1 /* 2 * QEMU Audio subsystem 3 * 4 * Copyright (c) 2003-2005 Vassili Karpov (malc) 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "audio.h" 27 #include "migration/vmstate.h" 28 #include "monitor/monitor.h" 29 #include "qemu/timer.h" 30 #include "qapi/error.h" 31 #include "qapi/qobject-input-visitor.h" 32 #include "qapi/qapi-visit-audio.h" 33 #include "qemu/cutils.h" 34 #include "qemu/module.h" 35 #include "sysemu/replay.h" 36 #include "sysemu/runstate.h" 37 #include "trace.h" 38 39 #define AUDIO_CAP "audio" 40 #include "audio_int.h" 41 42 /* #define DEBUG_LIVE */ 43 /* #define DEBUG_OUT */ 44 /* #define DEBUG_CAPTURE */ 45 /* #define DEBUG_POLL */ 46 47 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 48 49 50 /* Order of CONFIG_AUDIO_DRIVERS is import. 51 The 1st one is the one used by default, that is the reason 52 that we generate the list. 53 */ 54 const char *audio_prio_list[] = { 55 "spice", 56 CONFIG_AUDIO_DRIVERS 57 "none", 58 "wav", 59 NULL 60 }; 61 62 static QLIST_HEAD(, audio_driver) audio_drivers; 63 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 64 65 void audio_driver_register(audio_driver *drv) 66 { 67 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 68 } 69 70 audio_driver *audio_driver_lookup(const char *name) 71 { 72 struct audio_driver *d; 73 74 QLIST_FOREACH(d, &audio_drivers, next) { 75 if (strcmp(name, d->name) == 0) { 76 return d; 77 } 78 } 79 80 audio_module_load_one(name); 81 QLIST_FOREACH(d, &audio_drivers, next) { 82 if (strcmp(name, d->name) == 0) { 83 return d; 84 } 85 } 86 87 return NULL; 88 } 89 90 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states = 91 QTAILQ_HEAD_INITIALIZER(audio_states); 92 93 const struct mixeng_volume nominal_volume = { 94 .mute = 0, 95 #ifdef FLOAT_MIXENG 96 .r = 1.0, 97 .l = 1.0, 98 #else 99 .r = 1ULL << 32, 100 .l = 1ULL << 32, 101 #endif 102 }; 103 104 static bool legacy_config = true; 105 106 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED 107 #error No its not 108 #else 109 int audio_bug (const char *funcname, int cond) 110 { 111 if (cond) { 112 static int shown; 113 114 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 115 if (!shown) { 116 shown = 1; 117 AUD_log (NULL, "Save all your work and restart without audio\n"); 118 AUD_log (NULL, "I am sorry\n"); 119 } 120 AUD_log (NULL, "Context:\n"); 121 122 #if defined AUDIO_BREAKPOINT_ON_BUG 123 # if defined HOST_I386 124 # if defined __GNUC__ 125 __asm__ ("int3"); 126 # elif defined _MSC_VER 127 _asm _emit 0xcc; 128 # else 129 abort (); 130 # endif 131 # else 132 abort (); 133 # endif 134 #endif 135 } 136 137 return cond; 138 } 139 #endif 140 141 static inline int audio_bits_to_index (int bits) 142 { 143 switch (bits) { 144 case 8: 145 return 0; 146 147 case 16: 148 return 1; 149 150 case 32: 151 return 2; 152 153 default: 154 audio_bug ("bits_to_index", 1); 155 AUD_log (NULL, "invalid bits %d\n", bits); 156 return 0; 157 } 158 } 159 160 void *audio_calloc (const char *funcname, int nmemb, size_t size) 161 { 162 int cond; 163 size_t len; 164 165 len = nmemb * size; 166 cond = !nmemb || !size; 167 cond |= nmemb < 0; 168 cond |= len < size; 169 170 if (audio_bug ("audio_calloc", cond)) { 171 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 172 funcname); 173 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 174 return NULL; 175 } 176 177 return g_malloc0 (len); 178 } 179 180 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 181 { 182 if (cap) { 183 fprintf(stderr, "%s: ", cap); 184 } 185 186 vfprintf(stderr, fmt, ap); 187 } 188 189 void AUD_log (const char *cap, const char *fmt, ...) 190 { 191 va_list ap; 192 193 va_start (ap, fmt); 194 AUD_vlog (cap, fmt, ap); 195 va_end (ap); 196 } 197 198 static void audio_print_settings (struct audsettings *as) 199 { 200 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 201 202 switch (as->fmt) { 203 case AUDIO_FORMAT_S8: 204 AUD_log (NULL, "S8"); 205 break; 206 case AUDIO_FORMAT_U8: 207 AUD_log (NULL, "U8"); 208 break; 209 case AUDIO_FORMAT_S16: 210 AUD_log (NULL, "S16"); 211 break; 212 case AUDIO_FORMAT_U16: 213 AUD_log (NULL, "U16"); 214 break; 215 case AUDIO_FORMAT_S32: 216 AUD_log (NULL, "S32"); 217 break; 218 case AUDIO_FORMAT_U32: 219 AUD_log (NULL, "U32"); 220 break; 221 case AUDIO_FORMAT_F32: 222 AUD_log (NULL, "F32"); 223 break; 224 default: 225 AUD_log (NULL, "invalid(%d)", as->fmt); 226 break; 227 } 228 229 AUD_log (NULL, " endianness="); 230 switch (as->endianness) { 231 case 0: 232 AUD_log (NULL, "little"); 233 break; 234 case 1: 235 AUD_log (NULL, "big"); 236 break; 237 default: 238 AUD_log (NULL, "invalid"); 239 break; 240 } 241 AUD_log (NULL, "\n"); 242 } 243 244 static int audio_validate_settings (struct audsettings *as) 245 { 246 int invalid; 247 248 invalid = as->nchannels < 1; 249 invalid |= as->endianness != 0 && as->endianness != 1; 250 251 switch (as->fmt) { 252 case AUDIO_FORMAT_S8: 253 case AUDIO_FORMAT_U8: 254 case AUDIO_FORMAT_S16: 255 case AUDIO_FORMAT_U16: 256 case AUDIO_FORMAT_S32: 257 case AUDIO_FORMAT_U32: 258 case AUDIO_FORMAT_F32: 259 break; 260 default: 261 invalid = 1; 262 break; 263 } 264 265 invalid |= as->freq <= 0; 266 return invalid ? -1 : 0; 267 } 268 269 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 270 { 271 int bits = 8; 272 bool is_signed = false, is_float = false; 273 274 switch (as->fmt) { 275 case AUDIO_FORMAT_S8: 276 is_signed = true; 277 /* fall through */ 278 case AUDIO_FORMAT_U8: 279 break; 280 281 case AUDIO_FORMAT_S16: 282 is_signed = true; 283 /* fall through */ 284 case AUDIO_FORMAT_U16: 285 bits = 16; 286 break; 287 288 case AUDIO_FORMAT_F32: 289 is_float = true; 290 /* fall through */ 291 case AUDIO_FORMAT_S32: 292 is_signed = true; 293 /* fall through */ 294 case AUDIO_FORMAT_U32: 295 bits = 32; 296 break; 297 298 default: 299 abort(); 300 } 301 return info->freq == as->freq 302 && info->nchannels == as->nchannels 303 && info->is_signed == is_signed 304 && info->is_float == is_float 305 && info->bits == bits 306 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 307 } 308 309 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 310 { 311 int bits = 8, mul; 312 bool is_signed = false, is_float = false; 313 314 switch (as->fmt) { 315 case AUDIO_FORMAT_S8: 316 is_signed = true; 317 /* fall through */ 318 case AUDIO_FORMAT_U8: 319 mul = 1; 320 break; 321 322 case AUDIO_FORMAT_S16: 323 is_signed = true; 324 /* fall through */ 325 case AUDIO_FORMAT_U16: 326 bits = 16; 327 mul = 2; 328 break; 329 330 case AUDIO_FORMAT_F32: 331 is_float = true; 332 /* fall through */ 333 case AUDIO_FORMAT_S32: 334 is_signed = true; 335 /* fall through */ 336 case AUDIO_FORMAT_U32: 337 bits = 32; 338 mul = 4; 339 break; 340 341 default: 342 abort(); 343 } 344 345 info->freq = as->freq; 346 info->bits = bits; 347 info->is_signed = is_signed; 348 info->is_float = is_float; 349 info->nchannels = as->nchannels; 350 info->bytes_per_frame = as->nchannels * mul; 351 info->bytes_per_second = info->freq * info->bytes_per_frame; 352 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 353 } 354 355 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 356 { 357 if (!len) { 358 return; 359 } 360 361 if (info->is_signed || info->is_float) { 362 memset(buf, 0x00, len * info->bytes_per_frame); 363 } 364 else { 365 switch (info->bits) { 366 case 8: 367 memset(buf, 0x80, len * info->bytes_per_frame); 368 break; 369 370 case 16: 371 { 372 int i; 373 uint16_t *p = buf; 374 short s = INT16_MAX; 375 376 if (info->swap_endianness) { 377 s = bswap16 (s); 378 } 379 380 for (i = 0; i < len * info->nchannels; i++) { 381 p[i] = s; 382 } 383 } 384 break; 385 386 case 32: 387 { 388 int i; 389 uint32_t *p = buf; 390 int32_t s = INT32_MAX; 391 392 if (info->swap_endianness) { 393 s = bswap32 (s); 394 } 395 396 for (i = 0; i < len * info->nchannels; i++) { 397 p[i] = s; 398 } 399 } 400 break; 401 402 default: 403 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 404 info->bits); 405 break; 406 } 407 } 408 } 409 410 /* 411 * Capture 412 */ 413 static void noop_conv (struct st_sample *dst, const void *src, int samples) 414 { 415 (void) src; 416 (void) dst; 417 (void) samples; 418 } 419 420 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s, 421 struct audsettings *as) 422 { 423 CaptureVoiceOut *cap; 424 425 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 426 if (audio_pcm_info_eq (&cap->hw.info, as)) { 427 return cap; 428 } 429 } 430 return NULL; 431 } 432 433 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 434 { 435 struct capture_callback *cb; 436 437 #ifdef DEBUG_CAPTURE 438 dolog ("notification %d sent\n", cmd); 439 #endif 440 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 441 cb->ops.notify (cb->opaque, cmd); 442 } 443 } 444 445 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 446 { 447 if (cap->hw.enabled != enabled) { 448 audcnotification_e cmd; 449 cap->hw.enabled = enabled; 450 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 451 audio_notify_capture (cap, cmd); 452 } 453 } 454 455 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 456 { 457 HWVoiceOut *hw = &cap->hw; 458 SWVoiceOut *sw; 459 int enabled = 0; 460 461 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 462 if (sw->active) { 463 enabled = 1; 464 break; 465 } 466 } 467 audio_capture_maybe_changed (cap, enabled); 468 } 469 470 static void audio_detach_capture (HWVoiceOut *hw) 471 { 472 SWVoiceCap *sc = hw->cap_head.lh_first; 473 474 while (sc) { 475 SWVoiceCap *sc1 = sc->entries.le_next; 476 SWVoiceOut *sw = &sc->sw; 477 CaptureVoiceOut *cap = sc->cap; 478 int was_active = sw->active; 479 480 if (sw->rate) { 481 st_rate_stop (sw->rate); 482 sw->rate = NULL; 483 } 484 485 QLIST_REMOVE (sw, entries); 486 QLIST_REMOVE (sc, entries); 487 g_free (sc); 488 if (was_active) { 489 /* We have removed soft voice from the capture: 490 this might have changed the overall status of the capture 491 since this might have been the only active voice */ 492 audio_recalc_and_notify_capture (cap); 493 } 494 sc = sc1; 495 } 496 } 497 498 static int audio_attach_capture (HWVoiceOut *hw) 499 { 500 AudioState *s = hw->s; 501 CaptureVoiceOut *cap; 502 503 audio_detach_capture (hw); 504 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 505 SWVoiceCap *sc; 506 SWVoiceOut *sw; 507 HWVoiceOut *hw_cap = &cap->hw; 508 509 sc = g_malloc0(sizeof(*sc)); 510 511 sc->cap = cap; 512 sw = &sc->sw; 513 sw->hw = hw_cap; 514 sw->info = hw->info; 515 sw->empty = 1; 516 sw->active = hw->enabled; 517 sw->conv = noop_conv; 518 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 519 sw->vol = nominal_volume; 520 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 521 if (!sw->rate) { 522 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 523 g_free (sw); 524 return -1; 525 } 526 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 527 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 528 #ifdef DEBUG_CAPTURE 529 sw->name = g_strdup_printf ("for %p %d,%d,%d", 530 hw, sw->info.freq, sw->info.bits, 531 sw->info.nchannels); 532 dolog ("Added %s active = %d\n", sw->name, sw->active); 533 #endif 534 if (sw->active) { 535 audio_capture_maybe_changed (cap, 1); 536 } 537 } 538 return 0; 539 } 540 541 /* 542 * Hard voice (capture) 543 */ 544 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw) 545 { 546 SWVoiceIn *sw; 547 size_t m = hw->total_samples_captured; 548 549 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 550 if (sw->active) { 551 m = MIN (m, sw->total_hw_samples_acquired); 552 } 553 } 554 return m; 555 } 556 557 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw) 558 { 559 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 560 if (audio_bug(__func__, live > hw->conv_buf->size)) { 561 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 562 return 0; 563 } 564 return live; 565 } 566 567 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len) 568 { 569 size_t clipped = 0; 570 size_t pos = hw->mix_buf->pos; 571 572 while (len) { 573 st_sample *src = hw->mix_buf->samples + pos; 574 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame); 575 size_t samples_till_end_of_buf = hw->mix_buf->size - pos; 576 size_t samples_to_clip = MIN(len, samples_till_end_of_buf); 577 578 hw->clip(dst, src, samples_to_clip); 579 580 pos = (pos + samples_to_clip) % hw->mix_buf->size; 581 len -= samples_to_clip; 582 clipped += samples_to_clip; 583 } 584 } 585 586 /* 587 * Soft voice (capture) 588 */ 589 static size_t audio_pcm_sw_get_rpos_in(SWVoiceIn *sw) 590 { 591 HWVoiceIn *hw = sw->hw; 592 ssize_t live = hw->total_samples_captured - sw->total_hw_samples_acquired; 593 ssize_t rpos; 594 595 if (audio_bug(__func__, live < 0 || live > hw->conv_buf->size)) { 596 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 597 return 0; 598 } 599 600 rpos = hw->conv_buf->pos - live; 601 if (rpos >= 0) { 602 return rpos; 603 } 604 else { 605 return hw->conv_buf->size + rpos; 606 } 607 } 608 609 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size) 610 { 611 HWVoiceIn *hw = sw->hw; 612 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 613 struct st_sample *src, *dst = sw->buf; 614 615 rpos = audio_pcm_sw_get_rpos_in(sw) % hw->conv_buf->size; 616 617 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 618 if (audio_bug(__func__, live > hw->conv_buf->size)) { 619 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 620 return 0; 621 } 622 623 samples = size / sw->info.bytes_per_frame; 624 if (!live) { 625 return 0; 626 } 627 628 swlim = (live * sw->ratio) >> 32; 629 swlim = MIN (swlim, samples); 630 631 while (swlim) { 632 src = hw->conv_buf->samples + rpos; 633 if (hw->conv_buf->pos > rpos) { 634 isamp = hw->conv_buf->pos - rpos; 635 } else { 636 isamp = hw->conv_buf->size - rpos; 637 } 638 639 if (!isamp) { 640 break; 641 } 642 osamp = swlim; 643 644 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 645 swlim -= osamp; 646 rpos = (rpos + isamp) % hw->conv_buf->size; 647 dst += osamp; 648 ret += osamp; 649 total += isamp; 650 } 651 652 if (!hw->pcm_ops->volume_in) { 653 mixeng_volume (sw->buf, ret, &sw->vol); 654 } 655 656 sw->clip (buf, sw->buf, ret); 657 sw->total_hw_samples_acquired += total; 658 return ret * sw->info.bytes_per_frame; 659 } 660 661 /* 662 * Hard voice (playback) 663 */ 664 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 665 { 666 SWVoiceOut *sw; 667 size_t m = SIZE_MAX; 668 int nb_live = 0; 669 670 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 671 if (sw->active || !sw->empty) { 672 m = MIN (m, sw->total_hw_samples_mixed); 673 nb_live += 1; 674 } 675 } 676 677 *nb_livep = nb_live; 678 return m; 679 } 680 681 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 682 { 683 size_t smin; 684 int nb_live1; 685 686 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 687 if (nb_live) { 688 *nb_live = nb_live1; 689 } 690 691 if (nb_live1) { 692 size_t live = smin; 693 694 if (audio_bug(__func__, live > hw->mix_buf->size)) { 695 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 696 return 0; 697 } 698 return live; 699 } 700 return 0; 701 } 702 703 /* 704 * Soft voice (playback) 705 */ 706 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size) 707 { 708 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck; 709 size_t ret = 0, pos = 0, total = 0; 710 711 if (!sw) { 712 return size; 713 } 714 715 hwsamples = sw->hw->mix_buf->size; 716 717 live = sw->total_hw_samples_mixed; 718 if (audio_bug(__func__, live > hwsamples)) { 719 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples); 720 return 0; 721 } 722 723 if (live == hwsamples) { 724 #ifdef DEBUG_OUT 725 dolog ("%s is full %d\n", sw->name, live); 726 #endif 727 return 0; 728 } 729 730 wpos = (sw->hw->mix_buf->pos + live) % hwsamples; 731 samples = size / sw->info.bytes_per_frame; 732 733 dead = hwsamples - live; 734 swlim = ((int64_t) dead << 32) / sw->ratio; 735 swlim = MIN (swlim, samples); 736 if (swlim) { 737 sw->conv (sw->buf, buf, swlim); 738 739 if (!sw->hw->pcm_ops->volume_out) { 740 mixeng_volume (sw->buf, swlim, &sw->vol); 741 } 742 } 743 744 while (swlim) { 745 dead = hwsamples - live; 746 left = hwsamples - wpos; 747 blck = MIN (dead, left); 748 if (!blck) { 749 break; 750 } 751 isamp = swlim; 752 osamp = blck; 753 st_rate_flow_mix ( 754 sw->rate, 755 sw->buf + pos, 756 sw->hw->mix_buf->samples + wpos, 757 &isamp, 758 &osamp 759 ); 760 ret += isamp; 761 swlim -= isamp; 762 pos += isamp; 763 live += osamp; 764 wpos = (wpos + osamp) % hwsamples; 765 total += osamp; 766 } 767 768 sw->total_hw_samples_mixed += total; 769 sw->empty = sw->total_hw_samples_mixed == 0; 770 771 #ifdef DEBUG_OUT 772 dolog ( 773 "%s: write size %zu ret %zu total sw %zu\n", 774 SW_NAME (sw), 775 size / sw->info.bytes_per_frame, 776 ret, 777 sw->total_hw_samples_mixed 778 ); 779 #endif 780 781 return ret * sw->info.bytes_per_frame; 782 } 783 784 #ifdef DEBUG_AUDIO 785 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 786 { 787 dolog("%s: bits %d, sign %d, float %d, freq %d, nchan %d\n", 788 cap, info->bits, info->is_signed, info->is_float, info->freq, 789 info->nchannels); 790 } 791 #endif 792 793 #define DAC 794 #include "audio_template.h" 795 #undef DAC 796 #include "audio_template.h" 797 798 /* 799 * Timer 800 */ 801 static int audio_is_timer_needed(AudioState *s) 802 { 803 HWVoiceIn *hwi = NULL; 804 HWVoiceOut *hwo = NULL; 805 806 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 807 if (!hwo->poll_mode) return 1; 808 } 809 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 810 if (!hwi->poll_mode) return 1; 811 } 812 return 0; 813 } 814 815 static void audio_reset_timer (AudioState *s) 816 { 817 if (audio_is_timer_needed(s)) { 818 timer_mod_anticipate_ns(s->ts, 819 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 820 if (!s->timer_running) { 821 s->timer_running = true; 822 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 823 trace_audio_timer_start(s->period_ticks / SCALE_MS); 824 } 825 } else { 826 timer_del(s->ts); 827 if (s->timer_running) { 828 s->timer_running = false; 829 trace_audio_timer_stop(); 830 } 831 } 832 } 833 834 static void audio_timer (void *opaque) 835 { 836 int64_t now, diff; 837 AudioState *s = opaque; 838 839 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 840 diff = now - s->timer_last; 841 if (diff > s->period_ticks * 3 / 2) { 842 trace_audio_timer_delayed(diff / SCALE_MS); 843 } 844 s->timer_last = now; 845 846 audio_run(s, "timer"); 847 audio_reset_timer(s); 848 } 849 850 /* 851 * Public API 852 */ 853 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size) 854 { 855 HWVoiceOut *hw; 856 857 if (!sw) { 858 /* XXX: Consider options */ 859 return size; 860 } 861 hw = sw->hw; 862 863 if (!hw->enabled) { 864 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 865 return 0; 866 } 867 868 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) { 869 return audio_pcm_sw_write(sw, buf, size); 870 } else { 871 return hw->pcm_ops->write(hw, buf, size); 872 } 873 } 874 875 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size) 876 { 877 HWVoiceIn *hw; 878 879 if (!sw) { 880 /* XXX: Consider options */ 881 return size; 882 } 883 hw = sw->hw; 884 885 if (!hw->enabled) { 886 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 887 return 0; 888 } 889 890 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) { 891 return audio_pcm_sw_read(sw, buf, size); 892 } else { 893 return hw->pcm_ops->read(hw, buf, size); 894 } 895 } 896 897 int AUD_get_buffer_size_out(SWVoiceOut *sw) 898 { 899 return sw->hw->samples * sw->hw->info.bytes_per_frame; 900 } 901 902 void AUD_set_active_out (SWVoiceOut *sw, int on) 903 { 904 HWVoiceOut *hw; 905 906 if (!sw) { 907 return; 908 } 909 910 hw = sw->hw; 911 if (sw->active != on) { 912 AudioState *s = sw->s; 913 SWVoiceOut *temp_sw; 914 SWVoiceCap *sc; 915 916 if (on) { 917 hw->pending_disable = 0; 918 if (!hw->enabled) { 919 hw->enabled = 1; 920 if (s->vm_running) { 921 if (hw->pcm_ops->enable_out) { 922 hw->pcm_ops->enable_out(hw, true); 923 } 924 audio_reset_timer (s); 925 } 926 } 927 } 928 else { 929 if (hw->enabled) { 930 int nb_active = 0; 931 932 for (temp_sw = hw->sw_head.lh_first; temp_sw; 933 temp_sw = temp_sw->entries.le_next) { 934 nb_active += temp_sw->active != 0; 935 } 936 937 hw->pending_disable = nb_active == 1; 938 } 939 } 940 941 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 942 sc->sw.active = hw->enabled; 943 if (hw->enabled) { 944 audio_capture_maybe_changed (sc->cap, 1); 945 } 946 } 947 sw->active = on; 948 } 949 } 950 951 void AUD_set_active_in (SWVoiceIn *sw, int on) 952 { 953 HWVoiceIn *hw; 954 955 if (!sw) { 956 return; 957 } 958 959 hw = sw->hw; 960 if (sw->active != on) { 961 AudioState *s = sw->s; 962 SWVoiceIn *temp_sw; 963 964 if (on) { 965 if (!hw->enabled) { 966 hw->enabled = 1; 967 if (s->vm_running) { 968 if (hw->pcm_ops->enable_in) { 969 hw->pcm_ops->enable_in(hw, true); 970 } 971 audio_reset_timer (s); 972 } 973 } 974 sw->total_hw_samples_acquired = hw->total_samples_captured; 975 } 976 else { 977 if (hw->enabled) { 978 int nb_active = 0; 979 980 for (temp_sw = hw->sw_head.lh_first; temp_sw; 981 temp_sw = temp_sw->entries.le_next) { 982 nb_active += temp_sw->active != 0; 983 } 984 985 if (nb_active == 1) { 986 hw->enabled = 0; 987 if (hw->pcm_ops->enable_in) { 988 hw->pcm_ops->enable_in(hw, false); 989 } 990 } 991 } 992 } 993 sw->active = on; 994 } 995 } 996 997 static size_t audio_get_avail (SWVoiceIn *sw) 998 { 999 size_t live; 1000 1001 if (!sw) { 1002 return 0; 1003 } 1004 1005 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 1006 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) { 1007 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live, 1008 sw->hw->conv_buf->size); 1009 return 0; 1010 } 1011 1012 ldebug ( 1013 "%s: get_avail live %d ret %" PRId64 "\n", 1014 SW_NAME (sw), 1015 live, (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame 1016 ); 1017 1018 return (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame; 1019 } 1020 1021 static size_t audio_get_free(SWVoiceOut *sw) 1022 { 1023 size_t live, dead; 1024 1025 if (!sw) { 1026 return 0; 1027 } 1028 1029 live = sw->total_hw_samples_mixed; 1030 1031 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) { 1032 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live, 1033 sw->hw->mix_buf->size); 1034 return 0; 1035 } 1036 1037 dead = sw->hw->mix_buf->size - live; 1038 1039 #ifdef DEBUG_OUT 1040 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n", 1041 SW_NAME (sw), 1042 live, dead, (((int64_t) dead << 32) / sw->ratio) * 1043 sw->info.bytes_per_frame); 1044 #endif 1045 1046 return (((int64_t) dead << 32) / sw->ratio) * sw->info.bytes_per_frame; 1047 } 1048 1049 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos, 1050 size_t samples) 1051 { 1052 size_t n; 1053 1054 if (hw->enabled) { 1055 SWVoiceCap *sc; 1056 1057 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1058 SWVoiceOut *sw = &sc->sw; 1059 int rpos2 = rpos; 1060 1061 n = samples; 1062 while (n) { 1063 size_t till_end_of_hw = hw->mix_buf->size - rpos2; 1064 size_t to_write = MIN(till_end_of_hw, n); 1065 size_t bytes = to_write * hw->info.bytes_per_frame; 1066 size_t written; 1067 1068 sw->buf = hw->mix_buf->samples + rpos2; 1069 written = audio_pcm_sw_write (sw, NULL, bytes); 1070 if (written - bytes) { 1071 dolog("Could not mix %zu bytes into a capture " 1072 "buffer, mixed %zu\n", 1073 bytes, written); 1074 break; 1075 } 1076 n -= to_write; 1077 rpos2 = (rpos2 + to_write) % hw->mix_buf->size; 1078 } 1079 } 1080 } 1081 1082 n = MIN(samples, hw->mix_buf->size - rpos); 1083 mixeng_clear(hw->mix_buf->samples + rpos, n); 1084 mixeng_clear(hw->mix_buf->samples, samples - n); 1085 } 1086 1087 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live) 1088 { 1089 size_t clipped = 0; 1090 1091 while (live) { 1092 size_t size, decr, proc; 1093 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1094 if (!buf || size == 0) { 1095 break; 1096 } 1097 1098 decr = MIN(size / hw->info.bytes_per_frame, live); 1099 audio_pcm_hw_clip_out(hw, buf, decr); 1100 proc = hw->pcm_ops->put_buffer_out(hw, buf, 1101 decr * hw->info.bytes_per_frame) / 1102 hw->info.bytes_per_frame; 1103 1104 live -= proc; 1105 clipped += proc; 1106 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size; 1107 1108 if (proc == 0 || proc < decr) { 1109 break; 1110 } 1111 } 1112 1113 if (hw->pcm_ops->run_buffer_out) { 1114 hw->pcm_ops->run_buffer_out(hw); 1115 } 1116 1117 return clipped; 1118 } 1119 1120 static void audio_run_out (AudioState *s) 1121 { 1122 HWVoiceOut *hw = NULL; 1123 SWVoiceOut *sw; 1124 1125 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1126 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1127 /* there is exactly 1 sw for each hw with no mixeng */ 1128 sw = hw->sw_head.lh_first; 1129 1130 if (hw->pending_disable) { 1131 hw->enabled = 0; 1132 hw->pending_disable = 0; 1133 if (hw->pcm_ops->enable_out) { 1134 hw->pcm_ops->enable_out(hw, false); 1135 } 1136 } 1137 1138 if (sw->active) { 1139 sw->callback.fn(sw->callback.opaque, INT_MAX); 1140 } 1141 } 1142 return; 1143 } 1144 1145 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1146 size_t played, live, prev_rpos, free; 1147 int nb_live, cleanup_required; 1148 1149 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1150 if (!nb_live) { 1151 live = 0; 1152 } 1153 1154 if (audio_bug(__func__, live > hw->mix_buf->size)) { 1155 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 1156 continue; 1157 } 1158 1159 if (hw->pending_disable && !nb_live) { 1160 SWVoiceCap *sc; 1161 #ifdef DEBUG_OUT 1162 dolog ("Disabling voice\n"); 1163 #endif 1164 hw->enabled = 0; 1165 hw->pending_disable = 0; 1166 if (hw->pcm_ops->enable_out) { 1167 hw->pcm_ops->enable_out(hw, false); 1168 } 1169 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1170 sc->sw.active = 0; 1171 audio_recalc_and_notify_capture (sc->cap); 1172 } 1173 continue; 1174 } 1175 1176 if (!live) { 1177 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1178 if (sw->active) { 1179 free = audio_get_free (sw); 1180 if (free > 0) { 1181 sw->callback.fn (sw->callback.opaque, free); 1182 } 1183 } 1184 } 1185 continue; 1186 } 1187 1188 prev_rpos = hw->mix_buf->pos; 1189 played = audio_pcm_hw_run_out(hw, live); 1190 replay_audio_out(&played); 1191 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) { 1192 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n", 1193 hw->mix_buf->pos, hw->mix_buf->size, played); 1194 hw->mix_buf->pos = 0; 1195 } 1196 1197 #ifdef DEBUG_OUT 1198 dolog("played=%zu\n", played); 1199 #endif 1200 1201 if (played) { 1202 hw->ts_helper += played; 1203 audio_capture_mix_and_clear (hw, prev_rpos, played); 1204 } 1205 1206 cleanup_required = 0; 1207 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1208 if (!sw->active && sw->empty) { 1209 continue; 1210 } 1211 1212 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1213 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1214 played, sw->total_hw_samples_mixed); 1215 played = sw->total_hw_samples_mixed; 1216 } 1217 1218 sw->total_hw_samples_mixed -= played; 1219 1220 if (!sw->total_hw_samples_mixed) { 1221 sw->empty = 1; 1222 cleanup_required |= !sw->active && !sw->callback.fn; 1223 } 1224 1225 if (sw->active) { 1226 free = audio_get_free (sw); 1227 if (free > 0) { 1228 sw->callback.fn (sw->callback.opaque, free); 1229 } 1230 } 1231 } 1232 1233 if (cleanup_required) { 1234 SWVoiceOut *sw1; 1235 1236 sw = hw->sw_head.lh_first; 1237 while (sw) { 1238 sw1 = sw->entries.le_next; 1239 if (!sw->active && !sw->callback.fn) { 1240 audio_close_out (sw); 1241 } 1242 sw = sw1; 1243 } 1244 } 1245 } 1246 } 1247 1248 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1249 { 1250 size_t conv = 0; 1251 STSampleBuffer *conv_buf = hw->conv_buf; 1252 1253 while (samples) { 1254 size_t proc; 1255 size_t size = samples * hw->info.bytes_per_frame; 1256 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1257 1258 assert(size % hw->info.bytes_per_frame == 0); 1259 if (size == 0) { 1260 hw->pcm_ops->put_buffer_in(hw, buf, size); 1261 break; 1262 } 1263 1264 proc = MIN(size / hw->info.bytes_per_frame, 1265 conv_buf->size - conv_buf->pos); 1266 1267 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc); 1268 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 1269 1270 samples -= proc; 1271 conv += proc; 1272 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame); 1273 } 1274 1275 return conv; 1276 } 1277 1278 static void audio_run_in (AudioState *s) 1279 { 1280 HWVoiceIn *hw = NULL; 1281 1282 if (!audio_get_pdo_in(s->dev)->mixing_engine) { 1283 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1284 /* there is exactly 1 sw for each hw with no mixeng */ 1285 SWVoiceIn *sw = hw->sw_head.lh_first; 1286 if (sw->active) { 1287 sw->callback.fn(sw->callback.opaque, INT_MAX); 1288 } 1289 } 1290 return; 1291 } 1292 1293 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1294 SWVoiceIn *sw; 1295 size_t captured = 0, min; 1296 1297 if (replay_mode != REPLAY_MODE_PLAY) { 1298 captured = audio_pcm_hw_run_in( 1299 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw)); 1300 } 1301 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos, 1302 hw->conv_buf->size); 1303 1304 min = audio_pcm_hw_find_min_in (hw); 1305 hw->total_samples_captured += captured - min; 1306 hw->ts_helper += captured; 1307 1308 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1309 sw->total_hw_samples_acquired -= min; 1310 1311 if (sw->active) { 1312 size_t avail; 1313 1314 avail = audio_get_avail (sw); 1315 if (avail > 0) { 1316 sw->callback.fn (sw->callback.opaque, avail); 1317 } 1318 } 1319 } 1320 } 1321 } 1322 1323 static void audio_run_capture (AudioState *s) 1324 { 1325 CaptureVoiceOut *cap; 1326 1327 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1328 size_t live, rpos, captured; 1329 HWVoiceOut *hw = &cap->hw; 1330 SWVoiceOut *sw; 1331 1332 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1333 rpos = hw->mix_buf->pos; 1334 while (live) { 1335 size_t left = hw->mix_buf->size - rpos; 1336 size_t to_capture = MIN(live, left); 1337 struct st_sample *src; 1338 struct capture_callback *cb; 1339 1340 src = hw->mix_buf->samples + rpos; 1341 hw->clip (cap->buf, src, to_capture); 1342 mixeng_clear (src, to_capture); 1343 1344 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1345 cb->ops.capture (cb->opaque, cap->buf, 1346 to_capture * hw->info.bytes_per_frame); 1347 } 1348 rpos = (rpos + to_capture) % hw->mix_buf->size; 1349 live -= to_capture; 1350 } 1351 hw->mix_buf->pos = rpos; 1352 1353 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1354 if (!sw->active && sw->empty) { 1355 continue; 1356 } 1357 1358 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1359 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1360 captured, sw->total_hw_samples_mixed); 1361 captured = sw->total_hw_samples_mixed; 1362 } 1363 1364 sw->total_hw_samples_mixed -= captured; 1365 sw->empty = sw->total_hw_samples_mixed == 0; 1366 } 1367 } 1368 } 1369 1370 void audio_run(AudioState *s, const char *msg) 1371 { 1372 audio_run_out(s); 1373 audio_run_in(s); 1374 audio_run_capture(s); 1375 1376 #ifdef DEBUG_POLL 1377 { 1378 static double prevtime; 1379 double currtime; 1380 struct timeval tv; 1381 1382 if (gettimeofday (&tv, NULL)) { 1383 perror ("audio_run: gettimeofday"); 1384 return; 1385 } 1386 1387 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1388 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1389 prevtime = currtime; 1390 } 1391 #endif 1392 } 1393 1394 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1395 { 1396 ssize_t start; 1397 1398 if (unlikely(!hw->buf_emul)) { 1399 size_t calc_size = hw->conv_buf->size * hw->info.bytes_per_frame; 1400 hw->buf_emul = g_malloc(calc_size); 1401 hw->size_emul = calc_size; 1402 hw->pos_emul = hw->pending_emul = 0; 1403 } 1404 1405 while (hw->pending_emul < hw->size_emul) { 1406 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1407 hw->size_emul - hw->pending_emul); 1408 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1409 read_len); 1410 hw->pending_emul += read; 1411 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul; 1412 if (read < read_len) { 1413 break; 1414 } 1415 } 1416 1417 start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1418 if (start < 0) { 1419 start += hw->size_emul; 1420 } 1421 assert(start >= 0 && start < hw->size_emul); 1422 1423 *size = MIN(*size, hw->pending_emul); 1424 *size = MIN(*size, hw->size_emul - start); 1425 return hw->buf_emul + start; 1426 } 1427 1428 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1429 { 1430 assert(size <= hw->pending_emul); 1431 hw->pending_emul -= size; 1432 } 1433 1434 void audio_generic_run_buffer_out(HWVoiceOut *hw) 1435 { 1436 while (hw->pending_emul) { 1437 size_t write_len, written; 1438 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1439 1440 if (start < 0) { 1441 start += hw->size_emul; 1442 } 1443 assert(start >= 0 && start < hw->size_emul); 1444 1445 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1446 1447 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1448 hw->pending_emul -= written; 1449 1450 if (written < write_len) { 1451 break; 1452 } 1453 } 1454 } 1455 1456 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1457 { 1458 if (unlikely(!hw->buf_emul)) { 1459 size_t calc_size = hw->mix_buf->size * hw->info.bytes_per_frame; 1460 1461 hw->buf_emul = g_malloc(calc_size); 1462 hw->size_emul = calc_size; 1463 hw->pos_emul = hw->pending_emul = 0; 1464 } 1465 1466 *size = MIN(hw->size_emul - hw->pending_emul, 1467 hw->size_emul - hw->pos_emul); 1468 return hw->buf_emul + hw->pos_emul; 1469 } 1470 1471 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1472 { 1473 assert(buf == hw->buf_emul + hw->pos_emul && 1474 size + hw->pending_emul <= hw->size_emul); 1475 1476 hw->pending_emul += size; 1477 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1478 1479 return size; 1480 } 1481 1482 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1483 { 1484 size_t dst_size, copy_size; 1485 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1486 copy_size = MIN(size, dst_size); 1487 1488 memcpy(dst, buf, copy_size); 1489 return hw->pcm_ops->put_buffer_out(hw, dst, copy_size); 1490 } 1491 1492 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1493 { 1494 size_t src_size, copy_size; 1495 void *src = hw->pcm_ops->get_buffer_in(hw, &src_size); 1496 copy_size = MIN(size, src_size); 1497 1498 memcpy(buf, src, copy_size); 1499 hw->pcm_ops->put_buffer_in(hw, src, copy_size); 1500 return copy_size; 1501 } 1502 1503 1504 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1505 bool msg, Audiodev *dev) 1506 { 1507 s->drv_opaque = drv->init(dev); 1508 1509 if (s->drv_opaque) { 1510 if (!drv->pcm_ops->get_buffer_in) { 1511 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1512 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1513 } 1514 if (!drv->pcm_ops->get_buffer_out) { 1515 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1516 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1517 } 1518 1519 audio_init_nb_voices_out(s, drv); 1520 audio_init_nb_voices_in(s, drv); 1521 s->drv = drv; 1522 return 0; 1523 } 1524 else { 1525 if (msg) { 1526 dolog("Could not init `%s' audio driver\n", drv->name); 1527 } 1528 return -1; 1529 } 1530 } 1531 1532 static void audio_vm_change_state_handler (void *opaque, int running, 1533 RunState state) 1534 { 1535 AudioState *s = opaque; 1536 HWVoiceOut *hwo = NULL; 1537 HWVoiceIn *hwi = NULL; 1538 1539 s->vm_running = running; 1540 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1541 if (hwo->pcm_ops->enable_out) { 1542 hwo->pcm_ops->enable_out(hwo, running); 1543 } 1544 } 1545 1546 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1547 if (hwi->pcm_ops->enable_in) { 1548 hwi->pcm_ops->enable_in(hwi, running); 1549 } 1550 } 1551 audio_reset_timer (s); 1552 } 1553 1554 static bool is_cleaning_up; 1555 1556 bool audio_is_cleaning_up(void) 1557 { 1558 return is_cleaning_up; 1559 } 1560 1561 static void free_audio_state(AudioState *s) 1562 { 1563 HWVoiceOut *hwo, *hwon; 1564 HWVoiceIn *hwi, *hwin; 1565 1566 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1567 SWVoiceCap *sc; 1568 1569 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1570 hwo->pcm_ops->enable_out(hwo, false); 1571 } 1572 hwo->pcm_ops->fini_out (hwo); 1573 1574 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1575 CaptureVoiceOut *cap = sc->cap; 1576 struct capture_callback *cb; 1577 1578 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1579 cb->ops.destroy (cb->opaque); 1580 } 1581 } 1582 QLIST_REMOVE(hwo, entries); 1583 } 1584 1585 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1586 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1587 hwi->pcm_ops->enable_in(hwi, false); 1588 } 1589 hwi->pcm_ops->fini_in (hwi); 1590 QLIST_REMOVE(hwi, entries); 1591 } 1592 1593 if (s->drv) { 1594 s->drv->fini (s->drv_opaque); 1595 s->drv = NULL; 1596 } 1597 1598 if (s->dev) { 1599 qapi_free_Audiodev(s->dev); 1600 s->dev = NULL; 1601 } 1602 1603 if (s->ts) { 1604 timer_free(s->ts); 1605 s->ts = NULL; 1606 } 1607 1608 g_free(s); 1609 } 1610 1611 void audio_cleanup(void) 1612 { 1613 is_cleaning_up = true; 1614 while (!QTAILQ_EMPTY(&audio_states)) { 1615 AudioState *s = QTAILQ_FIRST(&audio_states); 1616 QTAILQ_REMOVE(&audio_states, s, list); 1617 free_audio_state(s); 1618 } 1619 } 1620 1621 static const VMStateDescription vmstate_audio = { 1622 .name = "audio", 1623 .version_id = 1, 1624 .minimum_version_id = 1, 1625 .fields = (VMStateField[]) { 1626 VMSTATE_END_OF_LIST() 1627 } 1628 }; 1629 1630 static void audio_validate_opts(Audiodev *dev, Error **errp); 1631 1632 static AudiodevListEntry *audiodev_find( 1633 AudiodevListHead *head, const char *drvname) 1634 { 1635 AudiodevListEntry *e; 1636 QSIMPLEQ_FOREACH(e, head, next) { 1637 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1638 return e; 1639 } 1640 } 1641 1642 return NULL; 1643 } 1644 1645 /* 1646 * if we have dev, this function was called because of an -audiodev argument => 1647 * initialize a new state with it 1648 * if dev == NULL => legacy implicit initialization, return the already created 1649 * state or create a new one 1650 */ 1651 static AudioState *audio_init(Audiodev *dev, const char *name) 1652 { 1653 static bool atexit_registered; 1654 size_t i; 1655 int done = 0; 1656 const char *drvname = NULL; 1657 VMChangeStateEntry *e; 1658 AudioState *s; 1659 struct audio_driver *driver; 1660 /* silence gcc warning about uninitialized variable */ 1661 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1662 1663 if (dev) { 1664 /* -audiodev option */ 1665 legacy_config = false; 1666 drvname = AudiodevDriver_str(dev->driver); 1667 } else if (!QTAILQ_EMPTY(&audio_states)) { 1668 if (!legacy_config) { 1669 dolog("Device %s: audiodev default parameter is deprecated, please " 1670 "specify audiodev=%s\n", name, 1671 QTAILQ_FIRST(&audio_states)->dev->id); 1672 } 1673 return QTAILQ_FIRST(&audio_states); 1674 } else { 1675 /* legacy implicit initialization */ 1676 head = audio_handle_legacy_opts(); 1677 /* 1678 * In case of legacy initialization, all Audiodevs in the list will have 1679 * the same configuration (except the driver), so it does't matter which 1680 * one we chose. We need an Audiodev to set up AudioState before we can 1681 * init a driver. Also note that dev at this point is still in the 1682 * list. 1683 */ 1684 dev = QSIMPLEQ_FIRST(&head)->dev; 1685 audio_validate_opts(dev, &error_abort); 1686 } 1687 1688 s = g_malloc0(sizeof(AudioState)); 1689 s->dev = dev; 1690 1691 QLIST_INIT (&s->hw_head_out); 1692 QLIST_INIT (&s->hw_head_in); 1693 QLIST_INIT (&s->cap_head); 1694 if (!atexit_registered) { 1695 atexit(audio_cleanup); 1696 atexit_registered = true; 1697 } 1698 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1699 1700 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1701 1702 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1703 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1704 1705 if (s->nb_hw_voices_out <= 0) { 1706 dolog ("Bogus number of playback voices %d, setting to 1\n", 1707 s->nb_hw_voices_out); 1708 s->nb_hw_voices_out = 1; 1709 } 1710 1711 if (s->nb_hw_voices_in <= 0) { 1712 dolog ("Bogus number of capture voices %d, setting to 0\n", 1713 s->nb_hw_voices_in); 1714 s->nb_hw_voices_in = 0; 1715 } 1716 1717 if (drvname) { 1718 driver = audio_driver_lookup(drvname); 1719 if (driver) { 1720 done = !audio_driver_init(s, driver, true, dev); 1721 } else { 1722 dolog ("Unknown audio driver `%s'\n", drvname); 1723 } 1724 } else { 1725 for (i = 0; audio_prio_list[i]; i++) { 1726 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1727 driver = audio_driver_lookup(audio_prio_list[i]); 1728 1729 if (e && driver) { 1730 s->dev = dev = e->dev; 1731 audio_validate_opts(dev, &error_abort); 1732 done = !audio_driver_init(s, driver, false, dev); 1733 if (done) { 1734 e->dev = NULL; 1735 break; 1736 } 1737 } 1738 } 1739 } 1740 audio_free_audiodev_list(&head); 1741 1742 if (!done) { 1743 driver = audio_driver_lookup("none"); 1744 done = !audio_driver_init(s, driver, false, dev); 1745 assert(done); 1746 dolog("warning: Using timer based audio emulation\n"); 1747 } 1748 1749 if (dev->timer_period <= 0) { 1750 s->period_ticks = 1; 1751 } else { 1752 s->period_ticks = dev->timer_period * (int64_t)SCALE_US; 1753 } 1754 1755 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1756 if (!e) { 1757 dolog ("warning: Could not register change state handler\n" 1758 "(Audio can continue looping even after stopping the VM)\n"); 1759 } 1760 1761 QLIST_INIT (&s->card_head); 1762 vmstate_register (NULL, 0, &vmstate_audio, s); 1763 return s; 1764 } 1765 1766 void audio_free_audiodev_list(AudiodevListHead *head) 1767 { 1768 AudiodevListEntry *e; 1769 while ((e = QSIMPLEQ_FIRST(head))) { 1770 QSIMPLEQ_REMOVE_HEAD(head, next); 1771 qapi_free_Audiodev(e->dev); 1772 g_free(e); 1773 } 1774 } 1775 1776 void AUD_register_card (const char *name, QEMUSoundCard *card) 1777 { 1778 if (!card->state) { 1779 card->state = audio_init(NULL, name); 1780 } 1781 1782 card->name = g_strdup (name); 1783 memset (&card->entries, 0, sizeof (card->entries)); 1784 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1785 } 1786 1787 void AUD_remove_card (QEMUSoundCard *card) 1788 { 1789 QLIST_REMOVE (card, entries); 1790 g_free (card->name); 1791 } 1792 1793 1794 CaptureVoiceOut *AUD_add_capture( 1795 AudioState *s, 1796 struct audsettings *as, 1797 struct audio_capture_ops *ops, 1798 void *cb_opaque 1799 ) 1800 { 1801 CaptureVoiceOut *cap; 1802 struct capture_callback *cb; 1803 1804 if (!s) { 1805 if (!legacy_config) { 1806 dolog("Capturing without setting an audiodev is deprecated\n"); 1807 } 1808 s = audio_init(NULL, NULL); 1809 } 1810 1811 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1812 dolog("Can't capture with mixeng disabled\n"); 1813 return NULL; 1814 } 1815 1816 if (audio_validate_settings (as)) { 1817 dolog ("Invalid settings were passed when trying to add capture\n"); 1818 audio_print_settings (as); 1819 return NULL; 1820 } 1821 1822 cb = g_malloc0(sizeof(*cb)); 1823 cb->ops = *ops; 1824 cb->opaque = cb_opaque; 1825 1826 cap = audio_pcm_capture_find_specific(s, as); 1827 if (cap) { 1828 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1829 return cap; 1830 } 1831 else { 1832 HWVoiceOut *hw; 1833 CaptureVoiceOut *cap; 1834 1835 cap = g_malloc0(sizeof(*cap)); 1836 1837 hw = &cap->hw; 1838 hw->s = s; 1839 QLIST_INIT (&hw->sw_head); 1840 QLIST_INIT (&cap->cb_head); 1841 1842 /* XXX find a more elegant way */ 1843 hw->samples = 4096 * 4; 1844 audio_pcm_hw_alloc_resources_out(hw); 1845 1846 audio_pcm_init_info (&hw->info, as); 1847 1848 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame); 1849 1850 if (hw->info.is_float) { 1851 hw->clip = mixeng_clip_float[hw->info.nchannels == 2]; 1852 } else { 1853 hw->clip = mixeng_clip 1854 [hw->info.nchannels == 2] 1855 [hw->info.is_signed] 1856 [hw->info.swap_endianness] 1857 [audio_bits_to_index(hw->info.bits)]; 1858 } 1859 1860 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1861 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1862 1863 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1864 audio_attach_capture (hw); 1865 } 1866 return cap; 1867 } 1868 } 1869 1870 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1871 { 1872 struct capture_callback *cb; 1873 1874 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1875 if (cb->opaque == cb_opaque) { 1876 cb->ops.destroy (cb_opaque); 1877 QLIST_REMOVE (cb, entries); 1878 g_free (cb); 1879 1880 if (!cap->cb_head.lh_first) { 1881 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1882 1883 while (sw) { 1884 SWVoiceCap *sc = (SWVoiceCap *) sw; 1885 #ifdef DEBUG_CAPTURE 1886 dolog ("freeing %s\n", sw->name); 1887 #endif 1888 1889 sw1 = sw->entries.le_next; 1890 if (sw->rate) { 1891 st_rate_stop (sw->rate); 1892 sw->rate = NULL; 1893 } 1894 QLIST_REMOVE (sw, entries); 1895 QLIST_REMOVE (sc, entries); 1896 g_free (sc); 1897 sw = sw1; 1898 } 1899 QLIST_REMOVE (cap, entries); 1900 g_free (cap->hw.mix_buf); 1901 g_free (cap->buf); 1902 g_free (cap); 1903 } 1904 return; 1905 } 1906 } 1907 } 1908 1909 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1910 { 1911 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1912 audio_set_volume_out(sw, &vol); 1913 } 1914 1915 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol) 1916 { 1917 if (sw) { 1918 HWVoiceOut *hw = sw->hw; 1919 1920 sw->vol.mute = vol->mute; 1921 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1922 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] / 1923 255; 1924 1925 if (hw->pcm_ops->volume_out) { 1926 hw->pcm_ops->volume_out(hw, vol); 1927 } 1928 } 1929 } 1930 1931 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1932 { 1933 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1934 audio_set_volume_in(sw, &vol); 1935 } 1936 1937 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol) 1938 { 1939 if (sw) { 1940 HWVoiceIn *hw = sw->hw; 1941 1942 sw->vol.mute = vol->mute; 1943 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1944 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] / 1945 255; 1946 1947 if (hw->pcm_ops->volume_in) { 1948 hw->pcm_ops->volume_in(hw, vol); 1949 } 1950 } 1951 } 1952 1953 void audio_create_pdos(Audiodev *dev) 1954 { 1955 switch (dev->driver) { 1956 #define CASE(DRIVER, driver, pdo_name) \ 1957 case AUDIODEV_DRIVER_##DRIVER: \ 1958 if (!dev->u.driver.has_in) { \ 1959 dev->u.driver.in = g_malloc0( \ 1960 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1961 dev->u.driver.has_in = true; \ 1962 } \ 1963 if (!dev->u.driver.has_out) { \ 1964 dev->u.driver.out = g_malloc0( \ 1965 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1966 dev->u.driver.has_out = true; \ 1967 } \ 1968 break 1969 1970 CASE(NONE, none, ); 1971 CASE(ALSA, alsa, Alsa); 1972 CASE(COREAUDIO, coreaudio, Coreaudio); 1973 CASE(DSOUND, dsound, ); 1974 CASE(OSS, oss, Oss); 1975 CASE(PA, pa, Pa); 1976 CASE(SDL, sdl, ); 1977 CASE(SPICE, spice, ); 1978 CASE(WAV, wav, ); 1979 1980 case AUDIODEV_DRIVER__MAX: 1981 abort(); 1982 }; 1983 } 1984 1985 static void audio_validate_per_direction_opts( 1986 AudiodevPerDirectionOptions *pdo, Error **errp) 1987 { 1988 if (!pdo->has_mixing_engine) { 1989 pdo->has_mixing_engine = true; 1990 pdo->mixing_engine = true; 1991 } 1992 if (!pdo->has_fixed_settings) { 1993 pdo->has_fixed_settings = true; 1994 pdo->fixed_settings = pdo->mixing_engine; 1995 } 1996 if (!pdo->fixed_settings && 1997 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 1998 error_setg(errp, 1999 "You can't use frequency, channels or format with fixed-settings=off"); 2000 return; 2001 } 2002 if (!pdo->mixing_engine && pdo->fixed_settings) { 2003 error_setg(errp, "You can't use fixed-settings without mixeng"); 2004 return; 2005 } 2006 2007 if (!pdo->has_frequency) { 2008 pdo->has_frequency = true; 2009 pdo->frequency = 44100; 2010 } 2011 if (!pdo->has_channels) { 2012 pdo->has_channels = true; 2013 pdo->channels = 2; 2014 } 2015 if (!pdo->has_voices) { 2016 pdo->has_voices = true; 2017 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX; 2018 } 2019 if (!pdo->has_format) { 2020 pdo->has_format = true; 2021 pdo->format = AUDIO_FORMAT_S16; 2022 } 2023 } 2024 2025 static void audio_validate_opts(Audiodev *dev, Error **errp) 2026 { 2027 Error *err = NULL; 2028 2029 audio_create_pdos(dev); 2030 2031 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 2032 if (err) { 2033 error_propagate(errp, err); 2034 return; 2035 } 2036 2037 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 2038 if (err) { 2039 error_propagate(errp, err); 2040 return; 2041 } 2042 2043 if (!dev->has_timer_period) { 2044 dev->has_timer_period = true; 2045 dev->timer_period = 10000; /* 100Hz -> 10ms */ 2046 } 2047 } 2048 2049 void audio_parse_option(const char *opt) 2050 { 2051 AudiodevListEntry *e; 2052 Audiodev *dev = NULL; 2053 2054 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 2055 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 2056 visit_free(v); 2057 2058 audio_validate_opts(dev, &error_fatal); 2059 2060 e = g_malloc0(sizeof(AudiodevListEntry)); 2061 e->dev = dev; 2062 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 2063 } 2064 2065 void audio_init_audiodevs(void) 2066 { 2067 AudiodevListEntry *e; 2068 2069 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2070 audio_init(e->dev, NULL); 2071 } 2072 } 2073 2074 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 2075 { 2076 return (audsettings) { 2077 .freq = pdo->frequency, 2078 .nchannels = pdo->channels, 2079 .fmt = pdo->format, 2080 .endianness = AUDIO_HOST_ENDIANNESS, 2081 }; 2082 } 2083 2084 int audioformat_bytes_per_sample(AudioFormat fmt) 2085 { 2086 switch (fmt) { 2087 case AUDIO_FORMAT_U8: 2088 case AUDIO_FORMAT_S8: 2089 return 1; 2090 2091 case AUDIO_FORMAT_U16: 2092 case AUDIO_FORMAT_S16: 2093 return 2; 2094 2095 case AUDIO_FORMAT_U32: 2096 case AUDIO_FORMAT_S32: 2097 case AUDIO_FORMAT_F32: 2098 return 4; 2099 2100 case AUDIO_FORMAT__MAX: 2101 ; 2102 } 2103 abort(); 2104 } 2105 2106 2107 /* frames = freq * usec / 1e6 */ 2108 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2109 audsettings *as, int def_usecs) 2110 { 2111 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2112 return (as->freq * usecs + 500000) / 1000000; 2113 } 2114 2115 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2116 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2117 audsettings *as, int def_usecs) 2118 { 2119 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2120 } 2121 2122 /* 2123 * bytes = bytes_per_sample * samples = 2124 * bytes_per_sample * channels * freq * usec / 1e6 2125 */ 2126 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2127 audsettings *as, int def_usecs) 2128 { 2129 return audio_buffer_samples(pdo, as, def_usecs) * 2130 audioformat_bytes_per_sample(as->fmt); 2131 } 2132 2133 AudioState *audio_state_by_name(const char *name) 2134 { 2135 AudioState *s; 2136 QTAILQ_FOREACH(s, &audio_states, list) { 2137 assert(s->dev); 2138 if (strcmp(name, s->dev->id) == 0) { 2139 return s; 2140 } 2141 } 2142 return NULL; 2143 } 2144 2145 const char *audio_get_id(QEMUSoundCard *card) 2146 { 2147 if (card->state) { 2148 assert(card->state->dev); 2149 return card->state->dev->id; 2150 } else { 2151 return ""; 2152 } 2153 } 2154 2155 void audio_rate_start(RateCtl *rate) 2156 { 2157 memset(rate, 0, sizeof(RateCtl)); 2158 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2159 } 2160 2161 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, 2162 size_t bytes_avail) 2163 { 2164 int64_t now; 2165 int64_t ticks; 2166 int64_t bytes; 2167 int64_t samples; 2168 size_t ret; 2169 2170 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2171 ticks = now - rate->start_ticks; 2172 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2173 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame; 2174 if (samples < 0 || samples > 65536) { 2175 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples); 2176 audio_rate_start(rate); 2177 samples = 0; 2178 } 2179 2180 ret = MIN(samples * info->bytes_per_frame, bytes_avail); 2181 rate->bytes_sent += ret; 2182 return ret; 2183 } 2184