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 static struct audio_driver *drvtab[] = {
  41     AUDIO_DRIVERS
  42     &no_audio_driver,
  43     &wav_audio_driver
  44 };
  45
  46 struct fixed_settings {
  47     int enabled;
  48     int nb_voices;
  49     int greedy;
  50     struct audsettings settings;
  51 };
  52
  53 static struct {
  54     struct fixed_settings fixed_out;
  55     struct fixed_settings fixed_in;
  56     union {
  57         int hertz;
  58         int64_t ticks;
  59     } period;
  60     int plive;
  61     int log_to_monitor;
  62 } conf = {
  63     {                           /* DAC fixed settings */
  64         1,                      /* enabled */
  65         1,                      /* nb_voices */
  66         1,                      /* greedy */
  67         {
  68             44100,              /* freq */
  69             2,                  /* nchannels */
  70             AUD_FMT_S16,        /* fmt */
  71             AUDIO_HOST_ENDIANNESS
  72         }
  73     },
  74
  75     {                           /* ADC fixed settings */
  76         1,                      /* enabled */
  77         1,                      /* nb_voices */
  78         1,                      /* greedy */
  79         {
  80             44100,              /* freq */
  81             2,                  /* nchannels */
  82             AUD_FMT_S16,        /* fmt */
  83             AUDIO_HOST_ENDIANNESS
  84         }
  85     },
  86
  87     { 250 },                    /* period */
  88     0,                          /* plive */
  89     0                           /* log_to_monitor */
  90 };
  91
  92 static AudioState glob_audio_state;
  93
  94 struct mixeng_volume nominal_volume = {
  95     0,
  96 #ifdef FLOAT_MIXENG
  97     1.0,
  98     1.0
  99 #else
 100     1ULL << 32,
 101     1ULL << 32
 102 #endif
 103 };
 104
 105 /* http://www.df.lth.se/~john_e/gems/gem002d.html */
 106 /* http://www.multi-platforms.com/Tips/PopCount.htm */
 107 uint32_t popcount (uint32_t u)
 108 {
 109     u = ((u&0x55555555) + ((u>>1)&0x55555555));
 110     u = ((u&0x33333333) + ((u>>2)&0x33333333));
 111     u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
 112     u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
 113     u = ( u&0x0000ffff) + (u>>16);
 114     return u;
 115 }
 116
 117 inline uint32_t lsbindex (uint32_t u)
 118 {
 119     return popcount ((u&-u)-1);
 120 }
 121
 122 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 123 #error No its not
 124 #else
 125 int audio_bug (const char *funcname, int cond)
 126 {
 127     if (cond) {
 128         static int shown;
 129
 130         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 131         if (!shown) {
 132             shown = 1;
 133             AUD_log (NULL, "Save all your work and restart without audio\n");
 134             AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
 135             AUD_log (NULL, "I am sorry\n");
 136         }
 137         AUD_log (NULL, "Context:\n");
 138
 139 #if defined AUDIO_BREAKPOINT_ON_BUG
 140 #  if defined HOST_I386
 141 #    if defined __GNUC__
 142         __asm__ ("int3");
 143 #    elif defined _MSC_VER
 144         _asm _emit 0xcc;
 145 #    else
 146         abort ();
 147 #    endif
 148 #  else
 149         abort ();
 150 #  endif
 151 #endif
 152     }
 153
 154     return cond;
 155 }
 156 #endif
 157
 158 static inline int audio_bits_to_index (int bits)
 159 {
 160     switch (bits) {
 161     case 8:
 162         return 0;
 163
 164     case 16:
 165         return 1;
 166
 167     case 32:
 168         return 2;
 169
 170     default:
 171         audio_bug ("bits_to_index", 1);
 172         AUD_log (NULL, "invalid bits %d\n", bits);
 173         return 0;
 174     }
 175 }
 176
 177 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 178 {
 179     int cond;
 180     size_t len;
 181
 182     len = nmemb * size;
 183     cond = !nmemb || !size;
 184     cond |= nmemb < 0;
 185     cond |= len < size;
 186
 187     if (audio_bug ("audio_calloc", cond)) {
 188         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 189                  funcname);
 190         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 191         return NULL;
 192     }
 193
 194     return qemu_mallocz (len);
 195 }
 196
 197 static char *audio_alloc_prefix (const char *s)
 198 {
 199     const char qemu_prefix[] = "QEMU_";
 200     size_t len, i;
 201     char *r, *u;
 202
 203     if (!s) {
 204         return NULL;
 205     }
 206
 207     len = strlen (s);
 208     r = qemu_malloc (len + sizeof (qemu_prefix));
 209
 210     u = r + sizeof (qemu_prefix) - 1;
 211
 212     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 213     pstrcat (r, len + sizeof (qemu_prefix), s);
 214
 215     for (i = 0; i < len; ++i) {
 216         u[i] = qemu_toupper(u[i]);
 217     }
 218
 219     return r;
 220 }
 221
 222 static const char *audio_audfmt_to_string (audfmt_e fmt)
 223 {
 224     switch (fmt) {
 225     case AUD_FMT_U8:
 226         return "U8";
 227
 228     case AUD_FMT_U16:
 229         return "U16";
 230
 231     case AUD_FMT_S8:
 232         return "S8";
 233
 234     case AUD_FMT_S16:
 235         return "S16";
 236
 237     case AUD_FMT_U32:
 238         return "U32";
 239
 240     case AUD_FMT_S32:
 241         return "S32";
 242     }
 243
 244     dolog ("Bogus audfmt %d returning S16\n", fmt);
 245     return "S16";
 246 }
 247
 248 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 249                                         int *defaultp)
 250 {
 251     if (!strcasecmp (s, "u8")) {
 252         *defaultp = 0;
 253         return AUD_FMT_U8;
 254     }
 255     else if (!strcasecmp (s, "u16")) {
 256         *defaultp = 0;
 257         return AUD_FMT_U16;
 258     }
 259     else if (!strcasecmp (s, "u32")) {
 260         *defaultp = 0;
 261         return AUD_FMT_U32;
 262     }
 263     else if (!strcasecmp (s, "s8")) {
 264         *defaultp = 0;
 265         return AUD_FMT_S8;
 266     }
 267     else if (!strcasecmp (s, "s16")) {
 268         *defaultp = 0;
 269         return AUD_FMT_S16;
 270     }
 271     else if (!strcasecmp (s, "s32")) {
 272         *defaultp = 0;
 273         return AUD_FMT_S32;
 274     }
 275     else {
 276         dolog ("Bogus audio format `%s' using %s\n",
 277                s, audio_audfmt_to_string (defval));
 278         *defaultp = 1;
 279         return defval;
 280     }
 281 }
 282
 283 static audfmt_e audio_get_conf_fmt (const char *envname,
 284                                     audfmt_e defval,
 285                                     int *defaultp)
 286 {
 287     const char *var = getenv (envname);
 288     if (!var) {
 289         *defaultp = 1;
 290         return defval;
 291     }
 292     return audio_string_to_audfmt (var, defval, defaultp);
 293 }
 294
 295 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 296 {
 297     int val;
 298     char *strval;
 299
 300     strval = getenv (key);
 301     if (strval) {
 302         *defaultp = 0;
 303         val = atoi (strval);
 304         return val;
 305     }
 306     else {
 307         *defaultp = 1;
 308         return defval;
 309     }
 310 }
 311
 312 static const char *audio_get_conf_str (const char *key,
 313                                        const char *defval,
 314                                        int *defaultp)
 315 {
 316     const char *val = getenv (key);
 317     if (!val) {
 318         *defaultp = 1;
 319         return defval;
 320     }
 321     else {
 322         *defaultp = 0;
 323         return val;
 324     }
 325 }
 326
 327 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 328 {
 329     if (conf.log_to_monitor) {
 330         if (cap) {
 331             monitor_printf(cur_mon, "%s: ", cap);
 332         }
 333
 334         monitor_vprintf(cur_mon, fmt, ap);
 335     }
 336     else {
 337         if (cap) {
 338             fprintf (stderr, "%s: ", cap);
 339         }
 340
 341         vfprintf (stderr, fmt, ap);
 342     }
 343 }
 344
 345 void AUD_log (const char *cap, const char *fmt, ...)
 346 {
 347     va_list ap;
 348
 349     va_start (ap, fmt);
 350     AUD_vlog (cap, fmt, ap);
 351     va_end (ap);
 352 }
 353
 354 static void audio_print_options (const char *prefix,
 355                                  struct audio_option *opt)
 356 {
 357     char *uprefix;
 358
 359     if (!prefix) {
 360         dolog ("No prefix specified\n");
 361         return;
 362     }
 363
 364     if (!opt) {
 365         dolog ("No options\n");
 366         return;
 367     }
 368
 369     uprefix = audio_alloc_prefix (prefix);
 370
 371     for (; opt->name; opt++) {
 372         const char *state = "default";
 373         printf ("  %s_%s: ", uprefix, opt->name);
 374
 375         if (opt->overriddenp && *opt->overriddenp) {
 376             state = "current";
 377         }
 378
 379         switch (opt->tag) {
 380         case AUD_OPT_BOOL:
 381             {
 382                 int *intp = opt->valp;
 383                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 384             }
 385             break;
 386
 387         case AUD_OPT_INT:
 388             {
 389                 int *intp = opt->valp;
 390                 printf ("integer, %s = %d\n", state, *intp);
 391             }
 392             break;
 393
 394         case AUD_OPT_FMT:
 395             {
 396                 audfmt_e *fmtp = opt->valp;
 397                 printf (
 398                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 399                     state,
 400                     audio_audfmt_to_string (*fmtp)
 401                     );
 402             }
 403             break;
 404
 405         case AUD_OPT_STR:
 406             {
 407                 const char **strp = opt->valp;
 408                 printf ("string, %s = %s\n",
 409                         state,
 410                         *strp ? *strp : "(not set)");
 411             }
 412             break;
 413
 414         default:
 415             printf ("???\n");
 416             dolog ("Bad value tag for option %s_%s %d\n",
 417                    uprefix, opt->name, opt->tag);
 418             break;
 419         }
 420         printf ("    %s\n", opt->descr);
 421     }
 422
 423     qemu_free (uprefix);
 424 }
 425
 426 static void audio_process_options (const char *prefix,
 427                                    struct audio_option *opt)
 428 {
 429     char *optname;
 430     const char qemu_prefix[] = "QEMU_";
 431     size_t preflen, optlen;
 432
 433     if (audio_bug (AUDIO_FUNC, !prefix)) {
 434         dolog ("prefix = NULL\n");
 435         return;
 436     }
 437
 438     if (audio_bug (AUDIO_FUNC, !opt)) {
 439         dolog ("opt = NULL\n");
 440         return;
 441     }
 442
 443     preflen = strlen (prefix);
 444
 445     for (; opt->name; opt++) {
 446         size_t len, i;
 447         int def;
 448
 449         if (!opt->valp) {
 450             dolog ("Option value pointer for `%s' is not set\n",
 451                    opt->name);
 452             continue;
 453         }
 454
 455         len = strlen (opt->name);
 456         /* len of opt->name + len of prefix + size of qemu_prefix
 457          * (includes trailing zero) + zero + underscore (on behalf of
 458          * sizeof) */
 459         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 460         optname = qemu_malloc (optlen);
 461
 462         pstrcpy (optname, optlen, qemu_prefix);
 463
 464         /* copy while upper-casing, including trailing zero */
 465         for (i = 0; i <= preflen; ++i) {
 466             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 467         }
 468         pstrcat (optname, optlen, "_");
 469         pstrcat (optname, optlen, opt->name);
 470
 471         def = 1;
 472         switch (opt->tag) {
 473         case AUD_OPT_BOOL:
 474         case AUD_OPT_INT:
 475             {
 476                 int *intp = opt->valp;
 477                 *intp = audio_get_conf_int (optname, *intp, &def);
 478             }
 479             break;
 480
 481         case AUD_OPT_FMT:
 482             {
 483                 audfmt_e *fmtp = opt->valp;
 484                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 485             }
 486             break;
 487
 488         case AUD_OPT_STR:
 489             {
 490                 const char **strp = opt->valp;
 491                 *strp = audio_get_conf_str (optname, *strp, &def);
 492             }
 493             break;
 494
 495         default:
 496             dolog ("Bad value tag for option `%s' - %d\n",
 497                    optname, opt->tag);
 498             break;
 499         }
 500
 501         if (!opt->overriddenp) {
 502             opt->overriddenp = &opt->overridden;
 503         }
 504         *opt->overriddenp = !def;
 505         qemu_free (optname);
 506     }
 507 }
 508
 509 static void audio_print_settings (struct audsettings *as)
 510 {
 511     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 512
 513     switch (as->fmt) {
 514     case AUD_FMT_S8:
 515         AUD_log (NULL, "S8");
 516         break;
 517     case AUD_FMT_U8:
 518         AUD_log (NULL, "U8");
 519         break;
 520     case AUD_FMT_S16:
 521         AUD_log (NULL, "S16");
 522         break;
 523     case AUD_FMT_U16:
 524         AUD_log (NULL, "U16");
 525         break;
 526     case AUD_FMT_S32:
 527         AUD_log (NULL, "S32");
 528         break;
 529     case AUD_FMT_U32:
 530         AUD_log (NULL, "U32");
 531         break;
 532     default:
 533         AUD_log (NULL, "invalid(%d)", as->fmt);
 534         break;
 535     }
 536
 537     AUD_log (NULL, " endianness=");
 538     switch (as->endianness) {
 539     case 0:
 540         AUD_log (NULL, "little");
 541         break;
 542     case 1:
 543         AUD_log (NULL, "big");
 544         break;
 545     default:
 546         AUD_log (NULL, "invalid");
 547         break;
 548     }
 549     AUD_log (NULL, "\n");
 550 }
 551
 552 static int audio_validate_settings (struct audsettings *as)
 553 {
 554     int invalid;
 555
 556     invalid = as->nchannels != 1 && as->nchannels != 2;
 557     invalid |= as->endianness != 0 && as->endianness != 1;
 558
 559     switch (as->fmt) {
 560     case AUD_FMT_S8:
 561     case AUD_FMT_U8:
 562     case AUD_FMT_S16:
 563     case AUD_FMT_U16:
 564     case AUD_FMT_S32:
 565     case AUD_FMT_U32:
 566         break;
 567     default:
 568         invalid = 1;
 569         break;
 570     }
 571
 572     invalid |= as->freq <= 0;
 573     return invalid ? -1 : 0;
 574 }
 575
 576 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 577 {
 578     int bits = 8, sign = 0;
 579
 580     switch (as->fmt) {
 581     case AUD_FMT_S8:
 582         sign = 1;
 583     case AUD_FMT_U8:
 584         break;
 585
 586     case AUD_FMT_S16:
 587         sign = 1;
 588     case AUD_FMT_U16:
 589         bits = 16;
 590         break;
 591
 592     case AUD_FMT_S32:
 593         sign = 1;
 594     case AUD_FMT_U32:
 595         bits = 32;
 596         break;
 597     }
 598     return info->freq == as->freq
 599         && info->nchannels == as->nchannels
 600         && info->sign == sign
 601         && info->bits == bits
 602         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 603 }
 604
 605 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 606 {
 607     int bits = 8, sign = 0, shift = 0;
 608
 609     switch (as->fmt) {
 610     case AUD_FMT_S8:
 611         sign = 1;
 612     case AUD_FMT_U8:
 613         break;
 614
 615     case AUD_FMT_S16:
 616         sign = 1;
 617     case AUD_FMT_U16:
 618         bits = 16;
 619         shift = 1;
 620         break;
 621
 622     case AUD_FMT_S32:
 623         sign = 1;
 624     case AUD_FMT_U32:
 625         bits = 32;
 626         shift = 2;
 627         break;
 628     }
 629
 630     info->freq = as->freq;
 631     info->bits = bits;
 632     info->sign = sign;
 633     info->nchannels = as->nchannels;
 634     info->shift = (as->nchannels == 2) + shift;
 635     info->align = (1 << info->shift) - 1;
 636     info->bytes_per_second = info->freq << info->shift;
 637     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 638 }
 639
 640 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 641 {
 642     if (!len) {
 643         return;
 644     }
 645
 646     if (info->sign) {
 647         memset (buf, 0x00, len << info->shift);
 648     }
 649     else {
 650         switch (info->bits) {
 651         case 8:
 652             memset (buf, 0x80, len << info->shift);
 653             break;
 654
 655         case 16:
 656             {
 657                 int i;
 658                 uint16_t *p = buf;
 659                 int shift = info->nchannels - 1;
 660                 short s = INT16_MAX;
 661
 662                 if (info->swap_endianness) {
 663                     s = bswap16 (s);
 664                 }
 665
 666                 for (i = 0; i < len << shift; i++) {
 667                     p[i] = s;
 668                 }
 669             }
 670             break;
 671
 672         case 32:
 673             {
 674                 int i;
 675                 uint32_t *p = buf;
 676                 int shift = info->nchannels - 1;
 677                 int32_t s = INT32_MAX;
 678
 679                 if (info->swap_endianness) {
 680                     s = bswap32 (s);
 681                 }
 682
 683                 for (i = 0; i < len << shift; i++) {
 684                     p[i] = s;
 685                 }
 686             }
 687             break;
 688
 689         default:
 690             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 691                      info->bits);
 692             break;
 693         }
 694     }
 695 }
 696
 697 /*
 698  * Capture
 699  */
 700 static void noop_conv (struct st_sample *dst, const void *src,
 701                        int samples, struct mixeng_volume *vol)
 702 {
 703     (void) src;
 704     (void) dst;
 705     (void) samples;
 706     (void) vol;
 707 }
 708
 709 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 710     struct audsettings *as
 711     )
 712 {
 713     CaptureVoiceOut *cap;
 714     AudioState *s = &glob_audio_state;
 715
 716     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 717         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 718             return cap;
 719         }
 720     }
 721     return NULL;
 722 }
 723
 724 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 725 {
 726     struct capture_callback *cb;
 727
 728 #ifdef DEBUG_CAPTURE
 729     dolog ("notification %d sent\n", cmd);
 730 #endif
 731     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 732         cb->ops.notify (cb->opaque, cmd);
 733     }
 734 }
 735
 736 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 737 {
 738     if (cap->hw.enabled != enabled) {
 739         audcnotification_e cmd;
 740         cap->hw.enabled = enabled;
 741         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 742         audio_notify_capture (cap, cmd);
 743     }
 744 }
 745
 746 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 747 {
 748     HWVoiceOut *hw = &cap->hw;
 749     SWVoiceOut *sw;
 750     int enabled = 0;
 751
 752     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 753         if (sw->active) {
 754             enabled = 1;
 755             break;
 756         }
 757     }
 758     audio_capture_maybe_changed (cap, enabled);
 759 }
 760
 761 static void audio_detach_capture (HWVoiceOut *hw)
 762 {
 763     SWVoiceCap *sc = hw->cap_head.lh_first;
 764
 765     while (sc) {
 766         SWVoiceCap *sc1 = sc->entries.le_next;
 767         SWVoiceOut *sw = &sc->sw;
 768         CaptureVoiceOut *cap = sc->cap;
 769         int was_active = sw->active;
 770
 771         if (sw->rate) {
 772             st_rate_stop (sw->rate);
 773             sw->rate = NULL;
 774         }
 775
 776         LIST_REMOVE (sw, entries);
 777         LIST_REMOVE (sc, entries);
 778         qemu_free (sc);
 779         if (was_active) {
 780             /* We have removed soft voice from the capture:
 781                this might have changed the overall status of the capture
 782                since this might have been the only active voice */
 783             audio_recalc_and_notify_capture (cap);
 784         }
 785         sc = sc1;
 786     }
 787 }
 788
 789 static int audio_attach_capture (HWVoiceOut *hw)
 790 {
 791     AudioState *s = &glob_audio_state;
 792     CaptureVoiceOut *cap;
 793
 794     audio_detach_capture (hw);
 795     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 796         SWVoiceCap *sc;
 797         SWVoiceOut *sw;
 798         HWVoiceOut *hw_cap = &cap->hw;
 799
 800         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 801         if (!sc) {
 802             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 803                    sizeof (*sc));
 804             return -1;
 805         }
 806
 807         sc->cap = cap;
 808         sw = &sc->sw;
 809         sw->hw = hw_cap;
 810         sw->info = hw->info;
 811         sw->empty = 1;
 812         sw->active = hw->enabled;
 813         sw->conv = noop_conv;
 814         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 815         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 816         if (!sw->rate) {
 817             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 818             qemu_free (sw);
 819             return -1;
 820         }
 821         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 822         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 823 #ifdef DEBUG_CAPTURE
 824         asprintf (&sw->name, "for %p %d,%d,%d",
 825                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 826         dolog ("Added %s active = %d\n", sw->name, sw->active);
 827 #endif
 828         if (sw->active) {
 829             audio_capture_maybe_changed (cap, 1);
 830         }
 831     }
 832     return 0;
 833 }
 834
 835 /*
 836  * Hard voice (capture)
 837  */
 838 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 839 {
 840     SWVoiceIn *sw;
 841     int m = hw->total_samples_captured;
 842
 843     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 844         if (sw->active) {
 845             m = audio_MIN (m, sw->total_hw_samples_acquired);
 846         }
 847     }
 848     return m;
 849 }
 850
 851 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 852 {
 853     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 854     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 855         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 856         return 0;
 857     }
 858     return live;
 859 }
 860
 861 /*
 862  * Soft voice (capture)
 863  */
 864 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 865 {
 866     HWVoiceIn *hw = sw->hw;
 867     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 868     int rpos;
 869
 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
 875     rpos = hw->wpos - live;
 876     if (rpos >= 0) {
 877         return rpos;
 878     }
 879     else {
 880         return hw->samples + rpos;
 881     }
 882 }
 883
 884 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 885 {
 886     HWVoiceIn *hw = sw->hw;
 887     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 888     struct st_sample *src, *dst = sw->buf;
 889
 890     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 891
 892     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 893     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 894         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 895         return 0;
 896     }
 897
 898     samples = size >> sw->info.shift;
 899     if (!live) {
 900         return 0;
 901     }
 902
 903     swlim = (live * sw->ratio) >> 32;
 904     swlim = audio_MIN (swlim, samples);
 905
 906     while (swlim) {
 907         src = hw->conv_buf + rpos;
 908         isamp = hw->wpos - rpos;
 909         /* XXX: <= ? */
 910         if (isamp <= 0) {
 911             isamp = hw->samples - rpos;
 912         }
 913
 914         if (!isamp) {
 915             break;
 916         }
 917         osamp = swlim;
 918
 919         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 920             dolog ("osamp=%d\n", osamp);
 921             return 0;
 922         }
 923
 924         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 925         swlim -= osamp;
 926         rpos = (rpos + isamp) % hw->samples;
 927         dst += osamp;
 928         ret += osamp;
 929         total += isamp;
 930     }
 931
 932     sw->clip (buf, sw->buf, ret);
 933     sw->total_hw_samples_acquired += total;
 934     return ret << sw->info.shift;
 935 }
 936
 937 /*
 938  * Hard voice (playback)
 939  */
 940 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 941 {
 942     SWVoiceOut *sw;
 943     int m = INT_MAX;
 944     int nb_live = 0;
 945
 946     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 947         if (sw->active || !sw->empty) {
 948             m = audio_MIN (m, sw->total_hw_samples_mixed);
 949             nb_live += 1;
 950         }
 951     }
 952
 953     *nb_livep = nb_live;
 954     return m;
 955 }
 956
 957 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 958 {
 959     int smin;
 960
 961     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 962
 963     if (!*nb_live) {
 964         return 0;
 965     }
 966     else {
 967         int live = smin;
 968
 969         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 970             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 971             return 0;
 972         }
 973         return live;
 974     }
 975 }
 976
 977 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 978 {
 979     int nb_live;
 980     int live;
 981
 982     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 983     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 984         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 985         return 0;
 986     }
 987     return live;
 988 }
 989
 990 /*
 991  * Soft voice (playback)
 992  */
 993 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 994 {
 995     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
 996     int ret = 0, pos = 0, total = 0;
 997
 998     if (!sw) {
 999         return size;
1000     }
1001
1002     hwsamples = sw->hw->samples;
1003
1004     live = sw->total_hw_samples_mixed;
1005     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1006         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1007         return 0;
1008     }
1009
1010     if (live == hwsamples) {
1011 #ifdef DEBUG_OUT
1012         dolog ("%s is full %d\n", sw->name, live);
1013 #endif
1014         return 0;
1015     }
1016
1017     wpos = (sw->hw->rpos + live) % hwsamples;
1018     samples = size >> sw->info.shift;
1019
1020     dead = hwsamples - live;
1021     swlim = ((int64_t) dead << 32) / sw->ratio;
1022     swlim = audio_MIN (swlim, samples);
1023     if (swlim) {
1024         sw->conv (sw->buf, buf, swlim, &sw->vol);
1025     }
1026
1027     while (swlim) {
1028         dead = hwsamples - live;
1029         left = hwsamples - wpos;
1030         blck = audio_MIN (dead, left);
1031         if (!blck) {
1032             break;
1033         }
1034         isamp = swlim;
1035         osamp = blck;
1036         st_rate_flow_mix (
1037             sw->rate,
1038             sw->buf + pos,
1039             sw->hw->mix_buf + wpos,
1040             &isamp,
1041             &osamp
1042             );
1043         ret += isamp;
1044         swlim -= isamp;
1045         pos += isamp;
1046         live += osamp;
1047         wpos = (wpos + osamp) % hwsamples;
1048         total += osamp;
1049     }
1050
1051     sw->total_hw_samples_mixed += total;
1052     sw->empty = sw->total_hw_samples_mixed == 0;
1053
1054 #ifdef DEBUG_OUT
1055     dolog (
1056         "%s: write size %d ret %d total sw %d\n",
1057         SW_NAME (sw),
1058         size >> sw->info.shift,
1059         ret,
1060         sw->total_hw_samples_mixed
1061         );
1062 #endif
1063
1064     return ret << sw->info.shift;
1065 }
1066
1067 #ifdef DEBUG_AUDIO
1068 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1069 {
1070     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1071            cap, info->bits, info->sign, info->freq, info->nchannels);
1072 }
1073 #endif
1074
1075 #define DAC
1076 #include "audio_template.h"
1077 #undef DAC
1078 #include "audio_template.h"
1079
1080 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1081 {
1082     int bytes;
1083
1084     if (!sw) {
1085         /* XXX: Consider options */
1086         return size;
1087     }
1088
1089     if (!sw->hw->enabled) {
1090         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1091         return 0;
1092     }
1093
1094     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1095     return bytes;
1096 }
1097
1098 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1099 {
1100     int bytes;
1101
1102     if (!sw) {
1103         /* XXX: Consider options */
1104         return size;
1105     }
1106
1107     if (!sw->hw->enabled) {
1108         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1109         return 0;
1110     }
1111
1112     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1113     return bytes;
1114 }
1115
1116 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1117 {
1118     return sw->hw->samples << sw->hw->info.shift;
1119 }
1120
1121 void AUD_set_active_out (SWVoiceOut *sw, int on)
1122 {
1123     HWVoiceOut *hw;
1124
1125     if (!sw) {
1126         return;
1127     }
1128
1129     hw = sw->hw;
1130     if (sw->active != on) {
1131         AudioState *s = &glob_audio_state;
1132         SWVoiceOut *temp_sw;
1133         SWVoiceCap *sc;
1134
1135         if (on) {
1136             hw->pending_disable = 0;
1137             if (!hw->enabled) {
1138                 hw->enabled = 1;
1139                 if (s->vm_running) {
1140                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1141                 }
1142             }
1143         }
1144         else {
1145             if (hw->enabled) {
1146                 int nb_active = 0;
1147
1148                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1149                      temp_sw = temp_sw->entries.le_next) {
1150                     nb_active += temp_sw->active != 0;
1151                 }
1152
1153                 hw->pending_disable = nb_active == 1;
1154             }
1155         }
1156
1157         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1158             sc->sw.active = hw->enabled;
1159             if (hw->enabled) {
1160                 audio_capture_maybe_changed (sc->cap, 1);
1161             }
1162         }
1163         sw->active = on;
1164     }
1165 }
1166
1167 void AUD_set_active_in (SWVoiceIn *sw, int on)
1168 {
1169     HWVoiceIn *hw;
1170
1171     if (!sw) {
1172         return;
1173     }
1174
1175     hw = sw->hw;
1176     if (sw->active != on) {
1177         AudioState *s = &glob_audio_state;
1178         SWVoiceIn *temp_sw;
1179
1180         if (on) {
1181             if (!hw->enabled) {
1182                 hw->enabled = 1;
1183                 if (s->vm_running) {
1184                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1185                 }
1186             }
1187             sw->total_hw_samples_acquired = hw->total_samples_captured;
1188         }
1189         else {
1190             if (hw->enabled) {
1191                 int nb_active = 0;
1192
1193                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1194                      temp_sw = temp_sw->entries.le_next) {
1195                     nb_active += temp_sw->active != 0;
1196                 }
1197
1198                 if (nb_active == 1) {
1199                     hw->enabled = 0;
1200                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1201                 }
1202             }
1203         }
1204         sw->active = on;
1205     }
1206 }
1207
1208 static int audio_get_avail (SWVoiceIn *sw)
1209 {
1210     int live;
1211
1212     if (!sw) {
1213         return 0;
1214     }
1215
1216     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1217     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1218         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1219         return 0;
1220     }
1221
1222     ldebug (
1223         "%s: get_avail live %d ret %" PRId64 "\n",
1224         SW_NAME (sw),
1225         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1226         );
1227
1228     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1229 }
1230
1231 static int audio_get_free (SWVoiceOut *sw)
1232 {
1233     int live, dead;
1234
1235     if (!sw) {
1236         return 0;
1237     }
1238
1239     live = sw->total_hw_samples_mixed;
1240
1241     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1242         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1243         return 0;
1244     }
1245
1246     dead = sw->hw->samples - live;
1247
1248 #ifdef DEBUG_OUT
1249     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1250            SW_NAME (sw),
1251            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1252 #endif
1253
1254     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1255 }
1256
1257 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1258 {
1259     int n;
1260
1261     if (hw->enabled) {
1262         SWVoiceCap *sc;
1263
1264         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1265             SWVoiceOut *sw = &sc->sw;
1266             int rpos2 = rpos;
1267
1268             n = samples;
1269             while (n) {
1270                 int till_end_of_hw = hw->samples - rpos2;
1271                 int to_write = audio_MIN (till_end_of_hw, n);
1272                 int bytes = to_write << hw->info.shift;
1273                 int written;
1274
1275                 sw->buf = hw->mix_buf + rpos2;
1276                 written = audio_pcm_sw_write (sw, NULL, bytes);
1277                 if (written - bytes) {
1278                     dolog ("Could not mix %d bytes into a capture "
1279                            "buffer, mixed %d\n",
1280                            bytes, written);
1281                     break;
1282                 }
1283                 n -= to_write;
1284                 rpos2 = (rpos2 + to_write) % hw->samples;
1285             }
1286         }
1287     }
1288
1289     n = audio_MIN (samples, hw->samples - rpos);
1290     mixeng_clear (hw->mix_buf + rpos, n);
1291     mixeng_clear (hw->mix_buf, samples - n);
1292 }
1293
1294 static void audio_run_out (AudioState *s)
1295 {
1296     HWVoiceOut *hw = NULL;
1297     SWVoiceOut *sw;
1298
1299     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1300         int played;
1301         int live, free, nb_live, cleanup_required, prev_rpos;
1302
1303         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1304         if (!nb_live) {
1305             live = 0;
1306         }
1307
1308         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1309             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1310             continue;
1311         }
1312
1313         if (hw->pending_disable && !nb_live) {
1314             SWVoiceCap *sc;
1315 #ifdef DEBUG_OUT
1316             dolog ("Disabling voice\n");
1317 #endif
1318             hw->enabled = 0;
1319             hw->pending_disable = 0;
1320             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1321             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1322                 sc->sw.active = 0;
1323                 audio_recalc_and_notify_capture (sc->cap);
1324             }
1325             continue;
1326         }
1327
1328         if (!live) {
1329             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1330                 if (sw->active) {
1331                     free = audio_get_free (sw);
1332                     if (free > 0) {
1333                         sw->callback.fn (sw->callback.opaque, free);
1334                     }
1335                 }
1336             }
1337             continue;
1338         }
1339
1340         prev_rpos = hw->rpos;
1341         played = hw->pcm_ops->run_out (hw);
1342         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1343             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1344                    hw->rpos, hw->samples, played);
1345             hw->rpos = 0;
1346         }
1347
1348 #ifdef DEBUG_OUT
1349         dolog ("played=%d\n", played);
1350 #endif
1351
1352         if (played) {
1353             hw->ts_helper += played;
1354             audio_capture_mix_and_clear (hw, prev_rpos, played);
1355         }
1356
1357         cleanup_required = 0;
1358         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1359             if (!sw->active && sw->empty) {
1360                 continue;
1361             }
1362
1363             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1364                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1365                        played, sw->total_hw_samples_mixed);
1366                 played = sw->total_hw_samples_mixed;
1367             }
1368
1369             sw->total_hw_samples_mixed -= played;
1370
1371             if (!sw->total_hw_samples_mixed) {
1372                 sw->empty = 1;
1373                 cleanup_required |= !sw->active && !sw->callback.fn;
1374             }
1375
1376             if (sw->active) {
1377                 free = audio_get_free (sw);
1378                 if (free > 0) {
1379                     sw->callback.fn (sw->callback.opaque, free);
1380                 }
1381             }
1382         }
1383
1384         if (cleanup_required) {
1385             SWVoiceOut *sw1;
1386
1387             sw = hw->sw_head.lh_first;
1388             while (sw) {
1389                 sw1 = sw->entries.le_next;
1390                 if (!sw->active && !sw->callback.fn) {
1391 #ifdef DEBUG_PLIVE
1392                     dolog ("Finishing with old voice\n");
1393 #endif
1394                     audio_close_out (sw);
1395                 }
1396                 sw = sw1;
1397             }
1398         }
1399     }
1400 }
1401
1402 static void audio_run_in (AudioState *s)
1403 {
1404     HWVoiceIn *hw = NULL;
1405
1406     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1407         SWVoiceIn *sw;
1408         int captured, min;
1409
1410         captured = hw->pcm_ops->run_in (hw);
1411
1412         min = audio_pcm_hw_find_min_in (hw);
1413         hw->total_samples_captured += captured - min;
1414         hw->ts_helper += captured;
1415
1416         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1417             sw->total_hw_samples_acquired -= min;
1418
1419             if (sw->active) {
1420                 int avail;
1421
1422                 avail = audio_get_avail (sw);
1423                 if (avail > 0) {
1424                     sw->callback.fn (sw->callback.opaque, avail);
1425                 }
1426             }
1427         }
1428     }
1429 }
1430
1431 static void audio_run_capture (AudioState *s)
1432 {
1433     CaptureVoiceOut *cap;
1434
1435     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1436         int live, rpos, captured;
1437         HWVoiceOut *hw = &cap->hw;
1438         SWVoiceOut *sw;
1439
1440         captured = live = audio_pcm_hw_get_live_out (hw);
1441         rpos = hw->rpos;
1442         while (live) {
1443             int left = hw->samples - rpos;
1444             int to_capture = audio_MIN (live, left);
1445             struct st_sample *src;
1446             struct capture_callback *cb;
1447
1448             src = hw->mix_buf + rpos;
1449             hw->clip (cap->buf, src, to_capture);
1450             mixeng_clear (src, to_capture);
1451
1452             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1453                 cb->ops.capture (cb->opaque, cap->buf,
1454                                  to_capture << hw->info.shift);
1455             }
1456             rpos = (rpos + to_capture) % hw->samples;
1457             live -= to_capture;
1458         }
1459         hw->rpos = rpos;
1460
1461         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1462             if (!sw->active && sw->empty) {
1463                 continue;
1464             }
1465
1466             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1467                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1468                        captured, sw->total_hw_samples_mixed);
1469                 captured = sw->total_hw_samples_mixed;
1470             }
1471
1472             sw->total_hw_samples_mixed -= captured;
1473             sw->empty = sw->total_hw_samples_mixed == 0;
1474         }
1475     }
1476 }
1477
1478 static void audio_timer (void *opaque)
1479 {
1480     AudioState *s = opaque;
1481
1482     audio_run_out (s);
1483     audio_run_in (s);
1484     audio_run_capture (s);
1485
1486     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1487 }
1488
1489 static struct audio_option audio_options[] = {
1490     /* DAC */
1491     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1492      "Use fixed settings for host DAC", NULL, 0},
1493
1494     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1495      "Frequency for fixed host DAC", NULL, 0},
1496
1497     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1498      "Format for fixed host DAC", NULL, 0},
1499
1500     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1501      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1502
1503     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1504      "Number of voices for DAC", NULL, 0},
1505
1506     /* ADC */
1507     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1508      "Use fixed settings for host ADC", NULL, 0},
1509
1510     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1511      "Frequency for fixed host ADC", NULL, 0},
1512
1513     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1514      "Format for fixed host ADC", NULL, 0},
1515
1516     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1517      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1518
1519     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1520      "Number of voices for ADC", NULL, 0},
1521
1522     /* Misc */
1523     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hertz,
1524      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1525
1526     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1527      "(undocumented)", NULL, 0},
1528
1529     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1530      "print logging messages to monitor instead of stderr", NULL, 0},
1531
1532     {NULL, 0, NULL, NULL, NULL, 0}
1533 };
1534
1535 static void audio_pp_nb_voices (const char *typ, int nb)
1536 {
1537     switch (nb) {
1538     case 0:
1539         printf ("Does not support %s\n", typ);
1540         break;
1541     case 1:
1542         printf ("One %s voice\n", typ);
1543         break;
1544     case INT_MAX:
1545         printf ("Theoretically supports many %s voices\n", typ);
1546         break;
1547     default:
1548         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1549         break;
1550     }
1551
1552 }
1553
1554 void AUD_help (void)
1555 {
1556     size_t i;
1557
1558     audio_process_options ("AUDIO", audio_options);
1559     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1560         struct audio_driver *d = drvtab[i];
1561         if (d->options) {
1562             audio_process_options (d->name, d->options);
1563         }
1564     }
1565
1566     printf ("Audio options:\n");
1567     audio_print_options ("AUDIO", audio_options);
1568     printf ("\n");
1569
1570     printf ("Available drivers:\n");
1571
1572     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1573         struct audio_driver *d = drvtab[i];
1574
1575         printf ("Name: %s\n", d->name);
1576         printf ("Description: %s\n", d->descr);
1577
1578         audio_pp_nb_voices ("playback", d->max_voices_out);
1579         audio_pp_nb_voices ("capture", d->max_voices_in);
1580
1581         if (d->options) {
1582             printf ("Options:\n");
1583             audio_print_options (d->name, d->options);
1584         }
1585         else {
1586             printf ("No options\n");
1587         }
1588         printf ("\n");
1589     }
1590
1591     printf (
1592         "Options are settable through environment variables.\n"
1593         "Example:\n"
1594 #ifdef _WIN32
1595         "  set QEMU_AUDIO_DRV=wav\n"
1596         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1597 #else
1598         "  export QEMU_AUDIO_DRV=wav\n"
1599         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1600         "(for csh replace export with setenv in the above)\n"
1601 #endif
1602         "  qemu ...\n\n"
1603         );
1604 }
1605
1606 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1607 {
1608     if (drv->options) {
1609         audio_process_options (drv->name, drv->options);
1610     }
1611     s->drv_opaque = drv->init ();
1612
1613     if (s->drv_opaque) {
1614         audio_init_nb_voices_out (drv);
1615         audio_init_nb_voices_in (drv);
1616         s->drv = drv;
1617         return 0;
1618     }
1619     else {
1620         dolog ("Could not init `%s' audio driver\n", drv->name);
1621         return -1;
1622     }
1623 }
1624
1625 static void audio_vm_change_state_handler (void *opaque, int running,
1626                                            int reason)
1627 {
1628     AudioState *s = opaque;
1629     HWVoiceOut *hwo = NULL;
1630     HWVoiceIn *hwi = NULL;
1631     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1632
1633     s->vm_running = running;
1634     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1635         hwo->pcm_ops->ctl_out (hwo, op);
1636     }
1637
1638     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1639         hwi->pcm_ops->ctl_in (hwi, op);
1640     }
1641 }
1642
1643 static void audio_atexit (void)
1644 {
1645     AudioState *s = &glob_audio_state;
1646     HWVoiceOut *hwo = NULL;
1647     HWVoiceIn *hwi = NULL;
1648
1649     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1650         SWVoiceCap *sc;
1651
1652         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1653         hwo->pcm_ops->fini_out (hwo);
1654
1655         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1656             CaptureVoiceOut *cap = sc->cap;
1657             struct capture_callback *cb;
1658
1659             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1660                 cb->ops.destroy (cb->opaque);
1661             }
1662         }
1663     }
1664
1665     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1666         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1667         hwi->pcm_ops->fini_in (hwi);
1668     }
1669
1670     if (s->drv) {
1671         s->drv->fini (s->drv_opaque);
1672     }
1673 }
1674
1675 static void audio_save (QEMUFile *f, void *opaque)
1676 {
1677     (void) f;
1678     (void) opaque;
1679 }
1680
1681 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1682 {
1683     (void) f;
1684     (void) opaque;
1685
1686     if (version_id != 1) {
1687         return -EINVAL;
1688     }
1689
1690     return 0;
1691 }
1692
1693 static void audio_init (void)
1694 {
1695     size_t i;
1696     int done = 0;
1697     const char *drvname;
1698     AudioState *s = &glob_audio_state;
1699
1700     if (s->drv) {
1701         return;
1702     }
1703
1704     LIST_INIT (&s->hw_head_out);
1705     LIST_INIT (&s->hw_head_in);
1706     LIST_INIT (&s->cap_head);
1707     atexit (audio_atexit);
1708
1709     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1710     if (!s->ts) {
1711         hw_error("Could not create audio timer\n");
1712     }
1713
1714     audio_process_options ("AUDIO", audio_options);
1715
1716     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1717     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1718
1719     if (s->nb_hw_voices_out <= 0) {
1720         dolog ("Bogus number of playback voices %d, setting to 1\n",
1721                s->nb_hw_voices_out);
1722         s->nb_hw_voices_out = 1;
1723     }
1724
1725     if (s->nb_hw_voices_in <= 0) {
1726         dolog ("Bogus number of capture voices %d, setting to 0\n",
1727                s->nb_hw_voices_in);
1728         s->nb_hw_voices_in = 0;
1729     }
1730
1731     {
1732         int def;
1733         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1734     }
1735
1736     if (drvname) {
1737         int found = 0;
1738
1739         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1740             if (!strcmp (drvname, drvtab[i]->name)) {
1741                 done = !audio_driver_init (s, drvtab[i]);
1742                 found = 1;
1743                 break;
1744             }
1745         }
1746
1747         if (!found) {
1748             dolog ("Unknown audio driver `%s'\n", drvname);
1749             dolog ("Run with -audio-help to list available drivers\n");
1750         }
1751     }
1752
1753     if (!done) {
1754         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1755             if (drvtab[i]->can_be_default) {
1756                 done = !audio_driver_init (s, drvtab[i]);
1757             }
1758         }
1759     }
1760
1761     if (!done) {
1762         done = !audio_driver_init (s, &no_audio_driver);
1763         if (!done) {
1764             hw_error("Could not initialize audio subsystem\n");
1765         }
1766         else {
1767             dolog ("warning: Using timer based audio emulation\n");
1768         }
1769     }
1770
1771     VMChangeStateEntry *e;
1772
1773     if (conf.period.hertz <= 0) {
1774         if (conf.period.hertz < 0) {
1775             dolog ("warning: Timer period is negative - %d "
1776                    "treating as zero\n",
1777                    conf.period.hertz);
1778         }
1779         conf.period.ticks = 1;
1780     } else {
1781         conf.period.ticks = ticks_per_sec / conf.period.hertz;
1782     }
1783
1784     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1785     if (!e) {
1786         dolog ("warning: Could not register change state handler\n"
1787                "(Audio can continue looping even after stopping the VM)\n");
1788     }
1789
1790     LIST_INIT (&s->card_head);
1791     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1792     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1793 }
1794
1795 void AUD_register_card (const char *name, QEMUSoundCard *card)
1796 {
1797     audio_init ();
1798     card->name = qemu_strdup (name);
1799     memset (&card->entries, 0, sizeof (card->entries));
1800     LIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1801 }
1802
1803 void AUD_remove_card (QEMUSoundCard *card)
1804 {
1805     LIST_REMOVE (card, entries);
1806     qemu_free (card->name);
1807 }
1808
1809
1810 CaptureVoiceOut *AUD_add_capture (
1811     struct audsettings *as,
1812     struct audio_capture_ops *ops,
1813     void *cb_opaque
1814     )
1815 {
1816     AudioState *s = &glob_audio_state;
1817     CaptureVoiceOut *cap;
1818     struct capture_callback *cb;
1819
1820     if (audio_validate_settings (as)) {
1821         dolog ("Invalid settings were passed when trying to add capture\n");
1822         audio_print_settings (as);
1823         goto err0;
1824     }
1825
1826     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1827     if (!cb) {
1828         dolog ("Could not allocate capture callback information, size %zu\n",
1829                sizeof (*cb));
1830         goto err0;
1831     }
1832     cb->ops = *ops;
1833     cb->opaque = cb_opaque;
1834
1835     cap = audio_pcm_capture_find_specific (as);
1836     if (cap) {
1837         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1838         return cap;
1839     }
1840     else {
1841         HWVoiceOut *hw;
1842         CaptureVoiceOut *cap;
1843
1844         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1845         if (!cap) {
1846             dolog ("Could not allocate capture voice, size %zu\n",
1847                    sizeof (*cap));
1848             goto err1;
1849         }
1850
1851         hw = &cap->hw;
1852         LIST_INIT (&hw->sw_head);
1853         LIST_INIT (&cap->cb_head);
1854
1855         /* XXX find a more elegant way */
1856         hw->samples = 4096 * 4;
1857         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1858                                     sizeof (struct st_sample));
1859         if (!hw->mix_buf) {
1860             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1861                    hw->samples);
1862             goto err2;
1863         }
1864
1865         audio_pcm_init_info (&hw->info, as);
1866
1867         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1868         if (!cap->buf) {
1869             dolog ("Could not allocate capture buffer "
1870                    "(%d samples, each %d bytes)\n",
1871                    hw->samples, 1 << hw->info.shift);
1872             goto err3;
1873         }
1874
1875         hw->clip = mixeng_clip
1876             [hw->info.nchannels == 2]
1877             [hw->info.sign]
1878             [hw->info.swap_endianness]
1879             [audio_bits_to_index (hw->info.bits)];
1880
1881         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1882         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1883
1884         hw = NULL;
1885         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1886             audio_attach_capture (hw);
1887         }
1888         return cap;
1889
1890     err3:
1891         qemu_free (cap->hw.mix_buf);
1892     err2:
1893         qemu_free (cap);
1894     err1:
1895         qemu_free (cb);
1896     err0:
1897         return NULL;
1898     }
1899 }
1900
1901 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1902 {
1903     struct capture_callback *cb;
1904
1905     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1906         if (cb->opaque == cb_opaque) {
1907             cb->ops.destroy (cb_opaque);
1908             LIST_REMOVE (cb, entries);
1909             qemu_free (cb);
1910
1911             if (!cap->cb_head.lh_first) {
1912                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1913
1914                 while (sw) {
1915                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1916 #ifdef DEBUG_CAPTURE
1917                     dolog ("freeing %s\n", sw->name);
1918 #endif
1919
1920                     sw1 = sw->entries.le_next;
1921                     if (sw->rate) {
1922                         st_rate_stop (sw->rate);
1923                         sw->rate = NULL;
1924                     }
1925                     LIST_REMOVE (sw, entries);
1926                     LIST_REMOVE (sc, entries);
1927                     qemu_free (sc);
1928                     sw = sw1;
1929                 }
1930                 LIST_REMOVE (cap, entries);
1931                 qemu_free (cap);
1932             }
1933             return;
1934         }
1935     }
1936 }
1937
1938 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1939 {
1940     if (sw) {
1941         sw->vol.mute = mute;
1942         sw->vol.l = nominal_volume.l * lvol / 255;
1943         sw->vol.r = nominal_volume.r * rvol / 255;
1944     }
1945 }
1946
1947 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1948 {
1949     if (sw) {
1950         sw->vol.mute = mute;
1951         sw->vol.l = nominal_volume.l * lvol / 255;
1952         sw->vol.r = nominal_volume.r * rvol / 255;
1953     }
1954 }