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     size_t 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=%zu 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.buffer);
  75     HWBUF.buffer = NULL;
  76     HWBUF.size = 0;
  77 }
  78
  79 static void glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
  80 {
  81     if (glue(audio_get_pdo_, TYPE)(hw->s->dev)->mixing_engine) {
  82         size_t samples = hw->samples;
  83         if (audio_bug(__func__, samples == 0)) {
  84             dolog("Attempted to allocate empty buffer\n");
  85         }
  86
  87         HWBUF.buffer = g_new0(st_sample, samples);
  88         HWBUF.size = samples;
  89         HWBUF.pos = 0;
  90     } else {
  91         HWBUF.buffer = NULL;
  92         HWBUF.size = 0;
  93     }
  94 }
  95
  96 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
  97 {
  98     g_free(sw->resample_buf.buffer);
  99     sw->resample_buf.buffer = NULL;
 100     sw->resample_buf.size = 0;
 101
 102     if (sw->rate) {
 103         st_rate_stop (sw->rate);
 104     }
 105     sw->rate = NULL;
 106 }
 107
 108 static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
 109 {
 110     HW *hw = sw->hw;
 111     uint64_t samples;
 112
 113     if (!glue(audio_get_pdo_, TYPE)(sw->s->dev)->mixing_engine) {
 114         return 0;
 115     }
 116
 117     samples = muldiv64(HWBUF.size, sw->info.freq, hw->info.freq);
 118     if (samples == 0) {
 119         uint64_t f_fe_min;
 120         uint64_t f_be = (uint32_t)hw->info.freq;
 121
 122         /* f_fe_min = ceil(1 [frames] * f_be [Hz] / size_be [frames]) */
 123         f_fe_min = (f_be + HWBUF.size - 1) / HWBUF.size;
 124         qemu_log_mask(LOG_UNIMP,
 125                       AUDIO_CAP ": The guest selected a " NAME " sample rate"
 126                       " of %d Hz for %s. Only sample rates >= %" PRIu64 " Hz"
 127                       " are supported.\n",
 128                       sw->info.freq, sw->name, f_fe_min);
 129         return -1;
 130     }
 131
 132     /*
 133      * Allocate one additional audio frame that is needed for upsampling
 134      * if the resample buffer size is small. For large buffer sizes take
 135      * care of overflows and truncation.
 136      */
 137     samples = samples < SIZE_MAX ? samples + 1 : SIZE_MAX;
 138     sw->resample_buf.buffer = g_new0(st_sample, samples);
 139     sw->resample_buf.size = samples;
 140     sw->resample_buf.pos = 0;
 141
 142 #ifdef DAC
 143     sw->rate = st_rate_start(sw->info.freq, hw->info.freq);
 144 #else
 145     sw->rate = st_rate_start(hw->info.freq, sw->info.freq);
 146 #endif
 147
 148     return 0;
 149 }
 150
 151 static int glue (audio_pcm_sw_init_, TYPE) (
 152     SW *sw,
 153     HW *hw,
 154     const char *name,
 155     struct audsettings *as
 156     )
 157 {
 158     int err;
 159
 160     audio_pcm_init_info (&sw->info, as);
 161     sw->hw = hw;
 162     sw->active = 0;
 163 #ifdef DAC
 164     sw->total_hw_samples_mixed = 0;
 165     sw->empty = 1;
 166 #endif
 167
 168     if (sw->info.is_float) {
 169 #ifdef DAC
 170         sw->conv = mixeng_conv_float[sw->info.nchannels == 2];
 171 #else
 172         sw->clip = mixeng_clip_float[sw->info.nchannels == 2];
 173 #endif
 174     } else {
 175 #ifdef DAC
 176         sw->conv = mixeng_conv
 177 #else
 178         sw->clip = mixeng_clip
 179 #endif
 180             [sw->info.nchannels == 2]
 181             [sw->info.is_signed]
 182             [sw->info.swap_endianness]
 183             [audio_bits_to_index(sw->info.bits)];
 184     }
 185
 186     sw->name = g_strdup (name);
 187     err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
 188     if (err) {
 189         g_free (sw->name);
 190         sw->name = NULL;
 191     }
 192     return err;
 193 }
 194
 195 static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
 196 {
 197     glue (audio_pcm_sw_free_resources_, TYPE) (sw);
 198     g_free (sw->name);
 199     sw->name = NULL;
 200 }
 201
 202 static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
 203 {
 204     QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
 205 }
 206
 207 static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
 208 {
 209     QLIST_REMOVE (sw, entries);
 210 }
 211
 212 static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
 213 {
 214     HW *hw = *hwp;
 215     AudioState *s = hw->s;
 216
 217     if (!hw->sw_head.lh_first) {
 218 #ifdef DAC
 219         audio_detach_capture(hw);
 220 #endif
 221         QLIST_REMOVE(hw, entries);
 222         glue(hw->pcm_ops->fini_, TYPE) (hw);
 223         glue(s->nb_hw_voices_, TYPE) += 1;
 224         glue(audio_pcm_hw_free_resources_ , TYPE) (hw);
 225         g_free(hw);
 226         *hwp = NULL;
 227     }
 228 }
 229
 230 static HW *glue(audio_pcm_hw_find_any_, TYPE)(AudioState *s, HW *hw)
 231 {
 232     return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
 233 }
 234
 235 static HW *glue(audio_pcm_hw_find_any_enabled_, TYPE)(AudioState *s, HW *hw)
 236 {
 237     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
 238         if (hw->enabled) {
 239             return hw;
 240         }
 241     }
 242     return NULL;
 243 }
 244
 245 static HW *glue(audio_pcm_hw_find_specific_, TYPE)(AudioState *s, HW *hw,
 246                                                    struct audsettings *as)
 247 {
 248     while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, hw))) {
 249         if (audio_pcm_info_eq (&hw->info, as)) {
 250             return hw;
 251         }
 252     }
 253     return NULL;
 254 }
 255
 256 static HW *glue(audio_pcm_hw_add_new_, TYPE)(AudioState *s,
 257                                              struct audsettings *as)
 258 {
 259     HW *hw;
 260     struct audio_driver *drv = s->drv;
 261
 262     if (!glue (s->nb_hw_voices_, TYPE)) {
 263         return NULL;
 264     }
 265
 266     if (audio_bug(__func__, !drv)) {
 267         dolog ("No host audio driver\n");
 268         return NULL;
 269     }
 270
 271     if (audio_bug(__func__, !drv->pcm_ops)) {
 272         dolog ("Host audio driver without pcm_ops\n");
 273         return NULL;
 274     }
 275
 276     /*
 277      * Since glue(s->nb_hw_voices_, TYPE) is != 0, glue(drv->voice_size_, TYPE)
 278      * is guaranteed to be != 0. See the audio_init_nb_voices_* functions.
 279      */
 280     hw = g_malloc0(glue(drv->voice_size_, TYPE));
 281     hw->s = s;
 282     hw->pcm_ops = drv->pcm_ops;
 283
 284     QLIST_INIT (&hw->sw_head);
 285 #ifdef DAC
 286     QLIST_INIT (&hw->cap_head);
 287 #endif
 288     if (glue (hw->pcm_ops->init_, TYPE) (hw, as, s->drv_opaque)) {
 289         goto err0;
 290     }
 291
 292     if (audio_bug(__func__, hw->samples <= 0)) {
 293         dolog("hw->samples=%zd\n", hw->samples);
 294         goto err1;
 295     }
 296
 297     if (hw->info.is_float) {
 298 #ifdef DAC
 299         hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
 300 #else
 301         hw->conv = mixeng_conv_float[hw->info.nchannels == 2];
 302 #endif
 303     } else {
 304 #ifdef DAC
 305         hw->clip = mixeng_clip
 306 #else
 307         hw->conv = mixeng_conv
 308 #endif
 309             [hw->info.nchannels == 2]
 310             [hw->info.is_signed]
 311             [hw->info.swap_endianness]
 312             [audio_bits_to_index(hw->info.bits)];
 313     }
 314
 315     glue(audio_pcm_hw_alloc_resources_, TYPE)(hw);
 316
 317     QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
 318     glue (s->nb_hw_voices_, TYPE) -= 1;
 319 #ifdef DAC
 320     audio_attach_capture (hw);
 321 #endif
 322     return hw;
 323
 324  err1:
 325     glue (hw->pcm_ops->fini_, TYPE) (hw);
 326  err0:
 327     g_free (hw);
 328     return NULL;
 329 }
 330
 331 AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
 332 {
 333     switch (dev->driver) {
 334     case AUDIODEV_DRIVER_NONE:
 335         return dev->u.none.TYPE;
 336 #ifdef CONFIG_AUDIO_ALSA
 337     case AUDIODEV_DRIVER_ALSA:
 338         return qapi_AudiodevAlsaPerDirectionOptions_base(dev->u.alsa.TYPE);
 339 #endif
 340 #ifdef CONFIG_AUDIO_COREAUDIO
 341     case AUDIODEV_DRIVER_COREAUDIO:
 342         return qapi_AudiodevCoreaudioPerDirectionOptions_base(
 343             dev->u.coreaudio.TYPE);
 344 #endif
 345 #ifdef CONFIG_DBUS_DISPLAY
 346     case AUDIODEV_DRIVER_DBUS:
 347         return dev->u.dbus.TYPE;
 348 #endif
 349 #ifdef CONFIG_AUDIO_DSOUND
 350     case AUDIODEV_DRIVER_DSOUND:
 351         return dev->u.dsound.TYPE;
 352 #endif
 353 #ifdef CONFIG_AUDIO_JACK
 354     case AUDIODEV_DRIVER_JACK:
 355         return qapi_AudiodevJackPerDirectionOptions_base(dev->u.jack.TYPE);
 356 #endif
 357 #ifdef CONFIG_AUDIO_OSS
 358     case AUDIODEV_DRIVER_OSS:
 359         return qapi_AudiodevOssPerDirectionOptions_base(dev->u.oss.TYPE);
 360 #endif
 361 #ifdef CONFIG_AUDIO_PA
 362     case AUDIODEV_DRIVER_PA:
 363         return qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.TYPE);
 364 #endif
 365 #ifdef CONFIG_AUDIO_SDL
 366     case AUDIODEV_DRIVER_SDL:
 367         return qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.TYPE);
 368 #endif
 369 #ifdef CONFIG_AUDIO_SNDIO
 370     case AUDIODEV_DRIVER_SNDIO:
 371         return dev->u.sndio.TYPE;
 372 #endif
 373 #ifdef CONFIG_SPICE
 374     case AUDIODEV_DRIVER_SPICE:
 375         return dev->u.spice.TYPE;
 376 #endif
 377     case AUDIODEV_DRIVER_WAV:
 378         return dev->u.wav.TYPE;
 379
 380     case AUDIODEV_DRIVER__MAX:
 381         break;
 382     }
 383     abort();
 384 }
 385
 386 static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
 387 {
 388     HW *hw;
 389     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 390
 391     if (!pdo->mixing_engine || pdo->fixed_settings) {
 392         hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
 393         if (!pdo->mixing_engine || hw) {
 394             return hw;
 395         }
 396     }
 397
 398     hw = glue(audio_pcm_hw_find_specific_, TYPE)(s, NULL, as);
 399     if (hw) {
 400         return hw;
 401     }
 402
 403     hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
 404     if (hw) {
 405         return hw;
 406     }
 407
 408     return glue(audio_pcm_hw_find_any_, TYPE)(s, NULL);
 409 }
 410
 411 static SW *glue(audio_pcm_create_voice_pair_, TYPE)(
 412     AudioState *s,
 413     const char *sw_name,
 414     struct audsettings *as
 415     )
 416 {
 417     SW *sw;
 418     HW *hw;
 419     struct audsettings hw_as;
 420     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 421
 422     if (pdo->fixed_settings) {
 423         hw_as = audiodev_to_audsettings(pdo);
 424     } else {
 425         hw_as = *as;
 426     }
 427
 428     sw = g_new0(SW, 1);
 429     sw->s = s;
 430
 431     hw = glue(audio_pcm_hw_add_, TYPE)(s, &hw_as);
 432     if (!hw) {
 433         dolog("Could not create a backend for voice `%s'\n", sw_name);
 434         goto err1;
 435     }
 436
 437     glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
 438
 439     if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
 440         goto err2;
 441     }
 442
 443     return sw;
 444
 445 err2:
 446     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 447     glue (audio_pcm_hw_gc_, TYPE) (&hw);
 448 err1:
 449     g_free(sw);
 450     return NULL;
 451 }
 452
 453 static void glue (audio_close_, TYPE) (SW *sw)
 454 {
 455     glue (audio_pcm_sw_fini_, TYPE) (sw);
 456     glue (audio_pcm_hw_del_sw_, TYPE) (sw);
 457     glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
 458     g_free (sw);
 459 }
 460
 461 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
 462 {
 463     if (sw) {
 464         if (audio_bug(__func__, !card)) {
 465             dolog ("card=%p\n", card);
 466             return;
 467         }
 468
 469         glue (audio_close_, TYPE) (sw);
 470     }
 471 }
 472
 473 SW *glue (AUD_open_, TYPE) (
 474     QEMUSoundCard *card,
 475     SW *sw,
 476     const char *name,
 477     void *callback_opaque ,
 478     audio_callback_fn callback_fn,
 479     struct audsettings *as
 480     )
 481 {
 482     AudioState *s;
 483     AudiodevPerDirectionOptions *pdo;
 484
 485     if (audio_bug(__func__, !card || !name || !callback_fn || !as)) {
 486         dolog ("card=%p name=%p callback_fn=%p as=%p\n",
 487                card, name, callback_fn, as);
 488         goto fail;
 489     }
 490
 491     s = card->state;
 492     pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 493
 494     ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
 495             name, as->freq, as->nchannels, as->fmt);
 496
 497     if (audio_bug(__func__, audio_validate_settings(as))) {
 498         audio_print_settings (as);
 499         goto fail;
 500     }
 501
 502     if (audio_bug(__func__, !s->drv)) {
 503         dolog ("Can not open `%s' (no host audio driver)\n", name);
 504         goto fail;
 505     }
 506
 507     if (sw && audio_pcm_info_eq (&sw->info, as)) {
 508         return sw;
 509     }
 510
 511     if (!pdo->fixed_settings && sw) {
 512         glue (AUD_close_, TYPE) (card, sw);
 513         sw = NULL;
 514     }
 515
 516     if (sw) {
 517         HW *hw = sw->hw;
 518
 519         if (!hw) {
 520             dolog("Internal logic error: voice `%s' has no backend\n",
 521                   SW_NAME(sw));
 522             goto fail;
 523         }
 524
 525         glue (audio_pcm_sw_fini_, TYPE) (sw);
 526         if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
 527             goto fail;
 528         }
 529     } else {
 530         sw = glue(audio_pcm_create_voice_pair_, TYPE)(s, name, as);
 531         if (!sw) {
 532             return NULL;
 533         }
 534     }
 535
 536     sw->card = card;
 537     sw->vol = nominal_volume;
 538     sw->callback.fn = callback_fn;
 539     sw->callback.opaque = callback_opaque;
 540
 541 #ifdef DEBUG_AUDIO
 542     dolog ("%s\n", name);
 543     audio_pcm_print_info ("hw", &sw->hw->info);
 544     audio_pcm_print_info ("sw", &sw->info);
 545 #endif
 546
 547     return sw;
 548
 549  fail:
 550     glue (AUD_close_, TYPE) (card, sw);
 551     return NULL;
 552 }
 553
 554 int glue (AUD_is_active_, TYPE) (SW *sw)
 555 {
 556     return sw ? sw->active : 0;
 557 }
 558
 559 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 560 {
 561     if (!sw) {
 562         return;
 563     }
 564
 565     ts->old_ts = sw->hw->ts_helper;
 566 }
 567
 568 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
 569 {
 570     uint64_t delta, cur_ts, old_ts;
 571
 572     if (!sw) {
 573         return 0;
 574     }
 575
 576     cur_ts = sw->hw->ts_helper;
 577     old_ts = ts->old_ts;
 578     /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
 579
 580     if (cur_ts >= old_ts) {
 581         delta = cur_ts - old_ts;
 582     } else {
 583         delta = UINT64_MAX - old_ts + cur_ts;
 584     }
 585
 586     if (!delta) {
 587         return 0;
 588     }
 589
 590     return muldiv64 (delta, sw->hw->info.freq, 1000000);
 591 }
 592
 593 #undef TYPE
 594 #undef HW
 595 #undef SW
 596 #undef HWBUF
 597 #undef NAME