1 /* 2 * QEMU Audio subsystem 3 * 4 * Copyright (c) 2003-2005 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 #include "qemu/osdep.h" 26 #include "audio.h" 27 #include "migration/vmstate.h" 28 #include "monitor/monitor.h" 29 #include "qemu/timer.h" 30 #include "qapi/error.h" 31 #include "qapi/qobject-input-visitor.h" 32 #include "qapi/qapi-visit-audio.h" 33 #include "qemu/cutils.h" 34 #include "qemu/module.h" 35 #include "sysemu/replay.h" 36 #include "sysemu/runstate.h" 37 #include "trace.h" 38 39 #define AUDIO_CAP "audio" 40 #include "audio_int.h" 41 42 /* #define DEBUG_LIVE */ 43 /* #define DEBUG_OUT */ 44 /* #define DEBUG_CAPTURE */ 45 /* #define DEBUG_POLL */ 46 47 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 48 49 50 /* Order of CONFIG_AUDIO_DRIVERS is import. 51 The 1st one is the one used by default, that is the reason 52 that we generate the list. 53 */ 54 const char *audio_prio_list[] = { 55 "spice", 56 CONFIG_AUDIO_DRIVERS 57 "none", 58 "wav", 59 NULL 60 }; 61 62 static QLIST_HEAD(, audio_driver) audio_drivers; 63 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 64 65 void audio_driver_register(audio_driver *drv) 66 { 67 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 68 } 69 70 audio_driver *audio_driver_lookup(const char *name) 71 { 72 struct audio_driver *d; 73 74 QLIST_FOREACH(d, &audio_drivers, next) { 75 if (strcmp(name, d->name) == 0) { 76 return d; 77 } 78 } 79 80 audio_module_load_one(name); 81 QLIST_FOREACH(d, &audio_drivers, next) { 82 if (strcmp(name, d->name) == 0) { 83 return d; 84 } 85 } 86 87 return NULL; 88 } 89 90 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states = 91 QTAILQ_HEAD_INITIALIZER(audio_states); 92 93 const struct mixeng_volume nominal_volume = { 94 .mute = 0, 95 #ifdef FLOAT_MIXENG 96 .r = 1.0, 97 .l = 1.0, 98 #else 99 .r = 1ULL << 32, 100 .l = 1ULL << 32, 101 #endif 102 }; 103 104 static bool legacy_config = true; 105 106 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED 107 #error No its not 108 #else 109 int audio_bug (const char *funcname, int cond) 110 { 111 if (cond) { 112 static int shown; 113 114 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 115 if (!shown) { 116 shown = 1; 117 AUD_log (NULL, "Save all your work and restart without audio\n"); 118 AUD_log (NULL, "I am sorry\n"); 119 } 120 AUD_log (NULL, "Context:\n"); 121 122 #if defined AUDIO_BREAKPOINT_ON_BUG 123 # if defined HOST_I386 124 # if defined __GNUC__ 125 __asm__ ("int3"); 126 # elif defined _MSC_VER 127 _asm _emit 0xcc; 128 # else 129 abort (); 130 # endif 131 # else 132 abort (); 133 # endif 134 #endif 135 } 136 137 return cond; 138 } 139 #endif 140 141 static inline int audio_bits_to_index (int bits) 142 { 143 switch (bits) { 144 case 8: 145 return 0; 146 147 case 16: 148 return 1; 149 150 case 32: 151 return 2; 152 153 default: 154 audio_bug ("bits_to_index", 1); 155 AUD_log (NULL, "invalid bits %d\n", bits); 156 return 0; 157 } 158 } 159 160 void *audio_calloc (const char *funcname, int nmemb, size_t size) 161 { 162 int cond; 163 size_t len; 164 165 len = nmemb * size; 166 cond = !nmemb || !size; 167 cond |= nmemb < 0; 168 cond |= len < size; 169 170 if (audio_bug ("audio_calloc", cond)) { 171 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 172 funcname); 173 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 174 return NULL; 175 } 176 177 return g_malloc0 (len); 178 } 179 180 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 181 { 182 if (cap) { 183 fprintf(stderr, "%s: ", cap); 184 } 185 186 vfprintf(stderr, fmt, ap); 187 } 188 189 void AUD_log (const char *cap, const char *fmt, ...) 190 { 191 va_list ap; 192 193 va_start (ap, fmt); 194 AUD_vlog (cap, fmt, ap); 195 va_end (ap); 196 } 197 198 static void audio_print_settings (struct audsettings *as) 199 { 200 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 201 202 switch (as->fmt) { 203 case AUDIO_FORMAT_S8: 204 AUD_log (NULL, "S8"); 205 break; 206 case AUDIO_FORMAT_U8: 207 AUD_log (NULL, "U8"); 208 break; 209 case AUDIO_FORMAT_S16: 210 AUD_log (NULL, "S16"); 211 break; 212 case AUDIO_FORMAT_U16: 213 AUD_log (NULL, "U16"); 214 break; 215 case AUDIO_FORMAT_S32: 216 AUD_log (NULL, "S32"); 217 break; 218 case AUDIO_FORMAT_U32: 219 AUD_log (NULL, "U32"); 220 break; 221 default: 222 AUD_log (NULL, "invalid(%d)", as->fmt); 223 break; 224 } 225 226 AUD_log (NULL, " endianness="); 227 switch (as->endianness) { 228 case 0: 229 AUD_log (NULL, "little"); 230 break; 231 case 1: 232 AUD_log (NULL, "big"); 233 break; 234 default: 235 AUD_log (NULL, "invalid"); 236 break; 237 } 238 AUD_log (NULL, "\n"); 239 } 240 241 static int audio_validate_settings (struct audsettings *as) 242 { 243 int invalid; 244 245 invalid = as->nchannels != 1 && as->nchannels != 2; 246 invalid |= as->endianness != 0 && as->endianness != 1; 247 248 switch (as->fmt) { 249 case AUDIO_FORMAT_S8: 250 case AUDIO_FORMAT_U8: 251 case AUDIO_FORMAT_S16: 252 case AUDIO_FORMAT_U16: 253 case AUDIO_FORMAT_S32: 254 case AUDIO_FORMAT_U32: 255 break; 256 default: 257 invalid = 1; 258 break; 259 } 260 261 invalid |= as->freq <= 0; 262 return invalid ? -1 : 0; 263 } 264 265 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 266 { 267 int bits = 8, sign = 0; 268 269 switch (as->fmt) { 270 case AUDIO_FORMAT_S8: 271 sign = 1; 272 /* fall through */ 273 case AUDIO_FORMAT_U8: 274 break; 275 276 case AUDIO_FORMAT_S16: 277 sign = 1; 278 /* fall through */ 279 case AUDIO_FORMAT_U16: 280 bits = 16; 281 break; 282 283 case AUDIO_FORMAT_S32: 284 sign = 1; 285 /* fall through */ 286 case AUDIO_FORMAT_U32: 287 bits = 32; 288 break; 289 290 default: 291 abort(); 292 } 293 return info->freq == as->freq 294 && info->nchannels == as->nchannels 295 && info->sign == sign 296 && info->bits == bits 297 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 298 } 299 300 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 301 { 302 int bits = 8, sign = 0, shift = 0; 303 304 switch (as->fmt) { 305 case AUDIO_FORMAT_S8: 306 sign = 1; 307 case AUDIO_FORMAT_U8: 308 break; 309 310 case AUDIO_FORMAT_S16: 311 sign = 1; 312 /* fall through */ 313 case AUDIO_FORMAT_U16: 314 bits = 16; 315 shift = 1; 316 break; 317 318 case AUDIO_FORMAT_S32: 319 sign = 1; 320 /* fall through */ 321 case AUDIO_FORMAT_U32: 322 bits = 32; 323 shift = 2; 324 break; 325 326 default: 327 abort(); 328 } 329 330 info->freq = as->freq; 331 info->bits = bits; 332 info->sign = sign; 333 info->nchannels = as->nchannels; 334 info->shift = (as->nchannels == 2) + shift; 335 info->align = (1 << info->shift) - 1; 336 info->bytes_per_second = info->freq << info->shift; 337 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 338 } 339 340 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 341 { 342 if (!len) { 343 return; 344 } 345 346 if (info->sign) { 347 memset (buf, 0x00, len << info->shift); 348 } 349 else { 350 switch (info->bits) { 351 case 8: 352 memset (buf, 0x80, len << info->shift); 353 break; 354 355 case 16: 356 { 357 int i; 358 uint16_t *p = buf; 359 int shift = info->nchannels - 1; 360 short s = INT16_MAX; 361 362 if (info->swap_endianness) { 363 s = bswap16 (s); 364 } 365 366 for (i = 0; i < len << shift; i++) { 367 p[i] = s; 368 } 369 } 370 break; 371 372 case 32: 373 { 374 int i; 375 uint32_t *p = buf; 376 int shift = info->nchannels - 1; 377 int32_t s = INT32_MAX; 378 379 if (info->swap_endianness) { 380 s = bswap32 (s); 381 } 382 383 for (i = 0; i < len << shift; i++) { 384 p[i] = s; 385 } 386 } 387 break; 388 389 default: 390 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 391 info->bits); 392 break; 393 } 394 } 395 } 396 397 /* 398 * Capture 399 */ 400 static void noop_conv (struct st_sample *dst, const void *src, int samples) 401 { 402 (void) src; 403 (void) dst; 404 (void) samples; 405 } 406 407 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s, 408 struct audsettings *as) 409 { 410 CaptureVoiceOut *cap; 411 412 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 413 if (audio_pcm_info_eq (&cap->hw.info, as)) { 414 return cap; 415 } 416 } 417 return NULL; 418 } 419 420 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 421 { 422 struct capture_callback *cb; 423 424 #ifdef DEBUG_CAPTURE 425 dolog ("notification %d sent\n", cmd); 426 #endif 427 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 428 cb->ops.notify (cb->opaque, cmd); 429 } 430 } 431 432 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 433 { 434 if (cap->hw.enabled != enabled) { 435 audcnotification_e cmd; 436 cap->hw.enabled = enabled; 437 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 438 audio_notify_capture (cap, cmd); 439 } 440 } 441 442 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 443 { 444 HWVoiceOut *hw = &cap->hw; 445 SWVoiceOut *sw; 446 int enabled = 0; 447 448 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 449 if (sw->active) { 450 enabled = 1; 451 break; 452 } 453 } 454 audio_capture_maybe_changed (cap, enabled); 455 } 456 457 static void audio_detach_capture (HWVoiceOut *hw) 458 { 459 SWVoiceCap *sc = hw->cap_head.lh_first; 460 461 while (sc) { 462 SWVoiceCap *sc1 = sc->entries.le_next; 463 SWVoiceOut *sw = &sc->sw; 464 CaptureVoiceOut *cap = sc->cap; 465 int was_active = sw->active; 466 467 if (sw->rate) { 468 st_rate_stop (sw->rate); 469 sw->rate = NULL; 470 } 471 472 QLIST_REMOVE (sw, entries); 473 QLIST_REMOVE (sc, entries); 474 g_free (sc); 475 if (was_active) { 476 /* We have removed soft voice from the capture: 477 this might have changed the overall status of the capture 478 since this might have been the only active voice */ 479 audio_recalc_and_notify_capture (cap); 480 } 481 sc = sc1; 482 } 483 } 484 485 static int audio_attach_capture (HWVoiceOut *hw) 486 { 487 AudioState *s = hw->s; 488 CaptureVoiceOut *cap; 489 490 audio_detach_capture (hw); 491 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 492 SWVoiceCap *sc; 493 SWVoiceOut *sw; 494 HWVoiceOut *hw_cap = &cap->hw; 495 496 sc = g_malloc0(sizeof(*sc)); 497 498 sc->cap = cap; 499 sw = &sc->sw; 500 sw->hw = hw_cap; 501 sw->info = hw->info; 502 sw->empty = 1; 503 sw->active = hw->enabled; 504 sw->conv = noop_conv; 505 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 506 sw->vol = nominal_volume; 507 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 508 if (!sw->rate) { 509 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 510 g_free (sw); 511 return -1; 512 } 513 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 514 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 515 #ifdef DEBUG_CAPTURE 516 sw->name = g_strdup_printf ("for %p %d,%d,%d", 517 hw, sw->info.freq, sw->info.bits, 518 sw->info.nchannels); 519 dolog ("Added %s active = %d\n", sw->name, sw->active); 520 #endif 521 if (sw->active) { 522 audio_capture_maybe_changed (cap, 1); 523 } 524 } 525 return 0; 526 } 527 528 /* 529 * Hard voice (capture) 530 */ 531 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw) 532 { 533 SWVoiceIn *sw; 534 size_t m = hw->total_samples_captured; 535 536 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 537 if (sw->active) { 538 m = MIN (m, sw->total_hw_samples_acquired); 539 } 540 } 541 return m; 542 } 543 544 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw) 545 { 546 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 547 if (audio_bug(__func__, live > hw->conv_buf->size)) { 548 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 549 return 0; 550 } 551 return live; 552 } 553 554 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len) 555 { 556 size_t clipped = 0; 557 size_t pos = hw->mix_buf->pos; 558 559 while (len) { 560 st_sample *src = hw->mix_buf->samples + pos; 561 uint8_t *dst = advance(pcm_buf, clipped << hw->info.shift); 562 size_t samples_till_end_of_buf = hw->mix_buf->size - pos; 563 size_t samples_to_clip = MIN(len, samples_till_end_of_buf); 564 565 hw->clip(dst, src, samples_to_clip); 566 567 pos = (pos + samples_to_clip) % hw->mix_buf->size; 568 len -= samples_to_clip; 569 clipped += samples_to_clip; 570 } 571 } 572 573 /* 574 * Soft voice (capture) 575 */ 576 static size_t audio_pcm_sw_get_rpos_in(SWVoiceIn *sw) 577 { 578 HWVoiceIn *hw = sw->hw; 579 ssize_t live = hw->total_samples_captured - sw->total_hw_samples_acquired; 580 ssize_t rpos; 581 582 if (audio_bug(__func__, live < 0 || live > hw->conv_buf->size)) { 583 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 584 return 0; 585 } 586 587 rpos = hw->conv_buf->pos - live; 588 if (rpos >= 0) { 589 return rpos; 590 } 591 else { 592 return hw->conv_buf->size + rpos; 593 } 594 } 595 596 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size) 597 { 598 HWVoiceIn *hw = sw->hw; 599 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 600 struct st_sample *src, *dst = sw->buf; 601 602 rpos = audio_pcm_sw_get_rpos_in(sw) % hw->conv_buf->size; 603 604 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 605 if (audio_bug(__func__, live > hw->conv_buf->size)) { 606 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 607 return 0; 608 } 609 610 samples = size >> sw->info.shift; 611 if (!live) { 612 return 0; 613 } 614 615 swlim = (live * sw->ratio) >> 32; 616 swlim = MIN (swlim, samples); 617 618 while (swlim) { 619 src = hw->conv_buf->samples + rpos; 620 if (hw->conv_buf->pos > rpos) { 621 isamp = hw->conv_buf->pos - rpos; 622 } else { 623 isamp = hw->conv_buf->size - rpos; 624 } 625 626 if (!isamp) { 627 break; 628 } 629 osamp = swlim; 630 631 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 632 swlim -= osamp; 633 rpos = (rpos + isamp) % hw->conv_buf->size; 634 dst += osamp; 635 ret += osamp; 636 total += isamp; 637 } 638 639 if (!hw->pcm_ops->volume_in) { 640 mixeng_volume (sw->buf, ret, &sw->vol); 641 } 642 643 sw->clip (buf, sw->buf, ret); 644 sw->total_hw_samples_acquired += total; 645 return ret << sw->info.shift; 646 } 647 648 /* 649 * Hard voice (playback) 650 */ 651 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 652 { 653 SWVoiceOut *sw; 654 size_t m = SIZE_MAX; 655 int nb_live = 0; 656 657 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 658 if (sw->active || !sw->empty) { 659 m = MIN (m, sw->total_hw_samples_mixed); 660 nb_live += 1; 661 } 662 } 663 664 *nb_livep = nb_live; 665 return m; 666 } 667 668 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 669 { 670 size_t smin; 671 int nb_live1; 672 673 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 674 if (nb_live) { 675 *nb_live = nb_live1; 676 } 677 678 if (nb_live1) { 679 size_t live = smin; 680 681 if (audio_bug(__func__, live > hw->mix_buf->size)) { 682 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 683 return 0; 684 } 685 return live; 686 } 687 return 0; 688 } 689 690 /* 691 * Soft voice (playback) 692 */ 693 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size) 694 { 695 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 696 size_t ret = 0, pos = 0, total = 0; 697 698 if (!sw) { 699 return size; 700 } 701 702 hwsamples = sw->hw->mix_buf->size; 703 704 live = sw->total_hw_samples_mixed; 705 if (audio_bug(__func__, live > hwsamples)) { 706 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples); 707 return 0; 708 } 709 710 if (live == hwsamples) { 711 #ifdef DEBUG_OUT 712 dolog ("%s is full %d\n", sw->name, live); 713 #endif 714 return 0; 715 } 716 717 wpos = (sw->hw->mix_buf->pos + live) % hwsamples; 718 samples = size >> sw->info.shift; 719 720 dead = hwsamples - live; 721 swlim = ((int64_t) dead << 32) / sw->ratio; 722 swlim = MIN (swlim, samples); 723 if (swlim) { 724 sw->conv (sw->buf, buf, swlim); 725 726 if (!sw->hw->pcm_ops->volume_out) { 727 mixeng_volume (sw->buf, swlim, &sw->vol); 728 } 729 } 730 731 while (swlim) { 732 dead = hwsamples - live; 733 left = hwsamples - wpos; 734 blck = MIN (dead, left); 735 if (!blck) { 736 break; 737 } 738 isamp = swlim; 739 osamp = blck; 740 st_rate_flow_mix ( 741 sw->rate, 742 sw->buf + pos, 743 sw->hw->mix_buf->samples + wpos, 744 &isamp, 745 &osamp 746 ); 747 ret += isamp; 748 swlim -= isamp; 749 pos += isamp; 750 live += osamp; 751 wpos = (wpos + osamp) % hwsamples; 752 total += osamp; 753 } 754 755 sw->total_hw_samples_mixed += total; 756 sw->empty = sw->total_hw_samples_mixed == 0; 757 758 #ifdef DEBUG_OUT 759 dolog ( 760 "%s: write size %zu ret %zu total sw %zu\n", 761 SW_NAME (sw), 762 size >> sw->info.shift, 763 ret, 764 sw->total_hw_samples_mixed 765 ); 766 #endif 767 768 return ret << sw->info.shift; 769 } 770 771 #ifdef DEBUG_AUDIO 772 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 773 { 774 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n", 775 cap, info->bits, info->sign, info->freq, info->nchannels); 776 } 777 #endif 778 779 #define DAC 780 #include "audio_template.h" 781 #undef DAC 782 #include "audio_template.h" 783 784 /* 785 * Timer 786 */ 787 static int audio_is_timer_needed(AudioState *s) 788 { 789 HWVoiceIn *hwi = NULL; 790 HWVoiceOut *hwo = NULL; 791 792 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 793 if (!hwo->poll_mode) return 1; 794 } 795 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 796 if (!hwi->poll_mode) return 1; 797 } 798 return 0; 799 } 800 801 static void audio_reset_timer (AudioState *s) 802 { 803 if (audio_is_timer_needed(s)) { 804 timer_mod_anticipate_ns(s->ts, 805 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 806 if (!s->timer_running) { 807 s->timer_running = true; 808 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 809 trace_audio_timer_start(s->period_ticks / SCALE_MS); 810 } 811 } else { 812 timer_del(s->ts); 813 if (s->timer_running) { 814 s->timer_running = false; 815 trace_audio_timer_stop(); 816 } 817 } 818 } 819 820 static void audio_timer (void *opaque) 821 { 822 int64_t now, diff; 823 AudioState *s = opaque; 824 825 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 826 diff = now - s->timer_last; 827 if (diff > s->period_ticks * 3 / 2) { 828 trace_audio_timer_delayed(diff / SCALE_MS); 829 } 830 s->timer_last = now; 831 832 audio_run(s, "timer"); 833 audio_reset_timer(s); 834 } 835 836 /* 837 * Public API 838 */ 839 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size) 840 { 841 if (!sw) { 842 /* XXX: Consider options */ 843 return size; 844 } 845 846 if (!sw->hw->enabled) { 847 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 848 return 0; 849 } 850 851 return audio_pcm_sw_write(sw, buf, size); 852 } 853 854 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size) 855 { 856 if (!sw) { 857 /* XXX: Consider options */ 858 return size; 859 } 860 861 if (!sw->hw->enabled) { 862 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 863 return 0; 864 } 865 866 return audio_pcm_sw_read(sw, buf, size); 867 } 868 869 int AUD_get_buffer_size_out (SWVoiceOut *sw) 870 { 871 return sw->hw->mix_buf->size << sw->hw->info.shift; 872 } 873 874 void AUD_set_active_out (SWVoiceOut *sw, int on) 875 { 876 HWVoiceOut *hw; 877 878 if (!sw) { 879 return; 880 } 881 882 hw = sw->hw; 883 if (sw->active != on) { 884 AudioState *s = sw->s; 885 SWVoiceOut *temp_sw; 886 SWVoiceCap *sc; 887 888 if (on) { 889 hw->pending_disable = 0; 890 if (!hw->enabled) { 891 hw->enabled = 1; 892 if (s->vm_running) { 893 if (hw->pcm_ops->enable_out) { 894 hw->pcm_ops->enable_out(hw, true); 895 } 896 audio_reset_timer (s); 897 } 898 } 899 } 900 else { 901 if (hw->enabled) { 902 int nb_active = 0; 903 904 for (temp_sw = hw->sw_head.lh_first; temp_sw; 905 temp_sw = temp_sw->entries.le_next) { 906 nb_active += temp_sw->active != 0; 907 } 908 909 hw->pending_disable = nb_active == 1; 910 } 911 } 912 913 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 914 sc->sw.active = hw->enabled; 915 if (hw->enabled) { 916 audio_capture_maybe_changed (sc->cap, 1); 917 } 918 } 919 sw->active = on; 920 } 921 } 922 923 void AUD_set_active_in (SWVoiceIn *sw, int on) 924 { 925 HWVoiceIn *hw; 926 927 if (!sw) { 928 return; 929 } 930 931 hw = sw->hw; 932 if (sw->active != on) { 933 AudioState *s = sw->s; 934 SWVoiceIn *temp_sw; 935 936 if (on) { 937 if (!hw->enabled) { 938 hw->enabled = 1; 939 if (s->vm_running) { 940 if (hw->pcm_ops->enable_in) { 941 hw->pcm_ops->enable_in(hw, true); 942 } 943 audio_reset_timer (s); 944 } 945 } 946 sw->total_hw_samples_acquired = hw->total_samples_captured; 947 } 948 else { 949 if (hw->enabled) { 950 int nb_active = 0; 951 952 for (temp_sw = hw->sw_head.lh_first; temp_sw; 953 temp_sw = temp_sw->entries.le_next) { 954 nb_active += temp_sw->active != 0; 955 } 956 957 if (nb_active == 1) { 958 hw->enabled = 0; 959 if (hw->pcm_ops->enable_in) { 960 hw->pcm_ops->enable_in(hw, false); 961 } 962 } 963 } 964 } 965 sw->active = on; 966 } 967 } 968 969 static size_t audio_get_avail (SWVoiceIn *sw) 970 { 971 size_t live; 972 973 if (!sw) { 974 return 0; 975 } 976 977 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 978 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) { 979 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live, 980 sw->hw->conv_buf->size); 981 return 0; 982 } 983 984 ldebug ( 985 "%s: get_avail live %d ret %" PRId64 "\n", 986 SW_NAME (sw), 987 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift 988 ); 989 990 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift; 991 } 992 993 static size_t audio_get_free(SWVoiceOut *sw) 994 { 995 size_t live, dead; 996 997 if (!sw) { 998 return 0; 999 } 1000 1001 live = sw->total_hw_samples_mixed; 1002 1003 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) { 1004 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live, 1005 sw->hw->mix_buf->size); 1006 return 0; 1007 } 1008 1009 dead = sw->hw->mix_buf->size - live; 1010 1011 #ifdef DEBUG_OUT 1012 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1013 SW_NAME (sw), 1014 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift); 1015 #endif 1016 1017 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift; 1018 } 1019 1020 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos, 1021 size_t samples) 1022 { 1023 size_t n; 1024 1025 if (hw->enabled) { 1026 SWVoiceCap *sc; 1027 1028 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1029 SWVoiceOut *sw = &sc->sw; 1030 int rpos2 = rpos; 1031 1032 n = samples; 1033 while (n) { 1034 size_t till_end_of_hw = hw->mix_buf->size - rpos2; 1035 size_t to_write = MIN(till_end_of_hw, n); 1036 size_t bytes = to_write << hw->info.shift; 1037 size_t written; 1038 1039 sw->buf = hw->mix_buf->samples + rpos2; 1040 written = audio_pcm_sw_write (sw, NULL, bytes); 1041 if (written - bytes) { 1042 dolog("Could not mix %zu bytes into a capture " 1043 "buffer, mixed %zu\n", 1044 bytes, written); 1045 break; 1046 } 1047 n -= to_write; 1048 rpos2 = (rpos2 + to_write) % hw->mix_buf->size; 1049 } 1050 } 1051 } 1052 1053 n = MIN(samples, hw->mix_buf->size - rpos); 1054 mixeng_clear(hw->mix_buf->samples + rpos, n); 1055 mixeng_clear(hw->mix_buf->samples, samples - n); 1056 } 1057 1058 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live) 1059 { 1060 size_t clipped = 0; 1061 1062 while (live) { 1063 size_t size, decr, proc; 1064 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1065 if (!buf) { 1066 /* retrying will likely won't help, drop everything. */ 1067 hw->mix_buf->pos = (hw->mix_buf->pos + live) % hw->mix_buf->size; 1068 return clipped + live; 1069 } 1070 1071 decr = MIN(size >> hw->info.shift, live); 1072 audio_pcm_hw_clip_out(hw, buf, decr); 1073 proc = hw->pcm_ops->put_buffer_out(hw, buf, decr << hw->info.shift) >> 1074 hw->info.shift; 1075 1076 live -= proc; 1077 clipped += proc; 1078 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size; 1079 1080 if (proc == 0 || proc < decr) { 1081 break; 1082 } 1083 } 1084 1085 return clipped; 1086 } 1087 1088 static void audio_run_out (AudioState *s) 1089 { 1090 HWVoiceOut *hw = NULL; 1091 SWVoiceOut *sw; 1092 1093 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1094 size_t played, live, prev_rpos, free; 1095 int nb_live, cleanup_required; 1096 1097 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1098 if (!nb_live) { 1099 live = 0; 1100 } 1101 1102 if (audio_bug(__func__, live > hw->mix_buf->size)) { 1103 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 1104 continue; 1105 } 1106 1107 if (hw->pending_disable && !nb_live) { 1108 SWVoiceCap *sc; 1109 #ifdef DEBUG_OUT 1110 dolog ("Disabling voice\n"); 1111 #endif 1112 hw->enabled = 0; 1113 hw->pending_disable = 0; 1114 if (hw->pcm_ops->enable_out) { 1115 hw->pcm_ops->enable_out(hw, false); 1116 } 1117 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1118 sc->sw.active = 0; 1119 audio_recalc_and_notify_capture (sc->cap); 1120 } 1121 continue; 1122 } 1123 1124 if (!live) { 1125 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1126 if (sw->active) { 1127 free = audio_get_free (sw); 1128 if (free > 0) { 1129 sw->callback.fn (sw->callback.opaque, free); 1130 } 1131 } 1132 } 1133 continue; 1134 } 1135 1136 prev_rpos = hw->mix_buf->pos; 1137 played = audio_pcm_hw_run_out(hw, live); 1138 replay_audio_out(&played); 1139 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) { 1140 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n", 1141 hw->mix_buf->pos, hw->mix_buf->size, played); 1142 hw->mix_buf->pos = 0; 1143 } 1144 1145 #ifdef DEBUG_OUT 1146 dolog("played=%zu\n", played); 1147 #endif 1148 1149 if (played) { 1150 hw->ts_helper += played; 1151 audio_capture_mix_and_clear (hw, prev_rpos, played); 1152 } 1153 1154 cleanup_required = 0; 1155 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1156 if (!sw->active && sw->empty) { 1157 continue; 1158 } 1159 1160 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1161 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1162 played, sw->total_hw_samples_mixed); 1163 played = sw->total_hw_samples_mixed; 1164 } 1165 1166 sw->total_hw_samples_mixed -= played; 1167 1168 if (!sw->total_hw_samples_mixed) { 1169 sw->empty = 1; 1170 cleanup_required |= !sw->active && !sw->callback.fn; 1171 } 1172 1173 if (sw->active) { 1174 free = audio_get_free (sw); 1175 if (free > 0) { 1176 sw->callback.fn (sw->callback.opaque, free); 1177 } 1178 } 1179 } 1180 1181 if (cleanup_required) { 1182 SWVoiceOut *sw1; 1183 1184 sw = hw->sw_head.lh_first; 1185 while (sw) { 1186 sw1 = sw->entries.le_next; 1187 if (!sw->active && !sw->callback.fn) { 1188 audio_close_out (sw); 1189 } 1190 sw = sw1; 1191 } 1192 } 1193 } 1194 } 1195 1196 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1197 { 1198 size_t conv = 0; 1199 STSampleBuffer *conv_buf = hw->conv_buf; 1200 1201 while (samples) { 1202 size_t proc; 1203 size_t size = samples << hw->info.shift; 1204 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1205 1206 assert((size & hw->info.align) == 0); 1207 if (size == 0) { 1208 hw->pcm_ops->put_buffer_in(hw, buf, size); 1209 break; 1210 } 1211 1212 proc = MIN(size >> hw->info.shift, 1213 conv_buf->size - conv_buf->pos); 1214 1215 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc); 1216 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 1217 1218 samples -= proc; 1219 conv += proc; 1220 hw->pcm_ops->put_buffer_in(hw, buf, proc << hw->info.shift); 1221 } 1222 1223 return conv; 1224 } 1225 1226 static void audio_run_in (AudioState *s) 1227 { 1228 HWVoiceIn *hw = NULL; 1229 1230 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1231 SWVoiceIn *sw; 1232 size_t captured = 0, min; 1233 1234 if (replay_mode != REPLAY_MODE_PLAY) { 1235 captured = audio_pcm_hw_run_in( 1236 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw)); 1237 } 1238 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos, 1239 hw->conv_buf->size); 1240 1241 min = audio_pcm_hw_find_min_in (hw); 1242 hw->total_samples_captured += captured - min; 1243 hw->ts_helper += captured; 1244 1245 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1246 sw->total_hw_samples_acquired -= min; 1247 1248 if (sw->active) { 1249 size_t avail; 1250 1251 avail = audio_get_avail (sw); 1252 if (avail > 0) { 1253 sw->callback.fn (sw->callback.opaque, avail); 1254 } 1255 } 1256 } 1257 } 1258 } 1259 1260 static void audio_run_capture (AudioState *s) 1261 { 1262 CaptureVoiceOut *cap; 1263 1264 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1265 size_t live, rpos, captured; 1266 HWVoiceOut *hw = &cap->hw; 1267 SWVoiceOut *sw; 1268 1269 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1270 rpos = hw->mix_buf->pos; 1271 while (live) { 1272 size_t left = hw->mix_buf->size - rpos; 1273 size_t to_capture = MIN(live, left); 1274 struct st_sample *src; 1275 struct capture_callback *cb; 1276 1277 src = hw->mix_buf->samples + rpos; 1278 hw->clip (cap->buf, src, to_capture); 1279 mixeng_clear (src, to_capture); 1280 1281 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1282 cb->ops.capture (cb->opaque, cap->buf, 1283 to_capture << hw->info.shift); 1284 } 1285 rpos = (rpos + to_capture) % hw->mix_buf->size; 1286 live -= to_capture; 1287 } 1288 hw->mix_buf->pos = rpos; 1289 1290 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1291 if (!sw->active && sw->empty) { 1292 continue; 1293 } 1294 1295 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1296 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1297 captured, sw->total_hw_samples_mixed); 1298 captured = sw->total_hw_samples_mixed; 1299 } 1300 1301 sw->total_hw_samples_mixed -= captured; 1302 sw->empty = sw->total_hw_samples_mixed == 0; 1303 } 1304 } 1305 } 1306 1307 void audio_run(AudioState *s, const char *msg) 1308 { 1309 audio_run_out(s); 1310 audio_run_in(s); 1311 audio_run_capture(s); 1312 1313 #ifdef DEBUG_POLL 1314 { 1315 static double prevtime; 1316 double currtime; 1317 struct timeval tv; 1318 1319 if (gettimeofday (&tv, NULL)) { 1320 perror ("audio_run: gettimeofday"); 1321 return; 1322 } 1323 1324 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1325 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1326 prevtime = currtime; 1327 } 1328 #endif 1329 } 1330 1331 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1332 { 1333 ssize_t start; 1334 1335 if (unlikely(!hw->buf_emul)) { 1336 size_t calc_size = hw->conv_buf->size << hw->info.shift; 1337 hw->buf_emul = g_malloc(calc_size); 1338 hw->size_emul = calc_size; 1339 hw->pos_emul = hw->pending_emul = 0; 1340 } 1341 1342 while (hw->pending_emul < hw->size_emul) { 1343 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1344 hw->size_emul - hw->pending_emul); 1345 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1346 read_len); 1347 hw->pending_emul += read; 1348 if (read < read_len) { 1349 break; 1350 } 1351 } 1352 1353 start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1354 if (start < 0) { 1355 start += hw->size_emul; 1356 } 1357 assert(start >= 0 && start < hw->size_emul); 1358 1359 *size = MIN(hw->pending_emul, hw->size_emul - start); 1360 return hw->buf_emul + start; 1361 } 1362 1363 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1364 { 1365 assert(size <= hw->pending_emul); 1366 hw->pending_emul -= size; 1367 } 1368 1369 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1370 { 1371 if (unlikely(!hw->buf_emul)) { 1372 size_t calc_size = hw->mix_buf->size << hw->info.shift; 1373 1374 hw->buf_emul = g_malloc(calc_size); 1375 hw->size_emul = calc_size; 1376 hw->pos_emul = hw->pending_emul = 0; 1377 } 1378 1379 *size = MIN(hw->size_emul - hw->pending_emul, 1380 hw->size_emul - hw->pos_emul); 1381 return hw->buf_emul + hw->pos_emul; 1382 } 1383 1384 size_t audio_generic_put_buffer_out_nowrite(HWVoiceOut *hw, void *buf, 1385 size_t size) 1386 { 1387 assert(buf == hw->buf_emul + hw->pos_emul && 1388 size + hw->pending_emul <= hw->size_emul); 1389 1390 hw->pending_emul += size; 1391 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1392 1393 return size; 1394 } 1395 1396 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1397 { 1398 audio_generic_put_buffer_out_nowrite(hw, buf, size); 1399 1400 while (hw->pending_emul) { 1401 size_t write_len, written; 1402 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1403 if (start < 0) { 1404 start += hw->size_emul; 1405 } 1406 assert(start >= 0 && start < hw->size_emul); 1407 1408 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1409 1410 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1411 hw->pending_emul -= written; 1412 1413 if (written < write_len) { 1414 break; 1415 } 1416 } 1417 1418 /* 1419 * fake we have written everything. non-written data remain in pending_emul, 1420 * so we do not have to clip them multiple times 1421 */ 1422 return size; 1423 } 1424 1425 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1426 { 1427 size_t dst_size, copy_size; 1428 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1429 copy_size = MIN(size, dst_size); 1430 1431 memcpy(dst, buf, copy_size); 1432 return hw->pcm_ops->put_buffer_out(hw, buf, copy_size); 1433 } 1434 1435 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1436 { 1437 size_t dst_size, copy_size; 1438 void *dst = hw->pcm_ops->get_buffer_in(hw, &dst_size); 1439 copy_size = MIN(size, dst_size); 1440 1441 memcpy(dst, buf, copy_size); 1442 hw->pcm_ops->put_buffer_in(hw, buf, copy_size); 1443 return copy_size; 1444 } 1445 1446 1447 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1448 bool msg, Audiodev *dev) 1449 { 1450 s->drv_opaque = drv->init(dev); 1451 1452 if (s->drv_opaque) { 1453 if (!drv->pcm_ops->get_buffer_in) { 1454 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1455 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1456 } 1457 if (!drv->pcm_ops->get_buffer_out) { 1458 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1459 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1460 } 1461 1462 audio_init_nb_voices_out(s, drv); 1463 audio_init_nb_voices_in(s, drv); 1464 s->drv = drv; 1465 return 0; 1466 } 1467 else { 1468 if (msg) { 1469 dolog("Could not init `%s' audio driver\n", drv->name); 1470 } 1471 return -1; 1472 } 1473 } 1474 1475 static void audio_vm_change_state_handler (void *opaque, int running, 1476 RunState state) 1477 { 1478 AudioState *s = opaque; 1479 HWVoiceOut *hwo = NULL; 1480 HWVoiceIn *hwi = NULL; 1481 1482 s->vm_running = running; 1483 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1484 if (hwo->pcm_ops->enable_out) { 1485 hwo->pcm_ops->enable_out(hwo, running); 1486 } 1487 } 1488 1489 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1490 if (hwi->pcm_ops->enable_in) { 1491 hwi->pcm_ops->enable_in(hwi, running); 1492 } 1493 } 1494 audio_reset_timer (s); 1495 } 1496 1497 static bool is_cleaning_up; 1498 1499 bool audio_is_cleaning_up(void) 1500 { 1501 return is_cleaning_up; 1502 } 1503 1504 static void free_audio_state(AudioState *s) 1505 { 1506 HWVoiceOut *hwo, *hwon; 1507 HWVoiceIn *hwi, *hwin; 1508 1509 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1510 SWVoiceCap *sc; 1511 1512 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1513 hwo->pcm_ops->enable_out(hwo, false); 1514 } 1515 hwo->pcm_ops->fini_out (hwo); 1516 1517 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1518 CaptureVoiceOut *cap = sc->cap; 1519 struct capture_callback *cb; 1520 1521 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1522 cb->ops.destroy (cb->opaque); 1523 } 1524 } 1525 QLIST_REMOVE(hwo, entries); 1526 } 1527 1528 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1529 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1530 hwi->pcm_ops->enable_in(hwi, false); 1531 } 1532 hwi->pcm_ops->fini_in (hwi); 1533 QLIST_REMOVE(hwi, entries); 1534 } 1535 1536 if (s->drv) { 1537 s->drv->fini (s->drv_opaque); 1538 s->drv = NULL; 1539 } 1540 1541 if (s->dev) { 1542 qapi_free_Audiodev(s->dev); 1543 s->dev = NULL; 1544 } 1545 1546 if (s->ts) { 1547 timer_free(s->ts); 1548 s->ts = NULL; 1549 } 1550 1551 g_free(s); 1552 } 1553 1554 void audio_cleanup(void) 1555 { 1556 is_cleaning_up = true; 1557 while (!QTAILQ_EMPTY(&audio_states)) { 1558 AudioState *s = QTAILQ_FIRST(&audio_states); 1559 QTAILQ_REMOVE(&audio_states, s, list); 1560 free_audio_state(s); 1561 } 1562 } 1563 1564 static const VMStateDescription vmstate_audio = { 1565 .name = "audio", 1566 .version_id = 1, 1567 .minimum_version_id = 1, 1568 .fields = (VMStateField[]) { 1569 VMSTATE_END_OF_LIST() 1570 } 1571 }; 1572 1573 static void audio_validate_opts(Audiodev *dev, Error **errp); 1574 1575 static AudiodevListEntry *audiodev_find( 1576 AudiodevListHead *head, const char *drvname) 1577 { 1578 AudiodevListEntry *e; 1579 QSIMPLEQ_FOREACH(e, head, next) { 1580 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1581 return e; 1582 } 1583 } 1584 1585 return NULL; 1586 } 1587 1588 /* 1589 * if we have dev, this function was called because of an -audiodev argument => 1590 * initialize a new state with it 1591 * if dev == NULL => legacy implicit initialization, return the already created 1592 * state or create a new one 1593 */ 1594 static AudioState *audio_init(Audiodev *dev, const char *name) 1595 { 1596 static bool atexit_registered; 1597 size_t i; 1598 int done = 0; 1599 const char *drvname = NULL; 1600 VMChangeStateEntry *e; 1601 AudioState *s; 1602 struct audio_driver *driver; 1603 /* silence gcc warning about uninitialized variable */ 1604 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1605 1606 if (dev) { 1607 /* -audiodev option */ 1608 legacy_config = false; 1609 drvname = AudiodevDriver_str(dev->driver); 1610 } else if (!QTAILQ_EMPTY(&audio_states)) { 1611 if (!legacy_config) { 1612 dolog("Device %s: audiodev default parameter is deprecated, please " 1613 "specify audiodev=%s\n", name, 1614 QTAILQ_FIRST(&audio_states)->dev->id); 1615 } 1616 return QTAILQ_FIRST(&audio_states); 1617 } else { 1618 /* legacy implicit initialization */ 1619 head = audio_handle_legacy_opts(); 1620 /* 1621 * In case of legacy initialization, all Audiodevs in the list will have 1622 * the same configuration (except the driver), so it does't matter which 1623 * one we chose. We need an Audiodev to set up AudioState before we can 1624 * init a driver. Also note that dev at this point is still in the 1625 * list. 1626 */ 1627 dev = QSIMPLEQ_FIRST(&head)->dev; 1628 audio_validate_opts(dev, &error_abort); 1629 } 1630 1631 s = g_malloc0(sizeof(AudioState)); 1632 s->dev = dev; 1633 1634 QLIST_INIT (&s->hw_head_out); 1635 QLIST_INIT (&s->hw_head_in); 1636 QLIST_INIT (&s->cap_head); 1637 if (!atexit_registered) { 1638 atexit(audio_cleanup); 1639 atexit_registered = true; 1640 } 1641 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1642 1643 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1644 1645 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1646 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1647 1648 if (s->nb_hw_voices_out <= 0) { 1649 dolog ("Bogus number of playback voices %d, setting to 1\n", 1650 s->nb_hw_voices_out); 1651 s->nb_hw_voices_out = 1; 1652 } 1653 1654 if (s->nb_hw_voices_in <= 0) { 1655 dolog ("Bogus number of capture voices %d, setting to 0\n", 1656 s->nb_hw_voices_in); 1657 s->nb_hw_voices_in = 0; 1658 } 1659 1660 if (drvname) { 1661 driver = audio_driver_lookup(drvname); 1662 if (driver) { 1663 done = !audio_driver_init(s, driver, true, dev); 1664 } else { 1665 dolog ("Unknown audio driver `%s'\n", drvname); 1666 } 1667 } else { 1668 for (i = 0; audio_prio_list[i]; i++) { 1669 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1670 driver = audio_driver_lookup(audio_prio_list[i]); 1671 1672 if (e && driver) { 1673 s->dev = dev = e->dev; 1674 audio_validate_opts(dev, &error_abort); 1675 done = !audio_driver_init(s, driver, false, dev); 1676 if (done) { 1677 e->dev = NULL; 1678 break; 1679 } 1680 } 1681 } 1682 } 1683 audio_free_audiodev_list(&head); 1684 1685 if (!done) { 1686 driver = audio_driver_lookup("none"); 1687 done = !audio_driver_init(s, driver, false, dev); 1688 assert(done); 1689 dolog("warning: Using timer based audio emulation\n"); 1690 } 1691 1692 if (dev->timer_period <= 0) { 1693 s->period_ticks = 1; 1694 } else { 1695 s->period_ticks = dev->timer_period * SCALE_US; 1696 } 1697 1698 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1699 if (!e) { 1700 dolog ("warning: Could not register change state handler\n" 1701 "(Audio can continue looping even after stopping the VM)\n"); 1702 } 1703 1704 QLIST_INIT (&s->card_head); 1705 vmstate_register (NULL, 0, &vmstate_audio, s); 1706 return s; 1707 } 1708 1709 void audio_free_audiodev_list(AudiodevListHead *head) 1710 { 1711 AudiodevListEntry *e; 1712 while ((e = QSIMPLEQ_FIRST(head))) { 1713 QSIMPLEQ_REMOVE_HEAD(head, next); 1714 qapi_free_Audiodev(e->dev); 1715 g_free(e); 1716 } 1717 } 1718 1719 void AUD_register_card (const char *name, QEMUSoundCard *card) 1720 { 1721 if (!card->state) { 1722 card->state = audio_init(NULL, name); 1723 } 1724 1725 card->name = g_strdup (name); 1726 memset (&card->entries, 0, sizeof (card->entries)); 1727 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1728 } 1729 1730 void AUD_remove_card (QEMUSoundCard *card) 1731 { 1732 QLIST_REMOVE (card, entries); 1733 g_free (card->name); 1734 } 1735 1736 1737 CaptureVoiceOut *AUD_add_capture( 1738 AudioState *s, 1739 struct audsettings *as, 1740 struct audio_capture_ops *ops, 1741 void *cb_opaque 1742 ) 1743 { 1744 CaptureVoiceOut *cap; 1745 struct capture_callback *cb; 1746 1747 if (!s) { 1748 if (!legacy_config) { 1749 dolog("Capturing without setting an audiodev is deprecated\n"); 1750 } 1751 s = audio_init(NULL, NULL); 1752 } 1753 1754 if (audio_validate_settings (as)) { 1755 dolog ("Invalid settings were passed when trying to add capture\n"); 1756 audio_print_settings (as); 1757 return NULL; 1758 } 1759 1760 cb = g_malloc0(sizeof(*cb)); 1761 cb->ops = *ops; 1762 cb->opaque = cb_opaque; 1763 1764 cap = audio_pcm_capture_find_specific(s, as); 1765 if (cap) { 1766 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1767 return cap; 1768 } 1769 else { 1770 HWVoiceOut *hw; 1771 CaptureVoiceOut *cap; 1772 1773 cap = g_malloc0(sizeof(*cap)); 1774 1775 hw = &cap->hw; 1776 hw->s = s; 1777 QLIST_INIT (&hw->sw_head); 1778 QLIST_INIT (&cap->cb_head); 1779 1780 /* XXX find a more elegant way */ 1781 hw->samples = 4096 * 4; 1782 audio_pcm_hw_alloc_resources_out(hw); 1783 1784 audio_pcm_init_info (&hw->info, as); 1785 1786 cap->buf = g_malloc0_n(hw->mix_buf->size, 1 << hw->info.shift); 1787 1788 hw->clip = mixeng_clip 1789 [hw->info.nchannels == 2] 1790 [hw->info.sign] 1791 [hw->info.swap_endianness] 1792 [audio_bits_to_index (hw->info.bits)]; 1793 1794 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1795 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1796 1797 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1798 audio_attach_capture (hw); 1799 } 1800 return cap; 1801 } 1802 } 1803 1804 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1805 { 1806 struct capture_callback *cb; 1807 1808 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1809 if (cb->opaque == cb_opaque) { 1810 cb->ops.destroy (cb_opaque); 1811 QLIST_REMOVE (cb, entries); 1812 g_free (cb); 1813 1814 if (!cap->cb_head.lh_first) { 1815 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1816 1817 while (sw) { 1818 SWVoiceCap *sc = (SWVoiceCap *) sw; 1819 #ifdef DEBUG_CAPTURE 1820 dolog ("freeing %s\n", sw->name); 1821 #endif 1822 1823 sw1 = sw->entries.le_next; 1824 if (sw->rate) { 1825 st_rate_stop (sw->rate); 1826 sw->rate = NULL; 1827 } 1828 QLIST_REMOVE (sw, entries); 1829 QLIST_REMOVE (sc, entries); 1830 g_free (sc); 1831 sw = sw1; 1832 } 1833 QLIST_REMOVE (cap, entries); 1834 g_free (cap->hw.mix_buf); 1835 g_free (cap->buf); 1836 g_free (cap); 1837 } 1838 return; 1839 } 1840 } 1841 } 1842 1843 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1844 { 1845 if (sw) { 1846 HWVoiceOut *hw = sw->hw; 1847 1848 sw->vol.mute = mute; 1849 sw->vol.l = nominal_volume.l * lvol / 255; 1850 sw->vol.r = nominal_volume.r * rvol / 255; 1851 1852 if (hw->pcm_ops->volume_out) { 1853 hw->pcm_ops->volume_out(hw, &sw->vol); 1854 } 1855 } 1856 } 1857 1858 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1859 { 1860 if (sw) { 1861 HWVoiceIn *hw = sw->hw; 1862 1863 sw->vol.mute = mute; 1864 sw->vol.l = nominal_volume.l * lvol / 255; 1865 sw->vol.r = nominal_volume.r * rvol / 255; 1866 1867 if (hw->pcm_ops->volume_in) { 1868 hw->pcm_ops->volume_in(hw, &sw->vol); 1869 } 1870 } 1871 } 1872 1873 void audio_create_pdos(Audiodev *dev) 1874 { 1875 switch (dev->driver) { 1876 #define CASE(DRIVER, driver, pdo_name) \ 1877 case AUDIODEV_DRIVER_##DRIVER: \ 1878 if (!dev->u.driver.has_in) { \ 1879 dev->u.driver.in = g_malloc0( \ 1880 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1881 dev->u.driver.has_in = true; \ 1882 } \ 1883 if (!dev->u.driver.has_out) { \ 1884 dev->u.driver.out = g_malloc0( \ 1885 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1886 dev->u.driver.has_out = true; \ 1887 } \ 1888 break 1889 1890 CASE(NONE, none, ); 1891 CASE(ALSA, alsa, Alsa); 1892 CASE(COREAUDIO, coreaudio, Coreaudio); 1893 CASE(DSOUND, dsound, ); 1894 CASE(OSS, oss, Oss); 1895 CASE(PA, pa, Pa); 1896 CASE(SDL, sdl, ); 1897 CASE(SPICE, spice, ); 1898 CASE(WAV, wav, ); 1899 1900 case AUDIODEV_DRIVER__MAX: 1901 abort(); 1902 }; 1903 } 1904 1905 static void audio_validate_per_direction_opts( 1906 AudiodevPerDirectionOptions *pdo, Error **errp) 1907 { 1908 if (!pdo->has_fixed_settings) { 1909 pdo->has_fixed_settings = true; 1910 pdo->fixed_settings = true; 1911 } 1912 if (!pdo->fixed_settings && 1913 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1914 error_setg(errp, 1915 "You can't use frequency, channels or format with fixed-settings=off"); 1916 return; 1917 } 1918 1919 if (!pdo->has_frequency) { 1920 pdo->has_frequency = true; 1921 pdo->frequency = 44100; 1922 } 1923 if (!pdo->has_channels) { 1924 pdo->has_channels = true; 1925 pdo->channels = 2; 1926 } 1927 if (!pdo->has_voices) { 1928 pdo->has_voices = true; 1929 pdo->voices = 1; 1930 } 1931 if (!pdo->has_format) { 1932 pdo->has_format = true; 1933 pdo->format = AUDIO_FORMAT_S16; 1934 } 1935 } 1936 1937 static void audio_validate_opts(Audiodev *dev, Error **errp) 1938 { 1939 Error *err = NULL; 1940 1941 audio_create_pdos(dev); 1942 1943 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 1944 if (err) { 1945 error_propagate(errp, err); 1946 return; 1947 } 1948 1949 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 1950 if (err) { 1951 error_propagate(errp, err); 1952 return; 1953 } 1954 1955 if (!dev->has_timer_period) { 1956 dev->has_timer_period = true; 1957 dev->timer_period = 10000; /* 100Hz -> 10ms */ 1958 } 1959 } 1960 1961 void audio_parse_option(const char *opt) 1962 { 1963 AudiodevListEntry *e; 1964 Audiodev *dev = NULL; 1965 1966 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 1967 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 1968 visit_free(v); 1969 1970 audio_validate_opts(dev, &error_fatal); 1971 1972 e = g_malloc0(sizeof(AudiodevListEntry)); 1973 e->dev = dev; 1974 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 1975 } 1976 1977 void audio_init_audiodevs(void) 1978 { 1979 AudiodevListEntry *e; 1980 1981 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 1982 audio_init(e->dev, NULL); 1983 } 1984 } 1985 1986 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 1987 { 1988 return (audsettings) { 1989 .freq = pdo->frequency, 1990 .nchannels = pdo->channels, 1991 .fmt = pdo->format, 1992 .endianness = AUDIO_HOST_ENDIANNESS, 1993 }; 1994 } 1995 1996 int audioformat_bytes_per_sample(AudioFormat fmt) 1997 { 1998 switch (fmt) { 1999 case AUDIO_FORMAT_U8: 2000 case AUDIO_FORMAT_S8: 2001 return 1; 2002 2003 case AUDIO_FORMAT_U16: 2004 case AUDIO_FORMAT_S16: 2005 return 2; 2006 2007 case AUDIO_FORMAT_U32: 2008 case AUDIO_FORMAT_S32: 2009 return 4; 2010 2011 case AUDIO_FORMAT__MAX: 2012 ; 2013 } 2014 abort(); 2015 } 2016 2017 2018 /* frames = freq * usec / 1e6 */ 2019 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2020 audsettings *as, int def_usecs) 2021 { 2022 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2023 return (as->freq * usecs + 500000) / 1000000; 2024 } 2025 2026 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2027 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2028 audsettings *as, int def_usecs) 2029 { 2030 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2031 } 2032 2033 /* 2034 * bytes = bytes_per_sample * samples = 2035 * bytes_per_sample * channels * freq * usec / 1e6 2036 */ 2037 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2038 audsettings *as, int def_usecs) 2039 { 2040 return audio_buffer_samples(pdo, as, def_usecs) * 2041 audioformat_bytes_per_sample(as->fmt); 2042 } 2043 2044 AudioState *audio_state_by_name(const char *name) 2045 { 2046 AudioState *s; 2047 QTAILQ_FOREACH(s, &audio_states, list) { 2048 assert(s->dev); 2049 if (strcmp(name, s->dev->id) == 0) { 2050 return s; 2051 } 2052 } 2053 return NULL; 2054 } 2055 2056 const char *audio_get_id(QEMUSoundCard *card) 2057 { 2058 if (card->state) { 2059 assert(card->state->dev); 2060 return card->state->dev->id; 2061 } else { 2062 return ""; 2063 } 2064 } 2065 2066 void audio_rate_start(RateCtl *rate) 2067 { 2068 memset(rate, 0, sizeof(RateCtl)); 2069 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2070 } 2071 2072 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, 2073 size_t bytes_avail) 2074 { 2075 int64_t now; 2076 int64_t ticks; 2077 int64_t bytes; 2078 int64_t samples; 2079 size_t ret; 2080 2081 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2082 ticks = now - rate->start_ticks; 2083 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2084 samples = (bytes - rate->bytes_sent) >> info->shift; 2085 if (samples < 0 || samples > 65536) { 2086 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples); 2087 audio_rate_start(rate); 2088 samples = 0; 2089 } 2090 2091 ret = MIN(samples << info->shift, bytes_avail); 2092 rate->bytes_sent += ret; 2093 return ret; 2094 } 2095