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 "qemu/help_option.h" 36 #include "sysemu/sysemu.h" 37 #include "sysemu/replay.h" 38 #include "sysemu/runstate.h" 39 #include "ui/qemu-spice.h" 40 #include "trace.h" 41 42 #define AUDIO_CAP "audio" 43 #include "audio_int.h" 44 45 /* #define DEBUG_LIVE */ 46 /* #define DEBUG_OUT */ 47 /* #define DEBUG_CAPTURE */ 48 /* #define DEBUG_POLL */ 49 50 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 51 52 53 /* Order of CONFIG_AUDIO_DRIVERS is import. 54 The 1st one is the one used by default, that is the reason 55 that we generate the list. 56 */ 57 const char *audio_prio_list[] = { 58 "spice", 59 CONFIG_AUDIO_DRIVERS 60 "none", 61 "wav", 62 NULL 63 }; 64 65 static QLIST_HEAD(, audio_driver) audio_drivers; 66 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 67 68 void audio_driver_register(audio_driver *drv) 69 { 70 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 71 } 72 73 audio_driver *audio_driver_lookup(const char *name) 74 { 75 struct audio_driver *d; 76 Error *local_err = NULL; 77 int rv; 78 79 QLIST_FOREACH(d, &audio_drivers, next) { 80 if (strcmp(name, d->name) == 0) { 81 return d; 82 } 83 } 84 rv = audio_module_load(name, &local_err); 85 if (rv > 0) { 86 QLIST_FOREACH(d, &audio_drivers, next) { 87 if (strcmp(name, d->name) == 0) { 88 return d; 89 } 90 } 91 } else if (rv < 0) { 92 error_report_err(local_err); 93 } 94 return NULL; 95 } 96 97 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states = 98 QTAILQ_HEAD_INITIALIZER(audio_states); 99 100 const struct mixeng_volume nominal_volume = { 101 .mute = 0, 102 #ifdef FLOAT_MIXENG 103 .r = 1.0, 104 .l = 1.0, 105 #else 106 .r = 1ULL << 32, 107 .l = 1ULL << 32, 108 #endif 109 }; 110 111 static bool legacy_config = true; 112 113 int audio_bug (const char *funcname, int cond) 114 { 115 if (cond) { 116 static int shown; 117 118 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 119 if (!shown) { 120 shown = 1; 121 AUD_log (NULL, "Save all your work and restart without audio\n"); 122 AUD_log (NULL, "I am sorry\n"); 123 } 124 AUD_log (NULL, "Context:\n"); 125 } 126 127 return cond; 128 } 129 130 static inline int audio_bits_to_index (int bits) 131 { 132 switch (bits) { 133 case 8: 134 return 0; 135 136 case 16: 137 return 1; 138 139 case 32: 140 return 2; 141 142 default: 143 audio_bug ("bits_to_index", 1); 144 AUD_log (NULL, "invalid bits %d\n", bits); 145 return 0; 146 } 147 } 148 149 void *audio_calloc (const char *funcname, int nmemb, size_t size) 150 { 151 int cond; 152 size_t len; 153 154 len = nmemb * size; 155 cond = !nmemb || !size; 156 cond |= nmemb < 0; 157 cond |= len < size; 158 159 if (audio_bug ("audio_calloc", cond)) { 160 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", 161 funcname); 162 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); 163 return NULL; 164 } 165 166 return g_malloc0 (len); 167 } 168 169 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 170 { 171 if (cap) { 172 fprintf(stderr, "%s: ", cap); 173 } 174 175 vfprintf(stderr, fmt, ap); 176 } 177 178 void AUD_log (const char *cap, const char *fmt, ...) 179 { 180 va_list ap; 181 182 va_start (ap, fmt); 183 AUD_vlog (cap, fmt, ap); 184 va_end (ap); 185 } 186 187 static void audio_print_settings (struct audsettings *as) 188 { 189 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 190 191 switch (as->fmt) { 192 case AUDIO_FORMAT_S8: 193 AUD_log (NULL, "S8"); 194 break; 195 case AUDIO_FORMAT_U8: 196 AUD_log (NULL, "U8"); 197 break; 198 case AUDIO_FORMAT_S16: 199 AUD_log (NULL, "S16"); 200 break; 201 case AUDIO_FORMAT_U16: 202 AUD_log (NULL, "U16"); 203 break; 204 case AUDIO_FORMAT_S32: 205 AUD_log (NULL, "S32"); 206 break; 207 case AUDIO_FORMAT_U32: 208 AUD_log (NULL, "U32"); 209 break; 210 case AUDIO_FORMAT_F32: 211 AUD_log (NULL, "F32"); 212 break; 213 default: 214 AUD_log (NULL, "invalid(%d)", as->fmt); 215 break; 216 } 217 218 AUD_log (NULL, " endianness="); 219 switch (as->endianness) { 220 case 0: 221 AUD_log (NULL, "little"); 222 break; 223 case 1: 224 AUD_log (NULL, "big"); 225 break; 226 default: 227 AUD_log (NULL, "invalid"); 228 break; 229 } 230 AUD_log (NULL, "\n"); 231 } 232 233 static int audio_validate_settings (struct audsettings *as) 234 { 235 int invalid; 236 237 invalid = as->nchannels < 1; 238 invalid |= as->endianness != 0 && as->endianness != 1; 239 240 switch (as->fmt) { 241 case AUDIO_FORMAT_S8: 242 case AUDIO_FORMAT_U8: 243 case AUDIO_FORMAT_S16: 244 case AUDIO_FORMAT_U16: 245 case AUDIO_FORMAT_S32: 246 case AUDIO_FORMAT_U32: 247 case AUDIO_FORMAT_F32: 248 break; 249 default: 250 invalid = 1; 251 break; 252 } 253 254 invalid |= as->freq <= 0; 255 return invalid ? -1 : 0; 256 } 257 258 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 259 { 260 int bits = 8; 261 bool is_signed = false, is_float = false; 262 263 switch (as->fmt) { 264 case AUDIO_FORMAT_S8: 265 is_signed = true; 266 /* fall through */ 267 case AUDIO_FORMAT_U8: 268 break; 269 270 case AUDIO_FORMAT_S16: 271 is_signed = true; 272 /* fall through */ 273 case AUDIO_FORMAT_U16: 274 bits = 16; 275 break; 276 277 case AUDIO_FORMAT_F32: 278 is_float = true; 279 /* fall through */ 280 case AUDIO_FORMAT_S32: 281 is_signed = true; 282 /* fall through */ 283 case AUDIO_FORMAT_U32: 284 bits = 32; 285 break; 286 287 default: 288 abort(); 289 } 290 return info->freq == as->freq 291 && info->nchannels == as->nchannels 292 && info->is_signed == is_signed 293 && info->is_float == is_float 294 && info->bits == bits 295 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 296 } 297 298 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 299 { 300 int bits = 8, mul; 301 bool is_signed = false, is_float = false; 302 303 switch (as->fmt) { 304 case AUDIO_FORMAT_S8: 305 is_signed = true; 306 /* fall through */ 307 case AUDIO_FORMAT_U8: 308 mul = 1; 309 break; 310 311 case AUDIO_FORMAT_S16: 312 is_signed = true; 313 /* fall through */ 314 case AUDIO_FORMAT_U16: 315 bits = 16; 316 mul = 2; 317 break; 318 319 case AUDIO_FORMAT_F32: 320 is_float = true; 321 /* fall through */ 322 case AUDIO_FORMAT_S32: 323 is_signed = true; 324 /* fall through */ 325 case AUDIO_FORMAT_U32: 326 bits = 32; 327 mul = 4; 328 break; 329 330 default: 331 abort(); 332 } 333 334 info->freq = as->freq; 335 info->bits = bits; 336 info->is_signed = is_signed; 337 info->is_float = is_float; 338 info->nchannels = as->nchannels; 339 info->bytes_per_frame = as->nchannels * mul; 340 info->bytes_per_second = info->freq * info->bytes_per_frame; 341 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 342 } 343 344 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 345 { 346 if (!len) { 347 return; 348 } 349 350 if (info->is_signed || info->is_float) { 351 memset(buf, 0x00, len * info->bytes_per_frame); 352 } else { 353 switch (info->bits) { 354 case 8: 355 memset(buf, 0x80, len * info->bytes_per_frame); 356 break; 357 358 case 16: 359 { 360 int i; 361 uint16_t *p = buf; 362 short s = INT16_MAX; 363 364 if (info->swap_endianness) { 365 s = bswap16 (s); 366 } 367 368 for (i = 0; i < len * info->nchannels; i++) { 369 p[i] = s; 370 } 371 } 372 break; 373 374 case 32: 375 { 376 int i; 377 uint32_t *p = buf; 378 int32_t s = INT32_MAX; 379 380 if (info->swap_endianness) { 381 s = bswap32 (s); 382 } 383 384 for (i = 0; i < len * info->nchannels; i++) { 385 p[i] = s; 386 } 387 } 388 break; 389 390 default: 391 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 392 info->bits); 393 break; 394 } 395 } 396 } 397 398 /* 399 * Capture 400 */ 401 static void noop_conv (struct st_sample *dst, const void *src, int samples) 402 { 403 (void) src; 404 (void) dst; 405 (void) samples; 406 } 407 408 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s, 409 struct audsettings *as) 410 { 411 CaptureVoiceOut *cap; 412 413 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 414 if (audio_pcm_info_eq (&cap->hw.info, as)) { 415 return cap; 416 } 417 } 418 return NULL; 419 } 420 421 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 422 { 423 struct capture_callback *cb; 424 425 #ifdef DEBUG_CAPTURE 426 dolog ("notification %d sent\n", cmd); 427 #endif 428 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 429 cb->ops.notify (cb->opaque, cmd); 430 } 431 } 432 433 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 434 { 435 if (cap->hw.enabled != enabled) { 436 audcnotification_e cmd; 437 cap->hw.enabled = enabled; 438 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 439 audio_notify_capture (cap, cmd); 440 } 441 } 442 443 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 444 { 445 HWVoiceOut *hw = &cap->hw; 446 SWVoiceOut *sw; 447 int enabled = 0; 448 449 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 450 if (sw->active) { 451 enabled = 1; 452 break; 453 } 454 } 455 audio_capture_maybe_changed (cap, enabled); 456 } 457 458 static void audio_detach_capture (HWVoiceOut *hw) 459 { 460 SWVoiceCap *sc = hw->cap_head.lh_first; 461 462 while (sc) { 463 SWVoiceCap *sc1 = sc->entries.le_next; 464 SWVoiceOut *sw = &sc->sw; 465 CaptureVoiceOut *cap = sc->cap; 466 int was_active = sw->active; 467 468 if (sw->rate) { 469 st_rate_stop (sw->rate); 470 sw->rate = NULL; 471 } 472 473 QLIST_REMOVE (sw, entries); 474 QLIST_REMOVE (sc, entries); 475 g_free (sc); 476 if (was_active) { 477 /* We have removed soft voice from the capture: 478 this might have changed the overall status of the capture 479 since this might have been the only active voice */ 480 audio_recalc_and_notify_capture (cap); 481 } 482 sc = sc1; 483 } 484 } 485 486 static int audio_attach_capture (HWVoiceOut *hw) 487 { 488 AudioState *s = hw->s; 489 CaptureVoiceOut *cap; 490 491 audio_detach_capture (hw); 492 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 493 SWVoiceCap *sc; 494 SWVoiceOut *sw; 495 HWVoiceOut *hw_cap = &cap->hw; 496 497 sc = g_malloc0(sizeof(*sc)); 498 499 sc->cap = cap; 500 sw = &sc->sw; 501 sw->hw = hw_cap; 502 sw->info = hw->info; 503 sw->empty = 1; 504 sw->active = hw->enabled; 505 sw->conv = noop_conv; 506 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq; 507 sw->vol = nominal_volume; 508 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 509 if (!sw->rate) { 510 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)); 511 g_free (sw); 512 return -1; 513 } 514 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 515 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 516 #ifdef DEBUG_CAPTURE 517 sw->name = g_strdup_printf ("for %p %d,%d,%d", 518 hw, sw->info.freq, sw->info.bits, 519 sw->info.nchannels); 520 dolog ("Added %s active = %d\n", sw->name, sw->active); 521 #endif 522 if (sw->active) { 523 audio_capture_maybe_changed (cap, 1); 524 } 525 } 526 return 0; 527 } 528 529 /* 530 * Hard voice (capture) 531 */ 532 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw) 533 { 534 SWVoiceIn *sw; 535 size_t m = hw->total_samples_captured; 536 537 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 538 if (sw->active) { 539 m = MIN (m, sw->total_hw_samples_acquired); 540 } 541 } 542 return m; 543 } 544 545 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw) 546 { 547 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 548 if (audio_bug(__func__, live > hw->conv_buf->size)) { 549 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 550 return 0; 551 } 552 return live; 553 } 554 555 static size_t audio_pcm_hw_conv_in(HWVoiceIn *hw, void *pcm_buf, size_t samples) 556 { 557 size_t conv = 0; 558 STSampleBuffer *conv_buf = hw->conv_buf; 559 560 while (samples) { 561 uint8_t *src = advance(pcm_buf, conv * hw->info.bytes_per_frame); 562 size_t proc = MIN(samples, conv_buf->size - conv_buf->pos); 563 564 hw->conv(conv_buf->samples + conv_buf->pos, src, proc); 565 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 566 samples -= proc; 567 conv += proc; 568 } 569 570 return conv; 571 } 572 573 /* 574 * Soft voice (capture) 575 */ 576 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size) 577 { 578 HWVoiceIn *hw = sw->hw; 579 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; 580 struct st_sample *src, *dst = sw->buf; 581 582 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 583 if (!live) { 584 return 0; 585 } 586 if (audio_bug(__func__, live > hw->conv_buf->size)) { 587 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size); 588 return 0; 589 } 590 591 rpos = audio_ring_posb(hw->conv_buf->pos, live, hw->conv_buf->size); 592 593 samples = size / sw->info.bytes_per_frame; 594 595 swlim = (live * sw->ratio) >> 32; 596 swlim = MIN (swlim, samples); 597 598 while (swlim) { 599 src = hw->conv_buf->samples + rpos; 600 if (hw->conv_buf->pos > rpos) { 601 isamp = hw->conv_buf->pos - rpos; 602 } else { 603 isamp = hw->conv_buf->size - rpos; 604 } 605 606 if (!isamp) { 607 break; 608 } 609 osamp = swlim; 610 611 st_rate_flow (sw->rate, src, dst, &isamp, &osamp); 612 swlim -= osamp; 613 rpos = (rpos + isamp) % hw->conv_buf->size; 614 dst += osamp; 615 ret += osamp; 616 total += isamp; 617 } 618 619 if (!hw->pcm_ops->volume_in) { 620 mixeng_volume (sw->buf, ret, &sw->vol); 621 } 622 623 sw->clip (buf, sw->buf, ret); 624 sw->total_hw_samples_acquired += total; 625 return ret * sw->info.bytes_per_frame; 626 } 627 628 /* 629 * Hard voice (playback) 630 */ 631 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 632 { 633 SWVoiceOut *sw; 634 size_t m = SIZE_MAX; 635 int nb_live = 0; 636 637 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 638 if (sw->active || !sw->empty) { 639 m = MIN (m, sw->total_hw_samples_mixed); 640 nb_live += 1; 641 } 642 } 643 644 *nb_livep = nb_live; 645 return m; 646 } 647 648 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 649 { 650 size_t smin; 651 int nb_live1; 652 653 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 654 if (nb_live) { 655 *nb_live = nb_live1; 656 } 657 658 if (nb_live1) { 659 size_t live = smin; 660 661 if (audio_bug(__func__, live > hw->mix_buf->size)) { 662 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 663 return 0; 664 } 665 return live; 666 } 667 return 0; 668 } 669 670 static size_t audio_pcm_hw_get_free(HWVoiceOut *hw) 671 { 672 return (hw->pcm_ops->buffer_get_free ? hw->pcm_ops->buffer_get_free(hw) : 673 INT_MAX) / hw->info.bytes_per_frame; 674 } 675 676 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len) 677 { 678 size_t clipped = 0; 679 size_t pos = hw->mix_buf->pos; 680 681 while (len) { 682 st_sample *src = hw->mix_buf->samples + pos; 683 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame); 684 size_t samples_till_end_of_buf = hw->mix_buf->size - pos; 685 size_t samples_to_clip = MIN(len, samples_till_end_of_buf); 686 687 hw->clip(dst, src, samples_to_clip); 688 689 pos = (pos + samples_to_clip) % hw->mix_buf->size; 690 len -= samples_to_clip; 691 clipped += samples_to_clip; 692 } 693 } 694 695 /* 696 * Soft voice (playback) 697 */ 698 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size) 699 { 700 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, blck; 701 size_t hw_free; 702 size_t ret = 0, pos = 0, total = 0; 703 704 if (!sw) { 705 return size; 706 } 707 708 hwsamples = sw->hw->mix_buf->size; 709 710 live = sw->total_hw_samples_mixed; 711 if (audio_bug(__func__, live > hwsamples)) { 712 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples); 713 return 0; 714 } 715 716 if (live == hwsamples) { 717 #ifdef DEBUG_OUT 718 dolog ("%s is full %zu\n", sw->name, live); 719 #endif 720 return 0; 721 } 722 723 wpos = (sw->hw->mix_buf->pos + live) % hwsamples; 724 725 dead = hwsamples - live; 726 hw_free = audio_pcm_hw_get_free(sw->hw); 727 hw_free = hw_free > live ? hw_free - live : 0; 728 samples = ((int64_t)MIN(dead, hw_free) << 32) / sw->ratio; 729 samples = MIN(samples, size / sw->info.bytes_per_frame); 730 if (samples) { 731 sw->conv(sw->buf, buf, samples); 732 733 if (!sw->hw->pcm_ops->volume_out) { 734 mixeng_volume(sw->buf, samples, &sw->vol); 735 } 736 } 737 738 while (samples) { 739 dead = hwsamples - live; 740 left = hwsamples - wpos; 741 blck = MIN (dead, left); 742 if (!blck) { 743 break; 744 } 745 isamp = samples; 746 osamp = blck; 747 st_rate_flow_mix ( 748 sw->rate, 749 sw->buf + pos, 750 sw->hw->mix_buf->samples + wpos, 751 &isamp, 752 &osamp 753 ); 754 ret += isamp; 755 samples -= isamp; 756 pos += isamp; 757 live += osamp; 758 wpos = (wpos + osamp) % hwsamples; 759 total += osamp; 760 } 761 762 sw->total_hw_samples_mixed += total; 763 sw->empty = sw->total_hw_samples_mixed == 0; 764 765 #ifdef DEBUG_OUT 766 dolog ( 767 "%s: write size %zu ret %zu total sw %zu\n", 768 SW_NAME (sw), 769 size / sw->info.bytes_per_frame, 770 ret, 771 sw->total_hw_samples_mixed 772 ); 773 #endif 774 775 return ret * sw->info.bytes_per_frame; 776 } 777 778 #ifdef DEBUG_AUDIO 779 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 780 { 781 dolog("%s: bits %d, sign %d, float %d, freq %d, nchan %d\n", 782 cap, info->bits, info->is_signed, info->is_float, info->freq, 783 info->nchannels); 784 } 785 #endif 786 787 #define DAC 788 #include "audio_template.h" 789 #undef DAC 790 #include "audio_template.h" 791 792 /* 793 * Timer 794 */ 795 static int audio_is_timer_needed(AudioState *s) 796 { 797 HWVoiceIn *hwi = NULL; 798 HWVoiceOut *hwo = NULL; 799 800 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 801 if (!hwo->poll_mode) { 802 return 1; 803 } 804 } 805 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 806 if (!hwi->poll_mode) { 807 return 1; 808 } 809 } 810 return 0; 811 } 812 813 static void audio_reset_timer (AudioState *s) 814 { 815 if (audio_is_timer_needed(s)) { 816 timer_mod_anticipate_ns(s->ts, 817 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 818 if (!s->timer_running) { 819 s->timer_running = true; 820 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 821 trace_audio_timer_start(s->period_ticks / SCALE_MS); 822 } 823 } else { 824 timer_del(s->ts); 825 if (s->timer_running) { 826 s->timer_running = false; 827 trace_audio_timer_stop(); 828 } 829 } 830 } 831 832 static void audio_timer (void *opaque) 833 { 834 int64_t now, diff; 835 AudioState *s = opaque; 836 837 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 838 diff = now - s->timer_last; 839 if (diff > s->period_ticks * 3 / 2) { 840 trace_audio_timer_delayed(diff / SCALE_MS); 841 } 842 s->timer_last = now; 843 844 audio_run(s, "timer"); 845 audio_reset_timer(s); 846 } 847 848 /* 849 * Public API 850 */ 851 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size) 852 { 853 HWVoiceOut *hw; 854 855 if (!sw) { 856 /* XXX: Consider options */ 857 return size; 858 } 859 hw = sw->hw; 860 861 if (!hw->enabled) { 862 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 863 return 0; 864 } 865 866 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) { 867 return audio_pcm_sw_write(sw, buf, size); 868 } else { 869 return hw->pcm_ops->write(hw, buf, size); 870 } 871 } 872 873 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size) 874 { 875 HWVoiceIn *hw; 876 877 if (!sw) { 878 /* XXX: Consider options */ 879 return size; 880 } 881 hw = sw->hw; 882 883 if (!hw->enabled) { 884 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 885 return 0; 886 } 887 888 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) { 889 return audio_pcm_sw_read(sw, buf, size); 890 } else { 891 return hw->pcm_ops->read(hw, buf, size); 892 } 893 } 894 895 int AUD_get_buffer_size_out(SWVoiceOut *sw) 896 { 897 return sw->hw->samples * sw->hw->info.bytes_per_frame; 898 } 899 900 void AUD_set_active_out (SWVoiceOut *sw, int on) 901 { 902 HWVoiceOut *hw; 903 904 if (!sw) { 905 return; 906 } 907 908 hw = sw->hw; 909 if (sw->active != on) { 910 AudioState *s = sw->s; 911 SWVoiceOut *temp_sw; 912 SWVoiceCap *sc; 913 914 if (on) { 915 hw->pending_disable = 0; 916 if (!hw->enabled) { 917 hw->enabled = 1; 918 if (s->vm_running) { 919 if (hw->pcm_ops->enable_out) { 920 hw->pcm_ops->enable_out(hw, true); 921 } 922 audio_reset_timer (s); 923 } 924 } 925 } else { 926 if (hw->enabled) { 927 int nb_active = 0; 928 929 for (temp_sw = hw->sw_head.lh_first; temp_sw; 930 temp_sw = temp_sw->entries.le_next) { 931 nb_active += temp_sw->active != 0; 932 } 933 934 hw->pending_disable = nb_active == 1; 935 } 936 } 937 938 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 939 sc->sw.active = hw->enabled; 940 if (hw->enabled) { 941 audio_capture_maybe_changed (sc->cap, 1); 942 } 943 } 944 sw->active = on; 945 } 946 } 947 948 void AUD_set_active_in (SWVoiceIn *sw, int on) 949 { 950 HWVoiceIn *hw; 951 952 if (!sw) { 953 return; 954 } 955 956 hw = sw->hw; 957 if (sw->active != on) { 958 AudioState *s = sw->s; 959 SWVoiceIn *temp_sw; 960 961 if (on) { 962 if (!hw->enabled) { 963 hw->enabled = 1; 964 if (s->vm_running) { 965 if (hw->pcm_ops->enable_in) { 966 hw->pcm_ops->enable_in(hw, true); 967 } 968 audio_reset_timer (s); 969 } 970 } 971 sw->total_hw_samples_acquired = hw->total_samples_captured; 972 } else { 973 if (hw->enabled) { 974 int nb_active = 0; 975 976 for (temp_sw = hw->sw_head.lh_first; temp_sw; 977 temp_sw = temp_sw->entries.le_next) { 978 nb_active += temp_sw->active != 0; 979 } 980 981 if (nb_active == 1) { 982 hw->enabled = 0; 983 if (hw->pcm_ops->enable_in) { 984 hw->pcm_ops->enable_in(hw, false); 985 } 986 } 987 } 988 } 989 sw->active = on; 990 } 991 } 992 993 /** 994 * audio_frontend_frames_in() - returns the number of frames the resampling 995 * code generates from frames_in frames 996 * 997 * @sw: audio recording frontend 998 * @frames_in: number of frames 999 */ 1000 static size_t audio_frontend_frames_in(SWVoiceIn *sw, size_t frames_in) 1001 { 1002 return (int64_t)frames_in * sw->ratio >> 32; 1003 } 1004 1005 static size_t audio_get_avail (SWVoiceIn *sw) 1006 { 1007 size_t live; 1008 1009 if (!sw) { 1010 return 0; 1011 } 1012 1013 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 1014 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) { 1015 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live, 1016 sw->hw->conv_buf->size); 1017 return 0; 1018 } 1019 1020 ldebug ( 1021 "%s: get_avail live %zu frontend frames %zu\n", 1022 SW_NAME (sw), 1023 live, audio_frontend_frames_in(sw, live) 1024 ); 1025 1026 return live; 1027 } 1028 1029 /** 1030 * audio_frontend_frames_out() - returns the number of frames needed to 1031 * get frames_out frames after resampling 1032 * 1033 * @sw: audio playback frontend 1034 * @frames_out: number of frames 1035 */ 1036 static size_t audio_frontend_frames_out(SWVoiceOut *sw, size_t frames_out) 1037 { 1038 return ((int64_t)frames_out << 32) / sw->ratio; 1039 } 1040 1041 static size_t audio_get_free(SWVoiceOut *sw) 1042 { 1043 size_t live, dead; 1044 1045 if (!sw) { 1046 return 0; 1047 } 1048 1049 live = sw->total_hw_samples_mixed; 1050 1051 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) { 1052 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live, 1053 sw->hw->mix_buf->size); 1054 return 0; 1055 } 1056 1057 dead = sw->hw->mix_buf->size - live; 1058 1059 #ifdef DEBUG_OUT 1060 dolog("%s: get_free live %zu dead %zu frontend frames %zu\n", 1061 SW_NAME(sw), live, dead, audio_frontend_frames_out(sw, dead)); 1062 #endif 1063 1064 return dead; 1065 } 1066 1067 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos, 1068 size_t samples) 1069 { 1070 size_t n; 1071 1072 if (hw->enabled) { 1073 SWVoiceCap *sc; 1074 1075 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1076 SWVoiceOut *sw = &sc->sw; 1077 int rpos2 = rpos; 1078 1079 n = samples; 1080 while (n) { 1081 size_t till_end_of_hw = hw->mix_buf->size - rpos2; 1082 size_t to_write = MIN(till_end_of_hw, n); 1083 size_t bytes = to_write * hw->info.bytes_per_frame; 1084 size_t written; 1085 1086 sw->buf = hw->mix_buf->samples + rpos2; 1087 written = audio_pcm_sw_write (sw, NULL, bytes); 1088 if (written - bytes) { 1089 dolog("Could not mix %zu bytes into a capture " 1090 "buffer, mixed %zu\n", 1091 bytes, written); 1092 break; 1093 } 1094 n -= to_write; 1095 rpos2 = (rpos2 + to_write) % hw->mix_buf->size; 1096 } 1097 } 1098 } 1099 1100 n = MIN(samples, hw->mix_buf->size - rpos); 1101 mixeng_clear(hw->mix_buf->samples + rpos, n); 1102 mixeng_clear(hw->mix_buf->samples, samples - n); 1103 } 1104 1105 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live) 1106 { 1107 size_t clipped = 0; 1108 1109 while (live) { 1110 size_t size = live * hw->info.bytes_per_frame; 1111 size_t decr, proc; 1112 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1113 1114 if (size == 0) { 1115 break; 1116 } 1117 1118 decr = MIN(size / hw->info.bytes_per_frame, live); 1119 if (buf) { 1120 audio_pcm_hw_clip_out(hw, buf, decr); 1121 } 1122 proc = hw->pcm_ops->put_buffer_out(hw, buf, 1123 decr * hw->info.bytes_per_frame) / 1124 hw->info.bytes_per_frame; 1125 1126 live -= proc; 1127 clipped += proc; 1128 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size; 1129 1130 if (proc == 0 || proc < decr) { 1131 break; 1132 } 1133 } 1134 1135 if (hw->pcm_ops->run_buffer_out) { 1136 hw->pcm_ops->run_buffer_out(hw); 1137 } 1138 1139 return clipped; 1140 } 1141 1142 static void audio_run_out (AudioState *s) 1143 { 1144 HWVoiceOut *hw = NULL; 1145 SWVoiceOut *sw; 1146 1147 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1148 size_t played, live, prev_rpos; 1149 size_t hw_free = audio_pcm_hw_get_free(hw); 1150 int nb_live; 1151 1152 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1153 /* there is exactly 1 sw for each hw with no mixeng */ 1154 sw = hw->sw_head.lh_first; 1155 1156 if (hw->pending_disable) { 1157 hw->enabled = 0; 1158 hw->pending_disable = 0; 1159 if (hw->pcm_ops->enable_out) { 1160 hw->pcm_ops->enable_out(hw, false); 1161 } 1162 } 1163 1164 if (sw->active) { 1165 sw->callback.fn(sw->callback.opaque, 1166 hw_free * sw->info.bytes_per_frame); 1167 } 1168 1169 if (hw->pcm_ops->run_buffer_out) { 1170 hw->pcm_ops->run_buffer_out(hw); 1171 } 1172 1173 continue; 1174 } 1175 1176 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1177 if (sw->active) { 1178 size_t sw_free = audio_get_free(sw); 1179 size_t free; 1180 1181 if (hw_free > sw->total_hw_samples_mixed) { 1182 free = audio_frontend_frames_out(sw, 1183 MIN(sw_free, hw_free - sw->total_hw_samples_mixed)); 1184 } else { 1185 free = 0; 1186 } 1187 if (free > 0) { 1188 sw->callback.fn(sw->callback.opaque, 1189 free * sw->info.bytes_per_frame); 1190 } 1191 } 1192 } 1193 1194 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1195 if (!nb_live) { 1196 live = 0; 1197 } 1198 1199 if (audio_bug(__func__, live > hw->mix_buf->size)) { 1200 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size); 1201 continue; 1202 } 1203 1204 if (hw->pending_disable && !nb_live) { 1205 SWVoiceCap *sc; 1206 #ifdef DEBUG_OUT 1207 dolog ("Disabling voice\n"); 1208 #endif 1209 hw->enabled = 0; 1210 hw->pending_disable = 0; 1211 if (hw->pcm_ops->enable_out) { 1212 hw->pcm_ops->enable_out(hw, false); 1213 } 1214 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1215 sc->sw.active = 0; 1216 audio_recalc_and_notify_capture (sc->cap); 1217 } 1218 continue; 1219 } 1220 1221 if (!live) { 1222 if (hw->pcm_ops->run_buffer_out) { 1223 hw->pcm_ops->run_buffer_out(hw); 1224 } 1225 continue; 1226 } 1227 1228 prev_rpos = hw->mix_buf->pos; 1229 played = audio_pcm_hw_run_out(hw, live); 1230 replay_audio_out(&played); 1231 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) { 1232 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n", 1233 hw->mix_buf->pos, hw->mix_buf->size, played); 1234 hw->mix_buf->pos = 0; 1235 } 1236 1237 #ifdef DEBUG_OUT 1238 dolog("played=%zu\n", played); 1239 #endif 1240 1241 if (played) { 1242 hw->ts_helper += played; 1243 audio_capture_mix_and_clear (hw, prev_rpos, played); 1244 } 1245 1246 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1247 if (!sw->active && sw->empty) { 1248 continue; 1249 } 1250 1251 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1252 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1253 played, sw->total_hw_samples_mixed); 1254 played = sw->total_hw_samples_mixed; 1255 } 1256 1257 sw->total_hw_samples_mixed -= played; 1258 1259 if (!sw->total_hw_samples_mixed) { 1260 sw->empty = 1; 1261 } 1262 } 1263 } 1264 } 1265 1266 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1267 { 1268 size_t conv = 0; 1269 1270 if (hw->pcm_ops->run_buffer_in) { 1271 hw->pcm_ops->run_buffer_in(hw); 1272 } 1273 1274 while (samples) { 1275 size_t proc; 1276 size_t size = samples * hw->info.bytes_per_frame; 1277 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1278 1279 assert(size % hw->info.bytes_per_frame == 0); 1280 if (size == 0) { 1281 break; 1282 } 1283 1284 proc = audio_pcm_hw_conv_in(hw, buf, size / hw->info.bytes_per_frame); 1285 1286 samples -= proc; 1287 conv += proc; 1288 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame); 1289 } 1290 1291 return conv; 1292 } 1293 1294 static void audio_run_in (AudioState *s) 1295 { 1296 HWVoiceIn *hw = NULL; 1297 1298 if (!audio_get_pdo_in(s->dev)->mixing_engine) { 1299 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1300 /* there is exactly 1 sw for each hw with no mixeng */ 1301 SWVoiceIn *sw = hw->sw_head.lh_first; 1302 if (sw->active) { 1303 sw->callback.fn(sw->callback.opaque, INT_MAX); 1304 } 1305 } 1306 return; 1307 } 1308 1309 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1310 SWVoiceIn *sw; 1311 size_t captured = 0, min; 1312 1313 if (replay_mode != REPLAY_MODE_PLAY) { 1314 captured = audio_pcm_hw_run_in( 1315 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw)); 1316 } 1317 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos, 1318 hw->conv_buf->size); 1319 1320 min = audio_pcm_hw_find_min_in (hw); 1321 hw->total_samples_captured += captured - min; 1322 hw->ts_helper += captured; 1323 1324 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1325 sw->total_hw_samples_acquired -= min; 1326 1327 if (sw->active) { 1328 size_t sw_avail = audio_get_avail(sw); 1329 size_t avail; 1330 1331 avail = audio_frontend_frames_in(sw, sw_avail); 1332 if (avail > 0) { 1333 sw->callback.fn(sw->callback.opaque, 1334 avail * sw->info.bytes_per_frame); 1335 } 1336 } 1337 } 1338 } 1339 } 1340 1341 static void audio_run_capture (AudioState *s) 1342 { 1343 CaptureVoiceOut *cap; 1344 1345 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1346 size_t live, rpos, captured; 1347 HWVoiceOut *hw = &cap->hw; 1348 SWVoiceOut *sw; 1349 1350 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1351 rpos = hw->mix_buf->pos; 1352 while (live) { 1353 size_t left = hw->mix_buf->size - rpos; 1354 size_t to_capture = MIN(live, left); 1355 struct st_sample *src; 1356 struct capture_callback *cb; 1357 1358 src = hw->mix_buf->samples + rpos; 1359 hw->clip (cap->buf, src, to_capture); 1360 mixeng_clear (src, to_capture); 1361 1362 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1363 cb->ops.capture (cb->opaque, cap->buf, 1364 to_capture * hw->info.bytes_per_frame); 1365 } 1366 rpos = (rpos + to_capture) % hw->mix_buf->size; 1367 live -= to_capture; 1368 } 1369 hw->mix_buf->pos = rpos; 1370 1371 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1372 if (!sw->active && sw->empty) { 1373 continue; 1374 } 1375 1376 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1377 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1378 captured, sw->total_hw_samples_mixed); 1379 captured = sw->total_hw_samples_mixed; 1380 } 1381 1382 sw->total_hw_samples_mixed -= captured; 1383 sw->empty = sw->total_hw_samples_mixed == 0; 1384 } 1385 } 1386 } 1387 1388 void audio_run(AudioState *s, const char *msg) 1389 { 1390 audio_run_out(s); 1391 audio_run_in(s); 1392 audio_run_capture(s); 1393 1394 #ifdef DEBUG_POLL 1395 { 1396 static double prevtime; 1397 double currtime; 1398 struct timeval tv; 1399 1400 if (gettimeofday (&tv, NULL)) { 1401 perror ("audio_run: gettimeofday"); 1402 return; 1403 } 1404 1405 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1406 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1407 prevtime = currtime; 1408 } 1409 #endif 1410 } 1411 1412 void audio_generic_run_buffer_in(HWVoiceIn *hw) 1413 { 1414 if (unlikely(!hw->buf_emul)) { 1415 hw->size_emul = hw->samples * hw->info.bytes_per_frame; 1416 hw->buf_emul = g_malloc(hw->size_emul); 1417 hw->pos_emul = hw->pending_emul = 0; 1418 } 1419 1420 while (hw->pending_emul < hw->size_emul) { 1421 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1422 hw->size_emul - hw->pending_emul); 1423 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1424 read_len); 1425 hw->pending_emul += read; 1426 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul; 1427 if (read < read_len) { 1428 break; 1429 } 1430 } 1431 } 1432 1433 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1434 { 1435 size_t start; 1436 1437 start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul); 1438 assert(start < hw->size_emul); 1439 1440 *size = MIN(*size, hw->pending_emul); 1441 *size = MIN(*size, hw->size_emul - start); 1442 return hw->buf_emul + start; 1443 } 1444 1445 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1446 { 1447 assert(size <= hw->pending_emul); 1448 hw->pending_emul -= size; 1449 } 1450 1451 size_t audio_generic_buffer_get_free(HWVoiceOut *hw) 1452 { 1453 if (hw->buf_emul) { 1454 return hw->size_emul - hw->pending_emul; 1455 } else { 1456 return hw->samples * hw->info.bytes_per_frame; 1457 } 1458 } 1459 1460 void audio_generic_run_buffer_out(HWVoiceOut *hw) 1461 { 1462 while (hw->pending_emul) { 1463 size_t write_len, written, start; 1464 1465 start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul); 1466 assert(start < hw->size_emul); 1467 1468 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1469 1470 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1471 hw->pending_emul -= written; 1472 1473 if (written < write_len) { 1474 break; 1475 } 1476 } 1477 } 1478 1479 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1480 { 1481 if (unlikely(!hw->buf_emul)) { 1482 hw->size_emul = hw->samples * hw->info.bytes_per_frame; 1483 hw->buf_emul = g_malloc(hw->size_emul); 1484 hw->pos_emul = hw->pending_emul = 0; 1485 } 1486 1487 *size = MIN(hw->size_emul - hw->pending_emul, 1488 hw->size_emul - hw->pos_emul); 1489 return hw->buf_emul + hw->pos_emul; 1490 } 1491 1492 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1493 { 1494 assert(buf == hw->buf_emul + hw->pos_emul && 1495 size + hw->pending_emul <= hw->size_emul); 1496 1497 hw->pending_emul += size; 1498 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1499 1500 return size; 1501 } 1502 1503 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1504 { 1505 size_t total = 0; 1506 1507 if (hw->pcm_ops->buffer_get_free) { 1508 size_t free = hw->pcm_ops->buffer_get_free(hw); 1509 1510 size = MIN(size, free); 1511 } 1512 1513 while (total < size) { 1514 size_t dst_size = size - total; 1515 size_t copy_size, proc; 1516 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1517 1518 if (dst_size == 0) { 1519 break; 1520 } 1521 1522 copy_size = MIN(size - total, dst_size); 1523 if (dst) { 1524 memcpy(dst, (char *)buf + total, copy_size); 1525 } 1526 proc = hw->pcm_ops->put_buffer_out(hw, dst, copy_size); 1527 total += proc; 1528 1529 if (proc == 0 || proc < copy_size) { 1530 break; 1531 } 1532 } 1533 1534 return total; 1535 } 1536 1537 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1538 { 1539 size_t total = 0; 1540 1541 if (hw->pcm_ops->run_buffer_in) { 1542 hw->pcm_ops->run_buffer_in(hw); 1543 } 1544 1545 while (total < size) { 1546 size_t src_size = size - total; 1547 void *src = hw->pcm_ops->get_buffer_in(hw, &src_size); 1548 1549 if (src_size == 0) { 1550 break; 1551 } 1552 1553 memcpy((char *)buf + total, src, src_size); 1554 hw->pcm_ops->put_buffer_in(hw, src, src_size); 1555 total += src_size; 1556 } 1557 1558 return total; 1559 } 1560 1561 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1562 bool msg, Audiodev *dev) 1563 { 1564 s->drv_opaque = drv->init(dev); 1565 1566 if (s->drv_opaque) { 1567 if (!drv->pcm_ops->get_buffer_in) { 1568 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1569 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1570 } 1571 if (!drv->pcm_ops->get_buffer_out) { 1572 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1573 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1574 } 1575 1576 audio_init_nb_voices_out(s, drv); 1577 audio_init_nb_voices_in(s, drv); 1578 s->drv = drv; 1579 return 0; 1580 } else { 1581 if (msg) { 1582 dolog("Could not init `%s' audio driver\n", drv->name); 1583 } 1584 return -1; 1585 } 1586 } 1587 1588 static void audio_vm_change_state_handler (void *opaque, bool running, 1589 RunState state) 1590 { 1591 AudioState *s = opaque; 1592 HWVoiceOut *hwo = NULL; 1593 HWVoiceIn *hwi = NULL; 1594 1595 s->vm_running = running; 1596 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1597 if (hwo->pcm_ops->enable_out) { 1598 hwo->pcm_ops->enable_out(hwo, running); 1599 } 1600 } 1601 1602 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1603 if (hwi->pcm_ops->enable_in) { 1604 hwi->pcm_ops->enable_in(hwi, running); 1605 } 1606 } 1607 audio_reset_timer (s); 1608 } 1609 1610 static void free_audio_state(AudioState *s) 1611 { 1612 HWVoiceOut *hwo, *hwon; 1613 HWVoiceIn *hwi, *hwin; 1614 1615 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1616 SWVoiceCap *sc; 1617 1618 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1619 hwo->pcm_ops->enable_out(hwo, false); 1620 } 1621 hwo->pcm_ops->fini_out (hwo); 1622 1623 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1624 CaptureVoiceOut *cap = sc->cap; 1625 struct capture_callback *cb; 1626 1627 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1628 cb->ops.destroy (cb->opaque); 1629 } 1630 } 1631 QLIST_REMOVE(hwo, entries); 1632 } 1633 1634 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1635 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1636 hwi->pcm_ops->enable_in(hwi, false); 1637 } 1638 hwi->pcm_ops->fini_in (hwi); 1639 QLIST_REMOVE(hwi, entries); 1640 } 1641 1642 if (s->drv) { 1643 s->drv->fini (s->drv_opaque); 1644 s->drv = NULL; 1645 } 1646 1647 if (s->dev) { 1648 qapi_free_Audiodev(s->dev); 1649 s->dev = NULL; 1650 } 1651 1652 if (s->ts) { 1653 timer_free(s->ts); 1654 s->ts = NULL; 1655 } 1656 1657 g_free(s); 1658 } 1659 1660 void audio_cleanup(void) 1661 { 1662 while (!QTAILQ_EMPTY(&audio_states)) { 1663 AudioState *s = QTAILQ_FIRST(&audio_states); 1664 QTAILQ_REMOVE(&audio_states, s, list); 1665 free_audio_state(s); 1666 } 1667 } 1668 1669 static bool vmstate_audio_needed(void *opaque) 1670 { 1671 /* 1672 * Never needed, this vmstate only exists in case 1673 * an old qemu sends it to us. 1674 */ 1675 return false; 1676 } 1677 1678 static const VMStateDescription vmstate_audio = { 1679 .name = "audio", 1680 .version_id = 1, 1681 .minimum_version_id = 1, 1682 .needed = vmstate_audio_needed, 1683 .fields = (VMStateField[]) { 1684 VMSTATE_END_OF_LIST() 1685 } 1686 }; 1687 1688 static void audio_validate_opts(Audiodev *dev, Error **errp); 1689 1690 static AudiodevListEntry *audiodev_find( 1691 AudiodevListHead *head, const char *drvname) 1692 { 1693 AudiodevListEntry *e; 1694 QSIMPLEQ_FOREACH(e, head, next) { 1695 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1696 return e; 1697 } 1698 } 1699 1700 return NULL; 1701 } 1702 1703 /* 1704 * if we have dev, this function was called because of an -audiodev argument => 1705 * initialize a new state with it 1706 * if dev == NULL => legacy implicit initialization, return the already created 1707 * state or create a new one 1708 */ 1709 static AudioState *audio_init(Audiodev *dev, const char *name) 1710 { 1711 static bool atexit_registered; 1712 size_t i; 1713 int done = 0; 1714 const char *drvname = NULL; 1715 VMChangeStateEntry *e; 1716 AudioState *s; 1717 struct audio_driver *driver; 1718 /* silence gcc warning about uninitialized variable */ 1719 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1720 1721 if (using_spice) { 1722 /* 1723 * When using spice allow the spice audio driver being picked 1724 * as default. 1725 * 1726 * Temporary hack. Using audio devices without explicit 1727 * audiodev= property is already deprecated. Same goes for 1728 * the -soundhw switch. Once this support gets finally 1729 * removed we can also drop the concept of a default audio 1730 * backend and this can go away. 1731 */ 1732 driver = audio_driver_lookup("spice"); 1733 if (driver) { 1734 driver->can_be_default = 1; 1735 } 1736 } 1737 1738 if (dev) { 1739 /* -audiodev option */ 1740 legacy_config = false; 1741 drvname = AudiodevDriver_str(dev->driver); 1742 } else if (!QTAILQ_EMPTY(&audio_states)) { 1743 if (!legacy_config) { 1744 dolog("Device %s: audiodev default parameter is deprecated, please " 1745 "specify audiodev=%s\n", name, 1746 QTAILQ_FIRST(&audio_states)->dev->id); 1747 } 1748 return QTAILQ_FIRST(&audio_states); 1749 } else { 1750 /* legacy implicit initialization */ 1751 head = audio_handle_legacy_opts(); 1752 /* 1753 * In case of legacy initialization, all Audiodevs in the list will have 1754 * the same configuration (except the driver), so it doesn't matter which 1755 * one we chose. We need an Audiodev to set up AudioState before we can 1756 * init a driver. Also note that dev at this point is still in the 1757 * list. 1758 */ 1759 dev = QSIMPLEQ_FIRST(&head)->dev; 1760 audio_validate_opts(dev, &error_abort); 1761 } 1762 1763 s = g_new0(AudioState, 1); 1764 s->dev = dev; 1765 1766 QLIST_INIT (&s->hw_head_out); 1767 QLIST_INIT (&s->hw_head_in); 1768 QLIST_INIT (&s->cap_head); 1769 if (!atexit_registered) { 1770 atexit(audio_cleanup); 1771 atexit_registered = true; 1772 } 1773 1774 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1775 1776 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1777 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1778 1779 if (s->nb_hw_voices_out < 1) { 1780 dolog ("Bogus number of playback voices %d, setting to 1\n", 1781 s->nb_hw_voices_out); 1782 s->nb_hw_voices_out = 1; 1783 } 1784 1785 if (s->nb_hw_voices_in < 0) { 1786 dolog ("Bogus number of capture voices %d, setting to 0\n", 1787 s->nb_hw_voices_in); 1788 s->nb_hw_voices_in = 0; 1789 } 1790 1791 if (drvname) { 1792 driver = audio_driver_lookup(drvname); 1793 if (driver) { 1794 done = !audio_driver_init(s, driver, true, dev); 1795 } else { 1796 dolog ("Unknown audio driver `%s'\n", drvname); 1797 } 1798 if (!done) { 1799 free_audio_state(s); 1800 return NULL; 1801 } 1802 } else { 1803 for (i = 0; audio_prio_list[i]; i++) { 1804 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1805 driver = audio_driver_lookup(audio_prio_list[i]); 1806 1807 if (e && driver) { 1808 s->dev = dev = e->dev; 1809 audio_validate_opts(dev, &error_abort); 1810 done = !audio_driver_init(s, driver, false, dev); 1811 if (done) { 1812 e->dev = NULL; 1813 break; 1814 } 1815 } 1816 } 1817 } 1818 audio_free_audiodev_list(&head); 1819 1820 if (!done) { 1821 driver = audio_driver_lookup("none"); 1822 done = !audio_driver_init(s, driver, false, dev); 1823 assert(done); 1824 dolog("warning: Using timer based audio emulation\n"); 1825 } 1826 1827 if (dev->timer_period <= 0) { 1828 s->period_ticks = 1; 1829 } else { 1830 s->period_ticks = dev->timer_period * (int64_t)SCALE_US; 1831 } 1832 1833 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1834 if (!e) { 1835 dolog ("warning: Could not register change state handler\n" 1836 "(Audio can continue looping even after stopping the VM)\n"); 1837 } 1838 1839 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1840 QLIST_INIT (&s->card_head); 1841 vmstate_register (NULL, 0, &vmstate_audio, s); 1842 return s; 1843 } 1844 1845 void audio_free_audiodev_list(AudiodevListHead *head) 1846 { 1847 AudiodevListEntry *e; 1848 while ((e = QSIMPLEQ_FIRST(head))) { 1849 QSIMPLEQ_REMOVE_HEAD(head, next); 1850 qapi_free_Audiodev(e->dev); 1851 g_free(e); 1852 } 1853 } 1854 1855 void AUD_register_card (const char *name, QEMUSoundCard *card) 1856 { 1857 if (!card->state) { 1858 card->state = audio_init(NULL, name); 1859 } 1860 1861 card->name = g_strdup (name); 1862 memset (&card->entries, 0, sizeof (card->entries)); 1863 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1864 } 1865 1866 void AUD_remove_card (QEMUSoundCard *card) 1867 { 1868 QLIST_REMOVE (card, entries); 1869 g_free (card->name); 1870 } 1871 1872 static struct audio_pcm_ops capture_pcm_ops; 1873 1874 CaptureVoiceOut *AUD_add_capture( 1875 AudioState *s, 1876 struct audsettings *as, 1877 struct audio_capture_ops *ops, 1878 void *cb_opaque 1879 ) 1880 { 1881 CaptureVoiceOut *cap; 1882 struct capture_callback *cb; 1883 1884 if (!s) { 1885 if (!legacy_config) { 1886 dolog("Capturing without setting an audiodev is deprecated\n"); 1887 } 1888 s = audio_init(NULL, NULL); 1889 } 1890 1891 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1892 dolog("Can't capture with mixeng disabled\n"); 1893 return NULL; 1894 } 1895 1896 if (audio_validate_settings (as)) { 1897 dolog ("Invalid settings were passed when trying to add capture\n"); 1898 audio_print_settings (as); 1899 return NULL; 1900 } 1901 1902 cb = g_malloc0(sizeof(*cb)); 1903 cb->ops = *ops; 1904 cb->opaque = cb_opaque; 1905 1906 cap = audio_pcm_capture_find_specific(s, as); 1907 if (cap) { 1908 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1909 return cap; 1910 } else { 1911 HWVoiceOut *hw; 1912 CaptureVoiceOut *cap; 1913 1914 cap = g_malloc0(sizeof(*cap)); 1915 1916 hw = &cap->hw; 1917 hw->s = s; 1918 hw->pcm_ops = &capture_pcm_ops; 1919 QLIST_INIT (&hw->sw_head); 1920 QLIST_INIT (&cap->cb_head); 1921 1922 /* XXX find a more elegant way */ 1923 hw->samples = 4096 * 4; 1924 audio_pcm_hw_alloc_resources_out(hw); 1925 1926 audio_pcm_init_info (&hw->info, as); 1927 1928 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame); 1929 1930 if (hw->info.is_float) { 1931 hw->clip = mixeng_clip_float[hw->info.nchannels == 2]; 1932 } else { 1933 hw->clip = mixeng_clip 1934 [hw->info.nchannels == 2] 1935 [hw->info.is_signed] 1936 [hw->info.swap_endianness] 1937 [audio_bits_to_index(hw->info.bits)]; 1938 } 1939 1940 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1941 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1942 1943 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1944 audio_attach_capture (hw); 1945 } 1946 return cap; 1947 } 1948 } 1949 1950 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1951 { 1952 struct capture_callback *cb; 1953 1954 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1955 if (cb->opaque == cb_opaque) { 1956 cb->ops.destroy (cb_opaque); 1957 QLIST_REMOVE (cb, entries); 1958 g_free (cb); 1959 1960 if (!cap->cb_head.lh_first) { 1961 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1962 1963 while (sw) { 1964 SWVoiceCap *sc = (SWVoiceCap *) sw; 1965 #ifdef DEBUG_CAPTURE 1966 dolog ("freeing %s\n", sw->name); 1967 #endif 1968 1969 sw1 = sw->entries.le_next; 1970 if (sw->rate) { 1971 st_rate_stop (sw->rate); 1972 sw->rate = NULL; 1973 } 1974 QLIST_REMOVE (sw, entries); 1975 QLIST_REMOVE (sc, entries); 1976 g_free (sc); 1977 sw = sw1; 1978 } 1979 QLIST_REMOVE (cap, entries); 1980 g_free (cap->hw.mix_buf); 1981 g_free (cap->buf); 1982 g_free (cap); 1983 } 1984 return; 1985 } 1986 } 1987 } 1988 1989 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1990 { 1991 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1992 audio_set_volume_out(sw, &vol); 1993 } 1994 1995 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol) 1996 { 1997 if (sw) { 1998 HWVoiceOut *hw = sw->hw; 1999 2000 sw->vol.mute = vol->mute; 2001 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 2002 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] / 2003 255; 2004 2005 if (hw->pcm_ops->volume_out) { 2006 hw->pcm_ops->volume_out(hw, vol); 2007 } 2008 } 2009 } 2010 2011 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 2012 { 2013 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 2014 audio_set_volume_in(sw, &vol); 2015 } 2016 2017 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol) 2018 { 2019 if (sw) { 2020 HWVoiceIn *hw = sw->hw; 2021 2022 sw->vol.mute = vol->mute; 2023 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 2024 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] / 2025 255; 2026 2027 if (hw->pcm_ops->volume_in) { 2028 hw->pcm_ops->volume_in(hw, vol); 2029 } 2030 } 2031 } 2032 2033 void audio_create_pdos(Audiodev *dev) 2034 { 2035 switch (dev->driver) { 2036 #define CASE(DRIVER, driver, pdo_name) \ 2037 case AUDIODEV_DRIVER_##DRIVER: \ 2038 if (!dev->u.driver.in) { \ 2039 dev->u.driver.in = g_malloc0( \ 2040 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 2041 } \ 2042 if (!dev->u.driver.out) { \ 2043 dev->u.driver.out = g_malloc0( \ 2044 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 2045 } \ 2046 break 2047 2048 CASE(NONE, none, ); 2049 CASE(ALSA, alsa, Alsa); 2050 CASE(COREAUDIO, coreaudio, Coreaudio); 2051 CASE(DBUS, dbus, ); 2052 CASE(DSOUND, dsound, ); 2053 CASE(JACK, jack, Jack); 2054 CASE(OSS, oss, Oss); 2055 CASE(PA, pa, Pa); 2056 CASE(SDL, sdl, Sdl); 2057 CASE(SNDIO, sndio, ); 2058 CASE(SPICE, spice, ); 2059 CASE(WAV, wav, ); 2060 2061 case AUDIODEV_DRIVER__MAX: 2062 abort(); 2063 }; 2064 } 2065 2066 static void audio_validate_per_direction_opts( 2067 AudiodevPerDirectionOptions *pdo, Error **errp) 2068 { 2069 if (!pdo->has_mixing_engine) { 2070 pdo->has_mixing_engine = true; 2071 pdo->mixing_engine = true; 2072 } 2073 if (!pdo->has_fixed_settings) { 2074 pdo->has_fixed_settings = true; 2075 pdo->fixed_settings = pdo->mixing_engine; 2076 } 2077 if (!pdo->fixed_settings && 2078 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 2079 error_setg(errp, 2080 "You can't use frequency, channels or format with fixed-settings=off"); 2081 return; 2082 } 2083 if (!pdo->mixing_engine && pdo->fixed_settings) { 2084 error_setg(errp, "You can't use fixed-settings without mixeng"); 2085 return; 2086 } 2087 2088 if (!pdo->has_frequency) { 2089 pdo->has_frequency = true; 2090 pdo->frequency = 44100; 2091 } 2092 if (!pdo->has_channels) { 2093 pdo->has_channels = true; 2094 pdo->channels = 2; 2095 } 2096 if (!pdo->has_voices) { 2097 pdo->has_voices = true; 2098 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX; 2099 } 2100 if (!pdo->has_format) { 2101 pdo->has_format = true; 2102 pdo->format = AUDIO_FORMAT_S16; 2103 } 2104 } 2105 2106 static void audio_validate_opts(Audiodev *dev, Error **errp) 2107 { 2108 Error *err = NULL; 2109 2110 audio_create_pdos(dev); 2111 2112 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 2113 if (err) { 2114 error_propagate(errp, err); 2115 return; 2116 } 2117 2118 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 2119 if (err) { 2120 error_propagate(errp, err); 2121 return; 2122 } 2123 2124 if (!dev->has_timer_period) { 2125 dev->has_timer_period = true; 2126 dev->timer_period = 10000; /* 100Hz -> 10ms */ 2127 } 2128 } 2129 2130 void audio_help(void) 2131 { 2132 int i; 2133 2134 printf("Available audio drivers:\n"); 2135 2136 for (i = 0; i < AUDIODEV_DRIVER__MAX; i++) { 2137 audio_driver *driver = audio_driver_lookup(AudiodevDriver_str(i)); 2138 if (driver) { 2139 printf("%s\n", driver->name); 2140 } 2141 } 2142 } 2143 2144 void audio_parse_option(const char *opt) 2145 { 2146 Audiodev *dev = NULL; 2147 2148 if (is_help_option(opt)) { 2149 audio_help(); 2150 exit(EXIT_SUCCESS); 2151 } 2152 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 2153 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 2154 visit_free(v); 2155 2156 audio_define(dev); 2157 } 2158 2159 void audio_define(Audiodev *dev) 2160 { 2161 AudiodevListEntry *e; 2162 2163 audio_validate_opts(dev, &error_fatal); 2164 2165 e = g_new0(AudiodevListEntry, 1); 2166 e->dev = dev; 2167 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 2168 } 2169 2170 bool audio_init_audiodevs(void) 2171 { 2172 AudiodevListEntry *e; 2173 2174 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2175 if (!audio_init(e->dev, NULL)) { 2176 return false; 2177 } 2178 } 2179 2180 return true; 2181 } 2182 2183 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 2184 { 2185 return (audsettings) { 2186 .freq = pdo->frequency, 2187 .nchannels = pdo->channels, 2188 .fmt = pdo->format, 2189 .endianness = AUDIO_HOST_ENDIANNESS, 2190 }; 2191 } 2192 2193 int audioformat_bytes_per_sample(AudioFormat fmt) 2194 { 2195 switch (fmt) { 2196 case AUDIO_FORMAT_U8: 2197 case AUDIO_FORMAT_S8: 2198 return 1; 2199 2200 case AUDIO_FORMAT_U16: 2201 case AUDIO_FORMAT_S16: 2202 return 2; 2203 2204 case AUDIO_FORMAT_U32: 2205 case AUDIO_FORMAT_S32: 2206 case AUDIO_FORMAT_F32: 2207 return 4; 2208 2209 case AUDIO_FORMAT__MAX: 2210 ; 2211 } 2212 abort(); 2213 } 2214 2215 2216 /* frames = freq * usec / 1e6 */ 2217 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2218 audsettings *as, int def_usecs) 2219 { 2220 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2221 return (as->freq * usecs + 500000) / 1000000; 2222 } 2223 2224 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2225 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2226 audsettings *as, int def_usecs) 2227 { 2228 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2229 } 2230 2231 /* 2232 * bytes = bytes_per_sample * samples = 2233 * bytes_per_sample * channels * freq * usec / 1e6 2234 */ 2235 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2236 audsettings *as, int def_usecs) 2237 { 2238 return audio_buffer_samples(pdo, as, def_usecs) * 2239 audioformat_bytes_per_sample(as->fmt); 2240 } 2241 2242 AudioState *audio_state_by_name(const char *name) 2243 { 2244 AudioState *s; 2245 QTAILQ_FOREACH(s, &audio_states, list) { 2246 assert(s->dev); 2247 if (strcmp(name, s->dev->id) == 0) { 2248 return s; 2249 } 2250 } 2251 return NULL; 2252 } 2253 2254 const char *audio_get_id(QEMUSoundCard *card) 2255 { 2256 if (card->state) { 2257 assert(card->state->dev); 2258 return card->state->dev->id; 2259 } else { 2260 return ""; 2261 } 2262 } 2263 2264 const char *audio_application_name(void) 2265 { 2266 const char *vm_name; 2267 2268 vm_name = qemu_get_vm_name(); 2269 return vm_name ? vm_name : "qemu"; 2270 } 2271 2272 void audio_rate_start(RateCtl *rate) 2273 { 2274 memset(rate, 0, sizeof(RateCtl)); 2275 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2276 } 2277 2278 size_t audio_rate_peek_bytes(RateCtl *rate, struct audio_pcm_info *info) 2279 { 2280 int64_t now; 2281 int64_t ticks; 2282 int64_t bytes; 2283 int64_t frames; 2284 2285 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2286 ticks = now - rate->start_ticks; 2287 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2288 frames = (bytes - rate->bytes_sent) / info->bytes_per_frame; 2289 if (frames < 0 || frames > 65536) { 2290 AUD_log(NULL, "Resetting rate control (%" PRId64 " frames)\n", frames); 2291 audio_rate_start(rate); 2292 frames = 0; 2293 } 2294 2295 return frames * info->bytes_per_frame; 2296 } 2297 2298 void audio_rate_add_bytes(RateCtl *rate, size_t bytes_used) 2299 { 2300 rate->bytes_sent += bytes_used; 2301 } 2302 2303 size_t audio_rate_get_bytes(RateCtl *rate, struct audio_pcm_info *info, 2304 size_t bytes_avail) 2305 { 2306 size_t bytes; 2307 2308 bytes = audio_rate_peek_bytes(rate, info); 2309 bytes = MIN(bytes, bytes_avail); 2310 audio_rate_add_bytes(rate, bytes); 2311 2312 return bytes; 2313 } 2314