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 "hw/hw.h" 27 #include "audio.h" 28 #include "migration/vmstate.h" 29 #include "monitor/monitor.h" 30 #include "qemu/timer.h" 31 #include "qapi/error.h" 32 #include "qapi/qobject-input-visitor.h" 33 #include "qapi/qapi-visit-audio.h" 34 #include "sysemu/sysemu.h" 35 #include "qemu/cutils.h" 36 #include "qemu/module.h" 37 #include "sysemu/replay.h" 38 #include "trace.h" 39 40 #define AUDIO_CAP "audio" 41 #include "audio_int.h" 42 43 /* #define DEBUG_LIVE */ 44 /* #define DEBUG_OUT */ 45 /* #define DEBUG_CAPTURE */ 46 /* #define DEBUG_POLL */ 47 48 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 49 50 51 /* Order of CONFIG_AUDIO_DRIVERS is import. 52 The 1st one is the one used by default, that is the reason 53 that we generate the list. 54 */ 55 const char *audio_prio_list[] = { 56 "spice", 57 CONFIG_AUDIO_DRIVERS 58 "none", 59 "wav", 60 NULL 61 }; 62 63 static QLIST_HEAD(, audio_driver) audio_drivers; 64 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 65 66 void audio_driver_register(audio_driver *drv) 67 { 68 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 69 } 70 71 audio_driver *audio_driver_lookup(const char *name) 72 { 73 struct audio_driver *d; 74 75 QLIST_FOREACH(d, &audio_drivers, next) { 76 if (strcmp(name, d->name) == 0) { 77 return d; 78 } 79 } 80 81 audio_module_load_one(name); 82 QLIST_FOREACH(d, &audio_drivers, next) { 83 if (strcmp(name, d->name) == 0) { 84 return d; 85 } 86 } 87 88 return NULL; 89 } 90 91 static AudioState glob_audio_state; 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 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED 105 #error No its not 106 #else 107 int audio_bug (const char *funcname, int cond) 108 { 109 if (cond) { 110 static int shown; 111 112 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 113 if (!shown) { 114 shown = 1; 115 AUD_log (NULL, "Save all your work and restart without audio\n"); 116 AUD_log (NULL, "I am sorry\n"); 117 } 118 AUD_log (NULL, "Context:\n"); 119 120 #if defined AUDIO_BREAKPOINT_ON_BUG 121 # if defined HOST_I386 122 # if defined __GNUC__ 123 __asm__ ("int3"); 124 # elif defined _MSC_VER 125 _asm _emit 0xcc; 126 # else 127 abort (); 128 # endif 129 # else 130 abort (); 131 # endif 132 #endif 133 } 134 135 return cond; 136 } 137 #endif 138 139 static inline int audio_bits_to_index (int bits) 140 { 141 switch (bits) { 142 case 8: 143 return 0; 144 145 case 16: 146 return 1; 147 148 case 32: 149 return 2; 150 151 default: 152 audio_bug ("bits_to_index", 1); 153 AUD_log (NULL, "invalid bits %d\n", bits); 154 return 0; 155 } 156 } 157 158 void *audio_calloc (const char *funcname, int nmemb, size_t size) 159 { 160 int cond; 161 size_t len; 162 163 len = nmemb * size; 164 cond = !nmemb || !size; 165 cond |= nmemb < 0; 166 cond |= len < size; 167 168 if (audio_bug ("audio_calloc", cond)) { 169 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 170 funcname); 171 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 172 return NULL; 173 } 174 175 return g_malloc0 (len); 176 } 177 178 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 179 { 180 if (cap) { 181 fprintf(stderr, "%s: ", cap); 182 } 183 184 vfprintf(stderr, fmt, ap); 185 } 186 187 void AUD_log (const char *cap, const char *fmt, ...) 188 { 189 va_list ap; 190 191 va_start (ap, fmt); 192 AUD_vlog (cap, fmt, ap); 193 va_end (ap); 194 } 195 196 static void audio_print_settings (struct audsettings *as) 197 { 198 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 199 200 switch (as->fmt) { 201 case AUDIO_FORMAT_S8: 202 AUD_log (NULL, "S8"); 203 break; 204 case AUDIO_FORMAT_U8: 205 AUD_log (NULL, "U8"); 206 break; 207 case AUDIO_FORMAT_S16: 208 AUD_log (NULL, "S16"); 209 break; 210 case AUDIO_FORMAT_U16: 211 AUD_log (NULL, "U16"); 212 break; 213 case AUDIO_FORMAT_S32: 214 AUD_log (NULL, "S32"); 215 break; 216 case AUDIO_FORMAT_U32: 217 AUD_log (NULL, "U32"); 218 break; 219 default: 220 AUD_log (NULL, "invalid(%d)", as->fmt); 221 break; 222 } 223 224 AUD_log (NULL, " endianness="); 225 switch (as->endianness) { 226 case 0: 227 AUD_log (NULL, "little"); 228 break; 229 case 1: 230 AUD_log (NULL, "big"); 231 break; 232 default: 233 AUD_log (NULL, "invalid"); 234 break; 235 } 236 AUD_log (NULL, "\n"); 237 } 238 239 static int audio_validate_settings (struct audsettings *as) 240 { 241 int invalid; 242 243 invalid = as->nchannels != 1 && as->nchannels != 2; 244 invalid |= as->endianness != 0 && as->endianness != 1; 245 246 switch (as->fmt) { 247 case AUDIO_FORMAT_S8: 248 case AUDIO_FORMAT_U8: 249 case AUDIO_FORMAT_S16: 250 case AUDIO_FORMAT_U16: 251 case AUDIO_FORMAT_S32: 252 case AUDIO_FORMAT_U32: 253 break; 254 default: 255 invalid = 1; 256 break; 257 } 258 259 invalid |= as->freq <= 0; 260 return invalid ? -1 : 0; 261 } 262 263 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 264 { 265 int bits = 8, sign = 0; 266 267 switch (as->fmt) { 268 case AUDIO_FORMAT_S8: 269 sign = 1; 270 /* fall through */ 271 case AUDIO_FORMAT_U8: 272 break; 273 274 case AUDIO_FORMAT_S16: 275 sign = 1; 276 /* fall through */ 277 case AUDIO_FORMAT_U16: 278 bits = 16; 279 break; 280 281 case AUDIO_FORMAT_S32: 282 sign = 1; 283 /* fall through */ 284 case AUDIO_FORMAT_U32: 285 bits = 32; 286 break; 287 288 default: 289 abort(); 290 } 291 return info->freq == as->freq 292 && info->nchannels == as->nchannels 293 && info->sign == sign 294 && info->bits == bits 295 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 296 } 297 298 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 299 { 300 int bits = 8, sign = 0, shift = 0; 301 302 switch (as->fmt) { 303 case AUDIO_FORMAT_S8: 304 sign = 1; 305 case AUDIO_FORMAT_U8: 306 break; 307 308 case AUDIO_FORMAT_S16: 309 sign = 1; 310 case AUDIO_FORMAT_U16: 311 bits = 16; 312 shift = 1; 313 break; 314 315 case AUDIO_FORMAT_S32: 316 sign = 1; 317 case AUDIO_FORMAT_U32: 318 bits = 32; 319 shift = 2; 320 break; 321 322 default: 323 abort(); 324 } 325 326 info->freq = as->freq; 327 info->bits = bits; 328 info->sign = sign; 329 info->nchannels = as->nchannels; 330 info->shift = (as->nchannels == 2) + shift; 331 info->align = (1 << info->shift) - 1; 332 info->bytes_per_second = info->freq << info->shift; 333 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 334 } 335 336 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 337 { 338 if (!len) { 339 return; 340 } 341 342 if (info->sign) { 343 memset (buf, 0x00, len << info->shift); 344 } 345 else { 346 switch (info->bits) { 347 case 8: 348 memset (buf, 0x80, len << info->shift); 349 break; 350 351 case 16: 352 { 353 int i; 354 uint16_t *p = buf; 355 int shift = info->nchannels - 1; 356 short s = INT16_MAX; 357 358 if (info->swap_endianness) { 359 s = bswap16 (s); 360 } 361 362 for (i = 0; i < len << shift; i++) { 363 p[i] = s; 364 } 365 } 366 break; 367 368 case 32: 369 { 370 int i; 371 uint32_t *p = buf; 372 int shift = info->nchannels - 1; 373 int32_t s = INT32_MAX; 374 375 if (info->swap_endianness) { 376 s = bswap32 (s); 377 } 378 379 for (i = 0; i < len << shift; i++) { 380 p[i] = s; 381 } 382 } 383 break; 384 385 default: 386 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 387 info->bits); 388 break; 389 } 390 } 391 } 392 393 /* 394 * Capture 395 */ 396 static void noop_conv (struct st_sample *dst, const void *src, int samples) 397 { 398 (void) src; 399 (void) dst; 400 (void) samples; 401 } 402 403 static CaptureVoiceOut *audio_pcm_capture_find_specific ( 404 struct audsettings *as 405 ) 406 { 407 CaptureVoiceOut *cap; 408 AudioState *s = &glob_audio_state; 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 = &glob_audio_state; 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 int audio_pcm_hw_find_min_in (HWVoiceIn *hw) 530 { 531 SWVoiceIn *sw; 532 int 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 = audio_MIN (m, sw->total_hw_samples_acquired); 537 } 538 } 539 return m; 540 } 541 542 int audio_pcm_hw_get_live_in (HWVoiceIn *hw) 543 { 544 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 545 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 546 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 547 return 0; 548 } 549 return live; 550 } 551 552 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf, 553 int live, int pending) 554 { 555 int left = hw->samples - pending; 556 int len = audio_MIN (left, live); 557 int clipped = 0; 558 559 while (len) { 560 struct st_sample *src = hw->mix_buf + hw->rpos; 561 uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift); 562 int samples_till_end_of_buf = hw->samples - hw->rpos; 563 int samples_to_clip = audio_MIN (len, samples_till_end_of_buf); 564 565 hw->clip (dst, src, samples_to_clip); 566 567 hw->rpos = (hw->rpos + samples_to_clip) % hw->samples; 568 len -= samples_to_clip; 569 clipped += samples_to_clip; 570 } 571 return clipped; 572 } 573 574 /* 575 * Soft voice (capture) 576 */ 577 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw) 578 { 579 HWVoiceIn *hw = sw->hw; 580 int live = hw->total_samples_captured - sw->total_hw_samples_acquired; 581 int rpos; 582 583 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 584 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 585 return 0; 586 } 587 588 rpos = hw->wpos - live; 589 if (rpos >= 0) { 590 return rpos; 591 } 592 else { 593 return hw->samples + rpos; 594 } 595 } 596 597 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size) 598 { 599 HWVoiceIn *hw = sw->hw; 600 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 601 struct st_sample *src, *dst = sw->buf; 602 603 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples; 604 605 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 606 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 607 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples); 608 return 0; 609 } 610 611 samples = size >> sw->info.shift; 612 if (!live) { 613 return 0; 614 } 615 616 swlim = (live * sw->ratio) >> 32; 617 swlim = audio_MIN (swlim, samples); 618 619 while (swlim) { 620 src = hw->conv_buf + rpos; 621 isamp = hw->wpos - rpos; 622 /* XXX: <= ? */ 623 if (isamp <= 0) { 624 isamp = hw->samples - rpos; 625 } 626 627 if (!isamp) { 628 break; 629 } 630 osamp = swlim; 631 632 if (audio_bug(__func__, osamp < 0)) { 633 dolog ("osamp=%d\n", osamp); 634 return 0; 635 } 636 637 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 638 swlim -= osamp; 639 rpos = (rpos + isamp) % hw->samples; 640 dst += osamp; 641 ret += osamp; 642 total += isamp; 643 } 644 645 if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) { 646 mixeng_volume (sw->buf, ret, &sw->vol); 647 } 648 649 sw->clip (buf, sw->buf, ret); 650 sw->total_hw_samples_acquired += total; 651 return ret << sw->info.shift; 652 } 653 654 /* 655 * Hard voice (playback) 656 */ 657 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 658 { 659 SWVoiceOut *sw; 660 int m = INT_MAX; 661 int nb_live = 0; 662 663 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 664 if (sw->active || !sw->empty) { 665 m = audio_MIN (m, sw->total_hw_samples_mixed); 666 nb_live += 1; 667 } 668 } 669 670 *nb_livep = nb_live; 671 return m; 672 } 673 674 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 675 { 676 int smin; 677 int nb_live1; 678 679 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 680 if (nb_live) { 681 *nb_live = nb_live1; 682 } 683 684 if (nb_live1) { 685 int live = smin; 686 687 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 688 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 689 return 0; 690 } 691 return live; 692 } 693 return 0; 694 } 695 696 /* 697 * Soft voice (playback) 698 */ 699 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size) 700 { 701 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 702 int ret = 0, pos = 0, total = 0; 703 704 if (!sw) { 705 return size; 706 } 707 708 hwsamples = sw->hw->samples; 709 710 live = sw->total_hw_samples_mixed; 711 if (audio_bug(__func__, live < 0 || live > hwsamples)) { 712 dolog ("live=%d hw->samples=%d\n", live, hwsamples); 713 return 0; 714 } 715 716 if (live == hwsamples) { 717 #ifdef DEBUG_OUT 718 dolog ("%s is full %d\n", sw->name, live); 719 #endif 720 return 0; 721 } 722 723 wpos = (sw->hw->rpos + live) % hwsamples; 724 samples = size >> sw->info.shift; 725 726 dead = hwsamples - live; 727 swlim = ((int64_t) dead << 32) / sw->ratio; 728 swlim = audio_MIN (swlim, samples); 729 if (swlim) { 730 sw->conv (sw->buf, buf, swlim); 731 732 if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) { 733 mixeng_volume (sw->buf, swlim, &sw->vol); 734 } 735 } 736 737 while (swlim) { 738 dead = hwsamples - live; 739 left = hwsamples - wpos; 740 blck = audio_MIN (dead, left); 741 if (!blck) { 742 break; 743 } 744 isamp = swlim; 745 osamp = blck; 746 st_rate_flow_mix ( 747 sw->rate, 748 sw->buf + pos, 749 sw->hw->mix_buf + wpos, 750 &isamp, 751 &osamp 752 ); 753 ret += isamp; 754 swlim -= isamp; 755 pos += isamp; 756 live += osamp; 757 wpos = (wpos + osamp) % hwsamples; 758 total += osamp; 759 } 760 761 sw->total_hw_samples_mixed += total; 762 sw->empty = sw->total_hw_samples_mixed == 0; 763 764 #ifdef DEBUG_OUT 765 dolog ( 766 "%s: write size %d ret %d total sw %d\n", 767 SW_NAME (sw), 768 size >> sw->info.shift, 769 ret, 770 sw->total_hw_samples_mixed 771 ); 772 #endif 773 774 return ret << sw->info.shift; 775 } 776 777 #ifdef DEBUG_AUDIO 778 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 779 { 780 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n", 781 cap, info->bits, info->sign, info->freq, info->nchannels); 782 } 783 #endif 784 785 #define DAC 786 #include "audio_template.h" 787 #undef DAC 788 #include "audio_template.h" 789 790 /* 791 * Timer 792 */ 793 794 static bool audio_timer_running; 795 static uint64_t audio_timer_last; 796 797 static int audio_is_timer_needed (void) 798 { 799 HWVoiceIn *hwi = NULL; 800 HWVoiceOut *hwo = NULL; 801 802 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 803 if (!hwo->poll_mode) return 1; 804 } 805 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 806 if (!hwi->poll_mode) return 1; 807 } 808 return 0; 809 } 810 811 static void audio_reset_timer (AudioState *s) 812 { 813 if (audio_is_timer_needed ()) { 814 timer_mod_anticipate_ns(s->ts, 815 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 816 if (!audio_timer_running) { 817 audio_timer_running = true; 818 audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 819 trace_audio_timer_start(s->period_ticks / SCALE_MS); 820 } 821 } else { 822 timer_del(s->ts); 823 if (audio_timer_running) { 824 audio_timer_running = false; 825 trace_audio_timer_stop(); 826 } 827 } 828 } 829 830 static void audio_timer (void *opaque) 831 { 832 int64_t now, diff; 833 AudioState *s = opaque; 834 835 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 836 diff = now - audio_timer_last; 837 if (diff > s->period_ticks * 3 / 2) { 838 trace_audio_timer_delayed(diff / SCALE_MS); 839 } 840 audio_timer_last = now; 841 842 audio_run("timer"); 843 audio_reset_timer(s); 844 } 845 846 /* 847 * Public API 848 */ 849 int AUD_write (SWVoiceOut *sw, void *buf, int size) 850 { 851 if (!sw) { 852 /* XXX: Consider options */ 853 return size; 854 } 855 856 if (!sw->hw->enabled) { 857 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 858 return 0; 859 } 860 861 return sw->hw->pcm_ops->write(sw, buf, size); 862 } 863 864 int AUD_read (SWVoiceIn *sw, void *buf, int size) 865 { 866 if (!sw) { 867 /* XXX: Consider options */ 868 return size; 869 } 870 871 if (!sw->hw->enabled) { 872 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 873 return 0; 874 } 875 876 return sw->hw->pcm_ops->read(sw, buf, size); 877 } 878 879 int AUD_get_buffer_size_out (SWVoiceOut *sw) 880 { 881 return sw->hw->samples << sw->hw->info.shift; 882 } 883 884 void AUD_set_active_out (SWVoiceOut *sw, int on) 885 { 886 HWVoiceOut *hw; 887 888 if (!sw) { 889 return; 890 } 891 892 hw = sw->hw; 893 if (sw->active != on) { 894 AudioState *s = &glob_audio_state; 895 SWVoiceOut *temp_sw; 896 SWVoiceCap *sc; 897 898 if (on) { 899 hw->pending_disable = 0; 900 if (!hw->enabled) { 901 hw->enabled = 1; 902 if (s->vm_running) { 903 hw->pcm_ops->ctl_out(hw, VOICE_ENABLE); 904 audio_reset_timer (s); 905 } 906 } 907 } 908 else { 909 if (hw->enabled) { 910 int nb_active = 0; 911 912 for (temp_sw = hw->sw_head.lh_first; temp_sw; 913 temp_sw = temp_sw->entries.le_next) { 914 nb_active += temp_sw->active != 0; 915 } 916 917 hw->pending_disable = nb_active == 1; 918 } 919 } 920 921 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 922 sc->sw.active = hw->enabled; 923 if (hw->enabled) { 924 audio_capture_maybe_changed (sc->cap, 1); 925 } 926 } 927 sw->active = on; 928 } 929 } 930 931 void AUD_set_active_in (SWVoiceIn *sw, int on) 932 { 933 HWVoiceIn *hw; 934 935 if (!sw) { 936 return; 937 } 938 939 hw = sw->hw; 940 if (sw->active != on) { 941 AudioState *s = &glob_audio_state; 942 SWVoiceIn *temp_sw; 943 944 if (on) { 945 if (!hw->enabled) { 946 hw->enabled = 1; 947 if (s->vm_running) { 948 hw->pcm_ops->ctl_in(hw, VOICE_ENABLE); 949 audio_reset_timer (s); 950 } 951 } 952 sw->total_hw_samples_acquired = hw->total_samples_captured; 953 } 954 else { 955 if (hw->enabled) { 956 int nb_active = 0; 957 958 for (temp_sw = hw->sw_head.lh_first; temp_sw; 959 temp_sw = temp_sw->entries.le_next) { 960 nb_active += temp_sw->active != 0; 961 } 962 963 if (nb_active == 1) { 964 hw->enabled = 0; 965 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE); 966 } 967 } 968 } 969 sw->active = on; 970 } 971 } 972 973 static int audio_get_avail (SWVoiceIn *sw) 974 { 975 int live; 976 977 if (!sw) { 978 return 0; 979 } 980 981 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 982 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 983 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 984 return 0; 985 } 986 987 ldebug ( 988 "%s: get_avail live %d ret %" PRId64 "\n", 989 SW_NAME (sw), 990 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift 991 ); 992 993 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift; 994 } 995 996 static int audio_get_free (SWVoiceOut *sw) 997 { 998 int live, dead; 999 1000 if (!sw) { 1001 return 0; 1002 } 1003 1004 live = sw->total_hw_samples_mixed; 1005 1006 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 1007 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 1008 return 0; 1009 } 1010 1011 dead = sw->hw->samples - live; 1012 1013 #ifdef DEBUG_OUT 1014 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1015 SW_NAME (sw), 1016 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift); 1017 #endif 1018 1019 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift; 1020 } 1021 1022 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples) 1023 { 1024 int n; 1025 1026 if (hw->enabled) { 1027 SWVoiceCap *sc; 1028 1029 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1030 SWVoiceOut *sw = &sc->sw; 1031 int rpos2 = rpos; 1032 1033 n = samples; 1034 while (n) { 1035 int till_end_of_hw = hw->samples - rpos2; 1036 int to_write = audio_MIN (till_end_of_hw, n); 1037 int bytes = to_write << hw->info.shift; 1038 int written; 1039 1040 sw->buf = hw->mix_buf + rpos2; 1041 written = audio_pcm_sw_write (sw, NULL, bytes); 1042 if (written - bytes) { 1043 dolog ("Could not mix %d bytes into a capture " 1044 "buffer, mixed %d\n", 1045 bytes, written); 1046 break; 1047 } 1048 n -= to_write; 1049 rpos2 = (rpos2 + to_write) % hw->samples; 1050 } 1051 } 1052 } 1053 1054 n = audio_MIN (samples, hw->samples - rpos); 1055 mixeng_clear (hw->mix_buf + rpos, n); 1056 mixeng_clear (hw->mix_buf, samples - n); 1057 } 1058 1059 static void audio_run_out (AudioState *s) 1060 { 1061 HWVoiceOut *hw = NULL; 1062 SWVoiceOut *sw; 1063 1064 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) { 1065 int played; 1066 int live, free, nb_live, cleanup_required, prev_rpos; 1067 1068 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1069 if (!nb_live) { 1070 live = 0; 1071 } 1072 1073 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 1074 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 1075 continue; 1076 } 1077 1078 if (hw->pending_disable && !nb_live) { 1079 SWVoiceCap *sc; 1080 #ifdef DEBUG_OUT 1081 dolog ("Disabling voice\n"); 1082 #endif 1083 hw->enabled = 0; 1084 hw->pending_disable = 0; 1085 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE); 1086 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1087 sc->sw.active = 0; 1088 audio_recalc_and_notify_capture (sc->cap); 1089 } 1090 continue; 1091 } 1092 1093 if (!live) { 1094 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1095 if (sw->active) { 1096 free = audio_get_free (sw); 1097 if (free > 0) { 1098 sw->callback.fn (sw->callback.opaque, free); 1099 } 1100 } 1101 } 1102 continue; 1103 } 1104 1105 prev_rpos = hw->rpos; 1106 played = hw->pcm_ops->run_out (hw, live); 1107 replay_audio_out(&played); 1108 if (audio_bug(__func__, hw->rpos >= hw->samples)) { 1109 dolog ("hw->rpos=%d hw->samples=%d played=%d\n", 1110 hw->rpos, hw->samples, played); 1111 hw->rpos = 0; 1112 } 1113 1114 #ifdef DEBUG_OUT 1115 dolog ("played=%d\n", played); 1116 #endif 1117 1118 if (played) { 1119 hw->ts_helper += played; 1120 audio_capture_mix_and_clear (hw, prev_rpos, played); 1121 } 1122 1123 cleanup_required = 0; 1124 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1125 if (!sw->active && sw->empty) { 1126 continue; 1127 } 1128 1129 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1130 dolog ("played=%d sw->total_hw_samples_mixed=%d\n", 1131 played, sw->total_hw_samples_mixed); 1132 played = sw->total_hw_samples_mixed; 1133 } 1134 1135 sw->total_hw_samples_mixed -= played; 1136 1137 if (!sw->total_hw_samples_mixed) { 1138 sw->empty = 1; 1139 cleanup_required |= !sw->active && !sw->callback.fn; 1140 } 1141 1142 if (sw->active) { 1143 free = audio_get_free (sw); 1144 if (free > 0) { 1145 sw->callback.fn (sw->callback.opaque, free); 1146 } 1147 } 1148 } 1149 1150 if (cleanup_required) { 1151 SWVoiceOut *sw1; 1152 1153 sw = hw->sw_head.lh_first; 1154 while (sw) { 1155 sw1 = sw->entries.le_next; 1156 if (!sw->active && !sw->callback.fn) { 1157 audio_close_out (sw); 1158 } 1159 sw = sw1; 1160 } 1161 } 1162 } 1163 } 1164 1165 static void audio_run_in (AudioState *s) 1166 { 1167 HWVoiceIn *hw = NULL; 1168 1169 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) { 1170 SWVoiceIn *sw; 1171 int captured = 0, min; 1172 1173 if (replay_mode != REPLAY_MODE_PLAY) { 1174 captured = hw->pcm_ops->run_in(hw); 1175 } 1176 replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples); 1177 1178 min = audio_pcm_hw_find_min_in (hw); 1179 hw->total_samples_captured += captured - min; 1180 hw->ts_helper += captured; 1181 1182 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1183 sw->total_hw_samples_acquired -= min; 1184 1185 if (sw->active) { 1186 int avail; 1187 1188 avail = audio_get_avail (sw); 1189 if (avail > 0) { 1190 sw->callback.fn (sw->callback.opaque, avail); 1191 } 1192 } 1193 } 1194 } 1195 } 1196 1197 static void audio_run_capture (AudioState *s) 1198 { 1199 CaptureVoiceOut *cap; 1200 1201 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1202 int live, rpos, captured; 1203 HWVoiceOut *hw = &cap->hw; 1204 SWVoiceOut *sw; 1205 1206 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1207 rpos = hw->rpos; 1208 while (live) { 1209 int left = hw->samples - rpos; 1210 int to_capture = audio_MIN (live, left); 1211 struct st_sample *src; 1212 struct capture_callback *cb; 1213 1214 src = hw->mix_buf + rpos; 1215 hw->clip (cap->buf, src, to_capture); 1216 mixeng_clear (src, to_capture); 1217 1218 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1219 cb->ops.capture (cb->opaque, cap->buf, 1220 to_capture << hw->info.shift); 1221 } 1222 rpos = (rpos + to_capture) % hw->samples; 1223 live -= to_capture; 1224 } 1225 hw->rpos = rpos; 1226 1227 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1228 if (!sw->active && sw->empty) { 1229 continue; 1230 } 1231 1232 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1233 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n", 1234 captured, sw->total_hw_samples_mixed); 1235 captured = sw->total_hw_samples_mixed; 1236 } 1237 1238 sw->total_hw_samples_mixed -= captured; 1239 sw->empty = sw->total_hw_samples_mixed == 0; 1240 } 1241 } 1242 } 1243 1244 void audio_run (const char *msg) 1245 { 1246 AudioState *s = &glob_audio_state; 1247 1248 audio_run_out (s); 1249 audio_run_in (s); 1250 audio_run_capture (s); 1251 #ifdef DEBUG_POLL 1252 { 1253 static double prevtime; 1254 double currtime; 1255 struct timeval tv; 1256 1257 if (gettimeofday (&tv, NULL)) { 1258 perror ("audio_run: gettimeofday"); 1259 return; 1260 } 1261 1262 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1263 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1264 prevtime = currtime; 1265 } 1266 #endif 1267 } 1268 1269 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1270 bool msg, Audiodev *dev) 1271 { 1272 s->drv_opaque = drv->init(dev); 1273 1274 if (s->drv_opaque) { 1275 audio_init_nb_voices_out (drv); 1276 audio_init_nb_voices_in (drv); 1277 s->drv = drv; 1278 return 0; 1279 } 1280 else { 1281 if (msg) { 1282 dolog("Could not init `%s' audio driver\n", drv->name); 1283 } 1284 return -1; 1285 } 1286 } 1287 1288 static void audio_vm_change_state_handler (void *opaque, int running, 1289 RunState state) 1290 { 1291 AudioState *s = opaque; 1292 HWVoiceOut *hwo = NULL; 1293 HWVoiceIn *hwi = NULL; 1294 int op = running ? VOICE_ENABLE : VOICE_DISABLE; 1295 1296 s->vm_running = running; 1297 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 1298 hwo->pcm_ops->ctl_out(hwo, op); 1299 } 1300 1301 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 1302 hwi->pcm_ops->ctl_in(hwi, op); 1303 } 1304 audio_reset_timer (s); 1305 } 1306 1307 static bool is_cleaning_up; 1308 1309 bool audio_is_cleaning_up(void) 1310 { 1311 return is_cleaning_up; 1312 } 1313 1314 void audio_cleanup(void) 1315 { 1316 AudioState *s = &glob_audio_state; 1317 HWVoiceOut *hwo, *hwon; 1318 HWVoiceIn *hwi, *hwin; 1319 1320 is_cleaning_up = true; 1321 QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) { 1322 SWVoiceCap *sc; 1323 1324 if (hwo->enabled) { 1325 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE); 1326 } 1327 hwo->pcm_ops->fini_out (hwo); 1328 1329 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1330 CaptureVoiceOut *cap = sc->cap; 1331 struct capture_callback *cb; 1332 1333 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1334 cb->ops.destroy (cb->opaque); 1335 } 1336 } 1337 QLIST_REMOVE(hwo, entries); 1338 } 1339 1340 QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) { 1341 if (hwi->enabled) { 1342 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE); 1343 } 1344 hwi->pcm_ops->fini_in (hwi); 1345 QLIST_REMOVE(hwi, entries); 1346 } 1347 1348 if (s->drv) { 1349 s->drv->fini (s->drv_opaque); 1350 s->drv = NULL; 1351 } 1352 1353 if (s->dev) { 1354 qapi_free_Audiodev(s->dev); 1355 s->dev = NULL; 1356 } 1357 } 1358 1359 static const VMStateDescription vmstate_audio = { 1360 .name = "audio", 1361 .version_id = 1, 1362 .minimum_version_id = 1, 1363 .fields = (VMStateField[]) { 1364 VMSTATE_END_OF_LIST() 1365 } 1366 }; 1367 1368 static void audio_validate_opts(Audiodev *dev, Error **errp); 1369 1370 static AudiodevListEntry *audiodev_find( 1371 AudiodevListHead *head, const char *drvname) 1372 { 1373 AudiodevListEntry *e; 1374 QSIMPLEQ_FOREACH(e, head, next) { 1375 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1376 return e; 1377 } 1378 } 1379 1380 return NULL; 1381 } 1382 1383 static int audio_init(Audiodev *dev) 1384 { 1385 size_t i; 1386 int done = 0; 1387 const char *drvname = NULL; 1388 VMChangeStateEntry *e; 1389 AudioState *s = &glob_audio_state; 1390 struct audio_driver *driver; 1391 /* silence gcc warning about uninitialized variable */ 1392 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1393 1394 if (s->drv) { 1395 if (dev) { 1396 dolog("Cannot create more than one audio backend, sorry\n"); 1397 qapi_free_Audiodev(dev); 1398 } 1399 return -1; 1400 } 1401 1402 if (dev) { 1403 /* -audiodev option */ 1404 drvname = AudiodevDriver_str(dev->driver); 1405 } else { 1406 /* legacy implicit initialization */ 1407 head = audio_handle_legacy_opts(); 1408 /* 1409 * In case of legacy initialization, all Audiodevs in the list will have 1410 * the same configuration (except the driver), so it does't matter which 1411 * one we chose. We need an Audiodev to set up AudioState before we can 1412 * init a driver. Also note that dev at this point is still in the 1413 * list. 1414 */ 1415 dev = QSIMPLEQ_FIRST(&head)->dev; 1416 audio_validate_opts(dev, &error_abort); 1417 } 1418 s->dev = dev; 1419 1420 QLIST_INIT (&s->hw_head_out); 1421 QLIST_INIT (&s->hw_head_in); 1422 QLIST_INIT (&s->cap_head); 1423 atexit(audio_cleanup); 1424 1425 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1426 1427 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1428 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1429 1430 if (s->nb_hw_voices_out <= 0) { 1431 dolog ("Bogus number of playback voices %d, setting to 1\n", 1432 s->nb_hw_voices_out); 1433 s->nb_hw_voices_out = 1; 1434 } 1435 1436 if (s->nb_hw_voices_in <= 0) { 1437 dolog ("Bogus number of capture voices %d, setting to 0\n", 1438 s->nb_hw_voices_in); 1439 s->nb_hw_voices_in = 0; 1440 } 1441 1442 if (drvname) { 1443 driver = audio_driver_lookup(drvname); 1444 if (driver) { 1445 done = !audio_driver_init(s, driver, true, dev); 1446 } else { 1447 dolog ("Unknown audio driver `%s'\n", drvname); 1448 } 1449 } else { 1450 for (i = 0; audio_prio_list[i]; i++) { 1451 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1452 driver = audio_driver_lookup(audio_prio_list[i]); 1453 1454 if (e && driver) { 1455 s->dev = dev = e->dev; 1456 audio_validate_opts(dev, &error_abort); 1457 done = !audio_driver_init(s, driver, false, dev); 1458 if (done) { 1459 e->dev = NULL; 1460 break; 1461 } 1462 } 1463 } 1464 } 1465 audio_free_audiodev_list(&head); 1466 1467 if (!done) { 1468 driver = audio_driver_lookup("none"); 1469 done = !audio_driver_init(s, driver, false, dev); 1470 assert(done); 1471 dolog("warning: Using timer based audio emulation\n"); 1472 } 1473 1474 if (dev->timer_period <= 0) { 1475 s->period_ticks = 1; 1476 } else { 1477 s->period_ticks = dev->timer_period * SCALE_US; 1478 } 1479 1480 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1481 if (!e) { 1482 dolog ("warning: Could not register change state handler\n" 1483 "(Audio can continue looping even after stopping the VM)\n"); 1484 } 1485 1486 QLIST_INIT (&s->card_head); 1487 vmstate_register (NULL, 0, &vmstate_audio, s); 1488 return 0; 1489 } 1490 1491 void audio_free_audiodev_list(AudiodevListHead *head) 1492 { 1493 AudiodevListEntry *e; 1494 while ((e = QSIMPLEQ_FIRST(head))) { 1495 QSIMPLEQ_REMOVE_HEAD(head, next); 1496 qapi_free_Audiodev(e->dev); 1497 g_free(e); 1498 } 1499 } 1500 1501 void AUD_register_card (const char *name, QEMUSoundCard *card) 1502 { 1503 audio_init(NULL); 1504 card->name = g_strdup (name); 1505 memset (&card->entries, 0, sizeof (card->entries)); 1506 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries); 1507 } 1508 1509 void AUD_remove_card (QEMUSoundCard *card) 1510 { 1511 QLIST_REMOVE (card, entries); 1512 g_free (card->name); 1513 } 1514 1515 1516 CaptureVoiceOut *AUD_add_capture ( 1517 struct audsettings *as, 1518 struct audio_capture_ops *ops, 1519 void *cb_opaque 1520 ) 1521 { 1522 AudioState *s = &glob_audio_state; 1523 CaptureVoiceOut *cap; 1524 struct capture_callback *cb; 1525 1526 if (audio_validate_settings (as)) { 1527 dolog ("Invalid settings were passed when trying to add capture\n"); 1528 audio_print_settings (as); 1529 return NULL; 1530 } 1531 1532 cb = g_malloc0(sizeof(*cb)); 1533 cb->ops = *ops; 1534 cb->opaque = cb_opaque; 1535 1536 cap = audio_pcm_capture_find_specific (as); 1537 if (cap) { 1538 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1539 return cap; 1540 } 1541 else { 1542 HWVoiceOut *hw; 1543 CaptureVoiceOut *cap; 1544 1545 cap = g_malloc0(sizeof(*cap)); 1546 1547 hw = &cap->hw; 1548 QLIST_INIT (&hw->sw_head); 1549 QLIST_INIT (&cap->cb_head); 1550 1551 /* XXX find a more elegant way */ 1552 hw->samples = 4096 * 4; 1553 hw->mix_buf = g_new0(struct st_sample, hw->samples); 1554 1555 audio_pcm_init_info (&hw->info, as); 1556 1557 cap->buf = g_malloc0_n(hw->samples, 1 << hw->info.shift); 1558 1559 hw->clip = mixeng_clip 1560 [hw->info.nchannels == 2] 1561 [hw->info.sign] 1562 [hw->info.swap_endianness] 1563 [audio_bits_to_index (hw->info.bits)]; 1564 1565 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1566 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1567 1568 QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) { 1569 audio_attach_capture (hw); 1570 } 1571 return cap; 1572 } 1573 } 1574 1575 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1576 { 1577 struct capture_callback *cb; 1578 1579 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1580 if (cb->opaque == cb_opaque) { 1581 cb->ops.destroy (cb_opaque); 1582 QLIST_REMOVE (cb, entries); 1583 g_free (cb); 1584 1585 if (!cap->cb_head.lh_first) { 1586 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1587 1588 while (sw) { 1589 SWVoiceCap *sc = (SWVoiceCap *) sw; 1590 #ifdef DEBUG_CAPTURE 1591 dolog ("freeing %s\n", sw->name); 1592 #endif 1593 1594 sw1 = sw->entries.le_next; 1595 if (sw->rate) { 1596 st_rate_stop (sw->rate); 1597 sw->rate = NULL; 1598 } 1599 QLIST_REMOVE (sw, entries); 1600 QLIST_REMOVE (sc, entries); 1601 g_free (sc); 1602 sw = sw1; 1603 } 1604 QLIST_REMOVE (cap, entries); 1605 g_free (cap->hw.mix_buf); 1606 g_free (cap->buf); 1607 g_free (cap); 1608 } 1609 return; 1610 } 1611 } 1612 } 1613 1614 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1615 { 1616 if (sw) { 1617 HWVoiceOut *hw = sw->hw; 1618 1619 sw->vol.mute = mute; 1620 sw->vol.l = nominal_volume.l * lvol / 255; 1621 sw->vol.r = nominal_volume.r * rvol / 255; 1622 1623 if (hw->pcm_ops->ctl_out) { 1624 hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw); 1625 } 1626 } 1627 } 1628 1629 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1630 { 1631 if (sw) { 1632 HWVoiceIn *hw = sw->hw; 1633 1634 sw->vol.mute = mute; 1635 sw->vol.l = nominal_volume.l * lvol / 255; 1636 sw->vol.r = nominal_volume.r * rvol / 255; 1637 1638 if (hw->pcm_ops->ctl_in) { 1639 hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw); 1640 } 1641 } 1642 } 1643 1644 void audio_create_pdos(Audiodev *dev) 1645 { 1646 switch (dev->driver) { 1647 #define CASE(DRIVER, driver, pdo_name) \ 1648 case AUDIODEV_DRIVER_##DRIVER: \ 1649 if (!dev->u.driver.has_in) { \ 1650 dev->u.driver.in = g_malloc0( \ 1651 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1652 dev->u.driver.has_in = true; \ 1653 } \ 1654 if (!dev->u.driver.has_out) { \ 1655 dev->u.driver.out = g_malloc0( \ 1656 sizeof(AudiodevAlsaPerDirectionOptions)); \ 1657 dev->u.driver.has_out = true; \ 1658 } \ 1659 break 1660 1661 CASE(NONE, none, ); 1662 CASE(ALSA, alsa, Alsa); 1663 CASE(COREAUDIO, coreaudio, Coreaudio); 1664 CASE(DSOUND, dsound, ); 1665 CASE(OSS, oss, Oss); 1666 CASE(PA, pa, Pa); 1667 CASE(SDL, sdl, ); 1668 CASE(SPICE, spice, ); 1669 CASE(WAV, wav, ); 1670 1671 case AUDIODEV_DRIVER__MAX: 1672 abort(); 1673 }; 1674 } 1675 1676 static void audio_validate_per_direction_opts( 1677 AudiodevPerDirectionOptions *pdo, Error **errp) 1678 { 1679 if (!pdo->has_fixed_settings) { 1680 pdo->has_fixed_settings = true; 1681 pdo->fixed_settings = true; 1682 } 1683 if (!pdo->fixed_settings && 1684 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1685 error_setg(errp, 1686 "You can't use frequency, channels or format with fixed-settings=off"); 1687 return; 1688 } 1689 1690 if (!pdo->has_frequency) { 1691 pdo->has_frequency = true; 1692 pdo->frequency = 44100; 1693 } 1694 if (!pdo->has_channels) { 1695 pdo->has_channels = true; 1696 pdo->channels = 2; 1697 } 1698 if (!pdo->has_voices) { 1699 pdo->has_voices = true; 1700 pdo->voices = 1; 1701 } 1702 if (!pdo->has_format) { 1703 pdo->has_format = true; 1704 pdo->format = AUDIO_FORMAT_S16; 1705 } 1706 } 1707 1708 static void audio_validate_opts(Audiodev *dev, Error **errp) 1709 { 1710 Error *err = NULL; 1711 1712 audio_create_pdos(dev); 1713 1714 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 1715 if (err) { 1716 error_propagate(errp, err); 1717 return; 1718 } 1719 1720 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 1721 if (err) { 1722 error_propagate(errp, err); 1723 return; 1724 } 1725 1726 if (!dev->has_timer_period) { 1727 dev->has_timer_period = true; 1728 dev->timer_period = 10000; /* 100Hz -> 10ms */ 1729 } 1730 } 1731 1732 void audio_parse_option(const char *opt) 1733 { 1734 AudiodevListEntry *e; 1735 Audiodev *dev = NULL; 1736 1737 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 1738 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 1739 visit_free(v); 1740 1741 audio_validate_opts(dev, &error_fatal); 1742 1743 e = g_malloc0(sizeof(AudiodevListEntry)); 1744 e->dev = dev; 1745 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 1746 } 1747 1748 void audio_init_audiodevs(void) 1749 { 1750 AudiodevListEntry *e; 1751 1752 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 1753 audio_init(e->dev); 1754 } 1755 } 1756 1757 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 1758 { 1759 return (audsettings) { 1760 .freq = pdo->frequency, 1761 .nchannels = pdo->channels, 1762 .fmt = pdo->format, 1763 .endianness = AUDIO_HOST_ENDIANNESS, 1764 }; 1765 } 1766 1767 int audioformat_bytes_per_sample(AudioFormat fmt) 1768 { 1769 switch (fmt) { 1770 case AUDIO_FORMAT_U8: 1771 case AUDIO_FORMAT_S8: 1772 return 1; 1773 1774 case AUDIO_FORMAT_U16: 1775 case AUDIO_FORMAT_S16: 1776 return 2; 1777 1778 case AUDIO_FORMAT_U32: 1779 case AUDIO_FORMAT_S32: 1780 return 4; 1781 1782 case AUDIO_FORMAT__MAX: 1783 ; 1784 } 1785 abort(); 1786 } 1787 1788 1789 /* frames = freq * usec / 1e6 */ 1790 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 1791 audsettings *as, int def_usecs) 1792 { 1793 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 1794 return (as->freq * usecs + 500000) / 1000000; 1795 } 1796 1797 /* samples = channels * frames = channels * freq * usec / 1e6 */ 1798 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 1799 audsettings *as, int def_usecs) 1800 { 1801 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 1802 } 1803 1804 /* 1805 * bytes = bytes_per_sample * samples = 1806 * bytes_per_sample * channels * freq * usec / 1e6 1807 */ 1808 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 1809 audsettings *as, int def_usecs) 1810 { 1811 return audio_buffer_samples(pdo, as, def_usecs) * 1812 audioformat_bytes_per_sample(as->fmt); 1813 } 1814