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.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
  38 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  39
  40
  41 /* Order of CONFIG_AUDIO_DRIVERS is import.
  42    The 1st one is the one used by default, that is the reason
  43     that we generate the list.
  44 */
  45 static struct audio_driver *drvtab[] = {
  46     CONFIG_AUDIO_DRIVERS
  47     &no_audio_driver,
  48     &wav_audio_driver
  49 };
  50
  51 struct fixed_settings {
  52     int enabled;
  53     int nb_voices;
  54     int greedy;
  55     struct audsettings settings;
  56 };
  57
  58 static struct {
  59     struct fixed_settings fixed_out;
  60     struct fixed_settings fixed_in;
  61     union {
  62         int hertz;
  63         int64_t ticks;
  64     } period;
  65     int plive;
  66     int log_to_monitor;
  67 } conf = {
  68     .fixed_out = { /* DAC fixed settings */
  69         .enabled = 1,
  70         .nb_voices = 1,
  71         .greedy = 1,
  72         .settings = {
  73             .freq = 44100,
  74             .nchannels = 2,
  75             .fmt = AUD_FMT_S16,
  76             .endianness =  AUDIO_HOST_ENDIANNESS,
  77         }
  78     },
  79
  80     .fixed_in = { /* ADC fixed settings */
  81         .enabled = 1,
  82         .nb_voices = 1,
  83         .greedy = 1,
  84         .settings = {
  85             .freq = 44100,
  86             .nchannels = 2,
  87             .fmt = AUD_FMT_S16,
  88             .endianness = AUDIO_HOST_ENDIANNESS,
  89         }
  90     },
  91
  92     .period = { .hertz = 250 },
  93     .plive = 0,
  94     .log_to_monitor = 0,
  95 };
  96
  97 static AudioState glob_audio_state;
  98
  99 struct mixeng_volume nominal_volume = {
 100     .mute = 0,
 101 #ifdef FLOAT_MIXENG
 102     .r = 1.0,
 103     .l = 1.0,
 104 #else
 105     .r = 1ULL << 32,
 106     .l = 1ULL << 32,
 107 #endif
 108 };
 109
 110 /* http://www.df.lth.se/~john_e/gems/gem002d.html */
 111 /* http://www.multi-platforms.com/Tips/PopCount.htm */
 112 uint32_t popcount (uint32_t u)
 113 {
 114     u = ((u&0x55555555) + ((u>>1)&0x55555555));
 115     u = ((u&0x33333333) + ((u>>2)&0x33333333));
 116     u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
 117     u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
 118     u = ( u&0x0000ffff) + (u>>16);
 119     return u;
 120 }
 121
 122 inline uint32_t lsbindex (uint32_t u)
 123 {
 124     return popcount ((u&-u)-1);
 125 }
 126
 127 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 128 #error No its not
 129 #else
 130 int audio_bug (const char *funcname, int cond)
 131 {
 132     if (cond) {
 133         static int shown;
 134
 135         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 136         if (!shown) {
 137             shown = 1;
 138             AUD_log (NULL, "Save all your work and restart without audio\n");
 139             AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
 140             AUD_log (NULL, "I am sorry\n");
 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 qemu_mallocz (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 = qemu_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(cur_mon, "%s: ", cap);
 337         }
 338
 339         monitor_vprintf(cur_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     qemu_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 = qemu_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         qemu_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     case AUD_FMT_U8:
 589         break;
 590
 591     case AUD_FMT_S16:
 592         sign = 1;
 593     case AUD_FMT_U16:
 594         bits = 16;
 595         break;
 596
 597     case AUD_FMT_S32:
 598         sign = 1;
 599     case AUD_FMT_U32:
 600         bits = 32;
 601         break;
 602     }
 603     return info->freq == as->freq
 604         && info->nchannels == as->nchannels
 605         && info->sign == sign
 606         && info->bits == bits
 607         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 608 }
 609
 610 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 611 {
 612     int bits = 8, sign = 0, shift = 0;
 613
 614     switch (as->fmt) {
 615     case AUD_FMT_S8:
 616         sign = 1;
 617     case AUD_FMT_U8:
 618         break;
 619
 620     case AUD_FMT_S16:
 621         sign = 1;
 622     case AUD_FMT_U16:
 623         bits = 16;
 624         shift = 1;
 625         break;
 626
 627     case AUD_FMT_S32:
 628         sign = 1;
 629     case AUD_FMT_U32:
 630         bits = 32;
 631         shift = 2;
 632         break;
 633     }
 634
 635     info->freq = as->freq;
 636     info->bits = bits;
 637     info->sign = sign;
 638     info->nchannels = as->nchannels;
 639     info->shift = (as->nchannels == 2) + shift;
 640     info->align = (1 << info->shift) - 1;
 641     info->bytes_per_second = info->freq << info->shift;
 642     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 643 }
 644
 645 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 646 {
 647     if (!len) {
 648         return;
 649     }
 650
 651     if (info->sign) {
 652         memset (buf, 0x00, len << info->shift);
 653     }
 654     else {
 655         switch (info->bits) {
 656         case 8:
 657             memset (buf, 0x80, len << info->shift);
 658             break;
 659
 660         case 16:
 661             {
 662                 int i;
 663                 uint16_t *p = buf;
 664                 int shift = info->nchannels - 1;
 665                 short s = INT16_MAX;
 666
 667                 if (info->swap_endianness) {
 668                     s = bswap16 (s);
 669                 }
 670
 671                 for (i = 0; i < len << shift; i++) {
 672                     p[i] = s;
 673                 }
 674             }
 675             break;
 676
 677         case 32:
 678             {
 679                 int i;
 680                 uint32_t *p = buf;
 681                 int shift = info->nchannels - 1;
 682                 int32_t s = INT32_MAX;
 683
 684                 if (info->swap_endianness) {
 685                     s = bswap32 (s);
 686                 }
 687
 688                 for (i = 0; i < len << shift; i++) {
 689                     p[i] = s;
 690                 }
 691             }
 692             break;
 693
 694         default:
 695             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 696                      info->bits);
 697             break;
 698         }
 699     }
 700 }
 701
 702 /*
 703  * Capture
 704  */
 705 static void noop_conv (struct st_sample *dst, const void *src,
 706                        int samples, struct mixeng_volume *vol)
 707 {
 708     (void) src;
 709     (void) dst;
 710     (void) samples;
 711     (void) vol;
 712 }
 713
 714 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 715     struct audsettings *as
 716     )
 717 {
 718     CaptureVoiceOut *cap;
 719     AudioState *s = &glob_audio_state;
 720
 721     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 722         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 723             return cap;
 724         }
 725     }
 726     return NULL;
 727 }
 728
 729 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 730 {
 731     struct capture_callback *cb;
 732
 733 #ifdef DEBUG_CAPTURE
 734     dolog ("notification %d sent\n", cmd);
 735 #endif
 736     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 737         cb->ops.notify (cb->opaque, cmd);
 738     }
 739 }
 740
 741 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 742 {
 743     if (cap->hw.enabled != enabled) {
 744         audcnotification_e cmd;
 745         cap->hw.enabled = enabled;
 746         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 747         audio_notify_capture (cap, cmd);
 748     }
 749 }
 750
 751 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 752 {
 753     HWVoiceOut *hw = &cap->hw;
 754     SWVoiceOut *sw;
 755     int enabled = 0;
 756
 757     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 758         if (sw->active) {
 759             enabled = 1;
 760             break;
 761         }
 762     }
 763     audio_capture_maybe_changed (cap, enabled);
 764 }
 765
 766 static void audio_detach_capture (HWVoiceOut *hw)
 767 {
 768     SWVoiceCap *sc = hw->cap_head.lh_first;
 769
 770     while (sc) {
 771         SWVoiceCap *sc1 = sc->entries.le_next;
 772         SWVoiceOut *sw = &sc->sw;
 773         CaptureVoiceOut *cap = sc->cap;
 774         int was_active = sw->active;
 775
 776         if (sw->rate) {
 777             st_rate_stop (sw->rate);
 778             sw->rate = NULL;
 779         }
 780
 781         LIST_REMOVE (sw, entries);
 782         LIST_REMOVE (sc, entries);
 783         qemu_free (sc);
 784         if (was_active) {
 785             /* We have removed soft voice from the capture:
 786                this might have changed the overall status of the capture
 787                since this might have been the only active voice */
 788             audio_recalc_and_notify_capture (cap);
 789         }
 790         sc = sc1;
 791     }
 792 }
 793
 794 static int audio_attach_capture (HWVoiceOut *hw)
 795 {
 796     AudioState *s = &glob_audio_state;
 797     CaptureVoiceOut *cap;
 798
 799     audio_detach_capture (hw);
 800     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 801         SWVoiceCap *sc;
 802         SWVoiceOut *sw;
 803         HWVoiceOut *hw_cap = &cap->hw;
 804
 805         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 806         if (!sc) {
 807             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 808                    sizeof (*sc));
 809             return -1;
 810         }
 811
 812         sc->cap = cap;
 813         sw = &sc->sw;
 814         sw->hw = hw_cap;
 815         sw->info = hw->info;
 816         sw->empty = 1;
 817         sw->active = hw->enabled;
 818         sw->conv = noop_conv;
 819         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 820         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 821         if (!sw->rate) {
 822             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 823             qemu_free (sw);
 824             return -1;
 825         }
 826         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 827         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 828 #ifdef DEBUG_CAPTURE
 829         asprintf (&sw->name, "for %p %d,%d,%d",
 830                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 831         dolog ("Added %s active = %d\n", sw->name, sw->active);
 832 #endif
 833         if (sw->active) {
 834             audio_capture_maybe_changed (cap, 1);
 835         }
 836     }
 837     return 0;
 838 }
 839
 840 /*
 841  * Hard voice (capture)
 842  */
 843 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 844 {
 845     SWVoiceIn *sw;
 846     int m = hw->total_samples_captured;
 847
 848     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 849         if (sw->active) {
 850             m = audio_MIN (m, sw->total_hw_samples_acquired);
 851         }
 852     }
 853     return m;
 854 }
 855
 856 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 857 {
 858     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 859     if (audio_bug (AUDIO_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
 866 /*
 867  * Soft voice (capture)
 868  */
 869 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 870 {
 871     HWVoiceIn *hw = sw->hw;
 872     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 873     int rpos;
 874
 875     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 876         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 877         return 0;
 878     }
 879
 880     rpos = hw->wpos - live;
 881     if (rpos >= 0) {
 882         return rpos;
 883     }
 884     else {
 885         return hw->samples + rpos;
 886     }
 887 }
 888
 889 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 890 {
 891     HWVoiceIn *hw = sw->hw;
 892     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 893     struct st_sample *src, *dst = sw->buf;
 894
 895     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 896
 897     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 898     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 899         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 900         return 0;
 901     }
 902
 903     samples = size >> sw->info.shift;
 904     if (!live) {
 905         return 0;
 906     }
 907
 908     swlim = (live * sw->ratio) >> 32;
 909     swlim = audio_MIN (swlim, samples);
 910
 911     while (swlim) {
 912         src = hw->conv_buf + rpos;
 913         isamp = hw->wpos - rpos;
 914         /* XXX: <= ? */
 915         if (isamp <= 0) {
 916             isamp = hw->samples - rpos;
 917         }
 918
 919         if (!isamp) {
 920             break;
 921         }
 922         osamp = swlim;
 923
 924         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 925             dolog ("osamp=%d\n", osamp);
 926             return 0;
 927         }
 928
 929         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 930         swlim -= osamp;
 931         rpos = (rpos + isamp) % hw->samples;
 932         dst += osamp;
 933         ret += osamp;
 934         total += isamp;
 935     }
 936
 937     sw->clip (buf, sw->buf, ret);
 938     sw->total_hw_samples_acquired += total;
 939     return ret << sw->info.shift;
 940 }
 941
 942 /*
 943  * Hard voice (playback)
 944  */
 945 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 946 {
 947     SWVoiceOut *sw;
 948     int m = INT_MAX;
 949     int nb_live = 0;
 950
 951     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 952         if (sw->active || !sw->empty) {
 953             m = audio_MIN (m, sw->total_hw_samples_mixed);
 954             nb_live += 1;
 955         }
 956     }
 957
 958     *nb_livep = nb_live;
 959     return m;
 960 }
 961
 962 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 963 {
 964     int smin;
 965
 966     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 967
 968     if (!*nb_live) {
 969         return 0;
 970     }
 971     else {
 972         int live = smin;
 973
 974         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 975             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 976             return 0;
 977         }
 978         return live;
 979     }
 980 }
 981
 982 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 983 {
 984     int nb_live;
 985     int live;
 986
 987     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 988     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 989         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 990         return 0;
 991     }
 992     return live;
 993 }
 994
 995 /*
 996  * Soft voice (playback)
 997  */
 998 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 999 {
1000     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1001     int ret = 0, pos = 0, total = 0;
1002
1003     if (!sw) {
1004         return size;
1005     }
1006
1007     hwsamples = sw->hw->samples;
1008
1009     live = sw->total_hw_samples_mixed;
1010     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1011         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1012         return 0;
1013     }
1014
1015     if (live == hwsamples) {
1016 #ifdef DEBUG_OUT
1017         dolog ("%s is full %d\n", sw->name, live);
1018 #endif
1019         return 0;
1020     }
1021
1022     wpos = (sw->hw->rpos + live) % hwsamples;
1023     samples = size >> sw->info.shift;
1024
1025     dead = hwsamples - live;
1026     swlim = ((int64_t) dead << 32) / sw->ratio;
1027     swlim = audio_MIN (swlim, samples);
1028     if (swlim) {
1029         sw->conv (sw->buf, buf, swlim, &sw->vol);
1030     }
1031
1032     while (swlim) {
1033         dead = hwsamples - live;
1034         left = hwsamples - wpos;
1035         blck = audio_MIN (dead, left);
1036         if (!blck) {
1037             break;
1038         }
1039         isamp = swlim;
1040         osamp = blck;
1041         st_rate_flow_mix (
1042             sw->rate,
1043             sw->buf + pos,
1044             sw->hw->mix_buf + wpos,
1045             &isamp,
1046             &osamp
1047             );
1048         ret += isamp;
1049         swlim -= isamp;
1050         pos += isamp;
1051         live += osamp;
1052         wpos = (wpos + osamp) % hwsamples;
1053         total += osamp;
1054     }
1055
1056     sw->total_hw_samples_mixed += total;
1057     sw->empty = sw->total_hw_samples_mixed == 0;
1058
1059 #ifdef DEBUG_OUT
1060     dolog (
1061         "%s: write size %d ret %d total sw %d\n",
1062         SW_NAME (sw),
1063         size >> sw->info.shift,
1064         ret,
1065         sw->total_hw_samples_mixed
1066         );
1067 #endif
1068
1069     return ret << sw->info.shift;
1070 }
1071
1072 #ifdef DEBUG_AUDIO
1073 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1074 {
1075     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1076            cap, info->bits, info->sign, info->freq, info->nchannels);
1077 }
1078 #endif
1079
1080 #define DAC
1081 #include "audio_template.h"
1082 #undef DAC
1083 #include "audio_template.h"
1084
1085 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1086 {
1087     int bytes;
1088
1089     if (!sw) {
1090         /* XXX: Consider options */
1091         return size;
1092     }
1093
1094     if (!sw->hw->enabled) {
1095         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1096         return 0;
1097     }
1098
1099     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1100     return bytes;
1101 }
1102
1103 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1104 {
1105     int bytes;
1106
1107     if (!sw) {
1108         /* XXX: Consider options */
1109         return size;
1110     }
1111
1112     if (!sw->hw->enabled) {
1113         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1114         return 0;
1115     }
1116
1117     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1118     return bytes;
1119 }
1120
1121 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1122 {
1123     return sw->hw->samples << sw->hw->info.shift;
1124 }
1125
1126 void AUD_set_active_out (SWVoiceOut *sw, int on)
1127 {
1128     HWVoiceOut *hw;
1129
1130     if (!sw) {
1131         return;
1132     }
1133
1134     hw = sw->hw;
1135     if (sw->active != on) {
1136         AudioState *s = &glob_audio_state;
1137         SWVoiceOut *temp_sw;
1138         SWVoiceCap *sc;
1139
1140         if (on) {
1141             hw->pending_disable = 0;
1142             if (!hw->enabled) {
1143                 hw->enabled = 1;
1144                 if (s->vm_running) {
1145                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1146                 }
1147             }
1148         }
1149         else {
1150             if (hw->enabled) {
1151                 int nb_active = 0;
1152
1153                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1154                      temp_sw = temp_sw->entries.le_next) {
1155                     nb_active += temp_sw->active != 0;
1156                 }
1157
1158                 hw->pending_disable = nb_active == 1;
1159             }
1160         }
1161
1162         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1163             sc->sw.active = hw->enabled;
1164             if (hw->enabled) {
1165                 audio_capture_maybe_changed (sc->cap, 1);
1166             }
1167         }
1168         sw->active = on;
1169     }
1170 }
1171
1172 void AUD_set_active_in (SWVoiceIn *sw, int on)
1173 {
1174     HWVoiceIn *hw;
1175
1176     if (!sw) {
1177         return;
1178     }
1179
1180     hw = sw->hw;
1181     if (sw->active != on) {
1182         AudioState *s = &glob_audio_state;
1183         SWVoiceIn *temp_sw;
1184
1185         if (on) {
1186             if (!hw->enabled) {
1187                 hw->enabled = 1;
1188                 if (s->vm_running) {
1189                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1190                 }
1191             }
1192             sw->total_hw_samples_acquired = hw->total_samples_captured;
1193         }
1194         else {
1195             if (hw->enabled) {
1196                 int nb_active = 0;
1197
1198                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1199                      temp_sw = temp_sw->entries.le_next) {
1200                     nb_active += temp_sw->active != 0;
1201                 }
1202
1203                 if (nb_active == 1) {
1204                     hw->enabled = 0;
1205                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1206                 }
1207             }
1208         }
1209         sw->active = on;
1210     }
1211 }
1212
1213 static int audio_get_avail (SWVoiceIn *sw)
1214 {
1215     int live;
1216
1217     if (!sw) {
1218         return 0;
1219     }
1220
1221     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1222     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1223         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1224         return 0;
1225     }
1226
1227     ldebug (
1228         "%s: get_avail live %d ret %" PRId64 "\n",
1229         SW_NAME (sw),
1230         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1231         );
1232
1233     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1234 }
1235
1236 static int audio_get_free (SWVoiceOut *sw)
1237 {
1238     int live, dead;
1239
1240     if (!sw) {
1241         return 0;
1242     }
1243
1244     live = sw->total_hw_samples_mixed;
1245
1246     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1247         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1248         return 0;
1249     }
1250
1251     dead = sw->hw->samples - live;
1252
1253 #ifdef DEBUG_OUT
1254     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1255            SW_NAME (sw),
1256            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1257 #endif
1258
1259     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1260 }
1261
1262 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1263 {
1264     int n;
1265
1266     if (hw->enabled) {
1267         SWVoiceCap *sc;
1268
1269         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1270             SWVoiceOut *sw = &sc->sw;
1271             int rpos2 = rpos;
1272
1273             n = samples;
1274             while (n) {
1275                 int till_end_of_hw = hw->samples - rpos2;
1276                 int to_write = audio_MIN (till_end_of_hw, n);
1277                 int bytes = to_write << hw->info.shift;
1278                 int written;
1279
1280                 sw->buf = hw->mix_buf + rpos2;
1281                 written = audio_pcm_sw_write (sw, NULL, bytes);
1282                 if (written - bytes) {
1283                     dolog ("Could not mix %d bytes into a capture "
1284                            "buffer, mixed %d\n",
1285                            bytes, written);
1286                     break;
1287                 }
1288                 n -= to_write;
1289                 rpos2 = (rpos2 + to_write) % hw->samples;
1290             }
1291         }
1292     }
1293
1294     n = audio_MIN (samples, hw->samples - rpos);
1295     mixeng_clear (hw->mix_buf + rpos, n);
1296     mixeng_clear (hw->mix_buf, samples - n);
1297 }
1298
1299 static void audio_run_out (AudioState *s)
1300 {
1301     HWVoiceOut *hw = NULL;
1302     SWVoiceOut *sw;
1303
1304     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1305         int played;
1306         int live, free, nb_live, cleanup_required, prev_rpos;
1307
1308         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1309         if (!nb_live) {
1310             live = 0;
1311         }
1312
1313         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1314             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1315             continue;
1316         }
1317
1318         if (hw->pending_disable && !nb_live) {
1319             SWVoiceCap *sc;
1320 #ifdef DEBUG_OUT
1321             dolog ("Disabling voice\n");
1322 #endif
1323             hw->enabled = 0;
1324             hw->pending_disable = 0;
1325             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1326             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1327                 sc->sw.active = 0;
1328                 audio_recalc_and_notify_capture (sc->cap);
1329             }
1330             continue;
1331         }
1332
1333         if (!live) {
1334             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1335                 if (sw->active) {
1336                     free = audio_get_free (sw);
1337                     if (free > 0) {
1338                         sw->callback.fn (sw->callback.opaque, free);
1339                     }
1340                 }
1341             }
1342             continue;
1343         }
1344
1345         prev_rpos = hw->rpos;
1346         played = hw->pcm_ops->run_out (hw);
1347         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1348             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1349                    hw->rpos, hw->samples, played);
1350             hw->rpos = 0;
1351         }
1352
1353 #ifdef DEBUG_OUT
1354         dolog ("played=%d\n", played);
1355 #endif
1356
1357         if (played) {
1358             hw->ts_helper += played;
1359             audio_capture_mix_and_clear (hw, prev_rpos, played);
1360         }
1361
1362         cleanup_required = 0;
1363         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1364             if (!sw->active && sw->empty) {
1365                 continue;
1366             }
1367
1368             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1369                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1370                        played, sw->total_hw_samples_mixed);
1371                 played = sw->total_hw_samples_mixed;
1372             }
1373
1374             sw->total_hw_samples_mixed -= played;
1375
1376             if (!sw->total_hw_samples_mixed) {
1377                 sw->empty = 1;
1378                 cleanup_required |= !sw->active && !sw->callback.fn;
1379             }
1380
1381             if (sw->active) {
1382                 free = audio_get_free (sw);
1383                 if (free > 0) {
1384                     sw->callback.fn (sw->callback.opaque, free);
1385                 }
1386             }
1387         }
1388
1389         if (cleanup_required) {
1390             SWVoiceOut *sw1;
1391
1392             sw = hw->sw_head.lh_first;
1393             while (sw) {
1394                 sw1 = sw->entries.le_next;
1395                 if (!sw->active && !sw->callback.fn) {
1396 #ifdef DEBUG_PLIVE
1397                     dolog ("Finishing with old voice\n");
1398 #endif
1399                     audio_close_out (sw);
1400                 }
1401                 sw = sw1;
1402             }
1403         }
1404     }
1405 }
1406
1407 static void audio_run_in (AudioState *s)
1408 {
1409     HWVoiceIn *hw = NULL;
1410
1411     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1412         SWVoiceIn *sw;
1413         int captured, min;
1414
1415         captured = hw->pcm_ops->run_in (hw);
1416
1417         min = audio_pcm_hw_find_min_in (hw);
1418         hw->total_samples_captured += captured - min;
1419         hw->ts_helper += captured;
1420
1421         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1422             sw->total_hw_samples_acquired -= min;
1423
1424             if (sw->active) {
1425                 int avail;
1426
1427                 avail = audio_get_avail (sw);
1428                 if (avail > 0) {
1429                     sw->callback.fn (sw->callback.opaque, avail);
1430                 }
1431             }
1432         }
1433     }
1434 }
1435
1436 static void audio_run_capture (AudioState *s)
1437 {
1438     CaptureVoiceOut *cap;
1439
1440     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1441         int live, rpos, captured;
1442         HWVoiceOut *hw = &cap->hw;
1443         SWVoiceOut *sw;
1444
1445         captured = live = audio_pcm_hw_get_live_out (hw);
1446         rpos = hw->rpos;
1447         while (live) {
1448             int left = hw->samples - rpos;
1449             int to_capture = audio_MIN (live, left);
1450             struct st_sample *src;
1451             struct capture_callback *cb;
1452
1453             src = hw->mix_buf + rpos;
1454             hw->clip (cap->buf, src, to_capture);
1455             mixeng_clear (src, to_capture);
1456
1457             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1458                 cb->ops.capture (cb->opaque, cap->buf,
1459                                  to_capture << hw->info.shift);
1460             }
1461             rpos = (rpos + to_capture) % hw->samples;
1462             live -= to_capture;
1463         }
1464         hw->rpos = rpos;
1465
1466         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1467             if (!sw->active && sw->empty) {
1468                 continue;
1469             }
1470
1471             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1472                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1473                        captured, sw->total_hw_samples_mixed);
1474                 captured = sw->total_hw_samples_mixed;
1475             }
1476
1477             sw->total_hw_samples_mixed -= captured;
1478             sw->empty = sw->total_hw_samples_mixed == 0;
1479         }
1480     }
1481 }
1482
1483 static void audio_timer (void *opaque)
1484 {
1485     AudioState *s = opaque;
1486
1487     audio_run_out (s);
1488     audio_run_in (s);
1489     audio_run_capture (s);
1490
1491     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1492 }
1493
1494 static struct audio_option audio_options[] = {
1495     /* DAC */
1496     {
1497         .name  = "DAC_FIXED_SETTINGS",
1498         .tag   = AUD_OPT_BOOL,
1499         .valp  = &conf.fixed_out.enabled,
1500         .descr = "Use fixed settings for host DAC"
1501     },
1502     {
1503         .name  = "DAC_FIXED_FREQ",
1504         .tag   = AUD_OPT_INT,
1505         .valp  = &conf.fixed_out.settings.freq,
1506         .descr = "Frequency for fixed host DAC"
1507     },
1508     {
1509         .name  = "DAC_FIXED_FMT",
1510         .tag   = AUD_OPT_FMT,
1511         .valp  = &conf.fixed_out.settings.fmt,
1512         .descr = "Format for fixed host DAC"
1513     },
1514     {
1515         .name  = "DAC_FIXED_CHANNELS",
1516         .tag   = AUD_OPT_INT,
1517         .valp  = &conf.fixed_out.settings.nchannels,
1518         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1519     },
1520     {
1521         .name  = "DAC_VOICES",
1522         .tag   = AUD_OPT_INT,
1523         .valp  = &conf.fixed_out.nb_voices,
1524         .descr = "Number of voices for DAC"
1525     },
1526     /* ADC */
1527     {
1528         .name  = "ADC_FIXED_SETTINGS",
1529         .tag   = AUD_OPT_BOOL,
1530         .valp  = &conf.fixed_in.enabled,
1531         .descr = "Use fixed settings for host ADC"
1532     },
1533     {
1534         .name  = "ADC_FIXED_FREQ",
1535         .tag   = AUD_OPT_INT,
1536         .valp  = &conf.fixed_in.settings.freq,
1537         .descr = "Frequency for fixed host ADC"
1538     },
1539     {
1540         .name  = "ADC_FIXED_FMT",
1541         .tag   = AUD_OPT_FMT,
1542         .valp  = &conf.fixed_in.settings.fmt,
1543         .descr = "Format for fixed host ADC"
1544     },
1545     {
1546         .name  = "ADC_FIXED_CHANNELS",
1547         .tag   = AUD_OPT_INT,
1548         .valp  = &conf.fixed_in.settings.nchannels,
1549         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1550     },
1551     {
1552         .name  = "ADC_VOICES",
1553         .tag   = AUD_OPT_INT,
1554         .valp  = &conf.fixed_in.nb_voices,
1555         .descr = "Number of voices for ADC"
1556     },
1557     /* Misc */
1558     {
1559         .name  = "TIMER_PERIOD",
1560         .tag   = AUD_OPT_INT,
1561         .valp  = &conf.period.hertz,
1562         .descr = "Timer period in HZ (0 - use lowest possible)"
1563     },
1564     {
1565         .name  = "PLIVE",
1566         .tag   = AUD_OPT_BOOL,
1567         .valp  = &conf.plive,
1568         .descr = "(undocumented)"
1569     },
1570     {
1571         .name  = "LOG_TO_MONITOR",
1572         .tag   = AUD_OPT_BOOL,
1573         .valp  = &conf.log_to_monitor,
1574         .descr = "print logging messages to monitor instead of stderr"
1575     },
1576     { /* End of list */ }
1577 };
1578
1579 static void audio_pp_nb_voices (const char *typ, int nb)
1580 {
1581     switch (nb) {
1582     case 0:
1583         printf ("Does not support %s\n", typ);
1584         break;
1585     case 1:
1586         printf ("One %s voice\n", typ);
1587         break;
1588     case INT_MAX:
1589         printf ("Theoretically supports many %s voices\n", typ);
1590         break;
1591     default:
1592         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1593         break;
1594     }
1595
1596 }
1597
1598 void AUD_help (void)
1599 {
1600     size_t i;
1601
1602     audio_process_options ("AUDIO", audio_options);
1603     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1604         struct audio_driver *d = drvtab[i];
1605         if (d->options) {
1606             audio_process_options (d->name, d->options);
1607         }
1608     }
1609
1610     printf ("Audio options:\n");
1611     audio_print_options ("AUDIO", audio_options);
1612     printf ("\n");
1613
1614     printf ("Available drivers:\n");
1615
1616     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1617         struct audio_driver *d = drvtab[i];
1618
1619         printf ("Name: %s\n", d->name);
1620         printf ("Description: %s\n", d->descr);
1621
1622         audio_pp_nb_voices ("playback", d->max_voices_out);
1623         audio_pp_nb_voices ("capture", d->max_voices_in);
1624
1625         if (d->options) {
1626             printf ("Options:\n");
1627             audio_print_options (d->name, d->options);
1628         }
1629         else {
1630             printf ("No options\n");
1631         }
1632         printf ("\n");
1633     }
1634
1635     printf (
1636         "Options are settable through environment variables.\n"
1637         "Example:\n"
1638 #ifdef _WIN32
1639         "  set QEMU_AUDIO_DRV=wav\n"
1640         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1641 #else
1642         "  export QEMU_AUDIO_DRV=wav\n"
1643         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1644         "(for csh replace export with setenv in the above)\n"
1645 #endif
1646         "  qemu ...\n\n"
1647         );
1648 }
1649
1650 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1651 {
1652     if (drv->options) {
1653         audio_process_options (drv->name, drv->options);
1654     }
1655     s->drv_opaque = drv->init ();
1656
1657     if (s->drv_opaque) {
1658         audio_init_nb_voices_out (drv);
1659         audio_init_nb_voices_in (drv);
1660         s->drv = drv;
1661         return 0;
1662     }
1663     else {
1664         dolog ("Could not init `%s' audio driver\n", drv->name);
1665         return -1;
1666     }
1667 }
1668
1669 static void audio_vm_change_state_handler (void *opaque, int running,
1670                                            int reason)
1671 {
1672     AudioState *s = opaque;
1673     HWVoiceOut *hwo = NULL;
1674     HWVoiceIn *hwi = NULL;
1675     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1676
1677     s->vm_running = running;
1678     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1679         hwo->pcm_ops->ctl_out (hwo, op);
1680     }
1681
1682     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1683         hwi->pcm_ops->ctl_in (hwi, op);
1684     }
1685 }
1686
1687 static void audio_atexit (void)
1688 {
1689     AudioState *s = &glob_audio_state;
1690     HWVoiceOut *hwo = NULL;
1691     HWVoiceIn *hwi = NULL;
1692
1693     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1694         SWVoiceCap *sc;
1695
1696         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1697         hwo->pcm_ops->fini_out (hwo);
1698
1699         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1700             CaptureVoiceOut *cap = sc->cap;
1701             struct capture_callback *cb;
1702
1703             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1704                 cb->ops.destroy (cb->opaque);
1705             }
1706         }
1707     }
1708
1709     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1710         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1711         hwi->pcm_ops->fini_in (hwi);
1712     }
1713
1714     if (s->drv) {
1715         s->drv->fini (s->drv_opaque);
1716     }
1717 }
1718
1719 static void audio_save (QEMUFile *f, void *opaque)
1720 {
1721     (void) f;
1722     (void) opaque;
1723 }
1724
1725 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1726 {
1727     (void) f;
1728     (void) opaque;
1729
1730     if (version_id != 1) {
1731         return -EINVAL;
1732     }
1733
1734     return 0;
1735 }
1736
1737 static void audio_init (void)
1738 {
1739     size_t i;
1740     int done = 0;
1741     const char *drvname;
1742     AudioState *s = &glob_audio_state;
1743
1744     if (s->drv) {
1745         return;
1746     }
1747
1748     LIST_INIT (&s->hw_head_out);
1749     LIST_INIT (&s->hw_head_in);
1750     LIST_INIT (&s->cap_head);
1751     atexit (audio_atexit);
1752
1753     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1754     if (!s->ts) {
1755         hw_error("Could not create audio timer\n");
1756     }
1757
1758     audio_process_options ("AUDIO", audio_options);
1759
1760     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1761     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1762
1763     if (s->nb_hw_voices_out <= 0) {
1764         dolog ("Bogus number of playback voices %d, setting to 1\n",
1765                s->nb_hw_voices_out);
1766         s->nb_hw_voices_out = 1;
1767     }
1768
1769     if (s->nb_hw_voices_in <= 0) {
1770         dolog ("Bogus number of capture voices %d, setting to 0\n",
1771                s->nb_hw_voices_in);
1772         s->nb_hw_voices_in = 0;
1773     }
1774
1775     {
1776         int def;
1777         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1778     }
1779
1780     if (drvname) {
1781         int found = 0;
1782
1783         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1784             if (!strcmp (drvname, drvtab[i]->name)) {
1785                 done = !audio_driver_init (s, drvtab[i]);
1786                 found = 1;
1787                 break;
1788             }
1789         }
1790
1791         if (!found) {
1792             dolog ("Unknown audio driver `%s'\n", drvname);
1793             dolog ("Run with -audio-help to list available drivers\n");
1794         }
1795     }
1796
1797     if (!done) {
1798         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1799             if (drvtab[i]->can_be_default) {
1800                 done = !audio_driver_init (s, drvtab[i]);
1801             }
1802         }
1803     }
1804
1805     if (!done) {
1806         done = !audio_driver_init (s, &no_audio_driver);
1807         if (!done) {
1808             hw_error("Could not initialize audio subsystem\n");
1809         }
1810         else {
1811             dolog ("warning: Using timer based audio emulation\n");
1812         }
1813     }
1814
1815     VMChangeStateEntry *e;
1816
1817     if (conf.period.hertz <= 0) {
1818         if (conf.period.hertz < 0) {
1819             dolog ("warning: Timer period is negative - %d "
1820                    "treating as zero\n",
1821                    conf.period.hertz);
1822         }
1823         conf.period.ticks = 1;
1824     } else {
1825         conf.period.ticks = ticks_per_sec / conf.period.hertz;
1826     }
1827
1828     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1829     if (!e) {
1830         dolog ("warning: Could not register change state handler\n"
1831                "(Audio can continue looping even after stopping the VM)\n");
1832     }
1833
1834     LIST_INIT (&s->card_head);
1835     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1836     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1837 }
1838
1839 void AUD_register_card (const char *name, QEMUSoundCard *card)
1840 {
1841     audio_init ();
1842     card->name = qemu_strdup (name);
1843     memset (&card->entries, 0, sizeof (card->entries));
1844     LIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1845 }
1846
1847 void AUD_remove_card (QEMUSoundCard *card)
1848 {
1849     LIST_REMOVE (card, entries);
1850     qemu_free (card->name);
1851 }
1852
1853
1854 CaptureVoiceOut *AUD_add_capture (
1855     struct audsettings *as,
1856     struct audio_capture_ops *ops,
1857     void *cb_opaque
1858     )
1859 {
1860     AudioState *s = &glob_audio_state;
1861     CaptureVoiceOut *cap;
1862     struct capture_callback *cb;
1863
1864     if (audio_validate_settings (as)) {
1865         dolog ("Invalid settings were passed when trying to add capture\n");
1866         audio_print_settings (as);
1867         goto err0;
1868     }
1869
1870     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1871     if (!cb) {
1872         dolog ("Could not allocate capture callback information, size %zu\n",
1873                sizeof (*cb));
1874         goto err0;
1875     }
1876     cb->ops = *ops;
1877     cb->opaque = cb_opaque;
1878
1879     cap = audio_pcm_capture_find_specific (as);
1880     if (cap) {
1881         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1882         return cap;
1883     }
1884     else {
1885         HWVoiceOut *hw;
1886         CaptureVoiceOut *cap;
1887
1888         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1889         if (!cap) {
1890             dolog ("Could not allocate capture voice, size %zu\n",
1891                    sizeof (*cap));
1892             goto err1;
1893         }
1894
1895         hw = &cap->hw;
1896         LIST_INIT (&hw->sw_head);
1897         LIST_INIT (&cap->cb_head);
1898
1899         /* XXX find a more elegant way */
1900         hw->samples = 4096 * 4;
1901         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1902                                     sizeof (struct st_sample));
1903         if (!hw->mix_buf) {
1904             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1905                    hw->samples);
1906             goto err2;
1907         }
1908
1909         audio_pcm_init_info (&hw->info, as);
1910
1911         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1912         if (!cap->buf) {
1913             dolog ("Could not allocate capture buffer "
1914                    "(%d samples, each %d bytes)\n",
1915                    hw->samples, 1 << hw->info.shift);
1916             goto err3;
1917         }
1918
1919         hw->clip = mixeng_clip
1920             [hw->info.nchannels == 2]
1921             [hw->info.sign]
1922             [hw->info.swap_endianness]
1923             [audio_bits_to_index (hw->info.bits)];
1924
1925         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1926         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1927
1928         hw = NULL;
1929         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1930             audio_attach_capture (hw);
1931         }
1932         return cap;
1933
1934     err3:
1935         qemu_free (cap->hw.mix_buf);
1936     err2:
1937         qemu_free (cap);
1938     err1:
1939         qemu_free (cb);
1940     err0:
1941         return NULL;
1942     }
1943 }
1944
1945 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1946 {
1947     struct capture_callback *cb;
1948
1949     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1950         if (cb->opaque == cb_opaque) {
1951             cb->ops.destroy (cb_opaque);
1952             LIST_REMOVE (cb, entries);
1953             qemu_free (cb);
1954
1955             if (!cap->cb_head.lh_first) {
1956                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1957
1958                 while (sw) {
1959                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1960 #ifdef DEBUG_CAPTURE
1961                     dolog ("freeing %s\n", sw->name);
1962 #endif
1963
1964                     sw1 = sw->entries.le_next;
1965                     if (sw->rate) {
1966                         st_rate_stop (sw->rate);
1967                         sw->rate = NULL;
1968                     }
1969                     LIST_REMOVE (sw, entries);
1970                     LIST_REMOVE (sc, entries);
1971                     qemu_free (sc);
1972                     sw = sw1;
1973                 }
1974                 LIST_REMOVE (cap, entries);
1975                 qemu_free (cap);
1976             }
1977             return;
1978         }
1979     }
1980 }
1981
1982 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1983 {
1984     if (sw) {
1985         sw->vol.mute = mute;
1986         sw->vol.l = nominal_volume.l * lvol / 255;
1987         sw->vol.r = nominal_volume.r * rvol / 255;
1988     }
1989 }
1990
1991 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1992 {
1993     if (sw) {
1994         sw->vol.mute = mute;
1995         sw->vol.l = nominal_volume.l * lvol / 255;
1996         sw->vol.r = nominal_volume.r * rvol / 255;
1997     }
1998 }