code.delx.au - pulseaudio/blob - src/modules/module-waveout.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <windows.h>
  27 #include <mmsystem.h>
  28 #include <assert.h>
  29
  30 #include <polyp/mainloop-api.h>
  31
  32 #include <polypcore/sink.h>
  33 #include <polypcore/source.h>
  34 #include <polypcore/module.h>
  35 #include <polypcore/modargs.h>
  36 #include <polypcore/sample-util.h>
  37 #include <polypcore/util.h>
  38 #include <polypcore/log.h>
  39 #include <polypcore/xmalloc.h>
  40
  41 #include "module-waveout-symdef.h"
  42
  43 PA_MODULE_AUTHOR("Pierre Ossman")
  44 PA_MODULE_DESCRIPTION("Windows waveOut Sink/Source")
  45 PA_MODULE_VERSION(PACKAGE_VERSION)
  46 PA_MODULE_USAGE("sink_name=<name for the sink> source_name=<name for the source> record=<enable source?> playback=<enable sink?> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
  47
  48 #define DEFAULT_SINK_NAME "wave_output"
  49 #define DEFAULT_SOURCE_NAME "wave_input"
  50
  51 #define WAVEOUT_MAX_VOLUME 0xFFFF
  52
  53 struct userdata {
  54     pa_sink *sink;
  55     pa_source *source;
  56     pa_core *core;
  57     pa_time_event *event;
  58     pa_defer_event *defer;
  59     pa_usec_t poll_timeout;
  60
  61     uint32_t fragments, fragment_size;
  62
  63     uint32_t free_ofrags, free_ifrags;
  64
  65     DWORD written_bytes;
  66
  67     int cur_ohdr, cur_ihdr;
  68     unsigned int oremain;
  69     WAVEHDR *ohdrs, *ihdrs;
  70     pa_memchunk silence;
  71
  72     HWAVEOUT hwo;
  73     HWAVEIN hwi;
  74     pa_module *module;
  75
  76     CRITICAL_SECTION crit;
  77 };
  78
  79 static const char* const valid_modargs[] = {
  80     "sink_name",
  81     "source_name",
  82     "record",
  83     "playback",
  84     "fragments",
  85     "fragment_size",
  86     "format",
  87     "rate",
  88     "channels",
  89     NULL
  90 };
  91
  92 static void update_usage(struct userdata *u) {
  93    pa_module_set_used(u->module,
  94                       (u->sink ? pa_idxset_size(u->sink->inputs) : 0) +
  95                       (u->sink ? pa_idxset_size(u->sink->monitor_source->outputs) : 0) +
  96                       (u->source ? pa_idxset_size(u->source->outputs) : 0));
  97 }
  98
  99 static void do_write(struct userdata *u)
 100 {
 101     uint32_t free_frags, remain;
 102     pa_memchunk memchunk, *cur_chunk;
 103     WAVEHDR *hdr;
 104     MMRESULT res;
 105
 106     if (!u->sink)
 107         return;
 108
 109     EnterCriticalSection(&u->crit);
 110
 111     free_frags = u->free_ofrags;
 112     u->free_ofrags = 0;
 113
 114     LeaveCriticalSection(&u->crit);
 115
 116     while (free_frags) {
 117         hdr = &u->ohdrs[u->cur_ohdr];
 118         if (hdr->dwFlags & WHDR_PREPARED)
 119             waveOutUnprepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
 120
 121         remain = u->oremain;
 122         while (remain) {
 123             cur_chunk = &memchunk;
 124
 125             if (pa_sink_render(u->sink, remain, cur_chunk) < 0) {
 126                 /*
 127                  * Don't fill with silence unless we're getting close to
 128                  * underflowing.
 129                  */
 130                 if (free_frags > u->fragments/2)
 131                     cur_chunk = &u->silence;
 132                 else {
 133                     EnterCriticalSection(&u->crit);
 134
 135                     u->free_ofrags += free_frags;
 136
 137                     LeaveCriticalSection(&u->crit);
 138
 139                     u->oremain = remain;
 140                     return;
 141                 }
 142             }
 143
 144             assert(cur_chunk->memblock);
 145             assert(cur_chunk->memblock->data);
 146             assert(cur_chunk->length);
 147
 148             memcpy(hdr->lpData + u->fragment_size - remain,
 149                 (char*)cur_chunk->memblock->data + cur_chunk->index,
 150                 (cur_chunk->length < remain)?cur_chunk->length:remain);
 151
 152             remain -= (cur_chunk->length < remain)?cur_chunk->length:remain;
 153
 154             if (cur_chunk != &u->silence) {
 155                 pa_memblock_unref(cur_chunk->memblock);
 156                 cur_chunk->memblock = NULL;
 157             }
 158         }
 159
 160         res = waveOutPrepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
 161         if (res != MMSYSERR_NOERROR) {
 162             pa_log_error(__FILE__ ": ERROR: Unable to prepare waveOut block: %d\n",
 163                 res);
 164         }
 165         res = waveOutWrite(u->hwo, hdr, sizeof(WAVEHDR));
 166         if (res != MMSYSERR_NOERROR) {
 167             pa_log_error(__FILE__ ": ERROR: Unable to write waveOut block: %d\n",
 168                 res);
 169         }
 170
 171         u->written_bytes += u->fragment_size;
 172
 173         free_frags--;
 174         u->cur_ohdr++;
 175         u->cur_ohdr %= u->fragments;
 176         u->oremain = u->fragment_size;
 177     }
 178 }
 179
 180 static void do_read(struct userdata *u)
 181 {
 182     uint32_t free_frags;
 183     pa_memchunk memchunk;
 184     WAVEHDR *hdr;
 185     MMRESULT res;
 186
 187     if (!u->source)
 188         return;
 189
 190     EnterCriticalSection(&u->crit);
 191
 192     free_frags = u->free_ifrags;
 193     u->free_ifrags = 0;
 194
 195     LeaveCriticalSection(&u->crit);
 196
 197     while (free_frags) {
 198         hdr = &u->ihdrs[u->cur_ihdr];
 199         if (hdr->dwFlags & WHDR_PREPARED)
 200             waveInUnprepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
 201
 202         if (hdr->dwBytesRecorded) {
 203             memchunk.memblock = pa_memblock_new(hdr->dwBytesRecorded, u->core->memblock_stat);
 204             assert(memchunk.memblock);
 205
 206             memcpy((char*)memchunk.memblock->data, hdr->lpData, hdr->dwBytesRecorded);
 207
 208             memchunk.length = memchunk.memblock->length = hdr->dwBytesRecorded;
 209             memchunk.index = 0;
 210
 211             pa_source_post(u->source, &memchunk);
 212             pa_memblock_unref(memchunk.memblock);
 213         }
 214
 215         res = waveInPrepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
 216         if (res != MMSYSERR_NOERROR) {
 217             pa_log_error(__FILE__ ": ERROR: Unable to prepare waveIn block: %d\n",
 218                 res);
 219         }
 220         res = waveInAddBuffer(u->hwi, hdr, sizeof(WAVEHDR));
 221         if (res != MMSYSERR_NOERROR) {
 222             pa_log_error(__FILE__ ": ERROR: Unable to add waveIn block: %d\n",
 223                 res);
 224         }
 225
 226         free_frags--;
 227         u->cur_ihdr++;
 228         u->cur_ihdr %= u->fragments;
 229     }
 230 }
 231
 232 static void poll_cb(pa_mainloop_api*a, pa_time_event *e, const struct timeval *tv, void *userdata) {
 233     struct userdata *u = userdata;
 234     struct timeval ntv;
 235
 236     assert(u);
 237
 238     update_usage(u);
 239
 240     do_write(u);
 241     do_read(u);
 242
 243     pa_gettimeofday(&ntv);
 244     pa_timeval_add(&ntv, u->poll_timeout);
 245
 246     a->time_restart(e, &ntv);
 247 }
 248
 249 static void defer_cb(pa_mainloop_api*a, pa_defer_event *e, void *userdata) {
 250     struct userdata *u = userdata;
 251
 252     assert(u);
 253
 254     a->defer_enable(e, 0);
 255
 256     do_write(u);
 257     do_read(u);
 258 }
 259
 260 static void CALLBACK chunk_done_cb(HWAVEOUT hwo, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
 261     struct userdata *u = (struct userdata *)inst;
 262
 263     if (msg != WOM_DONE)
 264         return;
 265
 266     EnterCriticalSection(&u->crit);
 267
 268     u->free_ofrags++;
 269     assert(u->free_ofrags <= u->fragments);
 270
 271     LeaveCriticalSection(&u->crit);
 272 }
 273
 274 static void CALLBACK chunk_ready_cb(HWAVEIN hwi, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
 275     struct userdata *u = (struct userdata *)inst;
 276
 277     if (msg != WIM_DATA)
 278         return;
 279
 280     EnterCriticalSection(&u->crit);
 281
 282     u->free_ifrags++;
 283     assert(u->free_ifrags <= u->fragments);
 284
 285     LeaveCriticalSection(&u->crit);
 286 }
 287
 288 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 289     struct userdata *u = s->userdata;
 290     uint32_t free_frags;
 291     MMTIME mmt;
 292     assert(s && u && u->sink);
 293
 294     memset(&mmt, 0, sizeof(mmt));
 295     mmt.wType = TIME_BYTES;
 296     if (waveOutGetPosition(u->hwo, &mmt, sizeof(mmt)) == MMSYSERR_NOERROR)
 297         return pa_bytes_to_usec(u->written_bytes - mmt.u.cb, &s->sample_spec);
 298     else {
 299         EnterCriticalSection(&u->crit);
 300
 301         free_frags = u->free_ofrags;
 302
 303         LeaveCriticalSection(&u->crit);
 304
 305         return pa_bytes_to_usec((u->fragments - free_frags) * u->fragment_size,
 306                               &s->sample_spec);
 307     }
 308 }
 309
 310 static pa_usec_t source_get_latency_cb(pa_source *s) {
 311     pa_usec_t r = 0;
 312     struct userdata *u = s->userdata;
 313     uint32_t free_frags;
 314     assert(s && u && u->sink);
 315
 316     EnterCriticalSection(&u->crit);
 317
 318     free_frags = u->free_ifrags;
 319
 320     LeaveCriticalSection(&u->crit);
 321
 322     r += pa_bytes_to_usec((free_frags + 1) * u->fragment_size, &s->sample_spec);
 323
 324     return r;
 325 }
 326
 327 static void notify_sink_cb(pa_sink *s) {
 328     struct userdata *u = s->userdata;
 329     assert(u);
 330
 331     u->core->mainloop->defer_enable(u->defer, 1);
 332 }
 333
 334 static void notify_source_cb(pa_source *s) {
 335     struct userdata *u = s->userdata;
 336     assert(u);
 337
 338     u->core->mainloop->defer_enable(u->defer, 1);
 339 }
 340
 341 static int sink_get_hw_volume_cb(pa_sink *s) {
 342     struct userdata *u = s->userdata;
 343     DWORD vol;
 344     pa_volume_t left, right;
 345
 346     if (waveOutGetVolume(u->hwo, &vol) != MMSYSERR_NOERROR)
 347         return -1;
 348
 349     left = (vol & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
 350     right = ((vol >> 16) & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
 351
 352     /* Windows supports > 2 channels, except for volume control */
 353     if (s->hw_volume.channels > 2)
 354         pa_cvolume_set(&s->hw_volume, s->hw_volume.channels, (left + right)/2);
 355
 356     s->hw_volume.values[0] = left;
 357     if (s->hw_volume.channels > 1)
 358         s->hw_volume.values[1] = right;
 359
 360     return 0;
 361 }
 362
 363 static int sink_set_hw_volume_cb(pa_sink *s) {
 364     struct userdata *u = s->userdata;
 365     DWORD vol;
 366
 367     vol = s->hw_volume.values[0] * WAVEOUT_MAX_VOLUME / PA_VOLUME_NORM;
 368     if (s->hw_volume.channels > 1)
 369         vol |= (s->hw_volume.values[0] * WAVEOUT_MAX_VOLUME / PA_VOLUME_NORM) << 16;
 370
 371     if (waveOutSetVolume(u->hwo, vol) != MMSYSERR_NOERROR)
 372         return -1;
 373
 374     return 0;
 375 }
 376
 377 static int ss_to_waveformat(pa_sample_spec *ss, LPWAVEFORMATEX wf) {
 378     wf->wFormatTag = WAVE_FORMAT_PCM;
 379
 380     if (ss->channels > 2) {
 381         pa_log_error(__FILE__": ERROR: More than two channels not supported.\n");
 382         return -1;
 383     }
 384
 385     wf->nChannels = ss->channels;
 386
 387     switch (ss->rate) {
 388     case 8000:
 389     case 11025:
 390     case 22005:
 391     case 44100:
 392         break;
 393     default:
 394         pa_log_error(__FILE__": ERROR: Unsupported sample rate.\n");
 395         return -1;
 396     }
 397
 398     wf->nSamplesPerSec = ss->rate;
 399
 400     if (ss->format == PA_SAMPLE_U8)
 401         wf->wBitsPerSample = 8;
 402     else if (ss->format == PA_SAMPLE_S16NE)
 403         wf->wBitsPerSample = 16;
 404     else {
 405         pa_log_error(__FILE__": ERROR: Unsupported sample format.\n");
 406         return -1;
 407     }
 408
 409     wf->nBlockAlign = wf->nChannels * wf->wBitsPerSample/8;
 410     wf->nAvgBytesPerSec = wf->nSamplesPerSec * wf->nBlockAlign;
 411
 412     wf->cbSize = 0;
 413
 414     return 0;
 415 }
 416
 417 int pa__init(pa_core *c, pa_module*m) {
 418     struct userdata *u = NULL;
 419     HWAVEOUT hwo = INVALID_HANDLE_VALUE;
 420     HWAVEIN hwi = INVALID_HANDLE_VALUE;
 421     WAVEFORMATEX wf;
 422     int nfrags, frag_size;
 423     int record = 1, playback = 1;
 424     pa_sample_spec ss;
 425     pa_modargs *ma = NULL;
 426     unsigned int i;
 427     struct timeval tv;
 428
 429     assert(c && m);
 430
 431     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 432         pa_log(__FILE__": failed to parse module arguments.\n");
 433         goto fail;
 434     }
 435
 436     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 437         pa_log(__FILE__": record= and playback= expect boolean argument.\n");
 438         goto fail;
 439     }
 440
 441     if (!playback && !record) {
 442         pa_log(__FILE__": neither playback nor record enabled for device.\n");
 443         goto fail;
 444     }
 445
 446     nfrags = 20;
 447     frag_size = 1024;
 448     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 449         pa_log(__FILE__": failed to parse fragments arguments\n");
 450         goto fail;
 451     }
 452
 453     ss = c->default_sample_spec;
 454     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 455         pa_log(__FILE__": failed to parse sample specification\n");
 456         goto fail;
 457     }
 458
 459     if (ss_to_waveformat(&ss, &wf) < 0)
 460         goto fail;
 461
 462     u = pa_xmalloc(sizeof(struct userdata));
 463
 464     if (record) {
 465         if (waveInOpen(&hwi, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_ready_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
 466             goto fail;
 467         if (waveInStart(hwi) != MMSYSERR_NOERROR)
 468             goto fail;
 469         pa_log_debug(__FILE__": Opened waveIn subsystem.\n");
 470     }
 471
 472     if (playback) {
 473         if (waveOutOpen(&hwo, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_done_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
 474             goto fail;
 475         pa_log_debug(__FILE__": Opened waveOut subsystem.\n");
 476     }
 477
 478     InitializeCriticalSection(&u->crit);
 479
 480     if (hwi != INVALID_HANDLE_VALUE) {
 481         u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, NULL);
 482         assert(u->source);
 483         u->source->userdata = u;
 484         u->source->notify = notify_source_cb;
 485         u->source->get_latency = source_get_latency_cb;
 486         pa_source_set_owner(u->source, m);
 487         u->source->description = pa_sprintf_malloc("Windows waveIn PCM");
 488     } else
 489         u->source = NULL;
 490
 491     if (hwo != INVALID_HANDLE_VALUE) {
 492         u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL);
 493         assert(u->sink);
 494         u->sink->notify = notify_sink_cb;
 495         u->sink->get_latency = sink_get_latency_cb;
 496         u->sink->get_hw_volume = sink_get_hw_volume_cb;
 497         u->sink->set_hw_volume = sink_set_hw_volume_cb;
 498         u->sink->userdata = u;
 499         pa_sink_set_owner(u->sink, m);
 500         u->sink->description = pa_sprintf_malloc("Windows waveOut PCM");
 501     } else
 502         u->sink = NULL;
 503
 504     assert(u->source || u->sink);
 505
 506     u->core = c;
 507     u->hwi = hwi;
 508     u->hwo = hwo;
 509
 510     u->fragments = nfrags;
 511     u->free_ifrags = u->fragments;
 512     u->free_ofrags = u->fragments;
 513     u->fragment_size = frag_size - (frag_size % pa_frame_size(&ss));
 514
 515     u->written_bytes = 0;
 516
 517     u->oremain = u->fragment_size;
 518
 519     u->poll_timeout = pa_bytes_to_usec(u->fragments * u->fragment_size / 3, &ss);
 520
 521     pa_gettimeofday(&tv);
 522     pa_timeval_add(&tv, u->poll_timeout);
 523
 524     u->event = c->mainloop->time_new(c->mainloop, &tv, poll_cb, u);
 525     assert(u->event);
 526
 527     u->defer = c->mainloop->defer_new(c->mainloop, defer_cb, u);
 528     assert(u->defer);
 529     c->mainloop->defer_enable(u->defer, 0);
 530
 531     u->cur_ihdr = 0;
 532     u->cur_ohdr = 0;
 533     u->ihdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
 534     assert(u->ihdrs);
 535     u->ohdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
 536     assert(u->ohdrs);
 537     for (i = 0;i < u->fragments;i++) {
 538         u->ihdrs[i].dwBufferLength = u->fragment_size;
 539         u->ohdrs[i].dwBufferLength = u->fragment_size;
 540         u->ihdrs[i].lpData = pa_xmalloc(u->fragment_size);
 541         assert(u->ihdrs);
 542         u->ohdrs[i].lpData = pa_xmalloc(u->fragment_size);
 543         assert(u->ohdrs);
 544     }
 545
 546     u->silence.length = u->fragment_size;
 547     u->silence.memblock = pa_memblock_new(u->silence.length, u->core->memblock_stat);
 548     assert(u->silence.memblock);
 549     pa_silence_memblock(u->silence.memblock, &ss);
 550     u->silence.index = 0;
 551
 552     u->module = m;
 553     m->userdata = u;
 554
 555     pa_modargs_free(ma);
 556
 557     return 0;
 558
 559 fail:
 560    if (hwi != INVALID_HANDLE_VALUE)
 561         waveInClose(hwi);
 562
 563    if (hwo != INVALID_HANDLE_VALUE)
 564         waveOutClose(hwo);
 565
 566     if (u)
 567         pa_xfree(u);
 568
 569     if (ma)
 570         pa_modargs_free(ma);
 571
 572     return -1;
 573 }
 574
 575 void pa__done(pa_core *c, pa_module*m) {
 576     struct userdata *u;
 577     unsigned int i;
 578
 579     assert(c && m);
 580
 581     if (!(u = m->userdata))
 582         return;
 583
 584     if (u->event)
 585         c->mainloop->time_free(u->event);
 586
 587     if (u->defer)
 588         c->mainloop->defer_free(u->defer);
 589
 590     if (u->sink) {
 591         pa_sink_disconnect(u->sink);
 592         pa_sink_unref(u->sink);
 593     }
 594
 595     if (u->source) {
 596         pa_source_disconnect(u->source);
 597         pa_source_unref(u->source);
 598     }
 599
 600     if (u->hwi != INVALID_HANDLE_VALUE) {
 601         waveInReset(u->hwi);
 602         waveInClose(u->hwi);
 603     }
 604
 605     if (u->hwo != INVALID_HANDLE_VALUE) {
 606         waveOutReset(u->hwo);
 607         waveOutClose(u->hwo);
 608     }
 609
 610     for (i = 0;i < u->fragments;i++) {
 611         pa_xfree(u->ihdrs[i].lpData);
 612         pa_xfree(u->ohdrs[i].lpData);
 613     }
 614
 615     pa_xfree(u->ihdrs);
 616     pa_xfree(u->ohdrs);
 617
 618     DeleteCriticalSection(&u->crit);
 619
 620     pa_xfree(u);
 621 }