audio/audio.c

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