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; 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, mul; 303 304 switch (as->fmt) { 305 case AUDIO_FORMAT_S8: 306 sign = 1; 307 case AUDIO_FORMAT_U8: 308 mul = 1; 309 break; 310 311 case AUDIO_FORMAT_S16: 312 sign = 1; 313 /* fall through */ 314 case AUDIO_FORMAT_U16: 315 bits = 16; 316 mul = 2; 317 break; 318 319 case AUDIO_FORMAT_S32: 320 sign = 1; 321 /* fall through */ 322 case AUDIO_FORMAT_U32: 323 bits = 32; 324 mul = 4; 325 break; 326 327 default: 328 abort(); 329 } 330 331 info->freq = as->freq; 332 info->bits = bits; 333 info->sign = sign; 334 info->nchannels = as->nchannels; 335 info->bytes_per_frame = as->nchannels * mul; 336 info->bytes_per_second = info->freq * info->bytes_per_frame; 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->bytes_per_frame); 348 } 349 else { 350 switch (info->bits) { 351 case 8: 352 memset(buf, 0x80, len * info->bytes_per_frame); 353 break; 354 355 case 16: 356 { 357 int i; 358 uint16_t *p = buf; 359 short s = INT16_MAX; 360 361 if (info->swap_endianness) { 362 s = bswap16 (s); 363 } 364 365 for (i = 0; i < len * info->nchannels; i++) { 366 p[i] = s; 367 } 368 } 369 break; 370 371 case 32: 372 { 373 int i; 374 uint32_t *p = buf; 375 int32_t s = INT32_MAX; 376 377 if (info->swap_endianness) { 378 s = bswap32 (s); 379 } 380 381 for (i = 0; i < len * info->nchannels; i++) { 382 p[i] = s; 383 } 384 } 385 break; 386 387 default: 388 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 389 info->bits); 390 break; 391 } 392 } 393 } 394 395 /* 396 * Capture 397 */ 398 static void noop_conv (struct st_sample *dst, const void *src, int samples) 399 { 400 (void) src; 401 (void) dst; 402 (void) samples; 403 } 404 405 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s, 406 struct audsettings *as) 407 { 408 CaptureVoiceOut *cap; 409 410 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 411 if (audio_pcm_info_eq (&cap->hw.info, as)) { 412 return cap; 413 } 414 } 415 return NULL; 416 } 417 418 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 419 { 420 struct capture_callback *cb; 421 422 #ifdef DEBUG_CAPTURE 423 dolog ("notification %d sent\n", cmd); 424 #endif 425 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 426 cb->ops.notify (cb->opaque, cmd); 427 } 428 } 429 430 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 431 { 432 if (cap->hw.enabled != enabled) { 433 audcnotification_e cmd; 434 cap->hw.enabled = enabled; 435 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 436 audio_notify_capture (cap, cmd); 437 } 438 } 439 440 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 441 { 442 HWVoiceOut *hw = &cap->hw; 443 SWVoiceOut *sw; 444 int enabled = 0; 445 446 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 447 if (sw->active) { 448 enabled = 1; 449 break; 450 } 451 } 452 audio_capture_maybe_changed (cap, enabled); 453 } 454 455 static void audio_detach_capture (HWVoiceOut *hw) 456 { 457 SWVoiceCap *sc = hw->cap_head.lh_first; 458 459 while (sc) { 460 SWVoiceCap *sc1 = sc->entries.le_next; 461 SWVoiceOut *sw = &sc->sw; 462 CaptureVoiceOut *cap = sc->cap; 463 int was_active = sw->active; 464 465 if (sw->rate) { 466 st_rate_stop (sw->rate); 467 sw->rate = NULL; 468 } 469 470 QLIST_REMOVE (sw, entries); 471 QLIST_REMOVE (sc, entries); 472 g_free (sc); 473 if (was_active) { 474 /* We have removed soft voice from the capture: 475 this might have changed the overall status of the capture 476 since this might have been the only active voice */ 477 audio_recalc_and_notify_capture (cap); 478 } 479 sc = sc1; 480 } 481 } 482 483 static int audio_attach_capture (HWVoiceOut *hw) 484 { 485 AudioState *s = hw->s; 486 CaptureVoiceOut *cap; 487 488 audio_detach_capture (hw); 489 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 490 SWVoiceCap *sc; 491 SWVoiceOut *sw; 492 HWVoiceOut *hw_cap = &cap->hw; 493 494 sc = g_malloc0(sizeof(*sc)); 495 496 sc->cap = cap; 497 sw = &sc->sw; 498 sw->hw = hw_cap; 499 sw->info = hw->info; 500 sw->empty = 1; 501 sw->active = hw->enabled; 502 sw->conv = noop_conv; 503 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 504 sw->vol = nominal_volume; 505 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 506 if (!sw->rate) { 507 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 508 g_free (sw); 509 return -1; 510 } 511 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 512 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 513 #ifdef DEBUG_CAPTURE 514 sw->name = g_strdup_printf ("for %p %d,%d,%d", 515 hw, sw->info.freq, sw->info.bits, 516 sw->info.nchannels); 517 dolog ("Added %s active = %d\n", sw->name, sw->active); 518 #endif 519 if (sw->active) { 520 audio_capture_maybe_changed (cap, 1); 521 } 522 } 523 return 0; 524 } 525 526 /* 527 * Hard voice (capture) 528 */ 529 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw) 530 { 531 SWVoiceIn *sw; 532 size_t m = hw->total_samples_captured; 533 534 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 535 if (sw->active) { 536 m = MIN (m, sw->total_hw_samples_acquired); 537 } 538 } 539 return m; 540 } 541 542 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw) 543 { 544 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 545 if (audio_bug(__func__, live > hw->conv_buf->size)) { 546 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 547 return 0; 548 } 549 return live; 550 } 551 552 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len) 553 { 554 size_t clipped = 0; 555 size_t pos = hw->mix_buf->pos; 556 557 while (len) { 558 st_sample *src = hw->mix_buf->samples + pos; 559 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame); 560 size_t samples_till_end_of_buf = hw->mix_buf->size - pos; 561 size_t samples_to_clip = MIN(len, samples_till_end_of_buf); 562 563 hw->clip(dst, src, samples_to_clip); 564 565 pos = (pos + samples_to_clip) % hw->mix_buf->size; 566 len -= samples_to_clip; 567 clipped += samples_to_clip; 568 } 569 } 570 571 /* 572 * Soft voice (capture) 573 */ 574 static size_t audio_pcm_sw_get_rpos_in(SWVoiceIn *sw) 575 { 576 HWVoiceIn *hw = sw->hw; 577 ssize_t live = hw->total_samples_captured - sw->total_hw_samples_acquired; 578 ssize_t rpos; 579 580 if (audio_bug(__func__, live < 0 || live > hw->conv_buf->size)) { 581 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 582 return 0; 583 } 584 585 rpos = hw->conv_buf->pos - live; 586 if (rpos >= 0) { 587 return rpos; 588 } 589 else { 590 return hw->conv_buf->size + rpos; 591 } 592 } 593 594 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size) 595 { 596 HWVoiceIn *hw = sw->hw; 597 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 598 struct st_sample *src, *dst = sw->buf; 599 600 rpos = audio_pcm_sw_get_rpos_in(sw) % hw->conv_buf->size; 601 602 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 603 if (audio_bug(__func__, live > hw->conv_buf->size)) { 604 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 605 return 0; 606 } 607 608 samples = size / sw->info.bytes_per_frame; 609 if (!live) { 610 return 0; 611 } 612 613 swlim = (live * sw->ratio) >> 32; 614 swlim = MIN (swlim, samples); 615 616 while (swlim) { 617 src = hw->conv_buf->samples + rpos; 618 if (hw->conv_buf->pos > rpos) { 619 isamp = hw->conv_buf->pos - rpos; 620 } else { 621 isamp = hw->conv_buf->size - rpos; 622 } 623 624 if (!isamp) { 625 break; 626 } 627 osamp = swlim; 628 629 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 630 swlim -= osamp; 631 rpos = (rpos + isamp) % hw->conv_buf->size; 632 dst += osamp; 633 ret += osamp; 634 total += isamp; 635 } 636 637 if (!hw->pcm_ops->volume_in) { 638 mixeng_volume (sw->buf, ret, &sw->vol); 639 } 640 641 sw->clip (buf, sw->buf, ret); 642 sw->total_hw_samples_acquired += total; 643 return ret * sw->info.bytes_per_frame; 644 } 645 646 /* 647 * Hard voice (playback) 648 */ 649 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 650 { 651 SWVoiceOut *sw; 652 size_t m = SIZE_MAX; 653 int nb_live = 0; 654 655 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 656 if (sw->active || !sw->empty) { 657 m = MIN (m, sw->total_hw_samples_mixed); 658 nb_live += 1; 659 } 660 } 661 662 *nb_livep = nb_live; 663 return m; 664 } 665 666 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 667 { 668 size_t smin; 669 int nb_live1; 670 671 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 672 if (nb_live) { 673 *nb_live = nb_live1; 674 } 675 676 if (nb_live1) { 677 size_t live = smin; 678 679 if (audio_bug(__func__, live > hw->mix_buf->size)) { 680 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 681 return 0; 682 } 683 return live; 684 } 685 return 0; 686 } 687 688 /* 689 * Soft voice (playback) 690 */ 691 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size) 692 { 693 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 694 size_t ret = 0, pos = 0, total = 0; 695 696 if (!sw) { 697 return size; 698 } 699 700 hwsamples = sw->hw->mix_buf->size; 701 702 live = sw->total_hw_samples_mixed; 703 if (audio_bug(__func__, live > hwsamples)) { 704 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples); 705 return 0; 706 } 707 708 if (live == hwsamples) { 709 #ifdef DEBUG_OUT 710 dolog ("%s is full %d\n", sw->name, live); 711 #endif 712 return 0; 713 } 714 715 wpos = (sw->hw->mix_buf->pos + live) % hwsamples; 716 samples = size / sw->info.bytes_per_frame; 717 718 dead = hwsamples - live; 719 swlim = ((int64_t) dead << 32) / sw->ratio; 720 swlim = MIN (swlim, samples); 721 if (swlim) { 722 sw->conv (sw->buf, buf, swlim); 723 724 if (!sw->hw->pcm_ops->volume_out) { 725 mixeng_volume (sw->buf, swlim, &sw->vol); 726 } 727 } 728 729 while (swlim) { 730 dead = hwsamples - live; 731 left = hwsamples - wpos; 732 blck = MIN (dead, left); 733 if (!blck) { 734 break; 735 } 736 isamp = swlim; 737 osamp = blck; 738 st_rate_flow_mix ( 739 sw->rate, 740 sw->buf + pos, 741 sw->hw->mix_buf->samples + wpos, 742 &isamp, 743 &osamp 744 ); 745 ret += isamp; 746 swlim -= isamp; 747 pos += isamp; 748 live += osamp; 749 wpos = (wpos + osamp) % hwsamples; 750 total += osamp; 751 } 752 753 sw->total_hw_samples_mixed += total; 754 sw->empty = sw->total_hw_samples_mixed == 0; 755 756 #ifdef DEBUG_OUT 757 dolog ( 758 "%s: write size %zu ret %zu total sw %zu\n", 759 SW_NAME (sw), 760 size / sw->info.bytes_per_frame, 761 ret, 762 sw->total_hw_samples_mixed 763 ); 764 #endif 765 766 return ret * sw->info.bytes_per_frame; 767 } 768 769 #ifdef DEBUG_AUDIO 770 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 771 { 772 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n", 773 cap, info->bits, info->sign, info->freq, info->nchannels); 774 } 775 #endif 776 777 #define DAC 778 #include "audio_template.h" 779 #undef DAC 780 #include "audio_template.h" 781 782 /* 783 * Timer 784 */ 785 static int audio_is_timer_needed(AudioState *s) 786 { 787 HWVoiceIn *hwi = NULL; 788 HWVoiceOut *hwo = NULL; 789 790 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 791 if (!hwo->poll_mode) return 1; 792 } 793 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 794 if (!hwi->poll_mode) return 1; 795 } 796 return 0; 797 } 798 799 static void audio_reset_timer (AudioState *s) 800 { 801 if (audio_is_timer_needed(s)) { 802 timer_mod_anticipate_ns(s->ts, 803 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 804 if (!s->timer_running) { 805 s->timer_running = true; 806 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 807 trace_audio_timer_start(s->period_ticks / SCALE_MS); 808 } 809 } else { 810 timer_del(s->ts); 811 if (s->timer_running) { 812 s->timer_running = false; 813 trace_audio_timer_stop(); 814 } 815 } 816 } 817 818 static void audio_timer (void *opaque) 819 { 820 int64_t now, diff; 821 AudioState *s = opaque; 822 823 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 824 diff = now - s->timer_last; 825 if (diff > s->period_ticks * 3 / 2) { 826 trace_audio_timer_delayed(diff / SCALE_MS); 827 } 828 s->timer_last = now; 829 830 audio_run(s, "timer"); 831 audio_reset_timer(s); 832 } 833 834 /* 835 * Public API 836 */ 837 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size) 838 { 839 HWVoiceOut *hw; 840 841 if (!sw) { 842 /* XXX: Consider options */ 843 return size; 844 } 845 hw = sw->hw; 846 847 if (!hw->enabled) { 848 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 849 return 0; 850 } 851 852 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) { 853 return audio_pcm_sw_write(sw, buf, size); 854 } else { 855 return hw->pcm_ops->write(hw, buf, size); 856 } 857 } 858 859 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size) 860 { 861 HWVoiceIn *hw; 862 863 if (!sw) { 864 /* XXX: Consider options */ 865 return size; 866 } 867 hw = sw->hw; 868 869 if (!hw->enabled) { 870 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 871 return 0; 872 } 873 874 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) { 875 return audio_pcm_sw_read(sw, buf, size); 876 } else { 877 return hw->pcm_ops->read(hw, buf, size); 878 } 879 } 880 881 int AUD_get_buffer_size_out (SWVoiceOut *sw) 882 { 883 return sw->hw->mix_buf->size * sw->hw->info.bytes_per_frame; 884 } 885 886 void AUD_set_active_out (SWVoiceOut *sw, int on) 887 { 888 HWVoiceOut *hw; 889 890 if (!sw) { 891 return; 892 } 893 894 hw = sw->hw; 895 if (sw->active != on) { 896 AudioState *s = sw->s; 897 SWVoiceOut *temp_sw; 898 SWVoiceCap *sc; 899 900 if (on) { 901 hw->pending_disable = 0; 902 if (!hw->enabled) { 903 hw->enabled = 1; 904 if (s->vm_running) { 905 if (hw->pcm_ops->enable_out) { 906 hw->pcm_ops->enable_out(hw, true); 907 } 908 audio_reset_timer (s); 909 } 910 } 911 } 912 else { 913 if (hw->enabled) { 914 int nb_active = 0; 915 916 for (temp_sw = hw->sw_head.lh_first; temp_sw; 917 temp_sw = temp_sw->entries.le_next) { 918 nb_active += temp_sw->active != 0; 919 } 920 921 hw->pending_disable = nb_active == 1; 922 } 923 } 924 925 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 926 sc->sw.active = hw->enabled; 927 if (hw->enabled) { 928 audio_capture_maybe_changed (sc->cap, 1); 929 } 930 } 931 sw->active = on; 932 } 933 } 934 935 void AUD_set_active_in (SWVoiceIn *sw, int on) 936 { 937 HWVoiceIn *hw; 938 939 if (!sw) { 940 return; 941 } 942 943 hw = sw->hw; 944 if (sw->active != on) { 945 AudioState *s = sw->s; 946 SWVoiceIn *temp_sw; 947 948 if (on) { 949 if (!hw->enabled) { 950 hw->enabled = 1; 951 if (s->vm_running) { 952 if (hw->pcm_ops->enable_in) { 953 hw->pcm_ops->enable_in(hw, true); 954 } 955 audio_reset_timer (s); 956 } 957 } 958 sw->total_hw_samples_acquired = hw->total_samples_captured; 959 } 960 else { 961 if (hw->enabled) { 962 int nb_active = 0; 963 964 for (temp_sw = hw->sw_head.lh_first; temp_sw; 965 temp_sw = temp_sw->entries.le_next) { 966 nb_active += temp_sw->active != 0; 967 } 968 969 if (nb_active == 1) { 970 hw->enabled = 0; 971 if (hw->pcm_ops->enable_in) { 972 hw->pcm_ops->enable_in(hw, false); 973 } 974 } 975 } 976 } 977 sw->active = on; 978 } 979 } 980 981 static size_t audio_get_avail (SWVoiceIn *sw) 982 { 983 size_t live; 984 985 if (!sw) { 986 return 0; 987 } 988 989 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 990 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) { 991 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live, 992 sw->hw->conv_buf->size); 993 return 0; 994 } 995 996 ldebug ( 997 "%s: get_avail live %d ret %" PRId64 "\n", 998 SW_NAME (sw), 999 live, (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame 1000 ); 1001 1002 return (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame; 1003 } 1004 1005 static size_t audio_get_free(SWVoiceOut *sw) 1006 { 1007 size_t live, dead; 1008 1009 if (!sw) { 1010 return 0; 1011 } 1012 1013 live = sw->total_hw_samples_mixed; 1014 1015 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) { 1016 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live, 1017 sw->hw->mix_buf->size); 1018 return 0; 1019 } 1020 1021 dead = sw->hw->mix_buf->size - live; 1022 1023 #ifdef DEBUG_OUT 1024 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1025 SW_NAME (sw), 1026 live, dead, (((int64_t) dead << 32) / sw->ratio) * 1027 sw->info.bytes_per_frame); 1028 #endif 1029 1030 return (((int64_t) dead << 32) / sw->ratio) * sw->info.bytes_per_frame; 1031 } 1032 1033 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos, 1034 size_t samples) 1035 { 1036 size_t n; 1037 1038 if (hw->enabled) { 1039 SWVoiceCap *sc; 1040 1041 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1042 SWVoiceOut *sw = &sc->sw; 1043 int rpos2 = rpos; 1044 1045 n = samples; 1046 while (n) { 1047 size_t till_end_of_hw = hw->mix_buf->size - rpos2; 1048 size_t to_write = MIN(till_end_of_hw, n); 1049 size_t bytes = to_write * hw->info.bytes_per_frame; 1050 size_t written; 1051 1052 sw->buf = hw->mix_buf->samples + rpos2; 1053 written = audio_pcm_sw_write (sw, NULL, bytes); 1054 if (written - bytes) { 1055 dolog("Could not mix %zu bytes into a capture " 1056 "buffer, mixed %zu\n", 1057 bytes, written); 1058 break; 1059 } 1060 n -= to_write; 1061 rpos2 = (rpos2 + to_write) % hw->mix_buf->size; 1062 } 1063 } 1064 } 1065 1066 n = MIN(samples, hw->mix_buf->size - rpos); 1067 mixeng_clear(hw->mix_buf->samples + rpos, n); 1068 mixeng_clear(hw->mix_buf->samples, samples - n); 1069 } 1070 1071 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live) 1072 { 1073 size_t clipped = 0; 1074 1075 while (live) { 1076 size_t size, decr, proc; 1077 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1078 if (!buf) { 1079 /* retrying will likely won't help, drop everything. */ 1080 hw->mix_buf->pos = (hw->mix_buf->pos + live) % hw->mix_buf->size; 1081 return clipped + live; 1082 } 1083 1084 decr = MIN(size / hw->info.bytes_per_frame, live); 1085 audio_pcm_hw_clip_out(hw, buf, decr); 1086 proc = hw->pcm_ops->put_buffer_out(hw, buf, 1087 decr * hw->info.bytes_per_frame) / 1088 hw->info.bytes_per_frame; 1089 1090 live -= proc; 1091 clipped += proc; 1092 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size; 1093 1094 if (proc == 0 || proc < decr) { 1095 break; 1096 } 1097 } 1098 1099 return clipped; 1100 } 1101 1102 static void audio_run_out (AudioState *s) 1103 { 1104 HWVoiceOut *hw = NULL; 1105 SWVoiceOut *sw; 1106 1107 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1108 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1109 /* there is exactly 1 sw for each hw with no mixeng */ 1110 sw = hw->sw_head.lh_first; 1111 1112 if (hw->pending_disable) { 1113 hw->enabled = 0; 1114 hw->pending_disable = 0; 1115 if (hw->pcm_ops->enable_out) { 1116 hw->pcm_ops->enable_out(hw, false); 1117 } 1118 } 1119 1120 if (sw->active) { 1121 sw->callback.fn(sw->callback.opaque, INT_MAX); 1122 } 1123 } 1124 return; 1125 } 1126 1127 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1128 size_t played, live, prev_rpos, free; 1129 int nb_live, cleanup_required; 1130 1131 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1132 if (!nb_live) { 1133 live = 0; 1134 } 1135 1136 if (audio_bug(__func__, live > hw->mix_buf->size)) { 1137 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 1138 continue; 1139 } 1140 1141 if (hw->pending_disable && !nb_live) { 1142 SWVoiceCap *sc; 1143 #ifdef DEBUG_OUT 1144 dolog ("Disabling voice\n"); 1145 #endif 1146 hw->enabled = 0; 1147 hw->pending_disable = 0; 1148 if (hw->pcm_ops->enable_out) { 1149 hw->pcm_ops->enable_out(hw, false); 1150 } 1151 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1152 sc->sw.active = 0; 1153 audio_recalc_and_notify_capture (sc->cap); 1154 } 1155 continue; 1156 } 1157 1158 if (!live) { 1159 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1160 if (sw->active) { 1161 free = audio_get_free (sw); 1162 if (free > 0) { 1163 sw->callback.fn (sw->callback.opaque, free); 1164 } 1165 } 1166 } 1167 continue; 1168 } 1169 1170 prev_rpos = hw->mix_buf->pos; 1171 played = audio_pcm_hw_run_out(hw, live); 1172 replay_audio_out(&played); 1173 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) { 1174 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n", 1175 hw->mix_buf->pos, hw->mix_buf->size, played); 1176 hw->mix_buf->pos = 0; 1177 } 1178 1179 #ifdef DEBUG_OUT 1180 dolog("played=%zu\n", played); 1181 #endif 1182 1183 if (played) { 1184 hw->ts_helper += played; 1185 audio_capture_mix_and_clear (hw, prev_rpos, played); 1186 } 1187 1188 cleanup_required = 0; 1189 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1190 if (!sw->active && sw->empty) { 1191 continue; 1192 } 1193 1194 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1195 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1196 played, sw->total_hw_samples_mixed); 1197 played = sw->total_hw_samples_mixed; 1198 } 1199 1200 sw->total_hw_samples_mixed -= played; 1201 1202 if (!sw->total_hw_samples_mixed) { 1203 sw->empty = 1; 1204 cleanup_required |= !sw->active && !sw->callback.fn; 1205 } 1206 1207 if (sw->active) { 1208 free = audio_get_free (sw); 1209 if (free > 0) { 1210 sw->callback.fn (sw->callback.opaque, free); 1211 } 1212 } 1213 } 1214 1215 if (cleanup_required) { 1216 SWVoiceOut *sw1; 1217 1218 sw = hw->sw_head.lh_first; 1219 while (sw) { 1220 sw1 = sw->entries.le_next; 1221 if (!sw->active && !sw->callback.fn) { 1222 audio_close_out (sw); 1223 } 1224 sw = sw1; 1225 } 1226 } 1227 } 1228 } 1229 1230 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1231 { 1232 size_t conv = 0; 1233 STSampleBuffer *conv_buf = hw->conv_buf; 1234 1235 while (samples) { 1236 size_t proc; 1237 size_t size = samples * hw->info.bytes_per_frame; 1238 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1239 1240 assert(size % hw->info.bytes_per_frame == 0); 1241 if (size == 0) { 1242 hw->pcm_ops->put_buffer_in(hw, buf, size); 1243 break; 1244 } 1245 1246 proc = MIN(size / hw->info.bytes_per_frame, 1247 conv_buf->size - conv_buf->pos); 1248 1249 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc); 1250 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 1251 1252 samples -= proc; 1253 conv += proc; 1254 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame); 1255 } 1256 1257 return conv; 1258 } 1259 1260 static void audio_run_in (AudioState *s) 1261 { 1262 HWVoiceIn *hw = NULL; 1263 1264 if (!audio_get_pdo_in(s->dev)->mixing_engine) { 1265 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1266 /* there is exactly 1 sw for each hw with no mixeng */ 1267 SWVoiceIn *sw = hw->sw_head.lh_first; 1268 if (sw->active) { 1269 sw->callback.fn(sw->callback.opaque, INT_MAX); 1270 } 1271 } 1272 return; 1273 } 1274 1275 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1276 SWVoiceIn *sw; 1277 size_t captured = 0, min; 1278 1279 if (replay_mode != REPLAY_MODE_PLAY) { 1280 captured = audio_pcm_hw_run_in( 1281 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw)); 1282 } 1283 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos, 1284 hw->conv_buf->size); 1285 1286 min = audio_pcm_hw_find_min_in (hw); 1287 hw->total_samples_captured += captured - min; 1288 hw->ts_helper += captured; 1289 1290 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1291 sw->total_hw_samples_acquired -= min; 1292 1293 if (sw->active) { 1294 size_t avail; 1295 1296 avail = audio_get_avail (sw); 1297 if (avail > 0) { 1298 sw->callback.fn (sw->callback.opaque, avail); 1299 } 1300 } 1301 } 1302 } 1303 } 1304 1305 static void audio_run_capture (AudioState *s) 1306 { 1307 CaptureVoiceOut *cap; 1308 1309 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1310 size_t live, rpos, captured; 1311 HWVoiceOut *hw = &cap->hw; 1312 SWVoiceOut *sw; 1313 1314 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1315 rpos = hw->mix_buf->pos; 1316 while (live) { 1317 size_t left = hw->mix_buf->size - rpos; 1318 size_t to_capture = MIN(live, left); 1319 struct st_sample *src; 1320 struct capture_callback *cb; 1321 1322 src = hw->mix_buf->samples + rpos; 1323 hw->clip (cap->buf, src, to_capture); 1324 mixeng_clear (src, to_capture); 1325 1326 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1327 cb->ops.capture (cb->opaque, cap->buf, 1328 to_capture * hw->info.bytes_per_frame); 1329 } 1330 rpos = (rpos + to_capture) % hw->mix_buf->size; 1331 live -= to_capture; 1332 } 1333 hw->mix_buf->pos = rpos; 1334 1335 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1336 if (!sw->active && sw->empty) { 1337 continue; 1338 } 1339 1340 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1341 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1342 captured, sw->total_hw_samples_mixed); 1343 captured = sw->total_hw_samples_mixed; 1344 } 1345 1346 sw->total_hw_samples_mixed -= captured; 1347 sw->empty = sw->total_hw_samples_mixed == 0; 1348 } 1349 } 1350 } 1351 1352 void audio_run(AudioState *s, const char *msg) 1353 { 1354 audio_run_out(s); 1355 audio_run_in(s); 1356 audio_run_capture(s); 1357 1358 #ifdef DEBUG_POLL 1359 { 1360 static double prevtime; 1361 double currtime; 1362 struct timeval tv; 1363 1364 if (gettimeofday (&tv, NULL)) { 1365 perror ("audio_run: gettimeofday"); 1366 return; 1367 } 1368 1369 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1370 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1371 prevtime = currtime; 1372 } 1373 #endif 1374 } 1375 1376 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1377 { 1378 ssize_t start; 1379 1380 if (unlikely(!hw->buf_emul)) { 1381 size_t calc_size = hw->conv_buf->size * hw->info.bytes_per_frame; 1382 hw->buf_emul = g_malloc(calc_size); 1383 hw->size_emul = calc_size; 1384 hw->pos_emul = hw->pending_emul = 0; 1385 } 1386 1387 while (hw->pending_emul < hw->size_emul) { 1388 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1389 hw->size_emul - hw->pending_emul); 1390 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1391 read_len); 1392 hw->pending_emul += read; 1393 if (read < read_len) { 1394 break; 1395 } 1396 } 1397 1398 start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1399 if (start < 0) { 1400 start += hw->size_emul; 1401 } 1402 assert(start >= 0 && start < hw->size_emul); 1403 1404 *size = MIN(hw->pending_emul, hw->size_emul - start); 1405 return hw->buf_emul + start; 1406 } 1407 1408 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1409 { 1410 assert(size <= hw->pending_emul); 1411 hw->pending_emul -= size; 1412 } 1413 1414 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1415 { 1416 if (unlikely(!hw->buf_emul)) { 1417 size_t calc_size = hw->mix_buf->size * hw->info.bytes_per_frame; 1418 1419 hw->buf_emul = g_malloc(calc_size); 1420 hw->size_emul = calc_size; 1421 hw->pos_emul = hw->pending_emul = 0; 1422 } 1423 1424 *size = MIN(hw->size_emul - hw->pending_emul, 1425 hw->size_emul - hw->pos_emul); 1426 return hw->buf_emul + hw->pos_emul; 1427 } 1428 1429 size_t audio_generic_put_buffer_out_nowrite(HWVoiceOut *hw, void *buf, 1430 size_t size) 1431 { 1432 assert(buf == hw->buf_emul + hw->pos_emul && 1433 size + hw->pending_emul <= hw->size_emul); 1434 1435 hw->pending_emul += size; 1436 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1437 1438 return size; 1439 } 1440 1441 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1442 { 1443 audio_generic_put_buffer_out_nowrite(hw, buf, size); 1444 1445 while (hw->pending_emul) { 1446 size_t write_len, written; 1447 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1448 if (start < 0) { 1449 start += hw->size_emul; 1450 } 1451 assert(start >= 0 && start < hw->size_emul); 1452 1453 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1454 1455 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1456 hw->pending_emul -= written; 1457 1458 if (written < write_len) { 1459 break; 1460 } 1461 } 1462 1463 /* 1464 * fake we have written everything. non-written data remain in pending_emul, 1465 * so we do not have to clip them multiple times 1466 */ 1467 return size; 1468 } 1469 1470 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1471 { 1472 size_t dst_size, copy_size; 1473 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1474 copy_size = MIN(size, dst_size); 1475 1476 memcpy(dst, buf, copy_size); 1477 return hw->pcm_ops->put_buffer_out(hw, buf, copy_size); 1478 } 1479 1480 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1481 { 1482 size_t dst_size, copy_size; 1483 void *dst = hw->pcm_ops->get_buffer_in(hw, &dst_size); 1484 copy_size = MIN(size, dst_size); 1485 1486 memcpy(dst, buf, copy_size); 1487 hw->pcm_ops->put_buffer_in(hw, buf, copy_size); 1488 return copy_size; 1489 } 1490 1491 1492 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1493 bool msg, Audiodev *dev) 1494 { 1495 s->drv_opaque = drv->init(dev); 1496 1497 if (s->drv_opaque) { 1498 if (!drv->pcm_ops->get_buffer_in) { 1499 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1500 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1501 } 1502 if (!drv->pcm_ops->get_buffer_out) { 1503 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1504 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1505 } 1506 1507 audio_init_nb_voices_out(s, drv); 1508 audio_init_nb_voices_in(s, drv); 1509 s->drv = drv; 1510 return 0; 1511 } 1512 else { 1513 if (msg) { 1514 dolog("Could not init `%s' audio driver\n", drv->name); 1515 } 1516 return -1; 1517 } 1518 } 1519 1520 static void audio_vm_change_state_handler (void *opaque, int running, 1521 RunState state) 1522 { 1523 AudioState *s = opaque; 1524 HWVoiceOut *hwo = NULL; 1525 HWVoiceIn *hwi = NULL; 1526 1527 s->vm_running = running; 1528 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1529 if (hwo->pcm_ops->enable_out) { 1530 hwo->pcm_ops->enable_out(hwo, running); 1531 } 1532 } 1533 1534 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1535 if (hwi->pcm_ops->enable_in) { 1536 hwi->pcm_ops->enable_in(hwi, running); 1537 } 1538 } 1539 audio_reset_timer (s); 1540 } 1541 1542 static bool is_cleaning_up; 1543 1544 bool audio_is_cleaning_up(void) 1545 { 1546 return is_cleaning_up; 1547 } 1548 1549 static void free_audio_state(AudioState *s) 1550 { 1551 HWVoiceOut *hwo, *hwon; 1552 HWVoiceIn *hwi, *hwin; 1553 1554 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1555 SWVoiceCap *sc; 1556 1557 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1558 hwo->pcm_ops->enable_out(hwo, false); 1559 } 1560 hwo->pcm_ops->fini_out (hwo); 1561 1562 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1563 CaptureVoiceOut *cap = sc->cap; 1564 struct capture_callback *cb; 1565 1566 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1567 cb->ops.destroy (cb->opaque); 1568 } 1569 } 1570 QLIST_REMOVE(hwo, entries); 1571 } 1572 1573 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1574 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1575 hwi->pcm_ops->enable_in(hwi, false); 1576 } 1577 hwi->pcm_ops->fini_in (hwi); 1578 QLIST_REMOVE(hwi, entries); 1579 } 1580 1581 if (s->drv) { 1582 s->drv->fini (s->drv_opaque); 1583 s->drv = NULL; 1584 } 1585 1586 if (s->dev) { 1587 qapi_free_Audiodev(s->dev); 1588 s->dev = NULL; 1589 } 1590 1591 if (s->ts) { 1592 timer_free(s->ts); 1593 s->ts = NULL; 1594 } 1595 1596 g_free(s); 1597 } 1598 1599 void audio_cleanup(void) 1600 { 1601 is_cleaning_up = true; 1602 while (!QTAILQ_EMPTY(&audio_states)) { 1603 AudioState *s = QTAILQ_FIRST(&audio_states); 1604 QTAILQ_REMOVE(&audio_states, s, list); 1605 free_audio_state(s); 1606 } 1607 } 1608 1609 static const VMStateDescription vmstate_audio = { 1610 .name = "audio", 1611 .version_id = 1, 1612 .minimum_version_id = 1, 1613 .fields = (VMStateField[]) { 1614 VMSTATE_END_OF_LIST() 1615 } 1616 }; 1617 1618 static void audio_validate_opts(Audiodev *dev, Error **errp); 1619 1620 static AudiodevListEntry *audiodev_find( 1621 AudiodevListHead *head, const char *drvname) 1622 { 1623 AudiodevListEntry *e; 1624 QSIMPLEQ_FOREACH(e, head, next) { 1625 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1626 return e; 1627 } 1628 } 1629 1630 return NULL; 1631 } 1632 1633 /* 1634 * if we have dev, this function was called because of an -audiodev argument => 1635 * initialize a new state with it 1636 * if dev == NULL => legacy implicit initialization, return the already created 1637 * state or create a new one 1638 */ 1639 static AudioState *audio_init(Audiodev *dev, const char *name) 1640 { 1641 static bool atexit_registered; 1642 size_t i; 1643 int done = 0; 1644 const char *drvname = NULL; 1645 VMChangeStateEntry *e; 1646 AudioState *s; 1647 struct audio_driver *driver; 1648 /* silence gcc warning about uninitialized variable */ 1649 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1650 1651 if (dev) { 1652 /* -audiodev option */ 1653 legacy_config = false; 1654 drvname = AudiodevDriver_str(dev->driver); 1655 } else if (!QTAILQ_EMPTY(&audio_states)) { 1656 if (!legacy_config) { 1657 dolog("Device %s: audiodev default parameter is deprecated, please " 1658 "specify audiodev=%s\n", name, 1659 QTAILQ_FIRST(&audio_states)->dev->id); 1660 } 1661 return QTAILQ_FIRST(&audio_states); 1662 } else { 1663 /* legacy implicit initialization */ 1664 head = audio_handle_legacy_opts(); 1665 /* 1666 * In case of legacy initialization, all Audiodevs in the list will have 1667 * the same configuration (except the driver), so it does't matter which 1668 * one we chose. We need an Audiodev to set up AudioState before we can 1669 * init a driver. Also note that dev at this point is still in the 1670 * list. 1671 */ 1672 dev = QSIMPLEQ_FIRST(&head)->dev; 1673 audio_validate_opts(dev, &error_abort); 1674 } 1675 1676 s = g_malloc0(sizeof(AudioState)); 1677 s->dev = dev; 1678 1679 QLIST_INIT (&s->hw_head_out); 1680 QLIST_INIT (&s->hw_head_in); 1681 QLIST_INIT (&s->cap_head); 1682 if (!atexit_registered) { 1683 atexit(audio_cleanup); 1684 atexit_registered = true; 1685 } 1686 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1687 1688 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1689 1690 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1691 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1692 1693 if (s->nb_hw_voices_out <= 0) { 1694 dolog ("Bogus number of playback voices %d, setting to 1\n", 1695 s->nb_hw_voices_out); 1696 s->nb_hw_voices_out = 1; 1697 } 1698 1699 if (s->nb_hw_voices_in <= 0) { 1700 dolog ("Bogus number of capture voices %d, setting to 0\n", 1701 s->nb_hw_voices_in); 1702 s->nb_hw_voices_in = 0; 1703 } 1704 1705 if (drvname) { 1706 driver = audio_driver_lookup(drvname); 1707 if (driver) { 1708 done = !audio_driver_init(s, driver, true, dev); 1709 } else { 1710 dolog ("Unknown audio driver `%s'\n", drvname); 1711 } 1712 } else { 1713 for (i = 0; audio_prio_list[i]; i++) { 1714 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1715 driver = audio_driver_lookup(audio_prio_list[i]); 1716 1717 if (e && driver) { 1718 s->dev = dev = e->dev; 1719 audio_validate_opts(dev, &error_abort); 1720 done = !audio_driver_init(s, driver, false, dev); 1721 if (done) { 1722 e->dev = NULL; 1723 break; 1724 } 1725 } 1726 } 1727 } 1728 audio_free_audiodev_list(&head); 1729 1730 if (!done) { 1731 driver = audio_driver_lookup("none"); 1732 done = !audio_driver_init(s, driver, false, dev); 1733 assert(done); 1734 dolog("warning: Using timer based audio emulation\n"); 1735 } 1736 1737 if (dev->timer_period <= 0) { 1738 s->period_ticks = 1; 1739 } else { 1740 s->period_ticks = dev->timer_period * SCALE_US; 1741 } 1742 1743 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1744 if (!e) { 1745 dolog ("warning: Could not register change state handler\n" 1746 "(Audio can continue looping even after stopping the VM)\n"); 1747 } 1748 1749 QLIST_INIT (&s->card_head); 1750 vmstate_register (NULL, 0, &vmstate_audio, s); 1751 return s; 1752 } 1753 1754 void audio_free_audiodev_list(AudiodevListHead *head) 1755 { 1756 AudiodevListEntry *e; 1757 while ((e = QSIMPLEQ_FIRST(head))) { 1758 QSIMPLEQ_REMOVE_HEAD(head, next); 1759 qapi_free_Audiodev(e->dev); 1760 g_free(e); 1761 } 1762 } 1763 1764 void AUD_register_card (const char *name, QEMUSoundCard *card) 1765 { 1766 if (!card->state) { 1767 card->state = audio_init(NULL, name); 1768 } 1769 1770 card->name = g_strdup (name); 1771 memset (&card->entries, 0, sizeof (card->entries)); 1772 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1773 } 1774 1775 void AUD_remove_card (QEMUSoundCard *card) 1776 { 1777 QLIST_REMOVE (card, entries); 1778 g_free (card->name); 1779 } 1780 1781 1782 CaptureVoiceOut *AUD_add_capture( 1783 AudioState *s, 1784 struct audsettings *as, 1785 struct audio_capture_ops *ops, 1786 void *cb_opaque 1787 ) 1788 { 1789 CaptureVoiceOut *cap; 1790 struct capture_callback *cb; 1791 1792 if (!s) { 1793 if (!legacy_config) { 1794 dolog("Capturing without setting an audiodev is deprecated\n"); 1795 } 1796 s = audio_init(NULL, NULL); 1797 } 1798 1799 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1800 dolog("Can't capture with mixeng disabled\n"); 1801 return NULL; 1802 } 1803 1804 if (audio_validate_settings (as)) { 1805 dolog ("Invalid settings were passed when trying to add capture\n"); 1806 audio_print_settings (as); 1807 return NULL; 1808 } 1809 1810 cb = g_malloc0(sizeof(*cb)); 1811 cb->ops = *ops; 1812 cb->opaque = cb_opaque; 1813 1814 cap = audio_pcm_capture_find_specific(s, as); 1815 if (cap) { 1816 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1817 return cap; 1818 } 1819 else { 1820 HWVoiceOut *hw; 1821 CaptureVoiceOut *cap; 1822 1823 cap = g_malloc0(sizeof(*cap)); 1824 1825 hw = &cap->hw; 1826 hw->s = s; 1827 QLIST_INIT (&hw->sw_head); 1828 QLIST_INIT (&cap->cb_head); 1829 1830 /* XXX find a more elegant way */ 1831 hw->samples = 4096 * 4; 1832 audio_pcm_hw_alloc_resources_out(hw); 1833 1834 audio_pcm_init_info (&hw->info, as); 1835 1836 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame); 1837 1838 hw->clip = mixeng_clip 1839 [hw->info.nchannels == 2] 1840 [hw->info.sign] 1841 [hw->info.swap_endianness] 1842 [audio_bits_to_index (hw->info.bits)]; 1843 1844 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1845 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1846 1847 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1848 audio_attach_capture (hw); 1849 } 1850 return cap; 1851 } 1852 } 1853 1854 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1855 { 1856 struct capture_callback *cb; 1857 1858 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1859 if (cb->opaque == cb_opaque) { 1860 cb->ops.destroy (cb_opaque); 1861 QLIST_REMOVE (cb, entries); 1862 g_free (cb); 1863 1864 if (!cap->cb_head.lh_first) { 1865 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1866 1867 while (sw) { 1868 SWVoiceCap *sc = (SWVoiceCap *) sw; 1869 #ifdef DEBUG_CAPTURE 1870 dolog ("freeing %s\n", sw->name); 1871 #endif 1872 1873 sw1 = sw->entries.le_next; 1874 if (sw->rate) { 1875 st_rate_stop (sw->rate); 1876 sw->rate = NULL; 1877 } 1878 QLIST_REMOVE (sw, entries); 1879 QLIST_REMOVE (sc, entries); 1880 g_free (sc); 1881 sw = sw1; 1882 } 1883 QLIST_REMOVE (cap, entries); 1884 g_free (cap->hw.mix_buf); 1885 g_free (cap->buf); 1886 g_free (cap); 1887 } 1888 return; 1889 } 1890 } 1891 } 1892 1893 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1894 { 1895 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1896 audio_set_volume_out(sw, &vol); 1897 } 1898 1899 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol) 1900 { 1901 if (sw) { 1902 HWVoiceOut *hw = sw->hw; 1903 1904 sw->vol.mute = vol->mute; 1905 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1906 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] / 1907 255; 1908 1909 if (hw->pcm_ops->volume_out) { 1910 hw->pcm_ops->volume_out(hw, vol); 1911 } 1912 } 1913 } 1914 1915 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1916 { 1917 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1918 audio_set_volume_in(sw, &vol); 1919 } 1920 1921 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol) 1922 { 1923 if (sw) { 1924 HWVoiceIn *hw = sw->hw; 1925 1926 sw->vol.mute = vol->mute; 1927 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1928 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] / 1929 255; 1930 1931 if (hw->pcm_ops->volume_in) { 1932 hw->pcm_ops->volume_in(hw, vol); 1933 } 1934 } 1935 } 1936 1937 void audio_create_pdos(Audiodev *dev) 1938 { 1939 switch (dev->driver) { 1940 #define CASE(DRIVER, driver, pdo_name) \ 1941 case AUDIODEV_DRIVER_##DRIVER: \ 1942 if (!dev->u.driver.has_in) { \ 1943 dev->u.driver.in = g_malloc0( \ 1944 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1945 dev->u.driver.has_in = true; \ 1946 } \ 1947 if (!dev->u.driver.has_out) { \ 1948 dev->u.driver.out = g_malloc0( \ 1949 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1950 dev->u.driver.has_out = true; \ 1951 } \ 1952 break 1953 1954 CASE(NONE, none, ); 1955 CASE(ALSA, alsa, Alsa); 1956 CASE(COREAUDIO, coreaudio, Coreaudio); 1957 CASE(DSOUND, dsound, ); 1958 CASE(OSS, oss, Oss); 1959 CASE(PA, pa, Pa); 1960 CASE(SDL, sdl, ); 1961 CASE(SPICE, spice, ); 1962 CASE(WAV, wav, ); 1963 1964 case AUDIODEV_DRIVER__MAX: 1965 abort(); 1966 }; 1967 } 1968 1969 static void audio_validate_per_direction_opts( 1970 AudiodevPerDirectionOptions *pdo, Error **errp) 1971 { 1972 if (!pdo->has_mixing_engine) { 1973 pdo->has_mixing_engine = true; 1974 pdo->mixing_engine = true; 1975 } 1976 if (!pdo->has_fixed_settings) { 1977 pdo->has_fixed_settings = true; 1978 pdo->fixed_settings = pdo->mixing_engine; 1979 } 1980 if (!pdo->fixed_settings && 1981 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1982 error_setg(errp, 1983 "You can't use frequency, channels or format with fixed-settings=off"); 1984 return; 1985 } 1986 if (!pdo->mixing_engine && pdo->fixed_settings) { 1987 error_setg(errp, "You can't use fixed-settings without mixeng"); 1988 return; 1989 } 1990 1991 if (!pdo->has_frequency) { 1992 pdo->has_frequency = true; 1993 pdo->frequency = 44100; 1994 } 1995 if (!pdo->has_channels) { 1996 pdo->has_channels = true; 1997 pdo->channels = 2; 1998 } 1999 if (!pdo->has_voices) { 2000 pdo->has_voices = true; 2001 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX; 2002 } 2003 if (!pdo->has_format) { 2004 pdo->has_format = true; 2005 pdo->format = AUDIO_FORMAT_S16; 2006 } 2007 } 2008 2009 static void audio_validate_opts(Audiodev *dev, Error **errp) 2010 { 2011 Error *err = NULL; 2012 2013 audio_create_pdos(dev); 2014 2015 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 2016 if (err) { 2017 error_propagate(errp, err); 2018 return; 2019 } 2020 2021 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 2022 if (err) { 2023 error_propagate(errp, err); 2024 return; 2025 } 2026 2027 if (!dev->has_timer_period) { 2028 dev->has_timer_period = true; 2029 dev->timer_period = 10000; /* 100Hz -> 10ms */ 2030 } 2031 } 2032 2033 void audio_parse_option(const char *opt) 2034 { 2035 AudiodevListEntry *e; 2036 Audiodev *dev = NULL; 2037 2038 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 2039 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 2040 visit_free(v); 2041 2042 audio_validate_opts(dev, &error_fatal); 2043 2044 e = g_malloc0(sizeof(AudiodevListEntry)); 2045 e->dev = dev; 2046 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 2047 } 2048 2049 void audio_init_audiodevs(void) 2050 { 2051 AudiodevListEntry *e; 2052 2053 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2054 audio_init(e->dev, NULL); 2055 } 2056 } 2057 2058 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 2059 { 2060 return (audsettings) { 2061 .freq = pdo->frequency, 2062 .nchannels = pdo->channels, 2063 .fmt = pdo->format, 2064 .endianness = AUDIO_HOST_ENDIANNESS, 2065 }; 2066 } 2067 2068 int audioformat_bytes_per_sample(AudioFormat fmt) 2069 { 2070 switch (fmt) { 2071 case AUDIO_FORMAT_U8: 2072 case AUDIO_FORMAT_S8: 2073 return 1; 2074 2075 case AUDIO_FORMAT_U16: 2076 case AUDIO_FORMAT_S16: 2077 return 2; 2078 2079 case AUDIO_FORMAT_U32: 2080 case AUDIO_FORMAT_S32: 2081 return 4; 2082 2083 case AUDIO_FORMAT__MAX: 2084 ; 2085 } 2086 abort(); 2087 } 2088 2089 2090 /* frames = freq * usec / 1e6 */ 2091 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2092 audsettings *as, int def_usecs) 2093 { 2094 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2095 return (as->freq * usecs + 500000) / 1000000; 2096 } 2097 2098 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2099 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2100 audsettings *as, int def_usecs) 2101 { 2102 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2103 } 2104 2105 /* 2106 * bytes = bytes_per_sample * samples = 2107 * bytes_per_sample * channels * freq * usec / 1e6 2108 */ 2109 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2110 audsettings *as, int def_usecs) 2111 { 2112 return audio_buffer_samples(pdo, as, def_usecs) * 2113 audioformat_bytes_per_sample(as->fmt); 2114 } 2115 2116 AudioState *audio_state_by_name(const char *name) 2117 { 2118 AudioState *s; 2119 QTAILQ_FOREACH(s, &audio_states, list) { 2120 assert(s->dev); 2121 if (strcmp(name, s->dev->id) == 0) { 2122 return s; 2123 } 2124 } 2125 return NULL; 2126 } 2127 2128 const char *audio_get_id(QEMUSoundCard *card) 2129 { 2130 if (card->state) { 2131 assert(card->state->dev); 2132 return card->state->dev->id; 2133 } else { 2134 return ""; 2135 } 2136 } 2137 2138 void audio_rate_start(RateCtl *rate) 2139 { 2140 memset(rate, 0, sizeof(RateCtl)); 2141 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2142 } 2143 2144 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, 2145 size_t bytes_avail) 2146 { 2147 int64_t now; 2148 int64_t ticks; 2149 int64_t bytes; 2150 int64_t samples; 2151 size_t ret; 2152 2153 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2154 ticks = now - rate->start_ticks; 2155 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2156 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame; 2157 if (samples < 0 || samples > 65536) { 2158 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples); 2159 audio_rate_start(rate); 2160 samples = 0; 2161 } 2162 2163 ret = MIN(samples * info->bytes_per_frame, bytes_avail); 2164 rate->bytes_sent += ret; 2165 return ret; 2166 } 2167