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 /**
 990  * audio_frontend_frames_in() - returns the number of frames the resampling
 991  * code generates from frames_in frames
 992  *
 993  * @sw: audio recording frontend
 994  * @frames_in: number of frames
 995  */
 996 static size_t audio_frontend_frames_in(SWVoiceIn *sw, size_t frames_in)
 997 {
 998     return (int64_t)frames_in * sw->ratio >> 32;
 999 }
1000
1001 static size_t audio_get_avail (SWVoiceIn *sw)
1002 {
1003     size_t live;
1004
1005     if (!sw) {
1006         return 0;
1007     }
1008
1009     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1010     if (audio_bug(__func__, live > sw->hw->conv_buf->size)) {
1011         dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live,
1012               sw->hw->conv_buf->size);
1013         return 0;
1014     }
1015
1016     ldebug (
1017         "%s: get_avail live %zu frontend frames %zu\n",
1018         SW_NAME (sw),
1019         live, audio_frontend_frames_in(sw, live)
1020         );
1021
1022     return live;
1023 }
1024
1025 /**
1026  * audio_frontend_frames_out() - returns the number of frames needed to
1027  * get frames_out frames after resampling
1028  *
1029  * @sw: audio playback frontend
1030  * @frames_out: number of frames
1031  */
1032 static size_t audio_frontend_frames_out(SWVoiceOut *sw, size_t frames_out)
1033 {
1034     return ((int64_t)frames_out << 32) / sw->ratio;
1035 }
1036
1037 static size_t audio_get_free(SWVoiceOut *sw)
1038 {
1039     size_t live, dead;
1040
1041     if (!sw) {
1042         return 0;
1043     }
1044
1045     live = sw->total_hw_samples_mixed;
1046
1047     if (audio_bug(__func__, live > sw->hw->mix_buf->size)) {
1048         dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live,
1049               sw->hw->mix_buf->size);
1050         return 0;
1051     }
1052
1053     dead = sw->hw->mix_buf->size - live;
1054
1055 #ifdef DEBUG_OUT
1056     dolog("%s: get_free live %zu dead %zu frontend frames %zu\n",
1057           SW_NAME(sw), live, dead, audio_frontend_frames_out(sw, dead));
1058 #endif
1059
1060     return dead;
1061 }
1062
1063 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos,
1064                                         size_t samples)
1065 {
1066     size_t n;
1067
1068     if (hw->enabled) {
1069         SWVoiceCap *sc;
1070
1071         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1072             SWVoiceOut *sw = &sc->sw;
1073             int rpos2 = rpos;
1074
1075             n = samples;
1076             while (n) {
1077                 size_t till_end_of_hw = hw->mix_buf->size - rpos2;
1078                 size_t to_write = MIN(till_end_of_hw, n);
1079                 size_t bytes = to_write * hw->info.bytes_per_frame;
1080                 size_t written;
1081
1082                 sw->buf = hw->mix_buf->samples + rpos2;
1083                 written = audio_pcm_sw_write (sw, NULL, bytes);
1084                 if (written - bytes) {
1085                     dolog("Could not mix %zu bytes into a capture "
1086                           "buffer, mixed %zu\n",
1087                           bytes, written);
1088                     break;
1089                 }
1090                 n -= to_write;
1091                 rpos2 = (rpos2 + to_write) % hw->mix_buf->size;
1092             }
1093         }
1094     }
1095
1096     n = MIN(samples, hw->mix_buf->size - rpos);
1097     mixeng_clear(hw->mix_buf->samples + rpos, n);
1098     mixeng_clear(hw->mix_buf->samples, samples - n);
1099 }
1100
1101 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live)
1102 {
1103     size_t clipped = 0;
1104
1105     while (live) {
1106         size_t size = live * hw->info.bytes_per_frame;
1107         size_t decr, proc;
1108         void *buf = hw->pcm_ops->get_buffer_out(hw, &size);
1109
1110         if (size == 0) {
1111             break;
1112         }
1113
1114         decr = MIN(size / hw->info.bytes_per_frame, live);
1115         if (buf) {
1116             audio_pcm_hw_clip_out(hw, buf, decr);
1117         }
1118         proc = hw->pcm_ops->put_buffer_out(hw, buf,
1119                                            decr * hw->info.bytes_per_frame) /
1120             hw->info.bytes_per_frame;
1121
1122         live -= proc;
1123         clipped += proc;
1124         hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size;
1125
1126         if (proc == 0 || proc < decr) {
1127             break;
1128         }
1129     }
1130
1131     if (hw->pcm_ops->run_buffer_out) {
1132         hw->pcm_ops->run_buffer_out(hw);
1133     }
1134
1135     return clipped;
1136 }
1137
1138 static void audio_run_out (AudioState *s)
1139 {
1140     HWVoiceOut *hw = NULL;
1141     SWVoiceOut *sw;
1142
1143     while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1144         size_t played, live, prev_rpos;
1145         size_t hw_free = audio_pcm_hw_get_free(hw);
1146         int nb_live;
1147
1148         if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1149             /* there is exactly 1 sw for each hw with no mixeng */
1150             sw = hw->sw_head.lh_first;
1151
1152             if (hw->pending_disable) {
1153                 hw->enabled = 0;
1154                 hw->pending_disable = 0;
1155                 if (hw->pcm_ops->enable_out) {
1156                     hw->pcm_ops->enable_out(hw, false);
1157                 }
1158             }
1159
1160             if (sw->active) {
1161                 sw->callback.fn(sw->callback.opaque,
1162                                 hw_free * sw->info.bytes_per_frame);
1163             }
1164
1165             if (hw->pcm_ops->run_buffer_out) {
1166                 hw->pcm_ops->run_buffer_out(hw);
1167             }
1168
1169             continue;
1170         }
1171
1172         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1173             if (sw->active) {
1174                 size_t sw_free = audio_get_free(sw);
1175                 size_t free;
1176
1177                 if (hw_free > sw->total_hw_samples_mixed) {
1178                     free = audio_frontend_frames_out(sw,
1179                         MIN(sw_free, hw_free - sw->total_hw_samples_mixed));
1180                 } else {
1181                     free = 0;
1182                 }
1183                 if (free > 0) {
1184                     sw->callback.fn(sw->callback.opaque,
1185                                     free * sw->info.bytes_per_frame);
1186                 }
1187             }
1188         }
1189
1190         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1191         if (!nb_live) {
1192             live = 0;
1193         }
1194
1195         if (audio_bug(__func__, live > hw->mix_buf->size)) {
1196             dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
1197             continue;
1198         }
1199
1200         if (hw->pending_disable && !nb_live) {
1201             SWVoiceCap *sc;
1202 #ifdef DEBUG_OUT
1203             dolog ("Disabling voice\n");
1204 #endif
1205             hw->enabled = 0;
1206             hw->pending_disable = 0;
1207             if (hw->pcm_ops->enable_out) {
1208                 hw->pcm_ops->enable_out(hw, false);
1209             }
1210             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1211                 sc->sw.active = 0;
1212                 audio_recalc_and_notify_capture (sc->cap);
1213             }
1214             continue;
1215         }
1216
1217         if (!live) {
1218             if (hw->pcm_ops->run_buffer_out) {
1219                 hw->pcm_ops->run_buffer_out(hw);
1220             }
1221             continue;
1222         }
1223
1224         prev_rpos = hw->mix_buf->pos;
1225         played = audio_pcm_hw_run_out(hw, live);
1226         replay_audio_out(&played);
1227         if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) {
1228             dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n",
1229                   hw->mix_buf->pos, hw->mix_buf->size, played);
1230             hw->mix_buf->pos = 0;
1231         }
1232
1233 #ifdef DEBUG_OUT
1234         dolog("played=%zu\n", played);
1235 #endif
1236
1237         if (played) {
1238             hw->ts_helper += played;
1239             audio_capture_mix_and_clear (hw, prev_rpos, played);
1240         }
1241
1242         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1243             if (!sw->active && sw->empty) {
1244                 continue;
1245             }
1246
1247             if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1248                 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n",
1249                       played, sw->total_hw_samples_mixed);
1250                 played = sw->total_hw_samples_mixed;
1251             }
1252
1253             sw->total_hw_samples_mixed -= played;
1254
1255             if (!sw->total_hw_samples_mixed) {
1256                 sw->empty = 1;
1257             }
1258         }
1259     }
1260 }
1261
1262 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples)
1263 {
1264     size_t conv = 0;
1265
1266     if (hw->pcm_ops->run_buffer_in) {
1267         hw->pcm_ops->run_buffer_in(hw);
1268     }
1269
1270     while (samples) {
1271         size_t proc;
1272         size_t size = samples * hw->info.bytes_per_frame;
1273         void *buf = hw->pcm_ops->get_buffer_in(hw, &size);
1274
1275         assert(size % hw->info.bytes_per_frame == 0);
1276         if (size == 0) {
1277             break;
1278         }
1279
1280         proc = audio_pcm_hw_conv_in(hw, buf, size / hw->info.bytes_per_frame);
1281
1282         samples -= proc;
1283         conv += proc;
1284         hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame);
1285     }
1286
1287     return conv;
1288 }
1289
1290 static void audio_run_in (AudioState *s)
1291 {
1292     HWVoiceIn *hw = NULL;
1293
1294     if (!audio_get_pdo_in(s->dev)->mixing_engine) {
1295         while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1296             /* there is exactly 1 sw for each hw with no mixeng */
1297             SWVoiceIn *sw = hw->sw_head.lh_first;
1298             if (sw->active) {
1299                 sw->callback.fn(sw->callback.opaque, INT_MAX);
1300             }
1301         }
1302         return;
1303     }
1304
1305     while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1306         SWVoiceIn *sw;
1307         size_t captured = 0, min;
1308
1309         if (replay_mode != REPLAY_MODE_PLAY) {
1310             captured = audio_pcm_hw_run_in(
1311                 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw));
1312         }
1313         replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos,
1314                         hw->conv_buf->size);
1315
1316         min = audio_pcm_hw_find_min_in (hw);
1317         hw->total_samples_captured += captured - min;
1318         hw->ts_helper += captured;
1319
1320         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1321             sw->total_hw_samples_acquired -= min;
1322
1323             if (sw->active) {
1324                 size_t sw_avail = audio_get_avail(sw);
1325                 size_t avail;
1326
1327                 avail = audio_frontend_frames_in(sw, sw_avail);
1328                 if (avail > 0) {
1329                     sw->callback.fn(sw->callback.opaque,
1330                                     avail * sw->info.bytes_per_frame);
1331                 }
1332             }
1333         }
1334     }
1335 }
1336
1337 static void audio_run_capture (AudioState *s)
1338 {
1339     CaptureVoiceOut *cap;
1340
1341     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1342         size_t live, rpos, captured;
1343         HWVoiceOut *hw = &cap->hw;
1344         SWVoiceOut *sw;
1345
1346         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1347         rpos = hw->mix_buf->pos;
1348         while (live) {
1349             size_t left = hw->mix_buf->size - rpos;
1350             size_t to_capture = MIN(live, left);
1351             struct st_sample *src;
1352             struct capture_callback *cb;
1353
1354             src = hw->mix_buf->samples + rpos;
1355             hw->clip (cap->buf, src, to_capture);
1356             mixeng_clear (src, to_capture);
1357
1358             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1359                 cb->ops.capture (cb->opaque, cap->buf,
1360                                  to_capture * hw->info.bytes_per_frame);
1361             }
1362             rpos = (rpos + to_capture) % hw->mix_buf->size;
1363             live -= to_capture;
1364         }
1365         hw->mix_buf->pos = rpos;
1366
1367         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1368             if (!sw->active && sw->empty) {
1369                 continue;
1370             }
1371
1372             if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1373                 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n",
1374                       captured, sw->total_hw_samples_mixed);
1375                 captured = sw->total_hw_samples_mixed;
1376             }
1377
1378             sw->total_hw_samples_mixed -= captured;
1379             sw->empty = sw->total_hw_samples_mixed == 0;
1380         }
1381     }
1382 }
1383
1384 void audio_run(AudioState *s, const char *msg)
1385 {
1386     audio_run_out(s);
1387     audio_run_in(s);
1388     audio_run_capture(s);
1389
1390 #ifdef DEBUG_POLL
1391     {
1392         static double prevtime;
1393         double currtime;
1394         struct timeval tv;
1395
1396         if (gettimeofday (&tv, NULL)) {
1397             perror ("audio_run: gettimeofday");
1398             return;
1399         }
1400
1401         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1402         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1403         prevtime = currtime;
1404     }
1405 #endif
1406 }
1407
1408 void audio_generic_run_buffer_in(HWVoiceIn *hw)
1409 {
1410     if (unlikely(!hw->buf_emul)) {
1411         hw->size_emul = hw->samples * hw->info.bytes_per_frame;
1412         hw->buf_emul = g_malloc(hw->size_emul);
1413         hw->pos_emul = hw->pending_emul = 0;
1414     }
1415
1416     while (hw->pending_emul < hw->size_emul) {
1417         size_t read_len = MIN(hw->size_emul - hw->pos_emul,
1418                               hw->size_emul - hw->pending_emul);
1419         size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul,
1420                                         read_len);
1421         hw->pending_emul += read;
1422         hw->pos_emul = (hw->pos_emul + read) % hw->size_emul;
1423         if (read < read_len) {
1424             break;
1425         }
1426     }
1427 }
1428
1429 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
1430 {
1431     size_t start;
1432
1433     start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul);
1434     assert(start < hw->size_emul);
1435
1436     *size = MIN(*size, hw->pending_emul);
1437     *size = MIN(*size, hw->size_emul - start);
1438     return hw->buf_emul + start;
1439 }
1440
1441 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
1442 {
1443     assert(size <= hw->pending_emul);
1444     hw->pending_emul -= size;
1445 }
1446
1447 size_t audio_generic_buffer_get_free(HWVoiceOut *hw)
1448 {
1449     if (hw->buf_emul) {
1450         return hw->size_emul - hw->pending_emul;
1451     } else {
1452         return hw->samples * hw->info.bytes_per_frame;
1453     }
1454 }
1455
1456 void audio_generic_run_buffer_out(HWVoiceOut *hw)
1457 {
1458     while (hw->pending_emul) {
1459         size_t write_len, written, start;
1460
1461         start = audio_ring_posb(hw->pos_emul, hw->pending_emul, hw->size_emul);
1462         assert(start < hw->size_emul);
1463
1464         write_len = MIN(hw->pending_emul, hw->size_emul - start);
1465
1466         written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len);
1467         hw->pending_emul -= written;
1468
1469         if (written < write_len) {
1470             break;
1471         }
1472     }
1473 }
1474
1475 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
1476 {
1477     if (unlikely(!hw->buf_emul)) {
1478         hw->size_emul = hw->samples * hw->info.bytes_per_frame;
1479         hw->buf_emul = g_malloc(hw->size_emul);
1480         hw->pos_emul = hw->pending_emul = 0;
1481     }
1482
1483     *size = MIN(hw->size_emul - hw->pending_emul,
1484                 hw->size_emul - hw->pos_emul);
1485     return hw->buf_emul + hw->pos_emul;
1486 }
1487
1488 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
1489 {
1490     assert(buf == hw->buf_emul + hw->pos_emul &&
1491            size + hw->pending_emul <= hw->size_emul);
1492
1493     hw->pending_emul += size;
1494     hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
1495
1496     return size;
1497 }
1498
1499 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size)
1500 {
1501     size_t total = 0;
1502
1503     if (hw->pcm_ops->buffer_get_free) {
1504         size_t free = hw->pcm_ops->buffer_get_free(hw);
1505
1506         size = MIN(size, free);
1507     }
1508
1509     while (total < size) {
1510         size_t dst_size = size - total;
1511         size_t copy_size, proc;
1512         void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size);
1513
1514         if (dst_size == 0) {
1515             break;
1516         }
1517
1518         copy_size = MIN(size - total, dst_size);
1519         if (dst) {
1520             memcpy(dst, (char *)buf + total, copy_size);
1521         }
1522         proc = hw->pcm_ops->put_buffer_out(hw, dst, copy_size);
1523         total += proc;
1524
1525         if (proc == 0 || proc < copy_size) {
1526             break;
1527         }
1528     }
1529
1530     return total;
1531 }
1532
1533 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size)
1534 {
1535     size_t total = 0;
1536
1537     if (hw->pcm_ops->run_buffer_in) {
1538         hw->pcm_ops->run_buffer_in(hw);
1539     }
1540
1541     while (total < size) {
1542         size_t src_size = size - total;
1543         void *src = hw->pcm_ops->get_buffer_in(hw, &src_size);
1544
1545         if (src_size == 0) {
1546             break;
1547         }
1548
1549         memcpy((char *)buf + total, src, src_size);
1550         hw->pcm_ops->put_buffer_in(hw, src, src_size);
1551         total += src_size;
1552     }
1553
1554     return total;
1555 }
1556
1557 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1558                              bool msg, Audiodev *dev)
1559 {
1560     s->drv_opaque = drv->init(dev);
1561
1562     if (s->drv_opaque) {
1563         if (!drv->pcm_ops->get_buffer_in) {
1564             drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in;
1565             drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in;
1566         }
1567         if (!drv->pcm_ops->get_buffer_out) {
1568             drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out;
1569             drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out;
1570         }
1571
1572         audio_init_nb_voices_out(s, drv);
1573         audio_init_nb_voices_in(s, drv);
1574         s->drv = drv;
1575         return 0;
1576     } else {
1577         if (msg) {
1578             dolog("Could not init `%s' audio driver\n", drv->name);
1579         }
1580         return -1;
1581     }
1582 }
1583
1584 static void audio_vm_change_state_handler (void *opaque, bool running,
1585                                            RunState state)
1586 {
1587     AudioState *s = opaque;
1588     HWVoiceOut *hwo = NULL;
1589     HWVoiceIn *hwi = NULL;
1590
1591     s->vm_running = running;
1592     while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
1593         if (hwo->pcm_ops->enable_out) {
1594             hwo->pcm_ops->enable_out(hwo, running);
1595         }
1596     }
1597
1598     while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
1599         if (hwi->pcm_ops->enable_in) {
1600             hwi->pcm_ops->enable_in(hwi, running);
1601         }
1602     }
1603     audio_reset_timer (s);
1604 }
1605
1606 static void free_audio_state(AudioState *s)
1607 {
1608     HWVoiceOut *hwo, *hwon;
1609     HWVoiceIn *hwi, *hwin;
1610
1611     QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) {
1612         SWVoiceCap *sc;
1613
1614         if (hwo->enabled && hwo->pcm_ops->enable_out) {
1615             hwo->pcm_ops->enable_out(hwo, false);
1616         }
1617         hwo->pcm_ops->fini_out (hwo);
1618
1619         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1620             CaptureVoiceOut *cap = sc->cap;
1621             struct capture_callback *cb;
1622
1623             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1624                 cb->ops.destroy (cb->opaque);
1625             }
1626         }
1627         QLIST_REMOVE(hwo, entries);
1628     }
1629
1630     QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) {
1631         if (hwi->enabled && hwi->pcm_ops->enable_in) {
1632             hwi->pcm_ops->enable_in(hwi, false);
1633         }
1634         hwi->pcm_ops->fini_in (hwi);
1635         QLIST_REMOVE(hwi, entries);
1636     }
1637
1638     if (s->drv) {
1639         s->drv->fini (s->drv_opaque);
1640         s->drv = NULL;
1641     }
1642
1643     if (s->dev) {
1644         qapi_free_Audiodev(s->dev);
1645         s->dev = NULL;
1646     }
1647
1648     if (s->ts) {
1649         timer_free(s->ts);
1650         s->ts = NULL;
1651     }
1652
1653     g_free(s);
1654 }
1655
1656 void audio_cleanup(void)
1657 {
1658     while (!QTAILQ_EMPTY(&audio_states)) {
1659         AudioState *s = QTAILQ_FIRST(&audio_states);
1660         QTAILQ_REMOVE(&audio_states, s, list);
1661         free_audio_state(s);
1662     }
1663 }
1664
1665 static bool vmstate_audio_needed(void *opaque)
1666 {
1667     /*
1668      * Never needed, this vmstate only exists in case
1669      * an old qemu sends it to us.
1670      */
1671     return false;
1672 }
1673
1674 static const VMStateDescription vmstate_audio = {
1675     .name = "audio",
1676     .version_id = 1,
1677     .minimum_version_id = 1,
1678     .needed = vmstate_audio_needed,
1679     .fields = (VMStateField[]) {
1680         VMSTATE_END_OF_LIST()
1681     }
1682 };
1683
1684 static void audio_validate_opts(Audiodev *dev, Error **errp);
1685
1686 static AudiodevListEntry *audiodev_find(
1687     AudiodevListHead *head, const char *drvname)
1688 {
1689     AudiodevListEntry *e;
1690     QSIMPLEQ_FOREACH(e, head, next) {
1691         if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1692             return e;
1693         }
1694     }
1695
1696     return NULL;
1697 }
1698
1699 /*
1700  * if we have dev, this function was called because of an -audiodev argument =>
1701  *   initialize a new state with it
1702  * if dev == NULL => legacy implicit initialization, return the already created
1703  *   state or create a new one
1704  */
1705 static AudioState *audio_init(Audiodev *dev, const char *name)
1706 {
1707     static bool atexit_registered;
1708     size_t i;
1709     int done = 0;
1710     const char *drvname = NULL;
1711     VMChangeStateEntry *e;
1712     AudioState *s;
1713     struct audio_driver *driver;
1714     /* silence gcc warning about uninitialized variable */
1715     AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1716
1717     if (using_spice) {
1718         /*
1719          * When using spice allow the spice audio driver being picked
1720          * as default.
1721          *
1722          * Temporary hack.  Using audio devices without explicit
1723          * audiodev= property is already deprecated.  Same goes for
1724          * the -soundhw switch.  Once this support gets finally
1725          * removed we can also drop the concept of a default audio
1726          * backend and this can go away.
1727          */
1728         driver = audio_driver_lookup("spice");
1729         if (driver) {
1730             driver->can_be_default = 1;
1731         }
1732     }
1733
1734     if (dev) {
1735         /* -audiodev option */
1736         legacy_config = false;
1737         drvname = AudiodevDriver_str(dev->driver);
1738     } else if (!QTAILQ_EMPTY(&audio_states)) {
1739         if (!legacy_config) {
1740             dolog("Device %s: audiodev default parameter is deprecated, please "
1741                   "specify audiodev=%s\n", name,
1742                   QTAILQ_FIRST(&audio_states)->dev->id);
1743         }
1744         return QTAILQ_FIRST(&audio_states);
1745     } else {
1746         /* legacy implicit initialization */
1747         head = audio_handle_legacy_opts();
1748         /*
1749          * In case of legacy initialization, all Audiodevs in the list will have
1750          * the same configuration (except the driver), so it doesn't matter which
1751          * one we chose.  We need an Audiodev to set up AudioState before we can
1752          * init a driver.  Also note that dev at this point is still in the
1753          * list.
1754          */
1755         dev = QSIMPLEQ_FIRST(&head)->dev;
1756         audio_validate_opts(dev, &error_abort);
1757     }
1758
1759     s = g_new0(AudioState, 1);
1760     s->dev = dev;
1761
1762     QLIST_INIT (&s->hw_head_out);
1763     QLIST_INIT (&s->hw_head_in);
1764     QLIST_INIT (&s->cap_head);
1765     if (!atexit_registered) {
1766         atexit(audio_cleanup);
1767         atexit_registered = true;
1768     }
1769
1770     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1771
1772     s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1773     s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1774
1775     if (s->nb_hw_voices_out < 1) {
1776         dolog ("Bogus number of playback voices %d, setting to 1\n",
1777                s->nb_hw_voices_out);
1778         s->nb_hw_voices_out = 1;
1779     }
1780
1781     if (s->nb_hw_voices_in < 0) {
1782         dolog ("Bogus number of capture voices %d, setting to 0\n",
1783                s->nb_hw_voices_in);
1784         s->nb_hw_voices_in = 0;
1785     }
1786
1787     if (drvname) {
1788         driver = audio_driver_lookup(drvname);
1789         if (driver) {
1790             done = !audio_driver_init(s, driver, true, dev);
1791         } else {
1792             dolog ("Unknown audio driver `%s'\n", drvname);
1793         }
1794         if (!done) {
1795             free_audio_state(s);
1796             return NULL;
1797         }
1798     } else {
1799         for (i = 0; audio_prio_list[i]; i++) {
1800             AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1801             driver = audio_driver_lookup(audio_prio_list[i]);
1802
1803             if (e && driver) {
1804                 s->dev = dev = e->dev;
1805                 audio_validate_opts(dev, &error_abort);
1806                 done = !audio_driver_init(s, driver, false, dev);
1807                 if (done) {
1808                     e->dev = NULL;
1809                     break;
1810                 }
1811             }
1812         }
1813     }
1814     audio_free_audiodev_list(&head);
1815
1816     if (!done) {
1817         driver = audio_driver_lookup("none");
1818         done = !audio_driver_init(s, driver, false, dev);
1819         assert(done);
1820         dolog("warning: Using timer based audio emulation\n");
1821     }
1822
1823     if (dev->timer_period <= 0) {
1824         s->period_ticks = 1;
1825     } else {
1826         s->period_ticks = dev->timer_period * (int64_t)SCALE_US;
1827     }
1828
1829     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1830     if (!e) {
1831         dolog ("warning: Could not register change state handler\n"
1832                "(Audio can continue looping even after stopping the VM)\n");
1833     }
1834
1835     QTAILQ_INSERT_TAIL(&audio_states, s, list);
1836     QLIST_INIT (&s->card_head);
1837     vmstate_register (NULL, 0, &vmstate_audio, s);
1838     return s;
1839 }
1840
1841 void audio_free_audiodev_list(AudiodevListHead *head)
1842 {
1843     AudiodevListEntry *e;
1844     while ((e = QSIMPLEQ_FIRST(head))) {
1845         QSIMPLEQ_REMOVE_HEAD(head, next);
1846         qapi_free_Audiodev(e->dev);
1847         g_free(e);
1848     }
1849 }
1850
1851 void AUD_register_card (const char *name, QEMUSoundCard *card)
1852 {
1853     if (!card->state) {
1854         card->state = audio_init(NULL, name);
1855     }
1856
1857     card->name = g_strdup (name);
1858     memset (&card->entries, 0, sizeof (card->entries));
1859     QLIST_INSERT_HEAD(&card->state->card_head, card, entries);
1860 }
1861
1862 void AUD_remove_card (QEMUSoundCard *card)
1863 {
1864     QLIST_REMOVE (card, entries);
1865     g_free (card->name);
1866 }
1867
1868 static struct audio_pcm_ops capture_pcm_ops;
1869
1870 CaptureVoiceOut *AUD_add_capture(
1871     AudioState *s,
1872     struct audsettings *as,
1873     struct audio_capture_ops *ops,
1874     void *cb_opaque
1875     )
1876 {
1877     CaptureVoiceOut *cap;
1878     struct capture_callback *cb;
1879
1880     if (!s) {
1881         if (!legacy_config) {
1882             dolog("Capturing without setting an audiodev is deprecated\n");
1883         }
1884         s = audio_init(NULL, NULL);
1885     }
1886
1887     if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1888         dolog("Can't capture with mixeng disabled\n");
1889         return NULL;
1890     }
1891
1892     if (audio_validate_settings (as)) {
1893         dolog ("Invalid settings were passed when trying to add capture\n");
1894         audio_print_settings (as);
1895         return NULL;
1896     }
1897
1898     cb = g_malloc0(sizeof(*cb));
1899     cb->ops = *ops;
1900     cb->opaque = cb_opaque;
1901
1902     cap = audio_pcm_capture_find_specific(s, as);
1903     if (cap) {
1904         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1905         return cap;
1906     } else {
1907         HWVoiceOut *hw;
1908         CaptureVoiceOut *cap;
1909
1910         cap = g_malloc0(sizeof(*cap));
1911
1912         hw = &cap->hw;
1913         hw->s = s;
1914         hw->pcm_ops = &capture_pcm_ops;
1915         QLIST_INIT (&hw->sw_head);
1916         QLIST_INIT (&cap->cb_head);
1917
1918         /* XXX find a more elegant way */
1919         hw->samples = 4096 * 4;
1920         audio_pcm_hw_alloc_resources_out(hw);
1921
1922         audio_pcm_init_info (&hw->info, as);
1923
1924         cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame);
1925
1926         if (hw->info.is_float) {
1927             hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
1928         } else {
1929             hw->clip = mixeng_clip
1930                 [hw->info.nchannels == 2]
1931                 [hw->info.is_signed]
1932                 [hw->info.swap_endianness]
1933                 [audio_bits_to_index(hw->info.bits)];
1934         }
1935
1936         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1937         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1938
1939         QLIST_FOREACH(hw, &s->hw_head_out, entries) {
1940             audio_attach_capture (hw);
1941         }
1942         return cap;
1943     }
1944 }
1945
1946 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1947 {
1948     struct capture_callback *cb;
1949
1950     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1951         if (cb->opaque == cb_opaque) {
1952             cb->ops.destroy (cb_opaque);
1953             QLIST_REMOVE (cb, entries);
1954             g_free (cb);
1955
1956             if (!cap->cb_head.lh_first) {
1957                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1958
1959                 while (sw) {
1960                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1961 #ifdef DEBUG_CAPTURE
1962                     dolog ("freeing %s\n", sw->name);
1963 #endif
1964
1965                     sw1 = sw->entries.le_next;
1966                     if (sw->rate) {
1967                         st_rate_stop (sw->rate);
1968                         sw->rate = NULL;
1969                     }
1970                     QLIST_REMOVE (sw, entries);
1971                     QLIST_REMOVE (sc, entries);
1972                     g_free (sc);
1973                     sw = sw1;
1974                 }
1975                 QLIST_REMOVE (cap, entries);
1976                 g_free (cap->hw.mix_buf);
1977                 g_free (cap->buf);
1978                 g_free (cap);
1979             }
1980             return;
1981         }
1982     }
1983 }
1984
1985 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1986 {
1987     Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1988     audio_set_volume_out(sw, &vol);
1989 }
1990
1991 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol)
1992 {
1993     if (sw) {
1994         HWVoiceOut *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.l * vol->vol[vol->channels > 1 ? 1 : 0] /
1999             255;
2000
2001         if (hw->pcm_ops->volume_out) {
2002             hw->pcm_ops->volume_out(hw, vol);
2003         }
2004     }
2005 }
2006
2007 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2008 {
2009     Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
2010     audio_set_volume_in(sw, &vol);
2011 }
2012
2013 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol)
2014 {
2015     if (sw) {
2016         HWVoiceIn *hw = sw->hw;
2017
2018         sw->vol.mute = vol->mute;
2019         sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
2020         sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] /
2021             255;
2022
2023         if (hw->pcm_ops->volume_in) {
2024             hw->pcm_ops->volume_in(hw, vol);
2025         }
2026     }
2027 }
2028
2029 void audio_create_pdos(Audiodev *dev)
2030 {
2031     switch (dev->driver) {
2032 #define CASE(DRIVER, driver, pdo_name)                              \
2033     case AUDIODEV_DRIVER_##DRIVER:                                  \
2034         if (!dev->u.driver.has_in) {                                \
2035             dev->u.driver.in = g_malloc0(                           \
2036                 sizeof(Audiodev##pdo_name##PerDirectionOptions));   \
2037             dev->u.driver.has_in = true;                            \
2038         }                                                           \
2039         if (!dev->u.driver.has_out) {                               \
2040             dev->u.driver.out = g_malloc0(                          \
2041                 sizeof(Audiodev##pdo_name##PerDirectionOptions));   \
2042             dev->u.driver.has_out = true;                           \
2043         }                                                           \
2044         break
2045
2046         CASE(NONE, none, );
2047         CASE(ALSA, alsa, Alsa);
2048         CASE(COREAUDIO, coreaudio, Coreaudio);
2049         CASE(DBUS, dbus, );
2050         CASE(DSOUND, dsound, );
2051         CASE(JACK, jack, Jack);
2052         CASE(OSS, oss, Oss);
2053         CASE(PA, pa, Pa);
2054         CASE(SDL, sdl, Sdl);
2055         CASE(SNDIO, sndio, );
2056         CASE(SPICE, spice, );
2057         CASE(WAV, wav, );
2058
2059     case AUDIODEV_DRIVER__MAX:
2060         abort();
2061     };
2062 }
2063
2064 static void audio_validate_per_direction_opts(
2065     AudiodevPerDirectionOptions *pdo, Error **errp)
2066 {
2067     if (!pdo->has_mixing_engine) {
2068         pdo->has_mixing_engine = true;
2069         pdo->mixing_engine = true;
2070     }
2071     if (!pdo->has_fixed_settings) {
2072         pdo->has_fixed_settings = true;
2073         pdo->fixed_settings = pdo->mixing_engine;
2074     }
2075     if (!pdo->fixed_settings &&
2076         (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
2077         error_setg(errp,
2078                    "You can't use frequency, channels or format with fixed-settings=off");
2079         return;
2080     }
2081     if (!pdo->mixing_engine && pdo->fixed_settings) {
2082         error_setg(errp, "You can't use fixed-settings without mixeng");
2083         return;
2084     }
2085
2086     if (!pdo->has_frequency) {
2087         pdo->has_frequency = true;
2088         pdo->frequency = 44100;
2089     }
2090     if (!pdo->has_channels) {
2091         pdo->has_channels = true;
2092         pdo->channels = 2;
2093     }
2094     if (!pdo->has_voices) {
2095         pdo->has_voices = true;
2096         pdo->voices = pdo->mixing_engine ? 1 : INT_MAX;
2097     }
2098     if (!pdo->has_format) {
2099         pdo->has_format = true;
2100         pdo->format = AUDIO_FORMAT_S16;
2101     }
2102 }
2103
2104 static void audio_validate_opts(Audiodev *dev, Error **errp)
2105 {
2106     Error *err = NULL;
2107
2108     audio_create_pdos(dev);
2109
2110     audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
2111     if (err) {
2112         error_propagate(errp, err);
2113         return;
2114     }
2115
2116     audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
2117     if (err) {
2118         error_propagate(errp, err);
2119         return;
2120     }
2121
2122     if (!dev->has_timer_period) {
2123         dev->has_timer_period = true;
2124         dev->timer_period = 10000; /* 100Hz -> 10ms */
2125     }
2126 }
2127
2128 void audio_help(void)
2129 {
2130     int i;
2131
2132     printf("Available audio drivers:\n");
2133
2134     for (i = 0; i < AUDIODEV_DRIVER__MAX; i++) {
2135         audio_driver *driver = audio_driver_lookup(AudiodevDriver_str(i));
2136         if (driver) {
2137             printf("%s\n", driver->name);
2138         }
2139     }
2140 }
2141
2142 void audio_parse_option(const char *opt)
2143 {
2144     Audiodev *dev = NULL;
2145
2146     if (is_help_option(opt)) {
2147         audio_help();
2148         exit(EXIT_SUCCESS);
2149     }
2150     Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
2151     visit_type_Audiodev(v, NULL, &dev, &error_fatal);
2152     visit_free(v);
2153
2154     audio_define(dev);
2155 }
2156
2157 void audio_define(Audiodev *dev)
2158 {
2159     AudiodevListEntry *e;
2160
2161     audio_validate_opts(dev, &error_fatal);
2162
2163     e = g_new0(AudiodevListEntry, 1);
2164     e->dev = dev;
2165     QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
2166 }
2167
2168 bool audio_init_audiodevs(void)
2169 {
2170     AudiodevListEntry *e;
2171
2172     QSIMPLEQ_FOREACH(e, &audiodevs, next) {
2173         if (!audio_init(e->dev, NULL)) {
2174             return false;
2175         }
2176     }
2177
2178     return true;
2179 }
2180
2181 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
2182 {
2183     return (audsettings) {
2184         .freq = pdo->frequency,
2185         .nchannels = pdo->channels,
2186         .fmt = pdo->format,
2187         .endianness = AUDIO_HOST_ENDIANNESS,
2188     };
2189 }
2190
2191 int audioformat_bytes_per_sample(AudioFormat fmt)
2192 {
2193     switch (fmt) {
2194     case AUDIO_FORMAT_U8:
2195     case AUDIO_FORMAT_S8:
2196         return 1;
2197
2198     case AUDIO_FORMAT_U16:
2199     case AUDIO_FORMAT_S16:
2200         return 2;
2201
2202     case AUDIO_FORMAT_U32:
2203     case AUDIO_FORMAT_S32:
2204     case AUDIO_FORMAT_F32:
2205         return 4;
2206
2207     case AUDIO_FORMAT__MAX:
2208         ;
2209     }
2210     abort();
2211 }
2212
2213
2214 /* frames = freq * usec / 1e6 */
2215 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
2216                         audsettings *as, int def_usecs)
2217 {
2218     uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
2219     return (as->freq * usecs + 500000) / 1000000;
2220 }
2221
2222 /* samples = channels * frames = channels * freq * usec / 1e6 */
2223 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
2224                          audsettings *as, int def_usecs)
2225 {
2226     return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
2227 }
2228
2229 /*
2230  * bytes = bytes_per_sample * samples =
2231  *     bytes_per_sample * channels * freq * usec / 1e6
2232  */
2233 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
2234                        audsettings *as, int def_usecs)
2235 {
2236     return audio_buffer_samples(pdo, as, def_usecs) *
2237         audioformat_bytes_per_sample(as->fmt);
2238 }
2239
2240 AudioState *audio_state_by_name(const char *name)
2241 {
2242     AudioState *s;
2243     QTAILQ_FOREACH(s, &audio_states, list) {
2244         assert(s->dev);
2245         if (strcmp(name, s->dev->id) == 0) {
2246             return s;
2247         }
2248     }
2249     return NULL;
2250 }
2251
2252 const char *audio_get_id(QEMUSoundCard *card)
2253 {
2254     if (card->state) {
2255         assert(card->state->dev);
2256         return card->state->dev->id;
2257     } else {
2258         return "";
2259     }
2260 }
2261
2262 const char *audio_application_name(void)
2263 {
2264     const char *vm_name;
2265
2266     vm_name = qemu_get_vm_name();
2267     return vm_name ? vm_name : "qemu";
2268 }
2269
2270 void audio_rate_start(RateCtl *rate)
2271 {
2272     memset(rate, 0, sizeof(RateCtl));
2273     rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2274 }
2275
2276 size_t audio_rate_peek_bytes(RateCtl *rate, struct audio_pcm_info *info)
2277 {
2278     int64_t now;
2279     int64_t ticks;
2280     int64_t bytes;
2281     int64_t frames;
2282
2283     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2284     ticks = now - rate->start_ticks;
2285     bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
2286     frames = (bytes - rate->bytes_sent) / info->bytes_per_frame;
2287     if (frames < 0 || frames > 65536) {
2288         AUD_log(NULL, "Resetting rate control (%" PRId64 " frames)\n", frames);
2289         audio_rate_start(rate);
2290         frames = 0;
2291     }
2292
2293     return frames * info->bytes_per_frame;
2294 }
2295
2296 void audio_rate_add_bytes(RateCtl *rate, size_t bytes_used)
2297 {
2298     rate->bytes_sent += bytes_used;
2299 }
2300
2301 size_t audio_rate_get_bytes(RateCtl *rate, struct audio_pcm_info *info,
2302                             size_t bytes_avail)
2303 {
2304     size_t bytes;
2305
2306     bytes = audio_rate_peek_bytes(rate, info);
2307     bytes = MIN(bytes, bytes_avail);
2308     audio_rate_add_bytes(rate, bytes);
2309
2310     return bytes;
2311 }