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     AudioState *s,
 711     struct audsettings *as
 712     )
 713 {
 714     CaptureVoiceOut *cap;
 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 (AudioState *s, HWVoiceOut *hw)
 790 {
 791     CaptureVoiceOut *cap;
 792
 793     audio_detach_capture (hw);
 794     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 795         SWVoiceCap *sc;
 796         SWVoiceOut *sw;
 797         HWVoiceOut *hw_cap = &cap->hw;
 798
 799         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 800         if (!sc) {
 801             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 802                    sizeof (*sc));
 803             return -1;
 804         }
 805
 806         sc->cap = cap;
 807         sw = &sc->sw;
 808         sw->hw = hw_cap;
 809         sw->info = hw->info;
 810         sw->empty = 1;
 811         sw->active = hw->enabled;
 812         sw->conv = noop_conv;
 813         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 814         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 815         if (!sw->rate) {
 816             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 817             qemu_free (sw);
 818             return -1;
 819         }
 820         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 821         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 822 #ifdef DEBUG_CAPTURE
 823         asprintf (&sw->name, "for %p %d,%d,%d",
 824                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 825         dolog ("Added %s active = %d\n", sw->name, sw->active);
 826 #endif
 827         if (sw->active) {
 828             audio_capture_maybe_changed (cap, 1);
 829         }
 830     }
 831     return 0;
 832 }
 833
 834 /*
 835  * Hard voice (capture)
 836  */
 837 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 838 {
 839     SWVoiceIn *sw;
 840     int m = hw->total_samples_captured;
 841
 842     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 843         if (sw->active) {
 844             m = audio_MIN (m, sw->total_hw_samples_acquired);
 845         }
 846     }
 847     return m;
 848 }
 849
 850 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 851 {
 852     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 853     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 854         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 855         return 0;
 856     }
 857     return live;
 858 }
 859
 860 /*
 861  * Soft voice (capture)
 862  */
 863 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 864 {
 865     HWVoiceIn *hw = sw->hw;
 866     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 867     int rpos;
 868
 869     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 870         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 871         return 0;
 872     }
 873
 874     rpos = hw->wpos - live;
 875     if (rpos >= 0) {
 876         return rpos;
 877     }
 878     else {
 879         return hw->samples + rpos;
 880     }
 881 }
 882
 883 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 884 {
 885     HWVoiceIn *hw = sw->hw;
 886     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 887     struct st_sample *src, *dst = sw->buf;
 888
 889     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 890
 891     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 892     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 893         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 894         return 0;
 895     }
 896
 897     samples = size >> sw->info.shift;
 898     if (!live) {
 899         return 0;
 900     }
 901
 902     swlim = (live * sw->ratio) >> 32;
 903     swlim = audio_MIN (swlim, samples);
 904
 905     while (swlim) {
 906         src = hw->conv_buf + rpos;
 907         isamp = hw->wpos - rpos;
 908         /* XXX: <= ? */
 909         if (isamp <= 0) {
 910             isamp = hw->samples - rpos;
 911         }
 912
 913         if (!isamp) {
 914             break;
 915         }
 916         osamp = swlim;
 917
 918         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 919             dolog ("osamp=%d\n", osamp);
 920             return 0;
 921         }
 922
 923         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 924         swlim -= osamp;
 925         rpos = (rpos + isamp) % hw->samples;
 926         dst += osamp;
 927         ret += osamp;
 928         total += isamp;
 929     }
 930
 931     sw->clip (buf, sw->buf, ret);
 932     sw->total_hw_samples_acquired += total;
 933     return ret << sw->info.shift;
 934 }
 935
 936 /*
 937  * Hard voice (playback)
 938  */
 939 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 940 {
 941     SWVoiceOut *sw;
 942     int m = INT_MAX;
 943     int nb_live = 0;
 944
 945     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 946         if (sw->active || !sw->empty) {
 947             m = audio_MIN (m, sw->total_hw_samples_mixed);
 948             nb_live += 1;
 949         }
 950     }
 951
 952     *nb_livep = nb_live;
 953     return m;
 954 }
 955
 956 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 957 {
 958     int smin;
 959
 960     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 961
 962     if (!*nb_live) {
 963         return 0;
 964     }
 965     else {
 966         int live = smin;
 967
 968         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 969             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 970             return 0;
 971         }
 972         return live;
 973     }
 974 }
 975
 976 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 977 {
 978     int nb_live;
 979     int live;
 980
 981     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 982     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 983         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 984         return 0;
 985     }
 986     return live;
 987 }
 988
 989 /*
 990  * Soft voice (playback)
 991  */
 992 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 993 {
 994     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
 995     int ret = 0, pos = 0, total = 0;
 996
 997     if (!sw) {
 998         return size;
 999     }
1000
1001     hwsamples = sw->hw->samples;
1002
1003     live = sw->total_hw_samples_mixed;
1004     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1005         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1006         return 0;
1007     }
1008
1009     if (live == hwsamples) {
1010 #ifdef DEBUG_OUT
1011         dolog ("%s is full %d\n", sw->name, live);
1012 #endif
1013         return 0;
1014     }
1015
1016     wpos = (sw->hw->rpos + live) % hwsamples;
1017     samples = size >> sw->info.shift;
1018
1019     dead = hwsamples - live;
1020     swlim = ((int64_t) dead << 32) / sw->ratio;
1021     swlim = audio_MIN (swlim, samples);
1022     if (swlim) {
1023         sw->conv (sw->buf, buf, swlim, &sw->vol);
1024     }
1025
1026     while (swlim) {
1027         dead = hwsamples - live;
1028         left = hwsamples - wpos;
1029         blck = audio_MIN (dead, left);
1030         if (!blck) {
1031             break;
1032         }
1033         isamp = swlim;
1034         osamp = blck;
1035         st_rate_flow_mix (
1036             sw->rate,
1037             sw->buf + pos,
1038             sw->hw->mix_buf + wpos,
1039             &isamp,
1040             &osamp
1041             );
1042         ret += isamp;
1043         swlim -= isamp;
1044         pos += isamp;
1045         live += osamp;
1046         wpos = (wpos + osamp) % hwsamples;
1047         total += osamp;
1048     }
1049
1050     sw->total_hw_samples_mixed += total;
1051     sw->empty = sw->total_hw_samples_mixed == 0;
1052
1053 #ifdef DEBUG_OUT
1054     dolog (
1055         "%s: write size %d ret %d total sw %d\n",
1056         SW_NAME (sw),
1057         size >> sw->info.shift,
1058         ret,
1059         sw->total_hw_samples_mixed
1060         );
1061 #endif
1062
1063     return ret << sw->info.shift;
1064 }
1065
1066 #ifdef DEBUG_AUDIO
1067 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1068 {
1069     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1070            cap, info->bits, info->sign, info->freq, info->nchannels);
1071 }
1072 #endif
1073
1074 #define DAC
1075 #include "audio_template.h"
1076 #undef DAC
1077 #include "audio_template.h"
1078
1079 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1080 {
1081     int bytes;
1082
1083     if (!sw) {
1084         /* XXX: Consider options */
1085         return size;
1086     }
1087
1088     if (!sw->hw->enabled) {
1089         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1090         return 0;
1091     }
1092
1093     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1094     return bytes;
1095 }
1096
1097 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1098 {
1099     int bytes;
1100
1101     if (!sw) {
1102         /* XXX: Consider options */
1103         return size;
1104     }
1105
1106     if (!sw->hw->enabled) {
1107         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1108         return 0;
1109     }
1110
1111     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1112     return bytes;
1113 }
1114
1115 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1116 {
1117     return sw->hw->samples << sw->hw->info.shift;
1118 }
1119
1120 void AUD_set_active_out (SWVoiceOut *sw, int on)
1121 {
1122     HWVoiceOut *hw;
1123
1124     if (!sw) {
1125         return;
1126     }
1127
1128     hw = sw->hw;
1129     if (sw->active != on) {
1130         AudioState *s = &glob_audio_state;
1131         SWVoiceOut *temp_sw;
1132         SWVoiceCap *sc;
1133
1134         if (on) {
1135             hw->pending_disable = 0;
1136             if (!hw->enabled) {
1137                 hw->enabled = 1;
1138                 if (s->vm_running) {
1139                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1140                 }
1141             }
1142         }
1143         else {
1144             if (hw->enabled) {
1145                 int nb_active = 0;
1146
1147                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1148                      temp_sw = temp_sw->entries.le_next) {
1149                     nb_active += temp_sw->active != 0;
1150                 }
1151
1152                 hw->pending_disable = nb_active == 1;
1153             }
1154         }
1155
1156         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1157             sc->sw.active = hw->enabled;
1158             if (hw->enabled) {
1159                 audio_capture_maybe_changed (sc->cap, 1);
1160             }
1161         }
1162         sw->active = on;
1163     }
1164 }
1165
1166 void AUD_set_active_in (SWVoiceIn *sw, int on)
1167 {
1168     HWVoiceIn *hw;
1169
1170     if (!sw) {
1171         return;
1172     }
1173
1174     hw = sw->hw;
1175     if (sw->active != on) {
1176         AudioState *s = &glob_audio_state;
1177         SWVoiceIn *temp_sw;
1178
1179         if (on) {
1180             if (!hw->enabled) {
1181                 hw->enabled = 1;
1182                 if (s->vm_running) {
1183                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1184                 }
1185             }
1186             sw->total_hw_samples_acquired = hw->total_samples_captured;
1187         }
1188         else {
1189             if (hw->enabled) {
1190                 int nb_active = 0;
1191
1192                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1193                      temp_sw = temp_sw->entries.le_next) {
1194                     nb_active += temp_sw->active != 0;
1195                 }
1196
1197                 if (nb_active == 1) {
1198                     hw->enabled = 0;
1199                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1200                 }
1201             }
1202         }
1203         sw->active = on;
1204     }
1205 }
1206
1207 static int audio_get_avail (SWVoiceIn *sw)
1208 {
1209     int live;
1210
1211     if (!sw) {
1212         return 0;
1213     }
1214
1215     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1216     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1217         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1218         return 0;
1219     }
1220
1221     ldebug (
1222         "%s: get_avail live %d ret %" PRId64 "\n",
1223         SW_NAME (sw),
1224         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1225         );
1226
1227     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1228 }
1229
1230 static int audio_get_free (SWVoiceOut *sw)
1231 {
1232     int live, dead;
1233
1234     if (!sw) {
1235         return 0;
1236     }
1237
1238     live = sw->total_hw_samples_mixed;
1239
1240     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1241         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1242         return 0;
1243     }
1244
1245     dead = sw->hw->samples - live;
1246
1247 #ifdef DEBUG_OUT
1248     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1249            SW_NAME (sw),
1250            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1251 #endif
1252
1253     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1254 }
1255
1256 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1257 {
1258     int n;
1259
1260     if (hw->enabled) {
1261         SWVoiceCap *sc;
1262
1263         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1264             SWVoiceOut *sw = &sc->sw;
1265             int rpos2 = rpos;
1266
1267             n = samples;
1268             while (n) {
1269                 int till_end_of_hw = hw->samples - rpos2;
1270                 int to_write = audio_MIN (till_end_of_hw, n);
1271                 int bytes = to_write << hw->info.shift;
1272                 int written;
1273
1274                 sw->buf = hw->mix_buf + rpos2;
1275                 written = audio_pcm_sw_write (sw, NULL, bytes);
1276                 if (written - bytes) {
1277                     dolog ("Could not mix %d bytes into a capture "
1278                            "buffer, mixed %d\n",
1279                            bytes, written);
1280                     break;
1281                 }
1282                 n -= to_write;
1283                 rpos2 = (rpos2 + to_write) % hw->samples;
1284             }
1285         }
1286     }
1287
1288     n = audio_MIN (samples, hw->samples - rpos);
1289     mixeng_clear (hw->mix_buf + rpos, n);
1290     mixeng_clear (hw->mix_buf, samples - n);
1291 }
1292
1293 static void audio_run_out (AudioState *s)
1294 {
1295     HWVoiceOut *hw = NULL;
1296     SWVoiceOut *sw;
1297
1298     while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1299         int played;
1300         int live, free, nb_live, cleanup_required, prev_rpos;
1301
1302         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1303         if (!nb_live) {
1304             live = 0;
1305         }
1306
1307         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1308             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1309             continue;
1310         }
1311
1312         if (hw->pending_disable && !nb_live) {
1313             SWVoiceCap *sc;
1314 #ifdef DEBUG_OUT
1315             dolog ("Disabling voice\n");
1316 #endif
1317             hw->enabled = 0;
1318             hw->pending_disable = 0;
1319             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1320             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1321                 sc->sw.active = 0;
1322                 audio_recalc_and_notify_capture (sc->cap);
1323             }
1324             continue;
1325         }
1326
1327         if (!live) {
1328             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1329                 if (sw->active) {
1330                     free = audio_get_free (sw);
1331                     if (free > 0) {
1332                         sw->callback.fn (sw->callback.opaque, free);
1333                     }
1334                 }
1335             }
1336             continue;
1337         }
1338
1339         prev_rpos = hw->rpos;
1340         played = hw->pcm_ops->run_out (hw);
1341         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1342             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1343                    hw->rpos, hw->samples, played);
1344             hw->rpos = 0;
1345         }
1346
1347 #ifdef DEBUG_OUT
1348         dolog ("played=%d\n", played);
1349 #endif
1350
1351         if (played) {
1352             hw->ts_helper += played;
1353             audio_capture_mix_and_clear (hw, prev_rpos, played);
1354         }
1355
1356         cleanup_required = 0;
1357         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1358             if (!sw->active && sw->empty) {
1359                 continue;
1360             }
1361
1362             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1363                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1364                        played, sw->total_hw_samples_mixed);
1365                 played = sw->total_hw_samples_mixed;
1366             }
1367
1368             sw->total_hw_samples_mixed -= played;
1369
1370             if (!sw->total_hw_samples_mixed) {
1371                 sw->empty = 1;
1372                 cleanup_required |= !sw->active && !sw->callback.fn;
1373             }
1374
1375             if (sw->active) {
1376                 free = audio_get_free (sw);
1377                 if (free > 0) {
1378                     sw->callback.fn (sw->callback.opaque, free);
1379                 }
1380             }
1381         }
1382
1383         if (cleanup_required) {
1384             SWVoiceOut *sw1;
1385
1386             sw = hw->sw_head.lh_first;
1387             while (sw) {
1388                 sw1 = sw->entries.le_next;
1389                 if (!sw->active && !sw->callback.fn) {
1390 #ifdef DEBUG_PLIVE
1391                     dolog ("Finishing with old voice\n");
1392 #endif
1393                     audio_close_out (s, sw);
1394                 }
1395                 sw = sw1;
1396             }
1397         }
1398     }
1399 }
1400
1401 static void audio_run_in (AudioState *s)
1402 {
1403     HWVoiceIn *hw = NULL;
1404
1405     while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1406         SWVoiceIn *sw;
1407         int captured, min;
1408
1409         captured = hw->pcm_ops->run_in (hw);
1410
1411         min = audio_pcm_hw_find_min_in (hw);
1412         hw->total_samples_captured += captured - min;
1413         hw->ts_helper += captured;
1414
1415         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1416             sw->total_hw_samples_acquired -= min;
1417
1418             if (sw->active) {
1419                 int avail;
1420
1421                 avail = audio_get_avail (sw);
1422                 if (avail > 0) {
1423                     sw->callback.fn (sw->callback.opaque, avail);
1424                 }
1425             }
1426         }
1427     }
1428 }
1429
1430 static void audio_run_capture (AudioState *s)
1431 {
1432     CaptureVoiceOut *cap;
1433
1434     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1435         int live, rpos, captured;
1436         HWVoiceOut *hw = &cap->hw;
1437         SWVoiceOut *sw;
1438
1439         captured = live = audio_pcm_hw_get_live_out (hw);
1440         rpos = hw->rpos;
1441         while (live) {
1442             int left = hw->samples - rpos;
1443             int to_capture = audio_MIN (live, left);
1444             struct st_sample *src;
1445             struct capture_callback *cb;
1446
1447             src = hw->mix_buf + rpos;
1448             hw->clip (cap->buf, src, to_capture);
1449             mixeng_clear (src, to_capture);
1450
1451             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1452                 cb->ops.capture (cb->opaque, cap->buf,
1453                                  to_capture << hw->info.shift);
1454             }
1455             rpos = (rpos + to_capture) % hw->samples;
1456             live -= to_capture;
1457         }
1458         hw->rpos = rpos;
1459
1460         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1461             if (!sw->active && sw->empty) {
1462                 continue;
1463             }
1464
1465             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1466                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1467                        captured, sw->total_hw_samples_mixed);
1468                 captured = sw->total_hw_samples_mixed;
1469             }
1470
1471             sw->total_hw_samples_mixed -= captured;
1472             sw->empty = sw->total_hw_samples_mixed == 0;
1473         }
1474     }
1475 }
1476
1477 static void audio_timer (void *opaque)
1478 {
1479     AudioState *s = opaque;
1480
1481     audio_run_out (s);
1482     audio_run_in (s);
1483     audio_run_capture (s);
1484
1485     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1486 }
1487
1488 static struct audio_option audio_options[] = {
1489     /* DAC */
1490     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1491      "Use fixed settings for host DAC", NULL, 0},
1492
1493     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1494      "Frequency for fixed host DAC", NULL, 0},
1495
1496     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1497      "Format for fixed host DAC", NULL, 0},
1498
1499     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1500      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1501
1502     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1503      "Number of voices for DAC", NULL, 0},
1504
1505     /* ADC */
1506     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1507      "Use fixed settings for host ADC", NULL, 0},
1508
1509     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1510      "Frequency for fixed host ADC", NULL, 0},
1511
1512     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1513      "Format for fixed host ADC", NULL, 0},
1514
1515     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1516      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1517
1518     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1519      "Number of voices for ADC", NULL, 0},
1520
1521     /* Misc */
1522     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hertz,
1523      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1524
1525     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1526      "(undocumented)", NULL, 0},
1527
1528     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1529      "print logging messages to monitor instead of stderr", NULL, 0},
1530
1531     {NULL, 0, NULL, NULL, NULL, 0}
1532 };
1533
1534 static void audio_pp_nb_voices (const char *typ, int nb)
1535 {
1536     switch (nb) {
1537     case 0:
1538         printf ("Does not support %s\n", typ);
1539         break;
1540     case 1:
1541         printf ("One %s voice\n", typ);
1542         break;
1543     case INT_MAX:
1544         printf ("Theoretically supports many %s voices\n", typ);
1545         break;
1546     default:
1547         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1548         break;
1549     }
1550
1551 }
1552
1553 void AUD_help (void)
1554 {
1555     size_t i;
1556
1557     audio_process_options ("AUDIO", audio_options);
1558     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1559         struct audio_driver *d = drvtab[i];
1560         if (d->options) {
1561             audio_process_options (d->name, d->options);
1562         }
1563     }
1564
1565     printf ("Audio options:\n");
1566     audio_print_options ("AUDIO", audio_options);
1567     printf ("\n");
1568
1569     printf ("Available drivers:\n");
1570
1571     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1572         struct audio_driver *d = drvtab[i];
1573
1574         printf ("Name: %s\n", d->name);
1575         printf ("Description: %s\n", d->descr);
1576
1577         audio_pp_nb_voices ("playback", d->max_voices_out);
1578         audio_pp_nb_voices ("capture", d->max_voices_in);
1579
1580         if (d->options) {
1581             printf ("Options:\n");
1582             audio_print_options (d->name, d->options);
1583         }
1584         else {
1585             printf ("No options\n");
1586         }
1587         printf ("\n");
1588     }
1589
1590     printf (
1591         "Options are settable through environment variables.\n"
1592         "Example:\n"
1593 #ifdef _WIN32
1594         "  set QEMU_AUDIO_DRV=wav\n"
1595         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1596 #else
1597         "  export QEMU_AUDIO_DRV=wav\n"
1598         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1599         "(for csh replace export with setenv in the above)\n"
1600 #endif
1601         "  qemu ...\n\n"
1602         );
1603 }
1604
1605 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1606 {
1607     if (drv->options) {
1608         audio_process_options (drv->name, drv->options);
1609     }
1610     s->drv_opaque = drv->init ();
1611
1612     if (s->drv_opaque) {
1613         audio_init_nb_voices_out (s, drv);
1614         audio_init_nb_voices_in (s, drv);
1615         s->drv = drv;
1616         return 0;
1617     }
1618     else {
1619         dolog ("Could not init `%s' audio driver\n", drv->name);
1620         return -1;
1621     }
1622 }
1623
1624 static void audio_vm_change_state_handler (void *opaque, int running,
1625                                            int reason)
1626 {
1627     AudioState *s = opaque;
1628     HWVoiceOut *hwo = NULL;
1629     HWVoiceIn *hwi = NULL;
1630     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1631
1632     s->vm_running = running;
1633     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1634         hwo->pcm_ops->ctl_out (hwo, op);
1635     }
1636
1637     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1638         hwi->pcm_ops->ctl_in (hwi, op);
1639     }
1640 }
1641
1642 static void audio_atexit (void)
1643 {
1644     AudioState *s = &glob_audio_state;
1645     HWVoiceOut *hwo = NULL;
1646     HWVoiceIn *hwi = NULL;
1647
1648     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1649         SWVoiceCap *sc;
1650
1651         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1652         hwo->pcm_ops->fini_out (hwo);
1653
1654         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1655             CaptureVoiceOut *cap = sc->cap;
1656             struct capture_callback *cb;
1657
1658             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1659                 cb->ops.destroy (cb->opaque);
1660             }
1661         }
1662     }
1663
1664     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1665         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1666         hwi->pcm_ops->fini_in (hwi);
1667     }
1668
1669     if (s->drv) {
1670         s->drv->fini (s->drv_opaque);
1671     }
1672 }
1673
1674 static void audio_save (QEMUFile *f, void *opaque)
1675 {
1676     (void) f;
1677     (void) opaque;
1678 }
1679
1680 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1681 {
1682     (void) f;
1683     (void) opaque;
1684
1685     if (version_id != 1) {
1686         return -EINVAL;
1687     }
1688
1689     return 0;
1690 }
1691
1692 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1693 {
1694     card->audio = s;
1695     card->name = qemu_strdup (name);
1696     memset (&card->entries, 0, sizeof (card->entries));
1697     LIST_INSERT_HEAD (&s->card_head, card, entries);
1698 }
1699
1700 void AUD_remove_card (QEMUSoundCard *card)
1701 {
1702     LIST_REMOVE (card, entries);
1703     card->audio = NULL;
1704     qemu_free (card->name);
1705 }
1706
1707 AudioState *AUD_init (void)
1708 {
1709     size_t i;
1710     int done = 0;
1711     const char *drvname;
1712     AudioState *s = &glob_audio_state;
1713
1714     LIST_INIT (&s->hw_head_out);
1715     LIST_INIT (&s->hw_head_in);
1716     LIST_INIT (&s->cap_head);
1717     atexit (audio_atexit);
1718
1719     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1720     if (!s->ts) {
1721         dolog ("Could not create audio timer\n");
1722         return NULL;
1723     }
1724
1725     audio_process_options ("AUDIO", audio_options);
1726
1727     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1728     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1729
1730     if (s->nb_hw_voices_out <= 0) {
1731         dolog ("Bogus number of playback voices %d, setting to 1\n",
1732                s->nb_hw_voices_out);
1733         s->nb_hw_voices_out = 1;
1734     }
1735
1736     if (s->nb_hw_voices_in <= 0) {
1737         dolog ("Bogus number of capture voices %d, setting to 0\n",
1738                s->nb_hw_voices_in);
1739         s->nb_hw_voices_in = 0;
1740     }
1741
1742     {
1743         int def;
1744         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1745     }
1746
1747     if (drvname) {
1748         int found = 0;
1749
1750         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1751             if (!strcmp (drvname, drvtab[i]->name)) {
1752                 done = !audio_driver_init (s, drvtab[i]);
1753                 found = 1;
1754                 break;
1755             }
1756         }
1757
1758         if (!found) {
1759             dolog ("Unknown audio driver `%s'\n", drvname);
1760             dolog ("Run with -audio-help to list available drivers\n");
1761         }
1762     }
1763
1764     if (!done) {
1765         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1766             if (drvtab[i]->can_be_default) {
1767                 done = !audio_driver_init (s, drvtab[i]);
1768             }
1769         }
1770     }
1771
1772     if (!done) {
1773         done = !audio_driver_init (s, &no_audio_driver);
1774         if (!done) {
1775             dolog ("Could not initialize audio subsystem\n");
1776         }
1777         else {
1778             dolog ("warning: Using timer based audio emulation\n");
1779         }
1780     }
1781
1782     if (done) {
1783         VMChangeStateEntry *e;
1784
1785         if (conf.period.hertz <= 0) {
1786             if (conf.period.hertz < 0) {
1787                 dolog ("warning: Timer period is negative - %d "
1788                        "treating as zero\n",
1789                        conf.period.hertz);
1790             }
1791             conf.period.ticks = 1;
1792         }
1793         else {
1794             conf.period.ticks = ticks_per_sec / conf.period.hertz;
1795         }
1796
1797         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1798         if (!e) {
1799             dolog ("warning: Could not register change state handler\n"
1800                    "(Audio can continue looping even after stopping the VM)\n");
1801         }
1802     }
1803     else {
1804         qemu_del_timer (s->ts);
1805         return NULL;
1806     }
1807
1808     LIST_INIT (&s->card_head);
1809     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1810     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1811     return s;
1812 }
1813
1814 CaptureVoiceOut *AUD_add_capture (
1815     AudioState *s,
1816     struct audsettings *as,
1817     struct audio_capture_ops *ops,
1818     void *cb_opaque
1819     )
1820 {
1821     CaptureVoiceOut *cap;
1822     struct capture_callback *cb;
1823
1824     if (!s) {
1825         /* XXX suppress */
1826         s = &glob_audio_state;
1827     }
1828
1829     if (audio_validate_settings (as)) {
1830         dolog ("Invalid settings were passed when trying to add capture\n");
1831         audio_print_settings (as);
1832         goto err0;
1833     }
1834
1835     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1836     if (!cb) {
1837         dolog ("Could not allocate capture callback information, size %zu\n",
1838                sizeof (*cb));
1839         goto err0;
1840     }
1841     cb->ops = *ops;
1842     cb->opaque = cb_opaque;
1843
1844     cap = audio_pcm_capture_find_specific (s, as);
1845     if (cap) {
1846         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1847         return cap;
1848     }
1849     else {
1850         HWVoiceOut *hw;
1851         CaptureVoiceOut *cap;
1852
1853         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1854         if (!cap) {
1855             dolog ("Could not allocate capture voice, size %zu\n",
1856                    sizeof (*cap));
1857             goto err1;
1858         }
1859
1860         hw = &cap->hw;
1861         LIST_INIT (&hw->sw_head);
1862         LIST_INIT (&cap->cb_head);
1863
1864         /* XXX find a more elegant way */
1865         hw->samples = 4096 * 4;
1866         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1867                                     sizeof (struct st_sample));
1868         if (!hw->mix_buf) {
1869             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1870                    hw->samples);
1871             goto err2;
1872         }
1873
1874         audio_pcm_init_info (&hw->info, as);
1875
1876         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1877         if (!cap->buf) {
1878             dolog ("Could not allocate capture buffer "
1879                    "(%d samples, each %d bytes)\n",
1880                    hw->samples, 1 << hw->info.shift);
1881             goto err3;
1882         }
1883
1884         hw->clip = mixeng_clip
1885             [hw->info.nchannels == 2]
1886             [hw->info.sign]
1887             [hw->info.swap_endianness]
1888             [audio_bits_to_index (hw->info.bits)];
1889
1890         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1891         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1892
1893         hw = NULL;
1894         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1895             audio_attach_capture (s, hw);
1896         }
1897         return cap;
1898
1899     err3:
1900         qemu_free (cap->hw.mix_buf);
1901     err2:
1902         qemu_free (cap);
1903     err1:
1904         qemu_free (cb);
1905     err0:
1906         return NULL;
1907     }
1908 }
1909
1910 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1911 {
1912     struct capture_callback *cb;
1913
1914     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1915         if (cb->opaque == cb_opaque) {
1916             cb->ops.destroy (cb_opaque);
1917             LIST_REMOVE (cb, entries);
1918             qemu_free (cb);
1919
1920             if (!cap->cb_head.lh_first) {
1921                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1922
1923                 while (sw) {
1924                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1925 #ifdef DEBUG_CAPTURE
1926                     dolog ("freeing %s\n", sw->name);
1927 #endif
1928
1929                     sw1 = sw->entries.le_next;
1930                     if (sw->rate) {
1931                         st_rate_stop (sw->rate);
1932                         sw->rate = NULL;
1933                     }
1934                     LIST_REMOVE (sw, entries);
1935                     LIST_REMOVE (sc, entries);
1936                     qemu_free (sc);
1937                     sw = sw1;
1938                 }
1939                 LIST_REMOVE (cap, entries);
1940                 qemu_free (cap);
1941             }
1942             return;
1943         }
1944     }
1945 }
1946
1947 void AUD_set_volume_out (SWVoiceOut *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 }
1955
1956 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1957 {
1958     if (sw) {
1959         sw->vol.mute = mute;
1960         sw->vol.l = nominal_volume.l * lvol / 255;
1961         sw->vol.r = nominal_volume.r * rvol / 255;
1962     }
1963 }