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 #include "qemu/osdep.h" 25 #include "hw/hw.h" 26 #include "audio.h" 27 #include "monitor/monitor.h" 28 #include "qemu/timer.h" 29 #include "qapi/error.h" 30 #include "qapi/qobject-input-visitor.h" 31 #include "qapi/qapi-visit-audio.h" 32 #include "sysemu/sysemu.h" 33 #include "qemu/cutils.h" 34 #include "sysemu/replay.h" 35 #include "trace.h" 36 37 #define AUDIO_CAP "audio" 38 #include "audio_int.h" 39 40 /* #define DEBUG_LIVE */ 41 /* #define DEBUG_OUT */ 42 /* #define DEBUG_CAPTURE */ 43 /* #define DEBUG_POLL */ 44 45 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 46 47 48 /* Order of CONFIG_AUDIO_DRIVERS is import. 49 The 1st one is the one used by default, that is the reason 50 that we generate the list. 51 */ 52 const char *audio_prio_list[] = { 53 "spice", 54 CONFIG_AUDIO_DRIVERS 55 "none", 56 "wav", 57 NULL 58 }; 59 60 static QLIST_HEAD(, audio_driver) audio_drivers; 61 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 62 63 void audio_driver_register(audio_driver *drv) 64 { 65 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 66 } 67 68 audio_driver *audio_driver_lookup(const char *name) 69 { 70 struct audio_driver *d; 71 72 QLIST_FOREACH(d, &audio_drivers, next) { 73 if (strcmp(name, d->name) == 0) { 74 return d; 75 } 76 } 77 78 audio_module_load_one(name); 79 QLIST_FOREACH(d, &audio_drivers, next) { 80 if (strcmp(name, d->name) == 0) { 81 return d; 82 } 83 } 84 85 return NULL; 86 } 87 88 static AudioState glob_audio_state; 89 90 const struct mixeng_volume nominal_volume = { 91 .mute = 0, 92 #ifdef FLOAT_MIXENG 93 .r = 1.0, 94 .l = 1.0, 95 #else 96 .r = 1ULL << 32, 97 .l = 1ULL << 32, 98 #endif 99 }; 100 101 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED 102 #error No its not 103 #else 104 int audio_bug (const char *funcname, int cond) 105 { 106 if (cond) { 107 static int shown; 108 109 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 110 if (!shown) { 111 shown = 1; 112 AUD_log (NULL, "Save all your work and restart without audio\n"); 113 AUD_log (NULL, "I am sorry\n"); 114 } 115 AUD_log (NULL, "Context:\n"); 116 117 #if defined AUDIO_BREAKPOINT_ON_BUG 118 # if defined HOST_I386 119 # if defined __GNUC__ 120 __asm__ ("int3"); 121 # elif defined _MSC_VER 122 _asm _emit 0xcc; 123 # else 124 abort (); 125 # endif 126 # else 127 abort (); 128 # endif 129 #endif 130 } 131 132 return cond; 133 } 134 #endif 135 136 static inline int audio_bits_to_index (int bits) 137 { 138 switch (bits) { 139 case 8: 140 return 0; 141 142 case 16: 143 return 1; 144 145 case 32: 146 return 2; 147 148 default: 149 audio_bug ("bits_to_index", 1); 150 AUD_log (NULL, "invalid bits %d\n", bits); 151 return 0; 152 } 153 } 154 155 void *audio_calloc (const char *funcname, int nmemb, size_t size) 156 { 157 int cond; 158 size_t len; 159 160 len = nmemb * size; 161 cond = !nmemb || !size; 162 cond |= nmemb < 0; 163 cond |= len < size; 164 165 if (audio_bug ("audio_calloc", cond)) { 166 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 167 funcname); 168 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 169 return NULL; 170 } 171 172 return g_malloc0 (len); 173 } 174 175 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 176 { 177 if (cap) { 178 fprintf(stderr, "%s: ", cap); 179 } 180 181 vfprintf(stderr, fmt, ap); 182 } 183 184 void AUD_log (const char *cap, const char *fmt, ...) 185 { 186 va_list ap; 187 188 va_start (ap, fmt); 189 AUD_vlog (cap, fmt, ap); 190 va_end (ap); 191 } 192 193 static void audio_print_settings (struct audsettings *as) 194 { 195 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 196 197 switch (as->fmt) { 198 case AUDIO_FORMAT_S8: 199 AUD_log (NULL, "S8"); 200 break; 201 case AUDIO_FORMAT_U8: 202 AUD_log (NULL, "U8"); 203 break; 204 case AUDIO_FORMAT_S16: 205 AUD_log (NULL, "S16"); 206 break; 207 case AUDIO_FORMAT_U16: 208 AUD_log (NULL, "U16"); 209 break; 210 case AUDIO_FORMAT_S32: 211 AUD_log (NULL, "S32"); 212 break; 213 case AUDIO_FORMAT_U32: 214 AUD_log (NULL, "U32"); 215 break; 216 default: 217 AUD_log (NULL, "invalid(%d)", as->fmt); 218 break; 219 } 220 221 AUD_log (NULL, " endianness="); 222 switch (as->endianness) { 223 case 0: 224 AUD_log (NULL, "little"); 225 break; 226 case 1: 227 AUD_log (NULL, "big"); 228 break; 229 default: 230 AUD_log (NULL, "invalid"); 231 break; 232 } 233 AUD_log (NULL, "\n"); 234 } 235 236 static int audio_validate_settings (struct audsettings *as) 237 { 238 int invalid; 239 240 invalid = as->nchannels != 1 && as->nchannels != 2; 241 invalid |= as->endianness != 0 && as->endianness != 1; 242 243 switch (as->fmt) { 244 case AUDIO_FORMAT_S8: 245 case AUDIO_FORMAT_U8: 246 case AUDIO_FORMAT_S16: 247 case AUDIO_FORMAT_U16: 248 case AUDIO_FORMAT_S32: 249 case AUDIO_FORMAT_U32: 250 break; 251 default: 252 invalid = 1; 253 break; 254 } 255 256 invalid |= as->freq <= 0; 257 return invalid ? -1 : 0; 258 } 259 260 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 261 { 262 int bits = 8, sign = 0; 263 264 switch (as->fmt) { 265 case AUDIO_FORMAT_S8: 266 sign = 1; 267 /* fall through */ 268 case AUDIO_FORMAT_U8: 269 break; 270 271 case AUDIO_FORMAT_S16: 272 sign = 1; 273 /* fall through */ 274 case AUDIO_FORMAT_U16: 275 bits = 16; 276 break; 277 278 case AUDIO_FORMAT_S32: 279 sign = 1; 280 /* fall through */ 281 case AUDIO_FORMAT_U32: 282 bits = 32; 283 break; 284 285 default: 286 abort(); 287 } 288 return info->freq == as->freq 289 && info->nchannels == as->nchannels 290 && info->sign == sign 291 && info->bits == bits 292 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 293 } 294 295 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 296 { 297 int bits = 8, sign = 0, shift = 0; 298 299 switch (as->fmt) { 300 case AUDIO_FORMAT_S8: 301 sign = 1; 302 case AUDIO_FORMAT_U8: 303 break; 304 305 case AUDIO_FORMAT_S16: 306 sign = 1; 307 case AUDIO_FORMAT_U16: 308 bits = 16; 309 shift = 1; 310 break; 311 312 case AUDIO_FORMAT_S32: 313 sign = 1; 314 case AUDIO_FORMAT_U32: 315 bits = 32; 316 shift = 2; 317 break; 318 319 default: 320 abort(); 321 } 322 323 info->freq = as->freq; 324 info->bits = bits; 325 info->sign = sign; 326 info->nchannels = as->nchannels; 327 info->shift = (as->nchannels == 2) + shift; 328 info->align = (1 << info->shift) - 1; 329 info->bytes_per_second = info->freq << info->shift; 330 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 331 } 332 333 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 334 { 335 if (!len) { 336 return; 337 } 338 339 if (info->sign) { 340 memset (buf, 0x00, len << info->shift); 341 } 342 else { 343 switch (info->bits) { 344 case 8: 345 memset (buf, 0x80, len << info->shift); 346 break; 347 348 case 16: 349 { 350 int i; 351 uint16_t *p = buf; 352 int shift = info->nchannels - 1; 353 short s = INT16_MAX; 354 355 if (info->swap_endianness) { 356 s = bswap16 (s); 357 } 358 359 for (i = 0; i < len << shift; i++) { 360 p[i] = s; 361 } 362 } 363 break; 364 365 case 32: 366 { 367 int i; 368 uint32_t *p = buf; 369 int shift = info->nchannels - 1; 370 int32_t s = INT32_MAX; 371 372 if (info->swap_endianness) { 373 s = bswap32 (s); 374 } 375 376 for (i = 0; i < len << shift; i++) { 377 p[i] = s; 378 } 379 } 380 break; 381 382 default: 383 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 384 info->bits); 385 break; 386 } 387 } 388 } 389 390 /* 391 * Capture 392 */ 393 static void noop_conv (struct st_sample *dst, const void *src, int samples) 394 { 395 (void) src; 396 (void) dst; 397 (void) samples; 398 } 399 400 static CaptureVoiceOut *audio_pcm_capture_find_specific ( 401 struct audsettings *as 402 ) 403 { 404 CaptureVoiceOut *cap; 405 AudioState *s = &glob_audio_state; 406 407 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 408 if (audio_pcm_info_eq (&cap->hw.info, as)) { 409 return cap; 410 } 411 } 412 return NULL; 413 } 414 415 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 416 { 417 struct capture_callback *cb; 418 419 #ifdef DEBUG_CAPTURE 420 dolog ("notification %d sent\n", cmd); 421 #endif 422 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 423 cb->ops.notify (cb->opaque, cmd); 424 } 425 } 426 427 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 428 { 429 if (cap->hw.enabled != enabled) { 430 audcnotification_e cmd; 431 cap->hw.enabled = enabled; 432 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 433 audio_notify_capture (cap, cmd); 434 } 435 } 436 437 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 438 { 439 HWVoiceOut *hw = &cap->hw; 440 SWVoiceOut *sw; 441 int enabled = 0; 442 443 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 444 if (sw->active) { 445 enabled = 1; 446 break; 447 } 448 } 449 audio_capture_maybe_changed (cap, enabled); 450 } 451 452 static void audio_detach_capture (HWVoiceOut *hw) 453 { 454 SWVoiceCap *sc = hw->cap_head.lh_first; 455 456 while (sc) { 457 SWVoiceCap *sc1 = sc->entries.le_next; 458 SWVoiceOut *sw = &sc->sw; 459 CaptureVoiceOut *cap = sc->cap; 460 int was_active = sw->active; 461 462 if (sw->rate) { 463 st_rate_stop (sw->rate); 464 sw->rate = NULL; 465 } 466 467 QLIST_REMOVE (sw, entries); 468 QLIST_REMOVE (sc, entries); 469 g_free (sc); 470 if (was_active) { 471 /* We have removed soft voice from the capture: 472 this might have changed the overall status of the capture 473 since this might have been the only active voice */ 474 audio_recalc_and_notify_capture (cap); 475 } 476 sc = sc1; 477 } 478 } 479 480 static int audio_attach_capture (HWVoiceOut *hw) 481 { 482 AudioState *s = &glob_audio_state; 483 CaptureVoiceOut *cap; 484 485 audio_detach_capture (hw); 486 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 487 SWVoiceCap *sc; 488 SWVoiceOut *sw; 489 HWVoiceOut *hw_cap = &cap->hw; 490 491 sc = g_malloc0(sizeof(*sc)); 492 493 sc->cap = cap; 494 sw = &sc->sw; 495 sw->hw = hw_cap; 496 sw->info = hw->info; 497 sw->empty = 1; 498 sw->active = hw->enabled; 499 sw->conv = noop_conv; 500 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 501 sw->vol = nominal_volume; 502 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 503 if (!sw->rate) { 504 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 505 g_free (sw); 506 return -1; 507 } 508 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 509 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 510 #ifdef DEBUG_CAPTURE 511 sw->name = g_strdup_printf ("for %p %d,%d,%d", 512 hw, sw->info.freq, sw->info.bits, 513 sw->info.nchannels); 514 dolog ("Added %s active = %d\n", sw->name, sw->active); 515 #endif 516 if (sw->active) { 517 audio_capture_maybe_changed (cap, 1); 518 } 519 } 520 return 0; 521 } 522 523 /* 524 * Hard voice (capture) 525 */ 526 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw) 527 { 528 SWVoiceIn *sw; 529 int m = hw->total_samples_captured; 530 531 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 532 if (sw->active) { 533 m = audio_MIN (m, sw->total_hw_samples_acquired); 534 } 535 } 536 return m; 537 } 538 539 int audio_pcm_hw_get_live_in (HWVoiceIn *hw) 540 { 541 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 542 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 543 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 544 return 0; 545 } 546 return live; 547 } 548 549 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf, 550 int live, int pending) 551 { 552 int left = hw->samples - pending; 553 int len = audio_MIN (left, live); 554 int clipped = 0; 555 556 while (len) { 557 struct st_sample *src = hw->mix_buf + hw->rpos; 558 uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift); 559 int samples_till_end_of_buf = hw->samples - hw->rpos; 560 int samples_to_clip = audio_MIN (len, samples_till_end_of_buf); 561 562 hw->clip (dst, src, samples_to_clip); 563 564 hw->rpos = (hw->rpos + samples_to_clip) % hw->samples; 565 len -= samples_to_clip; 566 clipped += samples_to_clip; 567 } 568 return clipped; 569 } 570 571 /* 572 * Soft voice (capture) 573 */ 574 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw) 575 { 576 HWVoiceIn *hw = sw->hw; 577 int live = hw->total_samples_captured - sw->total_hw_samples_acquired; 578 int rpos; 579 580 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 581 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 582 return 0; 583 } 584 585 rpos = hw->wpos - live; 586 if (rpos >= 0) { 587 return rpos; 588 } 589 else { 590 return hw->samples + rpos; 591 } 592 } 593 594 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size) 595 { 596 HWVoiceIn *hw = sw->hw; 597 int 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->samples; 601 602 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 603 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 604 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples); 605 return 0; 606 } 607 608 samples = size >> sw->info.shift; 609 if (!live) { 610 return 0; 611 } 612 613 swlim = (live * sw->ratio) >> 32; 614 swlim = audio_MIN (swlim, samples); 615 616 while (swlim) { 617 src = hw->conv_buf + rpos; 618 isamp = hw->wpos - rpos; 619 /* XXX: <= ? */ 620 if (isamp <= 0) { 621 isamp = hw->samples - rpos; 622 } 623 624 if (!isamp) { 625 break; 626 } 627 osamp = swlim; 628 629 if (audio_bug(__func__, osamp < 0)) { 630 dolog ("osamp=%d\n", osamp); 631 return 0; 632 } 633 634 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 635 swlim -= osamp; 636 rpos = (rpos + isamp) % hw->samples; 637 dst += osamp; 638 ret += osamp; 639 total += isamp; 640 } 641 642 if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) { 643 mixeng_volume (sw->buf, ret, &sw->vol); 644 } 645 646 sw->clip (buf, sw->buf, ret); 647 sw->total_hw_samples_acquired += total; 648 return ret << sw->info.shift; 649 } 650 651 /* 652 * Hard voice (playback) 653 */ 654 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 655 { 656 SWVoiceOut *sw; 657 int m = INT_MAX; 658 int nb_live = 0; 659 660 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 661 if (sw->active || !sw->empty) { 662 m = audio_MIN (m, sw->total_hw_samples_mixed); 663 nb_live += 1; 664 } 665 } 666 667 *nb_livep = nb_live; 668 return m; 669 } 670 671 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 672 { 673 int smin; 674 int nb_live1; 675 676 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 677 if (nb_live) { 678 *nb_live = nb_live1; 679 } 680 681 if (nb_live1) { 682 int live = smin; 683 684 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 685 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 686 return 0; 687 } 688 return live; 689 } 690 return 0; 691 } 692 693 /* 694 * Soft voice (playback) 695 */ 696 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size) 697 { 698 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 699 int ret = 0, pos = 0, total = 0; 700 701 if (!sw) { 702 return size; 703 } 704 705 hwsamples = sw->hw->samples; 706 707 live = sw->total_hw_samples_mixed; 708 if (audio_bug(__func__, live < 0 || live > hwsamples)) { 709 dolog ("live=%d hw->samples=%d\n", live, hwsamples); 710 return 0; 711 } 712 713 if (live == hwsamples) { 714 #ifdef DEBUG_OUT 715 dolog ("%s is full %d\n", sw->name, live); 716 #endif 717 return 0; 718 } 719 720 wpos = (sw->hw->rpos + live) % hwsamples; 721 samples = size >> sw->info.shift; 722 723 dead = hwsamples - live; 724 swlim = ((int64_t) dead << 32) / sw->ratio; 725 swlim = audio_MIN (swlim, samples); 726 if (swlim) { 727 sw->conv (sw->buf, buf, swlim); 728 729 if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) { 730 mixeng_volume (sw->buf, swlim, &sw->vol); 731 } 732 } 733 734 while (swlim) { 735 dead = hwsamples - live; 736 left = hwsamples - wpos; 737 blck = audio_MIN (dead, left); 738 if (!blck) { 739 break; 740 } 741 isamp = swlim; 742 osamp = blck; 743 st_rate_flow_mix ( 744 sw->rate, 745 sw->buf + pos, 746 sw->hw->mix_buf + wpos, 747 &isamp, 748 &osamp 749 ); 750 ret += isamp; 751 swlim -= isamp; 752 pos += isamp; 753 live += osamp; 754 wpos = (wpos + osamp) % hwsamples; 755 total += osamp; 756 } 757 758 sw->total_hw_samples_mixed += total; 759 sw->empty = sw->total_hw_samples_mixed == 0; 760 761 #ifdef DEBUG_OUT 762 dolog ( 763 "%s: write size %d ret %d total sw %d\n", 764 SW_NAME (sw), 765 size >> sw->info.shift, 766 ret, 767 sw->total_hw_samples_mixed 768 ); 769 #endif 770 771 return ret << sw->info.shift; 772 } 773 774 #ifdef DEBUG_AUDIO 775 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 776 { 777 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n", 778 cap, info->bits, info->sign, info->freq, info->nchannels); 779 } 780 #endif 781 782 #define DAC 783 #include "audio_template.h" 784 #undef DAC 785 #include "audio_template.h" 786 787 /* 788 * Timer 789 */ 790 791 static bool audio_timer_running; 792 static uint64_t audio_timer_last; 793 794 static int audio_is_timer_needed (void) 795 { 796 HWVoiceIn *hwi = NULL; 797 HWVoiceOut *hwo = NULL; 798 799 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 800 if (!hwo->poll_mode) return 1; 801 } 802 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 803 if (!hwi->poll_mode) return 1; 804 } 805 return 0; 806 } 807 808 static void audio_reset_timer (AudioState *s) 809 { 810 if (audio_is_timer_needed ()) { 811 timer_mod_anticipate_ns(s->ts, 812 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 813 if (!audio_timer_running) { 814 audio_timer_running = true; 815 audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 816 trace_audio_timer_start(s->period_ticks / SCALE_MS); 817 } 818 } else { 819 timer_del(s->ts); 820 if (audio_timer_running) { 821 audio_timer_running = false; 822 trace_audio_timer_stop(); 823 } 824 } 825 } 826 827 static void audio_timer (void *opaque) 828 { 829 int64_t now, diff; 830 AudioState *s = opaque; 831 832 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 833 diff = now - audio_timer_last; 834 if (diff > s->period_ticks * 3 / 2) { 835 trace_audio_timer_delayed(diff / SCALE_MS); 836 } 837 audio_timer_last = now; 838 839 audio_run("timer"); 840 audio_reset_timer(s); 841 } 842 843 /* 844 * Public API 845 */ 846 int AUD_write (SWVoiceOut *sw, void *buf, int size) 847 { 848 if (!sw) { 849 /* XXX: Consider options */ 850 return size; 851 } 852 853 if (!sw->hw->enabled) { 854 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 855 return 0; 856 } 857 858 return sw->hw->pcm_ops->write(sw, buf, size); 859 } 860 861 int AUD_read (SWVoiceIn *sw, void *buf, int size) 862 { 863 if (!sw) { 864 /* XXX: Consider options */ 865 return size; 866 } 867 868 if (!sw->hw->enabled) { 869 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 870 return 0; 871 } 872 873 return sw->hw->pcm_ops->read(sw, buf, size); 874 } 875 876 int AUD_get_buffer_size_out (SWVoiceOut *sw) 877 { 878 return sw->hw->samples << sw->hw->info.shift; 879 } 880 881 void AUD_set_active_out (SWVoiceOut *sw, int on) 882 { 883 HWVoiceOut *hw; 884 885 if (!sw) { 886 return; 887 } 888 889 hw = sw->hw; 890 if (sw->active != on) { 891 AudioState *s = &glob_audio_state; 892 SWVoiceOut *temp_sw; 893 SWVoiceCap *sc; 894 895 if (on) { 896 hw->pending_disable = 0; 897 if (!hw->enabled) { 898 hw->enabled = 1; 899 if (s->vm_running) { 900 hw->pcm_ops->ctl_out(hw, VOICE_ENABLE); 901 audio_reset_timer (s); 902 } 903 } 904 } 905 else { 906 if (hw->enabled) { 907 int nb_active = 0; 908 909 for (temp_sw = hw->sw_head.lh_first; temp_sw; 910 temp_sw = temp_sw->entries.le_next) { 911 nb_active += temp_sw->active != 0; 912 } 913 914 hw->pending_disable = nb_active == 1; 915 } 916 } 917 918 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 919 sc->sw.active = hw->enabled; 920 if (hw->enabled) { 921 audio_capture_maybe_changed (sc->cap, 1); 922 } 923 } 924 sw->active = on; 925 } 926 } 927 928 void AUD_set_active_in (SWVoiceIn *sw, int on) 929 { 930 HWVoiceIn *hw; 931 932 if (!sw) { 933 return; 934 } 935 936 hw = sw->hw; 937 if (sw->active != on) { 938 AudioState *s = &glob_audio_state; 939 SWVoiceIn *temp_sw; 940 941 if (on) { 942 if (!hw->enabled) { 943 hw->enabled = 1; 944 if (s->vm_running) { 945 hw->pcm_ops->ctl_in(hw, VOICE_ENABLE); 946 audio_reset_timer (s); 947 } 948 } 949 sw->total_hw_samples_acquired = hw->total_samples_captured; 950 } 951 else { 952 if (hw->enabled) { 953 int nb_active = 0; 954 955 for (temp_sw = hw->sw_head.lh_first; temp_sw; 956 temp_sw = temp_sw->entries.le_next) { 957 nb_active += temp_sw->active != 0; 958 } 959 960 if (nb_active == 1) { 961 hw->enabled = 0; 962 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE); 963 } 964 } 965 } 966 sw->active = on; 967 } 968 } 969 970 static int audio_get_avail (SWVoiceIn *sw) 971 { 972 int live; 973 974 if (!sw) { 975 return 0; 976 } 977 978 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 979 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 980 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 981 return 0; 982 } 983 984 ldebug ( 985 "%s: get_avail live %d ret %" PRId64 "\n", 986 SW_NAME (sw), 987 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift 988 ); 989 990 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift; 991 } 992 993 static int audio_get_free (SWVoiceOut *sw) 994 { 995 int live, dead; 996 997 if (!sw) { 998 return 0; 999 } 1000 1001 live = sw->total_hw_samples_mixed; 1002 1003 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) { 1004 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples); 1005 return 0; 1006 } 1007 1008 dead = sw->hw->samples - live; 1009 1010 #ifdef DEBUG_OUT 1011 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1012 SW_NAME (sw), 1013 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift); 1014 #endif 1015 1016 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift; 1017 } 1018 1019 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples) 1020 { 1021 int n; 1022 1023 if (hw->enabled) { 1024 SWVoiceCap *sc; 1025 1026 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1027 SWVoiceOut *sw = &sc->sw; 1028 int rpos2 = rpos; 1029 1030 n = samples; 1031 while (n) { 1032 int till_end_of_hw = hw->samples - rpos2; 1033 int to_write = audio_MIN (till_end_of_hw, n); 1034 int bytes = to_write << hw->info.shift; 1035 int written; 1036 1037 sw->buf = hw->mix_buf + rpos2; 1038 written = audio_pcm_sw_write (sw, NULL, bytes); 1039 if (written - bytes) { 1040 dolog ("Could not mix %d bytes into a capture " 1041 "buffer, mixed %d\n", 1042 bytes, written); 1043 break; 1044 } 1045 n -= to_write; 1046 rpos2 = (rpos2 + to_write) % hw->samples; 1047 } 1048 } 1049 } 1050 1051 n = audio_MIN (samples, hw->samples - rpos); 1052 mixeng_clear (hw->mix_buf + rpos, n); 1053 mixeng_clear (hw->mix_buf, samples - n); 1054 } 1055 1056 static void audio_run_out (AudioState *s) 1057 { 1058 HWVoiceOut *hw = NULL; 1059 SWVoiceOut *sw; 1060 1061 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) { 1062 int played; 1063 int live, free, nb_live, cleanup_required, prev_rpos; 1064 1065 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1066 if (!nb_live) { 1067 live = 0; 1068 } 1069 1070 if (audio_bug(__func__, live < 0 || live > hw->samples)) { 1071 dolog ("live=%d hw->samples=%d\n", live, hw->samples); 1072 continue; 1073 } 1074 1075 if (hw->pending_disable && !nb_live) { 1076 SWVoiceCap *sc; 1077 #ifdef DEBUG_OUT 1078 dolog ("Disabling voice\n"); 1079 #endif 1080 hw->enabled = 0; 1081 hw->pending_disable = 0; 1082 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE); 1083 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1084 sc->sw.active = 0; 1085 audio_recalc_and_notify_capture (sc->cap); 1086 } 1087 continue; 1088 } 1089 1090 if (!live) { 1091 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1092 if (sw->active) { 1093 free = audio_get_free (sw); 1094 if (free > 0) { 1095 sw->callback.fn (sw->callback.opaque, free); 1096 } 1097 } 1098 } 1099 continue; 1100 } 1101 1102 prev_rpos = hw->rpos; 1103 played = hw->pcm_ops->run_out (hw, live); 1104 replay_audio_out(&played); 1105 if (audio_bug(__func__, hw->rpos >= hw->samples)) { 1106 dolog ("hw->rpos=%d hw->samples=%d played=%d\n", 1107 hw->rpos, hw->samples, played); 1108 hw->rpos = 0; 1109 } 1110 1111 #ifdef DEBUG_OUT 1112 dolog ("played=%d\n", played); 1113 #endif 1114 1115 if (played) { 1116 hw->ts_helper += played; 1117 audio_capture_mix_and_clear (hw, prev_rpos, played); 1118 } 1119 1120 cleanup_required = 0; 1121 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1122 if (!sw->active && sw->empty) { 1123 continue; 1124 } 1125 1126 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1127 dolog ("played=%d sw->total_hw_samples_mixed=%d\n", 1128 played, sw->total_hw_samples_mixed); 1129 played = sw->total_hw_samples_mixed; 1130 } 1131 1132 sw->total_hw_samples_mixed -= played; 1133 1134 if (!sw->total_hw_samples_mixed) { 1135 sw->empty = 1; 1136 cleanup_required |= !sw->active && !sw->callback.fn; 1137 } 1138 1139 if (sw->active) { 1140 free = audio_get_free (sw); 1141 if (free > 0) { 1142 sw->callback.fn (sw->callback.opaque, free); 1143 } 1144 } 1145 } 1146 1147 if (cleanup_required) { 1148 SWVoiceOut *sw1; 1149 1150 sw = hw->sw_head.lh_first; 1151 while (sw) { 1152 sw1 = sw->entries.le_next; 1153 if (!sw->active && !sw->callback.fn) { 1154 audio_close_out (sw); 1155 } 1156 sw = sw1; 1157 } 1158 } 1159 } 1160 } 1161 1162 static void audio_run_in (AudioState *s) 1163 { 1164 HWVoiceIn *hw = NULL; 1165 1166 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) { 1167 SWVoiceIn *sw; 1168 int captured = 0, min; 1169 1170 if (replay_mode != REPLAY_MODE_PLAY) { 1171 captured = hw->pcm_ops->run_in(hw); 1172 } 1173 replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples); 1174 1175 min = audio_pcm_hw_find_min_in (hw); 1176 hw->total_samples_captured += captured - min; 1177 hw->ts_helper += captured; 1178 1179 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1180 sw->total_hw_samples_acquired -= min; 1181 1182 if (sw->active) { 1183 int avail; 1184 1185 avail = audio_get_avail (sw); 1186 if (avail > 0) { 1187 sw->callback.fn (sw->callback.opaque, avail); 1188 } 1189 } 1190 } 1191 } 1192 } 1193 1194 static void audio_run_capture (AudioState *s) 1195 { 1196 CaptureVoiceOut *cap; 1197 1198 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1199 int live, rpos, captured; 1200 HWVoiceOut *hw = &cap->hw; 1201 SWVoiceOut *sw; 1202 1203 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1204 rpos = hw->rpos; 1205 while (live) { 1206 int left = hw->samples - rpos; 1207 int to_capture = audio_MIN (live, left); 1208 struct st_sample *src; 1209 struct capture_callback *cb; 1210 1211 src = hw->mix_buf + rpos; 1212 hw->clip (cap->buf, src, to_capture); 1213 mixeng_clear (src, to_capture); 1214 1215 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1216 cb->ops.capture (cb->opaque, cap->buf, 1217 to_capture << hw->info.shift); 1218 } 1219 rpos = (rpos + to_capture) % hw->samples; 1220 live -= to_capture; 1221 } 1222 hw->rpos = rpos; 1223 1224 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1225 if (!sw->active && sw->empty) { 1226 continue; 1227 } 1228 1229 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1230 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n", 1231 captured, sw->total_hw_samples_mixed); 1232 captured = sw->total_hw_samples_mixed; 1233 } 1234 1235 sw->total_hw_samples_mixed -= captured; 1236 sw->empty = sw->total_hw_samples_mixed == 0; 1237 } 1238 } 1239 } 1240 1241 void audio_run (const char *msg) 1242 { 1243 AudioState *s = &glob_audio_state; 1244 1245 audio_run_out (s); 1246 audio_run_in (s); 1247 audio_run_capture (s); 1248 #ifdef DEBUG_POLL 1249 { 1250 static double prevtime; 1251 double currtime; 1252 struct timeval tv; 1253 1254 if (gettimeofday (&tv, NULL)) { 1255 perror ("audio_run: gettimeofday"); 1256 return; 1257 } 1258 1259 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1260 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1261 prevtime = currtime; 1262 } 1263 #endif 1264 } 1265 1266 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1267 bool msg, Audiodev *dev) 1268 { 1269 s->drv_opaque = drv->init(dev); 1270 1271 if (s->drv_opaque) { 1272 audio_init_nb_voices_out (drv); 1273 audio_init_nb_voices_in (drv); 1274 s->drv = drv; 1275 return 0; 1276 } 1277 else { 1278 if (msg) { 1279 dolog("Could not init `%s' audio driver\n", drv->name); 1280 } 1281 return -1; 1282 } 1283 } 1284 1285 static void audio_vm_change_state_handler (void *opaque, int running, 1286 RunState state) 1287 { 1288 AudioState *s = opaque; 1289 HWVoiceOut *hwo = NULL; 1290 HWVoiceIn *hwi = NULL; 1291 int op = running ? VOICE_ENABLE : VOICE_DISABLE; 1292 1293 s->vm_running = running; 1294 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) { 1295 hwo->pcm_ops->ctl_out(hwo, op); 1296 } 1297 1298 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) { 1299 hwi->pcm_ops->ctl_in(hwi, op); 1300 } 1301 audio_reset_timer (s); 1302 } 1303 1304 static bool is_cleaning_up; 1305 1306 bool audio_is_cleaning_up(void) 1307 { 1308 return is_cleaning_up; 1309 } 1310 1311 void audio_cleanup(void) 1312 { 1313 AudioState *s = &glob_audio_state; 1314 HWVoiceOut *hwo, *hwon; 1315 HWVoiceIn *hwi, *hwin; 1316 1317 is_cleaning_up = true; 1318 QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) { 1319 SWVoiceCap *sc; 1320 1321 if (hwo->enabled) { 1322 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE); 1323 } 1324 hwo->pcm_ops->fini_out (hwo); 1325 1326 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1327 CaptureVoiceOut *cap = sc->cap; 1328 struct capture_callback *cb; 1329 1330 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1331 cb->ops.destroy (cb->opaque); 1332 } 1333 } 1334 QLIST_REMOVE(hwo, entries); 1335 } 1336 1337 QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) { 1338 if (hwi->enabled) { 1339 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE); 1340 } 1341 hwi->pcm_ops->fini_in (hwi); 1342 QLIST_REMOVE(hwi, entries); 1343 } 1344 1345 if (s->drv) { 1346 s->drv->fini (s->drv_opaque); 1347 s->drv = NULL; 1348 } 1349 1350 if (s->dev) { 1351 qapi_free_Audiodev(s->dev); 1352 s->dev = NULL; 1353 } 1354 } 1355 1356 static const VMStateDescription vmstate_audio = { 1357 .name = "audio", 1358 .version_id = 1, 1359 .minimum_version_id = 1, 1360 .fields = (VMStateField[]) { 1361 VMSTATE_END_OF_LIST() 1362 } 1363 }; 1364 1365 static void audio_validate_opts(Audiodev *dev, Error **errp); 1366 1367 static AudiodevListEntry *audiodev_find( 1368 AudiodevListHead *head, const char *drvname) 1369 { 1370 AudiodevListEntry *e; 1371 QSIMPLEQ_FOREACH(e, head, next) { 1372 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1373 return e; 1374 } 1375 } 1376 1377 return NULL; 1378 } 1379 1380 static int audio_init(Audiodev *dev) 1381 { 1382 size_t i; 1383 int done = 0; 1384 const char *drvname = NULL; 1385 VMChangeStateEntry *e; 1386 AudioState *s = &glob_audio_state; 1387 struct audio_driver *driver; 1388 /* silence gcc warning about uninitialized variable */ 1389 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1390 1391 if (s->drv) { 1392 if (dev) { 1393 dolog("Cannot create more than one audio backend, sorry\n"); 1394 qapi_free_Audiodev(dev); 1395 } 1396 return -1; 1397 } 1398 1399 if (dev) { 1400 /* -audiodev option */ 1401 drvname = AudiodevDriver_str(dev->driver); 1402 } else { 1403 /* legacy implicit initialization */ 1404 head = audio_handle_legacy_opts(); 1405 /* 1406 * In case of legacy initialization, all Audiodevs in the list will have 1407 * the same configuration (except the driver), so it does't matter which 1408 * one we chose. We need an Audiodev to set up AudioState before we can 1409 * init a driver. Also note that dev at this point is still in the 1410 * list. 1411 */ 1412 dev = QSIMPLEQ_FIRST(&head)->dev; 1413 audio_validate_opts(dev, &error_abort); 1414 } 1415 s->dev = dev; 1416 1417 QLIST_INIT (&s->hw_head_out); 1418 QLIST_INIT (&s->hw_head_in); 1419 QLIST_INIT (&s->cap_head); 1420 atexit(audio_cleanup); 1421 1422 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1423 1424 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1425 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1426 1427 if (s->nb_hw_voices_out <= 0) { 1428 dolog ("Bogus number of playback voices %d, setting to 1\n", 1429 s->nb_hw_voices_out); 1430 s->nb_hw_voices_out = 1; 1431 } 1432 1433 if (s->nb_hw_voices_in <= 0) { 1434 dolog ("Bogus number of capture voices %d, setting to 0\n", 1435 s->nb_hw_voices_in); 1436 s->nb_hw_voices_in = 0; 1437 } 1438 1439 if (drvname) { 1440 driver = audio_driver_lookup(drvname); 1441 if (driver) { 1442 done = !audio_driver_init(s, driver, true, dev); 1443 } else { 1444 dolog ("Unknown audio driver `%s'\n", drvname); 1445 } 1446 } else { 1447 for (i = 0; audio_prio_list[i]; i++) { 1448 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1449 driver = audio_driver_lookup(audio_prio_list[i]); 1450 1451 if (e && driver) { 1452 s->dev = dev = e->dev; 1453 audio_validate_opts(dev, &error_abort); 1454 done = !audio_driver_init(s, driver, false, dev); 1455 if (done) { 1456 e->dev = NULL; 1457 break; 1458 } 1459 } 1460 } 1461 } 1462 audio_free_audiodev_list(&head); 1463 1464 if (!done) { 1465 driver = audio_driver_lookup("none"); 1466 done = !audio_driver_init(s, driver, false, dev); 1467 assert(done); 1468 dolog("warning: Using timer based audio emulation\n"); 1469 } 1470 1471 if (dev->timer_period <= 0) { 1472 s->period_ticks = 1; 1473 } else { 1474 s->period_ticks = dev->timer_period * SCALE_US; 1475 } 1476 1477 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1478 if (!e) { 1479 dolog ("warning: Could not register change state handler\n" 1480 "(Audio can continue looping even after stopping the VM)\n"); 1481 } 1482 1483 QLIST_INIT (&s->card_head); 1484 vmstate_register (NULL, 0, &vmstate_audio, s); 1485 return 0; 1486 } 1487 1488 void audio_free_audiodev_list(AudiodevListHead *head) 1489 { 1490 AudiodevListEntry *e; 1491 while ((e = QSIMPLEQ_FIRST(head))) { 1492 QSIMPLEQ_REMOVE_HEAD(head, next); 1493 qapi_free_Audiodev(e->dev); 1494 g_free(e); 1495 } 1496 } 1497 1498 void AUD_register_card (const char *name, QEMUSoundCard *card) 1499 { 1500 audio_init(NULL); 1501 card->name = g_strdup (name); 1502 memset (&card->entries, 0, sizeof (card->entries)); 1503 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries); 1504 } 1505 1506 void AUD_remove_card (QEMUSoundCard *card) 1507 { 1508 QLIST_REMOVE (card, entries); 1509 g_free (card->name); 1510 } 1511 1512 1513 CaptureVoiceOut *AUD_add_capture ( 1514 struct audsettings *as, 1515 struct audio_capture_ops *ops, 1516 void *cb_opaque 1517 ) 1518 { 1519 AudioState *s = &glob_audio_state; 1520 CaptureVoiceOut *cap; 1521 struct capture_callback *cb; 1522 1523 if (audio_validate_settings (as)) { 1524 dolog ("Invalid settings were passed when trying to add capture\n"); 1525 audio_print_settings (as); 1526 return NULL; 1527 } 1528 1529 cb = g_malloc0(sizeof(*cb)); 1530 cb->ops = *ops; 1531 cb->opaque = cb_opaque; 1532 1533 cap = audio_pcm_capture_find_specific (as); 1534 if (cap) { 1535 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1536 return cap; 1537 } 1538 else { 1539 HWVoiceOut *hw; 1540 CaptureVoiceOut *cap; 1541 1542 cap = g_malloc0(sizeof(*cap)); 1543 1544 hw = &cap->hw; 1545 QLIST_INIT (&hw->sw_head); 1546 QLIST_INIT (&cap->cb_head); 1547 1548 /* XXX find a more elegant way */ 1549 hw->samples = 4096 * 4; 1550 hw->mix_buf = g_new0(struct st_sample, hw->samples); 1551 1552 audio_pcm_init_info (&hw->info, as); 1553 1554 cap->buf = g_malloc0_n(hw->samples, 1 << hw->info.shift); 1555 1556 hw->clip = mixeng_clip 1557 [hw->info.nchannels == 2] 1558 [hw->info.sign] 1559 [hw->info.swap_endianness] 1560 [audio_bits_to_index (hw->info.bits)]; 1561 1562 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1563 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1564 1565 QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) { 1566 audio_attach_capture (hw); 1567 } 1568 return cap; 1569 } 1570 } 1571 1572 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1573 { 1574 struct capture_callback *cb; 1575 1576 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1577 if (cb->opaque == cb_opaque) { 1578 cb->ops.destroy (cb_opaque); 1579 QLIST_REMOVE (cb, entries); 1580 g_free (cb); 1581 1582 if (!cap->cb_head.lh_first) { 1583 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1584 1585 while (sw) { 1586 SWVoiceCap *sc = (SWVoiceCap *) sw; 1587 #ifdef DEBUG_CAPTURE 1588 dolog ("freeing %s\n", sw->name); 1589 #endif 1590 1591 sw1 = sw->entries.le_next; 1592 if (sw->rate) { 1593 st_rate_stop (sw->rate); 1594 sw->rate = NULL; 1595 } 1596 QLIST_REMOVE (sw, entries); 1597 QLIST_REMOVE (sc, entries); 1598 g_free (sc); 1599 sw = sw1; 1600 } 1601 QLIST_REMOVE (cap, entries); 1602 g_free (cap->hw.mix_buf); 1603 g_free (cap->buf); 1604 g_free (cap); 1605 } 1606 return; 1607 } 1608 } 1609 } 1610 1611 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1612 { 1613 if (sw) { 1614 HWVoiceOut *hw = sw->hw; 1615 1616 sw->vol.mute = mute; 1617 sw->vol.l = nominal_volume.l * lvol / 255; 1618 sw->vol.r = nominal_volume.r * rvol / 255; 1619 1620 if (hw->pcm_ops->ctl_out) { 1621 hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw); 1622 } 1623 } 1624 } 1625 1626 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1627 { 1628 if (sw) { 1629 HWVoiceIn *hw = sw->hw; 1630 1631 sw->vol.mute = mute; 1632 sw->vol.l = nominal_volume.l * lvol / 255; 1633 sw->vol.r = nominal_volume.r * rvol / 255; 1634 1635 if (hw->pcm_ops->ctl_in) { 1636 hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw); 1637 } 1638 } 1639 } 1640 1641 void audio_create_pdos(Audiodev *dev) 1642 { 1643 switch (dev->driver) { 1644 #define CASE(DRIVER, driver, pdo_name) \ 1645 case AUDIODEV_DRIVER_##DRIVER: \ 1646 if (!dev->u.driver.has_in) { \ 1647 dev->u.driver.in = g_malloc0( \ 1648 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1649 dev->u.driver.has_in = true; \ 1650 } \ 1651 if (!dev->u.driver.has_out) { \ 1652 dev->u.driver.out = g_malloc0( \ 1653 sizeof(AudiodevAlsaPerDirectionOptions)); \ 1654 dev->u.driver.has_out = true; \ 1655 } \ 1656 break 1657 1658 CASE(NONE, none, ); 1659 CASE(ALSA, alsa, Alsa); 1660 CASE(COREAUDIO, coreaudio, Coreaudio); 1661 CASE(DSOUND, dsound, ); 1662 CASE(OSS, oss, Oss); 1663 CASE(PA, pa, Pa); 1664 CASE(SDL, sdl, ); 1665 CASE(SPICE, spice, ); 1666 CASE(WAV, wav, ); 1667 1668 case AUDIODEV_DRIVER__MAX: 1669 abort(); 1670 }; 1671 } 1672 1673 static void audio_validate_per_direction_opts( 1674 AudiodevPerDirectionOptions *pdo, Error **errp) 1675 { 1676 if (!pdo->has_fixed_settings) { 1677 pdo->has_fixed_settings = true; 1678 pdo->fixed_settings = true; 1679 } 1680 if (!pdo->fixed_settings && 1681 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1682 error_setg(errp, 1683 "You can't use frequency, channels or format with fixed-settings=off"); 1684 return; 1685 } 1686 1687 if (!pdo->has_frequency) { 1688 pdo->has_frequency = true; 1689 pdo->frequency = 44100; 1690 } 1691 if (!pdo->has_channels) { 1692 pdo->has_channels = true; 1693 pdo->channels = 2; 1694 } 1695 if (!pdo->has_voices) { 1696 pdo->has_voices = true; 1697 pdo->voices = 1; 1698 } 1699 if (!pdo->has_format) { 1700 pdo->has_format = true; 1701 pdo->format = AUDIO_FORMAT_S16; 1702 } 1703 } 1704 1705 static void audio_validate_opts(Audiodev *dev, Error **errp) 1706 { 1707 Error *err = NULL; 1708 1709 audio_create_pdos(dev); 1710 1711 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 1712 if (err) { 1713 error_propagate(errp, err); 1714 return; 1715 } 1716 1717 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 1718 if (err) { 1719 error_propagate(errp, err); 1720 return; 1721 } 1722 1723 if (!dev->has_timer_period) { 1724 dev->has_timer_period = true; 1725 dev->timer_period = 10000; /* 100Hz -> 10ms */ 1726 } 1727 } 1728 1729 void audio_parse_option(const char *opt) 1730 { 1731 AudiodevListEntry *e; 1732 Audiodev *dev = NULL; 1733 1734 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 1735 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 1736 visit_free(v); 1737 1738 audio_validate_opts(dev, &error_fatal); 1739 1740 e = g_malloc0(sizeof(AudiodevListEntry)); 1741 e->dev = dev; 1742 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 1743 } 1744 1745 void audio_init_audiodevs(void) 1746 { 1747 AudiodevListEntry *e; 1748 1749 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 1750 audio_init(e->dev); 1751 } 1752 } 1753 1754 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 1755 { 1756 return (audsettings) { 1757 .freq = pdo->frequency, 1758 .nchannels = pdo->channels, 1759 .fmt = pdo->format, 1760 .endianness = AUDIO_HOST_ENDIANNESS, 1761 }; 1762 } 1763 1764 int audioformat_bytes_per_sample(AudioFormat fmt) 1765 { 1766 switch (fmt) { 1767 case AUDIO_FORMAT_U8: 1768 case AUDIO_FORMAT_S8: 1769 return 1; 1770 1771 case AUDIO_FORMAT_U16: 1772 case AUDIO_FORMAT_S16: 1773 return 2; 1774 1775 case AUDIO_FORMAT_U32: 1776 case AUDIO_FORMAT_S32: 1777 return 4; 1778 1779 case AUDIO_FORMAT__MAX: 1780 ; 1781 } 1782 abort(); 1783 } 1784 1785 1786 /* frames = freq * usec / 1e6 */ 1787 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 1788 audsettings *as, int def_usecs) 1789 { 1790 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 1791 return (as->freq * usecs + 500000) / 1000000; 1792 } 1793 1794 /* samples = channels * frames = channels * freq * usec / 1e6 */ 1795 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 1796 audsettings *as, int def_usecs) 1797 { 1798 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 1799 } 1800 1801 /* 1802 * bytes = bytes_per_sample * samples = 1803 * bytes_per_sample * channels * freq * usec / 1e6 1804 */ 1805 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 1806 audsettings *as, int def_usecs) 1807 { 1808 return audio_buffer_samples(pdo, as, def_usecs) * 1809 audioformat_bytes_per_sample(as->fmt); 1810 } 1811