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 "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 "sysemu/sysemu.h" 34 #include "qemu/cutils.h" 35 #include "qemu/module.h" 36 #include "sysemu/replay.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 AudioState glob_audio_state; 91 92 const struct mixeng_volume nominal_volume = { 93 .mute = 0, 94 #ifdef FLOAT_MIXENG 95 .r = 1.0, 96 .l = 1.0, 97 #else 98 .r = 1ULL << 32, 99 .l = 1ULL << 32, 100 #endif 101 }; 102 103 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED 104 #error No its not 105 #else 106 int audio_bug (const char *funcname, int cond) 107 { 108 if (cond) { 109 static int shown; 110 111 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 112 if (!shown) { 113 shown = 1; 114 AUD_log (NULL, "Save all your work and restart without audio\n"); 115 AUD_log (NULL, "I am sorry\n"); 116 } 117 AUD_log (NULL, "Context:\n"); 118 119 #if defined AUDIO_BREAKPOINT_ON_BUG 120 # if defined HOST_I386 121 # if defined __GNUC__ 122 __asm__ ("int3"); 123 # elif defined _MSC_VER 124 _asm _emit 0xcc; 125 # else 126 abort (); 127 # endif 128 # else 129 abort (); 130 # endif 131 #endif 132 } 133 134 return cond; 135 } 136 #endif 137 138 static inline int audio_bits_to_index (int bits) 139 { 140 switch (bits) { 141 case 8: 142 return 0; 143 144 case 16: 145 return 1; 146 147 case 32: 148 return 2; 149 150 default: 151 audio_bug ("bits_to_index", 1); 152 AUD_log (NULL, "invalid bits %d\n", bits); 153 return 0; 154 } 155 } 156 157 void *audio_calloc (const char *funcname, int nmemb, size_t size) 158 { 159 int cond; 160 size_t len; 161 162 len = nmemb * size; 163 cond = !nmemb || !size; 164 cond |= nmemb < 0; 165 cond |= len < size; 166 167 if (audio_bug ("audio_calloc", cond)) { 168 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 169 funcname); 170 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 171 return NULL; 172 } 173 174 return g_malloc0 (len); 175 } 176 177 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 178 { 179 if (cap) { 180 fprintf(stderr, "%s: ", cap); 181 } 182 183 vfprintf(stderr, fmt, ap); 184 } 185 186 void AUD_log (const char *cap, const char *fmt, ...) 187 { 188 va_list ap; 189 190 va_start (ap, fmt); 191 AUD_vlog (cap, fmt, ap); 192 va_end (ap); 193 } 194 195 static void audio_print_settings (struct audsettings *as) 196 { 197 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 198 199 switch (as->fmt) { 200 case AUDIO_FORMAT_S8: 201 AUD_log (NULL, "S8"); 202 break; 203 case AUDIO_FORMAT_U8: 204 AUD_log (NULL, "U8"); 205 break; 206 case AUDIO_FORMAT_S16: 207 AUD_log (NULL, "S16"); 208 break; 209 case AUDIO_FORMAT_U16: 210 AUD_log (NULL, "U16"); 211 break; 212 case AUDIO_FORMAT_S32: 213 AUD_log (NULL, "S32"); 214 break; 215 case AUDIO_FORMAT_U32: 216 AUD_log (NULL, "U32"); 217 break; 218 default: 219 AUD_log (NULL, "invalid(%d)", as->fmt); 220 break; 221 } 222 223 AUD_log (NULL, " endianness="); 224 switch (as->endianness) { 225 case 0: 226 AUD_log (NULL, "little"); 227 break; 228 case 1: 229 AUD_log (NULL, "big"); 230 break; 231 default: 232 AUD_log (NULL, "invalid"); 233 break; 234 } 235 AUD_log (NULL, "\n"); 236 } 237 238 static int audio_validate_settings (struct audsettings *as) 239 { 240 int invalid; 241 242 invalid = as->nchannels != 1 && as->nchannels != 2; 243 invalid |= as->endianness != 0 && as->endianness != 1; 244 245 switch (as->fmt) { 246 case AUDIO_FORMAT_S8: 247 case AUDIO_FORMAT_U8: 248 case AUDIO_FORMAT_S16: 249 case AUDIO_FORMAT_U16: 250 case AUDIO_FORMAT_S32: 251 case AUDIO_FORMAT_U32: 252 break; 253 default: 254 invalid = 1; 255 break; 256 } 257 258 invalid |= as->freq <= 0; 259 return invalid ? -1 : 0; 260 } 261 262 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 263 { 264 int bits = 8, sign = 0; 265 266 switch (as->fmt) { 267 case AUDIO_FORMAT_S8: 268 sign = 1; 269 /* fall through */ 270 case AUDIO_FORMAT_U8: 271 break; 272 273 case AUDIO_FORMAT_S16: 274 sign = 1; 275 /* fall through */ 276 case AUDIO_FORMAT_U16: 277 bits = 16; 278 break; 279 280 case AUDIO_FORMAT_S32: 281 sign = 1; 282 /* fall through */ 283 case AUDIO_FORMAT_U32: 284 bits = 32; 285 break; 286 287 default: 288 abort(); 289 } 290 return info->freq == as->freq 291 && info->nchannels == as->nchannels 292 && info->sign == sign 293 && info->bits == bits 294 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 295 } 296 297 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 298 { 299 int bits = 8, sign = 0, shift = 0; 300 301 switch (as->fmt) { 302 case AUDIO_FORMAT_S8: 303 sign = 1; 304 case AUDIO_FORMAT_U8: 305 break; 306 307 case AUDIO_FORMAT_S16: 308 sign = 1; 309 case AUDIO_FORMAT_U16: 310 bits = 16; 311 shift = 1; 312 break; 313 314 case AUDIO_FORMAT_S32: 315 sign = 1; 316 case AUDIO_FORMAT_U32: 317 bits = 32; 318 shift = 2; 319 break; 320 321 default: 322 abort(); 323 } 324 325 info->freq = as->freq; 326 info->bits = bits; 327 info->sign = sign; 328 info->nchannels = as->nchannels; 329 info->shift = (as->nchannels == 2) + shift; 330 info->align = (1 << info->shift) - 1; 331 info->bytes_per_second = info->freq << info->shift; 332 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 333 } 334 335 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 336 { 337 if (!len) { 338 return; 339 } 340 341 if (info->sign) { 342 memset (buf, 0x00, len << info->shift); 343 } 344 else { 345 switch (info->bits) { 346 case 8: 347 memset (buf, 0x80, len << info->shift); 348 break; 349 350 case 16: 351 { 352 int i; 353 uint16_t *p = buf; 354 int shift = info->nchannels - 1; 355 short s = INT16_MAX; 356 357 if (info->swap_endianness) { 358 s = bswap16 (s); 359 } 360 361 for (i = 0; i < len << shift; i++) { 362 p[i] = s; 363 } 364 } 365 break; 366 367 case 32: 368 { 369 int i; 370 uint32_t *p = buf; 371 int shift = info->nchannels - 1; 372 int32_t s = INT32_MAX; 373 374 if (info->swap_endianness) { 375 s = bswap32 (s); 376 } 377 378 for (i = 0; i < len << shift; i++) { 379 p[i] = s; 380 } 381 } 382 break; 383 384 default: 385 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 386 info->bits); 387 break; 388 } 389 } 390 } 391 392 /* 393 * Capture 394 */ 395 static void noop_conv (struct st_sample *dst, const void *src, int samples) 396 { 397 (void) src; 398 (void) dst; 399 (void) samples; 400 } 401 402 static CaptureVoiceOut *audio_pcm_capture_find_specific ( 403 struct audsettings *as 404 ) 405 { 406 CaptureVoiceOut *cap; 407 AudioState *s = &glob_audio_state; 408 409 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 410 if (audio_pcm_info_eq (&cap->hw.info, as)) { 411 return cap; 412 } 413 } 414 return NULL; 415 } 416 417 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 418 { 419 struct capture_callback *cb; 420 421 #ifdef DEBUG_CAPTURE 422 dolog ("notification %d sent\n", cmd); 423 #endif 424 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 425 cb->ops.notify (cb->opaque, cmd); 426 } 427 } 428 429 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 430 { 431 if (cap->hw.enabled != enabled) { 432 audcnotification_e cmd; 433 cap->hw.enabled = enabled; 434 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 435 audio_notify_capture (cap, cmd); 436 } 437 } 438 439 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 440 { 441 HWVoiceOut *hw = &cap->hw; 442 SWVoiceOut *sw; 443 int enabled = 0; 444 445 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 446 if (sw->active) { 447 enabled = 1; 448 break; 449 } 450 } 451 audio_capture_maybe_changed (cap, enabled); 452 } 453 454 static void audio_detach_capture (HWVoiceOut *hw) 455 { 456 SWVoiceCap *sc = hw->cap_head.lh_first; 457 458 while (sc) { 459 SWVoiceCap *sc1 = sc->entries.le_next; 460 SWVoiceOut *sw = &sc->sw; 461 CaptureVoiceOut *cap = sc->cap; 462 int was_active = sw->active; 463 464 if (sw->rate) { 465 st_rate_stop (sw->rate); 466 sw->rate = NULL; 467 } 468 469 QLIST_REMOVE (sw, entries); 470 QLIST_REMOVE (sc, entries); 471 g_free (sc); 472 if (was_active) { 473 /* We have removed soft voice from the capture: 474 this might have changed the overall status of the capture 475 since this might have been the only active voice */ 476 audio_recalc_and_notify_capture (cap); 477 } 478 sc = sc1; 479 } 480 } 481 482 static int audio_attach_capture (HWVoiceOut *hw) 483 { 484 AudioState *s = &glob_audio_state; 485 CaptureVoiceOut *cap; 486 487 audio_detach_capture (hw); 488 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 489 SWVoiceCap *sc; 490 SWVoiceOut *sw; 491 HWVoiceOut *hw_cap = &cap->hw; 492 493 sc = g_malloc0(sizeof(*sc)); 494 495 sc->cap = cap; 496 sw = &sc->sw; 497 sw->hw = hw_cap; 498 sw->info = hw->info; 499 sw->empty = 1; 500 sw->active = hw->enabled; 501 sw->conv = noop_conv; 502 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 503 sw->vol = nominal_volume; 504 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 505 if (!sw->rate) { 506 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 507 g_free (sw); 508 return -1; 509 } 510 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 511 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 512 #ifdef DEBUG_CAPTURE 513 sw->name = g_strdup_printf ("for %p %d,%d,%d", 514 hw, sw->info.freq, sw->info.bits, 515 sw->info.nchannels); 516 dolog ("Added %s active = %d\n", sw->name, sw->active); 517 #endif 518 if (sw->active) { 519 audio_capture_maybe_changed (cap, 1); 520 } 521 } 522 return 0; 523 } 524 525 /* 526 * Hard voice (capture) 527 */ 528 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw) 529 { 530 SWVoiceIn *sw; 531 int m = hw->total_samples_captured; 532 533 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 534 if (sw->active) { 535 m = audio_MIN (m, sw->total_hw_samples_acquired); 536 } 537 } 538 return m; 539 } 540 541 int audio_pcm_hw_get_live_in (HWVoiceIn *hw) 542 { 543 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 544 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 545 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 546 return 0; 547 } 548 return live; 549 } 550 551 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf, 552 int live, int pending) 553 { 554 int left = hw->samples - pending; 555 int len = audio_MIN (left, live); 556 int clipped = 0; 557 558 while (len) { 559 struct st_sample *src = hw->mix_buf + hw->rpos; 560 uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift); 561 int samples_till_end_of_buf = hw->samples - hw->rpos; 562 int samples_to_clip = audio_MIN (len, samples_till_end_of_buf); 563 564 hw->clip (dst, src, samples_to_clip); 565 566 hw->rpos = (hw->rpos + samples_to_clip) % hw->samples; 567 len -= samples_to_clip; 568 clipped += samples_to_clip; 569 } 570 return clipped; 571 } 572 573 /* 574 * Soft voice (capture) 575 */ 576 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw) 577 { 578 HWVoiceIn *hw = sw->hw; 579 int live = hw->total_samples_captured - sw->total_hw_samples_acquired; 580 int rpos; 581 582 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 583 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 584 return 0; 585 } 586 587 rpos = hw->wpos - live; 588 if (rpos >= 0) { 589 return rpos; 590 } 591 else { 592 return hw->samples + rpos; 593 } 594 } 595 596 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size) 597 { 598 HWVoiceIn *hw = sw->hw; 599 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 600 struct st_sample *src, *dst = sw->buf; 601 602 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples; 603 604 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 605 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 606 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples); 607 return 0; 608 } 609 610 samples = size >> sw->info.shift; 611 if (!live) { 612 return 0; 613 } 614 615 swlim = (live * sw->ratio) >> 32; 616 swlim = audio_MIN (swlim, samples); 617 618 while (swlim) { 619 src = hw->conv_buf + rpos; 620 isamp = hw->wpos - rpos; 621 /* XXX: <= ? */ 622 if (isamp <= 0) { 623 isamp = hw->samples - rpos; 624 } 625 626 if (!isamp) { 627 break; 628 } 629 osamp = swlim; 630 631 if (audio_bug(__func__, osamp < 0)) { 632 dolog ("osamp=%d\n", osamp); 633 return 0; 634 } 635 636 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 637 swlim -= osamp; 638 rpos = (rpos + isamp) % hw->samples; 639 dst += osamp; 640 ret += osamp; 641 total += isamp; 642 } 643 644 if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) { 645 mixeng_volume (sw->buf, ret, &sw->vol); 646 } 647 648 sw->clip (buf, sw->buf, ret); 649 sw->total_hw_samples_acquired += total; 650 return ret << sw->info.shift; 651 } 652 653 /* 654 * Hard voice (playback) 655 */ 656 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 657 { 658 SWVoiceOut *sw; 659 int m = INT_MAX; 660 int nb_live = 0; 661 662 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 663 if (sw->active || !sw->empty) { 664 m = audio_MIN (m, sw->total_hw_samples_mixed); 665 nb_live += 1; 666 } 667 } 668 669 *nb_livep = nb_live; 670 return m; 671 } 672 673 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 674 { 675 int smin; 676 int nb_live1; 677 678 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 679 if (nb_live) { 680 *nb_live = nb_live1; 681 } 682 683 if (nb_live1) { 684 int live = smin; 685 686 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 687 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 688 return 0; 689 } 690 return live; 691 } 692 return 0; 693 } 694 695 /* 696 * Soft voice (playback) 697 */ 698 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size) 699 { 700 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 701 int ret = 0, pos = 0, total = 0; 702 703 if (!sw) { 704 return size; 705 } 706 707 hwsamples = sw->hw->samples; 708 709 live = sw->total_hw_samples_mixed; 710 if (audio_bug(__func__, live < 0 || live > hwsamples)) { 711 dolog ("live=%d hw->samples=%d\n", live, hwsamples); 712 return 0; 713 } 714 715 if (live == hwsamples) { 716 #ifdef DEBUG_OUT 717 dolog ("%s is full %d\n", sw->name, live); 718 #endif 719 return 0; 720 } 721 722 wpos = (sw->hw->rpos + live) % hwsamples; 723 samples = size >> sw->info.shift; 724 725 dead = hwsamples - live; 726 swlim = ((int64_t) dead << 32) / sw->ratio; 727 swlim = audio_MIN (swlim, samples); 728 if (swlim) { 729 sw->conv (sw->buf, buf, swlim); 730 731 if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) { 732 mixeng_volume (sw->buf, swlim, &sw->vol); 733 } 734 } 735 736 while (swlim) { 737 dead = hwsamples - live; 738 left = hwsamples - wpos; 739 blck = audio_MIN (dead, left); 740 if (!blck) { 741 break; 742 } 743 isamp = swlim; 744 osamp = blck; 745 st_rate_flow_mix ( 746 sw->rate, 747 sw->buf + pos, 748 sw->hw->mix_buf + wpos, 749 &isamp, 750 &osamp 751 ); 752 ret += isamp; 753 swlim -= isamp; 754 pos += isamp; 755 live += osamp; 756 wpos = (wpos + osamp) % hwsamples; 757 total += osamp; 758 } 759 760 sw->total_hw_samples_mixed += total; 761 sw->empty = sw->total_hw_samples_mixed == 0; 762 763 #ifdef DEBUG_OUT 764 dolog ( 765 "%s: write size %d ret %d total sw %d\n", 766 SW_NAME (sw), 767 size >> sw->info.shift, 768 ret, 769 sw->total_hw_samples_mixed 770 ); 771 #endif 772 773 return ret << sw->info.shift; 774 } 775 776 #ifdef DEBUG_AUDIO 777 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 778 { 779 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n", 780 cap, info->bits, info->sign, info->freq, info->nchannels); 781 } 782 #endif 783 784 #define DAC 785 #include "audio_template.h" 786 #undef DAC 787 #include "audio_template.h" 788 789 /* 790 * Timer 791 */ 792 793 static bool audio_timer_running; 794 static uint64_t audio_timer_last; 795 796 static int audio_is_timer_needed (void) 797 { 798 HWVoiceIn *hwi = NULL; 799 HWVoiceOut *hwo = NULL; 800 801 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 802 if (!hwo->poll_mode) return 1; 803 } 804 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 805 if (!hwi->poll_mode) return 1; 806 } 807 return 0; 808 } 809 810 static void audio_reset_timer (AudioState *s) 811 { 812 if (audio_is_timer_needed ()) { 813 timer_mod_anticipate_ns(s->ts, 814 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 815 if (!audio_timer_running) { 816 audio_timer_running = true; 817 audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 818 trace_audio_timer_start(s->period_ticks / SCALE_MS); 819 } 820 } else { 821 timer_del(s->ts); 822 if (audio_timer_running) { 823 audio_timer_running = false; 824 trace_audio_timer_stop(); 825 } 826 } 827 } 828 829 static void audio_timer (void *opaque) 830 { 831 int64_t now, diff; 832 AudioState *s = opaque; 833 834 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 835 diff = now - audio_timer_last; 836 if (diff > s->period_ticks * 3 / 2) { 837 trace_audio_timer_delayed(diff / SCALE_MS); 838 } 839 audio_timer_last = now; 840 841 audio_run("timer"); 842 audio_reset_timer(s); 843 } 844 845 /* 846 * Public API 847 */ 848 int AUD_write (SWVoiceOut *sw, void *buf, int size) 849 { 850 if (!sw) { 851 /* XXX: Consider options */ 852 return size; 853 } 854 855 if (!sw->hw->enabled) { 856 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 857 return 0; 858 } 859 860 return sw->hw->pcm_ops->write(sw, buf, size); 861 } 862 863 int AUD_read (SWVoiceIn *sw, void *buf, int size) 864 { 865 if (!sw) { 866 /* XXX: Consider options */ 867 return size; 868 } 869 870 if (!sw->hw->enabled) { 871 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 872 return 0; 873 } 874 875 return sw->hw->pcm_ops->read(sw, buf, size); 876 } 877 878 int AUD_get_buffer_size_out (SWVoiceOut *sw) 879 { 880 return sw->hw->samples << sw->hw->info.shift; 881 } 882 883 void AUD_set_active_out (SWVoiceOut *sw, int on) 884 { 885 HWVoiceOut *hw; 886 887 if (!sw) { 888 return; 889 } 890 891 hw = sw->hw; 892 if (sw->active != on) { 893 AudioState *s = &glob_audio_state; 894 SWVoiceOut *temp_sw; 895 SWVoiceCap *sc; 896 897 if (on) { 898 hw->pending_disable = 0; 899 if (!hw->enabled) { 900 hw->enabled = 1; 901 if (s->vm_running) { 902 hw->pcm_ops->ctl_out(hw, VOICE_ENABLE); 903 audio_reset_timer (s); 904 } 905 } 906 } 907 else { 908 if (hw->enabled) { 909 int nb_active = 0; 910 911 for (temp_sw = hw->sw_head.lh_first; temp_sw; 912 temp_sw = temp_sw->entries.le_next) { 913 nb_active += temp_sw->active != 0; 914 } 915 916 hw->pending_disable = nb_active == 1; 917 } 918 } 919 920 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 921 sc->sw.active = hw->enabled; 922 if (hw->enabled) { 923 audio_capture_maybe_changed (sc->cap, 1); 924 } 925 } 926 sw->active = on; 927 } 928 } 929 930 void AUD_set_active_in (SWVoiceIn *sw, int on) 931 { 932 HWVoiceIn *hw; 933 934 if (!sw) { 935 return; 936 } 937 938 hw = sw->hw; 939 if (sw->active != on) { 940 AudioState *s = &glob_audio_state; 941 SWVoiceIn *temp_sw; 942 943 if (on) { 944 if (!hw->enabled) { 945 hw->enabled = 1; 946 if (s->vm_running) { 947 hw->pcm_ops->ctl_in(hw, VOICE_ENABLE); 948 audio_reset_timer (s); 949 } 950 } 951 sw->total_hw_samples_acquired = hw->total_samples_captured; 952 } 953 else { 954 if (hw->enabled) { 955 int nb_active = 0; 956 957 for (temp_sw = hw->sw_head.lh_first; temp_sw; 958 temp_sw = temp_sw->entries.le_next) { 959 nb_active += temp_sw->active != 0; 960 } 961 962 if (nb_active == 1) { 963 hw->enabled = 0; 964 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE); 965 } 966 } 967 } 968 sw->active = on; 969 } 970 } 971 972 static int audio_get_avail (SWVoiceIn *sw) 973 { 974 int live; 975 976 if (!sw) { 977 return 0; 978 } 979 980 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 981 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 982 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 983 return 0; 984 } 985 986 ldebug ( 987 "%s: get_avail live %d ret %" PRId64 "\n", 988 SW_NAME (sw), 989 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift 990 ); 991 992 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift; 993 } 994 995 static int audio_get_free (SWVoiceOut *sw) 996 { 997 int live, dead; 998 999 if (!sw) { 1000 return 0; 1001 } 1002 1003 live = sw->total_hw_samples_mixed; 1004 1005 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 1006 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 1007 return 0; 1008 } 1009 1010 dead = sw->hw->samples - live; 1011 1012 #ifdef DEBUG_OUT 1013 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1014 SW_NAME (sw), 1015 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift); 1016 #endif 1017 1018 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift; 1019 } 1020 1021 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples) 1022 { 1023 int n; 1024 1025 if (hw->enabled) { 1026 SWVoiceCap *sc; 1027 1028 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1029 SWVoiceOut *sw = &sc->sw; 1030 int rpos2 = rpos; 1031 1032 n = samples; 1033 while (n) { 1034 int till_end_of_hw = hw->samples - rpos2; 1035 int to_write = audio_MIN (till_end_of_hw, n); 1036 int bytes = to_write << hw->info.shift; 1037 int written; 1038 1039 sw->buf = hw->mix_buf + rpos2; 1040 written = audio_pcm_sw_write (sw, NULL, bytes); 1041 if (written - bytes) { 1042 dolog ("Could not mix %d bytes into a capture " 1043 "buffer, mixed %d\n", 1044 bytes, written); 1045 break; 1046 } 1047 n -= to_write; 1048 rpos2 = (rpos2 + to_write) % hw->samples; 1049 } 1050 } 1051 } 1052 1053 n = audio_MIN (samples, hw->samples - rpos); 1054 mixeng_clear (hw->mix_buf + rpos, n); 1055 mixeng_clear (hw->mix_buf, samples - n); 1056 } 1057 1058 static void audio_run_out (AudioState *s) 1059 { 1060 HWVoiceOut *hw = NULL; 1061 SWVoiceOut *sw; 1062 1063 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) { 1064 int played; 1065 int live, free, nb_live, cleanup_required, prev_rpos; 1066 1067 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1068 if (!nb_live) { 1069 live = 0; 1070 } 1071 1072 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 1073 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 1074 continue; 1075 } 1076 1077 if (hw->pending_disable && !nb_live) { 1078 SWVoiceCap *sc; 1079 #ifdef DEBUG_OUT 1080 dolog ("Disabling voice\n"); 1081 #endif 1082 hw->enabled = 0; 1083 hw->pending_disable = 0; 1084 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE); 1085 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1086 sc->sw.active = 0; 1087 audio_recalc_and_notify_capture (sc->cap); 1088 } 1089 continue; 1090 } 1091 1092 if (!live) { 1093 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1094 if (sw->active) { 1095 free = audio_get_free (sw); 1096 if (free > 0) { 1097 sw->callback.fn (sw->callback.opaque, free); 1098 } 1099 } 1100 } 1101 continue; 1102 } 1103 1104 prev_rpos = hw->rpos; 1105 played = hw->pcm_ops->run_out (hw, live); 1106 replay_audio_out(&played); 1107 if (audio_bug(__func__, hw->rpos >= hw->samples)) { 1108 dolog ("hw->rpos=%d hw->samples=%d played=%d\n", 1109 hw->rpos, hw->samples, played); 1110 hw->rpos = 0; 1111 } 1112 1113 #ifdef DEBUG_OUT 1114 dolog ("played=%d\n", played); 1115 #endif 1116 1117 if (played) { 1118 hw->ts_helper += played; 1119 audio_capture_mix_and_clear (hw, prev_rpos, played); 1120 } 1121 1122 cleanup_required = 0; 1123 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1124 if (!sw->active && sw->empty) { 1125 continue; 1126 } 1127 1128 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1129 dolog ("played=%d sw->total_hw_samples_mixed=%d\n", 1130 played, sw->total_hw_samples_mixed); 1131 played = sw->total_hw_samples_mixed; 1132 } 1133 1134 sw->total_hw_samples_mixed -= played; 1135 1136 if (!sw->total_hw_samples_mixed) { 1137 sw->empty = 1; 1138 cleanup_required |= !sw->active && !sw->callback.fn; 1139 } 1140 1141 if (sw->active) { 1142 free = audio_get_free (sw); 1143 if (free > 0) { 1144 sw->callback.fn (sw->callback.opaque, free); 1145 } 1146 } 1147 } 1148 1149 if (cleanup_required) { 1150 SWVoiceOut *sw1; 1151 1152 sw = hw->sw_head.lh_first; 1153 while (sw) { 1154 sw1 = sw->entries.le_next; 1155 if (!sw->active && !sw->callback.fn) { 1156 audio_close_out (sw); 1157 } 1158 sw = sw1; 1159 } 1160 } 1161 } 1162 } 1163 1164 static void audio_run_in (AudioState *s) 1165 { 1166 HWVoiceIn *hw = NULL; 1167 1168 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) { 1169 SWVoiceIn *sw; 1170 int captured = 0, min; 1171 1172 if (replay_mode != REPLAY_MODE_PLAY) { 1173 captured = hw->pcm_ops->run_in(hw); 1174 } 1175 replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples); 1176 1177 min = audio_pcm_hw_find_min_in (hw); 1178 hw->total_samples_captured += captured - min; 1179 hw->ts_helper += captured; 1180 1181 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1182 sw->total_hw_samples_acquired -= min; 1183 1184 if (sw->active) { 1185 int avail; 1186 1187 avail = audio_get_avail (sw); 1188 if (avail > 0) { 1189 sw->callback.fn (sw->callback.opaque, avail); 1190 } 1191 } 1192 } 1193 } 1194 } 1195 1196 static void audio_run_capture (AudioState *s) 1197 { 1198 CaptureVoiceOut *cap; 1199 1200 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1201 int live, rpos, captured; 1202 HWVoiceOut *hw = &cap->hw; 1203 SWVoiceOut *sw; 1204 1205 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1206 rpos = hw->rpos; 1207 while (live) { 1208 int left = hw->samples - rpos; 1209 int to_capture = audio_MIN (live, left); 1210 struct st_sample *src; 1211 struct capture_callback *cb; 1212 1213 src = hw->mix_buf + rpos; 1214 hw->clip (cap->buf, src, to_capture); 1215 mixeng_clear (src, to_capture); 1216 1217 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1218 cb->ops.capture (cb->opaque, cap->buf, 1219 to_capture << hw->info.shift); 1220 } 1221 rpos = (rpos + to_capture) % hw->samples; 1222 live -= to_capture; 1223 } 1224 hw->rpos = rpos; 1225 1226 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1227 if (!sw->active && sw->empty) { 1228 continue; 1229 } 1230 1231 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1232 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n", 1233 captured, sw->total_hw_samples_mixed); 1234 captured = sw->total_hw_samples_mixed; 1235 } 1236 1237 sw->total_hw_samples_mixed -= captured; 1238 sw->empty = sw->total_hw_samples_mixed == 0; 1239 } 1240 } 1241 } 1242 1243 void audio_run (const char *msg) 1244 { 1245 AudioState *s = &glob_audio_state; 1246 1247 audio_run_out (s); 1248 audio_run_in (s); 1249 audio_run_capture (s); 1250 #ifdef DEBUG_POLL 1251 { 1252 static double prevtime; 1253 double currtime; 1254 struct timeval tv; 1255 1256 if (gettimeofday (&tv, NULL)) { 1257 perror ("audio_run: gettimeofday"); 1258 return; 1259 } 1260 1261 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1262 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1263 prevtime = currtime; 1264 } 1265 #endif 1266 } 1267 1268 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1269 bool msg, Audiodev *dev) 1270 { 1271 s->drv_opaque = drv->init(dev); 1272 1273 if (s->drv_opaque) { 1274 audio_init_nb_voices_out (drv); 1275 audio_init_nb_voices_in (drv); 1276 s->drv = drv; 1277 return 0; 1278 } 1279 else { 1280 if (msg) { 1281 dolog("Could not init `%s' audio driver\n", drv->name); 1282 } 1283 return -1; 1284 } 1285 } 1286 1287 static void audio_vm_change_state_handler (void *opaque, int running, 1288 RunState state) 1289 { 1290 AudioState *s = opaque; 1291 HWVoiceOut *hwo = NULL; 1292 HWVoiceIn *hwi = NULL; 1293 int op = running ? VOICE_ENABLE : VOICE_DISABLE; 1294 1295 s->vm_running = running; 1296 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 1297 hwo->pcm_ops->ctl_out(hwo, op); 1298 } 1299 1300 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 1301 hwi->pcm_ops->ctl_in(hwi, op); 1302 } 1303 audio_reset_timer (s); 1304 } 1305 1306 static bool is_cleaning_up; 1307 1308 bool audio_is_cleaning_up(void) 1309 { 1310 return is_cleaning_up; 1311 } 1312 1313 void audio_cleanup(void) 1314 { 1315 AudioState *s = &glob_audio_state; 1316 HWVoiceOut *hwo, *hwon; 1317 HWVoiceIn *hwi, *hwin; 1318 1319 is_cleaning_up = true; 1320 QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) { 1321 SWVoiceCap *sc; 1322 1323 if (hwo->enabled) { 1324 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE); 1325 } 1326 hwo->pcm_ops->fini_out (hwo); 1327 1328 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1329 CaptureVoiceOut *cap = sc->cap; 1330 struct capture_callback *cb; 1331 1332 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1333 cb->ops.destroy (cb->opaque); 1334 } 1335 } 1336 QLIST_REMOVE(hwo, entries); 1337 } 1338 1339 QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) { 1340 if (hwi->enabled) { 1341 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE); 1342 } 1343 hwi->pcm_ops->fini_in (hwi); 1344 QLIST_REMOVE(hwi, entries); 1345 } 1346 1347 if (s->drv) { 1348 s->drv->fini (s->drv_opaque); 1349 s->drv = NULL; 1350 } 1351 1352 if (s->dev) { 1353 qapi_free_Audiodev(s->dev); 1354 s->dev = NULL; 1355 } 1356 } 1357 1358 static const VMStateDescription vmstate_audio = { 1359 .name = "audio", 1360 .version_id = 1, 1361 .minimum_version_id = 1, 1362 .fields = (VMStateField[]) { 1363 VMSTATE_END_OF_LIST() 1364 } 1365 }; 1366 1367 static void audio_validate_opts(Audiodev *dev, Error **errp); 1368 1369 static AudiodevListEntry *audiodev_find( 1370 AudiodevListHead *head, const char *drvname) 1371 { 1372 AudiodevListEntry *e; 1373 QSIMPLEQ_FOREACH(e, head, next) { 1374 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1375 return e; 1376 } 1377 } 1378 1379 return NULL; 1380 } 1381 1382 static int audio_init(Audiodev *dev) 1383 { 1384 size_t i; 1385 int done = 0; 1386 const char *drvname = NULL; 1387 VMChangeStateEntry *e; 1388 AudioState *s = &glob_audio_state; 1389 struct audio_driver *driver; 1390 /* silence gcc warning about uninitialized variable */ 1391 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1392 1393 if (s->drv) { 1394 if (dev) { 1395 dolog("Cannot create more than one audio backend, sorry\n"); 1396 qapi_free_Audiodev(dev); 1397 } 1398 return -1; 1399 } 1400 1401 if (dev) { 1402 /* -audiodev option */ 1403 drvname = AudiodevDriver_str(dev->driver); 1404 } else { 1405 /* legacy implicit initialization */ 1406 head = audio_handle_legacy_opts(); 1407 /* 1408 * In case of legacy initialization, all Audiodevs in the list will have 1409 * the same configuration (except the driver), so it does't matter which 1410 * one we chose. We need an Audiodev to set up AudioState before we can 1411 * init a driver. Also note that dev at this point is still in the 1412 * list. 1413 */ 1414 dev = QSIMPLEQ_FIRST(&head)->dev; 1415 audio_validate_opts(dev, &error_abort); 1416 } 1417 s->dev = dev; 1418 1419 QLIST_INIT (&s->hw_head_out); 1420 QLIST_INIT (&s->hw_head_in); 1421 QLIST_INIT (&s->cap_head); 1422 atexit(audio_cleanup); 1423 1424 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1425 1426 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1427 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1428 1429 if (s->nb_hw_voices_out <= 0) { 1430 dolog ("Bogus number of playback voices %d, setting to 1\n", 1431 s->nb_hw_voices_out); 1432 s->nb_hw_voices_out = 1; 1433 } 1434 1435 if (s->nb_hw_voices_in <= 0) { 1436 dolog ("Bogus number of capture voices %d, setting to 0\n", 1437 s->nb_hw_voices_in); 1438 s->nb_hw_voices_in = 0; 1439 } 1440 1441 if (drvname) { 1442 driver = audio_driver_lookup(drvname); 1443 if (driver) { 1444 done = !audio_driver_init(s, driver, true, dev); 1445 } else { 1446 dolog ("Unknown audio driver `%s'\n", drvname); 1447 } 1448 } else { 1449 for (i = 0; audio_prio_list[i]; i++) { 1450 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1451 driver = audio_driver_lookup(audio_prio_list[i]); 1452 1453 if (e && driver) { 1454 s->dev = dev = e->dev; 1455 audio_validate_opts(dev, &error_abort); 1456 done = !audio_driver_init(s, driver, false, dev); 1457 if (done) { 1458 e->dev = NULL; 1459 break; 1460 } 1461 } 1462 } 1463 } 1464 audio_free_audiodev_list(&head); 1465 1466 if (!done) { 1467 driver = audio_driver_lookup("none"); 1468 done = !audio_driver_init(s, driver, false, dev); 1469 assert(done); 1470 dolog("warning: Using timer based audio emulation\n"); 1471 } 1472 1473 if (dev->timer_period <= 0) { 1474 s->period_ticks = 1; 1475 } else { 1476 s->period_ticks = dev->timer_period * SCALE_US; 1477 } 1478 1479 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1480 if (!e) { 1481 dolog ("warning: Could not register change state handler\n" 1482 "(Audio can continue looping even after stopping the VM)\n"); 1483 } 1484 1485 QLIST_INIT (&s->card_head); 1486 vmstate_register (NULL, 0, &vmstate_audio, s); 1487 return 0; 1488 } 1489 1490 void audio_free_audiodev_list(AudiodevListHead *head) 1491 { 1492 AudiodevListEntry *e; 1493 while ((e = QSIMPLEQ_FIRST(head))) { 1494 QSIMPLEQ_REMOVE_HEAD(head, next); 1495 qapi_free_Audiodev(e->dev); 1496 g_free(e); 1497 } 1498 } 1499 1500 void AUD_register_card (const char *name, QEMUSoundCard *card) 1501 { 1502 audio_init(NULL); 1503 card->name = g_strdup (name); 1504 memset (&card->entries, 0, sizeof (card->entries)); 1505 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries); 1506 } 1507 1508 void AUD_remove_card (QEMUSoundCard *card) 1509 { 1510 QLIST_REMOVE (card, entries); 1511 g_free (card->name); 1512 } 1513 1514 1515 CaptureVoiceOut *AUD_add_capture ( 1516 struct audsettings *as, 1517 struct audio_capture_ops *ops, 1518 void *cb_opaque 1519 ) 1520 { 1521 AudioState *s = &glob_audio_state; 1522 CaptureVoiceOut *cap; 1523 struct capture_callback *cb; 1524 1525 if (audio_validate_settings (as)) { 1526 dolog ("Invalid settings were passed when trying to add capture\n"); 1527 audio_print_settings (as); 1528 return NULL; 1529 } 1530 1531 cb = g_malloc0(sizeof(*cb)); 1532 cb->ops = *ops; 1533 cb->opaque = cb_opaque; 1534 1535 cap = audio_pcm_capture_find_specific (as); 1536 if (cap) { 1537 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1538 return cap; 1539 } 1540 else { 1541 HWVoiceOut *hw; 1542 CaptureVoiceOut *cap; 1543 1544 cap = g_malloc0(sizeof(*cap)); 1545 1546 hw = &cap->hw; 1547 QLIST_INIT (&hw->sw_head); 1548 QLIST_INIT (&cap->cb_head); 1549 1550 /* XXX find a more elegant way */ 1551 hw->samples = 4096 * 4; 1552 hw->mix_buf = g_new0(struct st_sample, hw->samples); 1553 1554 audio_pcm_init_info (&hw->info, as); 1555 1556 cap->buf = g_malloc0_n(hw->samples, 1 << hw->info.shift); 1557 1558 hw->clip = mixeng_clip 1559 [hw->info.nchannels == 2] 1560 [hw->info.sign] 1561 [hw->info.swap_endianness] 1562 [audio_bits_to_index (hw->info.bits)]; 1563 1564 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1565 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1566 1567 QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) { 1568 audio_attach_capture (hw); 1569 } 1570 return cap; 1571 } 1572 } 1573 1574 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1575 { 1576 struct capture_callback *cb; 1577 1578 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1579 if (cb->opaque == cb_opaque) { 1580 cb->ops.destroy (cb_opaque); 1581 QLIST_REMOVE (cb, entries); 1582 g_free (cb); 1583 1584 if (!cap->cb_head.lh_first) { 1585 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1586 1587 while (sw) { 1588 SWVoiceCap *sc = (SWVoiceCap *) sw; 1589 #ifdef DEBUG_CAPTURE 1590 dolog ("freeing %s\n", sw->name); 1591 #endif 1592 1593 sw1 = sw->entries.le_next; 1594 if (sw->rate) { 1595 st_rate_stop (sw->rate); 1596 sw->rate = NULL; 1597 } 1598 QLIST_REMOVE (sw, entries); 1599 QLIST_REMOVE (sc, entries); 1600 g_free (sc); 1601 sw = sw1; 1602 } 1603 QLIST_REMOVE (cap, entries); 1604 g_free (cap->hw.mix_buf); 1605 g_free (cap->buf); 1606 g_free (cap); 1607 } 1608 return; 1609 } 1610 } 1611 } 1612 1613 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1614 { 1615 if (sw) { 1616 HWVoiceOut *hw = sw->hw; 1617 1618 sw->vol.mute = mute; 1619 sw->vol.l = nominal_volume.l * lvol / 255; 1620 sw->vol.r = nominal_volume.r * rvol / 255; 1621 1622 if (hw->pcm_ops->ctl_out) { 1623 hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw); 1624 } 1625 } 1626 } 1627 1628 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1629 { 1630 if (sw) { 1631 HWVoiceIn *hw = sw->hw; 1632 1633 sw->vol.mute = mute; 1634 sw->vol.l = nominal_volume.l * lvol / 255; 1635 sw->vol.r = nominal_volume.r * rvol / 255; 1636 1637 if (hw->pcm_ops->ctl_in) { 1638 hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw); 1639 } 1640 } 1641 } 1642 1643 void audio_create_pdos(Audiodev *dev) 1644 { 1645 switch (dev->driver) { 1646 #define CASE(DRIVER, driver, pdo_name) \ 1647 case AUDIODEV_DRIVER_##DRIVER: \ 1648 if (!dev->u.driver.has_in) { \ 1649 dev->u.driver.in = g_malloc0( \ 1650 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1651 dev->u.driver.has_in = true; \ 1652 } \ 1653 if (!dev->u.driver.has_out) { \ 1654 dev->u.driver.out = g_malloc0( \ 1655 sizeof(AudiodevAlsaPerDirectionOptions)); \ 1656 dev->u.driver.has_out = true; \ 1657 } \ 1658 break 1659 1660 CASE(NONE, none, ); 1661 CASE(ALSA, alsa, Alsa); 1662 CASE(COREAUDIO, coreaudio, Coreaudio); 1663 CASE(DSOUND, dsound, ); 1664 CASE(OSS, oss, Oss); 1665 CASE(PA, pa, Pa); 1666 CASE(SDL, sdl, ); 1667 CASE(SPICE, spice, ); 1668 CASE(WAV, wav, ); 1669 1670 case AUDIODEV_DRIVER__MAX: 1671 abort(); 1672 }; 1673 } 1674 1675 static void audio_validate_per_direction_opts( 1676 AudiodevPerDirectionOptions *pdo, Error **errp) 1677 { 1678 if (!pdo->has_fixed_settings) { 1679 pdo->has_fixed_settings = true; 1680 pdo->fixed_settings = true; 1681 } 1682 if (!pdo->fixed_settings && 1683 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1684 error_setg(errp, 1685 "You can't use frequency, channels or format with fixed-settings=off"); 1686 return; 1687 } 1688 1689 if (!pdo->has_frequency) { 1690 pdo->has_frequency = true; 1691 pdo->frequency = 44100; 1692 } 1693 if (!pdo->has_channels) { 1694 pdo->has_channels = true; 1695 pdo->channels = 2; 1696 } 1697 if (!pdo->has_voices) { 1698 pdo->has_voices = true; 1699 pdo->voices = 1; 1700 } 1701 if (!pdo->has_format) { 1702 pdo->has_format = true; 1703 pdo->format = AUDIO_FORMAT_S16; 1704 } 1705 } 1706 1707 static void audio_validate_opts(Audiodev *dev, Error **errp) 1708 { 1709 Error *err = NULL; 1710 1711 audio_create_pdos(dev); 1712 1713 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 1714 if (err) { 1715 error_propagate(errp, err); 1716 return; 1717 } 1718 1719 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 1720 if (err) { 1721 error_propagate(errp, err); 1722 return; 1723 } 1724 1725 if (!dev->has_timer_period) { 1726 dev->has_timer_period = true; 1727 dev->timer_period = 10000; /* 100Hz -> 10ms */ 1728 } 1729 } 1730 1731 void audio_parse_option(const char *opt) 1732 { 1733 AudiodevListEntry *e; 1734 Audiodev *dev = NULL; 1735 1736 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 1737 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 1738 visit_free(v); 1739 1740 audio_validate_opts(dev, &error_fatal); 1741 1742 e = g_malloc0(sizeof(AudiodevListEntry)); 1743 e->dev = dev; 1744 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 1745 } 1746 1747 void audio_init_audiodevs(void) 1748 { 1749 AudiodevListEntry *e; 1750 1751 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 1752 audio_init(e->dev); 1753 } 1754 } 1755 1756 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 1757 { 1758 return (audsettings) { 1759 .freq = pdo->frequency, 1760 .nchannels = pdo->channels, 1761 .fmt = pdo->format, 1762 .endianness = AUDIO_HOST_ENDIANNESS, 1763 }; 1764 } 1765 1766 int audioformat_bytes_per_sample(AudioFormat fmt) 1767 { 1768 switch (fmt) { 1769 case AUDIO_FORMAT_U8: 1770 case AUDIO_FORMAT_S8: 1771 return 1; 1772 1773 case AUDIO_FORMAT_U16: 1774 case AUDIO_FORMAT_S16: 1775 return 2; 1776 1777 case AUDIO_FORMAT_U32: 1778 case AUDIO_FORMAT_S32: 1779 return 4; 1780 1781 case AUDIO_FORMAT__MAX: 1782 ; 1783 } 1784 abort(); 1785 } 1786 1787 1788 /* frames = freq * usec / 1e6 */ 1789 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 1790 audsettings *as, int def_usecs) 1791 { 1792 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 1793 return (as->freq * usecs + 500000) / 1000000; 1794 } 1795 1796 /* samples = channels * frames = channels * freq * usec / 1e6 */ 1797 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 1798 audsettings *as, int def_usecs) 1799 { 1800 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 1801 } 1802 1803 /* 1804 * bytes = bytes_per_sample * samples = 1805 * bytes_per_sample * channels * freq * usec / 1e6 1806 */ 1807 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 1808 audsettings *as, int def_usecs) 1809 { 1810 return audio_buffer_samples(pdo, as, def_usecs) * 1811 audioformat_bytes_per_sample(as->fmt); 1812 } 1813