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 "console.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 static struct audio_driver *drvtab[] = {
  41 #ifdef CONFIG_OSS
  42     &oss_audio_driver,
  43 #endif
  44 #ifdef CONFIG_ALSA
  45     &alsa_audio_driver,
  46 #endif
  47 #ifdef CONFIG_COREAUDIO
  48     &coreaudio_audio_driver,
  49 #endif
  50 #ifdef CONFIG_DSOUND
  51     &dsound_audio_driver,
  52 #endif
  53 #ifdef CONFIG_FMOD
  54     &fmod_audio_driver,
  55 #endif
  56 #ifdef CONFIG_SDL
  57     &sdl_audio_driver,
  58 #endif
  59     &no_audio_driver,
  60     &wav_audio_driver
  61 };
  62
  63 struct fixed_settings {
  64     int enabled;
  65     int nb_voices;
  66     int greedy;
  67     audsettings_t settings;
  68 };
  69
  70 static struct {
  71     struct fixed_settings fixed_out;
  72     struct fixed_settings fixed_in;
  73     union {
  74         int hz;
  75         int64_t ticks;
  76     } period;
  77     int plive;
  78     int log_to_monitor;
  79 } conf = {
  80     {                           /* DAC fixed settings */
  81         1,                      /* enabled */
  82         1,                      /* nb_voices */
  83         1,                      /* greedy */
  84         {
  85             44100,              /* freq */
  86             2,                  /* nchannels */
  87             AUD_FMT_S16,        /* fmt */
  88             AUDIO_HOST_ENDIANNESS
  89         }
  90     },
  91
  92     {                           /* ADC fixed settings */
  93         1,                      /* enabled */
  94         1,                      /* nb_voices */
  95         1,                      /* greedy */
  96         {
  97             44100,              /* freq */
  98             2,                  /* nchannels */
  99             AUD_FMT_S16,        /* fmt */
 100             AUDIO_HOST_ENDIANNESS
 101         }
 102     },
 103
 104     { 0 },                      /* period */
 105     0,                          /* plive */
 106     0                           /* log_to_monitor */
 107 };
 108
 109 static AudioState glob_audio_state;
 110
 111 volume_t nominal_volume = {
 112     0,
 113 #ifdef FLOAT_MIXENG
 114     1.0,
 115     1.0
 116 #else
 117     UINT_MAX,
 118     UINT_MAX
 119 #endif
 120 };
 121
 122 /* http://www.df.lth.se/~john_e/gems/gem002d.html */
 123 /* http://www.multi-platforms.com/Tips/PopCount.htm */
 124 uint32_t popcount (uint32_t u)
 125 {
 126     u = ((u&0x55555555) + ((u>>1)&0x55555555));
 127     u = ((u&0x33333333) + ((u>>2)&0x33333333));
 128     u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
 129     u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
 130     u = ( u&0x0000ffff) + (u>>16);
 131     return u;
 132 }
 133
 134 inline uint32_t lsbindex (uint32_t u)
 135 {
 136     return popcount ((u&-u)-1);
 137 }
 138
 139 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 140 #error No its not
 141 #else
 142 int audio_bug (const char *funcname, int cond)
 143 {
 144     if (cond) {
 145         static int shown;
 146
 147         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 148         if (!shown) {
 149             shown = 1;
 150             AUD_log (NULL, "Save all your work and restart without audio\n");
 151             AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
 152             AUD_log (NULL, "I am sorry\n");
 153         }
 154         AUD_log (NULL, "Context:\n");
 155
 156 #if defined AUDIO_BREAKPOINT_ON_BUG
 157 #  if defined HOST_I386
 158 #    if defined __GNUC__
 159         __asm__ ("int3");
 160 #    elif defined _MSC_VER
 161         _asm _emit 0xcc;
 162 #    else
 163         abort ();
 164 #    endif
 165 #  else
 166         abort ();
 167 #  endif
 168 #endif
 169     }
 170
 171     return cond;
 172 }
 173 #endif
 174
 175 static inline int audio_bits_to_index (int bits)
 176 {
 177     switch (bits) {
 178     case 8:
 179         return 0;
 180
 181     case 16:
 182         return 1;
 183
 184     case 32:
 185         return 2;
 186
 187     default:
 188         audio_bug ("bits_to_index", 1);
 189         AUD_log (NULL, "invalid bits %d\n", bits);
 190         return 0;
 191     }
 192 }
 193
 194 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 195 {
 196     int cond;
 197     size_t len;
 198
 199     len = nmemb * size;
 200     cond = !nmemb || !size;
 201     cond |= nmemb < 0;
 202     cond |= len < size;
 203
 204     if (audio_bug ("audio_calloc", cond)) {
 205         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 206                  funcname);
 207         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 208         return NULL;
 209     }
 210
 211     return qemu_mallocz (len);
 212 }
 213
 214 static char *audio_alloc_prefix (const char *s)
 215 {
 216     const char qemu_prefix[] = "QEMU_";
 217     size_t len;
 218     char *r;
 219
 220     if (!s) {
 221         return NULL;
 222     }
 223
 224     len = strlen (s);
 225     r = qemu_malloc (len + sizeof (qemu_prefix));
 226
 227     if (r) {
 228         size_t i;
 229         char *u = r + sizeof (qemu_prefix) - 1;
 230
 231         strcpy (r, qemu_prefix);
 232         strcat (r, s);
 233
 234         for (i = 0; i < len; ++i) {
 235             u[i] = toupper (u[i]);
 236         }
 237     }
 238     return r;
 239 }
 240
 241 static const char *audio_audfmt_to_string (audfmt_e fmt)
 242 {
 243     switch (fmt) {
 244     case AUD_FMT_U8:
 245         return "U8";
 246
 247     case AUD_FMT_U16:
 248         return "U16";
 249
 250     case AUD_FMT_S8:
 251         return "S8";
 252
 253     case AUD_FMT_S16:
 254         return "S16";
 255
 256     case AUD_FMT_U32:
 257         return "U32";
 258
 259     case AUD_FMT_S32:
 260         return "S32";
 261     }
 262
 263     dolog ("Bogus audfmt %d returning S16\n", fmt);
 264     return "S16";
 265 }
 266
 267 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 268                                         int *defaultp)
 269 {
 270     if (!strcasecmp (s, "u8")) {
 271         *defaultp = 0;
 272         return AUD_FMT_U8;
 273     }
 274     else if (!strcasecmp (s, "u16")) {
 275         *defaultp = 0;
 276         return AUD_FMT_U16;
 277     }
 278     else if (!strcasecmp (s, "u32")) {
 279         *defaultp = 0;
 280         return AUD_FMT_U32;
 281     }
 282     else if (!strcasecmp (s, "s8")) {
 283         *defaultp = 0;
 284         return AUD_FMT_S8;
 285     }
 286     else if (!strcasecmp (s, "s16")) {
 287         *defaultp = 0;
 288         return AUD_FMT_S16;
 289     }
 290     else if (!strcasecmp (s, "s32")) {
 291         *defaultp = 0;
 292         return AUD_FMT_S32;
 293     }
 294     else {
 295         dolog ("Bogus audio format `%s' using %s\n",
 296                s, audio_audfmt_to_string (defval));
 297         *defaultp = 1;
 298         return defval;
 299     }
 300 }
 301
 302 static audfmt_e audio_get_conf_fmt (const char *envname,
 303                                     audfmt_e defval,
 304                                     int *defaultp)
 305 {
 306     const char *var = getenv (envname);
 307     if (!var) {
 308         *defaultp = 1;
 309         return defval;
 310     }
 311     return audio_string_to_audfmt (var, defval, defaultp);
 312 }
 313
 314 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 315 {
 316     int val;
 317     char *strval;
 318
 319     strval = getenv (key);
 320     if (strval) {
 321         *defaultp = 0;
 322         val = atoi (strval);
 323         return val;
 324     }
 325     else {
 326         *defaultp = 1;
 327         return defval;
 328     }
 329 }
 330
 331 static const char *audio_get_conf_str (const char *key,
 332                                        const char *defval,
 333                                        int *defaultp)
 334 {
 335     const char *val = getenv (key);
 336     if (!val) {
 337         *defaultp = 1;
 338         return defval;
 339     }
 340     else {
 341         *defaultp = 0;
 342         return val;
 343     }
 344 }
 345
 346 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 347 {
 348     if (conf.log_to_monitor) {
 349         if (cap) {
 350             term_printf ("%s: ", cap);
 351         }
 352
 353         term_vprintf (fmt, ap);
 354     }
 355     else {
 356         if (cap) {
 357             fprintf (stderr, "%s: ", cap);
 358         }
 359
 360         vfprintf (stderr, fmt, ap);
 361     }
 362 }
 363
 364 void AUD_log (const char *cap, const char *fmt, ...)
 365 {
 366     va_list ap;
 367
 368     va_start (ap, fmt);
 369     AUD_vlog (cap, fmt, ap);
 370     va_end (ap);
 371 }
 372
 373 static void audio_print_options (const char *prefix,
 374                                  struct audio_option *opt)
 375 {
 376     char *uprefix;
 377
 378     if (!prefix) {
 379         dolog ("No prefix specified\n");
 380         return;
 381     }
 382
 383     if (!opt) {
 384         dolog ("No options\n");
 385         return;
 386     }
 387
 388     uprefix = audio_alloc_prefix (prefix);
 389
 390     for (; opt->name; opt++) {
 391         const char *state = "default";
 392         printf ("  %s_%s: ", uprefix, opt->name);
 393
 394         if (opt->overriddenp && *opt->overriddenp) {
 395             state = "current";
 396         }
 397
 398         switch (opt->tag) {
 399         case AUD_OPT_BOOL:
 400             {
 401                 int *intp = opt->valp;
 402                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 403             }
 404             break;
 405
 406         case AUD_OPT_INT:
 407             {
 408                 int *intp = opt->valp;
 409                 printf ("integer, %s = %d\n", state, *intp);
 410             }
 411             break;
 412
 413         case AUD_OPT_FMT:
 414             {
 415                 audfmt_e *fmtp = opt->valp;
 416                 printf (
 417                     "format, %s = %s, (one of: U8 S8 U16 S16)\n",
 418                     state,
 419                     audio_audfmt_to_string (*fmtp)
 420                     );
 421             }
 422             break;
 423
 424         case AUD_OPT_STR:
 425             {
 426                 const char **strp = opt->valp;
 427                 printf ("string, %s = %s\n",
 428                         state,
 429                         *strp ? *strp : "(not set)");
 430             }
 431             break;
 432
 433         default:
 434             printf ("???\n");
 435             dolog ("Bad value tag for option %s_%s %d\n",
 436                    uprefix, opt->name, opt->tag);
 437             break;
 438         }
 439         printf ("    %s\n", opt->descr);
 440     }
 441
 442     qemu_free (uprefix);
 443 }
 444
 445 static void audio_process_options (const char *prefix,
 446                                    struct audio_option *opt)
 447 {
 448     char *optname;
 449     const char qemu_prefix[] = "QEMU_";
 450     size_t preflen;
 451
 452     if (audio_bug (AUDIO_FUNC, !prefix)) {
 453         dolog ("prefix = NULL\n");
 454         return;
 455     }
 456
 457     if (audio_bug (AUDIO_FUNC, !opt)) {
 458         dolog ("opt = NULL\n");
 459         return;
 460     }
 461
 462     preflen = strlen (prefix);
 463
 464     for (; opt->name; opt++) {
 465         size_t len, i;
 466         int def;
 467
 468         if (!opt->valp) {
 469             dolog ("Option value pointer for `%s' is not set\n",
 470                    opt->name);
 471             continue;
 472         }
 473
 474         len = strlen (opt->name);
 475         /* len of opt->name + len of prefix + size of qemu_prefix
 476          * (includes trailing zero) + zero + underscore (on behalf of
 477          * sizeof) */
 478         optname = qemu_malloc (len + preflen + sizeof (qemu_prefix) + 1);
 479         if (!optname) {
 480             dolog ("Could not allocate memory for option name `%s'\n",
 481                    opt->name);
 482             continue;
 483         }
 484
 485         strcpy (optname, qemu_prefix);
 486
 487         /* copy while upper-casing, including trailing zero */
 488         for (i = 0; i <= preflen; ++i) {
 489             optname[i + sizeof (qemu_prefix) - 1] = toupper (prefix[i]);
 490         }
 491         strcat (optname, "_");
 492         strcat (optname, opt->name);
 493
 494         def = 1;
 495         switch (opt->tag) {
 496         case AUD_OPT_BOOL:
 497         case AUD_OPT_INT:
 498             {
 499                 int *intp = opt->valp;
 500                 *intp = audio_get_conf_int (optname, *intp, &def);
 501             }
 502             break;
 503
 504         case AUD_OPT_FMT:
 505             {
 506                 audfmt_e *fmtp = opt->valp;
 507                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 508             }
 509             break;
 510
 511         case AUD_OPT_STR:
 512             {
 513                 const char **strp = opt->valp;
 514                 *strp = audio_get_conf_str (optname, *strp, &def);
 515             }
 516             break;
 517
 518         default:
 519             dolog ("Bad value tag for option `%s' - %d\n",
 520                    optname, opt->tag);
 521             break;
 522         }
 523
 524         if (!opt->overriddenp) {
 525             opt->overriddenp = &opt->overridden;
 526         }
 527         *opt->overriddenp = !def;
 528         qemu_free (optname);
 529     }
 530 }
 531
 532 static void audio_print_settings (audsettings_t *as)
 533 {
 534     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 535
 536     switch (as->fmt) {
 537     case AUD_FMT_S8:
 538         AUD_log (NULL, "S8");
 539         break;
 540     case AUD_FMT_U8:
 541         AUD_log (NULL, "U8");
 542         break;
 543     case AUD_FMT_S16:
 544         AUD_log (NULL, "S16");
 545         break;
 546     case AUD_FMT_U16:
 547         AUD_log (NULL, "U16");
 548         break;
 549     default:
 550         AUD_log (NULL, "invalid(%d)", as->fmt);
 551         break;
 552     }
 553
 554     AUD_log (NULL, " endianness=");
 555     switch (as->endianness) {
 556     case 0:
 557         AUD_log (NULL, "little");
 558         break;
 559     case 1:
 560         AUD_log (NULL, "big");
 561         break;
 562     default:
 563         AUD_log (NULL, "invalid");
 564         break;
 565     }
 566     AUD_log (NULL, "\n");
 567 }
 568
 569 static int audio_validate_settings (audsettings_t *as)
 570 {
 571     int invalid;
 572
 573     invalid = as->nchannels != 1 && as->nchannels != 2;
 574     invalid |= as->endianness != 0 && as->endianness != 1;
 575
 576     switch (as->fmt) {
 577     case AUD_FMT_S8:
 578     case AUD_FMT_U8:
 579     case AUD_FMT_S16:
 580     case AUD_FMT_U16:
 581     case AUD_FMT_S32:
 582     case AUD_FMT_U32:
 583         break;
 584     default:
 585         invalid = 1;
 586         break;
 587     }
 588
 589     invalid |= as->freq <= 0;
 590     return invalid ? -1 : 0;
 591 }
 592
 593 static int audio_pcm_info_eq (struct audio_pcm_info *info, audsettings_t *as)
 594 {
 595     int bits = 8, sign = 0;
 596
 597     switch (as->fmt) {
 598     case AUD_FMT_S8:
 599         sign = 1;
 600     case AUD_FMT_U8:
 601         break;
 602
 603     case AUD_FMT_S16:
 604         sign = 1;
 605     case AUD_FMT_U16:
 606         bits = 16;
 607         break;
 608
 609     case AUD_FMT_S32:
 610         sign = 1;
 611     case AUD_FMT_U32:
 612         bits = 32;
 613         break;
 614     }
 615     return info->freq == as->freq
 616         && info->nchannels == as->nchannels
 617         && info->sign == sign
 618         && info->bits == bits
 619         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 620 }
 621
 622 void audio_pcm_init_info (struct audio_pcm_info *info, audsettings_t *as)
 623 {
 624     int bits = 8, sign = 0, shift = 0;
 625
 626     switch (as->fmt) {
 627     case AUD_FMT_S8:
 628         sign = 1;
 629     case AUD_FMT_U8:
 630         break;
 631
 632     case AUD_FMT_S16:
 633         sign = 1;
 634     case AUD_FMT_U16:
 635         bits = 16;
 636         shift = 1;
 637         break;
 638
 639     case AUD_FMT_S32:
 640         sign = 1;
 641     case AUD_FMT_U32:
 642         bits = 32;
 643         shift = 2;
 644         break;
 645     }
 646
 647     info->freq = as->freq;
 648     info->bits = bits;
 649     info->sign = sign;
 650     info->nchannels = as->nchannels;
 651     info->shift = (as->nchannels == 2) + shift;
 652     info->align = (1 << info->shift) - 1;
 653     info->bytes_per_second = info->freq << info->shift;
 654     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 655 }
 656
 657 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 658 {
 659     if (!len) {
 660         return;
 661     }
 662
 663     if (info->sign) {
 664         memset (buf, 0x00, len << info->shift);
 665     }
 666     else {
 667         switch (info->bits) {
 668         case 8:
 669             memset (buf, 0x80, len << info->shift);
 670             break;
 671
 672         case 16:
 673             {
 674                 int i;
 675                 uint16_t *p = buf;
 676                 int shift = info->nchannels - 1;
 677                 short s = INT16_MAX;
 678
 679                 if (info->swap_endianness) {
 680                     s = bswap16 (s);
 681                 }
 682
 683                 for (i = 0; i < len << shift; i++) {
 684                     p[i] = s;
 685                 }
 686             }
 687             break;
 688
 689         case 32:
 690             {
 691                 int i;
 692                 uint32_t *p = buf;
 693                 int shift = info->nchannels - 1;
 694                 int32_t s = INT32_MAX;
 695
 696                 if (info->swap_endianness) {
 697                     s = bswap32 (s);
 698                 }
 699
 700                 for (i = 0; i < len << shift; i++) {
 701                     p[i] = s;
 702                 }
 703             }
 704             break;
 705
 706         default:
 707             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 708                      info->bits);
 709             break;
 710         }
 711     }
 712 }
 713
 714 /*
 715  * Capture
 716  */
 717 static void noop_conv (st_sample_t *dst, const void *src,
 718                        int samples, volume_t *vol)
 719 {
 720     (void) src;
 721     (void) dst;
 722     (void) samples;
 723     (void) vol;
 724 }
 725
 726 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 727     AudioState *s,
 728     audsettings_t *as
 729     )
 730 {
 731     CaptureVoiceOut *cap;
 732
 733     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 734         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 735             return cap;
 736         }
 737     }
 738     return NULL;
 739 }
 740
 741 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 742 {
 743     struct capture_callback *cb;
 744
 745 #ifdef DEBUG_CAPTURE
 746     dolog ("notification %d sent\n", cmd);
 747 #endif
 748     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 749         cb->ops.notify (cb->opaque, cmd);
 750     }
 751 }
 752
 753 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 754 {
 755     if (cap->hw.enabled != enabled) {
 756         audcnotification_e cmd;
 757         cap->hw.enabled = enabled;
 758         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 759         audio_notify_capture (cap, cmd);
 760     }
 761 }
 762
 763 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 764 {
 765     HWVoiceOut *hw = &cap->hw;
 766     SWVoiceOut *sw;
 767     int enabled = 0;
 768
 769     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 770         if (sw->active) {
 771             enabled = 1;
 772             break;
 773         }
 774     }
 775     audio_capture_maybe_changed (cap, enabled);
 776 }
 777
 778 static void audio_detach_capture (HWVoiceOut *hw)
 779 {
 780     SWVoiceCap *sc = hw->cap_head.lh_first;
 781
 782     while (sc) {
 783         SWVoiceCap *sc1 = sc->entries.le_next;
 784         SWVoiceOut *sw = &sc->sw;
 785         CaptureVoiceOut *cap = sc->cap;
 786         int was_active = sw->active;
 787
 788         if (sw->rate) {
 789             st_rate_stop (sw->rate);
 790             sw->rate = NULL;
 791         }
 792
 793         LIST_REMOVE (sw, entries);
 794         LIST_REMOVE (sc, entries);
 795         qemu_free (sc);
 796         if (was_active) {
 797             /* We have removed soft voice from the capture:
 798                this might have changed the overall status of the capture
 799                since this might have been the only active voice */
 800             audio_recalc_and_notify_capture (cap);
 801         }
 802         sc = sc1;
 803     }
 804 }
 805
 806 static int audio_attach_capture (AudioState *s, HWVoiceOut *hw)
 807 {
 808     CaptureVoiceOut *cap;
 809
 810     audio_detach_capture (hw);
 811     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 812         SWVoiceCap *sc;
 813         SWVoiceOut *sw;
 814         HWVoiceOut *hw_cap = &cap->hw;
 815
 816         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 817         if (!sc) {
 818             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 819                    sizeof (*sc));
 820             return -1;
 821         }
 822
 823         sc->cap = cap;
 824         sw = &sc->sw;
 825         sw->hw = hw_cap;
 826         sw->info = hw->info;
 827         sw->empty = 1;
 828         sw->active = hw->enabled;
 829         sw->conv = noop_conv;
 830         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 831         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 832         if (!sw->rate) {
 833             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 834             qemu_free (sw);
 835             return -1;
 836         }
 837         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 838         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 839 #ifdef DEBUG_CAPTURE
 840         asprintf (&sw->name, "for %p %d,%d,%d",
 841                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 842         dolog ("Added %s active = %d\n", sw->name, sw->active);
 843 #endif
 844         if (sw->active) {
 845             audio_capture_maybe_changed (cap, 1);
 846         }
 847     }
 848     return 0;
 849 }
 850
 851 /*
 852  * Hard voice (capture)
 853  */
 854 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 855 {
 856     SWVoiceIn *sw;
 857     int m = hw->total_samples_captured;
 858
 859     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 860         if (sw->active) {
 861             m = audio_MIN (m, sw->total_hw_samples_acquired);
 862         }
 863     }
 864     return m;
 865 }
 866
 867 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 868 {
 869     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 870     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 871         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 872         return 0;
 873     }
 874     return live;
 875 }
 876
 877 /*
 878  * Soft voice (capture)
 879  */
 880 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 881 {
 882     HWVoiceIn *hw = sw->hw;
 883     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 884     int rpos;
 885
 886     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 887         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 888         return 0;
 889     }
 890
 891     rpos = hw->wpos - live;
 892     if (rpos >= 0) {
 893         return rpos;
 894     }
 895     else {
 896         return hw->samples + rpos;
 897     }
 898 }
 899
 900 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 901 {
 902     HWVoiceIn *hw = sw->hw;
 903     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 904     st_sample_t *src, *dst = sw->buf;
 905
 906     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 907
 908     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 909     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 910         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 911         return 0;
 912     }
 913
 914     samples = size >> sw->info.shift;
 915     if (!live) {
 916         return 0;
 917     }
 918
 919     swlim = (live * sw->ratio) >> 32;
 920     swlim = audio_MIN (swlim, samples);
 921
 922     while (swlim) {
 923         src = hw->conv_buf + rpos;
 924         isamp = hw->wpos - rpos;
 925         /* XXX: <= ? */
 926         if (isamp <= 0) {
 927             isamp = hw->samples - rpos;
 928         }
 929
 930         if (!isamp) {
 931             break;
 932         }
 933         osamp = swlim;
 934
 935         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 936             dolog ("osamp=%d\n", osamp);
 937             return 0;
 938         }
 939
 940         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 941         swlim -= osamp;
 942         rpos = (rpos + isamp) % hw->samples;
 943         dst += osamp;
 944         ret += osamp;
 945         total += isamp;
 946     }
 947
 948     sw->clip (buf, sw->buf, ret);
 949     sw->total_hw_samples_acquired += total;
 950     return ret << sw->info.shift;
 951 }
 952
 953 /*
 954  * Hard voice (playback)
 955  */
 956 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 957 {
 958     SWVoiceOut *sw;
 959     int m = INT_MAX;
 960     int nb_live = 0;
 961
 962     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 963         if (sw->active || !sw->empty) {
 964             m = audio_MIN (m, sw->total_hw_samples_mixed);
 965             nb_live += 1;
 966         }
 967     }
 968
 969     *nb_livep = nb_live;
 970     return m;
 971 }
 972
 973 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 974 {
 975     int smin;
 976
 977     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 978
 979     if (!*nb_live) {
 980         return 0;
 981     }
 982     else {
 983         int live = smin;
 984
 985         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 986             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 987             return 0;
 988         }
 989         return live;
 990     }
 991 }
 992
 993 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 994 {
 995     int nb_live;
 996     int live;
 997
 998     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 999     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1000         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1001         return 0;
1002     }
1003     return live;
1004 }
1005
1006 /*
1007  * Soft voice (playback)
1008  */
1009 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1010 {
1011     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1012     int ret = 0, pos = 0, total = 0;
1013
1014     if (!sw) {
1015         return size;
1016     }
1017
1018     hwsamples = sw->hw->samples;
1019
1020     live = sw->total_hw_samples_mixed;
1021     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1022         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1023         return 0;
1024     }
1025
1026     if (live == hwsamples) {
1027 #ifdef DEBUG_OUT
1028         dolog ("%s is full %d\n", sw->name, live);
1029 #endif
1030         return 0;
1031     }
1032
1033     wpos = (sw->hw->rpos + live) % hwsamples;
1034     samples = size >> sw->info.shift;
1035
1036     dead = hwsamples - live;
1037     swlim = ((int64_t) dead << 32) / sw->ratio;
1038     swlim = audio_MIN (swlim, samples);
1039     if (swlim) {
1040         sw->conv (sw->buf, buf, swlim, &sw->vol);
1041     }
1042
1043     while (swlim) {
1044         dead = hwsamples - live;
1045         left = hwsamples - wpos;
1046         blck = audio_MIN (dead, left);
1047         if (!blck) {
1048             break;
1049         }
1050         isamp = swlim;
1051         osamp = blck;
1052         st_rate_flow_mix (
1053             sw->rate,
1054             sw->buf + pos,
1055             sw->hw->mix_buf + wpos,
1056             &isamp,
1057             &osamp
1058             );
1059         ret += isamp;
1060         swlim -= isamp;
1061         pos += isamp;
1062         live += osamp;
1063         wpos = (wpos + osamp) % hwsamples;
1064         total += osamp;
1065     }
1066
1067     sw->total_hw_samples_mixed += total;
1068     sw->empty = sw->total_hw_samples_mixed == 0;
1069
1070 #ifdef DEBUG_OUT
1071     dolog (
1072         "%s: write size %d ret %d total sw %d\n",
1073         SW_NAME (sw),
1074         size >> sw->info.shift,
1075         ret,
1076         sw->total_hw_samples_mixed
1077         );
1078 #endif
1079
1080     return ret << sw->info.shift;
1081 }
1082
1083 #ifdef DEBUG_AUDIO
1084 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1085 {
1086     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1087            cap, info->bits, info->sign, info->freq, info->nchannels);
1088 }
1089 #endif
1090
1091 #define DAC
1092 #include "audio_template.h"
1093 #undef DAC
1094 #include "audio_template.h"
1095
1096 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1097 {
1098     int bytes;
1099
1100     if (!sw) {
1101         /* XXX: Consider options */
1102         return size;
1103     }
1104
1105     if (!sw->hw->enabled) {
1106         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1107         return 0;
1108     }
1109
1110     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1111     return bytes;
1112 }
1113
1114 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1115 {
1116     int bytes;
1117
1118     if (!sw) {
1119         /* XXX: Consider options */
1120         return size;
1121     }
1122
1123     if (!sw->hw->enabled) {
1124         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1125         return 0;
1126     }
1127
1128     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1129     return bytes;
1130 }
1131
1132 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1133 {
1134     return sw->hw->samples << sw->hw->info.shift;
1135 }
1136
1137 void AUD_set_active_out (SWVoiceOut *sw, int on)
1138 {
1139     HWVoiceOut *hw;
1140
1141     if (!sw) {
1142         return;
1143     }
1144
1145     hw = sw->hw;
1146     if (sw->active != on) {
1147         SWVoiceOut *temp_sw;
1148         SWVoiceCap *sc;
1149
1150         if (on) {
1151             hw->pending_disable = 0;
1152             if (!hw->enabled) {
1153                 hw->enabled = 1;
1154                 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1155             }
1156         }
1157         else {
1158             if (hw->enabled) {
1159                 int nb_active = 0;
1160
1161                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1162                      temp_sw = temp_sw->entries.le_next) {
1163                     nb_active += temp_sw->active != 0;
1164                 }
1165
1166                 hw->pending_disable = nb_active == 1;
1167             }
1168         }
1169
1170         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1171             sc->sw.active = hw->enabled;
1172             if (hw->enabled) {
1173                 audio_capture_maybe_changed (sc->cap, 1);
1174             }
1175         }
1176         sw->active = on;
1177     }
1178 }
1179
1180 void AUD_set_active_in (SWVoiceIn *sw, int on)
1181 {
1182     HWVoiceIn *hw;
1183
1184     if (!sw) {
1185         return;
1186     }
1187
1188     hw = sw->hw;
1189     if (sw->active != on) {
1190         SWVoiceIn *temp_sw;
1191
1192         if (on) {
1193             if (!hw->enabled) {
1194                 hw->enabled = 1;
1195                 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1196             }
1197             sw->total_hw_samples_acquired = hw->total_samples_captured;
1198         }
1199         else {
1200             if (hw->enabled) {
1201                 int nb_active = 0;
1202
1203                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1204                      temp_sw = temp_sw->entries.le_next) {
1205                     nb_active += temp_sw->active != 0;
1206                 }
1207
1208                 if (nb_active == 1) {
1209                     hw->enabled = 0;
1210                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1211                 }
1212             }
1213         }
1214         sw->active = on;
1215     }
1216 }
1217
1218 static int audio_get_avail (SWVoiceIn *sw)
1219 {
1220     int live;
1221
1222     if (!sw) {
1223         return 0;
1224     }
1225
1226     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1227     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1228         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1229         return 0;
1230     }
1231
1232     ldebug (
1233         "%s: get_avail live %d ret %" PRId64 "\n",
1234         SW_NAME (sw),
1235         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1236         );
1237
1238     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1239 }
1240
1241 static int audio_get_free (SWVoiceOut *sw)
1242 {
1243     int live, dead;
1244
1245     if (!sw) {
1246         return 0;
1247     }
1248
1249     live = sw->total_hw_samples_mixed;
1250
1251     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1252         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1253         return 0;
1254     }
1255
1256     dead = sw->hw->samples - live;
1257
1258 #ifdef DEBUG_OUT
1259     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1260            SW_NAME (sw),
1261            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1262 #endif
1263
1264     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1265 }
1266
1267 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1268 {
1269     int n;
1270
1271     if (hw->enabled) {
1272         SWVoiceCap *sc;
1273
1274         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1275             SWVoiceOut *sw = &sc->sw;
1276             int rpos2 = rpos;
1277
1278             n = samples;
1279             while (n) {
1280                 int till_end_of_hw = hw->samples - rpos2;
1281                 int to_write = audio_MIN (till_end_of_hw, n);
1282                 int bytes = to_write << hw->info.shift;
1283                 int written;
1284
1285                 sw->buf = hw->mix_buf + rpos2;
1286                 written = audio_pcm_sw_write (sw, NULL, bytes);
1287                 if (written - bytes) {
1288                     dolog ("Could not mix %d bytes into a capture "
1289                            "buffer, mixed %d\n",
1290                            bytes, written);
1291                     break;
1292                 }
1293                 n -= to_write;
1294                 rpos2 = (rpos2 + to_write) % hw->samples;
1295             }
1296         }
1297     }
1298
1299     n = audio_MIN (samples, hw->samples - rpos);
1300     mixeng_clear (hw->mix_buf + rpos, n);
1301     mixeng_clear (hw->mix_buf, samples - n);
1302 }
1303
1304 static void audio_run_out (AudioState *s)
1305 {
1306     HWVoiceOut *hw = NULL;
1307     SWVoiceOut *sw;
1308
1309     while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1310         int played;
1311         int live, free, nb_live, cleanup_required, prev_rpos;
1312
1313         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1314         if (!nb_live) {
1315             live = 0;
1316         }
1317
1318         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1319             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1320             continue;
1321         }
1322
1323         if (hw->pending_disable && !nb_live) {
1324             SWVoiceCap *sc;
1325 #ifdef DEBUG_OUT
1326             dolog ("Disabling voice\n");
1327 #endif
1328             hw->enabled = 0;
1329             hw->pending_disable = 0;
1330             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1331             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1332                 sc->sw.active = 0;
1333                 audio_recalc_and_notify_capture (sc->cap);
1334             }
1335             continue;
1336         }
1337
1338         if (!live) {
1339             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1340                 if (sw->active) {
1341                     free = audio_get_free (sw);
1342                     if (free > 0) {
1343                         sw->callback.fn (sw->callback.opaque, free);
1344                     }
1345                 }
1346             }
1347             continue;
1348         }
1349
1350         prev_rpos = hw->rpos;
1351         played = hw->pcm_ops->run_out (hw);
1352         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1353             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1354                    hw->rpos, hw->samples, played);
1355             hw->rpos = 0;
1356         }
1357
1358 #ifdef DEBUG_OUT
1359         dolog ("played=%d\n", played);
1360 #endif
1361
1362         if (played) {
1363             hw->ts_helper += played;
1364             audio_capture_mix_and_clear (hw, prev_rpos, played);
1365         }
1366
1367         cleanup_required = 0;
1368         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1369             if (!sw->active && sw->empty) {
1370                 continue;
1371             }
1372
1373             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1374                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1375                        played, sw->total_hw_samples_mixed);
1376                 played = sw->total_hw_samples_mixed;
1377             }
1378
1379             sw->total_hw_samples_mixed -= played;
1380
1381             if (!sw->total_hw_samples_mixed) {
1382                 sw->empty = 1;
1383                 cleanup_required |= !sw->active && !sw->callback.fn;
1384             }
1385
1386             if (sw->active) {
1387                 free = audio_get_free (sw);
1388                 if (free > 0) {
1389                     sw->callback.fn (sw->callback.opaque, free);
1390                 }
1391             }
1392         }
1393
1394         if (cleanup_required) {
1395             SWVoiceOut *sw1;
1396
1397             sw = hw->sw_head.lh_first;
1398             while (sw) {
1399                 sw1 = sw->entries.le_next;
1400                 if (!sw->active && !sw->callback.fn) {
1401 #ifdef DEBUG_PLIVE
1402                     dolog ("Finishing with old voice\n");
1403 #endif
1404                     audio_close_out (s, sw);
1405                 }
1406                 sw = sw1;
1407             }
1408         }
1409     }
1410 }
1411
1412 static void audio_run_in (AudioState *s)
1413 {
1414     HWVoiceIn *hw = NULL;
1415
1416     while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1417         SWVoiceIn *sw;
1418         int captured, min;
1419
1420         captured = hw->pcm_ops->run_in (hw);
1421
1422         min = audio_pcm_hw_find_min_in (hw);
1423         hw->total_samples_captured += captured - min;
1424         hw->ts_helper += captured;
1425
1426         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1427             sw->total_hw_samples_acquired -= min;
1428
1429             if (sw->active) {
1430                 int avail;
1431
1432                 avail = audio_get_avail (sw);
1433                 if (avail > 0) {
1434                     sw->callback.fn (sw->callback.opaque, avail);
1435                 }
1436             }
1437         }
1438     }
1439 }
1440
1441 static void audio_run_capture (AudioState *s)
1442 {
1443     CaptureVoiceOut *cap;
1444
1445     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1446         int live, rpos, captured;
1447         HWVoiceOut *hw = &cap->hw;
1448         SWVoiceOut *sw;
1449
1450         captured = live = audio_pcm_hw_get_live_out (hw);
1451         rpos = hw->rpos;
1452         while (live) {
1453             int left = hw->samples - rpos;
1454             int to_capture = audio_MIN (live, left);
1455             st_sample_t *src;
1456             struct capture_callback *cb;
1457
1458             src = hw->mix_buf + rpos;
1459             hw->clip (cap->buf, src, to_capture);
1460             mixeng_clear (src, to_capture);
1461
1462             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1463                 cb->ops.capture (cb->opaque, cap->buf,
1464                                  to_capture << hw->info.shift);
1465             }
1466             rpos = (rpos + to_capture) % hw->samples;
1467             live -= to_capture;
1468         }
1469         hw->rpos = rpos;
1470
1471         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1472             if (!sw->active && sw->empty) {
1473                 continue;
1474             }
1475
1476             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1477                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1478                        captured, sw->total_hw_samples_mixed);
1479                 captured = sw->total_hw_samples_mixed;
1480             }
1481
1482             sw->total_hw_samples_mixed -= captured;
1483             sw->empty = sw->total_hw_samples_mixed == 0;
1484         }
1485     }
1486 }
1487
1488 static void audio_timer (void *opaque)
1489 {
1490     AudioState *s = opaque;
1491
1492     audio_run_out (s);
1493     audio_run_in (s);
1494     audio_run_capture (s);
1495
1496     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1497 }
1498
1499 static struct audio_option audio_options[] = {
1500     /* DAC */
1501     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1502      "Use fixed settings for host DAC", NULL, 0},
1503
1504     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1505      "Frequency for fixed host DAC", NULL, 0},
1506
1507     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1508      "Format for fixed host DAC", NULL, 0},
1509
1510     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1511      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1512
1513     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1514      "Number of voices for DAC", NULL, 0},
1515
1516     /* ADC */
1517     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1518      "Use fixed settings for host ADC", NULL, 0},
1519
1520     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1521      "Frequency for fixed host ADC", NULL, 0},
1522
1523     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1524      "Format for fixed host ADC", NULL, 0},
1525
1526     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1527      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1528
1529     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1530      "Number of voices for ADC", NULL, 0},
1531
1532     /* Misc */
1533     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
1534      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1535
1536     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1537      "(undocumented)", NULL, 0},
1538
1539     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1540      "print logging messages to montior instead of stderr", NULL, 0},
1541
1542     {NULL, 0, NULL, NULL, NULL, 0}
1543 };
1544
1545 static void audio_pp_nb_voices (const char *typ, int nb)
1546 {
1547     switch (nb) {
1548     case 0:
1549         printf ("Does not support %s\n", typ);
1550         break;
1551     case 1:
1552         printf ("One %s voice\n", typ);
1553         break;
1554     case INT_MAX:
1555         printf ("Theoretically supports many %s voices\n", typ);
1556         break;
1557     default:
1558         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1559         break;
1560     }
1561
1562 }
1563
1564 void AUD_help (void)
1565 {
1566     size_t i;
1567
1568     audio_process_options ("AUDIO", audio_options);
1569     for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1570         struct audio_driver *d = drvtab[i];
1571         if (d->options) {
1572             audio_process_options (d->name, d->options);
1573         }
1574     }
1575
1576     printf ("Audio options:\n");
1577     audio_print_options ("AUDIO", audio_options);
1578     printf ("\n");
1579
1580     printf ("Available drivers:\n");
1581
1582     for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1583         struct audio_driver *d = drvtab[i];
1584
1585         printf ("Name: %s\n", d->name);
1586         printf ("Description: %s\n", d->descr);
1587
1588         audio_pp_nb_voices ("playback", d->max_voices_out);
1589         audio_pp_nb_voices ("capture", d->max_voices_in);
1590
1591         if (d->options) {
1592             printf ("Options:\n");
1593             audio_print_options (d->name, d->options);
1594         }
1595         else {
1596             printf ("No options\n");
1597         }
1598         printf ("\n");
1599     }
1600
1601     printf (
1602         "Options are settable through environment variables.\n"
1603         "Example:\n"
1604 #ifdef _WIN32
1605         "  set QEMU_AUDIO_DRV=wav\n"
1606         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1607 #else
1608         "  export QEMU_AUDIO_DRV=wav\n"
1609         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1610         "(for csh replace export with setenv in the above)\n"
1611 #endif
1612         "  qemu ...\n\n"
1613         );
1614 }
1615
1616 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1617 {
1618     if (drv->options) {
1619         audio_process_options (drv->name, drv->options);
1620     }
1621     s->drv_opaque = drv->init ();
1622
1623     if (s->drv_opaque) {
1624         audio_init_nb_voices_out (s, drv);
1625         audio_init_nb_voices_in (s, drv);
1626         s->drv = drv;
1627         return 0;
1628     }
1629     else {
1630         dolog ("Could not init `%s' audio driver\n", drv->name);
1631         return -1;
1632     }
1633 }
1634
1635 static void audio_vm_change_state_handler (void *opaque, int running)
1636 {
1637     AudioState *s = opaque;
1638     HWVoiceOut *hwo = NULL;
1639     HWVoiceIn *hwi = NULL;
1640     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1641
1642     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1643         hwo->pcm_ops->ctl_out (hwo, op);
1644     }
1645
1646     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1647         hwi->pcm_ops->ctl_in (hwi, op);
1648     }
1649 }
1650
1651 static void audio_atexit (void)
1652 {
1653     AudioState *s = &glob_audio_state;
1654     HWVoiceOut *hwo = NULL;
1655     HWVoiceIn *hwi = NULL;
1656
1657     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1658         SWVoiceCap *sc;
1659
1660         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1661         hwo->pcm_ops->fini_out (hwo);
1662
1663         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1664             CaptureVoiceOut *cap = sc->cap;
1665             struct capture_callback *cb;
1666
1667             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1668                 cb->ops.destroy (cb->opaque);
1669             }
1670         }
1671     }
1672
1673     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1674         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1675         hwi->pcm_ops->fini_in (hwi);
1676     }
1677
1678     if (s->drv) {
1679         s->drv->fini (s->drv_opaque);
1680     }
1681 }
1682
1683 static void audio_save (QEMUFile *f, void *opaque)
1684 {
1685     (void) f;
1686     (void) opaque;
1687 }
1688
1689 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1690 {
1691     (void) f;
1692     (void) opaque;
1693
1694     if (version_id != 1) {
1695         return -EINVAL;
1696     }
1697
1698     return 0;
1699 }
1700
1701 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1702 {
1703     card->audio = s;
1704     card->name = qemu_strdup (name);
1705     memset (&card->entries, 0, sizeof (card->entries));
1706     LIST_INSERT_HEAD (&s->card_head, card, entries);
1707 }
1708
1709 void AUD_remove_card (QEMUSoundCard *card)
1710 {
1711     LIST_REMOVE (card, entries);
1712     card->audio = NULL;
1713     qemu_free (card->name);
1714 }
1715
1716 AudioState *AUD_init (void)
1717 {
1718     size_t i;
1719     int done = 0;
1720     const char *drvname;
1721     AudioState *s = &glob_audio_state;
1722
1723     LIST_INIT (&s->hw_head_out);
1724     LIST_INIT (&s->hw_head_in);
1725     LIST_INIT (&s->cap_head);
1726     atexit (audio_atexit);
1727
1728     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1729     if (!s->ts) {
1730         dolog ("Could not create audio timer\n");
1731         return NULL;
1732     }
1733
1734     audio_process_options ("AUDIO", audio_options);
1735
1736     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1737     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1738
1739     if (s->nb_hw_voices_out <= 0) {
1740         dolog ("Bogus number of playback voices %d, setting to 1\n",
1741                s->nb_hw_voices_out);
1742         s->nb_hw_voices_out = 1;
1743     }
1744
1745     if (s->nb_hw_voices_in <= 0) {
1746         dolog ("Bogus number of capture voices %d, setting to 0\n",
1747                s->nb_hw_voices_in);
1748         s->nb_hw_voices_in = 0;
1749     }
1750
1751     {
1752         int def;
1753         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1754     }
1755
1756     if (drvname) {
1757         int found = 0;
1758
1759         for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1760             if (!strcmp (drvname, drvtab[i]->name)) {
1761                 done = !audio_driver_init (s, drvtab[i]);
1762                 found = 1;
1763                 break;
1764             }
1765         }
1766
1767         if (!found) {
1768             dolog ("Unknown audio driver `%s'\n", drvname);
1769             dolog ("Run with -audio-help to list available drivers\n");
1770         }
1771     }
1772
1773     if (!done) {
1774         for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1775             if (drvtab[i]->can_be_default) {
1776                 done = !audio_driver_init (s, drvtab[i]);
1777             }
1778         }
1779     }
1780
1781     if (!done) {
1782         done = !audio_driver_init (s, &no_audio_driver);
1783         if (!done) {
1784             dolog ("Could not initialize audio subsystem\n");
1785         }
1786         else {
1787             dolog ("warning: Using timer based audio emulation\n");
1788         }
1789     }
1790
1791     if (done) {
1792         VMChangeStateEntry *e;
1793
1794         if (conf.period.hz <= 0) {
1795             if (conf.period.hz < 0) {
1796                 dolog ("warning: Timer period is negative - %d "
1797                        "treating as zero\n",
1798                        conf.period.hz);
1799             }
1800             conf.period.ticks = 1;
1801         }
1802         else {
1803             conf.period.ticks = ticks_per_sec / conf.period.hz;
1804         }
1805
1806         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1807         if (!e) {
1808             dolog ("warning: Could not register change state handler\n"
1809                    "(Audio can continue looping even after stopping the VM)\n");
1810         }
1811     }
1812     else {
1813         qemu_del_timer (s->ts);
1814         return NULL;
1815     }
1816
1817     LIST_INIT (&s->card_head);
1818     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1819     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1820     return s;
1821 }
1822
1823 CaptureVoiceOut *AUD_add_capture (
1824     AudioState *s,
1825     audsettings_t *as,
1826     struct audio_capture_ops *ops,
1827     void *cb_opaque
1828     )
1829 {
1830     CaptureVoiceOut *cap;
1831     struct capture_callback *cb;
1832
1833     if (!s) {
1834         /* XXX suppress */
1835         s = &glob_audio_state;
1836     }
1837
1838     if (audio_validate_settings (as)) {
1839         dolog ("Invalid settings were passed when trying to add capture\n");
1840         audio_print_settings (as);
1841         goto err0;
1842     }
1843
1844     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1845     if (!cb) {
1846         dolog ("Could not allocate capture callback information, size %zu\n",
1847                sizeof (*cb));
1848         goto err0;
1849     }
1850     cb->ops = *ops;
1851     cb->opaque = cb_opaque;
1852
1853     cap = audio_pcm_capture_find_specific (s, as);
1854     if (cap) {
1855         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1856         return cap;
1857     }
1858     else {
1859         HWVoiceOut *hw;
1860         CaptureVoiceOut *cap;
1861
1862         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1863         if (!cap) {
1864             dolog ("Could not allocate capture voice, size %zu\n",
1865                    sizeof (*cap));
1866             goto err1;
1867         }
1868
1869         hw = &cap->hw;
1870         LIST_INIT (&hw->sw_head);
1871         LIST_INIT (&cap->cb_head);
1872
1873         /* XXX find a more elegant way */
1874         hw->samples = 4096 * 4;
1875         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1876                                     sizeof (st_sample_t));
1877         if (!hw->mix_buf) {
1878             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1879                    hw->samples);
1880             goto err2;
1881         }
1882
1883         audio_pcm_init_info (&hw->info, as);
1884
1885         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1886         if (!cap->buf) {
1887             dolog ("Could not allocate capture buffer "
1888                    "(%d samples, each %d bytes)\n",
1889                    hw->samples, 1 << hw->info.shift);
1890             goto err3;
1891         }
1892
1893         hw->clip = mixeng_clip
1894             [hw->info.nchannels == 2]
1895             [hw->info.sign]
1896             [hw->info.swap_endianness]
1897             [audio_bits_to_index (hw->info.bits)];
1898
1899         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1900         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1901
1902         hw = NULL;
1903         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1904             audio_attach_capture (s, hw);
1905         }
1906         return cap;
1907
1908     err3:
1909         qemu_free (cap->hw.mix_buf);
1910     err2:
1911         qemu_free (cap);
1912     err1:
1913         qemu_free (cb);
1914     err0:
1915         return NULL;
1916     }
1917 }
1918
1919 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1920 {
1921     struct capture_callback *cb;
1922
1923     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1924         if (cb->opaque == cb_opaque) {
1925             cb->ops.destroy (cb_opaque);
1926             LIST_REMOVE (cb, entries);
1927             qemu_free (cb);
1928
1929             if (!cap->cb_head.lh_first) {
1930                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1931
1932                 while (sw) {
1933                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1934 #ifdef DEBUG_CAPTURE
1935                     dolog ("freeing %s\n", sw->name);
1936 #endif
1937
1938                     sw1 = sw->entries.le_next;
1939                     if (sw->rate) {
1940                         st_rate_stop (sw->rate);
1941                         sw->rate = NULL;
1942                     }
1943                     LIST_REMOVE (sw, entries);
1944                     LIST_REMOVE (sc, entries);
1945                     qemu_free (sc);
1946                     sw = sw1;
1947                 }
1948                 LIST_REMOVE (cap, entries);
1949                 qemu_free (cap);
1950             }
1951             return;
1952         }
1953     }
1954 }