audio/audio_template.h

   1 /*
   2  * QEMU Audio subsystem header
   3  *
   4  * Copyright (c) 2005 Vassili Karpov (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
  25 #ifdef DAC
  26 #define NAME "playback"
  27 #define HWBUF hw->mix_buf
  28 #define TYPE out
  29 #define HW HWVoiceOut
  30 #define SW SWVoiceOut
  31 #else
  32 #define NAME "capture"
  33 #define TYPE in
  34 #define HW HWVoiceIn
  35 #define SW SWVoiceIn
  36 #define HWBUF hw->conv_buf
  37 #endif
  38
  39 static void glue(audio_init_nb_voices_, TYPE)(AudioState *s,
  40                                               struct audio_driver *drv)
  41 {
  42     int max_voices = glue (drv->max_voices_, TYPE);
  43     int voice_size = glue (drv->voice_size_, TYPE);
  44
  45     if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
  46         if (!max_voices) {
  47 #ifdef DAC
  48             dolog ("Driver `%s' does not support " NAME "\n", drv->name);
  49 #endif
  50         } else {
  51             dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
  52                    drv->name,
  53                    glue (s->nb_hw_voices_, TYPE),
  54                    max_voices);
  55         }
  56         glue (s->nb_hw_voices_, TYPE) = max_voices;
  57     }
  58
  59     if (audio_bug(__func__, !voice_size && max_voices)) {
  60         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
  61                drv->name, max_voices);
  62         glue (s->nb_hw_voices_, TYPE) = 0;
  63     }
  64
  65     if (audio_bug(__func__, voice_size && !max_voices)) {
  66         dolog ("drv=`%s' voice_size=%d max_voices=0\n",
  67                drv->name, voice_size);
  68     }
  69 }
  70
  71 static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
  72 {
  73     g_free(hw->buf_emul);
  74     g_free (HWBUF);
  75     HWBUF = NULL;
  76 }
  77
  78 static void glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
  79 {
  80     if (glue(audio_get_pdo_, TYPE)(hw->s->dev)->mixing_engine) {
  81         size_t samples = hw->samples;
  82         if (audio_bug(__func__, samples == 0)) {
  83             dolog("Attempted to allocate empty buffer\n");
  84         }
  85
  86         HWBUF = g_malloc0(sizeof(STSampleBuffer) + sizeof(st_sample) * samples);
  87         HWBUF->size = samples;
  88     } else {
  89         HWBUF = NULL;
  90     }
  91 }
  92
  93 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
  94 {
  95     g_free (sw->buf);
  96
  97     if (sw->rate) {
  98         st_rate_stop (sw->rate);
  99     }
 100
 101     sw->buf = NULL;
 102     sw->rate = NULL;
 103 }
 104
 105 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
 106 {
 107     int samples;
 108
 109     if (!glue(audio_get_pdo_, TYPE)(sw->s->dev)->mixing_engine) {
 110         return 0;
 111     }
 112
 113     samples = ((int64_t) sw->HWBUF->size << 32) / sw->ratio;
 114
 115     sw->buf = audio_calloc(__func__, samples, sizeof(struct st_sample));
 116     if (!sw->buf) {
 117         dolog ("Could not allocate buffer for `%s' (%d samples)\n",
 118                SW_NAME (sw), samples);
 119         return -1;
 120     }
 121
 122 #ifdef DAC
 123     sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
 124 #else
 125     sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
 126 #endif
 127     if (!sw->rate) {
 128         g_free (sw->buf);
 129         sw->buf = NULL;
 130         return -1;
 131     }
 132     return 0;
 133 }
 134
 135 static int glue (audio_pcm_sw_init_, TYPE) (
 136     SW *sw,
 137     HW *hw,
 138     const char *name,
 139     struct audsettings *as
 140     )
 141 {
 142     int err;
 143
 144     audio_pcm_init_info (&sw->info, as);
 145     sw->hw = hw;
 146     sw->active = 0;
 147 #ifdef DAC
 148     sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
 149     sw->total_hw_samples_mixed = 0;
 150     sw->empty = 1;
 151 #else
 152     sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
 153 #endif
 154
 155     if (sw->info.is_float) {
 156 #ifdef DAC
 157         sw->conv = mixeng_conv_float[sw->info.nchannels == 2];
 158 #else
 159         sw->clip = mixeng_clip_float[sw->info.nchannels == 2];
 160 #endif
 161     } else {
 162 #ifdef DAC
 163         sw->conv = mixeng_conv
 164 #else
 165         sw->clip = mixeng_clip
 166 #endif
 167             [sw->info.nchannels == 2]
 168             [sw->info.is_signed]
 169             [sw->info.swap_endianness]
 170             [audio_bits_to_index(sw->info.bits)];
 171     }
 172
 173     sw->name = g_strdup (name);
 174     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
 175     if (err) {
 176         g_free (sw->name);
 177         sw->name = NULL;
 178     }
 179     return err;
 180 }
 181
 182 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
 183 {
 184     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
 185     g_free (sw->name);
 186     sw->name = NULL;
 187 }
 188
 189 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
 190 {
 191     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
 192 }
 193
 194 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
 195 {
 196     QLIST_REMOVE (sw, entries);
 197 }
 198
 199 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
 200 {
 201     HW *hw = *hwp;
 202     AudioState *s = hw->s;
 203
 204     if (!hw->sw_head.lh_first) {
 205 #ifdef DAC
 206         audio_detach_capture(hw);
 207 #endif
 208         QLIST_REMOVE(hw, entries);
 209         glue(hw->pcm_ops->fini_, TYPE) (hw);
 210         glue(s->nb_hw_voices_, TYPE) += 1;
 211         glue(audio_pcm_hw_free_resources_ , TYPE) (hw);
 212         g_free(hw);
 213         *hwp = NULL;
 214     }
 215 }
 216
 217 static HW *glue(audio_pcm_hw_find_any_, TYPE)(AudioState *s, HW *hw)
 218 {
 219     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
 220 }
 221
 222 static HW *glue(audio_pcm_hw_find_any_enabled_, TYPE)(AudioState *s, HW *hw)
 223 {
 224     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
 225         if (hw->enabled) {
 226             return hw;
 227         }
 228     }
 229     return NULL;
 230 }
 231
 232 static HW *glue(audio_pcm_hw_find_specific_, TYPE)(AudioState *s, HW *hw,
 233                                                    struct audsettings *as)
 234 {
 235     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
 236         if (audio_pcm_info_eq (&hw->info, as)) {
 237             return hw;
 238         }
 239     }
 240     return NULL;
 241 }
 242
 243 static HW *glue(audio_pcm_hw_add_new_, TYPE)(AudioState *s,
 244                                              struct audsettings *as)
 245 {
 246     HW *hw;
 247     struct audio_driver *drv = s->drv;
 248
 249     if (!glue (s->nb_hw_voices_, TYPE)) {
 250         return NULL;
 251     }
 252
 253     if (audio_bug(__func__, !drv)) {
 254         dolog ("No host audio driver\n");
 255         return NULL;
 256     }
 257
 258     if (audio_bug(__func__, !drv->pcm_ops)) {
 259         dolog ("Host audio driver without pcm_ops\n");
 260         return NULL;
 261     }
 262
 263     hw = audio_calloc(__func__, 1, glue(drv->voice_size_, TYPE));
 264     if (!hw) {
 265         dolog ("Can not allocate voice `%s' size %d\n",
 266                drv->name, glue (drv->voice_size_, TYPE));
 267         return NULL;
 268     }
 269
 270     hw->s = s;
 271     hw->pcm_ops = drv->pcm_ops;
 272
 273     QLIST_INIT (&hw->sw_head);
 274 #ifdef DAC
 275     QLIST_INIT (&hw->cap_head);
 276 #endif
 277     if (glue (hw->pcm_ops->init_, TYPE) (hw, as, s->drv_opaque)) {
 278         goto err0;
 279     }
 280
 281     if (audio_bug(__func__, hw->samples <= 0)) {
 282         dolog("hw->samples=%zd\n", hw->samples);
 283         goto err1;
 284     }
 285
 286     if (hw->info.is_float) {
 287 #ifdef DAC
 288         hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
 289 #else
 290         hw->conv = mixeng_conv_float[hw->info.nchannels == 2];
 291 #endif
 292     } else {
 293 #ifdef DAC
 294         hw->clip = mixeng_clip
 295 #else
 296         hw->conv = mixeng_conv
 297 #endif
 298             [hw->info.nchannels == 2]
 299             [hw->info.is_signed]
 300             [hw->info.swap_endianness]
 301             [audio_bits_to_index(hw->info.bits)];
 302     }
 303
 304     glue(audio_pcm_hw_alloc_resources_, TYPE)(hw);
 305
 306     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
 307     glue (s->nb_hw_voices_, TYPE) -= 1;
 308 #ifdef DAC
 309     audio_attach_capture (hw);
 310 #endif
 311     return hw;
 312
 313  err1:
 314     glue (hw->pcm_ops->fini_, TYPE) (hw);
 315  err0:
 316     g_free (hw);
 317     return NULL;
 318 }
 319
 320 AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
 321 {
 322     switch (dev->driver) {
 323     case AUDIODEV_DRIVER_NONE:
 324         return dev->u.none.TYPE;
 325     case AUDIODEV_DRIVER_ALSA:
 326         return qapi_AudiodevAlsaPerDirectionOptions_base(dev->u.alsa.TYPE);
 327     case AUDIODEV_DRIVER_COREAUDIO:
 328         return qapi_AudiodevCoreaudioPerDirectionOptions_base(
 329             dev->u.coreaudio.TYPE);
 330     case AUDIODEV_DRIVER_DBUS:
 331         return dev->u.dbus.TYPE;
 332     case AUDIODEV_DRIVER_DSOUND:
 333         return dev->u.dsound.TYPE;
 334     case AUDIODEV_DRIVER_JACK:
 335         return qapi_AudiodevJackPerDirectionOptions_base(dev->u.jack.TYPE);
 336     case AUDIODEV_DRIVER_OSS:
 337         return qapi_AudiodevOssPerDirectionOptions_base(dev->u.oss.TYPE);
 338     case AUDIODEV_DRIVER_PA:
 339         return qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.TYPE);
 340     case AUDIODEV_DRIVER_SDL:
 341         return qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.TYPE);
 342     case AUDIODEV_DRIVER_SNDIO:
 343         return dev->u.sndio.TYPE;
 344     case AUDIODEV_DRIVER_SPICE:
 345         return dev->u.spice.TYPE;
 346     case AUDIODEV_DRIVER_WAV:
 347         return dev->u.wav.TYPE;
 348
 349     case AUDIODEV_DRIVER__MAX:
 350         break;
 351     }
 352     abort();
 353 }
 354
 355 static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
 356 {
 357     HW *hw;
 358     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 359
 360     if (!pdo->mixing_engine || pdo->fixed_settings) {
 361         hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
 362         if (!pdo->mixing_engine || hw) {
 363             return hw;
 364         }
 365     }
 366
 367     hw = glue(audio_pcm_hw_find_specific_, TYPE)(s, NULL, as);
 368     if (hw) {
 369         return hw;
 370     }
 371
 372     hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
 373     if (hw) {
 374         return hw;
 375     }
 376
 377     return glue(audio_pcm_hw_find_any_, TYPE)(s, NULL);
 378 }
 379
 380 static SW *glue(audio_pcm_create_voice_pair_, TYPE)(
 381     AudioState *s,
 382     const char *sw_name,
 383     struct audsettings *as
 384     )
 385 {
 386     SW *sw;
 387     HW *hw;
 388     struct audsettings hw_as;
 389     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 390
 391     if (pdo->fixed_settings) {
 392         hw_as = audiodev_to_audsettings(pdo);
 393     } else {
 394         hw_as = *as;
 395     }
 396
 397     sw = audio_calloc(__func__, 1, sizeof(*sw));
 398     if (!sw) {
 399         dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
 400                sw_name ? sw_name : "unknown", sizeof (*sw));
 401         goto err1;
 402     }
 403     sw->s = s;
 404
 405     hw = glue(audio_pcm_hw_add_, TYPE)(s, &hw_as);
 406     if (!hw) {
 407         goto err2;
 408     }
 409
 410     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
 411
 412     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
 413         goto err3;
 414     }
 415
 416     return sw;
 417
 418 err3:
 419     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 420     glue (audio_pcm_hw_gc_, TYPE) (&hw);
 421 err2:
 422     g_free (sw);
 423 err1:
 424     return NULL;
 425 }
 426
 427 static void glue (audio_close_, TYPE) (SW *sw)
 428 {
 429     glue (audio_pcm_sw_fini_, TYPE) (sw);
 430     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 431     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
 432     g_free (sw);
 433 }
 434
 435 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
 436 {
 437     if (sw) {
 438         if (audio_bug(__func__, !card)) {
 439             dolog ("card=%p\n", card);
 440             return;
 441         }
 442
 443         glue (audio_close_, TYPE) (sw);
 444     }
 445 }
 446
 447 SW *glue (AUD_open_, TYPE) (
 448     QEMUSoundCard *card,
 449     SW *sw,
 450     const char *name,
 451     void *callback_opaque ,
 452     audio_callback_fn callback_fn,
 453     struct audsettings *as
 454     )
 455 {
 456     AudioState *s;
 457     AudiodevPerDirectionOptions *pdo;
 458
 459     if (audio_bug(__func__, !card || !name || !callback_fn || !as)) {
 460         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
 461                card, name, callback_fn, as);
 462         goto fail;
 463     }
 464
 465     s = card->state;
 466     pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 467
 468     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
 469             name, as->freq, as->nchannels, as->fmt);
 470
 471     if (audio_bug(__func__, audio_validate_settings(as))) {
 472         audio_print_settings (as);
 473         goto fail;
 474     }
 475
 476     if (audio_bug(__func__, !s->drv)) {
 477         dolog ("Can not open `%s' (no host audio driver)\n", name);
 478         goto fail;
 479     }
 480
 481     if (sw && audio_pcm_info_eq (&sw->info, as)) {
 482         return sw;
 483     }
 484
 485     if (!pdo->fixed_settings && sw) {
 486         glue (AUD_close_, TYPE) (card, sw);
 487         sw = NULL;
 488     }
 489
 490     if (sw) {
 491         HW *hw = sw->hw;
 492
 493         if (!hw) {
 494             dolog ("Internal logic error voice `%s' has no hardware store\n",
 495                    SW_NAME (sw));
 496             goto fail;
 497         }
 498
 499         glue (audio_pcm_sw_fini_, TYPE) (sw);
 500         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
 501             goto fail;
 502         }
 503     } else {
 504         sw = glue(audio_pcm_create_voice_pair_, TYPE)(s, name, as);
 505         if (!sw) {
 506             dolog ("Failed to create voice `%s'\n", name);
 507             return NULL;
 508         }
 509     }
 510
 511     sw->card = card;
 512     sw->vol = nominal_volume;
 513     sw->callback.fn = callback_fn;
 514     sw->callback.opaque = callback_opaque;
 515
 516 #ifdef DEBUG_AUDIO
 517     dolog ("%s\n", name);
 518     audio_pcm_print_info ("hw", &sw->hw->info);
 519     audio_pcm_print_info ("sw", &sw->info);
 520 #endif
 521
 522     return sw;
 523
 524  fail:
 525     glue (AUD_close_, TYPE) (card, sw);
 526     return NULL;
 527 }
 528
 529 int glue (AUD_is_active_, TYPE) (SW *sw)
 530 {
 531     return sw ? sw->active : 0;
 532 }
 533
 534 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 535 {
 536     if (!sw) {
 537         return;
 538     }
 539
 540     ts->old_ts = sw->hw->ts_helper;
 541 }
 542
 543 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 544 {
 545     uint64_t delta, cur_ts, old_ts;
 546
 547     if (!sw) {
 548         return 0;
 549     }
 550
 551     cur_ts = sw->hw->ts_helper;
 552     old_ts = ts->old_ts;
 553     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
 554
 555     if (cur_ts >= old_ts) {
 556         delta = cur_ts - old_ts;
 557     } else {
 558         delta = UINT64_MAX - old_ts + cur_ts;
 559     }
 560
 561     if (!delta) {
 562         return 0;
 563     }
 564
 565     return muldiv64 (delta, sw->hw->info.freq, 1000000);
 566 }
 567
 568 #undef TYPE
 569 #undef HW
 570 #undef SW
 571 #undef HWBUF
 572 #undef NAME