audio/esdaudio.c

   1 /*
   2  * QEMU ESD audio driver
   3  *
   4  * Copyright (c) 2006 Frederick Reeve (brushed up by malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <esd.h>
  25 #include "qemu-common.h"
  26 #include "audio.h"
  27
  28 #define AUDIO_CAP "esd"
  29 #include "audio_int.h"
  30 #include "audio_pt_int.h"
  31
  32 typedef struct {
  33     HWVoiceOut hw;
  34     int done;
  35     int live;
  36     int decr;
  37     int rpos;
  38     void *pcm_buf;
  39     int fd;
  40     struct audio_pt pt;
  41 } ESDVoiceOut;
  42
  43 typedef struct {
  44     HWVoiceIn hw;
  45     int done;
  46     int dead;
  47     int incr;
  48     int wpos;
  49     void *pcm_buf;
  50     int fd;
  51     struct audio_pt pt;
  52 } ESDVoiceIn;
  53
  54 static struct {
  55     int samples;
  56     int divisor;
  57     char *dac_host;
  58     char *adc_host;
  59 } conf = {
  60     .samples = 1024,
  61     .divisor = 2,
  62 };
  63
  64 static void GCC_FMT_ATTR (2, 3) qesd_logerr (int err, const char *fmt, ...)
  65 {
  66     va_list ap;
  67
  68     va_start (ap, fmt);
  69     AUD_vlog (AUDIO_CAP, fmt, ap);
  70     va_end (ap);
  71
  72     AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
  73 }
  74
  75 /* playback */
  76 static void *qesd_thread_out (void *arg)
  77 {
  78     ESDVoiceOut *esd = arg;
  79     HWVoiceOut *hw = &esd->hw;
  80     int threshold;
  81
  82     threshold = conf.divisor ? hw->samples / conf.divisor : 0;
  83
  84     if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
  85         return NULL;
  86     }
  87
  88     for (;;) {
  89         int decr, to_mix, rpos;
  90
  91         for (;;) {
  92             if (esd->done) {
  93                 goto exit;
  94             }
  95
  96             if (esd->live > threshold) {
  97                 break;
  98             }
  99
 100             if (audio_pt_wait (&esd->pt, AUDIO_FUNC)) {
 101                 goto exit;
 102             }
 103         }
 104
 105         decr = to_mix = esd->live;
 106         rpos = hw->rpos;
 107
 108         if (audio_pt_unlock (&esd->pt, AUDIO_FUNC)) {
 109             return NULL;
 110         }
 111
 112         while (to_mix) {
 113             ssize_t written;
 114             int chunk = audio_MIN (to_mix, hw->samples - rpos);
 115             struct st_sample *src = hw->mix_buf + rpos;
 116
 117             hw->clip (esd->pcm_buf, src, chunk);
 118
 119         again:
 120             written = write (esd->fd, esd->pcm_buf, chunk << hw->info.shift);
 121             if (written == -1) {
 122                 if (errno == EINTR || errno == EAGAIN) {
 123                     goto again;
 124                 }
 125                 qesd_logerr (errno, "write failed\n");
 126                 return NULL;
 127             }
 128
 129             if (written != chunk << hw->info.shift) {
 130                 int wsamples = written >> hw->info.shift;
 131                 int wbytes = wsamples << hw->info.shift;
 132                 if (wbytes != written) {
 133                     dolog ("warning: Misaligned write %d (requested %zd), "
 134                            "alignment %d\n",
 135                            wbytes, written, hw->info.align + 1);
 136                 }
 137                 to_mix -= wsamples;
 138                 rpos = (rpos + wsamples) % hw->samples;
 139                 break;
 140             }
 141
 142             rpos = (rpos + chunk) % hw->samples;
 143             to_mix -= chunk;
 144         }
 145
 146         if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
 147             return NULL;
 148         }
 149
 150         esd->rpos = rpos;
 151         esd->live -= decr;
 152         esd->decr += decr;
 153     }
 154
 155  exit:
 156     audio_pt_unlock (&esd->pt, AUDIO_FUNC);
 157     return NULL;
 158 }
 159
 160 static int qesd_run_out (HWVoiceOut *hw, int live)
 161 {
 162     int decr;
 163     ESDVoiceOut *esd = (ESDVoiceOut *) hw;
 164
 165     if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
 166         return 0;
 167     }
 168
 169     decr = audio_MIN (live, esd->decr);
 170     esd->decr -= decr;
 171     esd->live = live - decr;
 172     hw->rpos = esd->rpos;
 173     if (esd->live > 0) {
 174         audio_pt_unlock_and_signal (&esd->pt, AUDIO_FUNC);
 175     }
 176     else {
 177         audio_pt_unlock (&esd->pt, AUDIO_FUNC);
 178     }
 179     return decr;
 180 }
 181
 182 static int qesd_write (SWVoiceOut *sw, void *buf, int len)
 183 {
 184     return audio_pcm_sw_write (sw, buf, len);
 185 }
 186
 187 static int qesd_init_out (HWVoiceOut *hw, struct audsettings *as)
 188 {
 189     ESDVoiceOut *esd = (ESDVoiceOut *) hw;
 190     struct audsettings obt_as = *as;
 191     int esdfmt = ESD_STREAM | ESD_PLAY;
 192
 193     esdfmt |= (as->nchannels == 2) ? ESD_STEREO : ESD_MONO;
 194     switch (as->fmt) {
 195     case AUD_FMT_S8:
 196     case AUD_FMT_U8:
 197         esdfmt |= ESD_BITS8;
 198         obt_as.fmt = AUD_FMT_U8;
 199         break;
 200
 201     case AUD_FMT_S32:
 202     case AUD_FMT_U32:
 203         dolog ("Will use 16 instead of 32 bit samples\n");
 204
 205     case AUD_FMT_S16:
 206     case AUD_FMT_U16:
 207     deffmt:
 208         esdfmt |= ESD_BITS16;
 209         obt_as.fmt = AUD_FMT_S16;
 210         break;
 211
 212     default:
 213         dolog ("Internal logic error: Bad audio format %d\n", as->fmt);
 214         goto deffmt;
 215
 216     }
 217     obt_as.endianness = AUDIO_HOST_ENDIANNESS;
 218
 219     audio_pcm_init_info (&hw->info, &obt_as);
 220
 221     hw->samples = conf.samples;
 222     esd->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
 223     if (!esd->pcm_buf) {
 224         dolog ("Could not allocate buffer (%d bytes)\n",
 225                hw->samples << hw->info.shift);
 226         return -1;
 227     }
 228
 229     esd->fd = esd_play_stream (esdfmt, as->freq, conf.dac_host, NULL);
 230     if (esd->fd < 0) {
 231         qesd_logerr (errno, "esd_play_stream failed\n");
 232         goto fail1;
 233     }
 234
 235     if (audio_pt_init (&esd->pt, qesd_thread_out, esd, AUDIO_CAP, AUDIO_FUNC)) {
 236         goto fail2;
 237     }
 238
 239     return 0;
 240
 241  fail2:
 242     if (close (esd->fd)) {
 243         qesd_logerr (errno, "%s: close on esd socket(%d) failed\n",
 244                      AUDIO_FUNC, esd->fd);
 245     }
 246     esd->fd = -1;
 247
 248  fail1:
 249     qemu_free (esd->pcm_buf);
 250     esd->pcm_buf = NULL;
 251     return -1;
 252 }
 253
 254 static void qesd_fini_out (HWVoiceOut *hw)
 255 {
 256     void *ret;
 257     ESDVoiceOut *esd = (ESDVoiceOut *) hw;
 258
 259     audio_pt_lock (&esd->pt, AUDIO_FUNC);
 260     esd->done = 1;
 261     audio_pt_unlock_and_signal (&esd->pt, AUDIO_FUNC);
 262     audio_pt_join (&esd->pt, &ret, AUDIO_FUNC);
 263
 264     if (esd->fd >= 0) {
 265         if (close (esd->fd)) {
 266             qesd_logerr (errno, "failed to close esd socket\n");
 267         }
 268         esd->fd = -1;
 269     }
 270
 271     audio_pt_fini (&esd->pt, AUDIO_FUNC);
 272
 273     qemu_free (esd->pcm_buf);
 274     esd->pcm_buf = NULL;
 275 }
 276
 277 static int qesd_ctl_out (HWVoiceOut *hw, int cmd, ...)
 278 {
 279     (void) hw;
 280     (void) cmd;
 281     return 0;
 282 }
 283
 284 /* capture */
 285 static void *qesd_thread_in (void *arg)
 286 {
 287     ESDVoiceIn *esd = arg;
 288     HWVoiceIn *hw = &esd->hw;
 289     int threshold;
 290
 291     threshold = conf.divisor ? hw->samples / conf.divisor : 0;
 292
 293     if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
 294         return NULL;
 295     }
 296
 297     for (;;) {
 298         int incr, to_grab, wpos;
 299
 300         for (;;) {
 301             if (esd->done) {
 302                 goto exit;
 303             }
 304
 305             if (esd->dead > threshold) {
 306                 break;
 307             }
 308
 309             if (audio_pt_wait (&esd->pt, AUDIO_FUNC)) {
 310                 goto exit;
 311             }
 312         }
 313
 314         incr = to_grab = esd->dead;
 315         wpos = hw->wpos;
 316
 317         if (audio_pt_unlock (&esd->pt, AUDIO_FUNC)) {
 318             return NULL;
 319         }
 320
 321         while (to_grab) {
 322             ssize_t nread;
 323             int chunk = audio_MIN (to_grab, hw->samples - wpos);
 324             void *buf = advance (esd->pcm_buf, wpos);
 325
 326         again:
 327             nread = read (esd->fd, buf, chunk << hw->info.shift);
 328             if (nread == -1) {
 329                 if (errno == EINTR || errno == EAGAIN) {
 330                     goto again;
 331                 }
 332                 qesd_logerr (errno, "read failed\n");
 333                 return NULL;
 334             }
 335
 336             if (nread != chunk << hw->info.shift) {
 337                 int rsamples = nread >> hw->info.shift;
 338                 int rbytes = rsamples << hw->info.shift;
 339                 if (rbytes != nread) {
 340                     dolog ("warning: Misaligned write %d (requested %zd), "
 341                            "alignment %d\n",
 342                            rbytes, nread, hw->info.align + 1);
 343                 }
 344                 to_grab -= rsamples;
 345                 wpos = (wpos + rsamples) % hw->samples;
 346                 break;
 347             }
 348
 349             hw->conv (hw->conv_buf + wpos, buf, nread >> hw->info.shift);
 350             wpos = (wpos + chunk) % hw->samples;
 351             to_grab -= chunk;
 352         }
 353
 354         if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
 355             return NULL;
 356         }
 357
 358         esd->wpos = wpos;
 359         esd->dead -= incr;
 360         esd->incr += incr;
 361     }
 362
 363  exit:
 364     audio_pt_unlock (&esd->pt, AUDIO_FUNC);
 365     return NULL;
 366 }
 367
 368 static int qesd_run_in (HWVoiceIn *hw)
 369 {
 370     int live, incr, dead;
 371     ESDVoiceIn *esd = (ESDVoiceIn *) hw;
 372
 373     if (audio_pt_lock (&esd->pt, AUDIO_FUNC)) {
 374         return 0;
 375     }
 376
 377     live = audio_pcm_hw_get_live_in (hw);
 378     dead = hw->samples - live;
 379     incr = audio_MIN (dead, esd->incr);
 380     esd->incr -= incr;
 381     esd->dead = dead - incr;
 382     hw->wpos = esd->wpos;
 383     if (esd->dead > 0) {
 384         audio_pt_unlock_and_signal (&esd->pt, AUDIO_FUNC);
 385     }
 386     else {
 387         audio_pt_unlock (&esd->pt, AUDIO_FUNC);
 388     }
 389     return incr;
 390 }
 391
 392 static int qesd_read (SWVoiceIn *sw, void *buf, int len)
 393 {
 394     return audio_pcm_sw_read (sw, buf, len);
 395 }
 396
 397 static int qesd_init_in (HWVoiceIn *hw, struct audsettings *as)
 398 {
 399     ESDVoiceIn *esd = (ESDVoiceIn *) hw;
 400     struct audsettings obt_as = *as;
 401     int esdfmt = ESD_STREAM | ESD_RECORD;
 402
 403     esdfmt |= (as->nchannels == 2) ? ESD_STEREO : ESD_MONO;
 404     switch (as->fmt) {
 405     case AUD_FMT_S8:
 406     case AUD_FMT_U8:
 407         esdfmt |= ESD_BITS8;
 408         obt_as.fmt = AUD_FMT_U8;
 409         break;
 410
 411     case AUD_FMT_S16:
 412     case AUD_FMT_U16:
 413         esdfmt |= ESD_BITS16;
 414         obt_as.fmt = AUD_FMT_S16;
 415         break;
 416
 417     case AUD_FMT_S32:
 418     case AUD_FMT_U32:
 419         dolog ("Will use 16 instead of 32 bit samples\n");
 420         esdfmt |= ESD_BITS16;
 421         obt_as.fmt = AUD_FMT_S16;
 422         break;
 423     }
 424     obt_as.endianness = AUDIO_HOST_ENDIANNESS;
 425
 426     audio_pcm_init_info (&hw->info, &obt_as);
 427
 428     hw->samples = conf.samples;
 429     esd->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
 430     if (!esd->pcm_buf) {
 431         dolog ("Could not allocate buffer (%d bytes)\n",
 432                hw->samples << hw->info.shift);
 433         return -1;
 434     }
 435
 436     esd->fd = esd_record_stream (esdfmt, as->freq, conf.adc_host, NULL);
 437     if (esd->fd < 0) {
 438         qesd_logerr (errno, "esd_record_stream failed\n");
 439         goto fail1;
 440     }
 441
 442     if (audio_pt_init (&esd->pt, qesd_thread_in, esd, AUDIO_CAP, AUDIO_FUNC)) {
 443         goto fail2;
 444     }
 445
 446     return 0;
 447
 448  fail2:
 449     if (close (esd->fd)) {
 450         qesd_logerr (errno, "%s: close on esd socket(%d) failed\n",
 451                      AUDIO_FUNC, esd->fd);
 452     }
 453     esd->fd = -1;
 454
 455  fail1:
 456     qemu_free (esd->pcm_buf);
 457     esd->pcm_buf = NULL;
 458     return -1;
 459 }
 460
 461 static void qesd_fini_in (HWVoiceIn *hw)
 462 {
 463     void *ret;
 464     ESDVoiceIn *esd = (ESDVoiceIn *) hw;
 465
 466     audio_pt_lock (&esd->pt, AUDIO_FUNC);
 467     esd->done = 1;
 468     audio_pt_unlock_and_signal (&esd->pt, AUDIO_FUNC);
 469     audio_pt_join (&esd->pt, &ret, AUDIO_FUNC);
 470
 471     if (esd->fd >= 0) {
 472         if (close (esd->fd)) {
 473             qesd_logerr (errno, "failed to close esd socket\n");
 474         }
 475         esd->fd = -1;
 476     }
 477
 478     audio_pt_fini (&esd->pt, AUDIO_FUNC);
 479
 480     qemu_free (esd->pcm_buf);
 481     esd->pcm_buf = NULL;
 482 }
 483
 484 static int qesd_ctl_in (HWVoiceIn *hw, int cmd, ...)
 485 {
 486     (void) hw;
 487     (void) cmd;
 488     return 0;
 489 }
 490
 491 /* common */
 492 static void *qesd_audio_init (void)
 493 {
 494     return &conf;
 495 }
 496
 497 static void qesd_audio_fini (void *opaque)
 498 {
 499     (void) opaque;
 500     ldebug ("esd_fini");
 501 }
 502
 503 struct audio_option qesd_options[] = {
 504     {
 505         .name  = "SAMPLES",
 506         .tag   = AUD_OPT_INT,
 507         .valp  = &conf.samples,
 508         .descr = "buffer size in samples"
 509     },
 510     {
 511         .name  = "DIVISOR",
 512         .tag   = AUD_OPT_INT,
 513         .valp  = &conf.divisor,
 514         .descr = "threshold divisor"
 515     },
 516     {
 517         .name  = "DAC_HOST",
 518         .tag   = AUD_OPT_STR,
 519         .valp  = &conf.dac_host,
 520         .descr = "playback host"
 521     },
 522     {
 523         .name  = "ADC_HOST",
 524         .tag   = AUD_OPT_STR,
 525         .valp  = &conf.adc_host,
 526         .descr = "capture host"
 527     },
 528     { /* End of list */ }
 529 };
 530
 531 static struct audio_pcm_ops qesd_pcm_ops = {
 532     .init_out = qesd_init_out,
 533     .fini_out = qesd_fini_out,
 534     .run_out  = qesd_run_out,
 535     .write    = qesd_write,
 536     .ctl_out  = qesd_ctl_out,
 537
 538     .init_in  = qesd_init_in,
 539     .fini_in  = qesd_fini_in,
 540     .run_in   = qesd_run_in,
 541     .read     = qesd_read,
 542     .ctl_in   = qesd_ctl_in,
 543 };
 544
 545 struct audio_driver esd_audio_driver = {
 546     .name           = "esd",
 547     .descr          = "http://en.wikipedia.org/wiki/Esound",
 548     .options        = qesd_options,
 549     .init           = qesd_audio_init,
 550     .fini           = qesd_audio_fini,
 551     .pcm_ops        = &qesd_pcm_ops,
 552     .can_be_default = 0,
 553     .max_voices_out = INT_MAX,
 554     .max_voices_in  = INT_MAX,
 555     .voice_size_out = sizeof (ESDVoiceOut),
 556     .voice_size_in  = sizeof (ESDVoiceIn)
 557 };