code.delx.au - pulseaudio/blob - polyp/module-waveout.c

   1 /* $Id: module-waveout.c 333 2005-01-08 21:36:53Z lennart $ */
   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 "sink.h"
  31 #include "source.h"
  32 #include "module.h"
  33 #include "mainloop-api.h"
  34 #include "modargs.h"
  35 #include "sample-util.h"
  36 #include "util.h"
  37 #include "log.h"
  38 #include "xmalloc.h"
  39 #include "module-waveout-symdef.h"
  40
  41 PA_MODULE_AUTHOR("Pierre Ossman")
  42 PA_MODULE_DESCRIPTION("Windows waveOut Sink/Source")
  43 PA_MODULE_VERSION(PACKAGE_VERSION)
  44 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>")
  45
  46 #define PA_TYPEID_WAVEOUT PA_TYPEID_MAKE('W', 'A', 'V', 'E')
  47
  48 #define DEFAULT_SINK_NAME "wave_output"
  49 #define DEFAULT_SOURCE_NAME "wave_input"
  50
  51 struct userdata {
  52     struct pa_sink *sink;
  53     struct pa_source *source;
  54     struct pa_core *core;
  55     struct pa_time_event *event;
  56     struct pa_defer_event *defer;
  57     pa_usec_t poll_timeout;
  58
  59     uint32_t fragments, fragment_size;
  60
  61     uint32_t free_ofrags, free_ifrags;
  62
  63     DWORD written_bytes;
  64
  65     int cur_ohdr, cur_ihdr;
  66     unsigned int oremain;
  67     WAVEHDR *ohdrs, *ihdrs;
  68     struct pa_memchunk silence;
  69
  70     HWAVEOUT hwo;
  71     HWAVEIN hwi;
  72     struct pa_module *module;
  73
  74     CRITICAL_SECTION crit;
  75 };
  76
  77 static const char* const valid_modargs[] = {
  78     "sink_name",
  79     "source_name",
  80     "record",
  81     "playback",
  82     "fragments",
  83     "fragment_size",
  84     "format",
  85     "rate",
  86     "channels",
  87     NULL
  88 };
  89
  90 static void update_usage(struct userdata *u) {
  91    pa_module_set_used(u->module,
  92                       (u->sink ? pa_idxset_ncontents(u->sink->inputs) : 0) +
  93                       (u->sink ? pa_idxset_ncontents(u->sink->monitor_source->outputs) : 0) +
  94                       (u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
  95 }
  96
  97 static void do_write(struct userdata *u)
  98 {
  99     uint32_t free_frags, remain;
 100     struct pa_memchunk memchunk, *cur_chunk;
 101     WAVEHDR *hdr;
 102     MMRESULT res;
 103
 104     if (!u->sink)
 105         return;
 106
 107     EnterCriticalSection(&u->crit);
 108
 109     free_frags = u->free_ofrags;
 110     u->free_ofrags = 0;
 111
 112     LeaveCriticalSection(&u->crit);
 113
 114     while (free_frags) {
 115         hdr = &u->ohdrs[u->cur_ohdr];
 116         if (hdr->dwFlags & WHDR_PREPARED)
 117             waveOutUnprepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
 118
 119         remain = u->oremain;
 120         while (remain) {
 121             cur_chunk = &memchunk;
 122
 123             if (pa_sink_render(u->sink, remain, cur_chunk) < 0) {
 124                 /*
 125                  * Don't fill with silence unless we're getting close to
 126                  * underflowing.
 127                  */
 128                 if (free_frags > u->fragments/2)
 129                     cur_chunk = &u->silence;
 130                 else {
 131                     EnterCriticalSection(&u->crit);
 132
 133                     u->free_ofrags += free_frags;
 134
 135                     LeaveCriticalSection(&u->crit);
 136
 137                     u->oremain = remain;
 138                     return;
 139                 }
 140             }
 141
 142             assert(cur_chunk->memblock);
 143             assert(cur_chunk->memblock->data);
 144             assert(cur_chunk->length);
 145
 146             memcpy(hdr->lpData + u->fragment_size - remain,
 147                 (char*)cur_chunk->memblock->data + cur_chunk->index,
 148                 (cur_chunk->length < remain)?cur_chunk->length:remain);
 149
 150             remain -= (cur_chunk->length < remain)?cur_chunk->length:remain;
 151
 152             if (cur_chunk != &u->silence) {
 153                 pa_memblock_unref(cur_chunk->memblock);
 154                 cur_chunk->memblock = NULL;
 155             }
 156         }
 157
 158         res = waveOutPrepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
 159         if (res != MMSYSERR_NOERROR) {
 160             pa_log_error(__FILE__ ": ERROR: Unable to prepare waveOut block: %d\n",
 161                 res);
 162         }
 163         res = waveOutWrite(u->hwo, hdr, sizeof(WAVEHDR));
 164         if (res != MMSYSERR_NOERROR) {
 165             pa_log_error(__FILE__ ": ERROR: Unable to write waveOut block: %d\n",
 166                 res);
 167         }
 168
 169         u->written_bytes += u->fragment_size;
 170
 171         free_frags--;
 172         u->cur_ohdr++;
 173         u->cur_ohdr %= u->fragments;
 174         u->oremain = u->fragment_size;
 175     }
 176 }
 177
 178 static void do_read(struct userdata *u)
 179 {
 180     uint32_t free_frags;
 181     struct pa_memchunk memchunk;
 182     WAVEHDR *hdr;
 183     MMRESULT res;
 184
 185     if (!u->source)
 186         return;
 187
 188     EnterCriticalSection(&u->crit);
 189
 190     free_frags = u->free_ifrags;
 191     u->free_ifrags = 0;
 192
 193     LeaveCriticalSection(&u->crit);
 194
 195     while (free_frags) {
 196         hdr = &u->ihdrs[u->cur_ihdr];
 197         if (hdr->dwFlags & WHDR_PREPARED)
 198             waveInUnprepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
 199
 200         if (hdr->dwBytesRecorded) {
 201             memchunk.memblock = pa_memblock_new(hdr->dwBytesRecorded, u->core->memblock_stat);
 202             assert(memchunk.memblock);
 203
 204             memcpy((char*)memchunk.memblock->data, hdr->lpData, hdr->dwBytesRecorded);
 205
 206             memchunk.length = memchunk.memblock->length = hdr->dwBytesRecorded;
 207             memchunk.index = 0;
 208
 209             pa_source_post(u->source, &memchunk);
 210             pa_memblock_unref(memchunk.memblock);
 211         }
 212
 213         res = waveInPrepareHeader(u->hwi, hdr, sizeof(WAVEHDR));
 214         if (res != MMSYSERR_NOERROR) {
 215             pa_log_error(__FILE__ ": ERROR: Unable to prepare waveIn block: %d\n",
 216                 res);
 217         }
 218         res = waveInAddBuffer(u->hwi, hdr, sizeof(WAVEHDR));
 219         if (res != MMSYSERR_NOERROR) {
 220             pa_log_error(__FILE__ ": ERROR: Unable to add waveIn block: %d\n",
 221                 res);
 222         }
 223
 224         free_frags--;
 225         u->cur_ihdr++;
 226         u->cur_ihdr %= u->fragments;
 227     }
 228 }
 229
 230 static void poll_cb(struct pa_mainloop_api*a, struct pa_time_event *e, const struct timeval *tv, void *userdata) {
 231     struct userdata *u = userdata;
 232     struct timeval ntv;
 233
 234     assert(u);
 235
 236     update_usage(u);
 237
 238     do_write(u);
 239     do_read(u);
 240
 241     pa_gettimeofday(&ntv);
 242     pa_timeval_add(&ntv, u->poll_timeout);
 243
 244     a->time_restart(e, &ntv);
 245 }
 246
 247 static void defer_cb(struct pa_mainloop_api*a, struct pa_defer_event *e, void *userdata) {
 248     struct userdata *u = userdata;
 249
 250     assert(u);
 251
 252     a->defer_enable(e, 0);
 253
 254     do_write(u);
 255     do_read(u);
 256 }
 257
 258 static void CALLBACK chunk_done_cb(HWAVEOUT hwo, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
 259     struct userdata *u = (struct userdata *)inst;
 260
 261     if (msg != WOM_DONE)
 262         return;
 263
 264     EnterCriticalSection(&u->crit);
 265
 266     u->free_ofrags++;
 267     assert(u->free_ofrags <= u->fragments);
 268
 269     LeaveCriticalSection(&u->crit);
 270 }
 271
 272 static void CALLBACK chunk_ready_cb(HWAVEIN hwi, UINT msg, DWORD_PTR inst, DWORD param1, DWORD param2) {
 273     struct userdata *u = (struct userdata *)inst;
 274
 275     if (msg != WIM_DATA)
 276         return;
 277
 278     EnterCriticalSection(&u->crit);
 279
 280     u->free_ifrags++;
 281     assert(u->free_ifrags <= u->fragments);
 282
 283     LeaveCriticalSection(&u->crit);
 284 }
 285
 286 static pa_usec_t sink_get_latency_cb(struct pa_sink *s) {
 287     struct userdata *u = s->userdata;
 288     uint32_t free_frags;
 289     MMTIME mmt;
 290     assert(s && u && u->sink);
 291
 292     memset(&mmt, 0, sizeof(mmt));
 293     mmt.wType = TIME_BYTES;
 294     if (waveOutGetPosition(u->hwo, &mmt, sizeof(mmt)) == MMSYSERR_NOERROR)
 295         return pa_bytes_to_usec(u->written_bytes - mmt.u.cb, &s->sample_spec);
 296     else {
 297         EnterCriticalSection(&u->crit);
 298
 299         free_frags = u->free_ofrags;
 300
 301         LeaveCriticalSection(&u->crit);
 302
 303         return pa_bytes_to_usec((u->fragments - free_frags) * u->fragment_size,
 304                               &s->sample_spec);
 305     }
 306 }
 307
 308 static pa_usec_t source_get_latency_cb(struct pa_source *s) {
 309     pa_usec_t r = 0;
 310     struct userdata *u = s->userdata;
 311     uint32_t free_frags;
 312     assert(s && u && u->sink);
 313
 314     EnterCriticalSection(&u->crit);
 315
 316     free_frags = u->free_ifrags;
 317
 318     LeaveCriticalSection(&u->crit);
 319
 320     r += pa_bytes_to_usec((free_frags + 1) * u->fragment_size, &s->sample_spec);
 321
 322     fprintf(stderr, "Latency: %d us\n", (int)r);
 323
 324     return r;
 325 }
 326
 327 static void notify_sink_cb(struct 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(struct 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 ss_to_waveformat(struct pa_sample_spec *ss, LPWAVEFORMATEX wf) {
 342     wf->wFormatTag = WAVE_FORMAT_PCM;
 343
 344     if (ss->channels > 2) {
 345         pa_log_error(__FILE__": ERROR: More than two channels not supported.\n");
 346         return -1;
 347     }
 348
 349     wf->nChannels = ss->channels;
 350
 351     switch (ss->rate) {
 352     case 8000:
 353     case 11025:
 354     case 22005:
 355     case 44100:
 356         break;
 357     default:
 358         pa_log_error(__FILE__": ERROR: Unsupported sample rate.\n");
 359         return -1;
 360     }
 361
 362     wf->nSamplesPerSec = ss->rate;
 363
 364     if (ss->format == PA_SAMPLE_U8)
 365         wf->wBitsPerSample = 8;
 366     else if (ss->format == PA_SAMPLE_S16NE)
 367         wf->wBitsPerSample = 16;
 368     else {
 369         pa_log_error(__FILE__": ERROR: Unsupported sample format.\n");
 370         return -1;
 371     }
 372
 373     wf->nBlockAlign = wf->nChannels * wf->wBitsPerSample/8;
 374     wf->nAvgBytesPerSec = wf->nSamplesPerSec * wf->nBlockAlign;
 375
 376     wf->cbSize = 0;
 377
 378     return 0;
 379 }
 380
 381 int pa__init(struct pa_core *c, struct pa_module*m) {
 382     struct userdata *u = NULL;
 383     HWAVEOUT hwo = INVALID_HANDLE_VALUE;
 384     HWAVEIN hwi = INVALID_HANDLE_VALUE;
 385     WAVEFORMATEX wf;
 386     int nfrags, frag_size;
 387     int record = 1, playback = 1;
 388     struct pa_sample_spec ss;
 389     struct pa_modargs *ma = NULL;
 390     unsigned int i;
 391     struct timeval tv;
 392
 393     assert(c && m);
 394
 395     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 396         pa_log(__FILE__": failed to parse module arguments.\n");
 397         goto fail;
 398     }
 399
 400     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 401         pa_log(__FILE__": record= and playback= expect boolean argument.\n");
 402         goto fail;
 403     }
 404
 405     if (!playback && !record) {
 406         pa_log(__FILE__": neither playback nor record enabled for device.\n");
 407         goto fail;
 408     }
 409
 410     nfrags = 20;
 411     frag_size = 1024;
 412     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 413         pa_log(__FILE__": failed to parse fragments arguments\n");
 414         goto fail;
 415     }
 416
 417     ss = c->default_sample_spec;
 418     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 419         pa_log(__FILE__": failed to parse sample specification\n");
 420         goto fail;
 421     }
 422
 423     if (ss_to_waveformat(&ss, &wf) < 0)
 424         goto fail;
 425
 426     u = pa_xmalloc(sizeof(struct userdata));
 427
 428     if (record) {
 429         if (waveInOpen(&hwi, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_ready_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
 430             goto fail;
 431         if (waveInStart(hwi) != MMSYSERR_NOERROR)
 432             goto fail;
 433         pa_log_debug(__FILE__": Opened waveIn subsystem.\n");
 434     }
 435
 436     if (playback) {
 437         if (waveOutOpen(&hwo, WAVE_MAPPER, &wf, (DWORD_PTR)chunk_done_cb, (DWORD_PTR)u, CALLBACK_FUNCTION) != MMSYSERR_NOERROR)
 438             goto fail;
 439         pa_log_debug(__FILE__": Opened waveOut subsystem.\n");
 440     }
 441
 442     InitializeCriticalSection(&u->crit);
 443
 444     if (hwi != INVALID_HANDLE_VALUE) {
 445         u->source = pa_source_new(c, PA_TYPEID_WAVEOUT, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
 446         assert(u->source);
 447         u->source->userdata = u;
 448         u->source->notify = notify_source_cb;
 449         u->source->get_latency = source_get_latency_cb;
 450         pa_source_set_owner(u->source, m);
 451         u->source->description = pa_sprintf_malloc("Windows waveIn PCM");
 452     } else
 453         u->source = NULL;
 454
 455     if (hwo != INVALID_HANDLE_VALUE) {
 456         u->sink = pa_sink_new(c, PA_TYPEID_WAVEOUT, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss);
 457         assert(u->sink);
 458         u->sink->notify = notify_sink_cb;
 459         u->sink->get_latency = sink_get_latency_cb;
 460         u->sink->userdata = u;
 461         pa_sink_set_owner(u->sink, m);
 462         u->sink->description = pa_sprintf_malloc("Windows waveOut PCM");
 463     } else
 464         u->sink = NULL;
 465
 466     assert(u->source || u->sink);
 467
 468     u->core = c;
 469     u->hwi = hwi;
 470     u->hwo = hwo;
 471
 472     u->fragments = nfrags;
 473     u->free_ifrags = u->fragments;
 474     u->free_ofrags = u->fragments;
 475     u->fragment_size = frag_size - (frag_size % pa_frame_size(&ss));
 476
 477     u->written_bytes = 0;
 478
 479     u->oremain = u->fragment_size;
 480
 481     u->poll_timeout = pa_bytes_to_usec(u->fragments * u->fragment_size / 3, &ss);
 482
 483     pa_gettimeofday(&tv);
 484     pa_timeval_add(&tv, u->poll_timeout);
 485
 486     u->event = c->mainloop->time_new(c->mainloop, &tv, poll_cb, u);
 487     assert(u->event);
 488
 489     u->defer = c->mainloop->defer_new(c->mainloop, defer_cb, u);
 490     assert(u->defer);
 491     c->mainloop->defer_enable(u->defer, 0);
 492
 493     u->cur_ihdr = 0;
 494     u->cur_ohdr = 0;
 495     u->ihdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
 496     assert(u->ihdrs);
 497     u->ohdrs = pa_xmalloc0(sizeof(WAVEHDR) * u->fragments);
 498     assert(u->ohdrs);
 499     for (i = 0;i < u->fragments;i++) {
 500         u->ihdrs[i].dwBufferLength = u->fragment_size;
 501         u->ohdrs[i].dwBufferLength = u->fragment_size;
 502         u->ihdrs[i].lpData = pa_xmalloc(u->fragment_size);
 503         assert(u->ihdrs);
 504         u->ohdrs[i].lpData = pa_xmalloc(u->fragment_size);
 505         assert(u->ohdrs);
 506     }
 507
 508     u->silence.length = u->fragment_size;
 509     u->silence.memblock = pa_memblock_new(u->silence.length, u->core->memblock_stat);
 510     assert(u->silence.memblock);
 511     pa_silence_memblock(u->silence.memblock, &ss);
 512     u->silence.index = 0;
 513
 514     u->module = m;
 515     m->userdata = u;
 516
 517     pa_modargs_free(ma);
 518
 519     return 0;
 520
 521 fail:
 522    if (hwi != INVALID_HANDLE_VALUE)
 523         waveInClose(hwi);
 524
 525    if (hwo != INVALID_HANDLE_VALUE)
 526         waveOutClose(hwo);
 527
 528     if (u)
 529         pa_xfree(u);
 530
 531     if (ma)
 532         pa_modargs_free(ma);
 533
 534     return -1;
 535 }
 536
 537 void pa__done(struct pa_core *c, struct pa_module*m) {
 538     struct userdata *u;
 539     unsigned int i;
 540
 541     assert(c && m);
 542
 543     if (!(u = m->userdata))
 544         return;
 545
 546     if (u->event)
 547         c->mainloop->time_free(u->event);
 548
 549     if (u->defer)
 550         c->mainloop->defer_free(u->defer);
 551
 552     if (u->sink) {
 553         pa_sink_disconnect(u->sink);
 554         pa_sink_unref(u->sink);
 555     }
 556
 557     if (u->source) {
 558         pa_source_disconnect(u->source);
 559         pa_source_unref(u->source);
 560     }
 561
 562     if (u->hwi != INVALID_HANDLE_VALUE) {
 563         waveInReset(u->hwi);
 564         waveInClose(u->hwi);
 565     }
 566
 567     if (u->hwo != INVALID_HANDLE_VALUE) {
 568         waveOutReset(u->hwo);
 569         waveOutClose(u->hwo);
 570     }
 571
 572     for (i = 0;i < u->fragments;i++) {
 573         pa_xfree(u->ihdrs[i].lpData);
 574         pa_xfree(u->ohdrs[i].lpData);
 575     }
 576
 577     pa_xfree(u->ihdrs);
 578     pa_xfree(u->ohdrs);
 579
 580     DeleteCriticalSection(&u->crit);
 581
 582     pa_xfree(u);
 583 }