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/clone-visitor.h" 32 #include "qapi/qobject-input-visitor.h" 33 #include "qapi/qapi-visit-audio.h" 34 #include "qapi/qapi-commands-audio.h" 35 #include "qemu/cutils.h" 36 #include "qemu/log.h" 37 #include "qemu/module.h" 38 #include "qemu/help_option.h" 39 #include "sysemu/sysemu.h" 40 #include "sysemu/replay.h" 41 #include "sysemu/runstate.h" 42 #include "ui/qemu-spice.h" 43 #include "trace.h" 44 45 #define AUDIO_CAP "audio" 46 #include "audio_int.h" 47 48 /* #define DEBUG_LIVE */ 49 /* #define DEBUG_OUT */ 50 /* #define DEBUG_CAPTURE */ 51 /* #define DEBUG_POLL */ 52 53 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" 54 55 56 /* Order of CONFIG_AUDIO_DRIVERS is import. 57 The 1st one is the one used by default, that is the reason 58 that we generate the list. 59 */ 60 const char *audio_prio_list[] = { 61 "spice", 62 CONFIG_AUDIO_DRIVERS 63 "none", 64 "wav", 65 NULL 66 }; 67 68 static QLIST_HEAD(, audio_driver) audio_drivers; 69 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs); 70 71 void audio_driver_register(audio_driver *drv) 72 { 73 QLIST_INSERT_HEAD(&audio_drivers, drv, next); 74 } 75 76 audio_driver *audio_driver_lookup(const char *name) 77 { 78 struct audio_driver *d; 79 Error *local_err = NULL; 80 int rv; 81 82 QLIST_FOREACH(d, &audio_drivers, next) { 83 if (strcmp(name, d->name) == 0) { 84 return d; 85 } 86 } 87 rv = audio_module_load(name, &local_err); 88 if (rv > 0) { 89 QLIST_FOREACH(d, &audio_drivers, next) { 90 if (strcmp(name, d->name) == 0) { 91 return d; 92 } 93 } 94 } else if (rv < 0) { 95 error_report_err(local_err); 96 } 97 return NULL; 98 } 99 100 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states = 101 QTAILQ_HEAD_INITIALIZER(audio_states); 102 103 const struct mixeng_volume nominal_volume = { 104 .mute = 0, 105 #ifdef FLOAT_MIXENG 106 .r = 1.0, 107 .l = 1.0, 108 #else 109 .r = 1ULL << 32, 110 .l = 1ULL << 32, 111 #endif 112 }; 113 114 static bool legacy_config = true; 115 116 int audio_bug (const char *funcname, int cond) 117 { 118 if (cond) { 119 static int shown; 120 121 AUD_log (NULL, "A bug was just triggered in %s\n", funcname); 122 if (!shown) { 123 shown = 1; 124 AUD_log (NULL, "Save all your work and restart without audio\n"); 125 AUD_log (NULL, "I am sorry\n"); 126 } 127 AUD_log (NULL, "Context:\n"); 128 } 129 130 return cond; 131 } 132 133 static inline int audio_bits_to_index (int bits) 134 { 135 switch (bits) { 136 case 8: 137 return 0; 138 139 case 16: 140 return 1; 141 142 case 32: 143 return 2; 144 145 default: 146 audio_bug ("bits_to_index", 1); 147 AUD_log (NULL, "invalid bits %d\n", bits); 148 return 0; 149 } 150 } 151 152 void AUD_vlog (const char *cap, const char *fmt, va_list ap) 153 { 154 if (cap) { 155 fprintf(stderr, "%s: ", cap); 156 } 157 158 vfprintf(stderr, fmt, ap); 159 } 160 161 void AUD_log (const char *cap, const char *fmt, ...) 162 { 163 va_list ap; 164 165 va_start (ap, fmt); 166 AUD_vlog (cap, fmt, ap); 167 va_end (ap); 168 } 169 170 static void audio_print_settings (struct audsettings *as) 171 { 172 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels); 173 174 switch (as->fmt) { 175 case AUDIO_FORMAT_S8: 176 AUD_log (NULL, "S8"); 177 break; 178 case AUDIO_FORMAT_U8: 179 AUD_log (NULL, "U8"); 180 break; 181 case AUDIO_FORMAT_S16: 182 AUD_log (NULL, "S16"); 183 break; 184 case AUDIO_FORMAT_U16: 185 AUD_log (NULL, "U16"); 186 break; 187 case AUDIO_FORMAT_S32: 188 AUD_log (NULL, "S32"); 189 break; 190 case AUDIO_FORMAT_U32: 191 AUD_log (NULL, "U32"); 192 break; 193 case AUDIO_FORMAT_F32: 194 AUD_log (NULL, "F32"); 195 break; 196 default: 197 AUD_log (NULL, "invalid(%d)", as->fmt); 198 break; 199 } 200 201 AUD_log (NULL, " endianness="); 202 switch (as->endianness) { 203 case 0: 204 AUD_log (NULL, "little"); 205 break; 206 case 1: 207 AUD_log (NULL, "big"); 208 break; 209 default: 210 AUD_log (NULL, "invalid"); 211 break; 212 } 213 AUD_log (NULL, "\n"); 214 } 215 216 static int audio_validate_settings (struct audsettings *as) 217 { 218 int invalid; 219 220 invalid = as->nchannels < 1; 221 invalid |= as->endianness != 0 && as->endianness != 1; 222 223 switch (as->fmt) { 224 case AUDIO_FORMAT_S8: 225 case AUDIO_FORMAT_U8: 226 case AUDIO_FORMAT_S16: 227 case AUDIO_FORMAT_U16: 228 case AUDIO_FORMAT_S32: 229 case AUDIO_FORMAT_U32: 230 case AUDIO_FORMAT_F32: 231 break; 232 default: 233 invalid = 1; 234 break; 235 } 236 237 invalid |= as->freq <= 0; 238 return invalid ? -1 : 0; 239 } 240 241 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as) 242 { 243 int bits = 8; 244 bool is_signed = false, is_float = false; 245 246 switch (as->fmt) { 247 case AUDIO_FORMAT_S8: 248 is_signed = true; 249 /* fall through */ 250 case AUDIO_FORMAT_U8: 251 break; 252 253 case AUDIO_FORMAT_S16: 254 is_signed = true; 255 /* fall through */ 256 case AUDIO_FORMAT_U16: 257 bits = 16; 258 break; 259 260 case AUDIO_FORMAT_F32: 261 is_float = true; 262 /* fall through */ 263 case AUDIO_FORMAT_S32: 264 is_signed = true; 265 /* fall through */ 266 case AUDIO_FORMAT_U32: 267 bits = 32; 268 break; 269 270 default: 271 abort(); 272 } 273 return info->freq == as->freq 274 && info->nchannels == as->nchannels 275 && info->is_signed == is_signed 276 && info->is_float == is_float 277 && info->bits == bits 278 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS); 279 } 280 281 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as) 282 { 283 int bits = 8, mul; 284 bool is_signed = false, is_float = false; 285 286 switch (as->fmt) { 287 case AUDIO_FORMAT_S8: 288 is_signed = true; 289 /* fall through */ 290 case AUDIO_FORMAT_U8: 291 mul = 1; 292 break; 293 294 case AUDIO_FORMAT_S16: 295 is_signed = true; 296 /* fall through */ 297 case AUDIO_FORMAT_U16: 298 bits = 16; 299 mul = 2; 300 break; 301 302 case AUDIO_FORMAT_F32: 303 is_float = true; 304 /* fall through */ 305 case AUDIO_FORMAT_S32: 306 is_signed = true; 307 /* fall through */ 308 case AUDIO_FORMAT_U32: 309 bits = 32; 310 mul = 4; 311 break; 312 313 default: 314 abort(); 315 } 316 317 info->freq = as->freq; 318 info->bits = bits; 319 info->is_signed = is_signed; 320 info->is_float = is_float; 321 info->nchannels = as->nchannels; 322 info->bytes_per_frame = as->nchannels * mul; 323 info->bytes_per_second = info->freq * info->bytes_per_frame; 324 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS); 325 } 326 327 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) 328 { 329 if (!len) { 330 return; 331 } 332 333 if (info->is_signed || info->is_float) { 334 memset(buf, 0x00, len * info->bytes_per_frame); 335 } else { 336 switch (info->bits) { 337 case 8: 338 memset(buf, 0x80, len * info->bytes_per_frame); 339 break; 340 341 case 16: 342 { 343 int i; 344 uint16_t *p = buf; 345 short s = INT16_MAX; 346 347 if (info->swap_endianness) { 348 s = bswap16 (s); 349 } 350 351 for (i = 0; i < len * info->nchannels; i++) { 352 p[i] = s; 353 } 354 } 355 break; 356 357 case 32: 358 { 359 int i; 360 uint32_t *p = buf; 361 int32_t s = INT32_MAX; 362 363 if (info->swap_endianness) { 364 s = bswap32 (s); 365 } 366 367 for (i = 0; i < len * info->nchannels; i++) { 368 p[i] = s; 369 } 370 } 371 break; 372 373 default: 374 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n", 375 info->bits); 376 break; 377 } 378 } 379 } 380 381 /* 382 * Capture 383 */ 384 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s, 385 struct audsettings *as) 386 { 387 CaptureVoiceOut *cap; 388 389 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 390 if (audio_pcm_info_eq (&cap->hw.info, as)) { 391 return cap; 392 } 393 } 394 return NULL; 395 } 396 397 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd) 398 { 399 struct capture_callback *cb; 400 401 #ifdef DEBUG_CAPTURE 402 dolog ("notification %d sent\n", cmd); 403 #endif 404 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 405 cb->ops.notify (cb->opaque, cmd); 406 } 407 } 408 409 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled) 410 { 411 if (cap->hw.enabled != enabled) { 412 audcnotification_e cmd; 413 cap->hw.enabled = enabled; 414 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE; 415 audio_notify_capture (cap, cmd); 416 } 417 } 418 419 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap) 420 { 421 HWVoiceOut *hw = &cap->hw; 422 SWVoiceOut *sw; 423 int enabled = 0; 424 425 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 426 if (sw->active) { 427 enabled = 1; 428 break; 429 } 430 } 431 audio_capture_maybe_changed (cap, enabled); 432 } 433 434 static void audio_detach_capture (HWVoiceOut *hw) 435 { 436 SWVoiceCap *sc = hw->cap_head.lh_first; 437 438 while (sc) { 439 SWVoiceCap *sc1 = sc->entries.le_next; 440 SWVoiceOut *sw = &sc->sw; 441 CaptureVoiceOut *cap = sc->cap; 442 int was_active = sw->active; 443 444 if (sw->rate) { 445 st_rate_stop (sw->rate); 446 sw->rate = NULL; 447 } 448 449 QLIST_REMOVE (sw, entries); 450 QLIST_REMOVE (sc, entries); 451 g_free (sc); 452 if (was_active) { 453 /* We have removed soft voice from the capture: 454 this might have changed the overall status of the capture 455 since this might have been the only active voice */ 456 audio_recalc_and_notify_capture (cap); 457 } 458 sc = sc1; 459 } 460 } 461 462 static int audio_attach_capture (HWVoiceOut *hw) 463 { 464 AudioState *s = hw->s; 465 CaptureVoiceOut *cap; 466 467 audio_detach_capture (hw); 468 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 469 SWVoiceCap *sc; 470 SWVoiceOut *sw; 471 HWVoiceOut *hw_cap = &cap->hw; 472 473 sc = g_malloc0(sizeof(*sc)); 474 475 sc->cap = cap; 476 sw = &sc->sw; 477 sw->hw = hw_cap; 478 sw->info = hw->info; 479 sw->empty = 1; 480 sw->active = hw->enabled; 481 sw->vol = nominal_volume; 482 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq); 483 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries); 484 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries); 485 #ifdef DEBUG_CAPTURE 486 sw->name = g_strdup_printf ("for %p %d,%d,%d", 487 hw, sw->info.freq, sw->info.bits, 488 sw->info.nchannels); 489 dolog ("Added %s active = %d\n", sw->name, sw->active); 490 #endif 491 if (sw->active) { 492 audio_capture_maybe_changed (cap, 1); 493 } 494 } 495 return 0; 496 } 497 498 /* 499 * Hard voice (capture) 500 */ 501 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw) 502 { 503 SWVoiceIn *sw; 504 size_t m = hw->total_samples_captured; 505 506 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 507 if (sw->active) { 508 m = MIN (m, sw->total_hw_samples_acquired); 509 } 510 } 511 return m; 512 } 513 514 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw) 515 { 516 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw); 517 if (audio_bug(__func__, live > hw->conv_buf.size)) { 518 dolog("live=%zu hw->conv_buf.size=%zu\n", live, hw->conv_buf.size); 519 return 0; 520 } 521 return live; 522 } 523 524 static size_t audio_pcm_hw_conv_in(HWVoiceIn *hw, void *pcm_buf, size_t samples) 525 { 526 size_t conv = 0; 527 STSampleBuffer *conv_buf = &hw->conv_buf; 528 529 while (samples) { 530 uint8_t *src = advance(pcm_buf, conv * hw->info.bytes_per_frame); 531 size_t proc = MIN(samples, conv_buf->size - conv_buf->pos); 532 533 hw->conv(conv_buf->buffer + conv_buf->pos, src, proc); 534 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size; 535 samples -= proc; 536 conv += proc; 537 } 538 539 return conv; 540 } 541 542 /* 543 * Soft voice (capture) 544 */ 545 static void audio_pcm_sw_resample_in(SWVoiceIn *sw, 546 size_t frames_in_max, size_t frames_out_max, 547 size_t *total_in, size_t *total_out) 548 { 549 HWVoiceIn *hw = sw->hw; 550 struct st_sample *src, *dst; 551 size_t live, rpos, frames_in, frames_out; 552 553 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 554 rpos = audio_ring_posb(hw->conv_buf.pos, live, hw->conv_buf.size); 555 556 /* resample conv_buf from rpos to end of buffer */ 557 src = hw->conv_buf.buffer + rpos; 558 frames_in = MIN(frames_in_max, hw->conv_buf.size - rpos); 559 dst = sw->resample_buf.buffer; 560 frames_out = frames_out_max; 561 st_rate_flow(sw->rate, src, dst, &frames_in, &frames_out); 562 rpos += frames_in; 563 *total_in = frames_in; 564 *total_out = frames_out; 565 566 /* resample conv_buf from start of buffer if there are input frames left */ 567 if (frames_in_max - frames_in && rpos == hw->conv_buf.size) { 568 src = hw->conv_buf.buffer; 569 frames_in = frames_in_max - frames_in; 570 dst += frames_out; 571 frames_out = frames_out_max - frames_out; 572 st_rate_flow(sw->rate, src, dst, &frames_in, &frames_out); 573 *total_in += frames_in; 574 *total_out += frames_out; 575 } 576 } 577 578 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t buf_len) 579 { 580 HWVoiceIn *hw = sw->hw; 581 size_t live, frames_out_max, total_in, total_out; 582 583 live = hw->total_samples_captured - sw->total_hw_samples_acquired; 584 if (!live) { 585 return 0; 586 } 587 if (audio_bug(__func__, live > hw->conv_buf.size)) { 588 dolog("live_in=%zu hw->conv_buf.size=%zu\n", live, hw->conv_buf.size); 589 return 0; 590 } 591 592 frames_out_max = MIN(buf_len / sw->info.bytes_per_frame, 593 sw->resample_buf.size); 594 595 audio_pcm_sw_resample_in(sw, live, frames_out_max, &total_in, &total_out); 596 597 if (!hw->pcm_ops->volume_in) { 598 mixeng_volume(sw->resample_buf.buffer, total_out, &sw->vol); 599 } 600 sw->clip(buf, sw->resample_buf.buffer, total_out); 601 602 sw->total_hw_samples_acquired += total_in; 603 return total_out * sw->info.bytes_per_frame; 604 } 605 606 /* 607 * Hard voice (playback) 608 */ 609 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) 610 { 611 SWVoiceOut *sw; 612 size_t m = SIZE_MAX; 613 int nb_live = 0; 614 615 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 616 if (sw->active || !sw->empty) { 617 m = MIN (m, sw->total_hw_samples_mixed); 618 nb_live += 1; 619 } 620 } 621 622 *nb_livep = nb_live; 623 return m; 624 } 625 626 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live) 627 { 628 size_t smin; 629 int nb_live1; 630 631 smin = audio_pcm_hw_find_min_out (hw, &nb_live1); 632 if (nb_live) { 633 *nb_live = nb_live1; 634 } 635 636 if (nb_live1) { 637 size_t live = smin; 638 639 if (audio_bug(__func__, live > hw->mix_buf.size)) { 640 dolog("live=%zu hw->mix_buf.size=%zu\n", live, hw->mix_buf.size); 641 return 0; 642 } 643 return live; 644 } 645 return 0; 646 } 647 648 static size_t audio_pcm_hw_get_free(HWVoiceOut *hw) 649 { 650 return (hw->pcm_ops->buffer_get_free ? hw->pcm_ops->buffer_get_free(hw) : 651 INT_MAX) / hw->info.bytes_per_frame; 652 } 653 654 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len) 655 { 656 size_t clipped = 0; 657 size_t pos = hw->mix_buf.pos; 658 659 while (len) { 660 st_sample *src = hw->mix_buf.buffer + pos; 661 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame); 662 size_t samples_till_end_of_buf = hw->mix_buf.size - pos; 663 size_t samples_to_clip = MIN(len, samples_till_end_of_buf); 664 665 hw->clip(dst, src, samples_to_clip); 666 667 pos = (pos + samples_to_clip) % hw->mix_buf.size; 668 len -= samples_to_clip; 669 clipped += samples_to_clip; 670 } 671 } 672 673 /* 674 * Soft voice (playback) 675 */ 676 static void audio_pcm_sw_resample_out(SWVoiceOut *sw, 677 size_t frames_in_max, size_t frames_out_max, 678 size_t *total_in, size_t *total_out) 679 { 680 HWVoiceOut *hw = sw->hw; 681 struct st_sample *src, *dst; 682 size_t live, wpos, frames_in, frames_out; 683 684 live = sw->total_hw_samples_mixed; 685 wpos = (hw->mix_buf.pos + live) % hw->mix_buf.size; 686 687 /* write to mix_buf from wpos to end of buffer */ 688 src = sw->resample_buf.buffer; 689 frames_in = frames_in_max; 690 dst = hw->mix_buf.buffer + wpos; 691 frames_out = MIN(frames_out_max, hw->mix_buf.size - wpos); 692 st_rate_flow_mix(sw->rate, src, dst, &frames_in, &frames_out); 693 wpos += frames_out; 694 *total_in = frames_in; 695 *total_out = frames_out; 696 697 /* write to mix_buf from start of buffer if there are input frames left */ 698 if (frames_in_max - frames_in > 0 && wpos == hw->mix_buf.size) { 699 src += frames_in; 700 frames_in = frames_in_max - frames_in; 701 dst = hw->mix_buf.buffer; 702 frames_out = frames_out_max - frames_out; 703 st_rate_flow_mix(sw->rate, src, dst, &frames_in, &frames_out); 704 *total_in += frames_in; 705 *total_out += frames_out; 706 } 707 } 708 709 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t buf_len) 710 { 711 HWVoiceOut *hw = sw->hw; 712 size_t live, dead, hw_free, sw_max, fe_max; 713 size_t frames_in_max, frames_out_max, total_in, total_out; 714 715 live = sw->total_hw_samples_mixed; 716 if (audio_bug(__func__, live > hw->mix_buf.size)) { 717 dolog("live=%zu hw->mix_buf.size=%zu\n", live, hw->mix_buf.size); 718 return 0; 719 } 720 721 if (live == hw->mix_buf.size) { 722 #ifdef DEBUG_OUT 723 dolog ("%s is full %zu\n", sw->name, live); 724 #endif 725 return 0; 726 } 727 728 dead = hw->mix_buf.size - live; 729 hw_free = audio_pcm_hw_get_free(hw); 730 hw_free = hw_free > live ? hw_free - live : 0; 731 frames_out_max = MIN(dead, hw_free); 732 sw_max = st_rate_frames_in(sw->rate, frames_out_max); 733 fe_max = MIN(buf_len / sw->info.bytes_per_frame + sw->resample_buf.pos, 734 sw->resample_buf.size); 735 frames_in_max = MIN(sw_max, fe_max); 736 737 if (!frames_in_max) { 738 return 0; 739 } 740 741 if (frames_in_max > sw->resample_buf.pos) { 742 sw->conv(sw->resample_buf.buffer + sw->resample_buf.pos, 743 buf, frames_in_max - sw->resample_buf.pos); 744 if (!sw->hw->pcm_ops->volume_out) { 745 mixeng_volume(sw->resample_buf.buffer + sw->resample_buf.pos, 746 frames_in_max - sw->resample_buf.pos, &sw->vol); 747 } 748 } 749 750 audio_pcm_sw_resample_out(sw, frames_in_max, frames_out_max, 751 &total_in, &total_out); 752 753 sw->total_hw_samples_mixed += total_out; 754 sw->empty = sw->total_hw_samples_mixed == 0; 755 756 /* 757 * Upsampling may leave one audio frame in the resample buffer. Decrement 758 * total_in by one if there was a leftover frame from the previous resample 759 * pass in the resample buffer. Increment total_in by one if the current 760 * resample pass left one frame in the resample buffer. 761 */ 762 if (frames_in_max - total_in == 1) { 763 /* copy one leftover audio frame to the beginning of the buffer */ 764 *sw->resample_buf.buffer = *(sw->resample_buf.buffer + total_in); 765 total_in += 1 - sw->resample_buf.pos; 766 sw->resample_buf.pos = 1; 767 } else if (total_in >= sw->resample_buf.pos) { 768 total_in -= sw->resample_buf.pos; 769 sw->resample_buf.pos = 0; 770 } 771 772 #ifdef DEBUG_OUT 773 dolog ( 774 "%s: write size %zu written %zu total mixed %zu\n", 775 SW_NAME(sw), 776 buf_len / sw->info.bytes_per_frame, 777 total_in, 778 sw->total_hw_samples_mixed 779 ); 780 #endif 781 782 return total_in * sw->info.bytes_per_frame; 783 } 784 785 #ifdef DEBUG_AUDIO 786 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) 787 { 788 dolog("%s: bits %d, sign %d, float %d, freq %d, nchan %d\n", 789 cap, info->bits, info->is_signed, info->is_float, info->freq, 790 info->nchannels); 791 } 792 #endif 793 794 #define DAC 795 #include "audio_template.h" 796 #undef DAC 797 #include "audio_template.h" 798 799 /* 800 * Timer 801 */ 802 static int audio_is_timer_needed(AudioState *s) 803 { 804 HWVoiceIn *hwi = NULL; 805 HWVoiceOut *hwo = NULL; 806 807 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 808 if (!hwo->poll_mode) { 809 return 1; 810 } 811 } 812 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 813 if (!hwi->poll_mode) { 814 return 1; 815 } 816 } 817 return 0; 818 } 819 820 static void audio_reset_timer (AudioState *s) 821 { 822 if (audio_is_timer_needed(s)) { 823 timer_mod_anticipate_ns(s->ts, 824 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks); 825 if (!s->timer_running) { 826 s->timer_running = true; 827 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 828 trace_audio_timer_start(s->period_ticks / SCALE_MS); 829 } 830 } else { 831 timer_del(s->ts); 832 if (s->timer_running) { 833 s->timer_running = false; 834 trace_audio_timer_stop(); 835 } 836 } 837 } 838 839 static void audio_timer (void *opaque) 840 { 841 int64_t now, diff; 842 AudioState *s = opaque; 843 844 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 845 diff = now - s->timer_last; 846 if (diff > s->period_ticks * 3 / 2) { 847 trace_audio_timer_delayed(diff / SCALE_MS); 848 } 849 s->timer_last = now; 850 851 audio_run(s, "timer"); 852 audio_reset_timer(s); 853 } 854 855 /* 856 * Public API 857 */ 858 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size) 859 { 860 HWVoiceOut *hw; 861 862 if (!sw) { 863 /* XXX: Consider options */ 864 return size; 865 } 866 hw = sw->hw; 867 868 if (!hw->enabled) { 869 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)); 870 return 0; 871 } 872 873 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) { 874 return audio_pcm_sw_write(sw, buf, size); 875 } else { 876 return hw->pcm_ops->write(hw, buf, size); 877 } 878 } 879 880 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size) 881 { 882 HWVoiceIn *hw; 883 884 if (!sw) { 885 /* XXX: Consider options */ 886 return size; 887 } 888 hw = sw->hw; 889 890 if (!hw->enabled) { 891 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)); 892 return 0; 893 } 894 895 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) { 896 return audio_pcm_sw_read(sw, buf, size); 897 } else { 898 return hw->pcm_ops->read(hw, buf, size); 899 } 900 } 901 902 int AUD_get_buffer_size_out(SWVoiceOut *sw) 903 { 904 return sw->hw->samples * sw->hw->info.bytes_per_frame; 905 } 906 907 void AUD_set_active_out (SWVoiceOut *sw, int on) 908 { 909 HWVoiceOut *hw; 910 911 if (!sw) { 912 return; 913 } 914 915 hw = sw->hw; 916 if (sw->active != on) { 917 AudioState *s = sw->s; 918 SWVoiceOut *temp_sw; 919 SWVoiceCap *sc; 920 921 if (on) { 922 hw->pending_disable = 0; 923 if (!hw->enabled) { 924 hw->enabled = 1; 925 if (s->vm_running) { 926 if (hw->pcm_ops->enable_out) { 927 hw->pcm_ops->enable_out(hw, true); 928 } 929 audio_reset_timer (s); 930 } 931 } 932 } else { 933 if (hw->enabled) { 934 int nb_active = 0; 935 936 for (temp_sw = hw->sw_head.lh_first; temp_sw; 937 temp_sw = temp_sw->entries.le_next) { 938 nb_active += temp_sw->active != 0; 939 } 940 941 hw->pending_disable = nb_active == 1; 942 } 943 } 944 945 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 946 sc->sw.active = hw->enabled; 947 if (hw->enabled) { 948 audio_capture_maybe_changed (sc->cap, 1); 949 } 950 } 951 sw->active = on; 952 } 953 } 954 955 void AUD_set_active_in (SWVoiceIn *sw, int on) 956 { 957 HWVoiceIn *hw; 958 959 if (!sw) { 960 return; 961 } 962 963 hw = sw->hw; 964 if (sw->active != on) { 965 AudioState *s = sw->s; 966 SWVoiceIn *temp_sw; 967 968 if (on) { 969 if (!hw->enabled) { 970 hw->enabled = 1; 971 if (s->vm_running) { 972 if (hw->pcm_ops->enable_in) { 973 hw->pcm_ops->enable_in(hw, true); 974 } 975 audio_reset_timer (s); 976 } 977 } 978 sw->total_hw_samples_acquired = hw->total_samples_captured; 979 } else { 980 if (hw->enabled) { 981 int nb_active = 0; 982 983 for (temp_sw = hw->sw_head.lh_first; temp_sw; 984 temp_sw = temp_sw->entries.le_next) { 985 nb_active += temp_sw->active != 0; 986 } 987 988 if (nb_active == 1) { 989 hw->enabled = 0; 990 if (hw->pcm_ops->enable_in) { 991 hw->pcm_ops->enable_in(hw, false); 992 } 993 } 994 } 995 } 996 sw->active = on; 997 } 998 } 999 1000 static size_t audio_get_avail (SWVoiceIn *sw) 1001 { 1002 size_t live; 1003 1004 if (!sw) { 1005 return 0; 1006 } 1007 1008 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; 1009 if (audio_bug(__func__, live > sw->hw->conv_buf.size)) { 1010 dolog("live=%zu sw->hw->conv_buf.size=%zu\n", live, 1011 sw->hw->conv_buf.size); 1012 return 0; 1013 } 1014 1015 ldebug ( 1016 "%s: get_avail live %zu frontend frames %u\n", 1017 SW_NAME (sw), 1018 live, st_rate_frames_out(sw->rate, live) 1019 ); 1020 1021 return live; 1022 } 1023 1024 static size_t audio_get_free(SWVoiceOut *sw) 1025 { 1026 size_t live, dead; 1027 1028 if (!sw) { 1029 return 0; 1030 } 1031 1032 live = sw->total_hw_samples_mixed; 1033 1034 if (audio_bug(__func__, live > sw->hw->mix_buf.size)) { 1035 dolog("live=%zu sw->hw->mix_buf.size=%zu\n", live, 1036 sw->hw->mix_buf.size); 1037 return 0; 1038 } 1039 1040 dead = sw->hw->mix_buf.size - live; 1041 1042 #ifdef DEBUG_OUT 1043 dolog("%s: get_free live %zu dead %zu frontend frames %u\n", 1044 SW_NAME(sw), live, dead, st_rate_frames_in(sw->rate, dead)); 1045 #endif 1046 1047 return dead; 1048 } 1049 1050 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos, 1051 size_t samples) 1052 { 1053 size_t n; 1054 1055 if (hw->enabled) { 1056 SWVoiceCap *sc; 1057 1058 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1059 SWVoiceOut *sw = &sc->sw; 1060 size_t rpos2 = rpos; 1061 1062 n = samples; 1063 while (n) { 1064 size_t till_end_of_hw = hw->mix_buf.size - rpos2; 1065 size_t to_read = MIN(till_end_of_hw, n); 1066 size_t live, frames_in, frames_out; 1067 1068 sw->resample_buf.buffer = hw->mix_buf.buffer + rpos2; 1069 sw->resample_buf.size = to_read; 1070 live = sw->total_hw_samples_mixed; 1071 1072 audio_pcm_sw_resample_out(sw, 1073 to_read, sw->hw->mix_buf.size - live, 1074 &frames_in, &frames_out); 1075 1076 sw->total_hw_samples_mixed += frames_out; 1077 sw->empty = sw->total_hw_samples_mixed == 0; 1078 1079 if (to_read - frames_in) { 1080 dolog("Could not mix %zu frames into a capture " 1081 "buffer, mixed %zu\n", 1082 to_read, frames_in); 1083 break; 1084 } 1085 n -= to_read; 1086 rpos2 = (rpos2 + to_read) % hw->mix_buf.size; 1087 } 1088 } 1089 } 1090 1091 n = MIN(samples, hw->mix_buf.size - rpos); 1092 mixeng_clear(hw->mix_buf.buffer + rpos, n); 1093 mixeng_clear(hw->mix_buf.buffer, samples - n); 1094 } 1095 1096 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live) 1097 { 1098 size_t clipped = 0; 1099 1100 while (live) { 1101 size_t size = live * hw->info.bytes_per_frame; 1102 size_t decr, proc; 1103 void *buf = hw->pcm_ops->get_buffer_out(hw, &size); 1104 1105 if (size == 0) { 1106 break; 1107 } 1108 1109 decr = MIN(size / hw->info.bytes_per_frame, live); 1110 if (buf) { 1111 audio_pcm_hw_clip_out(hw, buf, decr); 1112 } 1113 proc = hw->pcm_ops->put_buffer_out(hw, buf, 1114 decr * hw->info.bytes_per_frame) / 1115 hw->info.bytes_per_frame; 1116 1117 live -= proc; 1118 clipped += proc; 1119 hw->mix_buf.pos = (hw->mix_buf.pos + proc) % hw->mix_buf.size; 1120 1121 if (proc == 0 || proc < decr) { 1122 break; 1123 } 1124 } 1125 1126 if (hw->pcm_ops->run_buffer_out) { 1127 hw->pcm_ops->run_buffer_out(hw); 1128 } 1129 1130 return clipped; 1131 } 1132 1133 static void audio_run_out (AudioState *s) 1134 { 1135 HWVoiceOut *hw = NULL; 1136 SWVoiceOut *sw; 1137 1138 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) { 1139 size_t played, live, prev_rpos; 1140 size_t hw_free = audio_pcm_hw_get_free(hw); 1141 int nb_live; 1142 1143 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1144 /* there is exactly 1 sw for each hw with no mixeng */ 1145 sw = hw->sw_head.lh_first; 1146 1147 if (hw->pending_disable) { 1148 hw->enabled = 0; 1149 hw->pending_disable = 0; 1150 if (hw->pcm_ops->enable_out) { 1151 hw->pcm_ops->enable_out(hw, false); 1152 } 1153 } 1154 1155 if (sw->active) { 1156 sw->callback.fn(sw->callback.opaque, 1157 hw_free * sw->info.bytes_per_frame); 1158 } 1159 1160 if (hw->pcm_ops->run_buffer_out) { 1161 hw->pcm_ops->run_buffer_out(hw); 1162 } 1163 1164 continue; 1165 } 1166 1167 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1168 if (sw->active) { 1169 size_t sw_free = audio_get_free(sw); 1170 size_t free; 1171 1172 if (hw_free > sw->total_hw_samples_mixed) { 1173 free = st_rate_frames_in(sw->rate, 1174 MIN(sw_free, hw_free - sw->total_hw_samples_mixed)); 1175 } else { 1176 free = 0; 1177 } 1178 if (free > sw->resample_buf.pos) { 1179 free = MIN(free, sw->resample_buf.size) 1180 - sw->resample_buf.pos; 1181 sw->callback.fn(sw->callback.opaque, 1182 free * sw->info.bytes_per_frame); 1183 } 1184 } 1185 } 1186 1187 live = audio_pcm_hw_get_live_out (hw, &nb_live); 1188 if (!nb_live) { 1189 live = 0; 1190 } 1191 1192 if (audio_bug(__func__, live > hw->mix_buf.size)) { 1193 dolog("live=%zu hw->mix_buf.size=%zu\n", live, hw->mix_buf.size); 1194 continue; 1195 } 1196 1197 if (hw->pending_disable && !nb_live) { 1198 SWVoiceCap *sc; 1199 #ifdef DEBUG_OUT 1200 dolog ("Disabling voice\n"); 1201 #endif 1202 hw->enabled = 0; 1203 hw->pending_disable = 0; 1204 if (hw->pcm_ops->enable_out) { 1205 hw->pcm_ops->enable_out(hw, false); 1206 } 1207 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1208 sc->sw.active = 0; 1209 audio_recalc_and_notify_capture (sc->cap); 1210 } 1211 continue; 1212 } 1213 1214 if (!live) { 1215 if (hw->pcm_ops->run_buffer_out) { 1216 hw->pcm_ops->run_buffer_out(hw); 1217 } 1218 continue; 1219 } 1220 1221 prev_rpos = hw->mix_buf.pos; 1222 played = audio_pcm_hw_run_out(hw, live); 1223 replay_audio_out(&played); 1224 if (audio_bug(__func__, hw->mix_buf.pos >= hw->mix_buf.size)) { 1225 dolog("hw->mix_buf.pos=%zu hw->mix_buf.size=%zu played=%zu\n", 1226 hw->mix_buf.pos, hw->mix_buf.size, played); 1227 hw->mix_buf.pos = 0; 1228 } 1229 1230 #ifdef DEBUG_OUT 1231 dolog("played=%zu\n", played); 1232 #endif 1233 1234 if (played) { 1235 hw->ts_helper += played; 1236 audio_capture_mix_and_clear (hw, prev_rpos, played); 1237 } 1238 1239 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1240 if (!sw->active && sw->empty) { 1241 continue; 1242 } 1243 1244 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) { 1245 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n", 1246 played, sw->total_hw_samples_mixed); 1247 played = sw->total_hw_samples_mixed; 1248 } 1249 1250 sw->total_hw_samples_mixed -= played; 1251 1252 if (!sw->total_hw_samples_mixed) { 1253 sw->empty = 1; 1254 } 1255 } 1256 } 1257 } 1258 1259 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples) 1260 { 1261 size_t conv = 0; 1262 1263 if (hw->pcm_ops->run_buffer_in) { 1264 hw->pcm_ops->run_buffer_in(hw); 1265 } 1266 1267 while (samples) { 1268 size_t proc; 1269 size_t size = samples * hw->info.bytes_per_frame; 1270 void *buf = hw->pcm_ops->get_buffer_in(hw, &size); 1271 1272 assert(size % hw->info.bytes_per_frame == 0); 1273 if (size == 0) { 1274 break; 1275 } 1276 1277 proc = audio_pcm_hw_conv_in(hw, buf, size / hw->info.bytes_per_frame); 1278 1279 samples -= proc; 1280 conv += proc; 1281 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame); 1282 } 1283 1284 return conv; 1285 } 1286 1287 static void audio_run_in (AudioState *s) 1288 { 1289 HWVoiceIn *hw = NULL; 1290 1291 if (!audio_get_pdo_in(s->dev)->mixing_engine) { 1292 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1293 /* there is exactly 1 sw for each hw with no mixeng */ 1294 SWVoiceIn *sw = hw->sw_head.lh_first; 1295 if (sw->active) { 1296 sw->callback.fn(sw->callback.opaque, INT_MAX); 1297 } 1298 } 1299 return; 1300 } 1301 1302 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) { 1303 SWVoiceIn *sw; 1304 size_t captured = 0, min; 1305 1306 if (replay_mode != REPLAY_MODE_PLAY) { 1307 captured = audio_pcm_hw_run_in( 1308 hw, hw->conv_buf.size - audio_pcm_hw_get_live_in(hw)); 1309 } 1310 replay_audio_in(&captured, hw->conv_buf.buffer, &hw->conv_buf.pos, 1311 hw->conv_buf.size); 1312 1313 min = audio_pcm_hw_find_min_in (hw); 1314 hw->total_samples_captured += captured - min; 1315 hw->ts_helper += captured; 1316 1317 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1318 sw->total_hw_samples_acquired -= min; 1319 1320 if (sw->active) { 1321 size_t sw_avail = audio_get_avail(sw); 1322 size_t avail; 1323 1324 avail = st_rate_frames_out(sw->rate, sw_avail); 1325 if (avail > 0) { 1326 avail = MIN(avail, sw->resample_buf.size); 1327 sw->callback.fn(sw->callback.opaque, 1328 avail * sw->info.bytes_per_frame); 1329 } 1330 } 1331 } 1332 } 1333 } 1334 1335 static void audio_run_capture (AudioState *s) 1336 { 1337 CaptureVoiceOut *cap; 1338 1339 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) { 1340 size_t live, rpos, captured; 1341 HWVoiceOut *hw = &cap->hw; 1342 SWVoiceOut *sw; 1343 1344 captured = live = audio_pcm_hw_get_live_out (hw, NULL); 1345 rpos = hw->mix_buf.pos; 1346 while (live) { 1347 size_t left = hw->mix_buf.size - rpos; 1348 size_t to_capture = MIN(live, left); 1349 struct st_sample *src; 1350 struct capture_callback *cb; 1351 1352 src = hw->mix_buf.buffer + rpos; 1353 hw->clip (cap->buf, src, to_capture); 1354 mixeng_clear (src, to_capture); 1355 1356 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1357 cb->ops.capture (cb->opaque, cap->buf, 1358 to_capture * hw->info.bytes_per_frame); 1359 } 1360 rpos = (rpos + to_capture) % hw->mix_buf.size; 1361 live -= to_capture; 1362 } 1363 hw->mix_buf.pos = rpos; 1364 1365 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) { 1366 if (!sw->active && sw->empty) { 1367 continue; 1368 } 1369 1370 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) { 1371 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n", 1372 captured, sw->total_hw_samples_mixed); 1373 captured = sw->total_hw_samples_mixed; 1374 } 1375 1376 sw->total_hw_samples_mixed -= captured; 1377 sw->empty = sw->total_hw_samples_mixed == 0; 1378 } 1379 } 1380 } 1381 1382 void audio_run(AudioState *s, const char *msg) 1383 { 1384 audio_run_out(s); 1385 audio_run_in(s); 1386 audio_run_capture(s); 1387 1388 #ifdef DEBUG_POLL 1389 { 1390 static double prevtime; 1391 double currtime; 1392 struct timeval tv; 1393 1394 if (gettimeofday (&tv, NULL)) { 1395 perror ("audio_run: gettimeofday"); 1396 return; 1397 } 1398 1399 currtime = tv.tv_sec + tv.tv_usec * 1e-6; 1400 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime); 1401 prevtime = currtime; 1402 } 1403 #endif 1404 } 1405 1406 void audio_generic_run_buffer_in(HWVoiceIn *hw) 1407 { 1408 if (unlikely(!hw->buf_emul)) { 1409 hw->size_emul = hw->samples * hw->info.bytes_per_frame; 1410 hw->buf_emul = g_malloc(hw->size_emul); 1411 hw->pos_emul = hw->pending_emul = 0; 1412 } 1413 1414 while (hw->pending_emul < hw->size_emul) { 1415 size_t read_len = MIN(hw->size_emul - hw->pos_emul, 1416 hw->size_emul - hw->pending_emul); 1417 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul, 1418 read_len); 1419 hw->pending_emul += read; 1420 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul; 1421 if (read < read_len) { 1422 break; 1423 } 1424 } 1425 } 1426 1427 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size) 1428 { 1429 size_t start; 1430 1431 start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul); 1432 assert(start < hw->size_emul); 1433 1434 *size = MIN(*size, hw->pending_emul); 1435 *size = MIN(*size, hw->size_emul - start); 1436 return hw->buf_emul + start; 1437 } 1438 1439 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size) 1440 { 1441 assert(size <= hw->pending_emul); 1442 hw->pending_emul -= size; 1443 } 1444 1445 size_t audio_generic_buffer_get_free(HWVoiceOut *hw) 1446 { 1447 if (hw->buf_emul) { 1448 return hw->size_emul - hw->pending_emul; 1449 } else { 1450 return hw->samples * hw->info.bytes_per_frame; 1451 } 1452 } 1453 1454 void audio_generic_run_buffer_out(HWVoiceOut *hw) 1455 { 1456 while (hw->pending_emul) { 1457 size_t write_len, written, start; 1458 1459 start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul); 1460 assert(start < hw->size_emul); 1461 1462 write_len = MIN(hw->pending_emul, hw->size_emul - start); 1463 1464 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len); 1465 hw->pending_emul -= written; 1466 1467 if (written < write_len) { 1468 break; 1469 } 1470 } 1471 } 1472 1473 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size) 1474 { 1475 if (unlikely(!hw->buf_emul)) { 1476 hw->size_emul = hw->samples * hw->info.bytes_per_frame; 1477 hw->buf_emul = g_malloc(hw->size_emul); 1478 hw->pos_emul = hw->pending_emul = 0; 1479 } 1480 1481 *size = MIN(hw->size_emul - hw->pending_emul, 1482 hw->size_emul - hw->pos_emul); 1483 return hw->buf_emul + hw->pos_emul; 1484 } 1485 1486 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) 1487 { 1488 assert(buf == hw->buf_emul + hw->pos_emul && 1489 size + hw->pending_emul <= hw->size_emul); 1490 1491 hw->pending_emul += size; 1492 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul; 1493 1494 return size; 1495 } 1496 1497 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) 1498 { 1499 size_t total = 0; 1500 1501 if (hw->pcm_ops->buffer_get_free) { 1502 size_t free = hw->pcm_ops->buffer_get_free(hw); 1503 1504 size = MIN(size, free); 1505 } 1506 1507 while (total < size) { 1508 size_t dst_size = size - total; 1509 size_t copy_size, proc; 1510 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); 1511 1512 if (dst_size == 0) { 1513 break; 1514 } 1515 1516 copy_size = MIN(size - total, dst_size); 1517 if (dst) { 1518 memcpy(dst, (char *)buf + total, copy_size); 1519 } 1520 proc = hw->pcm_ops->put_buffer_out(hw, dst, copy_size); 1521 total += proc; 1522 1523 if (proc == 0 || proc < copy_size) { 1524 break; 1525 } 1526 } 1527 1528 return total; 1529 } 1530 1531 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) 1532 { 1533 size_t total = 0; 1534 1535 if (hw->pcm_ops->run_buffer_in) { 1536 hw->pcm_ops->run_buffer_in(hw); 1537 } 1538 1539 while (total < size) { 1540 size_t src_size = size - total; 1541 void *src = hw->pcm_ops->get_buffer_in(hw, &src_size); 1542 1543 if (src_size == 0) { 1544 break; 1545 } 1546 1547 memcpy((char *)buf + total, src, src_size); 1548 hw->pcm_ops->put_buffer_in(hw, src, src_size); 1549 total += src_size; 1550 } 1551 1552 return total; 1553 } 1554 1555 static int audio_driver_init(AudioState *s, struct audio_driver *drv, 1556 bool msg, Audiodev *dev) 1557 { 1558 s->drv_opaque = drv->init(dev); 1559 1560 if (s->drv_opaque) { 1561 if (!drv->pcm_ops->get_buffer_in) { 1562 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in; 1563 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in; 1564 } 1565 if (!drv->pcm_ops->get_buffer_out) { 1566 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out; 1567 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out; 1568 } 1569 1570 audio_init_nb_voices_out(s, drv); 1571 audio_init_nb_voices_in(s, drv); 1572 s->drv = drv; 1573 return 0; 1574 } else { 1575 if (msg) { 1576 dolog("Could not init `%s' audio driver\n", drv->name); 1577 } 1578 return -1; 1579 } 1580 } 1581 1582 static void audio_vm_change_state_handler (void *opaque, bool running, 1583 RunState state) 1584 { 1585 AudioState *s = opaque; 1586 HWVoiceOut *hwo = NULL; 1587 HWVoiceIn *hwi = NULL; 1588 1589 s->vm_running = running; 1590 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) { 1591 if (hwo->pcm_ops->enable_out) { 1592 hwo->pcm_ops->enable_out(hwo, running); 1593 } 1594 } 1595 1596 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) { 1597 if (hwi->pcm_ops->enable_in) { 1598 hwi->pcm_ops->enable_in(hwi, running); 1599 } 1600 } 1601 audio_reset_timer (s); 1602 } 1603 1604 static void free_audio_state(AudioState *s) 1605 { 1606 HWVoiceOut *hwo, *hwon; 1607 HWVoiceIn *hwi, *hwin; 1608 1609 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { 1610 SWVoiceCap *sc; 1611 1612 if (hwo->enabled && hwo->pcm_ops->enable_out) { 1613 hwo->pcm_ops->enable_out(hwo, false); 1614 } 1615 hwo->pcm_ops->fini_out (hwo); 1616 1617 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) { 1618 CaptureVoiceOut *cap = sc->cap; 1619 struct capture_callback *cb; 1620 1621 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1622 cb->ops.destroy (cb->opaque); 1623 } 1624 } 1625 QLIST_REMOVE(hwo, entries); 1626 } 1627 1628 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) { 1629 if (hwi->enabled && hwi->pcm_ops->enable_in) { 1630 hwi->pcm_ops->enable_in(hwi, false); 1631 } 1632 hwi->pcm_ops->fini_in (hwi); 1633 QLIST_REMOVE(hwi, entries); 1634 } 1635 1636 if (s->drv) { 1637 s->drv->fini (s->drv_opaque); 1638 s->drv = NULL; 1639 } 1640 1641 if (s->dev) { 1642 qapi_free_Audiodev(s->dev); 1643 s->dev = NULL; 1644 } 1645 1646 if (s->ts) { 1647 timer_free(s->ts); 1648 s->ts = NULL; 1649 } 1650 1651 g_free(s); 1652 } 1653 1654 void audio_cleanup(void) 1655 { 1656 while (!QTAILQ_EMPTY(&audio_states)) { 1657 AudioState *s = QTAILQ_FIRST(&audio_states); 1658 QTAILQ_REMOVE(&audio_states, s, list); 1659 free_audio_state(s); 1660 } 1661 } 1662 1663 static bool vmstate_audio_needed(void *opaque) 1664 { 1665 /* 1666 * Never needed, this vmstate only exists in case 1667 * an old qemu sends it to us. 1668 */ 1669 return false; 1670 } 1671 1672 static const VMStateDescription vmstate_audio = { 1673 .name = "audio", 1674 .version_id = 1, 1675 .minimum_version_id = 1, 1676 .needed = vmstate_audio_needed, 1677 .fields = (VMStateField[]) { 1678 VMSTATE_END_OF_LIST() 1679 } 1680 }; 1681 1682 static void audio_validate_opts(Audiodev *dev, Error **errp); 1683 1684 static AudiodevListEntry *audiodev_find( 1685 AudiodevListHead *head, const char *drvname) 1686 { 1687 AudiodevListEntry *e; 1688 QSIMPLEQ_FOREACH(e, head, next) { 1689 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) { 1690 return e; 1691 } 1692 } 1693 1694 return NULL; 1695 } 1696 1697 /* 1698 * if we have dev, this function was called because of an -audiodev argument => 1699 * initialize a new state with it 1700 * if dev == NULL => legacy implicit initialization, return the already created 1701 * state or create a new one 1702 */ 1703 static AudioState *audio_init(Audiodev *dev, const char *name) 1704 { 1705 static bool atexit_registered; 1706 size_t i; 1707 int done = 0; 1708 const char *drvname = NULL; 1709 VMChangeStateEntry *vmse; 1710 AudioState *s; 1711 struct audio_driver *driver; 1712 /* silence gcc warning about uninitialized variable */ 1713 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); 1714 1715 if (using_spice) { 1716 /* 1717 * When using spice allow the spice audio driver being picked 1718 * as default. 1719 * 1720 * Temporary hack. Using audio devices without explicit 1721 * audiodev= property is already deprecated. Same goes for 1722 * the -soundhw switch. Once this support gets finally 1723 * removed we can also drop the concept of a default audio 1724 * backend and this can go away. 1725 */ 1726 driver = audio_driver_lookup("spice"); 1727 if (driver) { 1728 driver->can_be_default = 1; 1729 } 1730 } 1731 1732 if (dev) { 1733 /* -audiodev option */ 1734 legacy_config = false; 1735 drvname = AudiodevDriver_str(dev->driver); 1736 } else if (!QTAILQ_EMPTY(&audio_states)) { 1737 if (!legacy_config) { 1738 dolog("Device %s: audiodev default parameter is deprecated, please " 1739 "specify audiodev=%s\n", name, 1740 QTAILQ_FIRST(&audio_states)->dev->id); 1741 } 1742 return QTAILQ_FIRST(&audio_states); 1743 } else { 1744 /* legacy implicit initialization */ 1745 head = audio_handle_legacy_opts(); 1746 /* 1747 * In case of legacy initialization, all Audiodevs in the list will have 1748 * the same configuration (except the driver), so it doesn't matter which 1749 * one we chose. We need an Audiodev to set up AudioState before we can 1750 * init a driver. Also note that dev at this point is still in the 1751 * list. 1752 */ 1753 dev = QSIMPLEQ_FIRST(&head)->dev; 1754 audio_validate_opts(dev, &error_abort); 1755 } 1756 1757 s = g_new0(AudioState, 1); 1758 s->dev = dev; 1759 1760 QLIST_INIT (&s->hw_head_out); 1761 QLIST_INIT (&s->hw_head_in); 1762 QLIST_INIT (&s->cap_head); 1763 if (!atexit_registered) { 1764 atexit(audio_cleanup); 1765 atexit_registered = true; 1766 } 1767 1768 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); 1769 1770 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices; 1771 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices; 1772 1773 if (s->nb_hw_voices_out < 1) { 1774 dolog ("Bogus number of playback voices %d, setting to 1\n", 1775 s->nb_hw_voices_out); 1776 s->nb_hw_voices_out = 1; 1777 } 1778 1779 if (s->nb_hw_voices_in < 0) { 1780 dolog ("Bogus number of capture voices %d, setting to 0\n", 1781 s->nb_hw_voices_in); 1782 s->nb_hw_voices_in = 0; 1783 } 1784 1785 if (drvname) { 1786 driver = audio_driver_lookup(drvname); 1787 if (driver) { 1788 done = !audio_driver_init(s, driver, true, dev); 1789 } else { 1790 dolog ("Unknown audio driver `%s'\n", drvname); 1791 } 1792 if (!done) { 1793 free_audio_state(s); 1794 return NULL; 1795 } 1796 } else { 1797 for (i = 0; audio_prio_list[i]; i++) { 1798 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]); 1799 driver = audio_driver_lookup(audio_prio_list[i]); 1800 1801 if (e && driver) { 1802 s->dev = dev = e->dev; 1803 audio_validate_opts(dev, &error_abort); 1804 done = !audio_driver_init(s, driver, false, dev); 1805 if (done) { 1806 e->dev = NULL; 1807 break; 1808 } 1809 } 1810 } 1811 } 1812 audio_free_audiodev_list(&head); 1813 1814 if (!done) { 1815 driver = audio_driver_lookup("none"); 1816 done = !audio_driver_init(s, driver, false, dev); 1817 assert(done); 1818 dolog("warning: Using timer based audio emulation\n"); 1819 } 1820 1821 if (dev->timer_period <= 0) { 1822 s->period_ticks = 1; 1823 } else { 1824 s->period_ticks = dev->timer_period * (int64_t)SCALE_US; 1825 } 1826 1827 vmse = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); 1828 if (!vmse) { 1829 dolog ("warning: Could not register change state handler\n" 1830 "(Audio can continue looping even after stopping the VM)\n"); 1831 } 1832 1833 QTAILQ_INSERT_TAIL(&audio_states, s, list); 1834 QLIST_INIT (&s->card_head); 1835 vmstate_register (NULL, 0, &vmstate_audio, s); 1836 return s; 1837 } 1838 1839 void audio_free_audiodev_list(AudiodevListHead *head) 1840 { 1841 AudiodevListEntry *e; 1842 while ((e = QSIMPLEQ_FIRST(head))) { 1843 QSIMPLEQ_REMOVE_HEAD(head, next); 1844 qapi_free_Audiodev(e->dev); 1845 g_free(e); 1846 } 1847 } 1848 1849 void AUD_register_card (const char *name, QEMUSoundCard *card) 1850 { 1851 if (!card->state) { 1852 card->state = audio_init(NULL, name); 1853 } 1854 1855 card->name = g_strdup (name); 1856 memset (&card->entries, 0, sizeof (card->entries)); 1857 QLIST_INSERT_HEAD(&card->state->card_head, card, entries); 1858 } 1859 1860 void AUD_remove_card (QEMUSoundCard *card) 1861 { 1862 QLIST_REMOVE (card, entries); 1863 g_free (card->name); 1864 } 1865 1866 static struct audio_pcm_ops capture_pcm_ops; 1867 1868 CaptureVoiceOut *AUD_add_capture( 1869 AudioState *s, 1870 struct audsettings *as, 1871 struct audio_capture_ops *ops, 1872 void *cb_opaque 1873 ) 1874 { 1875 CaptureVoiceOut *cap; 1876 struct capture_callback *cb; 1877 1878 if (!s) { 1879 if (!legacy_config) { 1880 dolog("Capturing without setting an audiodev is deprecated\n"); 1881 } 1882 s = audio_init(NULL, NULL); 1883 } 1884 1885 if (!audio_get_pdo_out(s->dev)->mixing_engine) { 1886 dolog("Can't capture with mixeng disabled\n"); 1887 return NULL; 1888 } 1889 1890 if (audio_validate_settings (as)) { 1891 dolog ("Invalid settings were passed when trying to add capture\n"); 1892 audio_print_settings (as); 1893 return NULL; 1894 } 1895 1896 cb = g_malloc0(sizeof(*cb)); 1897 cb->ops = *ops; 1898 cb->opaque = cb_opaque; 1899 1900 cap = audio_pcm_capture_find_specific(s, as); 1901 if (cap) { 1902 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1903 } else { 1904 HWVoiceOut *hw; 1905 1906 cap = g_malloc0(sizeof(*cap)); 1907 1908 hw = &cap->hw; 1909 hw->s = s; 1910 hw->pcm_ops = &capture_pcm_ops; 1911 QLIST_INIT (&hw->sw_head); 1912 QLIST_INIT (&cap->cb_head); 1913 1914 /* XXX find a more elegant way */ 1915 hw->samples = 4096 * 4; 1916 audio_pcm_hw_alloc_resources_out(hw); 1917 1918 audio_pcm_init_info (&hw->info, as); 1919 1920 cap->buf = g_malloc0_n(hw->mix_buf.size, hw->info.bytes_per_frame); 1921 1922 if (hw->info.is_float) { 1923 hw->clip = mixeng_clip_float[hw->info.nchannels == 2]; 1924 } else { 1925 hw->clip = mixeng_clip 1926 [hw->info.nchannels == 2] 1927 [hw->info.is_signed] 1928 [hw->info.swap_endianness] 1929 [audio_bits_to_index(hw->info.bits)]; 1930 } 1931 1932 QLIST_INSERT_HEAD (&s->cap_head, cap, entries); 1933 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries); 1934 1935 QLIST_FOREACH(hw, &s->hw_head_out, entries) { 1936 audio_attach_capture (hw); 1937 } 1938 } 1939 1940 return cap; 1941 } 1942 1943 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque) 1944 { 1945 struct capture_callback *cb; 1946 1947 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) { 1948 if (cb->opaque == cb_opaque) { 1949 cb->ops.destroy (cb_opaque); 1950 QLIST_REMOVE (cb, entries); 1951 g_free (cb); 1952 1953 if (!cap->cb_head.lh_first) { 1954 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1; 1955 1956 while (sw) { 1957 SWVoiceCap *sc = (SWVoiceCap *) sw; 1958 #ifdef DEBUG_CAPTURE 1959 dolog ("freeing %s\n", sw->name); 1960 #endif 1961 1962 sw1 = sw->entries.le_next; 1963 if (sw->rate) { 1964 st_rate_stop (sw->rate); 1965 sw->rate = NULL; 1966 } 1967 QLIST_REMOVE (sw, entries); 1968 QLIST_REMOVE (sc, entries); 1969 g_free (sc); 1970 sw = sw1; 1971 } 1972 QLIST_REMOVE (cap, entries); 1973 g_free(cap->hw.mix_buf.buffer); 1974 g_free (cap->buf); 1975 g_free (cap); 1976 } 1977 return; 1978 } 1979 } 1980 } 1981 1982 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol) 1983 { 1984 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 1985 audio_set_volume_out(sw, &vol); 1986 } 1987 1988 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol) 1989 { 1990 if (sw) { 1991 HWVoiceOut *hw = sw->hw; 1992 1993 sw->vol.mute = vol->mute; 1994 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 1995 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] / 1996 255; 1997 1998 if (hw->pcm_ops->volume_out) { 1999 hw->pcm_ops->volume_out(hw, vol); 2000 } 2001 } 2002 } 2003 2004 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol) 2005 { 2006 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } }; 2007 audio_set_volume_in(sw, &vol); 2008 } 2009 2010 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol) 2011 { 2012 if (sw) { 2013 HWVoiceIn *hw = sw->hw; 2014 2015 sw->vol.mute = vol->mute; 2016 sw->vol.l = nominal_volume.l * vol->vol[0] / 255; 2017 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] / 2018 255; 2019 2020 if (hw->pcm_ops->volume_in) { 2021 hw->pcm_ops->volume_in(hw, vol); 2022 } 2023 } 2024 } 2025 2026 void audio_create_pdos(Audiodev *dev) 2027 { 2028 switch (dev->driver) { 2029 #define CASE(DRIVER, driver, pdo_name) \ 2030 case AUDIODEV_DRIVER_##DRIVER: \ 2031 if (!dev->u.driver.in) { \ 2032 dev->u.driver.in = g_malloc0( \ 2033 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 2034 } \ 2035 if (!dev->u.driver.out) { \ 2036 dev->u.driver.out = g_malloc0( \ 2037 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \ 2038 } \ 2039 break 2040 2041 CASE(NONE, none, ); 2042 #ifdef CONFIG_AUDIO_ALSA 2043 CASE(ALSA, alsa, Alsa); 2044 #endif 2045 #ifdef CONFIG_AUDIO_COREAUDIO 2046 CASE(COREAUDIO, coreaudio, Coreaudio); 2047 #endif 2048 #ifdef CONFIG_DBUS_DISPLAY 2049 CASE(DBUS, dbus, ); 2050 #endif 2051 #ifdef CONFIG_AUDIO_DSOUND 2052 CASE(DSOUND, dsound, ); 2053 #endif 2054 #ifdef CONFIG_AUDIO_JACK 2055 CASE(JACK, jack, Jack); 2056 #endif 2057 #ifdef CONFIG_AUDIO_OSS 2058 CASE(OSS, oss, Oss); 2059 #endif 2060 #ifdef CONFIG_AUDIO_PA 2061 CASE(PA, pa, Pa); 2062 #endif 2063 #ifdef CONFIG_AUDIO_PIPEWIRE 2064 CASE(PIPEWIRE, pipewire, Pipewire); 2065 #endif 2066 #ifdef CONFIG_AUDIO_SDL 2067 CASE(SDL, sdl, Sdl); 2068 #endif 2069 #ifdef CONFIG_AUDIO_SNDIO 2070 CASE(SNDIO, sndio, ); 2071 #endif 2072 #ifdef CONFIG_SPICE 2073 CASE(SPICE, spice, ); 2074 #endif 2075 CASE(WAV, wav, ); 2076 2077 case AUDIODEV_DRIVER__MAX: 2078 abort(); 2079 }; 2080 } 2081 2082 static void audio_validate_per_direction_opts( 2083 AudiodevPerDirectionOptions *pdo, Error **errp) 2084 { 2085 if (!pdo->has_mixing_engine) { 2086 pdo->has_mixing_engine = true; 2087 pdo->mixing_engine = true; 2088 } 2089 if (!pdo->has_fixed_settings) { 2090 pdo->has_fixed_settings = true; 2091 pdo->fixed_settings = pdo->mixing_engine; 2092 } 2093 if (!pdo->fixed_settings && 2094 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) { 2095 error_setg(errp, 2096 "You can't use frequency, channels or format with fixed-settings=off"); 2097 return; 2098 } 2099 if (!pdo->mixing_engine && pdo->fixed_settings) { 2100 error_setg(errp, "You can't use fixed-settings without mixeng"); 2101 return; 2102 } 2103 2104 if (!pdo->has_frequency) { 2105 pdo->has_frequency = true; 2106 pdo->frequency = 44100; 2107 } 2108 if (!pdo->has_channels) { 2109 pdo->has_channels = true; 2110 pdo->channels = 2; 2111 } 2112 if (!pdo->has_voices) { 2113 pdo->has_voices = true; 2114 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX; 2115 } 2116 if (!pdo->has_format) { 2117 pdo->has_format = true; 2118 pdo->format = AUDIO_FORMAT_S16; 2119 } 2120 } 2121 2122 static void audio_validate_opts(Audiodev *dev, Error **errp) 2123 { 2124 Error *err = NULL; 2125 2126 audio_create_pdos(dev); 2127 2128 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err); 2129 if (err) { 2130 error_propagate(errp, err); 2131 return; 2132 } 2133 2134 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err); 2135 if (err) { 2136 error_propagate(errp, err); 2137 return; 2138 } 2139 2140 if (!dev->has_timer_period) { 2141 dev->has_timer_period = true; 2142 dev->timer_period = 10000; /* 100Hz -> 10ms */ 2143 } 2144 } 2145 2146 void audio_help(void) 2147 { 2148 int i; 2149 2150 printf("Available audio drivers:\n"); 2151 2152 for (i = 0; i < AUDIODEV_DRIVER__MAX; i++) { 2153 audio_driver *driver = audio_driver_lookup(AudiodevDriver_str(i)); 2154 if (driver) { 2155 printf("%s\n", driver->name); 2156 } 2157 } 2158 } 2159 2160 void audio_parse_option(const char *opt) 2161 { 2162 Audiodev *dev = NULL; 2163 2164 if (is_help_option(opt)) { 2165 audio_help(); 2166 exit(EXIT_SUCCESS); 2167 } 2168 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal); 2169 visit_type_Audiodev(v, NULL, &dev, &error_fatal); 2170 visit_free(v); 2171 2172 audio_define(dev); 2173 } 2174 2175 void audio_define(Audiodev *dev) 2176 { 2177 AudiodevListEntry *e; 2178 2179 audio_validate_opts(dev, &error_fatal); 2180 2181 e = g_new0(AudiodevListEntry, 1); 2182 e->dev = dev; 2183 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next); 2184 } 2185 2186 bool audio_init_audiodevs(void) 2187 { 2188 AudiodevListEntry *e; 2189 2190 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2191 if (!audio_init(e->dev, NULL)) { 2192 return false; 2193 } 2194 } 2195 2196 return true; 2197 } 2198 2199 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo) 2200 { 2201 return (audsettings) { 2202 .freq = pdo->frequency, 2203 .nchannels = pdo->channels, 2204 .fmt = pdo->format, 2205 .endianness = AUDIO_HOST_ENDIANNESS, 2206 }; 2207 } 2208 2209 int audioformat_bytes_per_sample(AudioFormat fmt) 2210 { 2211 switch (fmt) { 2212 case AUDIO_FORMAT_U8: 2213 case AUDIO_FORMAT_S8: 2214 return 1; 2215 2216 case AUDIO_FORMAT_U16: 2217 case AUDIO_FORMAT_S16: 2218 return 2; 2219 2220 case AUDIO_FORMAT_U32: 2221 case AUDIO_FORMAT_S32: 2222 case AUDIO_FORMAT_F32: 2223 return 4; 2224 2225 case AUDIO_FORMAT__MAX: 2226 ; 2227 } 2228 abort(); 2229 } 2230 2231 2232 /* frames = freq * usec / 1e6 */ 2233 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo, 2234 audsettings *as, int def_usecs) 2235 { 2236 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs; 2237 return (as->freq * usecs + 500000) / 1000000; 2238 } 2239 2240 /* samples = channels * frames = channels * freq * usec / 1e6 */ 2241 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo, 2242 audsettings *as, int def_usecs) 2243 { 2244 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs); 2245 } 2246 2247 /* 2248 * bytes = bytes_per_sample * samples = 2249 * bytes_per_sample * channels * freq * usec / 1e6 2250 */ 2251 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, 2252 audsettings *as, int def_usecs) 2253 { 2254 return audio_buffer_samples(pdo, as, def_usecs) * 2255 audioformat_bytes_per_sample(as->fmt); 2256 } 2257 2258 AudioState *audio_state_by_name(const char *name) 2259 { 2260 AudioState *s; 2261 QTAILQ_FOREACH(s, &audio_states, list) { 2262 assert(s->dev); 2263 if (strcmp(name, s->dev->id) == 0) { 2264 return s; 2265 } 2266 } 2267 return NULL; 2268 } 2269 2270 const char *audio_get_id(QEMUSoundCard *card) 2271 { 2272 if (card->state) { 2273 assert(card->state->dev); 2274 return card->state->dev->id; 2275 } else { 2276 return ""; 2277 } 2278 } 2279 2280 const char *audio_application_name(void) 2281 { 2282 const char *vm_name; 2283 2284 vm_name = qemu_get_vm_name(); 2285 return vm_name ? vm_name : "qemu"; 2286 } 2287 2288 void audio_rate_start(RateCtl *rate) 2289 { 2290 memset(rate, 0, sizeof(RateCtl)); 2291 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2292 } 2293 2294 size_t audio_rate_peek_bytes(RateCtl *rate, struct audio_pcm_info *info) 2295 { 2296 int64_t now; 2297 int64_t ticks; 2298 int64_t bytes; 2299 int64_t frames; 2300 2301 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 2302 ticks = now - rate->start_ticks; 2303 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND); 2304 frames = (bytes - rate->bytes_sent) / info->bytes_per_frame; 2305 if (frames < 0 || frames > 65536) { 2306 AUD_log(NULL, "Resetting rate control (%" PRId64 " frames)\n", frames); 2307 audio_rate_start(rate); 2308 frames = 0; 2309 } 2310 2311 return frames * info->bytes_per_frame; 2312 } 2313 2314 void audio_rate_add_bytes(RateCtl *rate, size_t bytes_used) 2315 { 2316 rate->bytes_sent += bytes_used; 2317 } 2318 2319 size_t audio_rate_get_bytes(RateCtl *rate, struct audio_pcm_info *info, 2320 size_t bytes_avail) 2321 { 2322 size_t bytes; 2323 2324 bytes = audio_rate_peek_bytes(rate, info); 2325 bytes = MIN(bytes, bytes_avail); 2326 audio_rate_add_bytes(rate, bytes); 2327 2328 return bytes; 2329 } 2330 2331 AudiodevList *qmp_query_audiodevs(Error **errp) 2332 { 2333 AudiodevList *ret = NULL; 2334 AudiodevListEntry *e; 2335 QSIMPLEQ_FOREACH(e, &audiodevs, next) { 2336 QAPI_LIST_PREPEND(ret, QAPI_CLONE(Audiodev, e->dev)); 2337 } 2338 return ret; 2339 } 2340