "PulseAudio Capture";
 116 static volatile ALuint load_count;
 117
 118
 119 void pulse_load(void) //{{{
 120 {
 121     if(load_count == 0)
 122     {
 123 #ifdef _WIN32
 124         pa_handle = LoadLibrary("libpulse-0.dll");
 125 #define LOAD_FUNC(x) do { \
 126     p##x = GetProcAddress(pa_handle, #x); \
 127     if(!(p##x)) { \
 128         AL_PRINT("Could not load %s from libpulse-0.dll\n", #x); \
 129         FreeLibrary(pa_handle); \
 130         pa_handle = NULL; \
 131         return; \
 132     } \
 133 } while(0)
 134
 135 #elif defined (HAVE_DLFCN_H)
 136
 137         const char *err;
 138 #if defined(__APPLE__) && defined(__MACH__)
 139         pa_handle = dlopen("libpulse.0.dylib", RTLD_NOW);
 140 #else
 141         pa_handle = dlopen("libpulse.so.0", RTLD_NOW);
 142 #endif
 143         dlerror();
 144
 145 #define LOAD_FUNC(x) do { \
 146     p##x = dlsym(pa_handle, #x); \
 147     if((err=dlerror()) != NULL) { \
 148         AL_PRINT("Could not load %s from libpulse: %s\n", #x, err); \
 149         dlclose(pa_handle); \
 150         pa_handle = NULL; \
 151         return; \
 152     } \
 153 } while(0)
 154
 155 #else
 156
 157         pa_handle = (void*)0xDEADBEEF;
 158 #define LOAD_FUNC(x) p##x = (x)
 159
 160 #endif
 161         if(!pa_handle)
 162             return;
 163
 164 LOAD_FUNC(pa_context_unref);
 165 LOAD_FUNC(pa_sample_spec_valid);
 166 LOAD_FUNC(pa_stream_drop);
 167 LOAD_FUNC(pa_strerror);
 168 LOAD_FUNC(pa_context_get_state);
 169 LOAD_FUNC(pa_stream_get_state);
 170 LOAD_FUNC(pa_threaded_mainloop_signal);
 171 LOAD_FUNC(pa_stream_peek);
 172 LOAD_FUNC(pa_threaded_mainloop_wait);
 173 LOAD_FUNC(pa_threaded_mainloop_unlock);
 174 LOAD_FUNC(pa_threaded_mainloop_in_thread);
 175 LOAD_FUNC(pa_context_new);
 176 LOAD_FUNC(pa_threaded_mainloop_stop);
 177 LOAD_FUNC(pa_context_disconnect);
 178 LOAD_FUNC(pa_threaded_mainloop_start);
 179 LOAD_FUNC(pa_threaded_mainloop_get_api);
 180 LOAD_FUNC(pa_context_set_state_callback);
 181 LOAD_FUNC(pa_stream_write);
 182 LOAD_FUNC(pa_xfree);
 183 LOAD_FUNC(pa_stream_connect_record);
 184 LOAD_FUNC(pa_stream_connect_playback);
 185 LOAD_FUNC(pa_path_get_filename);
 186 LOAD_FUNC(pa_get_binary_name);
 187 LOAD_FUNC(pa_threaded_mainloop_free);
 188 LOAD_FUNC(pa_context_errno);
 189 LOAD_FUNC(pa_xmalloc0);
 190 LOAD_FUNC(pa_stream_unref);
 191 LOAD_FUNC(pa_threaded_mainloop_accept);
 192 LOAD_FUNC(pa_stream_set_write_callback);
 193 LOAD_FUNC(pa_threaded_mainloop_new);
 194 LOAD_FUNC(pa_context_connect);
 195 LOAD_FUNC(pa_stream_get_buffer_attr);
 196 LOAD_FUNC(pa_stream_set_buffer_attr_callback);
 197 LOAD_FUNC(pa_stream_set_read_callback);
 198 LOAD_FUNC(pa_stream_set_state_callback);
 199 LOAD_FUNC(pa_stream_new);
 200 LOAD_FUNC(pa_stream_disconnect);
 201 LOAD_FUNC(pa_threaded_mainloop_lock);
 202 LOAD_FUNC(pa_channel_map_init_auto);
 203 LOAD_FUNC(pa_channel_map_parse);
 204
 205 #undef LOAD_FUNC
 206     }
 207     ++load_count;
 208 } //}}}
 209
 210 void pulse_unload(void) //{{{
 211 {
 212     if(load_count == 0 || --load_count > 0)
 213         return;
 214
 215 #ifdef _WIN32
 216     FreeLibrary(pa_handle);
 217 #elif defined (HAVE_DLFCN_H)
 218     dlclose(pa_handle);
 219 #endif
 220     pa_handle = NULL;
 221 } //}}}
 222
 223
 224 // PulseAudio Event Callbacks //{{{
 225 static void context_state_callback(pa_context *context, void *pdata) //{{{
 226 {
 227     ALCdevice *Device = pdata;
 228     pulse_data *data = Device->ExtraData;
 229     pa_context_state_t state;
 230
 231     state = ppa_context_get_state(context);
 232     if(state == PA_CONTEXT_READY || !PA_CONTEXT_IS_GOOD(state))
 233     {
 234         if(ppa_threaded_mainloop_in_thread(data->loop))
 235             ppa_threaded_mainloop_signal(data->loop, 0);
 236     }
 237 }//}}}
 238
 239 static void stream_state_callback(pa_stream *stream, void *pdata) //{{{
 240 {
 241     ALCdevice *Device = pdata;
 242     pulse_data *data = Device->ExtraData;
 243     pa_stream_state_t state;
 244
 245     state = ppa_stream_get_state(stream);
 246     if(state == PA_STREAM_READY || !PA_STREAM_IS_GOOD(state))
 247     {
 248         if(ppa_threaded_mainloop_in_thread(data->loop))
 249             ppa_threaded_mainloop_signal(data->loop, 0);
 250     }
 251 }//}}}
 252
 253 static void stream_buffer_attr_callback(pa_stream *stream, void *pdata) //{{{
 254 {
 255     ALCdevice *Device = pdata;
 256     pulse_data *data = Device->ExtraData;
 257
 258     SuspendContext(NULL);
 259
 260     data->attr = *(ppa_stream_get_buffer_attr(stream));
 261     if(data->attr.tlength < data->attr.minreq*2)
 262         AL_PRINT("new tlength (%d) is smaller than two periods (%d x 2)!\n",
 263                  data->attr.tlength, data->attr.minreq);
 264     Device->UpdateSize = data->attr.minreq / data->frame_size;
 265     Device->NumUpdates = data->attr.tlength/data->attr.minreq;
 266
 267     ProcessContext(NULL);
 268 }//}}}
 269
 270 static void context_state_callback2(pa_context *context, void *pdata) //{{{
 271 {
 272     ALCdevice *Device = pdata;
 273
 274     if(ppa_context_get_state(context) == PA_CONTEXT_FAILED)
 275     {
 276         AL_PRINT("Received context failure!\n");
 277         aluHandleDisconnect(Device);
 278     }
 279 }//}}}
 280
 281 static void stream_state_callback2(pa_stream *stream, void *pdata) //{{{
 282 {
 283     ALCdevice *Device = pdata;
 284
 285     if(ppa_stream_get_state(stream) == PA_STREAM_FAILED)
 286     {
 287         AL_PRINT("Received stream failure!\n");
 288         aluHandleDisconnect(Device);
 289     }
 290 }//}}}
 291
 292 //}}}
 293
 294 // PulseAudio I/O Callbacks //{{{
 295 static void stream_write_callback(pa_stream *stream, size_t len, void *pdata) //{{{
 296 {
 297     ALCdevice *Device = pdata;
 298     pulse_data *data = Device->ExtraData;
 299
 300     len -= len%data->attr.minreq;
 301     if(len > 0)
 302     {
 303         void *buf = ppa_xmalloc0(len);
 304         aluMixData(Device, buf, len/data->frame_size);
 305         ppa_stream_write(stream, buf, len, ppa_xfree, 0, PA_SEEK_RELATIVE);
 306     }
 307 } //}}}
 308
 309 static void stream_read_callback(pa_stream *stream, size_t length, void *pdata) //{{{
 310 {
 311     ALCdevice *Device = pdata;
 312     pulse_data *data = Device->ExtraData;
 313     const void *buf;
 314
 315     if(ppa_stream_peek(stream, &buf, &length) < 0)
 316     {
 317         AL_PRINT("pa_stream_peek() failed: %s\n",
 318                  ppa_strerror(ppa_context_errno(data->context)));
 319         return;
 320     }
 321
 322     assert(buf);
 323     assert(length);
 324
 325     length /= data->frame_size;
 326
 327     if(data->samples < length)
 328         AL_PRINT("stream_read_callback: buffer overflow!\n");
 329
 330     WriteRingBuffer(data->ring, buf, (length<data->samples) ? length : data->samples);
 331
 332     ppa_stream_drop(stream);
 333 } //}}}
 334 //}}}
 335
 336 static ALCboolean pulse_open(ALCdevice *device, const ALCchar *device_name) //{{{
 337 {
 338     pulse_data *data = ppa_xmalloc0(sizeof(pulse_data));
 339     pa_context_state_t state;
 340
 341     if(ppa_get_binary_name(data->path_name, sizeof(data->path_name)))
 342         data->context_name = ppa_path_get_filename(data->path_name);
 343     else
 344         data->context_name = "OpenAL Soft";
 345
 346     if(!(data->loop = ppa_threaded_mainloop_new()))
 347     {
 348         AL_PRINT("pa_threaded_mainloop_new() failed!\n");
 349         goto out;
 350     }
 351
 352     if(ppa_threaded_mainloop_start(data->loop) < 0)
 353     {
 354         AL_PRINT("pa_threaded_mainloop_start() failed\n");
 355         goto out;
 356     }
 357
 358     ppa_threaded_mainloop_lock(data->loop);
 359     device->ExtraData = data;
 360
 361     data->context = ppa_context_new(ppa_threaded_mainloop_get_api(data->loop), data->context_name);
 362     if(!data->context)
 363     {
 364         AL_PRINT("pa_context_new() failed: %s\n",
 365                  ppa_strerror(ppa_context_errno(data->context)));
 366
 367         ppa_threaded_mainloop_unlock(data->loop);
 368         goto out;
 369     }
 370
 371     ppa_context_set_state_callback(data->context, context_state_callback, device);
 372
 373     if(ppa_context_connect(data->context, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL) < 0)
 374     {
 375         AL_PRINT("Context did not connect: %s\n",
 376                  ppa_strerror(ppa_context_errno(data->context)));
 377
 378         ppa_context_unref(data->context);
 379         data->context = NULL;
 380
 381         ppa_threaded_mainloop_unlock(data->loop);
 382         goto out;
 383     }
 384
 385     while((state=ppa_context_get_state(data->context)) != PA_CONTEXT_READY)
 386     {
 387         if(!PA_CONTEXT_IS_GOOD(state))
 388         {
 389             AL_PRINT("Context did not get ready: %s\n",
 390                      ppa_strerror(ppa_context_errno(data->context)));
 391
 392             ppa_context_unref(data->context);
 393             data->context = NULL;
 394
 395             ppa_threaded_mainloop_unlock(data->loop);
 396             goto out;
 397         }
 398
 399         ppa_threaded_mainloop_wait(data->loop);
 400     }
 401     ppa_context_set_state_callback(data->context, context_state_callback2, device);
 402
 403     device->szDeviceName = strdup(device_name);
 404
 405     ppa_threaded_mainloop_unlock(data->loop);
 406     return ALC_TRUE;
 407
 408 out:
 409     if(data->loop)
 410     {
 411         ppa_threaded_mainloop_stop(data->loop);
 412         ppa_threaded_mainloop_free(data->loop);
 413     }
 414
 415     device->ExtraData = NULL;
 416     ppa_xfree(data);
 417     return ALC_FALSE;
 418 } //}}}
 419
 420 static void pulse_close(ALCdevice *device) //{{{
 421 {
 422     pulse_data *data = device->ExtraData;
 423
 424     ppa_threaded_mainloop_lock(data->loop);
 425
 426     if(data->stream)
 427     {
 428         ppa_stream_disconnect(data->stream);
 429         ppa_stream_unref(data->stream);
 430     }
 431
 432     ppa_context_disconnect(data->context);
 433     ppa_context_unref(data->context);
 434
 435     ppa_threaded_mainloop_unlock(data->loop);
 436
 437     ppa_threaded_mainloop_stop(data->loop);
 438     ppa_threaded_mainloop_free(data->loop);
 439
 440     DestroyRingBuffer(data->ring);
 441
 442     device->ExtraData = NULL;
 443     ppa_xfree(data);
 444 } //}}}
 445 //}}}
 446
 447 // OpenAL {{{
 448 static ALCboolean pulse_open_playback(ALCdevice *device, const ALCchar *device_name) //{{{
 449 {
 450     if(!device_name)
 451         device_name = pulse_device;
 452     else if(strcmp(device_name, pulse_device) != 0)
 453         return ALC_FALSE;
 454
 455     pulse_load();
 456     if(!pa_handle)
 457         return ALC_FALSE;
 458
 459     if(pulse_open(device, device_name) != ALC_FALSE)
 460         return ALC_TRUE;
 461
 462     pulse_unload();
 463     return ALC_FALSE;
 464 } //}}}
 465
 466 static void pulse_close_playback(ALCdevice *device) //{{{
 467 {
 468     pulse_close(device);
 469     pulse_unload();
 470 } //}}}
 471
 472 static ALCboolean pulse_reset_playback(ALCdevice *device) //{{{
 473 {
 474     pulse_data *data = device->ExtraData;
 475     pa_stream_state_t state;
 476     pa_channel_map chanmap;
 477
 478     ppa_threaded_mainloop_lock(data->loop);
 479
 480     data->frame_size = aluBytesFromFormat(device->Format) *
 481                        aluChannelsFromFormat(device->Format);
 482     data->attr.minreq = data->frame_size * device->UpdateSize;
 483     data->attr.prebuf = -1;
 484     data->attr.maxlength = -1;
 485     data->attr.fragsize = -1;
 486     data->attr.tlength = data->attr.minreq * device->NumUpdates;
 487     data->stream_name = "Playback Stream";
 488
 489     switch(aluBytesFromFormat(device->Format))
 490     {
 491         case 1:
 492             data->spec.format = PA_SAMPLE_U8;
 493             break;
 494         case 2:
 495             data->spec.format = PA_SAMPLE_S16NE;
 496             break;
 497         case 4:
 498             data->spec.format = PA_SAMPLE_FLOAT32NE;
 499             break;
 500         default:
 501             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 502             ppa_threaded_mainloop_unlock(data->loop);
 503             return ALC_FALSE;
 504     }
 505     data->spec.rate = device->Frequency;
 506     data->spec.channels = aluChannelsFromFormat(device->Format);
 507
 508     if(ppa_sample_spec_valid(&data->spec) == 0)
 509     {
 510         AL_PRINT("Invalid sample format\n");
 511         ppa_threaded_mainloop_unlock(data->loop);
 512         return ALC_FALSE;
 513     }
 514
 515     if(!ppa_channel_map_init_auto(&chanmap, data->spec.channels, PA_CHANNEL_MAP_WAVEEX))
 516     {
 517         AL_PRINT("Couldn't build map for channel count (%d)!", data->spec.channels);
 518         ppa_threaded_mainloop_unlock(data->loop);
 519         return ALC_FALSE;
 520     }
 521     SetDefaultWFXChannelOrder(device);
 522
 523     data->stream = ppa_stream_new(data->context, data->stream_name, &data->spec, &chanmap);
 524     if(!data->stream)
 525     {
 526         AL_PRINT("pa_stream_new() failed: %s\n",
 527                  ppa_strerror(ppa_context_errno(data->context)));
 528
 529         ppa_threaded_mainloop_unlock(data->loop);
 530         return ALC_FALSE;
 531     }
 532
 533     ppa_stream_set_state_callback(data->stream, stream_state_callback, device);
 534
 535     if(ppa_stream_connect_playback(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY, NULL, NULL) < 0)
 536     {
 537         AL_PRINT("Stream did not connect: %s\n",
 538                  ppa_strerror(ppa_context_errno(data->context)));
 539
 540         ppa_stream_unref(data->stream);
 541         data->stream = NULL;
 542
 543         ppa_threaded_mainloop_unlock(data->loop);
 544         return ALC_FALSE;
 545     }
 546
 547     while((state=ppa_stream_get_state(data->stream)) != PA_STREAM_READY)
 548     {
 549         if(!PA_STREAM_IS_GOOD(state))
 550         {
 551             AL_PRINT("Stream did not get ready: %s\n",
 552                      ppa_strerror(ppa_context_errno(data->context)));
 553
 554             ppa_stream_unref(data->stream);
 555             data->stream = NULL;
 556
 557             ppa_threaded_mainloop_unlock(data->loop);
 558             return ALC_FALSE;
 559         }
 560
 561         ppa_threaded_mainloop_wait(data->loop);
 562     }
 563     ppa_stream_set_state_callback(data->stream, stream_state_callback2, device);
 564
 565     stream_buffer_attr_callback(data->stream, device);
 566     ppa_stream_set_buffer_attr_callback(data->stream, stream_buffer_attr_callback, device);
 567
 568     stream_write_callback(data->stream, data->attr.tlength, device);
 569     ppa_stream_set_write_callback(data->stream, stream_write_callback, device);
 570
 571     ppa_threaded_mainloop_unlock(data->loop);
 572     return ALC_TRUE;
 573 } //}}}
 574
 575 static void pulse_stop_playback(ALCdevice *device) //{{{
 576 {
 577     pulse_data *data = device->ExtraData;
 578
 579     if(!data->stream)
 580         return;
 581
 582     ppa_threaded_mainloop_lock(data->loop);
 583
 584     ppa_stream_disconnect(data->stream);
 585     ppa_stream_unref(data->stream);
 586     data->stream = NULL;
 587
 588     ppa_threaded_mainloop_unlock(data->loop);
 589 } //}}}
 590
 591
 592 static ALCboolean pulse_open_capture(ALCdevice *device, const ALCchar *device_name) //{{{
 593 {
 594     pulse_data *data;
 595     pa_stream_state_t state;
 596
 597     if(!device_name)
 598         device_name = pulse_capture_device;
 599     else if(strcmp(device_name, pulse_capture_device) != 0)
 600         return ALC_FALSE;
 601
 602     pulse_load();
 603     if(!pa_handle)
 604         return ALC_FALSE;
 605
 606     if(pulse_open(device, device_name) == ALC_FALSE)
 607     {
 608         pulse_unload();
 609         return ALC_FALSE;
 610     }
 611
 612     data = device->ExtraData;
 613     ppa_threaded_mainloop_lock(data->loop);
 614
 615     data->samples = device->UpdateSize * device->NumUpdates;
 616     data->frame_size = aluBytesFromFormat(device->Format) *
 617                        aluChannelsFromFormat(device->Format);
 618
 619     if(!(data->ring = CreateRingBuffer(data->frame_size, data->samples)))
 620     {
 621         ppa_threaded_mainloop_unlock(data->loop);
 622         pulse_close(device);
 623         pulse_unload();
 624         return ALC_FALSE;
 625     }
 626
 627     data->attr.minreq = -1;
 628     data->attr.prebuf = -1;
 629     data->attr.maxlength = -1;
 630     data->attr.tlength = -1;
 631     data->attr.fragsize = data->frame_size * data->samples / 2;
 632     data->stream_name = "Capture Stream";
 633
 634     data->spec.rate = device->Frequency;
 635     data->spec.channels = aluChannelsFromFormat(device->Format);
 636
 637     switch(aluBytesFromFormat(device->Format))
 638     {
 639         case 1:
 640             data->spec.format = PA_SAMPLE_U8;
 641             break;
 642         case 2:
 643             data->spec.format = PA_SAMPLE_S16NE;
 644             break;
 645         case 4:
 646             data->spec.format = PA_SAMPLE_FLOAT32NE;
 647             break;
 648         default:
 649             AL_PRINT("Unknown format: 0x%x\n", device->Format);
 650             ppa_threaded_mainloop_unlock(data->loop);
 651             pulse_close(device);
 652             pulse_unload();
 653             return ALC_FALSE;
 654     }
 655
 656     if(ppa_sample_spec_valid(&data->spec) == 0)
 657     {
 658         AL_PRINT("Invalid sample format\n");
 659         ppa_threaded_mainloop_unlock(data->loop);
 660         pulse_close(device);
 661         pulse_unload();
 662         return ALC_FALSE;
 663     }
 664
 665     data->stream = ppa_stream_new(data->context, data->stream_name, &data->spec, NULL);
 666     if(!data->stream)
 667     {
 668         AL_PRINT("pa_stream_new() failed: %s\n",
 669                  ppa_strerror(ppa_context_errno(data->context)));
 670
 671         ppa_threaded_mainloop_unlock(data->loop);
 672         pulse_close(device);
 673         pulse_unload();
 674         return ALC_FALSE;
 675     }
 676
 677     ppa_stream_set_state_callback(data->stream, stream_state_callback, device);
 678
 679     if(ppa_stream_connect_record(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY) < 0)
 680     {
 681         AL_PRINT("Stream did not connect: %s\n",
 682                  ppa_strerror(ppa_context_errno(data->context)));
 683
 684         ppa_stream_unref(data->stream);
 685         ppa_threaded_mainloop_unlock(data->loop);
 686
 687         data->stream = NULL;
 688         pulse_close(device);
 689         pulse_unload();
 690         return ALC_FALSE;
 691     }
 692
 693     while((state=ppa_stream_get_state(data->stream)) != PA_STREAM_READY)
 694     {
 695         if(!PA_STREAM_IS_GOOD(state))
 696         {
 697             AL_PRINT("Stream did not get ready: %s\n",
 698                      ppa_strerror(ppa_context_errno(data->context)));
 699
 700             ppa_stream_unref(data->stream);
 701             data->stream = NULL;
 702
 703             ppa_threaded_mainloop_unlock(data->loop);
 704
 705             pulse_close(device);
 706             pulse_unload();
 707             return ALC_FALSE;
 708         }
 709
 710         ppa_threaded_mainloop_wait(data->loop);
 711     }
 712     ppa_stream_set_state_callback(data->stream, stream_state_callback2, device);
 713
 714     ppa_threaded_mainloop_unlock(data->loop);
 715     return ALC_TRUE;
 716 } //}}}
 717
 718 static void pulse_close_capture(ALCdevice *device) //{{{
 719 {
 720     pulse_close(device);
 721     pulse_unload();
 722 } //}}}
 723
 724 static void pulse_start_capture(ALCdevice *device) //{{{
 725 {
 726     pulse_data *data = device->ExtraData;
 727
 728     ppa_threaded_mainloop_lock(data->loop);
 729     ppa_stream_set_read_callback(data->stream, stream_read_callback, device);
 730     ppa_threaded_mainloop_unlock(data->loop);
 731 } //}}}
 732
 733 static void pulse_stop_capture(ALCdevice *device) //{{{
 734 {
 735     pulse_data *data = device->ExtraData;
 736
 737     ppa_threaded_mainloop_lock(data->loop);
 738     ppa_stream_set_read_callback(data->stream, NULL, NULL);
 739     ppa_threaded_mainloop_unlock(data->loop);
 740 } //}}}
 741
 742 static void pulse_capture_samples(ALCdevice *device, ALCvoid *buffer, ALCuint samples) //{{{
 743 {
 744     pulse_data *data = device->ExtraData;
 745     ALCuint available = RingBufferSize(data->ring);
 746
 747     if(available < samples)
 748         alcSetError(ALC_INVALID_VALUE);
 749     else
 750         ReadRingBuffer(data->ring, buffer, samples);
 751 } //}}}
 752
 753 static ALCuint pulse_available_samples(ALCdevice *device) //{{{
 754 {
 755     pulse_data *data = device->ExtraData;
 756     return RingBufferSize(data->ring);
 757 } //}}}
 758
 759 BackendFuncs pulse_funcs = { //{{{
 760     pulse_open_playback,
 761     pulse_close_playback,
 762     pulse_reset_playback,
 763     pulse_stop_playback,
 764     pulse_open_capture,
 765     pulse_close_capture,
 766     pulse_start_capture,
 767     pulse_stop_capture,
 768     pulse_capture_samples,
 769     pulse_available_samples
 770 }; //}}}
 771
 772 void alc_pulse_init(BackendFuncs *func_list) //{{{
 773 {
 774     *func_list = pulse_funcs;
 775 } //}}}
 776
 777 void alc_pulse_deinit(void) //{{{
 778 {
 779 } //}}}
 780
 781 void alc_pulse_probe(int type) //{{{
 782 {
 783     pulse_load();
 784     if(!pa_handle) return;
 785
 786     if(type == DEVICE_PROBE)
 787         AppendDeviceList(pulse_device);
 788     else if(type == ALL_DEVICE_PROBE)
 789         AppendAllDeviceList(pulse_device);
 790     else if(type == CAPTURE_DEVICE_PROBE)
 791         AppendCaptureDeviceList(pulse_capture_device);
 792
 793     pulse_unload();
 794 } //}}}
 795 //}}}