audio/audio.c

   1 /*
   2  * QEMU Audio subsystem
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw/hw.h"
  25 #include "audio.h"
  26 #include "console.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 #define AUDIO_CAP "audio"
  31 #include "audio_int.h"
  32
  33 /* #define DEBUG_PLIVE */
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37
  38 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  39
  40 static struct audio_driver *drvtab[] = {
  41     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             term_printf ("%s: ", cap);
 332         }
 333
 334         term_vprintf (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         SWVoiceOut *temp_sw;
1131         SWVoiceCap *sc;
1132
1133         if (on) {
1134             hw->pending_disable = 0;
1135             if (!hw->enabled) {
1136                 hw->enabled = 1;
1137                 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1138             }
1139         }
1140         else {
1141             if (hw->enabled) {
1142                 int nb_active = 0;
1143
1144                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1145                      temp_sw = temp_sw->entries.le_next) {
1146                     nb_active += temp_sw->active != 0;
1147                 }
1148
1149                 hw->pending_disable = nb_active == 1;
1150             }
1151         }
1152
1153         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1154             sc->sw.active = hw->enabled;
1155             if (hw->enabled) {
1156                 audio_capture_maybe_changed (sc->cap, 1);
1157             }
1158         }
1159         sw->active = on;
1160     }
1161 }
1162
1163 void AUD_set_active_in (SWVoiceIn *sw, int on)
1164 {
1165     HWVoiceIn *hw;
1166
1167     if (!sw) {
1168         return;
1169     }
1170
1171     hw = sw->hw;
1172     if (sw->active != on) {
1173         SWVoiceIn *temp_sw;
1174
1175         if (on) {
1176             if (!hw->enabled) {
1177                 hw->enabled = 1;
1178                 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1179             }
1180             sw->total_hw_samples_acquired = hw->total_samples_captured;
1181         }
1182         else {
1183             if (hw->enabled) {
1184                 int nb_active = 0;
1185
1186                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1187                      temp_sw = temp_sw->entries.le_next) {
1188                     nb_active += temp_sw->active != 0;
1189                 }
1190
1191                 if (nb_active == 1) {
1192                     hw->enabled = 0;
1193                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1194                 }
1195             }
1196         }
1197         sw->active = on;
1198     }
1199 }
1200
1201 static int audio_get_avail (SWVoiceIn *sw)
1202 {
1203     int live;
1204
1205     if (!sw) {
1206         return 0;
1207     }
1208
1209     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1210     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1211         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1212         return 0;
1213     }
1214
1215     ldebug (
1216         "%s: get_avail live %d ret %" PRId64 "\n",
1217         SW_NAME (sw),
1218         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1219         );
1220
1221     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1222 }
1223
1224 static int audio_get_free (SWVoiceOut *sw)
1225 {
1226     int live, dead;
1227
1228     if (!sw) {
1229         return 0;
1230     }
1231
1232     live = sw->total_hw_samples_mixed;
1233
1234     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1235         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1236         return 0;
1237     }
1238
1239     dead = sw->hw->samples - live;
1240
1241 #ifdef DEBUG_OUT
1242     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1243            SW_NAME (sw),
1244            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1245 #endif
1246
1247     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1248 }
1249
1250 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1251 {
1252     int n;
1253
1254     if (hw->enabled) {
1255         SWVoiceCap *sc;
1256
1257         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1258             SWVoiceOut *sw = &sc->sw;
1259             int rpos2 = rpos;
1260
1261             n = samples;
1262             while (n) {
1263                 int till_end_of_hw = hw->samples - rpos2;
1264                 int to_write = audio_MIN (till_end_of_hw, n);
1265                 int bytes = to_write << hw->info.shift;
1266                 int written;
1267
1268                 sw->buf = hw->mix_buf + rpos2;
1269                 written = audio_pcm_sw_write (sw, NULL, bytes);
1270                 if (written - bytes) {
1271                     dolog ("Could not mix %d bytes into a capture "
1272                            "buffer, mixed %d\n",
1273                            bytes, written);
1274                     break;
1275                 }
1276                 n -= to_write;
1277                 rpos2 = (rpos2 + to_write) % hw->samples;
1278             }
1279         }
1280     }
1281
1282     n = audio_MIN (samples, hw->samples - rpos);
1283     mixeng_clear (hw->mix_buf + rpos, n);
1284     mixeng_clear (hw->mix_buf, samples - n);
1285 }
1286
1287 static void audio_run_out (AudioState *s)
1288 {
1289     HWVoiceOut *hw = NULL;
1290     SWVoiceOut *sw;
1291
1292     while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1293         int played;
1294         int live, free, nb_live, cleanup_required, prev_rpos;
1295
1296         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1297         if (!nb_live) {
1298             live = 0;
1299         }
1300
1301         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1302             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1303             continue;
1304         }
1305
1306         if (hw->pending_disable && !nb_live) {
1307             SWVoiceCap *sc;
1308 #ifdef DEBUG_OUT
1309             dolog ("Disabling voice\n");
1310 #endif
1311             hw->enabled = 0;
1312             hw->pending_disable = 0;
1313             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1314             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1315                 sc->sw.active = 0;
1316                 audio_recalc_and_notify_capture (sc->cap);
1317             }
1318             continue;
1319         }
1320
1321         if (!live) {
1322             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1323                 if (sw->active) {
1324                     free = audio_get_free (sw);
1325                     if (free > 0) {
1326                         sw->callback.fn (sw->callback.opaque, free);
1327                     }
1328                 }
1329             }
1330             continue;
1331         }
1332
1333         prev_rpos = hw->rpos;
1334         played = hw->pcm_ops->run_out (hw);
1335         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1336             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1337                    hw->rpos, hw->samples, played);
1338             hw->rpos = 0;
1339         }
1340
1341 #ifdef DEBUG_OUT
1342         dolog ("played=%d\n", played);
1343 #endif
1344
1345         if (played) {
1346             hw->ts_helper += played;
1347             audio_capture_mix_and_clear (hw, prev_rpos, played);
1348         }
1349
1350         cleanup_required = 0;
1351         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1352             if (!sw->active && sw->empty) {
1353                 continue;
1354             }
1355
1356             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1357                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1358                        played, sw->total_hw_samples_mixed);
1359                 played = sw->total_hw_samples_mixed;
1360             }
1361
1362             sw->total_hw_samples_mixed -= played;
1363
1364             if (!sw->total_hw_samples_mixed) {
1365                 sw->empty = 1;
1366                 cleanup_required |= !sw->active && !sw->callback.fn;
1367             }
1368
1369             if (sw->active) {
1370                 free = audio_get_free (sw);
1371                 if (free > 0) {
1372                     sw->callback.fn (sw->callback.opaque, free);
1373                 }
1374             }
1375         }
1376
1377         if (cleanup_required) {
1378             SWVoiceOut *sw1;
1379
1380             sw = hw->sw_head.lh_first;
1381             while (sw) {
1382                 sw1 = sw->entries.le_next;
1383                 if (!sw->active && !sw->callback.fn) {
1384 #ifdef DEBUG_PLIVE
1385                     dolog ("Finishing with old voice\n");
1386 #endif
1387                     audio_close_out (s, sw);
1388                 }
1389                 sw = sw1;
1390             }
1391         }
1392     }
1393 }
1394
1395 static void audio_run_in (AudioState *s)
1396 {
1397     HWVoiceIn *hw = NULL;
1398
1399     while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1400         SWVoiceIn *sw;
1401         int captured, min;
1402
1403         captured = hw->pcm_ops->run_in (hw);
1404
1405         min = audio_pcm_hw_find_min_in (hw);
1406         hw->total_samples_captured += captured - min;
1407         hw->ts_helper += captured;
1408
1409         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1410             sw->total_hw_samples_acquired -= min;
1411
1412             if (sw->active) {
1413                 int avail;
1414
1415                 avail = audio_get_avail (sw);
1416                 if (avail > 0) {
1417                     sw->callback.fn (sw->callback.opaque, avail);
1418                 }
1419             }
1420         }
1421     }
1422 }
1423
1424 static void audio_run_capture (AudioState *s)
1425 {
1426     CaptureVoiceOut *cap;
1427
1428     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1429         int live, rpos, captured;
1430         HWVoiceOut *hw = &cap->hw;
1431         SWVoiceOut *sw;
1432
1433         captured = live = audio_pcm_hw_get_live_out (hw);
1434         rpos = hw->rpos;
1435         while (live) {
1436             int left = hw->samples - rpos;
1437             int to_capture = audio_MIN (live, left);
1438             struct st_sample *src;
1439             struct capture_callback *cb;
1440
1441             src = hw->mix_buf + rpos;
1442             hw->clip (cap->buf, src, to_capture);
1443             mixeng_clear (src, to_capture);
1444
1445             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1446                 cb->ops.capture (cb->opaque, cap->buf,
1447                                  to_capture << hw->info.shift);
1448             }
1449             rpos = (rpos + to_capture) % hw->samples;
1450             live -= to_capture;
1451         }
1452         hw->rpos = rpos;
1453
1454         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1455             if (!sw->active && sw->empty) {
1456                 continue;
1457             }
1458
1459             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1460                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1461                        captured, sw->total_hw_samples_mixed);
1462                 captured = sw->total_hw_samples_mixed;
1463             }
1464
1465             sw->total_hw_samples_mixed -= captured;
1466             sw->empty = sw->total_hw_samples_mixed == 0;
1467         }
1468     }
1469 }
1470
1471 static void audio_timer (void *opaque)
1472 {
1473     AudioState *s = opaque;
1474
1475     audio_run_out (s);
1476     audio_run_in (s);
1477     audio_run_capture (s);
1478
1479     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1480 }
1481
1482 static struct audio_option audio_options[] = {
1483     /* DAC */
1484     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1485      "Use fixed settings for host DAC", NULL, 0},
1486
1487     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1488      "Frequency for fixed host DAC", NULL, 0},
1489
1490     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1491      "Format for fixed host DAC", NULL, 0},
1492
1493     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1494      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1495
1496     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1497      "Number of voices for DAC", NULL, 0},
1498
1499     /* ADC */
1500     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1501      "Use fixed settings for host ADC", NULL, 0},
1502
1503     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1504      "Frequency for fixed host ADC", NULL, 0},
1505
1506     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1507      "Format for fixed host ADC", NULL, 0},
1508
1509     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1510      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1511
1512     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1513      "Number of voices for ADC", NULL, 0},
1514
1515     /* Misc */
1516     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hertz,
1517      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1518
1519     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1520      "(undocumented)", NULL, 0},
1521
1522     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1523      "print logging messages to monitor instead of stderr", NULL, 0},
1524
1525     {NULL, 0, NULL, NULL, NULL, 0}
1526 };
1527
1528 static void audio_pp_nb_voices (const char *typ, int nb)
1529 {
1530     switch (nb) {
1531     case 0:
1532         printf ("Does not support %s\n", typ);
1533         break;
1534     case 1:
1535         printf ("One %s voice\n", typ);
1536         break;
1537     case INT_MAX:
1538         printf ("Theoretically supports many %s voices\n", typ);
1539         break;
1540     default:
1541         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1542         break;
1543     }
1544
1545 }
1546
1547 void AUD_help (void)
1548 {
1549     size_t i;
1550
1551     audio_process_options ("AUDIO", audio_options);
1552     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1553         struct audio_driver *d = drvtab[i];
1554         if (d->options) {
1555             audio_process_options (d->name, d->options);
1556         }
1557     }
1558
1559     printf ("Audio options:\n");
1560     audio_print_options ("AUDIO", audio_options);
1561     printf ("\n");
1562
1563     printf ("Available drivers:\n");
1564
1565     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1566         struct audio_driver *d = drvtab[i];
1567
1568         printf ("Name: %s\n", d->name);
1569         printf ("Description: %s\n", d->descr);
1570
1571         audio_pp_nb_voices ("playback", d->max_voices_out);
1572         audio_pp_nb_voices ("capture", d->max_voices_in);
1573
1574         if (d->options) {
1575             printf ("Options:\n");
1576             audio_print_options (d->name, d->options);
1577         }
1578         else {
1579             printf ("No options\n");
1580         }
1581         printf ("\n");
1582     }
1583
1584     printf (
1585         "Options are settable through environment variables.\n"
1586         "Example:\n"
1587 #ifdef _WIN32
1588         "  set QEMU_AUDIO_DRV=wav\n"
1589         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1590 #else
1591         "  export QEMU_AUDIO_DRV=wav\n"
1592         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1593         "(for csh replace export with setenv in the above)\n"
1594 #endif
1595         "  qemu ...\n\n"
1596         );
1597 }
1598
1599 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1600 {
1601     if (drv->options) {
1602         audio_process_options (drv->name, drv->options);
1603     }
1604     s->drv_opaque = drv->init ();
1605
1606     if (s->drv_opaque) {
1607         audio_init_nb_voices_out (s, drv);
1608         audio_init_nb_voices_in (s, drv);
1609         s->drv = drv;
1610         return 0;
1611     }
1612     else {
1613         dolog ("Could not init `%s' audio driver\n", drv->name);
1614         return -1;
1615     }
1616 }
1617
1618 static void audio_vm_change_state_handler (void *opaque, int running,
1619                                            int reason)
1620 {
1621     AudioState *s = opaque;
1622     HWVoiceOut *hwo = NULL;
1623     HWVoiceIn *hwi = NULL;
1624     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1625
1626     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1627         hwo->pcm_ops->ctl_out (hwo, op);
1628     }
1629
1630     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1631         hwi->pcm_ops->ctl_in (hwi, op);
1632     }
1633 }
1634
1635 static void audio_atexit (void)
1636 {
1637     AudioState *s = &glob_audio_state;
1638     HWVoiceOut *hwo = NULL;
1639     HWVoiceIn *hwi = NULL;
1640
1641     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1642         SWVoiceCap *sc;
1643
1644         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1645         hwo->pcm_ops->fini_out (hwo);
1646
1647         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1648             CaptureVoiceOut *cap = sc->cap;
1649             struct capture_callback *cb;
1650
1651             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1652                 cb->ops.destroy (cb->opaque);
1653             }
1654         }
1655     }
1656
1657     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1658         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1659         hwi->pcm_ops->fini_in (hwi);
1660     }
1661
1662     if (s->drv) {
1663         s->drv->fini (s->drv_opaque);
1664     }
1665 }
1666
1667 static void audio_save (QEMUFile *f, void *opaque)
1668 {
1669     (void) f;
1670     (void) opaque;
1671 }
1672
1673 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1674 {
1675     (void) f;
1676     (void) opaque;
1677
1678     if (version_id != 1) {
1679         return -EINVAL;
1680     }
1681
1682     return 0;
1683 }
1684
1685 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1686 {
1687     card->audio = s;
1688     card->name = qemu_strdup (name);
1689     memset (&card->entries, 0, sizeof (card->entries));
1690     LIST_INSERT_HEAD (&s->card_head, card, entries);
1691 }
1692
1693 void AUD_remove_card (QEMUSoundCard *card)
1694 {
1695     LIST_REMOVE (card, entries);
1696     card->audio = NULL;
1697     qemu_free (card->name);
1698 }
1699
1700 AudioState *AUD_init (void)
1701 {
1702     size_t i;
1703     int done = 0;
1704     const char *drvname;
1705     AudioState *s = &glob_audio_state;
1706
1707     LIST_INIT (&s->hw_head_out);
1708     LIST_INIT (&s->hw_head_in);
1709     LIST_INIT (&s->cap_head);
1710     atexit (audio_atexit);
1711
1712     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1713     if (!s->ts) {
1714         dolog ("Could not create audio timer\n");
1715         return NULL;
1716     }
1717
1718     audio_process_options ("AUDIO", audio_options);
1719
1720     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1721     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1722
1723     if (s->nb_hw_voices_out <= 0) {
1724         dolog ("Bogus number of playback voices %d, setting to 1\n",
1725                s->nb_hw_voices_out);
1726         s->nb_hw_voices_out = 1;
1727     }
1728
1729     if (s->nb_hw_voices_in <= 0) {
1730         dolog ("Bogus number of capture voices %d, setting to 0\n",
1731                s->nb_hw_voices_in);
1732         s->nb_hw_voices_in = 0;
1733     }
1734
1735     {
1736         int def;
1737         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1738     }
1739
1740     if (drvname) {
1741         int found = 0;
1742
1743         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1744             if (!strcmp (drvname, drvtab[i]->name)) {
1745                 done = !audio_driver_init (s, drvtab[i]);
1746                 found = 1;
1747                 break;
1748             }
1749         }
1750
1751         if (!found) {
1752             dolog ("Unknown audio driver `%s'\n", drvname);
1753             dolog ("Run with -audio-help to list available drivers\n");
1754         }
1755     }
1756
1757     if (!done) {
1758         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1759             if (drvtab[i]->can_be_default) {
1760                 done = !audio_driver_init (s, drvtab[i]);
1761             }
1762         }
1763     }
1764
1765     if (!done) {
1766         done = !audio_driver_init (s, &no_audio_driver);
1767         if (!done) {
1768             dolog ("Could not initialize audio subsystem\n");
1769         }
1770         else {
1771             dolog ("warning: Using timer based audio emulation\n");
1772         }
1773     }
1774
1775     if (done) {
1776         VMChangeStateEntry *e;
1777
1778         if (conf.period.hertz <= 0) {
1779             if (conf.period.hertz < 0) {
1780                 dolog ("warning: Timer period is negative - %d "
1781                        "treating as zero\n",
1782                        conf.period.hertz);
1783             }
1784             conf.period.ticks = 1;
1785         }
1786         else {
1787             conf.period.ticks = ticks_per_sec / conf.period.hertz;
1788         }
1789
1790         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1791         if (!e) {
1792             dolog ("warning: Could not register change state handler\n"
1793                    "(Audio can continue looping even after stopping the VM)\n");
1794         }
1795     }
1796     else {
1797         qemu_del_timer (s->ts);
1798         return NULL;
1799     }
1800
1801     LIST_INIT (&s->card_head);
1802     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1803     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1804     return s;
1805 }
1806
1807 CaptureVoiceOut *AUD_add_capture (
1808     AudioState *s,
1809     struct audsettings *as,
1810     struct audio_capture_ops *ops,
1811     void *cb_opaque
1812     )
1813 {
1814     CaptureVoiceOut *cap;
1815     struct capture_callback *cb;
1816
1817     if (!s) {
1818         /* XXX suppress */
1819         s = &glob_audio_state;
1820     }
1821
1822     if (audio_validate_settings (as)) {
1823         dolog ("Invalid settings were passed when trying to add capture\n");
1824         audio_print_settings (as);
1825         goto err0;
1826     }
1827
1828     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1829     if (!cb) {
1830         dolog ("Could not allocate capture callback information, size %zu\n",
1831                sizeof (*cb));
1832         goto err0;
1833     }
1834     cb->ops = *ops;
1835     cb->opaque = cb_opaque;
1836
1837     cap = audio_pcm_capture_find_specific (s, as);
1838     if (cap) {
1839         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1840         return cap;
1841     }
1842     else {
1843         HWVoiceOut *hw;
1844         CaptureVoiceOut *cap;
1845
1846         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1847         if (!cap) {
1848             dolog ("Could not allocate capture voice, size %zu\n",
1849                    sizeof (*cap));
1850             goto err1;
1851         }
1852
1853         hw = &cap->hw;
1854         LIST_INIT (&hw->sw_head);
1855         LIST_INIT (&cap->cb_head);
1856
1857         /* XXX find a more elegant way */
1858         hw->samples = 4096 * 4;
1859         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1860                                     sizeof (struct st_sample));
1861         if (!hw->mix_buf) {
1862             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1863                    hw->samples);
1864             goto err2;
1865         }
1866
1867         audio_pcm_init_info (&hw->info, as);
1868
1869         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1870         if (!cap->buf) {
1871             dolog ("Could not allocate capture buffer "
1872                    "(%d samples, each %d bytes)\n",
1873                    hw->samples, 1 << hw->info.shift);
1874             goto err3;
1875         }
1876
1877         hw->clip = mixeng_clip
1878             [hw->info.nchannels == 2]
1879             [hw->info.sign]
1880             [hw->info.swap_endianness]
1881             [audio_bits_to_index (hw->info.bits)];
1882
1883         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1884         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1885
1886         hw = NULL;
1887         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1888             audio_attach_capture (s, hw);
1889         }
1890         return cap;
1891
1892     err3:
1893         qemu_free (cap->hw.mix_buf);
1894     err2:
1895         qemu_free (cap);
1896     err1:
1897         qemu_free (cb);
1898     err0:
1899         return NULL;
1900     }
1901 }
1902
1903 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1904 {
1905     struct capture_callback *cb;
1906
1907     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1908         if (cb->opaque == cb_opaque) {
1909             cb->ops.destroy (cb_opaque);
1910             LIST_REMOVE (cb, entries);
1911             qemu_free (cb);
1912
1913             if (!cap->cb_head.lh_first) {
1914                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1915
1916                 while (sw) {
1917                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1918 #ifdef DEBUG_CAPTURE
1919                     dolog ("freeing %s\n", sw->name);
1920 #endif
1921
1922                     sw1 = sw->entries.le_next;
1923                     if (sw->rate) {
1924                         st_rate_stop (sw->rate);
1925                         sw->rate = NULL;
1926                     }
1927                     LIST_REMOVE (sw, entries);
1928                     LIST_REMOVE (sc, entries);
1929                     qemu_free (sc);
1930                     sw = sw1;
1931                 }
1932                 LIST_REMOVE (cap, entries);
1933                 qemu_free (cap);
1934             }
1935             return;
1936         }
1937     }
1938 }
1939
1940 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1941 {
1942     if (sw) {
1943         sw->vol.mute = mute;
1944         sw->vol.l = nominal_volume.l * lvol / 255;
1945         sw->vol.r = nominal_volume.r * rvol / 255;
1946     }
1947 }
1948
1949 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1950 {
1951     if (sw) {
1952         sw->vol.mute = mute;
1953         sw->vol.l = nominal_volume.l * lvol / 255;
1954         sw->vol.r = nominal_volume.r * rvol / 255;
1955     }
1956 }