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 && !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 && !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 = live * hw->info.bytes_per_frame; 1093 size_t decr, proc; 1094 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1095 1096 if (size == 0) { 1097 break; 1098 } 1099 1100 decr = MIN(size / hw->info.bytes_per_frame, live); 1101 if (buf) { 1102 audio_pcm_hw_clip_out(hw, buf, decr); 1103 } 1104 proc = hw->pcm_ops->put_buffer_out(hw, buf, 1105 decr * hw->info.bytes_per_frame) / 1106 hw->info.bytes_per_frame; 1107 1108 live -= proc; 1109 clipped += proc; 1110 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size; 1111 1112 if (proc == 0 || proc < decr) { 1113 break; 1114 } 1115 } 1116 1117 if (hw->pcm_ops->run_buffer_out) { 1118 hw->pcm_ops->run_buffer_out(hw); 1119 } 1120 1121 return clipped; 1122 } 1123 1124 static void audio_run_out (AudioState *s) 1125 { 1126 HWVoiceOut *hw = NULL; 1127 SWVoiceOut *sw; 1128 1129 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1130 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1131 /* there is exactly 1 sw for each hw with no mixeng */ 1132 sw = hw->sw_head.lh_first; 1133 1134 if (hw->pending_disable) { 1135 hw->enabled = 0; 1136 hw->pending_disable = 0; 1137 if (hw->pcm_ops->enable_out) { 1138 hw->pcm_ops->enable_out(hw, false); 1139 } 1140 } 1141 1142 if (sw->active) { 1143 sw->callback.fn(sw->callback.opaque, INT_MAX); 1144 } 1145 } 1146 return; 1147 } 1148 1149 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1150 size_t played, live, prev_rpos, free; 1151 int nb_live, cleanup_required; 1152 1153 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1154 if (!nb_live) { 1155 live = 0; 1156 } 1157 1158 if (audio_bug(__func__, live > hw->mix_buf->size)) { 1159 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 1160 continue; 1161 } 1162 1163 if (hw->pending_disable && !nb_live) { 1164 SWVoiceCap *sc; 1165 #ifdef DEBUG_OUT 1166 dolog ("Disabling voice\n"); 1167 #endif 1168 hw->enabled = 0; 1169 hw->pending_disable = 0; 1170 if (hw->pcm_ops->enable_out) { 1171 hw->pcm_ops->enable_out(hw, false); 1172 } 1173 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1174 sc->sw.active = 0; 1175 audio_recalc_and_notify_capture (sc->cap); 1176 } 1177 continue; 1178 } 1179 1180 if (!live) { 1181 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1182 if (sw->active) { 1183 free = audio_get_free (sw); 1184 if (free > 0) { 1185 sw->callback.fn (sw->callback.opaque, free); 1186 } 1187 } 1188 } 1189 continue; 1190 } 1191 1192 prev_rpos = hw->mix_buf->pos; 1193 played = audio_pcm_hw_run_out(hw, live); 1194 replay_audio_out(&played); 1195 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) { 1196 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n", 1197 hw->mix_buf->pos, hw->mix_buf->size, played); 1198 hw->mix_buf->pos = 0; 1199 } 1200 1201 #ifdef DEBUG_OUT 1202 dolog("played=%zu\n", played); 1203 #endif 1204 1205 if (played) { 1206 hw->ts_helper += played; 1207 audio_capture_mix_and_clear (hw, prev_rpos, played); 1208 } 1209 1210 cleanup_required = 0; 1211 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1212 if (!sw->active && sw->empty) { 1213 continue; 1214 } 1215 1216 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1217 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1218 played, sw->total_hw_samples_mixed); 1219 played = sw->total_hw_samples_mixed; 1220 } 1221 1222 sw->total_hw_samples_mixed -= played; 1223 1224 if (!sw->total_hw_samples_mixed) { 1225 sw->empty = 1; 1226 cleanup_required |= !sw->active && !sw->callback.fn; 1227 } 1228 1229 if (sw->active) { 1230 free = audio_get_free (sw); 1231 if (free > 0) { 1232 sw->callback.fn (sw->callback.opaque, free); 1233 } 1234 } 1235 } 1236 1237 if (cleanup_required) { 1238 SWVoiceOut *sw1; 1239 1240 sw = hw->sw_head.lh_first; 1241 while (sw) { 1242 sw1 = sw->entries.le_next; 1243 if (!sw->active && !sw->callback.fn) { 1244 audio_close_out (sw); 1245 } 1246 sw = sw1; 1247 } 1248 } 1249 } 1250 } 1251 1252 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1253 { 1254 size_t conv = 0; 1255 STSampleBuffer *conv_buf = hw->conv_buf; 1256 1257 while (samples) { 1258 size_t proc; 1259 size_t size = samples * hw->info.bytes_per_frame; 1260 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1261 1262 assert(size % hw->info.bytes_per_frame == 0); 1263 if (size == 0) { 1264 hw->pcm_ops->put_buffer_in(hw, buf, size); 1265 break; 1266 } 1267 1268 proc = MIN(size / hw->info.bytes_per_frame, 1269 conv_buf->size - conv_buf->pos); 1270 1271 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc); 1272 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 1273 1274 samples -= proc; 1275 conv += proc; 1276 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame); 1277 } 1278 1279 return conv; 1280 } 1281 1282 static void audio_run_in (AudioState *s) 1283 { 1284 HWVoiceIn *hw = NULL; 1285 1286 if (!audio_get_pdo_in(s->dev)->mixing_engine) { 1287 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1288 /* there is exactly 1 sw for each hw with no mixeng */ 1289 SWVoiceIn *sw = hw->sw_head.lh_first; 1290 if (sw->active) { 1291 sw->callback.fn(sw->callback.opaque, INT_MAX); 1292 } 1293 } 1294 return; 1295 } 1296 1297 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1298 SWVoiceIn *sw; 1299 size_t captured = 0, min; 1300 1301 if (replay_mode != REPLAY_MODE_PLAY) { 1302 captured = audio_pcm_hw_run_in( 1303 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw)); 1304 } 1305 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos, 1306 hw->conv_buf->size); 1307 1308 min = audio_pcm_hw_find_min_in (hw); 1309 hw->total_samples_captured += captured - min; 1310 hw->ts_helper += captured; 1311 1312 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1313 sw->total_hw_samples_acquired -= min; 1314 1315 if (sw->active) { 1316 size_t avail; 1317 1318 avail = audio_get_avail (sw); 1319 if (avail > 0) { 1320 sw->callback.fn (sw->callback.opaque, avail); 1321 } 1322 } 1323 } 1324 } 1325 } 1326 1327 static void audio_run_capture (AudioState *s) 1328 { 1329 CaptureVoiceOut *cap; 1330 1331 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1332 size_t live, rpos, captured; 1333 HWVoiceOut *hw = &cap->hw; 1334 SWVoiceOut *sw; 1335 1336 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1337 rpos = hw->mix_buf->pos; 1338 while (live) { 1339 size_t left = hw->mix_buf->size - rpos; 1340 size_t to_capture = MIN(live, left); 1341 struct st_sample *src; 1342 struct capture_callback *cb; 1343 1344 src = hw->mix_buf->samples + rpos; 1345 hw->clip (cap->buf, src, to_capture); 1346 mixeng_clear (src, to_capture); 1347 1348 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1349 cb->ops.capture (cb->opaque, cap->buf, 1350 to_capture * hw->info.bytes_per_frame); 1351 } 1352 rpos = (rpos + to_capture) % hw->mix_buf->size; 1353 live -= to_capture; 1354 } 1355 hw->mix_buf->pos = rpos; 1356 1357 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1358 if (!sw->active && sw->empty) { 1359 continue; 1360 } 1361 1362 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1363 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1364 captured, sw->total_hw_samples_mixed); 1365 captured = sw->total_hw_samples_mixed; 1366 } 1367 1368 sw->total_hw_samples_mixed -= captured; 1369 sw->empty = sw->total_hw_samples_mixed == 0; 1370 } 1371 } 1372 } 1373 1374 void audio_run(AudioState *s, const char *msg) 1375 { 1376 audio_run_out(s); 1377 audio_run_in(s); 1378 audio_run_capture(s); 1379 1380 #ifdef DEBUG_POLL 1381 { 1382 static double prevtime; 1383 double currtime; 1384 struct timeval tv; 1385 1386 if (gettimeofday (&tv, NULL)) { 1387 perror ("audio_run: gettimeofday"); 1388 return; 1389 } 1390 1391 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1392 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1393 prevtime = currtime; 1394 } 1395 #endif 1396 } 1397 1398 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1399 { 1400 ssize_t start; 1401 1402 if (unlikely(!hw->buf_emul)) { 1403 size_t calc_size = hw->conv_buf->size * hw->info.bytes_per_frame; 1404 hw->buf_emul = g_malloc(calc_size); 1405 hw->size_emul = calc_size; 1406 hw->pos_emul = hw->pending_emul = 0; 1407 } 1408 1409 while (hw->pending_emul < hw->size_emul) { 1410 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1411 hw->size_emul - hw->pending_emul); 1412 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1413 read_len); 1414 hw->pending_emul += read; 1415 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul; 1416 if (read < read_len) { 1417 break; 1418 } 1419 } 1420 1421 start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1422 if (start < 0) { 1423 start += hw->size_emul; 1424 } 1425 assert(start >= 0 && start < hw->size_emul); 1426 1427 *size = MIN(*size, hw->pending_emul); 1428 *size = MIN(*size, hw->size_emul - start); 1429 return hw->buf_emul + start; 1430 } 1431 1432 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1433 { 1434 assert(size <= hw->pending_emul); 1435 hw->pending_emul -= size; 1436 } 1437 1438 void audio_generic_run_buffer_out(HWVoiceOut *hw) 1439 { 1440 while (hw->pending_emul) { 1441 size_t write_len, written; 1442 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul; 1443 1444 if (start < 0) { 1445 start += hw->size_emul; 1446 } 1447 assert(start >= 0 && start < hw->size_emul); 1448 1449 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1450 1451 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1452 hw->pending_emul -= written; 1453 1454 if (written < write_len) { 1455 break; 1456 } 1457 } 1458 } 1459 1460 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1461 { 1462 if (unlikely(!hw->buf_emul)) { 1463 size_t calc_size = hw->mix_buf->size * hw->info.bytes_per_frame; 1464 1465 hw->buf_emul = g_malloc(calc_size); 1466 hw->size_emul = calc_size; 1467 hw->pos_emul = hw->pending_emul = 0; 1468 } 1469 1470 *size = MIN(hw->size_emul - hw->pending_emul, 1471 hw->size_emul - hw->pos_emul); 1472 return hw->buf_emul + hw->pos_emul; 1473 } 1474 1475 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1476 { 1477 assert(buf == hw->buf_emul + hw->pos_emul && 1478 size + hw->pending_emul <= hw->size_emul); 1479 1480 hw->pending_emul += size; 1481 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1482 1483 return size; 1484 } 1485 1486 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1487 { 1488 size_t dst_size, copy_size; 1489 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1490 copy_size = MIN(size, dst_size); 1491 1492 memcpy(dst, buf, copy_size); 1493 return hw->pcm_ops->put_buffer_out(hw, dst, copy_size); 1494 } 1495 1496 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1497 { 1498 void *src = hw->pcm_ops->get_buffer_in(hw, &size); 1499 1500 memcpy(buf, src, size); 1501 hw->pcm_ops->put_buffer_in(hw, src, size); 1502 1503 return size; 1504 } 1505 1506 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1507 bool msg, Audiodev *dev) 1508 { 1509 s->drv_opaque = drv->init(dev); 1510 1511 if (s->drv_opaque) { 1512 if (!drv->pcm_ops->get_buffer_in) { 1513 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1514 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1515 } 1516 if (!drv->pcm_ops->get_buffer_out) { 1517 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1518 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1519 } 1520 1521 audio_init_nb_voices_out(s, drv); 1522 audio_init_nb_voices_in(s, drv); 1523 s->drv = drv; 1524 return 0; 1525 } 1526 else { 1527 if (msg) { 1528 dolog("Could not init `%s' audio driver\n", drv->name); 1529 } 1530 return -1; 1531 } 1532 } 1533 1534 static void audio_vm_change_state_handler (void *opaque, int running, 1535 RunState state) 1536 { 1537 AudioState *s = opaque; 1538 HWVoiceOut *hwo = NULL; 1539 HWVoiceIn *hwi = NULL; 1540 1541 s->vm_running = running; 1542 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1543 if (hwo->pcm_ops->enable_out) { 1544 hwo->pcm_ops->enable_out(hwo, running); 1545 } 1546 } 1547 1548 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1549 if (hwi->pcm_ops->enable_in) { 1550 hwi->pcm_ops->enable_in(hwi, running); 1551 } 1552 } 1553 audio_reset_timer (s); 1554 } 1555 1556 static bool is_cleaning_up; 1557 1558 bool audio_is_cleaning_up(void) 1559 { 1560 return is_cleaning_up; 1561 } 1562 1563 static void free_audio_state(AudioState *s) 1564 { 1565 HWVoiceOut *hwo, *hwon; 1566 HWVoiceIn *hwi, *hwin; 1567 1568 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1569 SWVoiceCap *sc; 1570 1571 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1572 hwo->pcm_ops->enable_out(hwo, false); 1573 } 1574 hwo->pcm_ops->fini_out (hwo); 1575 1576 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1577 CaptureVoiceOut *cap = sc->cap; 1578 struct capture_callback *cb; 1579 1580 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1581 cb->ops.destroy (cb->opaque); 1582 } 1583 } 1584 QLIST_REMOVE(hwo, entries); 1585 } 1586 1587 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1588 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1589 hwi->pcm_ops->enable_in(hwi, false); 1590 } 1591 hwi->pcm_ops->fini_in (hwi); 1592 QLIST_REMOVE(hwi, entries); 1593 } 1594 1595 if (s->drv) { 1596 s->drv->fini (s->drv_opaque); 1597 s->drv = NULL; 1598 } 1599 1600 if (s->dev) { 1601 qapi_free_Audiodev(s->dev); 1602 s->dev = NULL; 1603 } 1604 1605 if (s->ts) { 1606 timer_free(s->ts); 1607 s->ts = NULL; 1608 } 1609 1610 g_free(s); 1611 } 1612 1613 void audio_cleanup(void) 1614 { 1615 is_cleaning_up = true; 1616 while (!QTAILQ_EMPTY(&audio_states)) { 1617 AudioState *s = QTAILQ_FIRST(&audio_states); 1618 QTAILQ_REMOVE(&audio_states, s, list); 1619 free_audio_state(s); 1620 } 1621 } 1622 1623 static const VMStateDescription vmstate_audio = { 1624 .name = "audio", 1625 .version_id = 1, 1626 .minimum_version_id = 1, 1627 .fields = (VMStateField[]) { 1628 VMSTATE_END_OF_LIST() 1629 } 1630 }; 1631 1632 static void audio_validate_opts(Audiodev *dev, Error **errp); 1633 1634 static AudiodevListEntry *audiodev_find( 1635 AudiodevListHead *head, const char *drvname) 1636 { 1637 AudiodevListEntry *e; 1638 QSIMPLEQ_FOREACH(e, head, next) { 1639 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1640 return e; 1641 } 1642 } 1643 1644 return NULL; 1645 } 1646 1647 /* 1648 * if we have dev, this function was called because of an -audiodev argument => 1649 * initialize a new state with it 1650 * if dev == NULL => legacy implicit initialization, return the already created 1651 * state or create a new one 1652 */ 1653 static AudioState *audio_init(Audiodev *dev, const char *name) 1654 { 1655 static bool atexit_registered; 1656 size_t i; 1657 int done = 0; 1658 const char *drvname = NULL; 1659 VMChangeStateEntry *e; 1660 AudioState *s; 1661 struct audio_driver *driver; 1662 /* silence gcc warning about uninitialized variable */ 1663 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1664 1665 if (dev) { 1666 /* -audiodev option */ 1667 legacy_config = false; 1668 drvname = AudiodevDriver_str(dev->driver); 1669 } else if (!QTAILQ_EMPTY(&audio_states)) { 1670 if (!legacy_config) { 1671 dolog("Device %s: audiodev default parameter is deprecated, please " 1672 "specify audiodev=%s\n", name, 1673 QTAILQ_FIRST(&audio_states)->dev->id); 1674 } 1675 return QTAILQ_FIRST(&audio_states); 1676 } else { 1677 /* legacy implicit initialization */ 1678 head = audio_handle_legacy_opts(); 1679 /* 1680 * In case of legacy initialization, all Audiodevs in the list will have 1681 * the same configuration (except the driver), so it doesn't matter which 1682 * one we chose. We need an Audiodev to set up AudioState before we can 1683 * init a driver. Also note that dev at this point is still in the 1684 * list. 1685 */ 1686 dev = QSIMPLEQ_FIRST(&head)->dev; 1687 audio_validate_opts(dev, &error_abort); 1688 } 1689 1690 s = g_malloc0(sizeof(AudioState)); 1691 s->dev = dev; 1692 1693 QLIST_INIT (&s->hw_head_out); 1694 QLIST_INIT (&s->hw_head_in); 1695 QLIST_INIT (&s->cap_head); 1696 if (!atexit_registered) { 1697 atexit(audio_cleanup); 1698 atexit_registered = true; 1699 } 1700 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1701 1702 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1703 1704 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1705 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1706 1707 if (s->nb_hw_voices_out <= 0) { 1708 dolog ("Bogus number of playback voices %d, setting to 1\n", 1709 s->nb_hw_voices_out); 1710 s->nb_hw_voices_out = 1; 1711 } 1712 1713 if (s->nb_hw_voices_in <= 0) { 1714 dolog ("Bogus number of capture voices %d, setting to 0\n", 1715 s->nb_hw_voices_in); 1716 s->nb_hw_voices_in = 0; 1717 } 1718 1719 if (drvname) { 1720 driver = audio_driver_lookup(drvname); 1721 if (driver) { 1722 done = !audio_driver_init(s, driver, true, dev); 1723 } else { 1724 dolog ("Unknown audio driver `%s'\n", drvname); 1725 } 1726 } else { 1727 for (i = 0; audio_prio_list[i]; i++) { 1728 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1729 driver = audio_driver_lookup(audio_prio_list[i]); 1730 1731 if (e && driver) { 1732 s->dev = dev = e->dev; 1733 audio_validate_opts(dev, &error_abort); 1734 done = !audio_driver_init(s, driver, false, dev); 1735 if (done) { 1736 e->dev = NULL; 1737 break; 1738 } 1739 } 1740 } 1741 } 1742 audio_free_audiodev_list(&head); 1743 1744 if (!done) { 1745 driver = audio_driver_lookup("none"); 1746 done = !audio_driver_init(s, driver, false, dev); 1747 assert(done); 1748 dolog("warning: Using timer based audio emulation\n"); 1749 } 1750 1751 if (dev->timer_period <= 0) { 1752 s->period_ticks = 1; 1753 } else { 1754 s->period_ticks = dev->timer_period * (int64_t)SCALE_US; 1755 } 1756 1757 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1758 if (!e) { 1759 dolog ("warning: Could not register change state handler\n" 1760 "(Audio can continue looping even after stopping the VM)\n"); 1761 } 1762 1763 QLIST_INIT (&s->card_head); 1764 vmstate_register (NULL, 0, &vmstate_audio, s); 1765 return s; 1766 } 1767 1768 void audio_free_audiodev_list(AudiodevListHead *head) 1769 { 1770 AudiodevListEntry *e; 1771 while ((e = QSIMPLEQ_FIRST(head))) { 1772 QSIMPLEQ_REMOVE_HEAD(head, next); 1773 qapi_free_Audiodev(e->dev); 1774 g_free(e); 1775 } 1776 } 1777 1778 void AUD_register_card (const char *name, QEMUSoundCard *card) 1779 { 1780 if (!card->state) { 1781 card->state = audio_init(NULL, name); 1782 } 1783 1784 card->name = g_strdup (name); 1785 memset (&card->entries, 0, sizeof (card->entries)); 1786 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1787 } 1788 1789 void AUD_remove_card (QEMUSoundCard *card) 1790 { 1791 QLIST_REMOVE (card, entries); 1792 g_free (card->name); 1793 } 1794 1795 1796 CaptureVoiceOut *AUD_add_capture( 1797 AudioState *s, 1798 struct audsettings *as, 1799 struct audio_capture_ops *ops, 1800 void *cb_opaque 1801 ) 1802 { 1803 CaptureVoiceOut *cap; 1804 struct capture_callback *cb; 1805 1806 if (!s) { 1807 if (!legacy_config) { 1808 dolog("Capturing without setting an audiodev is deprecated\n"); 1809 } 1810 s = audio_init(NULL, NULL); 1811 } 1812 1813 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1814 dolog("Can't capture with mixeng disabled\n"); 1815 return NULL; 1816 } 1817 1818 if (audio_validate_settings (as)) { 1819 dolog ("Invalid settings were passed when trying to add capture\n"); 1820 audio_print_settings (as); 1821 return NULL; 1822 } 1823 1824 cb = g_malloc0(sizeof(*cb)); 1825 cb->ops = *ops; 1826 cb->opaque = cb_opaque; 1827 1828 cap = audio_pcm_capture_find_specific(s, as); 1829 if (cap) { 1830 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1831 return cap; 1832 } 1833 else { 1834 HWVoiceOut *hw; 1835 CaptureVoiceOut *cap; 1836 1837 cap = g_malloc0(sizeof(*cap)); 1838 1839 hw = &cap->hw; 1840 hw->s = s; 1841 QLIST_INIT (&hw->sw_head); 1842 QLIST_INIT (&cap->cb_head); 1843 1844 /* XXX find a more elegant way */ 1845 hw->samples = 4096 * 4; 1846 audio_pcm_hw_alloc_resources_out(hw); 1847 1848 audio_pcm_init_info (&hw->info, as); 1849 1850 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame); 1851 1852 if (hw->info.is_float) { 1853 hw->clip = mixeng_clip_float[hw->info.nchannels == 2]; 1854 } else { 1855 hw->clip = mixeng_clip 1856 [hw->info.nchannels == 2] 1857 [hw->info.is_signed] 1858 [hw->info.swap_endianness] 1859 [audio_bits_to_index(hw->info.bits)]; 1860 } 1861 1862 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1863 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1864 1865 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1866 audio_attach_capture (hw); 1867 } 1868 return cap; 1869 } 1870 } 1871 1872 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1873 { 1874 struct capture_callback *cb; 1875 1876 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1877 if (cb->opaque == cb_opaque) { 1878 cb->ops.destroy (cb_opaque); 1879 QLIST_REMOVE (cb, entries); 1880 g_free (cb); 1881 1882 if (!cap->cb_head.lh_first) { 1883 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1884 1885 while (sw) { 1886 SWVoiceCap *sc = (SWVoiceCap *) sw; 1887 #ifdef DEBUG_CAPTURE 1888 dolog ("freeing %s\n", sw->name); 1889 #endif 1890 1891 sw1 = sw->entries.le_next; 1892 if (sw->rate) { 1893 st_rate_stop (sw->rate); 1894 sw->rate = NULL; 1895 } 1896 QLIST_REMOVE (sw, entries); 1897 QLIST_REMOVE (sc, entries); 1898 g_free (sc); 1899 sw = sw1; 1900 } 1901 QLIST_REMOVE (cap, entries); 1902 g_free (cap->hw.mix_buf); 1903 g_free (cap->buf); 1904 g_free (cap); 1905 } 1906 return; 1907 } 1908 } 1909 } 1910 1911 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1912 { 1913 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1914 audio_set_volume_out(sw, &vol); 1915 } 1916 1917 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol) 1918 { 1919 if (sw) { 1920 HWVoiceOut *hw = sw->hw; 1921 1922 sw->vol.mute = vol->mute; 1923 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1924 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] / 1925 255; 1926 1927 if (hw->pcm_ops->volume_out) { 1928 hw->pcm_ops->volume_out(hw, vol); 1929 } 1930 } 1931 } 1932 1933 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 1934 { 1935 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1936 audio_set_volume_in(sw, &vol); 1937 } 1938 1939 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol) 1940 { 1941 if (sw) { 1942 HWVoiceIn *hw = sw->hw; 1943 1944 sw->vol.mute = vol->mute; 1945 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1946 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] / 1947 255; 1948 1949 if (hw->pcm_ops->volume_in) { 1950 hw->pcm_ops->volume_in(hw, vol); 1951 } 1952 } 1953 } 1954 1955 void audio_create_pdos(Audiodev *dev) 1956 { 1957 switch (dev->driver) { 1958 #define CASE(DRIVER, driver, pdo_name) \ 1959 case AUDIODEV_DRIVER_##DRIVER: \ 1960 if (!dev->u.driver.has_in) { \ 1961 dev->u.driver.in = g_malloc0( \ 1962 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1963 dev->u.driver.has_in = true; \ 1964 } \ 1965 if (!dev->u.driver.has_out) { \ 1966 dev->u.driver.out = g_malloc0( \ 1967 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 1968 dev->u.driver.has_out = true; \ 1969 } \ 1970 break 1971 1972 CASE(NONE, none, ); 1973 CASE(ALSA, alsa, Alsa); 1974 CASE(COREAUDIO, coreaudio, Coreaudio); 1975 CASE(DSOUND, dsound, ); 1976 CASE(JACK, jack, Jack); 1977 CASE(OSS, oss, Oss); 1978 CASE(PA, pa, Pa); 1979 CASE(SDL, sdl, ); 1980 CASE(SPICE, spice, ); 1981 CASE(WAV, wav, ); 1982 1983 case AUDIODEV_DRIVER__MAX: 1984 abort(); 1985 }; 1986 } 1987 1988 static void audio_validate_per_direction_opts( 1989 AudiodevPerDirectionOptions *pdo, Error **errp) 1990 { 1991 if (!pdo->has_mixing_engine) { 1992 pdo->has_mixing_engine = true; 1993 pdo->mixing_engine = true; 1994 } 1995 if (!pdo->has_fixed_settings) { 1996 pdo->has_fixed_settings = true; 1997 pdo->fixed_settings = pdo->mixing_engine; 1998 } 1999 if (!pdo->fixed_settings && 2000 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 2001 error_setg(errp, 2002 "You can't use frequency, channels or format with fixed-settings=off"); 2003 return; 2004 } 2005 if (!pdo->mixing_engine && pdo->fixed_settings) { 2006 error_setg(errp, "You can't use fixed-settings without mixeng"); 2007 return; 2008 } 2009 2010 if (!pdo->has_frequency) { 2011 pdo->has_frequency = true; 2012 pdo->frequency = 44100; 2013 } 2014 if (!pdo->has_channels) { 2015 pdo->has_channels = true; 2016 pdo->channels = 2; 2017 } 2018 if (!pdo->has_voices) { 2019 pdo->has_voices = true; 2020 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX; 2021 } 2022 if (!pdo->has_format) { 2023 pdo->has_format = true; 2024 pdo->format = AUDIO_FORMAT_S16; 2025 } 2026 } 2027 2028 static void audio_validate_opts(Audiodev *dev, Error **errp) 2029 { 2030 Error *err = NULL; 2031 2032 audio_create_pdos(dev); 2033 2034 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 2035 if (err) { 2036 error_propagate(errp, err); 2037 return; 2038 } 2039 2040 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 2041 if (err) { 2042 error_propagate(errp, err); 2043 return; 2044 } 2045 2046 if (!dev->has_timer_period) { 2047 dev->has_timer_period = true; 2048 dev->timer_period = 10000; /* 100Hz -> 10ms */ 2049 } 2050 } 2051 2052 void audio_parse_option(const char *opt) 2053 { 2054 AudiodevListEntry *e; 2055 Audiodev *dev = NULL; 2056 2057 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 2058 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 2059 visit_free(v); 2060 2061 audio_validate_opts(dev, &error_fatal); 2062 2063 e = g_malloc0(sizeof(AudiodevListEntry)); 2064 e->dev = dev; 2065 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 2066 } 2067 2068 void audio_init_audiodevs(void) 2069 { 2070 AudiodevListEntry *e; 2071 2072 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2073 audio_init(e->dev, NULL); 2074 } 2075 } 2076 2077 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 2078 { 2079 return (audsettings) { 2080 .freq = pdo->frequency, 2081 .nchannels = pdo->channels, 2082 .fmt = pdo->format, 2083 .endianness = AUDIO_HOST_ENDIANNESS, 2084 }; 2085 } 2086 2087 int audioformat_bytes_per_sample(AudioFormat fmt) 2088 { 2089 switch (fmt) { 2090 case AUDIO_FORMAT_U8: 2091 case AUDIO_FORMAT_S8: 2092 return 1; 2093 2094 case AUDIO_FORMAT_U16: 2095 case AUDIO_FORMAT_S16: 2096 return 2; 2097 2098 case AUDIO_FORMAT_U32: 2099 case AUDIO_FORMAT_S32: 2100 case AUDIO_FORMAT_F32: 2101 return 4; 2102 2103 case AUDIO_FORMAT__MAX: 2104 ; 2105 } 2106 abort(); 2107 } 2108 2109 2110 /* frames = freq * usec / 1e6 */ 2111 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2112 audsettings *as, int def_usecs) 2113 { 2114 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2115 return (as->freq * usecs + 500000) / 1000000; 2116 } 2117 2118 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2119 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2120 audsettings *as, int def_usecs) 2121 { 2122 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2123 } 2124 2125 /* 2126 * bytes = bytes_per_sample * samples = 2127 * bytes_per_sample * channels * freq * usec / 1e6 2128 */ 2129 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2130 audsettings *as, int def_usecs) 2131 { 2132 return audio_buffer_samples(pdo, as, def_usecs) * 2133 audioformat_bytes_per_sample(as->fmt); 2134 } 2135 2136 AudioState *audio_state_by_name(const char *name) 2137 { 2138 AudioState *s; 2139 QTAILQ_FOREACH(s, &audio_states, list) { 2140 assert(s->dev); 2141 if (strcmp(name, s->dev->id) == 0) { 2142 return s; 2143 } 2144 } 2145 return NULL; 2146 } 2147 2148 const char *audio_get_id(QEMUSoundCard *card) 2149 { 2150 if (card->state) { 2151 assert(card->state->dev); 2152 return card->state->dev->id; 2153 } else { 2154 return ""; 2155 } 2156 } 2157 2158 void audio_rate_start(RateCtl *rate) 2159 { 2160 memset(rate, 0, sizeof(RateCtl)); 2161 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2162 } 2163 2164 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate, 2165 size_t bytes_avail) 2166 { 2167 int64_t now; 2168 int64_t ticks; 2169 int64_t bytes; 2170 int64_t samples; 2171 size_t ret; 2172 2173 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2174 ticks = now - rate->start_ticks; 2175 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2176 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame; 2177 if (samples < 0 || samples > 65536) { 2178 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples); 2179 audio_rate_start(rate); 2180 samples = 0; 2181 } 2182 2183 ret = MIN(samples * info->bytes_per_frame, bytes_avail); 2184 rate->bytes_sent += ret; 2185 return ret; 2186 } 2187