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     audsettings_t settings;
  51 };
  52
  53 static struct {
  54     struct fixed_settings fixed_out;
  55     struct fixed_settings fixed_in;
  56     union {
  57         int hz;
  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     { 0 },                      /* period */
  88     0,                          /* plive */
  89     0                           /* log_to_monitor */
  90 };
  91
  92 static AudioState glob_audio_state;
  93
  94 volume_t 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;
 201     char *r;
 202
 203     if (!s) {
 204         return NULL;
 205     }
 206
 207     len = strlen (s);
 208     r = qemu_malloc (len + sizeof (qemu_prefix));
 209
 210     if (r) {
 211         size_t i;
 212         char *u = r + sizeof (qemu_prefix) - 1;
 213
 214         strcpy (r, qemu_prefix);
 215         strcat (r, s);
 216
 217         for (i = 0; i < len; ++i) {
 218             u[i] = toupper (u[i]);
 219         }
 220     }
 221     return r;
 222 }
 223
 224 static const char *audio_audfmt_to_string (audfmt_e fmt)
 225 {
 226     switch (fmt) {
 227     case AUD_FMT_U8:
 228         return "U8";
 229
 230     case AUD_FMT_U16:
 231         return "U16";
 232
 233     case AUD_FMT_S8:
 234         return "S8";
 235
 236     case AUD_FMT_S16:
 237         return "S16";
 238
 239     case AUD_FMT_U32:
 240         return "U32";
 241
 242     case AUD_FMT_S32:
 243         return "S32";
 244     }
 245
 246     dolog ("Bogus audfmt %d returning S16\n", fmt);
 247     return "S16";
 248 }
 249
 250 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 251                                         int *defaultp)
 252 {
 253     if (!strcasecmp (s, "u8")) {
 254         *defaultp = 0;
 255         return AUD_FMT_U8;
 256     }
 257     else if (!strcasecmp (s, "u16")) {
 258         *defaultp = 0;
 259         return AUD_FMT_U16;
 260     }
 261     else if (!strcasecmp (s, "u32")) {
 262         *defaultp = 0;
 263         return AUD_FMT_U32;
 264     }
 265     else if (!strcasecmp (s, "s8")) {
 266         *defaultp = 0;
 267         return AUD_FMT_S8;
 268     }
 269     else if (!strcasecmp (s, "s16")) {
 270         *defaultp = 0;
 271         return AUD_FMT_S16;
 272     }
 273     else if (!strcasecmp (s, "s32")) {
 274         *defaultp = 0;
 275         return AUD_FMT_S32;
 276     }
 277     else {
 278         dolog ("Bogus audio format `%s' using %s\n",
 279                s, audio_audfmt_to_string (defval));
 280         *defaultp = 1;
 281         return defval;
 282     }
 283 }
 284
 285 static audfmt_e audio_get_conf_fmt (const char *envname,
 286                                     audfmt_e defval,
 287                                     int *defaultp)
 288 {
 289     const char *var = getenv (envname);
 290     if (!var) {
 291         *defaultp = 1;
 292         return defval;
 293     }
 294     return audio_string_to_audfmt (var, defval, defaultp);
 295 }
 296
 297 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 298 {
 299     int val;
 300     char *strval;
 301
 302     strval = getenv (key);
 303     if (strval) {
 304         *defaultp = 0;
 305         val = atoi (strval);
 306         return val;
 307     }
 308     else {
 309         *defaultp = 1;
 310         return defval;
 311     }
 312 }
 313
 314 static const char *audio_get_conf_str (const char *key,
 315                                        const char *defval,
 316                                        int *defaultp)
 317 {
 318     const char *val = getenv (key);
 319     if (!val) {
 320         *defaultp = 1;
 321         return defval;
 322     }
 323     else {
 324         *defaultp = 0;
 325         return val;
 326     }
 327 }
 328
 329 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 330 {
 331     if (conf.log_to_monitor) {
 332         if (cap) {
 333             term_printf ("%s: ", cap);
 334         }
 335
 336         term_vprintf (fmt, ap);
 337     }
 338     else {
 339         if (cap) {
 340             fprintf (stderr, "%s: ", cap);
 341         }
 342
 343         vfprintf (stderr, fmt, ap);
 344     }
 345 }
 346
 347 void AUD_log (const char *cap, const char *fmt, ...)
 348 {
 349     va_list ap;
 350
 351     va_start (ap, fmt);
 352     AUD_vlog (cap, fmt, ap);
 353     va_end (ap);
 354 }
 355
 356 static void audio_print_options (const char *prefix,
 357                                  struct audio_option *opt)
 358 {
 359     char *uprefix;
 360
 361     if (!prefix) {
 362         dolog ("No prefix specified\n");
 363         return;
 364     }
 365
 366     if (!opt) {
 367         dolog ("No options\n");
 368         return;
 369     }
 370
 371     uprefix = audio_alloc_prefix (prefix);
 372
 373     for (; opt->name; opt++) {
 374         const char *state = "default";
 375         printf ("  %s_%s: ", uprefix, opt->name);
 376
 377         if (opt->overriddenp && *opt->overriddenp) {
 378             state = "current";
 379         }
 380
 381         switch (opt->tag) {
 382         case AUD_OPT_BOOL:
 383             {
 384                 int *intp = opt->valp;
 385                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 386             }
 387             break;
 388
 389         case AUD_OPT_INT:
 390             {
 391                 int *intp = opt->valp;
 392                 printf ("integer, %s = %d\n", state, *intp);
 393             }
 394             break;
 395
 396         case AUD_OPT_FMT:
 397             {
 398                 audfmt_e *fmtp = opt->valp;
 399                 printf (
 400                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 401                     state,
 402                     audio_audfmt_to_string (*fmtp)
 403                     );
 404             }
 405             break;
 406
 407         case AUD_OPT_STR:
 408             {
 409                 const char **strp = opt->valp;
 410                 printf ("string, %s = %s\n",
 411                         state,
 412                         *strp ? *strp : "(not set)");
 413             }
 414             break;
 415
 416         default:
 417             printf ("???\n");
 418             dolog ("Bad value tag for option %s_%s %d\n",
 419                    uprefix, opt->name, opt->tag);
 420             break;
 421         }
 422         printf ("    %s\n", opt->descr);
 423     }
 424
 425     qemu_free (uprefix);
 426 }
 427
 428 static void audio_process_options (const char *prefix,
 429                                    struct audio_option *opt)
 430 {
 431     char *optname;
 432     const char qemu_prefix[] = "QEMU_";
 433     size_t preflen;
 434
 435     if (audio_bug (AUDIO_FUNC, !prefix)) {
 436         dolog ("prefix = NULL\n");
 437         return;
 438     }
 439
 440     if (audio_bug (AUDIO_FUNC, !opt)) {
 441         dolog ("opt = NULL\n");
 442         return;
 443     }
 444
 445     preflen = strlen (prefix);
 446
 447     for (; opt->name; opt++) {
 448         size_t len, i;
 449         int def;
 450
 451         if (!opt->valp) {
 452             dolog ("Option value pointer for `%s' is not set\n",
 453                    opt->name);
 454             continue;
 455         }
 456
 457         len = strlen (opt->name);
 458         /* len of opt->name + len of prefix + size of qemu_prefix
 459          * (includes trailing zero) + zero + underscore (on behalf of
 460          * sizeof) */
 461         optname = qemu_malloc (len + preflen + sizeof (qemu_prefix) + 1);
 462         if (!optname) {
 463             dolog ("Could not allocate memory for option name `%s'\n",
 464                    opt->name);
 465             continue;
 466         }
 467
 468         strcpy (optname, qemu_prefix);
 469
 470         /* copy while upper-casing, including trailing zero */
 471         for (i = 0; i <= preflen; ++i) {
 472             optname[i + sizeof (qemu_prefix) - 1] = toupper (prefix[i]);
 473         }
 474         strcat (optname, "_");
 475         strcat (optname, opt->name);
 476
 477         def = 1;
 478         switch (opt->tag) {
 479         case AUD_OPT_BOOL:
 480         case AUD_OPT_INT:
 481             {
 482                 int *intp = opt->valp;
 483                 *intp = audio_get_conf_int (optname, *intp, &def);
 484             }
 485             break;
 486
 487         case AUD_OPT_FMT:
 488             {
 489                 audfmt_e *fmtp = opt->valp;
 490                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 491             }
 492             break;
 493
 494         case AUD_OPT_STR:
 495             {
 496                 const char **strp = opt->valp;
 497                 *strp = audio_get_conf_str (optname, *strp, &def);
 498             }
 499             break;
 500
 501         default:
 502             dolog ("Bad value tag for option `%s' - %d\n",
 503                    optname, opt->tag);
 504             break;
 505         }
 506
 507         if (!opt->overriddenp) {
 508             opt->overriddenp = &opt->overridden;
 509         }
 510         *opt->overriddenp = !def;
 511         qemu_free (optname);
 512     }
 513 }
 514
 515 static void audio_print_settings (audsettings_t *as)
 516 {
 517     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 518
 519     switch (as->fmt) {
 520     case AUD_FMT_S8:
 521         AUD_log (NULL, "S8");
 522         break;
 523     case AUD_FMT_U8:
 524         AUD_log (NULL, "U8");
 525         break;
 526     case AUD_FMT_S16:
 527         AUD_log (NULL, "S16");
 528         break;
 529     case AUD_FMT_U16:
 530         AUD_log (NULL, "U16");
 531         break;
 532     case AUD_FMT_S32:
 533         AUD_log (NULL, "S32");
 534         break;
 535     case AUD_FMT_U32:
 536         AUD_log (NULL, "U32");
 537         break;
 538     default:
 539         AUD_log (NULL, "invalid(%d)", as->fmt);
 540         break;
 541     }
 542
 543     AUD_log (NULL, " endianness=");
 544     switch (as->endianness) {
 545     case 0:
 546         AUD_log (NULL, "little");
 547         break;
 548     case 1:
 549         AUD_log (NULL, "big");
 550         break;
 551     default:
 552         AUD_log (NULL, "invalid");
 553         break;
 554     }
 555     AUD_log (NULL, "\n");
 556 }
 557
 558 static int audio_validate_settings (audsettings_t *as)
 559 {
 560     int invalid;
 561
 562     invalid = as->nchannels != 1 && as->nchannels != 2;
 563     invalid |= as->endianness != 0 && as->endianness != 1;
 564
 565     switch (as->fmt) {
 566     case AUD_FMT_S8:
 567     case AUD_FMT_U8:
 568     case AUD_FMT_S16:
 569     case AUD_FMT_U16:
 570     case AUD_FMT_S32:
 571     case AUD_FMT_U32:
 572         break;
 573     default:
 574         invalid = 1;
 575         break;
 576     }
 577
 578     invalid |= as->freq <= 0;
 579     return invalid ? -1 : 0;
 580 }
 581
 582 static int audio_pcm_info_eq (struct audio_pcm_info *info, audsettings_t *as)
 583 {
 584     int bits = 8, sign = 0;
 585
 586     switch (as->fmt) {
 587     case AUD_FMT_S8:
 588         sign = 1;
 589     case AUD_FMT_U8:
 590         break;
 591
 592     case AUD_FMT_S16:
 593         sign = 1;
 594     case AUD_FMT_U16:
 595         bits = 16;
 596         break;
 597
 598     case AUD_FMT_S32:
 599         sign = 1;
 600     case AUD_FMT_U32:
 601         bits = 32;
 602         break;
 603     }
 604     return info->freq == as->freq
 605         && info->nchannels == as->nchannels
 606         && info->sign == sign
 607         && info->bits == bits
 608         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 609 }
 610
 611 void audio_pcm_init_info (struct audio_pcm_info *info, audsettings_t *as)
 612 {
 613     int bits = 8, sign = 0, shift = 0;
 614
 615     switch (as->fmt) {
 616     case AUD_FMT_S8:
 617         sign = 1;
 618     case AUD_FMT_U8:
 619         break;
 620
 621     case AUD_FMT_S16:
 622         sign = 1;
 623     case AUD_FMT_U16:
 624         bits = 16;
 625         shift = 1;
 626         break;
 627
 628     case AUD_FMT_S32:
 629         sign = 1;
 630     case AUD_FMT_U32:
 631         bits = 32;
 632         shift = 2;
 633         break;
 634     }
 635
 636     info->freq = as->freq;
 637     info->bits = bits;
 638     info->sign = sign;
 639     info->nchannels = as->nchannels;
 640     info->shift = (as->nchannels == 2) + shift;
 641     info->align = (1 << info->shift) - 1;
 642     info->bytes_per_second = info->freq << info->shift;
 643     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 644 }
 645
 646 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 647 {
 648     if (!len) {
 649         return;
 650     }
 651
 652     if (info->sign) {
 653         memset (buf, 0x00, len << info->shift);
 654     }
 655     else {
 656         switch (info->bits) {
 657         case 8:
 658             memset (buf, 0x80, len << info->shift);
 659             break;
 660
 661         case 16:
 662             {
 663                 int i;
 664                 uint16_t *p = buf;
 665                 int shift = info->nchannels - 1;
 666                 short s = INT16_MAX;
 667
 668                 if (info->swap_endianness) {
 669                     s = bswap16 (s);
 670                 }
 671
 672                 for (i = 0; i < len << shift; i++) {
 673                     p[i] = s;
 674                 }
 675             }
 676             break;
 677
 678         case 32:
 679             {
 680                 int i;
 681                 uint32_t *p = buf;
 682                 int shift = info->nchannels - 1;
 683                 int32_t s = INT32_MAX;
 684
 685                 if (info->swap_endianness) {
 686                     s = bswap32 (s);
 687                 }
 688
 689                 for (i = 0; i < len << shift; i++) {
 690                     p[i] = s;
 691                 }
 692             }
 693             break;
 694
 695         default:
 696             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 697                      info->bits);
 698             break;
 699         }
 700     }
 701 }
 702
 703 /*
 704  * Capture
 705  */
 706 static void noop_conv (st_sample_t *dst, const void *src,
 707                        int samples, volume_t *vol)
 708 {
 709     (void) src;
 710     (void) dst;
 711     (void) samples;
 712     (void) vol;
 713 }
 714
 715 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 716     AudioState *s,
 717     audsettings_t *as
 718     )
 719 {
 720     CaptureVoiceOut *cap;
 721
 722     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 723         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 724             return cap;
 725         }
 726     }
 727     return NULL;
 728 }
 729
 730 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 731 {
 732     struct capture_callback *cb;
 733
 734 #ifdef DEBUG_CAPTURE
 735     dolog ("notification %d sent\n", cmd);
 736 #endif
 737     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 738         cb->ops.notify (cb->opaque, cmd);
 739     }
 740 }
 741
 742 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 743 {
 744     if (cap->hw.enabled != enabled) {
 745         audcnotification_e cmd;
 746         cap->hw.enabled = enabled;
 747         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 748         audio_notify_capture (cap, cmd);
 749     }
 750 }
 751
 752 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 753 {
 754     HWVoiceOut *hw = &cap->hw;
 755     SWVoiceOut *sw;
 756     int enabled = 0;
 757
 758     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 759         if (sw->active) {
 760             enabled = 1;
 761             break;
 762         }
 763     }
 764     audio_capture_maybe_changed (cap, enabled);
 765 }
 766
 767 static void audio_detach_capture (HWVoiceOut *hw)
 768 {
 769     SWVoiceCap *sc = hw->cap_head.lh_first;
 770
 771     while (sc) {
 772         SWVoiceCap *sc1 = sc->entries.le_next;
 773         SWVoiceOut *sw = &sc->sw;
 774         CaptureVoiceOut *cap = sc->cap;
 775         int was_active = sw->active;
 776
 777         if (sw->rate) {
 778             st_rate_stop (sw->rate);
 779             sw->rate = NULL;
 780         }
 781
 782         LIST_REMOVE (sw, entries);
 783         LIST_REMOVE (sc, entries);
 784         qemu_free (sc);
 785         if (was_active) {
 786             /* We have removed soft voice from the capture:
 787                this might have changed the overall status of the capture
 788                since this might have been the only active voice */
 789             audio_recalc_and_notify_capture (cap);
 790         }
 791         sc = sc1;
 792     }
 793 }
 794
 795 static int audio_attach_capture (AudioState *s, HWVoiceOut *hw)
 796 {
 797     CaptureVoiceOut *cap;
 798
 799     audio_detach_capture (hw);
 800     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 801         SWVoiceCap *sc;
 802         SWVoiceOut *sw;
 803         HWVoiceOut *hw_cap = &cap->hw;
 804
 805         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 806         if (!sc) {
 807             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 808                    sizeof (*sc));
 809             return -1;
 810         }
 811
 812         sc->cap = cap;
 813         sw = &sc->sw;
 814         sw->hw = hw_cap;
 815         sw->info = hw->info;
 816         sw->empty = 1;
 817         sw->active = hw->enabled;
 818         sw->conv = noop_conv;
 819         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 820         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 821         if (!sw->rate) {
 822             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 823             qemu_free (sw);
 824             return -1;
 825         }
 826         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 827         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 828 #ifdef DEBUG_CAPTURE
 829         asprintf (&sw->name, "for %p %d,%d,%d",
 830                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 831         dolog ("Added %s active = %d\n", sw->name, sw->active);
 832 #endif
 833         if (sw->active) {
 834             audio_capture_maybe_changed (cap, 1);
 835         }
 836     }
 837     return 0;
 838 }
 839
 840 /*
 841  * Hard voice (capture)
 842  */
 843 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 844 {
 845     SWVoiceIn *sw;
 846     int m = hw->total_samples_captured;
 847
 848     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 849         if (sw->active) {
 850             m = audio_MIN (m, sw->total_hw_samples_acquired);
 851         }
 852     }
 853     return m;
 854 }
 855
 856 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 857 {
 858     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 859     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 860         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 861         return 0;
 862     }
 863     return live;
 864 }
 865
 866 /*
 867  * Soft voice (capture)
 868  */
 869 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 870 {
 871     HWVoiceIn *hw = sw->hw;
 872     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 873     int rpos;
 874
 875     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 876         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 877         return 0;
 878     }
 879
 880     rpos = hw->wpos - live;
 881     if (rpos >= 0) {
 882         return rpos;
 883     }
 884     else {
 885         return hw->samples + rpos;
 886     }
 887 }
 888
 889 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 890 {
 891     HWVoiceIn *hw = sw->hw;
 892     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 893     st_sample_t *src, *dst = sw->buf;
 894
 895     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 896
 897     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 898     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 899         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 900         return 0;
 901     }
 902
 903     samples = size >> sw->info.shift;
 904     if (!live) {
 905         return 0;
 906     }
 907
 908     swlim = (live * sw->ratio) >> 32;
 909     swlim = audio_MIN (swlim, samples);
 910
 911     while (swlim) {
 912         src = hw->conv_buf + rpos;
 913         isamp = hw->wpos - rpos;
 914         /* XXX: <= ? */
 915         if (isamp <= 0) {
 916             isamp = hw->samples - rpos;
 917         }
 918
 919         if (!isamp) {
 920             break;
 921         }
 922         osamp = swlim;
 923
 924         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 925             dolog ("osamp=%d\n", osamp);
 926             return 0;
 927         }
 928
 929         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 930         swlim -= osamp;
 931         rpos = (rpos + isamp) % hw->samples;
 932         dst += osamp;
 933         ret += osamp;
 934         total += isamp;
 935     }
 936
 937     sw->clip (buf, sw->buf, ret);
 938     sw->total_hw_samples_acquired += total;
 939     return ret << sw->info.shift;
 940 }
 941
 942 /*
 943  * Hard voice (playback)
 944  */
 945 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 946 {
 947     SWVoiceOut *sw;
 948     int m = INT_MAX;
 949     int nb_live = 0;
 950
 951     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 952         if (sw->active || !sw->empty) {
 953             m = audio_MIN (m, sw->total_hw_samples_mixed);
 954             nb_live += 1;
 955         }
 956     }
 957
 958     *nb_livep = nb_live;
 959     return m;
 960 }
 961
 962 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 963 {
 964     int smin;
 965
 966     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 967
 968     if (!*nb_live) {
 969         return 0;
 970     }
 971     else {
 972         int live = smin;
 973
 974         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 975             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 976             return 0;
 977         }
 978         return live;
 979     }
 980 }
 981
 982 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 983 {
 984     int nb_live;
 985     int live;
 986
 987     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 988     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 989         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 990         return 0;
 991     }
 992     return live;
 993 }
 994
 995 /*
 996  * Soft voice (playback)
 997  */
 998 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 999 {
1000     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1001     int ret = 0, pos = 0, total = 0;
1002
1003     if (!sw) {
1004         return size;
1005     }
1006
1007     hwsamples = sw->hw->samples;
1008
1009     live = sw->total_hw_samples_mixed;
1010     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1011         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1012         return 0;
1013     }
1014
1015     if (live == hwsamples) {
1016 #ifdef DEBUG_OUT
1017         dolog ("%s is full %d\n", sw->name, live);
1018 #endif
1019         return 0;
1020     }
1021
1022     wpos = (sw->hw->rpos + live) % hwsamples;
1023     samples = size >> sw->info.shift;
1024
1025     dead = hwsamples - live;
1026     swlim = ((int64_t) dead << 32) / sw->ratio;
1027     swlim = audio_MIN (swlim, samples);
1028     if (swlim) {
1029         sw->conv (sw->buf, buf, swlim, &sw->vol);
1030     }
1031
1032     while (swlim) {
1033         dead = hwsamples - live;
1034         left = hwsamples - wpos;
1035         blck = audio_MIN (dead, left);
1036         if (!blck) {
1037             break;
1038         }
1039         isamp = swlim;
1040         osamp = blck;
1041         st_rate_flow_mix (
1042             sw->rate,
1043             sw->buf + pos,
1044             sw->hw->mix_buf + wpos,
1045             &isamp,
1046             &osamp
1047             );
1048         ret += isamp;
1049         swlim -= isamp;
1050         pos += isamp;
1051         live += osamp;
1052         wpos = (wpos + osamp) % hwsamples;
1053         total += osamp;
1054     }
1055
1056     sw->total_hw_samples_mixed += total;
1057     sw->empty = sw->total_hw_samples_mixed == 0;
1058
1059 #ifdef DEBUG_OUT
1060     dolog (
1061         "%s: write size %d ret %d total sw %d\n",
1062         SW_NAME (sw),
1063         size >> sw->info.shift,
1064         ret,
1065         sw->total_hw_samples_mixed
1066         );
1067 #endif
1068
1069     return ret << sw->info.shift;
1070 }
1071
1072 #ifdef DEBUG_AUDIO
1073 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1074 {
1075     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1076            cap, info->bits, info->sign, info->freq, info->nchannels);
1077 }
1078 #endif
1079
1080 #define DAC
1081 #include "audio_template.h"
1082 #undef DAC
1083 #include "audio_template.h"
1084
1085 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1086 {
1087     int bytes;
1088
1089     if (!sw) {
1090         /* XXX: Consider options */
1091         return size;
1092     }
1093
1094     if (!sw->hw->enabled) {
1095         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1096         return 0;
1097     }
1098
1099     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1100     return bytes;
1101 }
1102
1103 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1104 {
1105     int bytes;
1106
1107     if (!sw) {
1108         /* XXX: Consider options */
1109         return size;
1110     }
1111
1112     if (!sw->hw->enabled) {
1113         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1114         return 0;
1115     }
1116
1117     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1118     return bytes;
1119 }
1120
1121 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1122 {
1123     return sw->hw->samples << sw->hw->info.shift;
1124 }
1125
1126 void AUD_set_active_out (SWVoiceOut *sw, int on)
1127 {
1128     HWVoiceOut *hw;
1129
1130     if (!sw) {
1131         return;
1132     }
1133
1134     hw = sw->hw;
1135     if (sw->active != on) {
1136         SWVoiceOut *temp_sw;
1137         SWVoiceCap *sc;
1138
1139         if (on) {
1140             hw->pending_disable = 0;
1141             if (!hw->enabled) {
1142                 hw->enabled = 1;
1143                 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1144             }
1145         }
1146         else {
1147             if (hw->enabled) {
1148                 int nb_active = 0;
1149
1150                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1151                      temp_sw = temp_sw->entries.le_next) {
1152                     nb_active += temp_sw->active != 0;
1153                 }
1154
1155                 hw->pending_disable = nb_active == 1;
1156             }
1157         }
1158
1159         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1160             sc->sw.active = hw->enabled;
1161             if (hw->enabled) {
1162                 audio_capture_maybe_changed (sc->cap, 1);
1163             }
1164         }
1165         sw->active = on;
1166     }
1167 }
1168
1169 void AUD_set_active_in (SWVoiceIn *sw, int on)
1170 {
1171     HWVoiceIn *hw;
1172
1173     if (!sw) {
1174         return;
1175     }
1176
1177     hw = sw->hw;
1178     if (sw->active != on) {
1179         SWVoiceIn *temp_sw;
1180
1181         if (on) {
1182             if (!hw->enabled) {
1183                 hw->enabled = 1;
1184                 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
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             st_sample_t *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.hz,
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 < sizeof (drvtab) / sizeof (drvtab[0]); 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 < sizeof (drvtab) / sizeof (drvtab[0]); 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 {
1626     AudioState *s = opaque;
1627     HWVoiceOut *hwo = NULL;
1628     HWVoiceIn *hwi = NULL;
1629     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1630
1631     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1632         hwo->pcm_ops->ctl_out (hwo, op);
1633     }
1634
1635     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1636         hwi->pcm_ops->ctl_in (hwi, op);
1637     }
1638 }
1639
1640 static void audio_atexit (void)
1641 {
1642     AudioState *s = &glob_audio_state;
1643     HWVoiceOut *hwo = NULL;
1644     HWVoiceIn *hwi = NULL;
1645
1646     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1647         SWVoiceCap *sc;
1648
1649         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1650         hwo->pcm_ops->fini_out (hwo);
1651
1652         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1653             CaptureVoiceOut *cap = sc->cap;
1654             struct capture_callback *cb;
1655
1656             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1657                 cb->ops.destroy (cb->opaque);
1658             }
1659         }
1660     }
1661
1662     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1663         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1664         hwi->pcm_ops->fini_in (hwi);
1665     }
1666
1667     if (s->drv) {
1668         s->drv->fini (s->drv_opaque);
1669     }
1670 }
1671
1672 static void audio_save (QEMUFile *f, void *opaque)
1673 {
1674     (void) f;
1675     (void) opaque;
1676 }
1677
1678 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1679 {
1680     (void) f;
1681     (void) opaque;
1682
1683     if (version_id != 1) {
1684         return -EINVAL;
1685     }
1686
1687     return 0;
1688 }
1689
1690 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1691 {
1692     card->audio = s;
1693     card->name = qemu_strdup (name);
1694     memset (&card->entries, 0, sizeof (card->entries));
1695     LIST_INSERT_HEAD (&s->card_head, card, entries);
1696 }
1697
1698 void AUD_remove_card (QEMUSoundCard *card)
1699 {
1700     LIST_REMOVE (card, entries);
1701     card->audio = NULL;
1702     qemu_free (card->name);
1703 }
1704
1705 AudioState *AUD_init (void)
1706 {
1707     size_t i;
1708     int done = 0;
1709     const char *drvname;
1710     AudioState *s = &glob_audio_state;
1711
1712     LIST_INIT (&s->hw_head_out);
1713     LIST_INIT (&s->hw_head_in);
1714     LIST_INIT (&s->cap_head);
1715     atexit (audio_atexit);
1716
1717     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1718     if (!s->ts) {
1719         dolog ("Could not create audio timer\n");
1720         return NULL;
1721     }
1722
1723     audio_process_options ("AUDIO", audio_options);
1724
1725     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1726     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1727
1728     if (s->nb_hw_voices_out <= 0) {
1729         dolog ("Bogus number of playback voices %d, setting to 1\n",
1730                s->nb_hw_voices_out);
1731         s->nb_hw_voices_out = 1;
1732     }
1733
1734     if (s->nb_hw_voices_in <= 0) {
1735         dolog ("Bogus number of capture voices %d, setting to 0\n",
1736                s->nb_hw_voices_in);
1737         s->nb_hw_voices_in = 0;
1738     }
1739
1740     {
1741         int def;
1742         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1743     }
1744
1745     if (drvname) {
1746         int found = 0;
1747
1748         for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1749             if (!strcmp (drvname, drvtab[i]->name)) {
1750                 done = !audio_driver_init (s, drvtab[i]);
1751                 found = 1;
1752                 break;
1753             }
1754         }
1755
1756         if (!found) {
1757             dolog ("Unknown audio driver `%s'\n", drvname);
1758             dolog ("Run with -audio-help to list available drivers\n");
1759         }
1760     }
1761
1762     if (!done) {
1763         for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1764             if (drvtab[i]->can_be_default) {
1765                 done = !audio_driver_init (s, drvtab[i]);
1766             }
1767         }
1768     }
1769
1770     if (!done) {
1771         done = !audio_driver_init (s, &no_audio_driver);
1772         if (!done) {
1773             dolog ("Could not initialize audio subsystem\n");
1774         }
1775         else {
1776             dolog ("warning: Using timer based audio emulation\n");
1777         }
1778     }
1779
1780     if (done) {
1781         VMChangeStateEntry *e;
1782
1783         if (conf.period.hz <= 0) {
1784             if (conf.period.hz < 0) {
1785                 dolog ("warning: Timer period is negative - %d "
1786                        "treating as zero\n",
1787                        conf.period.hz);
1788             }
1789             conf.period.ticks = 1;
1790         }
1791         else {
1792             conf.period.ticks = ticks_per_sec / conf.period.hz;
1793         }
1794
1795         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1796         if (!e) {
1797             dolog ("warning: Could not register change state handler\n"
1798                    "(Audio can continue looping even after stopping the VM)\n");
1799         }
1800     }
1801     else {
1802         qemu_del_timer (s->ts);
1803         return NULL;
1804     }
1805
1806     LIST_INIT (&s->card_head);
1807     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1808     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1809     return s;
1810 }
1811
1812 CaptureVoiceOut *AUD_add_capture (
1813     AudioState *s,
1814     audsettings_t *as,
1815     struct audio_capture_ops *ops,
1816     void *cb_opaque
1817     )
1818 {
1819     CaptureVoiceOut *cap;
1820     struct capture_callback *cb;
1821
1822     if (!s) {
1823         /* XXX suppress */
1824         s = &glob_audio_state;
1825     }
1826
1827     if (audio_validate_settings (as)) {
1828         dolog ("Invalid settings were passed when trying to add capture\n");
1829         audio_print_settings (as);
1830         goto err0;
1831     }
1832
1833     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1834     if (!cb) {
1835         dolog ("Could not allocate capture callback information, size %zu\n",
1836                sizeof (*cb));
1837         goto err0;
1838     }
1839     cb->ops = *ops;
1840     cb->opaque = cb_opaque;
1841
1842     cap = audio_pcm_capture_find_specific (s, as);
1843     if (cap) {
1844         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1845         return cap;
1846     }
1847     else {
1848         HWVoiceOut *hw;
1849         CaptureVoiceOut *cap;
1850
1851         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1852         if (!cap) {
1853             dolog ("Could not allocate capture voice, size %zu\n",
1854                    sizeof (*cap));
1855             goto err1;
1856         }
1857
1858         hw = &cap->hw;
1859         LIST_INIT (&hw->sw_head);
1860         LIST_INIT (&cap->cb_head);
1861
1862         /* XXX find a more elegant way */
1863         hw->samples = 4096 * 4;
1864         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1865                                     sizeof (st_sample_t));
1866         if (!hw->mix_buf) {
1867             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1868                    hw->samples);
1869             goto err2;
1870         }
1871
1872         audio_pcm_init_info (&hw->info, as);
1873
1874         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1875         if (!cap->buf) {
1876             dolog ("Could not allocate capture buffer "
1877                    "(%d samples, each %d bytes)\n",
1878                    hw->samples, 1 << hw->info.shift);
1879             goto err3;
1880         }
1881
1882         hw->clip = mixeng_clip
1883             [hw->info.nchannels == 2]
1884             [hw->info.sign]
1885             [hw->info.swap_endianness]
1886             [audio_bits_to_index (hw->info.bits)];
1887
1888         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1889         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1890
1891         hw = NULL;
1892         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1893             audio_attach_capture (s, hw);
1894         }
1895         return cap;
1896
1897     err3:
1898         qemu_free (cap->hw.mix_buf);
1899     err2:
1900         qemu_free (cap);
1901     err1:
1902         qemu_free (cb);
1903     err0:
1904         return NULL;
1905     }
1906 }
1907
1908 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1909 {
1910     struct capture_callback *cb;
1911
1912     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1913         if (cb->opaque == cb_opaque) {
1914             cb->ops.destroy (cb_opaque);
1915             LIST_REMOVE (cb, entries);
1916             qemu_free (cb);
1917
1918             if (!cap->cb_head.lh_first) {
1919                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1920
1921                 while (sw) {
1922                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1923 #ifdef DEBUG_CAPTURE
1924                     dolog ("freeing %s\n", sw->name);
1925 #endif
1926
1927                     sw1 = sw->entries.le_next;
1928                     if (sw->rate) {
1929                         st_rate_stop (sw->rate);
1930                         sw->rate = NULL;
1931                     }
1932                     LIST_REMOVE (sw, entries);
1933                     LIST_REMOVE (sc, entries);
1934                     qemu_free (sc);
1935                     sw = sw1;
1936                 }
1937                 LIST_REMOVE (cap, entries);
1938                 qemu_free (cap);
1939             }
1940             return;
1941         }
1942     }
1943 }
1944
1945 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1946 {
1947     if (sw) {
1948         sw->vol.mute = mute;
1949         sw->vol.l = nominal_volume.l * lvol / 255;
1950         sw->vol.r = nominal_volume.r * rvol / 255;
1951     }
1952 }
1953
1954 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1955 {
1956     if (sw) {
1957         sw->vol.mute = mute;
1958         sw->vol.l = nominal_volume.l * lvol / 255;
1959         sw->vol.r = nominal_volume.r * rvol / 255;
1960     }
1961 }