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 "hw/hw.h"
  25 #include "audio.h"
  26 #include "monitor/monitor.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 #define AUDIO_CAP "audio"
  31 #include "audio_int.h"
  32
  33 /* #define DEBUG_PLIVE */
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37 /* #define DEBUG_POLL */
  38
  39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  40
  41
  42 /* Order of CONFIG_AUDIO_DRIVERS is import.
  43    The 1st one is the one used by default, that is the reason
  44     that we generate the list.
  45 */
  46 static struct audio_driver *drvtab[] = {
  47 #ifdef CONFIG_SPICE
  48     &spice_audio_driver,
  49 #endif
  50     CONFIG_AUDIO_DRIVERS
  51     &no_audio_driver,
  52     &wav_audio_driver
  53 };
  54
  55 struct fixed_settings {
  56     int enabled;
  57     int nb_voices;
  58     int greedy;
  59     struct audsettings settings;
  60 };
  61
  62 static struct {
  63     struct fixed_settings fixed_out;
  64     struct fixed_settings fixed_in;
  65     union {
  66         int hertz;
  67         int64_t ticks;
  68     } period;
  69     int plive;
  70     int log_to_monitor;
  71     int try_poll_in;
  72     int try_poll_out;
  73 } conf = {
  74     .fixed_out = { /* DAC fixed settings */
  75         .enabled = 1,
  76         .nb_voices = 1,
  77         .greedy = 1,
  78         .settings = {
  79             .freq = 44100,
  80             .nchannels = 2,
  81             .fmt = AUD_FMT_S16,
  82             .endianness =  AUDIO_HOST_ENDIANNESS,
  83         }
  84     },
  85
  86     .fixed_in = { /* ADC fixed settings */
  87         .enabled = 1,
  88         .nb_voices = 1,
  89         .greedy = 1,
  90         .settings = {
  91             .freq = 44100,
  92             .nchannels = 2,
  93             .fmt = AUD_FMT_S16,
  94             .endianness = AUDIO_HOST_ENDIANNESS,
  95         }
  96     },
  97
  98     .period = { .hertz = 250 },
  99     .plive = 0,
 100     .log_to_monitor = 0,
 101     .try_poll_in = 1,
 102     .try_poll_out = 1,
 103 };
 104
 105 static AudioState glob_audio_state;
 106
 107 const struct mixeng_volume nominal_volume = {
 108     .mute = 0,
 109 #ifdef FLOAT_MIXENG
 110     .r = 1.0,
 111     .l = 1.0,
 112 #else
 113     .r = 1ULL << 32,
 114     .l = 1ULL << 32,
 115 #endif
 116 };
 117
 118 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 119 #error No its not
 120 #else
 121 static void audio_print_options (const char *prefix,
 122                                  struct audio_option *opt);
 123
 124 int audio_bug (const char *funcname, int cond)
 125 {
 126     if (cond) {
 127         static int shown;
 128
 129         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 130         if (!shown) {
 131             struct audio_driver *d;
 132
 133             shown = 1;
 134             AUD_log (NULL, "Save all your work and restart without audio\n");
 135             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 136             AUD_log (NULL, "I am sorry\n");
 137             d = glob_audio_state.drv;
 138             if (d) {
 139                 audio_print_options (d->name, d->options);
 140             }
 141         }
 142         AUD_log (NULL, "Context:\n");
 143
 144 #if defined AUDIO_BREAKPOINT_ON_BUG
 145 #  if defined HOST_I386
 146 #    if defined __GNUC__
 147         __asm__ ("int3");
 148 #    elif defined _MSC_VER
 149         _asm _emit 0xcc;
 150 #    else
 151         abort ();
 152 #    endif
 153 #  else
 154         abort ();
 155 #  endif
 156 #endif
 157     }
 158
 159     return cond;
 160 }
 161 #endif
 162
 163 static inline int audio_bits_to_index (int bits)
 164 {
 165     switch (bits) {
 166     case 8:
 167         return 0;
 168
 169     case 16:
 170         return 1;
 171
 172     case 32:
 173         return 2;
 174
 175     default:
 176         audio_bug ("bits_to_index", 1);
 177         AUD_log (NULL, "invalid bits %d\n", bits);
 178         return 0;
 179     }
 180 }
 181
 182 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 183 {
 184     int cond;
 185     size_t len;
 186
 187     len = nmemb * size;
 188     cond = !nmemb || !size;
 189     cond |= nmemb < 0;
 190     cond |= len < size;
 191
 192     if (audio_bug ("audio_calloc", cond)) {
 193         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 194                  funcname);
 195         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 196         return NULL;
 197     }
 198
 199     return g_malloc0 (len);
 200 }
 201
 202 static char *audio_alloc_prefix (const char *s)
 203 {
 204     const char qemu_prefix[] = "QEMU_";
 205     size_t len, i;
 206     char *r, *u;
 207
 208     if (!s) {
 209         return NULL;
 210     }
 211
 212     len = strlen (s);
 213     r = g_malloc (len + sizeof (qemu_prefix));
 214
 215     u = r + sizeof (qemu_prefix) - 1;
 216
 217     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 218     pstrcat (r, len + sizeof (qemu_prefix), s);
 219
 220     for (i = 0; i < len; ++i) {
 221         u[i] = qemu_toupper(u[i]);
 222     }
 223
 224     return r;
 225 }
 226
 227 static const char *audio_audfmt_to_string (audfmt_e fmt)
 228 {
 229     switch (fmt) {
 230     case AUD_FMT_U8:
 231         return "U8";
 232
 233     case AUD_FMT_U16:
 234         return "U16";
 235
 236     case AUD_FMT_S8:
 237         return "S8";
 238
 239     case AUD_FMT_S16:
 240         return "S16";
 241
 242     case AUD_FMT_U32:
 243         return "U32";
 244
 245     case AUD_FMT_S32:
 246         return "S32";
 247     }
 248
 249     dolog ("Bogus audfmt %d returning S16\n", fmt);
 250     return "S16";
 251 }
 252
 253 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 254                                         int *defaultp)
 255 {
 256     if (!strcasecmp (s, "u8")) {
 257         *defaultp = 0;
 258         return AUD_FMT_U8;
 259     }
 260     else if (!strcasecmp (s, "u16")) {
 261         *defaultp = 0;
 262         return AUD_FMT_U16;
 263     }
 264     else if (!strcasecmp (s, "u32")) {
 265         *defaultp = 0;
 266         return AUD_FMT_U32;
 267     }
 268     else if (!strcasecmp (s, "s8")) {
 269         *defaultp = 0;
 270         return AUD_FMT_S8;
 271     }
 272     else if (!strcasecmp (s, "s16")) {
 273         *defaultp = 0;
 274         return AUD_FMT_S16;
 275     }
 276     else if (!strcasecmp (s, "s32")) {
 277         *defaultp = 0;
 278         return AUD_FMT_S32;
 279     }
 280     else {
 281         dolog ("Bogus audio format `%s' using %s\n",
 282                s, audio_audfmt_to_string (defval));
 283         *defaultp = 1;
 284         return defval;
 285     }
 286 }
 287
 288 static audfmt_e audio_get_conf_fmt (const char *envname,
 289                                     audfmt_e defval,
 290                                     int *defaultp)
 291 {
 292     const char *var = getenv (envname);
 293     if (!var) {
 294         *defaultp = 1;
 295         return defval;
 296     }
 297     return audio_string_to_audfmt (var, defval, defaultp);
 298 }
 299
 300 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 301 {
 302     int val;
 303     char *strval;
 304
 305     strval = getenv (key);
 306     if (strval) {
 307         *defaultp = 0;
 308         val = atoi (strval);
 309         return val;
 310     }
 311     else {
 312         *defaultp = 1;
 313         return defval;
 314     }
 315 }
 316
 317 static const char *audio_get_conf_str (const char *key,
 318                                        const char *defval,
 319                                        int *defaultp)
 320 {
 321     const char *val = getenv (key);
 322     if (!val) {
 323         *defaultp = 1;
 324         return defval;
 325     }
 326     else {
 327         *defaultp = 0;
 328         return val;
 329     }
 330 }
 331
 332 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 333 {
 334     if (conf.log_to_monitor) {
 335         if (cap) {
 336             monitor_printf(default_mon, "%s: ", cap);
 337         }
 338
 339         monitor_vprintf(default_mon, fmt, ap);
 340     }
 341     else {
 342         if (cap) {
 343             fprintf (stderr, "%s: ", cap);
 344         }
 345
 346         vfprintf (stderr, fmt, ap);
 347     }
 348 }
 349
 350 void AUD_log (const char *cap, const char *fmt, ...)
 351 {
 352     va_list ap;
 353
 354     va_start (ap, fmt);
 355     AUD_vlog (cap, fmt, ap);
 356     va_end (ap);
 357 }
 358
 359 static void audio_print_options (const char *prefix,
 360                                  struct audio_option *opt)
 361 {
 362     char *uprefix;
 363
 364     if (!prefix) {
 365         dolog ("No prefix specified\n");
 366         return;
 367     }
 368
 369     if (!opt) {
 370         dolog ("No options\n");
 371         return;
 372     }
 373
 374     uprefix = audio_alloc_prefix (prefix);
 375
 376     for (; opt->name; opt++) {
 377         const char *state = "default";
 378         printf ("  %s_%s: ", uprefix, opt->name);
 379
 380         if (opt->overriddenp && *opt->overriddenp) {
 381             state = "current";
 382         }
 383
 384         switch (opt->tag) {
 385         case AUD_OPT_BOOL:
 386             {
 387                 int *intp = opt->valp;
 388                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 389             }
 390             break;
 391
 392         case AUD_OPT_INT:
 393             {
 394                 int *intp = opt->valp;
 395                 printf ("integer, %s = %d\n", state, *intp);
 396             }
 397             break;
 398
 399         case AUD_OPT_FMT:
 400             {
 401                 audfmt_e *fmtp = opt->valp;
 402                 printf (
 403                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 404                     state,
 405                     audio_audfmt_to_string (*fmtp)
 406                     );
 407             }
 408             break;
 409
 410         case AUD_OPT_STR:
 411             {
 412                 const char **strp = opt->valp;
 413                 printf ("string, %s = %s\n",
 414                         state,
 415                         *strp ? *strp : "(not set)");
 416             }
 417             break;
 418
 419         default:
 420             printf ("???\n");
 421             dolog ("Bad value tag for option %s_%s %d\n",
 422                    uprefix, opt->name, opt->tag);
 423             break;
 424         }
 425         printf ("    %s\n", opt->descr);
 426     }
 427
 428     g_free (uprefix);
 429 }
 430
 431 static void audio_process_options (const char *prefix,
 432                                    struct audio_option *opt)
 433 {
 434     char *optname;
 435     const char qemu_prefix[] = "QEMU_";
 436     size_t preflen, optlen;
 437
 438     if (audio_bug (AUDIO_FUNC, !prefix)) {
 439         dolog ("prefix = NULL\n");
 440         return;
 441     }
 442
 443     if (audio_bug (AUDIO_FUNC, !opt)) {
 444         dolog ("opt = NULL\n");
 445         return;
 446     }
 447
 448     preflen = strlen (prefix);
 449
 450     for (; opt->name; opt++) {
 451         size_t len, i;
 452         int def;
 453
 454         if (!opt->valp) {
 455             dolog ("Option value pointer for `%s' is not set\n",
 456                    opt->name);
 457             continue;
 458         }
 459
 460         len = strlen (opt->name);
 461         /* len of opt->name + len of prefix + size of qemu_prefix
 462          * (includes trailing zero) + zero + underscore (on behalf of
 463          * sizeof) */
 464         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 465         optname = g_malloc (optlen);
 466
 467         pstrcpy (optname, optlen, qemu_prefix);
 468
 469         /* copy while upper-casing, including trailing zero */
 470         for (i = 0; i <= preflen; ++i) {
 471             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 472         }
 473         pstrcat (optname, optlen, "_");
 474         pstrcat (optname, optlen, opt->name);
 475
 476         def = 1;
 477         switch (opt->tag) {
 478         case AUD_OPT_BOOL:
 479         case AUD_OPT_INT:
 480             {
 481                 int *intp = opt->valp;
 482                 *intp = audio_get_conf_int (optname, *intp, &def);
 483             }
 484             break;
 485
 486         case AUD_OPT_FMT:
 487             {
 488                 audfmt_e *fmtp = opt->valp;
 489                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 490             }
 491             break;
 492
 493         case AUD_OPT_STR:
 494             {
 495                 const char **strp = opt->valp;
 496                 *strp = audio_get_conf_str (optname, *strp, &def);
 497             }
 498             break;
 499
 500         default:
 501             dolog ("Bad value tag for option `%s' - %d\n",
 502                    optname, opt->tag);
 503             break;
 504         }
 505
 506         if (!opt->overriddenp) {
 507             opt->overriddenp = &opt->overridden;
 508         }
 509         *opt->overriddenp = !def;
 510         g_free (optname);
 511     }
 512 }
 513
 514 static void audio_print_settings (struct audsettings *as)
 515 {
 516     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 517
 518     switch (as->fmt) {
 519     case AUD_FMT_S8:
 520         AUD_log (NULL, "S8");
 521         break;
 522     case AUD_FMT_U8:
 523         AUD_log (NULL, "U8");
 524         break;
 525     case AUD_FMT_S16:
 526         AUD_log (NULL, "S16");
 527         break;
 528     case AUD_FMT_U16:
 529         AUD_log (NULL, "U16");
 530         break;
 531     case AUD_FMT_S32:
 532         AUD_log (NULL, "S32");
 533         break;
 534     case AUD_FMT_U32:
 535         AUD_log (NULL, "U32");
 536         break;
 537     default:
 538         AUD_log (NULL, "invalid(%d)", as->fmt);
 539         break;
 540     }
 541
 542     AUD_log (NULL, " endianness=");
 543     switch (as->endianness) {
 544     case 0:
 545         AUD_log (NULL, "little");
 546         break;
 547     case 1:
 548         AUD_log (NULL, "big");
 549         break;
 550     default:
 551         AUD_log (NULL, "invalid");
 552         break;
 553     }
 554     AUD_log (NULL, "\n");
 555 }
 556
 557 static int audio_validate_settings (struct audsettings *as)
 558 {
 559     int invalid;
 560
 561     invalid = as->nchannels != 1 && as->nchannels != 2;
 562     invalid |= as->endianness != 0 && as->endianness != 1;
 563
 564     switch (as->fmt) {
 565     case AUD_FMT_S8:
 566     case AUD_FMT_U8:
 567     case AUD_FMT_S16:
 568     case AUD_FMT_U16:
 569     case AUD_FMT_S32:
 570     case AUD_FMT_U32:
 571         break;
 572     default:
 573         invalid = 1;
 574         break;
 575     }
 576
 577     invalid |= as->freq <= 0;
 578     return invalid ? -1 : 0;
 579 }
 580
 581 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 582 {
 583     int bits = 8, sign = 0;
 584
 585     switch (as->fmt) {
 586     case AUD_FMT_S8:
 587         sign = 1;
 588         /* fall through */
 589     case AUD_FMT_U8:
 590         break;
 591
 592     case AUD_FMT_S16:
 593         sign = 1;
 594         /* fall through */
 595     case AUD_FMT_U16:
 596         bits = 16;
 597         break;
 598
 599     case AUD_FMT_S32:
 600         sign = 1;
 601         /* fall through */
 602     case AUD_FMT_U32:
 603         bits = 32;
 604         break;
 605     }
 606     return info->freq == as->freq
 607         && info->nchannels == as->nchannels
 608         && info->sign == sign
 609         && info->bits == bits
 610         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 611 }
 612
 613 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 614 {
 615     int bits = 8, sign = 0, shift = 0;
 616
 617     switch (as->fmt) {
 618     case AUD_FMT_S8:
 619         sign = 1;
 620     case AUD_FMT_U8:
 621         break;
 622
 623     case AUD_FMT_S16:
 624         sign = 1;
 625     case AUD_FMT_U16:
 626         bits = 16;
 627         shift = 1;
 628         break;
 629
 630     case AUD_FMT_S32:
 631         sign = 1;
 632     case AUD_FMT_U32:
 633         bits = 32;
 634         shift = 2;
 635         break;
 636     }
 637
 638     info->freq = as->freq;
 639     info->bits = bits;
 640     info->sign = sign;
 641     info->nchannels = as->nchannels;
 642     info->shift = (as->nchannels == 2) + shift;
 643     info->align = (1 << info->shift) - 1;
 644     info->bytes_per_second = info->freq << info->shift;
 645     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 646 }
 647
 648 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 649 {
 650     if (!len) {
 651         return;
 652     }
 653
 654     if (info->sign) {
 655         memset (buf, 0x00, len << info->shift);
 656     }
 657     else {
 658         switch (info->bits) {
 659         case 8:
 660             memset (buf, 0x80, len << info->shift);
 661             break;
 662
 663         case 16:
 664             {
 665                 int i;
 666                 uint16_t *p = buf;
 667                 int shift = info->nchannels - 1;
 668                 short s = INT16_MAX;
 669
 670                 if (info->swap_endianness) {
 671                     s = bswap16 (s);
 672                 }
 673
 674                 for (i = 0; i < len << shift; i++) {
 675                     p[i] = s;
 676                 }
 677             }
 678             break;
 679
 680         case 32:
 681             {
 682                 int i;
 683                 uint32_t *p = buf;
 684                 int shift = info->nchannels - 1;
 685                 int32_t s = INT32_MAX;
 686
 687                 if (info->swap_endianness) {
 688                     s = bswap32 (s);
 689                 }
 690
 691                 for (i = 0; i < len << shift; i++) {
 692                     p[i] = s;
 693                 }
 694             }
 695             break;
 696
 697         default:
 698             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 699                      info->bits);
 700             break;
 701         }
 702     }
 703 }
 704
 705 /*
 706  * Capture
 707  */
 708 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 709 {
 710     (void) src;
 711     (void) dst;
 712     (void) samples;
 713 }
 714
 715 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 716     struct audsettings *as
 717     )
 718 {
 719     CaptureVoiceOut *cap;
 720     AudioState *s = &glob_audio_state;
 721
 722     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 723         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 724             return cap;
 725         }
 726     }
 727     return NULL;
 728 }
 729
 730 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 731 {
 732     struct capture_callback *cb;
 733
 734 #ifdef DEBUG_CAPTURE
 735     dolog ("notification %d sent\n", cmd);
 736 #endif
 737     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 738         cb->ops.notify (cb->opaque, cmd);
 739     }
 740 }
 741
 742 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 743 {
 744     if (cap->hw.enabled != enabled) {
 745         audcnotification_e cmd;
 746         cap->hw.enabled = enabled;
 747         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 748         audio_notify_capture (cap, cmd);
 749     }
 750 }
 751
 752 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 753 {
 754     HWVoiceOut *hw = &cap->hw;
 755     SWVoiceOut *sw;
 756     int enabled = 0;
 757
 758     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 759         if (sw->active) {
 760             enabled = 1;
 761             break;
 762         }
 763     }
 764     audio_capture_maybe_changed (cap, enabled);
 765 }
 766
 767 static void audio_detach_capture (HWVoiceOut *hw)
 768 {
 769     SWVoiceCap *sc = hw->cap_head.lh_first;
 770
 771     while (sc) {
 772         SWVoiceCap *sc1 = sc->entries.le_next;
 773         SWVoiceOut *sw = &sc->sw;
 774         CaptureVoiceOut *cap = sc->cap;
 775         int was_active = sw->active;
 776
 777         if (sw->rate) {
 778             st_rate_stop (sw->rate);
 779             sw->rate = NULL;
 780         }
 781
 782         QLIST_REMOVE (sw, entries);
 783         QLIST_REMOVE (sc, entries);
 784         g_free (sc);
 785         if (was_active) {
 786             /* We have removed soft voice from the capture:
 787                this might have changed the overall status of the capture
 788                since this might have been the only active voice */
 789             audio_recalc_and_notify_capture (cap);
 790         }
 791         sc = sc1;
 792     }
 793 }
 794
 795 static int audio_attach_capture (HWVoiceOut *hw)
 796 {
 797     AudioState *s = &glob_audio_state;
 798     CaptureVoiceOut *cap;
 799
 800     audio_detach_capture (hw);
 801     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 802         SWVoiceCap *sc;
 803         SWVoiceOut *sw;
 804         HWVoiceOut *hw_cap = &cap->hw;
 805
 806         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 807         if (!sc) {
 808             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 809                    sizeof (*sc));
 810             return -1;
 811         }
 812
 813         sc->cap = cap;
 814         sw = &sc->sw;
 815         sw->hw = hw_cap;
 816         sw->info = hw->info;
 817         sw->empty = 1;
 818         sw->active = hw->enabled;
 819         sw->conv = noop_conv;
 820         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 821         sw->vol = nominal_volume;
 822         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 823         if (!sw->rate) {
 824             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 825             g_free (sw);
 826             return -1;
 827         }
 828         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 829         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 830 #ifdef DEBUG_CAPTURE
 831         asprintf (&sw->name, "for %p %d,%d,%d",
 832                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 833         dolog ("Added %s active = %d\n", sw->name, sw->active);
 834 #endif
 835         if (sw->active) {
 836             audio_capture_maybe_changed (cap, 1);
 837         }
 838     }
 839     return 0;
 840 }
 841
 842 /*
 843  * Hard voice (capture)
 844  */
 845 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 846 {
 847     SWVoiceIn *sw;
 848     int m = hw->total_samples_captured;
 849
 850     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 851         if (sw->active) {
 852             m = audio_MIN (m, sw->total_hw_samples_acquired);
 853         }
 854     }
 855     return m;
 856 }
 857
 858 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 859 {
 860     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 861     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 862         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 863         return 0;
 864     }
 865     return live;
 866 }
 867
 868 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 869                            int live, int pending)
 870 {
 871     int left = hw->samples - pending;
 872     int len = audio_MIN (left, live);
 873     int clipped = 0;
 874
 875     while (len) {
 876         struct st_sample *src = hw->mix_buf + hw->rpos;
 877         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 878         int samples_till_end_of_buf = hw->samples - hw->rpos;
 879         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 880
 881         hw->clip (dst, src, samples_to_clip);
 882
 883         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 884         len -= samples_to_clip;
 885         clipped += samples_to_clip;
 886     }
 887     return clipped;
 888 }
 889
 890 /*
 891  * Soft voice (capture)
 892  */
 893 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 894 {
 895     HWVoiceIn *hw = sw->hw;
 896     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 897     int rpos;
 898
 899     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 900         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 901         return 0;
 902     }
 903
 904     rpos = hw->wpos - live;
 905     if (rpos >= 0) {
 906         return rpos;
 907     }
 908     else {
 909         return hw->samples + rpos;
 910     }
 911 }
 912
 913 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 914 {
 915     HWVoiceIn *hw = sw->hw;
 916     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 917     struct st_sample *src, *dst = sw->buf;
 918
 919     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 920
 921     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 922     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 923         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 924         return 0;
 925     }
 926
 927     samples = size >> sw->info.shift;
 928     if (!live) {
 929         return 0;
 930     }
 931
 932     swlim = (live * sw->ratio) >> 32;
 933     swlim = audio_MIN (swlim, samples);
 934
 935     while (swlim) {
 936         src = hw->conv_buf + rpos;
 937         isamp = hw->wpos - rpos;
 938         /* XXX: <= ? */
 939         if (isamp <= 0) {
 940             isamp = hw->samples - rpos;
 941         }
 942
 943         if (!isamp) {
 944             break;
 945         }
 946         osamp = swlim;
 947
 948         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 949             dolog ("osamp=%d\n", osamp);
 950             return 0;
 951         }
 952
 953         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 954         swlim -= osamp;
 955         rpos = (rpos + isamp) % hw->samples;
 956         dst += osamp;
 957         ret += osamp;
 958         total += isamp;
 959     }
 960
 961     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 962         mixeng_volume (sw->buf, ret, &sw->vol);
 963     }
 964
 965     sw->clip (buf, sw->buf, ret);
 966     sw->total_hw_samples_acquired += total;
 967     return ret << sw->info.shift;
 968 }
 969
 970 /*
 971  * Hard voice (playback)
 972  */
 973 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 974 {
 975     SWVoiceOut *sw;
 976     int m = INT_MAX;
 977     int nb_live = 0;
 978
 979     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 980         if (sw->active || !sw->empty) {
 981             m = audio_MIN (m, sw->total_hw_samples_mixed);
 982             nb_live += 1;
 983         }
 984     }
 985
 986     *nb_livep = nb_live;
 987     return m;
 988 }
 989
 990 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 991 {
 992     int smin;
 993     int nb_live1;
 994
 995     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 996     if (nb_live) {
 997         *nb_live = nb_live1;
 998     }
 999
1000     if (nb_live1) {
1001         int live = smin;
1002
1003         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1004             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1005             return 0;
1006         }
1007         return live;
1008     }
1009     return 0;
1010 }
1011
1012 /*
1013  * Soft voice (playback)
1014  */
1015 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1016 {
1017     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1018     int ret = 0, pos = 0, total = 0;
1019
1020     if (!sw) {
1021         return size;
1022     }
1023
1024     hwsamples = sw->hw->samples;
1025
1026     live = sw->total_hw_samples_mixed;
1027     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1028         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1029         return 0;
1030     }
1031
1032     if (live == hwsamples) {
1033 #ifdef DEBUG_OUT
1034         dolog ("%s is full %d\n", sw->name, live);
1035 #endif
1036         return 0;
1037     }
1038
1039     wpos = (sw->hw->rpos + live) % hwsamples;
1040     samples = size >> sw->info.shift;
1041
1042     dead = hwsamples - live;
1043     swlim = ((int64_t) dead << 32) / sw->ratio;
1044     swlim = audio_MIN (swlim, samples);
1045     if (swlim) {
1046         sw->conv (sw->buf, buf, swlim);
1047
1048         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1049             mixeng_volume (sw->buf, swlim, &sw->vol);
1050         }
1051     }
1052
1053     while (swlim) {
1054         dead = hwsamples - live;
1055         left = hwsamples - wpos;
1056         blck = audio_MIN (dead, left);
1057         if (!blck) {
1058             break;
1059         }
1060         isamp = swlim;
1061         osamp = blck;
1062         st_rate_flow_mix (
1063             sw->rate,
1064             sw->buf + pos,
1065             sw->hw->mix_buf + wpos,
1066             &isamp,
1067             &osamp
1068             );
1069         ret += isamp;
1070         swlim -= isamp;
1071         pos += isamp;
1072         live += osamp;
1073         wpos = (wpos + osamp) % hwsamples;
1074         total += osamp;
1075     }
1076
1077     sw->total_hw_samples_mixed += total;
1078     sw->empty = sw->total_hw_samples_mixed == 0;
1079
1080 #ifdef DEBUG_OUT
1081     dolog (
1082         "%s: write size %d ret %d total sw %d\n",
1083         SW_NAME (sw),
1084         size >> sw->info.shift,
1085         ret,
1086         sw->total_hw_samples_mixed
1087         );
1088 #endif
1089
1090     return ret << sw->info.shift;
1091 }
1092
1093 #ifdef DEBUG_AUDIO
1094 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1095 {
1096     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1097            cap, info->bits, info->sign, info->freq, info->nchannels);
1098 }
1099 #endif
1100
1101 #define DAC
1102 #include "audio_template.h"
1103 #undef DAC
1104 #include "audio_template.h"
1105
1106 /*
1107  * Timer
1108  */
1109 static int audio_is_timer_needed (void)
1110 {
1111     HWVoiceIn *hwi = NULL;
1112     HWVoiceOut *hwo = NULL;
1113
1114     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1115         if (!hwo->poll_mode) return 1;
1116     }
1117     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1118         if (!hwi->poll_mode) return 1;
1119     }
1120     return 0;
1121 }
1122
1123 static void audio_reset_timer (AudioState *s)
1124 {
1125     if (audio_is_timer_needed ()) {
1126         qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1127     }
1128     else {
1129         qemu_del_timer (s->ts);
1130     }
1131 }
1132
1133 static void audio_timer (void *opaque)
1134 {
1135     audio_run ("timer");
1136     audio_reset_timer (opaque);
1137 }
1138
1139 /*
1140  * Public API
1141  */
1142 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1143 {
1144     int bytes;
1145
1146     if (!sw) {
1147         /* XXX: Consider options */
1148         return size;
1149     }
1150
1151     if (!sw->hw->enabled) {
1152         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1153         return 0;
1154     }
1155
1156     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1157     return bytes;
1158 }
1159
1160 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1161 {
1162     int bytes;
1163
1164     if (!sw) {
1165         /* XXX: Consider options */
1166         return size;
1167     }
1168
1169     if (!sw->hw->enabled) {
1170         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1171         return 0;
1172     }
1173
1174     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1175     return bytes;
1176 }
1177
1178 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1179 {
1180     return sw->hw->samples << sw->hw->info.shift;
1181 }
1182
1183 void AUD_set_active_out (SWVoiceOut *sw, int on)
1184 {
1185     HWVoiceOut *hw;
1186
1187     if (!sw) {
1188         return;
1189     }
1190
1191     hw = sw->hw;
1192     if (sw->active != on) {
1193         AudioState *s = &glob_audio_state;
1194         SWVoiceOut *temp_sw;
1195         SWVoiceCap *sc;
1196
1197         if (on) {
1198             hw->pending_disable = 0;
1199             if (!hw->enabled) {
1200                 hw->enabled = 1;
1201                 if (s->vm_running) {
1202                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1203                     audio_reset_timer (s);
1204                 }
1205             }
1206         }
1207         else {
1208             if (hw->enabled) {
1209                 int nb_active = 0;
1210
1211                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1212                      temp_sw = temp_sw->entries.le_next) {
1213                     nb_active += temp_sw->active != 0;
1214                 }
1215
1216                 hw->pending_disable = nb_active == 1;
1217             }
1218         }
1219
1220         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1221             sc->sw.active = hw->enabled;
1222             if (hw->enabled) {
1223                 audio_capture_maybe_changed (sc->cap, 1);
1224             }
1225         }
1226         sw->active = on;
1227     }
1228 }
1229
1230 void AUD_set_active_in (SWVoiceIn *sw, int on)
1231 {
1232     HWVoiceIn *hw;
1233
1234     if (!sw) {
1235         return;
1236     }
1237
1238     hw = sw->hw;
1239     if (sw->active != on) {
1240         AudioState *s = &glob_audio_state;
1241         SWVoiceIn *temp_sw;
1242
1243         if (on) {
1244             if (!hw->enabled) {
1245                 hw->enabled = 1;
1246                 if (s->vm_running) {
1247                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1248                     audio_reset_timer (s);
1249                 }
1250             }
1251             sw->total_hw_samples_acquired = hw->total_samples_captured;
1252         }
1253         else {
1254             if (hw->enabled) {
1255                 int nb_active = 0;
1256
1257                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1258                      temp_sw = temp_sw->entries.le_next) {
1259                     nb_active += temp_sw->active != 0;
1260                 }
1261
1262                 if (nb_active == 1) {
1263                     hw->enabled = 0;
1264                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1265                 }
1266             }
1267         }
1268         sw->active = on;
1269     }
1270 }
1271
1272 static int audio_get_avail (SWVoiceIn *sw)
1273 {
1274     int live;
1275
1276     if (!sw) {
1277         return 0;
1278     }
1279
1280     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1281     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1282         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1283         return 0;
1284     }
1285
1286     ldebug (
1287         "%s: get_avail live %d ret %" PRId64 "\n",
1288         SW_NAME (sw),
1289         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1290         );
1291
1292     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1293 }
1294
1295 static int audio_get_free (SWVoiceOut *sw)
1296 {
1297     int live, dead;
1298
1299     if (!sw) {
1300         return 0;
1301     }
1302
1303     live = sw->total_hw_samples_mixed;
1304
1305     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1306         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1307         return 0;
1308     }
1309
1310     dead = sw->hw->samples - live;
1311
1312 #ifdef DEBUG_OUT
1313     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1314            SW_NAME (sw),
1315            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1316 #endif
1317
1318     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1319 }
1320
1321 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1322 {
1323     int n;
1324
1325     if (hw->enabled) {
1326         SWVoiceCap *sc;
1327
1328         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1329             SWVoiceOut *sw = &sc->sw;
1330             int rpos2 = rpos;
1331
1332             n = samples;
1333             while (n) {
1334                 int till_end_of_hw = hw->samples - rpos2;
1335                 int to_write = audio_MIN (till_end_of_hw, n);
1336                 int bytes = to_write << hw->info.shift;
1337                 int written;
1338
1339                 sw->buf = hw->mix_buf + rpos2;
1340                 written = audio_pcm_sw_write (sw, NULL, bytes);
1341                 if (written - bytes) {
1342                     dolog ("Could not mix %d bytes into a capture "
1343                            "buffer, mixed %d\n",
1344                            bytes, written);
1345                     break;
1346                 }
1347                 n -= to_write;
1348                 rpos2 = (rpos2 + to_write) % hw->samples;
1349             }
1350         }
1351     }
1352
1353     n = audio_MIN (samples, hw->samples - rpos);
1354     mixeng_clear (hw->mix_buf + rpos, n);
1355     mixeng_clear (hw->mix_buf, samples - n);
1356 }
1357
1358 static void audio_run_out (AudioState *s)
1359 {
1360     HWVoiceOut *hw = NULL;
1361     SWVoiceOut *sw;
1362
1363     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1364         int played;
1365         int live, free, nb_live, cleanup_required, prev_rpos;
1366
1367         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1368         if (!nb_live) {
1369             live = 0;
1370         }
1371
1372         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1373             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1374             continue;
1375         }
1376
1377         if (hw->pending_disable && !nb_live) {
1378             SWVoiceCap *sc;
1379 #ifdef DEBUG_OUT
1380             dolog ("Disabling voice\n");
1381 #endif
1382             hw->enabled = 0;
1383             hw->pending_disable = 0;
1384             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1385             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1386                 sc->sw.active = 0;
1387                 audio_recalc_and_notify_capture (sc->cap);
1388             }
1389             continue;
1390         }
1391
1392         if (!live) {
1393             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1394                 if (sw->active) {
1395                     free = audio_get_free (sw);
1396                     if (free > 0) {
1397                         sw->callback.fn (sw->callback.opaque, free);
1398                     }
1399                 }
1400             }
1401             continue;
1402         }
1403
1404         prev_rpos = hw->rpos;
1405         played = hw->pcm_ops->run_out (hw, live);
1406         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1407             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1408                    hw->rpos, hw->samples, played);
1409             hw->rpos = 0;
1410         }
1411
1412 #ifdef DEBUG_OUT
1413         dolog ("played=%d\n", played);
1414 #endif
1415
1416         if (played) {
1417             hw->ts_helper += played;
1418             audio_capture_mix_and_clear (hw, prev_rpos, played);
1419         }
1420
1421         cleanup_required = 0;
1422         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1423             if (!sw->active && sw->empty) {
1424                 continue;
1425             }
1426
1427             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1428                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1429                        played, sw->total_hw_samples_mixed);
1430                 played = sw->total_hw_samples_mixed;
1431             }
1432
1433             sw->total_hw_samples_mixed -= played;
1434
1435             if (!sw->total_hw_samples_mixed) {
1436                 sw->empty = 1;
1437                 cleanup_required |= !sw->active && !sw->callback.fn;
1438             }
1439
1440             if (sw->active) {
1441                 free = audio_get_free (sw);
1442                 if (free > 0) {
1443                     sw->callback.fn (sw->callback.opaque, free);
1444                 }
1445             }
1446         }
1447
1448         if (cleanup_required) {
1449             SWVoiceOut *sw1;
1450
1451             sw = hw->sw_head.lh_first;
1452             while (sw) {
1453                 sw1 = sw->entries.le_next;
1454                 if (!sw->active && !sw->callback.fn) {
1455 #ifdef DEBUG_PLIVE
1456                     dolog ("Finishing with old voice\n");
1457 #endif
1458                     audio_close_out (sw);
1459                 }
1460                 sw = sw1;
1461             }
1462         }
1463     }
1464 }
1465
1466 static void audio_run_in (AudioState *s)
1467 {
1468     HWVoiceIn *hw = NULL;
1469
1470     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1471         SWVoiceIn *sw;
1472         int captured, min;
1473
1474         captured = hw->pcm_ops->run_in (hw);
1475
1476         min = audio_pcm_hw_find_min_in (hw);
1477         hw->total_samples_captured += captured - min;
1478         hw->ts_helper += captured;
1479
1480         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1481             sw->total_hw_samples_acquired -= min;
1482
1483             if (sw->active) {
1484                 int avail;
1485
1486                 avail = audio_get_avail (sw);
1487                 if (avail > 0) {
1488                     sw->callback.fn (sw->callback.opaque, avail);
1489                 }
1490             }
1491         }
1492     }
1493 }
1494
1495 static void audio_run_capture (AudioState *s)
1496 {
1497     CaptureVoiceOut *cap;
1498
1499     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1500         int live, rpos, captured;
1501         HWVoiceOut *hw = &cap->hw;
1502         SWVoiceOut *sw;
1503
1504         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1505         rpos = hw->rpos;
1506         while (live) {
1507             int left = hw->samples - rpos;
1508             int to_capture = audio_MIN (live, left);
1509             struct st_sample *src;
1510             struct capture_callback *cb;
1511
1512             src = hw->mix_buf + rpos;
1513             hw->clip (cap->buf, src, to_capture);
1514             mixeng_clear (src, to_capture);
1515
1516             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1517                 cb->ops.capture (cb->opaque, cap->buf,
1518                                  to_capture << hw->info.shift);
1519             }
1520             rpos = (rpos + to_capture) % hw->samples;
1521             live -= to_capture;
1522         }
1523         hw->rpos = rpos;
1524
1525         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1526             if (!sw->active && sw->empty) {
1527                 continue;
1528             }
1529
1530             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1531                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1532                        captured, sw->total_hw_samples_mixed);
1533                 captured = sw->total_hw_samples_mixed;
1534             }
1535
1536             sw->total_hw_samples_mixed -= captured;
1537             sw->empty = sw->total_hw_samples_mixed == 0;
1538         }
1539     }
1540 }
1541
1542 void audio_run (const char *msg)
1543 {
1544     AudioState *s = &glob_audio_state;
1545
1546     audio_run_out (s);
1547     audio_run_in (s);
1548     audio_run_capture (s);
1549 #ifdef DEBUG_POLL
1550     {
1551         static double prevtime;
1552         double currtime;
1553         struct timeval tv;
1554
1555         if (gettimeofday (&tv, NULL)) {
1556             perror ("audio_run: gettimeofday");
1557             return;
1558         }
1559
1560         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1561         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1562         prevtime = currtime;
1563     }
1564 #endif
1565 }
1566
1567 static struct audio_option audio_options[] = {
1568     /* DAC */
1569     {
1570         .name  = "DAC_FIXED_SETTINGS",
1571         .tag   = AUD_OPT_BOOL,
1572         .valp  = &conf.fixed_out.enabled,
1573         .descr = "Use fixed settings for host DAC"
1574     },
1575     {
1576         .name  = "DAC_FIXED_FREQ",
1577         .tag   = AUD_OPT_INT,
1578         .valp  = &conf.fixed_out.settings.freq,
1579         .descr = "Frequency for fixed host DAC"
1580     },
1581     {
1582         .name  = "DAC_FIXED_FMT",
1583         .tag   = AUD_OPT_FMT,
1584         .valp  = &conf.fixed_out.settings.fmt,
1585         .descr = "Format for fixed host DAC"
1586     },
1587     {
1588         .name  = "DAC_FIXED_CHANNELS",
1589         .tag   = AUD_OPT_INT,
1590         .valp  = &conf.fixed_out.settings.nchannels,
1591         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1592     },
1593     {
1594         .name  = "DAC_VOICES",
1595         .tag   = AUD_OPT_INT,
1596         .valp  = &conf.fixed_out.nb_voices,
1597         .descr = "Number of voices for DAC"
1598     },
1599     {
1600         .name  = "DAC_TRY_POLL",
1601         .tag   = AUD_OPT_BOOL,
1602         .valp  = &conf.try_poll_out,
1603         .descr = "Attempt using poll mode for DAC"
1604     },
1605     /* ADC */
1606     {
1607         .name  = "ADC_FIXED_SETTINGS",
1608         .tag   = AUD_OPT_BOOL,
1609         .valp  = &conf.fixed_in.enabled,
1610         .descr = "Use fixed settings for host ADC"
1611     },
1612     {
1613         .name  = "ADC_FIXED_FREQ",
1614         .tag   = AUD_OPT_INT,
1615         .valp  = &conf.fixed_in.settings.freq,
1616         .descr = "Frequency for fixed host ADC"
1617     },
1618     {
1619         .name  = "ADC_FIXED_FMT",
1620         .tag   = AUD_OPT_FMT,
1621         .valp  = &conf.fixed_in.settings.fmt,
1622         .descr = "Format for fixed host ADC"
1623     },
1624     {
1625         .name  = "ADC_FIXED_CHANNELS",
1626         .tag   = AUD_OPT_INT,
1627         .valp  = &conf.fixed_in.settings.nchannels,
1628         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1629     },
1630     {
1631         .name  = "ADC_VOICES",
1632         .tag   = AUD_OPT_INT,
1633         .valp  = &conf.fixed_in.nb_voices,
1634         .descr = "Number of voices for ADC"
1635     },
1636     {
1637         .name  = "ADC_TRY_POLL",
1638         .tag   = AUD_OPT_BOOL,
1639         .valp  = &conf.try_poll_in,
1640         .descr = "Attempt using poll mode for ADC"
1641     },
1642     /* Misc */
1643     {
1644         .name  = "TIMER_PERIOD",
1645         .tag   = AUD_OPT_INT,
1646         .valp  = &conf.period.hertz,
1647         .descr = "Timer period in HZ (0 - use lowest possible)"
1648     },
1649     {
1650         .name  = "PLIVE",
1651         .tag   = AUD_OPT_BOOL,
1652         .valp  = &conf.plive,
1653         .descr = "(undocumented)"
1654     },
1655     {
1656         .name  = "LOG_TO_MONITOR",
1657         .tag   = AUD_OPT_BOOL,
1658         .valp  = &conf.log_to_monitor,
1659         .descr = "Print logging messages to monitor instead of stderr"
1660     },
1661     { /* End of list */ }
1662 };
1663
1664 static void audio_pp_nb_voices (const char *typ, int nb)
1665 {
1666     switch (nb) {
1667     case 0:
1668         printf ("Does not support %s\n", typ);
1669         break;
1670     case 1:
1671         printf ("One %s voice\n", typ);
1672         break;
1673     case INT_MAX:
1674         printf ("Theoretically supports many %s voices\n", typ);
1675         break;
1676     default:
1677         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1678         break;
1679     }
1680
1681 }
1682
1683 void AUD_help (void)
1684 {
1685     size_t i;
1686
1687     audio_process_options ("AUDIO", audio_options);
1688     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1689         struct audio_driver *d = drvtab[i];
1690         if (d->options) {
1691             audio_process_options (d->name, d->options);
1692         }
1693     }
1694
1695     printf ("Audio options:\n");
1696     audio_print_options ("AUDIO", audio_options);
1697     printf ("\n");
1698
1699     printf ("Available drivers:\n");
1700
1701     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1702         struct audio_driver *d = drvtab[i];
1703
1704         printf ("Name: %s\n", d->name);
1705         printf ("Description: %s\n", d->descr);
1706
1707         audio_pp_nb_voices ("playback", d->max_voices_out);
1708         audio_pp_nb_voices ("capture", d->max_voices_in);
1709
1710         if (d->options) {
1711             printf ("Options:\n");
1712             audio_print_options (d->name, d->options);
1713         }
1714         else {
1715             printf ("No options\n");
1716         }
1717         printf ("\n");
1718     }
1719
1720     printf (
1721         "Options are settable through environment variables.\n"
1722         "Example:\n"
1723 #ifdef _WIN32
1724         "  set QEMU_AUDIO_DRV=wav\n"
1725         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1726 #else
1727         "  export QEMU_AUDIO_DRV=wav\n"
1728         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1729         "(for csh replace export with setenv in the above)\n"
1730 #endif
1731         "  qemu ...\n\n"
1732         );
1733 }
1734
1735 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1736 {
1737     if (drv->options) {
1738         audio_process_options (drv->name, drv->options);
1739     }
1740     s->drv_opaque = drv->init ();
1741
1742     if (s->drv_opaque) {
1743         audio_init_nb_voices_out (drv);
1744         audio_init_nb_voices_in (drv);
1745         s->drv = drv;
1746         return 0;
1747     }
1748     else {
1749         dolog ("Could not init `%s' audio driver\n", drv->name);
1750         return -1;
1751     }
1752 }
1753
1754 static void audio_vm_change_state_handler (void *opaque, int running,
1755                                            RunState state)
1756 {
1757     AudioState *s = opaque;
1758     HWVoiceOut *hwo = NULL;
1759     HWVoiceIn *hwi = NULL;
1760     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1761
1762     s->vm_running = running;
1763     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1764         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1765     }
1766
1767     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1768         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1769     }
1770     audio_reset_timer (s);
1771 }
1772
1773 static void audio_atexit (void)
1774 {
1775     AudioState *s = &glob_audio_state;
1776     HWVoiceOut *hwo = NULL;
1777     HWVoiceIn *hwi = NULL;
1778
1779     while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
1780         SWVoiceCap *sc;
1781
1782         if (hwo->enabled) {
1783             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1784         }
1785         hwo->pcm_ops->fini_out (hwo);
1786
1787         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1788             CaptureVoiceOut *cap = sc->cap;
1789             struct capture_callback *cb;
1790
1791             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1792                 cb->ops.destroy (cb->opaque);
1793             }
1794         }
1795     }
1796
1797     while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
1798         if (hwi->enabled) {
1799             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1800         }
1801         hwi->pcm_ops->fini_in (hwi);
1802     }
1803
1804     if (s->drv) {
1805         s->drv->fini (s->drv_opaque);
1806     }
1807 }
1808
1809 static const VMStateDescription vmstate_audio = {
1810     .name = "audio",
1811     .version_id = 1,
1812     .minimum_version_id = 1,
1813     .minimum_version_id_old = 1,
1814     .fields      = (VMStateField []) {
1815         VMSTATE_END_OF_LIST()
1816     }
1817 };
1818
1819 static void audio_init (void)
1820 {
1821     size_t i;
1822     int done = 0;
1823     const char *drvname;
1824     VMChangeStateEntry *e;
1825     AudioState *s = &glob_audio_state;
1826
1827     if (s->drv) {
1828         return;
1829     }
1830
1831     QLIST_INIT (&s->hw_head_out);
1832     QLIST_INIT (&s->hw_head_in);
1833     QLIST_INIT (&s->cap_head);
1834     atexit (audio_atexit);
1835
1836     s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1837     if (!s->ts) {
1838         hw_error("Could not create audio timer\n");
1839     }
1840
1841     audio_process_options ("AUDIO", audio_options);
1842
1843     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1844     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1845
1846     if (s->nb_hw_voices_out <= 0) {
1847         dolog ("Bogus number of playback voices %d, setting to 1\n",
1848                s->nb_hw_voices_out);
1849         s->nb_hw_voices_out = 1;
1850     }
1851
1852     if (s->nb_hw_voices_in <= 0) {
1853         dolog ("Bogus number of capture voices %d, setting to 0\n",
1854                s->nb_hw_voices_in);
1855         s->nb_hw_voices_in = 0;
1856     }
1857
1858     {
1859         int def;
1860         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1861     }
1862
1863     if (drvname) {
1864         int found = 0;
1865
1866         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1867             if (!strcmp (drvname, drvtab[i]->name)) {
1868                 done = !audio_driver_init (s, drvtab[i]);
1869                 found = 1;
1870                 break;
1871             }
1872         }
1873
1874         if (!found) {
1875             dolog ("Unknown audio driver `%s'\n", drvname);
1876             dolog ("Run with -audio-help to list available drivers\n");
1877         }
1878     }
1879
1880     if (!done) {
1881         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1882             if (drvtab[i]->can_be_default) {
1883                 done = !audio_driver_init (s, drvtab[i]);
1884             }
1885         }
1886     }
1887
1888     if (!done) {
1889         done = !audio_driver_init (s, &no_audio_driver);
1890         if (!done) {
1891             hw_error("Could not initialize audio subsystem\n");
1892         }
1893         else {
1894             dolog ("warning: Using timer based audio emulation\n");
1895         }
1896     }
1897
1898     if (conf.period.hertz <= 0) {
1899         if (conf.period.hertz < 0) {
1900             dolog ("warning: Timer period is negative - %d "
1901                    "treating as zero\n",
1902                    conf.period.hertz);
1903         }
1904         conf.period.ticks = 1;
1905     } else {
1906         conf.period.ticks =
1907             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1908     }
1909
1910     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1911     if (!e) {
1912         dolog ("warning: Could not register change state handler\n"
1913                "(Audio can continue looping even after stopping the VM)\n");
1914     }
1915
1916     QLIST_INIT (&s->card_head);
1917     vmstate_register (NULL, 0, &vmstate_audio, s);
1918 }
1919
1920 void AUD_register_card (const char *name, QEMUSoundCard *card)
1921 {
1922     audio_init ();
1923     card->name = g_strdup (name);
1924     memset (&card->entries, 0, sizeof (card->entries));
1925     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1926 }
1927
1928 void AUD_remove_card (QEMUSoundCard *card)
1929 {
1930     QLIST_REMOVE (card, entries);
1931     g_free (card->name);
1932 }
1933
1934
1935 CaptureVoiceOut *AUD_add_capture (
1936     struct audsettings *as,
1937     struct audio_capture_ops *ops,
1938     void *cb_opaque
1939     )
1940 {
1941     AudioState *s = &glob_audio_state;
1942     CaptureVoiceOut *cap;
1943     struct capture_callback *cb;
1944
1945     if (audio_validate_settings (as)) {
1946         dolog ("Invalid settings were passed when trying to add capture\n");
1947         audio_print_settings (as);
1948         goto err0;
1949     }
1950
1951     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1952     if (!cb) {
1953         dolog ("Could not allocate capture callback information, size %zu\n",
1954                sizeof (*cb));
1955         goto err0;
1956     }
1957     cb->ops = *ops;
1958     cb->opaque = cb_opaque;
1959
1960     cap = audio_pcm_capture_find_specific (as);
1961     if (cap) {
1962         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1963         return cap;
1964     }
1965     else {
1966         HWVoiceOut *hw;
1967         CaptureVoiceOut *cap;
1968
1969         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1970         if (!cap) {
1971             dolog ("Could not allocate capture voice, size %zu\n",
1972                    sizeof (*cap));
1973             goto err1;
1974         }
1975
1976         hw = &cap->hw;
1977         QLIST_INIT (&hw->sw_head);
1978         QLIST_INIT (&cap->cb_head);
1979
1980         /* XXX find a more elegant way */
1981         hw->samples = 4096 * 4;
1982         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1983                                     sizeof (struct st_sample));
1984         if (!hw->mix_buf) {
1985             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1986                    hw->samples);
1987             goto err2;
1988         }
1989
1990         audio_pcm_init_info (&hw->info, as);
1991
1992         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1993         if (!cap->buf) {
1994             dolog ("Could not allocate capture buffer "
1995                    "(%d samples, each %d bytes)\n",
1996                    hw->samples, 1 << hw->info.shift);
1997             goto err3;
1998         }
1999
2000         hw->clip = mixeng_clip
2001             [hw->info.nchannels == 2]
2002             [hw->info.sign]
2003             [hw->info.swap_endianness]
2004             [audio_bits_to_index (hw->info.bits)];
2005
2006         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2007         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2008
2009         hw = NULL;
2010         while ((hw = audio_pcm_hw_find_any_out (hw))) {
2011             audio_attach_capture (hw);
2012         }
2013         return cap;
2014
2015     err3:
2016         g_free (cap->hw.mix_buf);
2017     err2:
2018         g_free (cap);
2019     err1:
2020         g_free (cb);
2021     err0:
2022         return NULL;
2023     }
2024 }
2025
2026 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2027 {
2028     struct capture_callback *cb;
2029
2030     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2031         if (cb->opaque == cb_opaque) {
2032             cb->ops.destroy (cb_opaque);
2033             QLIST_REMOVE (cb, entries);
2034             g_free (cb);
2035
2036             if (!cap->cb_head.lh_first) {
2037                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2038
2039                 while (sw) {
2040                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2041 #ifdef DEBUG_CAPTURE
2042                     dolog ("freeing %s\n", sw->name);
2043 #endif
2044
2045                     sw1 = sw->entries.le_next;
2046                     if (sw->rate) {
2047                         st_rate_stop (sw->rate);
2048                         sw->rate = NULL;
2049                     }
2050                     QLIST_REMOVE (sw, entries);
2051                     QLIST_REMOVE (sc, entries);
2052                     g_free (sc);
2053                     sw = sw1;
2054                 }
2055                 QLIST_REMOVE (cap, entries);
2056                 g_free (cap);
2057             }
2058             return;
2059         }
2060     }
2061 }
2062
2063 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2064 {
2065     if (sw) {
2066         HWVoiceOut *hw = sw->hw;
2067
2068         sw->vol.mute = mute;
2069         sw->vol.l = nominal_volume.l * lvol / 255;
2070         sw->vol.r = nominal_volume.r * rvol / 255;
2071
2072         if (hw->pcm_ops->ctl_out) {
2073             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2074         }
2075     }
2076 }
2077
2078 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2079 {
2080     if (sw) {
2081         HWVoiceIn *hw = sw->hw;
2082
2083         sw->vol.mute = mute;
2084         sw->vol.l = nominal_volume.l * lvol / 255;
2085         sw->vol.r = nominal_volume.r * rvol / 255;
2086
2087         if (hw->pcm_ops->ctl_in) {
2088             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2089         }
2090     }
2091 }