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_PIPEWIRE 366 case AUDIODEV_DRIVER_PIPEWIRE: 367 return qapi_AudiodevPipewirePerDirectionOptions_base(dev->u.pipewire.TYPE); 368 #endif 369 #ifdef CONFIG_AUDIO_SDL 370 case AUDIODEV_DRIVER_SDL: 371 return qapi_AudiodevSdlPerDirectionOptions_base(dev->u.sdl.TYPE); 372 #endif 373 #ifdef CONFIG_AUDIO_SNDIO 374 case AUDIODEV_DRIVER_SNDIO: 375 return dev->u.sndio.TYPE; 376 #endif 377 #ifdef CONFIG_SPICE 378 case AUDIODEV_DRIVER_SPICE: 379 return dev->u.spice.TYPE; 380 #endif 381 case AUDIODEV_DRIVER_WAV: 382 return dev->u.wav.TYPE; 383 384 case AUDIODEV_DRIVER__MAX: 385 break; 386 } 387 abort(); 388 } 389 390 static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as) 391 { 392 HW *hw; 393 AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev); 394 395 if (!pdo->mixing_engine || pdo->fixed_settings) { 396 hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as); 397 if (!pdo->mixing_engine || hw) { 398 return hw; 399 } 400 } 401 402 hw = glue(audio_pcm_hw_find_specific_, TYPE)(s, NULL, as); 403 if (hw) { 404 return hw; 405 } 406 407 hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as); 408 if (hw) { 409 return hw; 410 } 411 412 return glue(audio_pcm_hw_find_any_, TYPE)(s, NULL); 413 } 414 415 static SW *glue(audio_pcm_create_voice_pair_, TYPE)( 416 AudioState *s, 417 const char *sw_name, 418 struct audsettings *as 419 ) 420 { 421 SW *sw; 422 HW *hw; 423 struct audsettings hw_as; 424 AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev); 425 426 if (pdo->fixed_settings) { 427 hw_as = audiodev_to_audsettings(pdo); 428 } else { 429 hw_as = *as; 430 } 431 432 sw = g_new0(SW, 1); 433 sw->s = s; 434 435 hw = glue(audio_pcm_hw_add_, TYPE)(s, &hw_as); 436 if (!hw) { 437 dolog("Could not create a backend for voice `%s'\n", sw_name); 438 goto err1; 439 } 440 441 glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw); 442 443 if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) { 444 goto err2; 445 } 446 447 return sw; 448 449 err2: 450 glue (audio_pcm_hw_del_sw_, TYPE) (sw); 451 glue (audio_pcm_hw_gc_, TYPE) (&hw); 452 err1: 453 g_free(sw); 454 return NULL; 455 } 456 457 static void glue (audio_close_, TYPE) (SW *sw) 458 { 459 glue (audio_pcm_sw_fini_, TYPE) (sw); 460 glue (audio_pcm_hw_del_sw_, TYPE) (sw); 461 glue (audio_pcm_hw_gc_, TYPE) (&sw->hw); 462 g_free (sw); 463 } 464 465 void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw) 466 { 467 if (sw) { 468 if (audio_bug(__func__, !card)) { 469 dolog ("card=%p\n", card); 470 return; 471 } 472 473 glue (audio_close_, TYPE) (sw); 474 } 475 } 476 477 SW *glue (AUD_open_, TYPE) ( 478 QEMUSoundCard *card, 479 SW *sw, 480 const char *name, 481 void *callback_opaque , 482 audio_callback_fn callback_fn, 483 struct audsettings *as 484 ) 485 { 486 AudioState *s; 487 AudiodevPerDirectionOptions *pdo; 488 489 if (audio_bug(__func__, !card || !name || !callback_fn || !as)) { 490 dolog ("card=%p name=%p callback_fn=%p as=%p\n", 491 card, name, callback_fn, as); 492 goto fail; 493 } 494 495 s = card->state; 496 pdo = glue(audio_get_pdo_, TYPE)(s->dev); 497 498 ldebug ("open %s, freq %d, nchannels %d, fmt %d\n", 499 name, as->freq, as->nchannels, as->fmt); 500 501 if (audio_bug(__func__, audio_validate_settings(as))) { 502 audio_print_settings (as); 503 goto fail; 504 } 505 506 if (audio_bug(__func__, !s->drv)) { 507 dolog ("Can not open `%s' (no host audio driver)\n", name); 508 goto fail; 509 } 510 511 if (sw && audio_pcm_info_eq (&sw->info, as)) { 512 return sw; 513 } 514 515 if (!pdo->fixed_settings && sw) { 516 glue (AUD_close_, TYPE) (card, sw); 517 sw = NULL; 518 } 519 520 if (sw) { 521 HW *hw = sw->hw; 522 523 if (!hw) { 524 dolog("Internal logic error: voice `%s' has no backend\n", 525 SW_NAME(sw)); 526 goto fail; 527 } 528 529 glue (audio_pcm_sw_fini_, TYPE) (sw); 530 if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) { 531 goto fail; 532 } 533 } else { 534 sw = glue(audio_pcm_create_voice_pair_, TYPE)(s, name, as); 535 if (!sw) { 536 return NULL; 537 } 538 } 539 540 sw->card = card; 541 sw->vol = nominal_volume; 542 sw->callback.fn = callback_fn; 543 sw->callback.opaque = callback_opaque; 544 545 #ifdef DEBUG_AUDIO 546 dolog ("%s\n", name); 547 audio_pcm_print_info ("hw", &sw->hw->info); 548 audio_pcm_print_info ("sw", &sw->info); 549 #endif 550 551 return sw; 552 553 fail: 554 glue (AUD_close_, TYPE) (card, sw); 555 return NULL; 556 } 557 558 int glue (AUD_is_active_, TYPE) (SW *sw) 559 { 560 return sw ? sw->active : 0; 561 } 562 563 void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts) 564 { 565 if (!sw) { 566 return; 567 } 568 569 ts->old_ts = sw->hw->ts_helper; 570 } 571 572 uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts) 573 { 574 uint64_t delta, cur_ts, old_ts; 575 576 if (!sw) { 577 return 0; 578 } 579 580 cur_ts = sw->hw->ts_helper; 581 old_ts = ts->old_ts; 582 /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */ 583 584 if (cur_ts >= old_ts) { 585 delta = cur_ts - old_ts; 586 } else { 587 delta = UINT64_MAX - old_ts + cur_ts; 588 } 589 590 if (!delta) { 591 return 0; 592 } 593 594 return muldiv64 (delta, sw->hw->info.freq, 1000000); 595 } 596 597 #undef TYPE 598 #undef HW 599 #undef SW 600 #undef HWBUF 601 #undef NAME 602