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 #include "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "audio.h"
  27 #include "monitor/monitor.h"
  28 #include "qemu/timer.h"
  29 #include "qapi/error.h"
  30 #include "qapi/qobject-input-visitor.h"
  31 #include "qapi/qapi-visit-audio.h"
  32 #include "sysemu/sysemu.h"
  33 #include "qemu/cutils.h"
  34 #include "sysemu/replay.h"
  35 #include "trace.h"
  36
  37 #define AUDIO_CAP "audio"
  38 #include "audio_int.h"
  39
  40 /* #define DEBUG_LIVE */
  41 /* #define DEBUG_OUT */
  42 /* #define DEBUG_CAPTURE */
  43 /* #define DEBUG_POLL */
  44
  45 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  46
  47
  48 /* Order of CONFIG_AUDIO_DRIVERS is import.
  49    The 1st one is the one used by default, that is the reason
  50     that we generate the list.
  51 */
  52 const char *audio_prio_list[] = {
  53     "spice",
  54     CONFIG_AUDIO_DRIVERS
  55     "none",
  56     "wav",
  57     NULL
  58 };
  59
  60 static QLIST_HEAD(, audio_driver) audio_drivers;
  61 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs);
  62
  63 void audio_driver_register(audio_driver *drv)
  64 {
  65     QLIST_INSERT_HEAD(&audio_drivers, drv, next);
  66 }
  67
  68 audio_driver *audio_driver_lookup(const char *name)
  69 {
  70     struct audio_driver *d;
  71
  72     QLIST_FOREACH(d, &audio_drivers, next) {
  73         if (strcmp(name, d->name) == 0) {
  74             return d;
  75         }
  76     }
  77
  78     audio_module_load_one(name);
  79     QLIST_FOREACH(d, &audio_drivers, next) {
  80         if (strcmp(name, d->name) == 0) {
  81             return d;
  82         }
  83     }
  84
  85     return NULL;
  86 }
  87
  88 static AudioState glob_audio_state;
  89
  90 const struct mixeng_volume nominal_volume = {
  91     .mute = 0,
  92 #ifdef FLOAT_MIXENG
  93     .r = 1.0,
  94     .l = 1.0,
  95 #else
  96     .r = 1ULL << 32,
  97     .l = 1ULL << 32,
  98 #endif
  99 };
 100
 101 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 102 #error No its not
 103 #else
 104 int audio_bug (const char *funcname, int cond)
 105 {
 106     if (cond) {
 107         static int shown;
 108
 109         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 110         if (!shown) {
 111             shown = 1;
 112             AUD_log (NULL, "Save all your work and restart without audio\n");
 113             AUD_log (NULL, "I am sorry\n");
 114         }
 115         AUD_log (NULL, "Context:\n");
 116
 117 #if defined AUDIO_BREAKPOINT_ON_BUG
 118 #  if defined HOST_I386
 119 #    if defined __GNUC__
 120         __asm__ ("int3");
 121 #    elif defined _MSC_VER
 122         _asm _emit 0xcc;
 123 #    else
 124         abort ();
 125 #    endif
 126 #  else
 127         abort ();
 128 #  endif
 129 #endif
 130     }
 131
 132     return cond;
 133 }
 134 #endif
 135
 136 static inline int audio_bits_to_index (int bits)
 137 {
 138     switch (bits) {
 139     case 8:
 140         return 0;
 141
 142     case 16:
 143         return 1;
 144
 145     case 32:
 146         return 2;
 147
 148     default:
 149         audio_bug ("bits_to_index", 1);
 150         AUD_log (NULL, "invalid bits %d\n", bits);
 151         return 0;
 152     }
 153 }
 154
 155 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 156 {
 157     int cond;
 158     size_t len;
 159
 160     len = nmemb * size;
 161     cond = !nmemb || !size;
 162     cond |= nmemb < 0;
 163     cond |= len < size;
 164
 165     if (audio_bug ("audio_calloc", cond)) {
 166         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 167                  funcname);
 168         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 169         return NULL;
 170     }
 171
 172     return g_malloc0 (len);
 173 }
 174
 175 static const char *audio_audfmt_to_string (AudioFormat fmt)
 176 {
 177     switch (fmt) {
 178     case AUDIO_FORMAT_U8:
 179         return "U8";
 180
 181     case AUDIO_FORMAT_U16:
 182         return "U16";
 183
 184     case AUDIO_FORMAT_S8:
 185         return "S8";
 186
 187     case AUDIO_FORMAT_S16:
 188         return "S16";
 189
 190     case AUDIO_FORMAT_U32:
 191         return "U32";
 192
 193     case AUDIO_FORMAT_S32:
 194         return "S32";
 195
 196     default:
 197         abort();
 198     }
 199
 200     dolog ("Bogus audfmt %d returning S16\n", fmt);
 201     return "S16";
 202 }
 203
 204 static AudioFormat audio_string_to_audfmt (const char *s, AudioFormat defval,
 205                                         int *defaultp)
 206 {
 207     if (!strcasecmp (s, "u8")) {
 208         *defaultp = 0;
 209         return AUDIO_FORMAT_U8;
 210     }
 211     else if (!strcasecmp (s, "u16")) {
 212         *defaultp = 0;
 213         return AUDIO_FORMAT_U16;
 214     }
 215     else if (!strcasecmp (s, "u32")) {
 216         *defaultp = 0;
 217         return AUDIO_FORMAT_U32;
 218     }
 219     else if (!strcasecmp (s, "s8")) {
 220         *defaultp = 0;
 221         return AUDIO_FORMAT_S8;
 222     }
 223     else if (!strcasecmp (s, "s16")) {
 224         *defaultp = 0;
 225         return AUDIO_FORMAT_S16;
 226     }
 227     else if (!strcasecmp (s, "s32")) {
 228         *defaultp = 0;
 229         return AUDIO_FORMAT_S32;
 230     }
 231     else {
 232         dolog ("Bogus audio format `%s' using %s\n",
 233                s, audio_audfmt_to_string (defval));
 234         *defaultp = 1;
 235         return defval;
 236     }
 237 }
 238
 239 static AudioFormat audio_get_conf_fmt (const char *envname,
 240                                     AudioFormat defval,
 241                                     int *defaultp)
 242 {
 243     const char *var = getenv (envname);
 244     if (!var) {
 245         *defaultp = 1;
 246         return defval;
 247     }
 248     return audio_string_to_audfmt (var, defval, defaultp);
 249 }
 250
 251 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 252 {
 253     int val;
 254     char *strval;
 255
 256     strval = getenv (key);
 257     if (strval && !qemu_strtoi(strval, NULL, 10, &val)) {
 258         *defaultp = 0;
 259         return val;
 260     }
 261     else {
 262         *defaultp = 1;
 263         return defval;
 264     }
 265 }
 266
 267 static const char *audio_get_conf_str (const char *key,
 268                                        const char *defval,
 269                                        int *defaultp)
 270 {
 271     const char *val = getenv (key);
 272     if (!val) {
 273         *defaultp = 1;
 274         return defval;
 275     }
 276     else {
 277         *defaultp = 0;
 278         return val;
 279     }
 280 }
 281
 282 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 283 {
 284     if (cap) {
 285         fprintf(stderr, "%s: ", cap);
 286     }
 287
 288     vfprintf(stderr, fmt, ap);
 289 }
 290
 291 void AUD_log (const char *cap, const char *fmt, ...)
 292 {
 293     va_list ap;
 294
 295     va_start (ap, fmt);
 296     AUD_vlog (cap, fmt, ap);
 297     va_end (ap);
 298 }
 299
 300 static void audio_process_options (const char *prefix,
 301                                    struct audio_option *opt)
 302 {
 303     gchar *prefix_upper;
 304
 305     if (audio_bug(__func__, !prefix)) {
 306         dolog ("prefix = NULL\n");
 307         return;
 308     }
 309
 310     if (audio_bug(__func__, !opt)) {
 311         dolog ("opt = NULL\n");
 312         return;
 313     }
 314
 315     prefix_upper = g_utf8_strup(prefix, -1);
 316
 317     for (; opt->name; opt++) {
 318         char *optname;
 319         int def;
 320
 321         if (!opt->valp) {
 322             dolog ("Option value pointer for `%s' is not set\n",
 323                    opt->name);
 324             continue;
 325         }
 326
 327         optname = g_strdup_printf("QEMU_%s_%s", prefix_upper, opt->name);
 328
 329         def = 1;
 330         switch (opt->tag) {
 331         case AUD_OPT_BOOL:
 332         case AUD_OPT_INT:
 333             {
 334                 int *intp = opt->valp;
 335                 *intp = audio_get_conf_int (optname, *intp, &def);
 336             }
 337             break;
 338
 339         case AUD_OPT_FMT:
 340             {
 341                 AudioFormat *fmtp = opt->valp;
 342                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 343             }
 344             break;
 345
 346         case AUD_OPT_STR:
 347             {
 348                 const char **strp = opt->valp;
 349                 *strp = audio_get_conf_str (optname, *strp, &def);
 350             }
 351             break;
 352
 353         default:
 354             dolog ("Bad value tag for option `%s' - %d\n",
 355                    optname, opt->tag);
 356             break;
 357         }
 358
 359         if (!opt->overriddenp) {
 360             opt->overriddenp = &opt->overridden;
 361         }
 362         *opt->overriddenp = !def;
 363         g_free (optname);
 364     }
 365     g_free(prefix_upper);
 366 }
 367
 368 static void audio_print_settings (struct audsettings *as)
 369 {
 370     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 371
 372     switch (as->fmt) {
 373     case AUDIO_FORMAT_S8:
 374         AUD_log (NULL, "S8");
 375         break;
 376     case AUDIO_FORMAT_U8:
 377         AUD_log (NULL, "U8");
 378         break;
 379     case AUDIO_FORMAT_S16:
 380         AUD_log (NULL, "S16");
 381         break;
 382     case AUDIO_FORMAT_U16:
 383         AUD_log (NULL, "U16");
 384         break;
 385     case AUDIO_FORMAT_S32:
 386         AUD_log (NULL, "S32");
 387         break;
 388     case AUDIO_FORMAT_U32:
 389         AUD_log (NULL, "U32");
 390         break;
 391     default:
 392         AUD_log (NULL, "invalid(%d)", as->fmt);
 393         break;
 394     }
 395
 396     AUD_log (NULL, " endianness=");
 397     switch (as->endianness) {
 398     case 0:
 399         AUD_log (NULL, "little");
 400         break;
 401     case 1:
 402         AUD_log (NULL, "big");
 403         break;
 404     default:
 405         AUD_log (NULL, "invalid");
 406         break;
 407     }
 408     AUD_log (NULL, "\n");
 409 }
 410
 411 static int audio_validate_settings (struct audsettings *as)
 412 {
 413     int invalid;
 414
 415     invalid = as->nchannels != 1 && as->nchannels != 2;
 416     invalid |= as->endianness != 0 && as->endianness != 1;
 417
 418     switch (as->fmt) {
 419     case AUDIO_FORMAT_S8:
 420     case AUDIO_FORMAT_U8:
 421     case AUDIO_FORMAT_S16:
 422     case AUDIO_FORMAT_U16:
 423     case AUDIO_FORMAT_S32:
 424     case AUDIO_FORMAT_U32:
 425         break;
 426     default:
 427         invalid = 1;
 428         break;
 429     }
 430
 431     invalid |= as->freq <= 0;
 432     return invalid ? -1 : 0;
 433 }
 434
 435 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 436 {
 437     int bits = 8, sign = 0;
 438
 439     switch (as->fmt) {
 440     case AUDIO_FORMAT_S8:
 441         sign = 1;
 442         /* fall through */
 443     case AUDIO_FORMAT_U8:
 444         break;
 445
 446     case AUDIO_FORMAT_S16:
 447         sign = 1;
 448         /* fall through */
 449     case AUDIO_FORMAT_U16:
 450         bits = 16;
 451         break;
 452
 453     case AUDIO_FORMAT_S32:
 454         sign = 1;
 455         /* fall through */
 456     case AUDIO_FORMAT_U32:
 457         bits = 32;
 458         break;
 459
 460     default:
 461         abort();
 462     }
 463     return info->freq == as->freq
 464         && info->nchannels == as->nchannels
 465         && info->sign == sign
 466         && info->bits == bits
 467         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 468 }
 469
 470 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 471 {
 472     int bits = 8, sign = 0, shift = 0;
 473
 474     switch (as->fmt) {
 475     case AUDIO_FORMAT_S8:
 476         sign = 1;
 477     case AUDIO_FORMAT_U8:
 478         break;
 479
 480     case AUDIO_FORMAT_S16:
 481         sign = 1;
 482     case AUDIO_FORMAT_U16:
 483         bits = 16;
 484         shift = 1;
 485         break;
 486
 487     case AUDIO_FORMAT_S32:
 488         sign = 1;
 489     case AUDIO_FORMAT_U32:
 490         bits = 32;
 491         shift = 2;
 492         break;
 493
 494     default:
 495         abort();
 496     }
 497
 498     info->freq = as->freq;
 499     info->bits = bits;
 500     info->sign = sign;
 501     info->nchannels = as->nchannels;
 502     info->shift = (as->nchannels == 2) + shift;
 503     info->align = (1 << info->shift) - 1;
 504     info->bytes_per_second = info->freq << info->shift;
 505     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 506 }
 507
 508 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 509 {
 510     if (!len) {
 511         return;
 512     }
 513
 514     if (info->sign) {
 515         memset (buf, 0x00, len << info->shift);
 516     }
 517     else {
 518         switch (info->bits) {
 519         case 8:
 520             memset (buf, 0x80, len << info->shift);
 521             break;
 522
 523         case 16:
 524             {
 525                 int i;
 526                 uint16_t *p = buf;
 527                 int shift = info->nchannels - 1;
 528                 short s = INT16_MAX;
 529
 530                 if (info->swap_endianness) {
 531                     s = bswap16 (s);
 532                 }
 533
 534                 for (i = 0; i < len << shift; i++) {
 535                     p[i] = s;
 536                 }
 537             }
 538             break;
 539
 540         case 32:
 541             {
 542                 int i;
 543                 uint32_t *p = buf;
 544                 int shift = info->nchannels - 1;
 545                 int32_t s = INT32_MAX;
 546
 547                 if (info->swap_endianness) {
 548                     s = bswap32 (s);
 549                 }
 550
 551                 for (i = 0; i < len << shift; i++) {
 552                     p[i] = s;
 553                 }
 554             }
 555             break;
 556
 557         default:
 558             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 559                      info->bits);
 560             break;
 561         }
 562     }
 563 }
 564
 565 /*
 566  * Capture
 567  */
 568 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 569 {
 570     (void) src;
 571     (void) dst;
 572     (void) samples;
 573 }
 574
 575 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 576     struct audsettings *as
 577     )
 578 {
 579     CaptureVoiceOut *cap;
 580     AudioState *s = &glob_audio_state;
 581
 582     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 583         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 584             return cap;
 585         }
 586     }
 587     return NULL;
 588 }
 589
 590 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 591 {
 592     struct capture_callback *cb;
 593
 594 #ifdef DEBUG_CAPTURE
 595     dolog ("notification %d sent\n", cmd);
 596 #endif
 597     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 598         cb->ops.notify (cb->opaque, cmd);
 599     }
 600 }
 601
 602 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 603 {
 604     if (cap->hw.enabled != enabled) {
 605         audcnotification_e cmd;
 606         cap->hw.enabled = enabled;
 607         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 608         audio_notify_capture (cap, cmd);
 609     }
 610 }
 611
 612 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 613 {
 614     HWVoiceOut *hw = &cap->hw;
 615     SWVoiceOut *sw;
 616     int enabled = 0;
 617
 618     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 619         if (sw->active) {
 620             enabled = 1;
 621             break;
 622         }
 623     }
 624     audio_capture_maybe_changed (cap, enabled);
 625 }
 626
 627 static void audio_detach_capture (HWVoiceOut *hw)
 628 {
 629     SWVoiceCap *sc = hw->cap_head.lh_first;
 630
 631     while (sc) {
 632         SWVoiceCap *sc1 = sc->entries.le_next;
 633         SWVoiceOut *sw = &sc->sw;
 634         CaptureVoiceOut *cap = sc->cap;
 635         int was_active = sw->active;
 636
 637         if (sw->rate) {
 638             st_rate_stop (sw->rate);
 639             sw->rate = NULL;
 640         }
 641
 642         QLIST_REMOVE (sw, entries);
 643         QLIST_REMOVE (sc, entries);
 644         g_free (sc);
 645         if (was_active) {
 646             /* We have removed soft voice from the capture:
 647                this might have changed the overall status of the capture
 648                since this might have been the only active voice */
 649             audio_recalc_and_notify_capture (cap);
 650         }
 651         sc = sc1;
 652     }
 653 }
 654
 655 static int audio_attach_capture (HWVoiceOut *hw)
 656 {
 657     AudioState *s = &glob_audio_state;
 658     CaptureVoiceOut *cap;
 659
 660     audio_detach_capture (hw);
 661     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 662         SWVoiceCap *sc;
 663         SWVoiceOut *sw;
 664         HWVoiceOut *hw_cap = &cap->hw;
 665
 666         sc = g_malloc0(sizeof(*sc));
 667
 668         sc->cap = cap;
 669         sw = &sc->sw;
 670         sw->hw = hw_cap;
 671         sw->info = hw->info;
 672         sw->empty = 1;
 673         sw->active = hw->enabled;
 674         sw->conv = noop_conv;
 675         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 676         sw->vol = nominal_volume;
 677         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 678         if (!sw->rate) {
 679             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 680             g_free (sw);
 681             return -1;
 682         }
 683         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 684         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 685 #ifdef DEBUG_CAPTURE
 686         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 687                                     hw, sw->info.freq, sw->info.bits,
 688                                     sw->info.nchannels);
 689         dolog ("Added %s active = %d\n", sw->name, sw->active);
 690 #endif
 691         if (sw->active) {
 692             audio_capture_maybe_changed (cap, 1);
 693         }
 694     }
 695     return 0;
 696 }
 697
 698 /*
 699  * Hard voice (capture)
 700  */
 701 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 702 {
 703     SWVoiceIn *sw;
 704     int m = hw->total_samples_captured;
 705
 706     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 707         if (sw->active) {
 708             m = audio_MIN (m, sw->total_hw_samples_acquired);
 709         }
 710     }
 711     return m;
 712 }
 713
 714 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 715 {
 716     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 717     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 718         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 719         return 0;
 720     }
 721     return live;
 722 }
 723
 724 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 725                            int live, int pending)
 726 {
 727     int left = hw->samples - pending;
 728     int len = audio_MIN (left, live);
 729     int clipped = 0;
 730
 731     while (len) {
 732         struct st_sample *src = hw->mix_buf + hw->rpos;
 733         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 734         int samples_till_end_of_buf = hw->samples - hw->rpos;
 735         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 736
 737         hw->clip (dst, src, samples_to_clip);
 738
 739         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 740         len -= samples_to_clip;
 741         clipped += samples_to_clip;
 742     }
 743     return clipped;
 744 }
 745
 746 /*
 747  * Soft voice (capture)
 748  */
 749 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 750 {
 751     HWVoiceIn *hw = sw->hw;
 752     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 753     int rpos;
 754
 755     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 756         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 757         return 0;
 758     }
 759
 760     rpos = hw->wpos - live;
 761     if (rpos >= 0) {
 762         return rpos;
 763     }
 764     else {
 765         return hw->samples + rpos;
 766     }
 767 }
 768
 769 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 770 {
 771     HWVoiceIn *hw = sw->hw;
 772     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 773     struct st_sample *src, *dst = sw->buf;
 774
 775     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 776
 777     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 778     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 779         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 780         return 0;
 781     }
 782
 783     samples = size >> sw->info.shift;
 784     if (!live) {
 785         return 0;
 786     }
 787
 788     swlim = (live * sw->ratio) >> 32;
 789     swlim = audio_MIN (swlim, samples);
 790
 791     while (swlim) {
 792         src = hw->conv_buf + rpos;
 793         isamp = hw->wpos - rpos;
 794         /* XXX: <= ? */
 795         if (isamp <= 0) {
 796             isamp = hw->samples - rpos;
 797         }
 798
 799         if (!isamp) {
 800             break;
 801         }
 802         osamp = swlim;
 803
 804         if (audio_bug(__func__, osamp < 0)) {
 805             dolog ("osamp=%d\n", osamp);
 806             return 0;
 807         }
 808
 809         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 810         swlim -= osamp;
 811         rpos = (rpos + isamp) % hw->samples;
 812         dst += osamp;
 813         ret += osamp;
 814         total += isamp;
 815     }
 816
 817     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 818         mixeng_volume (sw->buf, ret, &sw->vol);
 819     }
 820
 821     sw->clip (buf, sw->buf, ret);
 822     sw->total_hw_samples_acquired += total;
 823     return ret << sw->info.shift;
 824 }
 825
 826 /*
 827  * Hard voice (playback)
 828  */
 829 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 830 {
 831     SWVoiceOut *sw;
 832     int m = INT_MAX;
 833     int nb_live = 0;
 834
 835     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 836         if (sw->active || !sw->empty) {
 837             m = audio_MIN (m, sw->total_hw_samples_mixed);
 838             nb_live += 1;
 839         }
 840     }
 841
 842     *nb_livep = nb_live;
 843     return m;
 844 }
 845
 846 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 847 {
 848     int smin;
 849     int nb_live1;
 850
 851     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 852     if (nb_live) {
 853         *nb_live = nb_live1;
 854     }
 855
 856     if (nb_live1) {
 857         int live = smin;
 858
 859         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 860             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 861             return 0;
 862         }
 863         return live;
 864     }
 865     return 0;
 866 }
 867
 868 /*
 869  * Soft voice (playback)
 870  */
 871 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 872 {
 873     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
 874     int ret = 0, pos = 0, total = 0;
 875
 876     if (!sw) {
 877         return size;
 878     }
 879
 880     hwsamples = sw->hw->samples;
 881
 882     live = sw->total_hw_samples_mixed;
 883     if (audio_bug(__func__, live < 0 || live > hwsamples)) {
 884         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
 885         return 0;
 886     }
 887
 888     if (live == hwsamples) {
 889 #ifdef DEBUG_OUT
 890         dolog ("%s is full %d\n", sw->name, live);
 891 #endif
 892         return 0;
 893     }
 894
 895     wpos = (sw->hw->rpos + live) % hwsamples;
 896     samples = size >> sw->info.shift;
 897
 898     dead = hwsamples - live;
 899     swlim = ((int64_t) dead << 32) / sw->ratio;
 900     swlim = audio_MIN (swlim, samples);
 901     if (swlim) {
 902         sw->conv (sw->buf, buf, swlim);
 903
 904         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
 905             mixeng_volume (sw->buf, swlim, &sw->vol);
 906         }
 907     }
 908
 909     while (swlim) {
 910         dead = hwsamples - live;
 911         left = hwsamples - wpos;
 912         blck = audio_MIN (dead, left);
 913         if (!blck) {
 914             break;
 915         }
 916         isamp = swlim;
 917         osamp = blck;
 918         st_rate_flow_mix (
 919             sw->rate,
 920             sw->buf + pos,
 921             sw->hw->mix_buf + wpos,
 922             &isamp,
 923             &osamp
 924             );
 925         ret += isamp;
 926         swlim -= isamp;
 927         pos += isamp;
 928         live += osamp;
 929         wpos = (wpos + osamp) % hwsamples;
 930         total += osamp;
 931     }
 932
 933     sw->total_hw_samples_mixed += total;
 934     sw->empty = sw->total_hw_samples_mixed == 0;
 935
 936 #ifdef DEBUG_OUT
 937     dolog (
 938         "%s: write size %d ret %d total sw %d\n",
 939         SW_NAME (sw),
 940         size >> sw->info.shift,
 941         ret,
 942         sw->total_hw_samples_mixed
 943         );
 944 #endif
 945
 946     return ret << sw->info.shift;
 947 }
 948
 949 #ifdef DEBUG_AUDIO
 950 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
 951 {
 952     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
 953            cap, info->bits, info->sign, info->freq, info->nchannels);
 954 }
 955 #endif
 956
 957 #define DAC
 958 #include "audio_template.h"
 959 #undef DAC
 960 #include "audio_template.h"
 961
 962 /*
 963  * Timer
 964  */
 965
 966 static bool audio_timer_running;
 967 static uint64_t audio_timer_last;
 968
 969 static int audio_is_timer_needed (void)
 970 {
 971     HWVoiceIn *hwi = NULL;
 972     HWVoiceOut *hwo = NULL;
 973
 974     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
 975         if (!hwo->poll_mode) return 1;
 976     }
 977     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
 978         if (!hwi->poll_mode) return 1;
 979     }
 980     return 0;
 981 }
 982
 983 static void audio_reset_timer (AudioState *s)
 984 {
 985     if (audio_is_timer_needed ()) {
 986         timer_mod_anticipate_ns(s->ts,
 987             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks);
 988         if (!audio_timer_running) {
 989             audio_timer_running = true;
 990             audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 991             trace_audio_timer_start(s->period_ticks / SCALE_MS);
 992         }
 993     } else {
 994         timer_del(s->ts);
 995         if (audio_timer_running) {
 996             audio_timer_running = false;
 997             trace_audio_timer_stop();
 998         }
 999     }
1000 }
1001
1002 static void audio_timer (void *opaque)
1003 {
1004     int64_t now, diff;
1005     AudioState *s = opaque;
1006
1007     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1008     diff = now - audio_timer_last;
1009     if (diff > s->period_ticks * 3 / 2) {
1010         trace_audio_timer_delayed(diff / SCALE_MS);
1011     }
1012     audio_timer_last = now;
1013
1014     audio_run("timer");
1015     audio_reset_timer(s);
1016 }
1017
1018 /*
1019  * Public API
1020  */
1021 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1022 {
1023     if (!sw) {
1024         /* XXX: Consider options */
1025         return size;
1026     }
1027
1028     if (!sw->hw->enabled) {
1029         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1030         return 0;
1031     }
1032
1033     return sw->hw->pcm_ops->write(sw, buf, size);
1034 }
1035
1036 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1037 {
1038     if (!sw) {
1039         /* XXX: Consider options */
1040         return size;
1041     }
1042
1043     if (!sw->hw->enabled) {
1044         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1045         return 0;
1046     }
1047
1048     return sw->hw->pcm_ops->read(sw, buf, size);
1049 }
1050
1051 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1052 {
1053     return sw->hw->samples << sw->hw->info.shift;
1054 }
1055
1056 void AUD_set_active_out (SWVoiceOut *sw, int on)
1057 {
1058     HWVoiceOut *hw;
1059
1060     if (!sw) {
1061         return;
1062     }
1063
1064     hw = sw->hw;
1065     if (sw->active != on) {
1066         AudioState *s = &glob_audio_state;
1067         SWVoiceOut *temp_sw;
1068         SWVoiceCap *sc;
1069
1070         if (on) {
1071             hw->pending_disable = 0;
1072             if (!hw->enabled) {
1073                 hw->enabled = 1;
1074                 if (s->vm_running) {
1075                     hw->pcm_ops->ctl_out(hw, VOICE_ENABLE, true);
1076                     audio_reset_timer (s);
1077                 }
1078             }
1079         }
1080         else {
1081             if (hw->enabled) {
1082                 int nb_active = 0;
1083
1084                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1085                      temp_sw = temp_sw->entries.le_next) {
1086                     nb_active += temp_sw->active != 0;
1087                 }
1088
1089                 hw->pending_disable = nb_active == 1;
1090             }
1091         }
1092
1093         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1094             sc->sw.active = hw->enabled;
1095             if (hw->enabled) {
1096                 audio_capture_maybe_changed (sc->cap, 1);
1097             }
1098         }
1099         sw->active = on;
1100     }
1101 }
1102
1103 void AUD_set_active_in (SWVoiceIn *sw, int on)
1104 {
1105     HWVoiceIn *hw;
1106
1107     if (!sw) {
1108         return;
1109     }
1110
1111     hw = sw->hw;
1112     if (sw->active != on) {
1113         AudioState *s = &glob_audio_state;
1114         SWVoiceIn *temp_sw;
1115
1116         if (on) {
1117             if (!hw->enabled) {
1118                 hw->enabled = 1;
1119                 if (s->vm_running) {
1120                     hw->pcm_ops->ctl_in(hw, VOICE_ENABLE, true);
1121                     audio_reset_timer (s);
1122                 }
1123             }
1124             sw->total_hw_samples_acquired = hw->total_samples_captured;
1125         }
1126         else {
1127             if (hw->enabled) {
1128                 int nb_active = 0;
1129
1130                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1131                      temp_sw = temp_sw->entries.le_next) {
1132                     nb_active += temp_sw->active != 0;
1133                 }
1134
1135                 if (nb_active == 1) {
1136                     hw->enabled = 0;
1137                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1138                 }
1139             }
1140         }
1141         sw->active = on;
1142     }
1143 }
1144
1145 static int audio_get_avail (SWVoiceIn *sw)
1146 {
1147     int live;
1148
1149     if (!sw) {
1150         return 0;
1151     }
1152
1153     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1154     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1155         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1156         return 0;
1157     }
1158
1159     ldebug (
1160         "%s: get_avail live %d ret %" PRId64 "\n",
1161         SW_NAME (sw),
1162         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1163         );
1164
1165     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1166 }
1167
1168 static int audio_get_free (SWVoiceOut *sw)
1169 {
1170     int live, dead;
1171
1172     if (!sw) {
1173         return 0;
1174     }
1175
1176     live = sw->total_hw_samples_mixed;
1177
1178     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1179         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1180         return 0;
1181     }
1182
1183     dead = sw->hw->samples - live;
1184
1185 #ifdef DEBUG_OUT
1186     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1187            SW_NAME (sw),
1188            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1189 #endif
1190
1191     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1192 }
1193
1194 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1195 {
1196     int n;
1197
1198     if (hw->enabled) {
1199         SWVoiceCap *sc;
1200
1201         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1202             SWVoiceOut *sw = &sc->sw;
1203             int rpos2 = rpos;
1204
1205             n = samples;
1206             while (n) {
1207                 int till_end_of_hw = hw->samples - rpos2;
1208                 int to_write = audio_MIN (till_end_of_hw, n);
1209                 int bytes = to_write << hw->info.shift;
1210                 int written;
1211
1212                 sw->buf = hw->mix_buf + rpos2;
1213                 written = audio_pcm_sw_write (sw, NULL, bytes);
1214                 if (written - bytes) {
1215                     dolog ("Could not mix %d bytes into a capture "
1216                            "buffer, mixed %d\n",
1217                            bytes, written);
1218                     break;
1219                 }
1220                 n -= to_write;
1221                 rpos2 = (rpos2 + to_write) % hw->samples;
1222             }
1223         }
1224     }
1225
1226     n = audio_MIN (samples, hw->samples - rpos);
1227     mixeng_clear (hw->mix_buf + rpos, n);
1228     mixeng_clear (hw->mix_buf, samples - n);
1229 }
1230
1231 static void audio_run_out (AudioState *s)
1232 {
1233     HWVoiceOut *hw = NULL;
1234     SWVoiceOut *sw;
1235
1236     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1237         int played;
1238         int live, free, nb_live, cleanup_required, prev_rpos;
1239
1240         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1241         if (!nb_live) {
1242             live = 0;
1243         }
1244
1245         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1246             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1247             continue;
1248         }
1249
1250         if (hw->pending_disable && !nb_live) {
1251             SWVoiceCap *sc;
1252 #ifdef DEBUG_OUT
1253             dolog ("Disabling voice\n");
1254 #endif
1255             hw->enabled = 0;
1256             hw->pending_disable = 0;
1257             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1258             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1259                 sc->sw.active = 0;
1260                 audio_recalc_and_notify_capture (sc->cap);
1261             }
1262             continue;
1263         }
1264
1265         if (!live) {
1266             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1267                 if (sw->active) {
1268                     free = audio_get_free (sw);
1269                     if (free > 0) {
1270                         sw->callback.fn (sw->callback.opaque, free);
1271                     }
1272                 }
1273             }
1274             continue;
1275         }
1276
1277         prev_rpos = hw->rpos;
1278         played = hw->pcm_ops->run_out (hw, live);
1279         replay_audio_out(&played);
1280         if (audio_bug(__func__, hw->rpos >= hw->samples)) {
1281             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1282                    hw->rpos, hw->samples, played);
1283             hw->rpos = 0;
1284         }
1285
1286 #ifdef DEBUG_OUT
1287         dolog ("played=%d\n", played);
1288 #endif
1289
1290         if (played) {
1291             hw->ts_helper += played;
1292             audio_capture_mix_and_clear (hw, prev_rpos, played);
1293         }
1294
1295         cleanup_required = 0;
1296         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1297             if (!sw->active && sw->empty) {
1298                 continue;
1299             }
1300
1301             if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1302                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1303                        played, sw->total_hw_samples_mixed);
1304                 played = sw->total_hw_samples_mixed;
1305             }
1306
1307             sw->total_hw_samples_mixed -= played;
1308
1309             if (!sw->total_hw_samples_mixed) {
1310                 sw->empty = 1;
1311                 cleanup_required |= !sw->active && !sw->callback.fn;
1312             }
1313
1314             if (sw->active) {
1315                 free = audio_get_free (sw);
1316                 if (free > 0) {
1317                     sw->callback.fn (sw->callback.opaque, free);
1318                 }
1319             }
1320         }
1321
1322         if (cleanup_required) {
1323             SWVoiceOut *sw1;
1324
1325             sw = hw->sw_head.lh_first;
1326             while (sw) {
1327                 sw1 = sw->entries.le_next;
1328                 if (!sw->active && !sw->callback.fn) {
1329                     audio_close_out (sw);
1330                 }
1331                 sw = sw1;
1332             }
1333         }
1334     }
1335 }
1336
1337 static void audio_run_in (AudioState *s)
1338 {
1339     HWVoiceIn *hw = NULL;
1340
1341     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1342         SWVoiceIn *sw;
1343         int captured = 0, min;
1344
1345         if (replay_mode != REPLAY_MODE_PLAY) {
1346             captured = hw->pcm_ops->run_in(hw);
1347         }
1348         replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
1349
1350         min = audio_pcm_hw_find_min_in (hw);
1351         hw->total_samples_captured += captured - min;
1352         hw->ts_helper += captured;
1353
1354         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1355             sw->total_hw_samples_acquired -= min;
1356
1357             if (sw->active) {
1358                 int avail;
1359
1360                 avail = audio_get_avail (sw);
1361                 if (avail > 0) {
1362                     sw->callback.fn (sw->callback.opaque, avail);
1363                 }
1364             }
1365         }
1366     }
1367 }
1368
1369 static void audio_run_capture (AudioState *s)
1370 {
1371     CaptureVoiceOut *cap;
1372
1373     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1374         int live, rpos, captured;
1375         HWVoiceOut *hw = &cap->hw;
1376         SWVoiceOut *sw;
1377
1378         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1379         rpos = hw->rpos;
1380         while (live) {
1381             int left = hw->samples - rpos;
1382             int to_capture = audio_MIN (live, left);
1383             struct st_sample *src;
1384             struct capture_callback *cb;
1385
1386             src = hw->mix_buf + rpos;
1387             hw->clip (cap->buf, src, to_capture);
1388             mixeng_clear (src, to_capture);
1389
1390             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1391                 cb->ops.capture (cb->opaque, cap->buf,
1392                                  to_capture << hw->info.shift);
1393             }
1394             rpos = (rpos + to_capture) % hw->samples;
1395             live -= to_capture;
1396         }
1397         hw->rpos = rpos;
1398
1399         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1400             if (!sw->active && sw->empty) {
1401                 continue;
1402             }
1403
1404             if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1405                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1406                        captured, sw->total_hw_samples_mixed);
1407                 captured = sw->total_hw_samples_mixed;
1408             }
1409
1410             sw->total_hw_samples_mixed -= captured;
1411             sw->empty = sw->total_hw_samples_mixed == 0;
1412         }
1413     }
1414 }
1415
1416 void audio_run (const char *msg)
1417 {
1418     AudioState *s = &glob_audio_state;
1419
1420     audio_run_out (s);
1421     audio_run_in (s);
1422     audio_run_capture (s);
1423 #ifdef DEBUG_POLL
1424     {
1425         static double prevtime;
1426         double currtime;
1427         struct timeval tv;
1428
1429         if (gettimeofday (&tv, NULL)) {
1430             perror ("audio_run: gettimeofday");
1431             return;
1432         }
1433
1434         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1435         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1436         prevtime = currtime;
1437     }
1438 #endif
1439 }
1440
1441 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1442                              bool msg, Audiodev *dev)
1443 {
1444     if (drv->options) {
1445         audio_process_options (drv->name, drv->options);
1446     }
1447     s->drv_opaque = drv->init(dev);
1448
1449     if (s->drv_opaque) {
1450         audio_init_nb_voices_out (drv);
1451         audio_init_nb_voices_in (drv);
1452         s->drv = drv;
1453         return 0;
1454     }
1455     else {
1456         if (msg) {
1457             dolog("Could not init `%s' audio driver\n", drv->name);
1458         }
1459         return -1;
1460     }
1461 }
1462
1463 static void audio_vm_change_state_handler (void *opaque, int running,
1464                                            RunState state)
1465 {
1466     AudioState *s = opaque;
1467     HWVoiceOut *hwo = NULL;
1468     HWVoiceIn *hwi = NULL;
1469     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1470
1471     s->vm_running = running;
1472     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1473         hwo->pcm_ops->ctl_out(hwo, op, true);
1474     }
1475
1476     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1477         hwi->pcm_ops->ctl_in(hwi, op, true);
1478     }
1479     audio_reset_timer (s);
1480 }
1481
1482 static bool is_cleaning_up;
1483
1484 bool audio_is_cleaning_up(void)
1485 {
1486     return is_cleaning_up;
1487 }
1488
1489 void audio_cleanup(void)
1490 {
1491     AudioState *s = &glob_audio_state;
1492     HWVoiceOut *hwo, *hwon;
1493     HWVoiceIn *hwi, *hwin;
1494
1495     is_cleaning_up = true;
1496     QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1497         SWVoiceCap *sc;
1498
1499         if (hwo->enabled) {
1500             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1501         }
1502         hwo->pcm_ops->fini_out (hwo);
1503
1504         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1505             CaptureVoiceOut *cap = sc->cap;
1506             struct capture_callback *cb;
1507
1508             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1509                 cb->ops.destroy (cb->opaque);
1510             }
1511         }
1512         QLIST_REMOVE(hwo, entries);
1513     }
1514
1515     QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1516         if (hwi->enabled) {
1517             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1518         }
1519         hwi->pcm_ops->fini_in (hwi);
1520         QLIST_REMOVE(hwi, entries);
1521     }
1522
1523     if (s->drv) {
1524         s->drv->fini (s->drv_opaque);
1525         s->drv = NULL;
1526     }
1527
1528     if (s->dev) {
1529         qapi_free_Audiodev(s->dev);
1530         s->dev = NULL;
1531     }
1532 }
1533
1534 static const VMStateDescription vmstate_audio = {
1535     .name = "audio",
1536     .version_id = 1,
1537     .minimum_version_id = 1,
1538     .fields = (VMStateField[]) {
1539         VMSTATE_END_OF_LIST()
1540     }
1541 };
1542
1543 static void audio_validate_opts(Audiodev *dev, Error **errp);
1544
1545 static AudiodevListEntry *audiodev_find(
1546     AudiodevListHead *head, const char *drvname)
1547 {
1548     AudiodevListEntry *e;
1549     QSIMPLEQ_FOREACH(e, head, next) {
1550         if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1551             return e;
1552         }
1553     }
1554
1555     return NULL;
1556 }
1557
1558 static int audio_init(Audiodev *dev)
1559 {
1560     size_t i;
1561     int done = 0;
1562     const char *drvname = NULL;
1563     VMChangeStateEntry *e;
1564     AudioState *s = &glob_audio_state;
1565     struct audio_driver *driver;
1566     /* silence gcc warning about uninitialized variable */
1567     AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1568
1569     if (s->drv) {
1570         if (dev) {
1571             dolog("Cannot create more than one audio backend, sorry\n");
1572             qapi_free_Audiodev(dev);
1573         }
1574         return -1;
1575     }
1576
1577     if (dev) {
1578         /* -audiodev option */
1579         drvname = AudiodevDriver_str(dev->driver);
1580     } else {
1581         /* legacy implicit initialization */
1582         head = audio_handle_legacy_opts();
1583         /*
1584          * In case of legacy initialization, all Audiodevs in the list will have
1585          * the same configuration (except the driver), so it does't matter which
1586          * one we chose.  We need an Audiodev to set up AudioState before we can
1587          * init a driver.  Also note that dev at this point is still in the
1588          * list.
1589          */
1590         dev = QSIMPLEQ_FIRST(&head)->dev;
1591         audio_validate_opts(dev, &error_abort);
1592     }
1593     s->dev = dev;
1594
1595     QLIST_INIT (&s->hw_head_out);
1596     QLIST_INIT (&s->hw_head_in);
1597     QLIST_INIT (&s->cap_head);
1598     atexit(audio_cleanup);
1599
1600     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1601
1602     s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1603     s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1604
1605     if (s->nb_hw_voices_out <= 0) {
1606         dolog ("Bogus number of playback voices %d, setting to 1\n",
1607                s->nb_hw_voices_out);
1608         s->nb_hw_voices_out = 1;
1609     }
1610
1611     if (s->nb_hw_voices_in <= 0) {
1612         dolog ("Bogus number of capture voices %d, setting to 0\n",
1613                s->nb_hw_voices_in);
1614         s->nb_hw_voices_in = 0;
1615     }
1616
1617     if (drvname) {
1618         driver = audio_driver_lookup(drvname);
1619         if (driver) {
1620             done = !audio_driver_init(s, driver, true, dev);
1621         } else {
1622             dolog ("Unknown audio driver `%s'\n", drvname);
1623         }
1624     } else {
1625         for (i = 0; audio_prio_list[i]; i++) {
1626             AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1627             driver = audio_driver_lookup(audio_prio_list[i]);
1628
1629             if (e && driver) {
1630                 s->dev = dev = e->dev;
1631                 audio_validate_opts(dev, &error_abort);
1632                 done = !audio_driver_init(s, driver, false, dev);
1633                 if (done) {
1634                     e->dev = NULL;
1635                     break;
1636                 }
1637             }
1638         }
1639     }
1640     audio_free_audiodev_list(&head);
1641
1642     if (!done) {
1643         driver = audio_driver_lookup("none");
1644         done = !audio_driver_init(s, driver, false, dev);
1645         assert(done);
1646         dolog("warning: Using timer based audio emulation\n");
1647     }
1648
1649     if (dev->timer_period <= 0) {
1650         s->period_ticks = 1;
1651     } else {
1652         s->period_ticks = NANOSECONDS_PER_SECOND / dev->timer_period;
1653     }
1654
1655     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1656     if (!e) {
1657         dolog ("warning: Could not register change state handler\n"
1658                "(Audio can continue looping even after stopping the VM)\n");
1659     }
1660
1661     QLIST_INIT (&s->card_head);
1662     vmstate_register (NULL, 0, &vmstate_audio, s);
1663     return 0;
1664 }
1665
1666 void audio_free_audiodev_list(AudiodevListHead *head)
1667 {
1668     AudiodevListEntry *e;
1669     while ((e = QSIMPLEQ_FIRST(head))) {
1670         QSIMPLEQ_REMOVE_HEAD(head, next);
1671         qapi_free_Audiodev(e->dev);
1672         g_free(e);
1673     }
1674 }
1675
1676 void AUD_register_card (const char *name, QEMUSoundCard *card)
1677 {
1678     audio_init(NULL);
1679     card->name = g_strdup (name);
1680     memset (&card->entries, 0, sizeof (card->entries));
1681     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1682 }
1683
1684 void AUD_remove_card (QEMUSoundCard *card)
1685 {
1686     QLIST_REMOVE (card, entries);
1687     g_free (card->name);
1688 }
1689
1690
1691 CaptureVoiceOut *AUD_add_capture (
1692     struct audsettings *as,
1693     struct audio_capture_ops *ops,
1694     void *cb_opaque
1695     )
1696 {
1697     AudioState *s = &glob_audio_state;
1698     CaptureVoiceOut *cap;
1699     struct capture_callback *cb;
1700
1701     if (audio_validate_settings (as)) {
1702         dolog ("Invalid settings were passed when trying to add capture\n");
1703         audio_print_settings (as);
1704         return NULL;
1705     }
1706
1707     cb = g_malloc0(sizeof(*cb));
1708     cb->ops = *ops;
1709     cb->opaque = cb_opaque;
1710
1711     cap = audio_pcm_capture_find_specific (as);
1712     if (cap) {
1713         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1714         return cap;
1715     }
1716     else {
1717         HWVoiceOut *hw;
1718         CaptureVoiceOut *cap;
1719
1720         cap = g_malloc0(sizeof(*cap));
1721
1722         hw = &cap->hw;
1723         QLIST_INIT (&hw->sw_head);
1724         QLIST_INIT (&cap->cb_head);
1725
1726         /* XXX find a more elegant way */
1727         hw->samples = 4096 * 4;
1728         hw->mix_buf = g_new0(struct st_sample, hw->samples);
1729
1730         audio_pcm_init_info (&hw->info, as);
1731
1732         cap->buf = g_malloc0_n(hw->samples, 1 << hw->info.shift);
1733
1734         hw->clip = mixeng_clip
1735             [hw->info.nchannels == 2]
1736             [hw->info.sign]
1737             [hw->info.swap_endianness]
1738             [audio_bits_to_index (hw->info.bits)];
1739
1740         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1741         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1742
1743         QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
1744             audio_attach_capture (hw);
1745         }
1746         return cap;
1747     }
1748 }
1749
1750 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1751 {
1752     struct capture_callback *cb;
1753
1754     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1755         if (cb->opaque == cb_opaque) {
1756             cb->ops.destroy (cb_opaque);
1757             QLIST_REMOVE (cb, entries);
1758             g_free (cb);
1759
1760             if (!cap->cb_head.lh_first) {
1761                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1762
1763                 while (sw) {
1764                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1765 #ifdef DEBUG_CAPTURE
1766                     dolog ("freeing %s\n", sw->name);
1767 #endif
1768
1769                     sw1 = sw->entries.le_next;
1770                     if (sw->rate) {
1771                         st_rate_stop (sw->rate);
1772                         sw->rate = NULL;
1773                     }
1774                     QLIST_REMOVE (sw, entries);
1775                     QLIST_REMOVE (sc, entries);
1776                     g_free (sc);
1777                     sw = sw1;
1778                 }
1779                 QLIST_REMOVE (cap, entries);
1780                 g_free (cap->hw.mix_buf);
1781                 g_free (cap->buf);
1782                 g_free (cap);
1783             }
1784             return;
1785         }
1786     }
1787 }
1788
1789 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1790 {
1791     if (sw) {
1792         HWVoiceOut *hw = sw->hw;
1793
1794         sw->vol.mute = mute;
1795         sw->vol.l = nominal_volume.l * lvol / 255;
1796         sw->vol.r = nominal_volume.r * rvol / 255;
1797
1798         if (hw->pcm_ops->ctl_out) {
1799             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
1800         }
1801     }
1802 }
1803
1804 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1805 {
1806     if (sw) {
1807         HWVoiceIn *hw = sw->hw;
1808
1809         sw->vol.mute = mute;
1810         sw->vol.l = nominal_volume.l * lvol / 255;
1811         sw->vol.r = nominal_volume.r * rvol / 255;
1812
1813         if (hw->pcm_ops->ctl_in) {
1814             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
1815         }
1816     }
1817 }
1818
1819 void audio_create_pdos(Audiodev *dev)
1820 {
1821     switch (dev->driver) {
1822 #define CASE(DRIVER, driver, pdo_name)                              \
1823     case AUDIODEV_DRIVER_##DRIVER:                                  \
1824         if (!dev->u.driver.has_in) {                                \
1825             dev->u.driver.in = g_malloc0(                           \
1826                 sizeof(Audiodev##pdo_name##PerDirectionOptions));   \
1827             dev->u.driver.has_in = true;                            \
1828         }                                                           \
1829         if (!dev->u.driver.has_out) {                               \
1830             dev->u.driver.out = g_malloc0(                          \
1831                 sizeof(AudiodevAlsaPerDirectionOptions));           \
1832             dev->u.driver.has_out = true;                           \
1833         }                                                           \
1834         break
1835
1836         CASE(NONE, none, );
1837         CASE(ALSA, alsa, Alsa);
1838         CASE(COREAUDIO, coreaudio, Coreaudio);
1839         CASE(DSOUND, dsound, );
1840         CASE(OSS, oss, Oss);
1841         CASE(PA, pa, Pa);
1842         CASE(SDL, sdl, );
1843         CASE(SPICE, spice, );
1844         CASE(WAV, wav, );
1845
1846     case AUDIODEV_DRIVER__MAX:
1847         abort();
1848     };
1849 }
1850
1851 static void audio_validate_per_direction_opts(
1852     AudiodevPerDirectionOptions *pdo, Error **errp)
1853 {
1854     if (!pdo->has_fixed_settings) {
1855         pdo->has_fixed_settings = true;
1856         pdo->fixed_settings = true;
1857     }
1858     if (!pdo->fixed_settings &&
1859         (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
1860         error_setg(errp,
1861                    "You can't use frequency, channels or format with fixed-settings=off");
1862         return;
1863     }
1864
1865     if (!pdo->has_frequency) {
1866         pdo->has_frequency = true;
1867         pdo->frequency = 44100;
1868     }
1869     if (!pdo->has_channels) {
1870         pdo->has_channels = true;
1871         pdo->channels = 2;
1872     }
1873     if (!pdo->has_voices) {
1874         pdo->has_voices = true;
1875         pdo->voices = 1;
1876     }
1877     if (!pdo->has_format) {
1878         pdo->has_format = true;
1879         pdo->format = AUDIO_FORMAT_S16;
1880     }
1881 }
1882
1883 static void audio_validate_opts(Audiodev *dev, Error **errp)
1884 {
1885     Error *err = NULL;
1886
1887     audio_create_pdos(dev);
1888
1889     audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
1890     if (err) {
1891         error_propagate(errp, err);
1892         return;
1893     }
1894
1895     audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
1896     if (err) {
1897         error_propagate(errp, err);
1898         return;
1899     }
1900
1901     if (!dev->has_timer_period) {
1902         dev->has_timer_period = true;
1903         dev->timer_period = 10000; /* 100Hz -> 10ms */
1904     }
1905 }
1906
1907 void audio_parse_option(const char *opt)
1908 {
1909     AudiodevListEntry *e;
1910     Audiodev *dev = NULL;
1911
1912     Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
1913     visit_type_Audiodev(v, NULL, &dev, &error_fatal);
1914     visit_free(v);
1915
1916     audio_validate_opts(dev, &error_fatal);
1917
1918     e = g_malloc0(sizeof(AudiodevListEntry));
1919     e->dev = dev;
1920     QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
1921 }
1922
1923 void audio_init_audiodevs(void)
1924 {
1925     AudiodevListEntry *e;
1926
1927     QSIMPLEQ_FOREACH(e, &audiodevs, next) {
1928         audio_init(e->dev);
1929     }
1930 }
1931
1932 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
1933 {
1934     return (audsettings) {
1935         .freq = pdo->frequency,
1936         .nchannels = pdo->channels,
1937         .fmt = pdo->format,
1938         .endianness = AUDIO_HOST_ENDIANNESS,
1939     };
1940 }
1941
1942 int audioformat_bytes_per_sample(AudioFormat fmt)
1943 {
1944     switch (fmt) {
1945     case AUDIO_FORMAT_U8:
1946     case AUDIO_FORMAT_S8:
1947         return 1;
1948
1949     case AUDIO_FORMAT_U16:
1950     case AUDIO_FORMAT_S16:
1951         return 2;
1952
1953     case AUDIO_FORMAT_U32:
1954     case AUDIO_FORMAT_S32:
1955         return 4;
1956
1957     case AUDIO_FORMAT__MAX:
1958         ;
1959     }
1960     abort();
1961 }
1962
1963
1964 /* frames = freq * usec / 1e6 */
1965 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
1966                         audsettings *as, int def_usecs)
1967 {
1968     uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
1969     return (as->freq * usecs + 500000) / 1000000;
1970 }
1971
1972 /* samples = channels * frames = channels * freq * usec / 1e6 */
1973 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
1974                          audsettings *as, int def_usecs)
1975 {
1976     return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
1977 }
1978
1979 /*
1980  * bytes = bytes_per_sample * samples =
1981  *     bytes_per_sample * channels * freq * usec / 1e6
1982  */
1983 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
1984                        audsettings *as, int def_usecs)
1985 {
1986     return audio_buffer_samples(pdo, as, def_usecs) *
1987         audioformat_bytes_per_sample(as->fmt);
1988 }