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;
 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         pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 215         pstrcat (r, len + sizeof (qemu_prefix), s);
 216
 217         for (i = 0; i < len; ++i) {
 218             u[i] = qemu_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, optlen;
 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         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 462         optname = qemu_malloc (optlen);
 463         if (!optname) {
 464             dolog ("Could not allocate memory for option name `%s'\n",
 465                    opt->name);
 466             continue;
 467         }
 468
 469         pstrcpy (optname, optlen, qemu_prefix);
 470
 471         /* copy while upper-casing, including trailing zero */
 472         for (i = 0; i <= preflen; ++i) {
 473             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 474         }
 475         pstrcat (optname, optlen, "_");
 476         pstrcat (optname, optlen, opt->name);
 477
 478         def = 1;
 479         switch (opt->tag) {
 480         case AUD_OPT_BOOL:
 481         case AUD_OPT_INT:
 482             {
 483                 int *intp = opt->valp;
 484                 *intp = audio_get_conf_int (optname, *intp, &def);
 485             }
 486             break;
 487
 488         case AUD_OPT_FMT:
 489             {
 490                 audfmt_e *fmtp = opt->valp;
 491                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 492             }
 493             break;
 494
 495         case AUD_OPT_STR:
 496             {
 497                 const char **strp = opt->valp;
 498                 *strp = audio_get_conf_str (optname, *strp, &def);
 499             }
 500             break;
 501
 502         default:
 503             dolog ("Bad value tag for option `%s' - %d\n",
 504                    optname, opt->tag);
 505             break;
 506         }
 507
 508         if (!opt->overriddenp) {
 509             opt->overriddenp = &opt->overridden;
 510         }
 511         *opt->overriddenp = !def;
 512         qemu_free (optname);
 513     }
 514 }
 515
 516 static void audio_print_settings (struct audsettings *as)
 517 {
 518     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 519
 520     switch (as->fmt) {
 521     case AUD_FMT_S8:
 522         AUD_log (NULL, "S8");
 523         break;
 524     case AUD_FMT_U8:
 525         AUD_log (NULL, "U8");
 526         break;
 527     case AUD_FMT_S16:
 528         AUD_log (NULL, "S16");
 529         break;
 530     case AUD_FMT_U16:
 531         AUD_log (NULL, "U16");
 532         break;
 533     case AUD_FMT_S32:
 534         AUD_log (NULL, "S32");
 535         break;
 536     case AUD_FMT_U32:
 537         AUD_log (NULL, "U32");
 538         break;
 539     default:
 540         AUD_log (NULL, "invalid(%d)", as->fmt);
 541         break;
 542     }
 543
 544     AUD_log (NULL, " endianness=");
 545     switch (as->endianness) {
 546     case 0:
 547         AUD_log (NULL, "little");
 548         break;
 549     case 1:
 550         AUD_log (NULL, "big");
 551         break;
 552     default:
 553         AUD_log (NULL, "invalid");
 554         break;
 555     }
 556     AUD_log (NULL, "\n");
 557 }
 558
 559 static int audio_validate_settings (struct audsettings *as)
 560 {
 561     int invalid;
 562
 563     invalid = as->nchannels != 1 && as->nchannels != 2;
 564     invalid |= as->endianness != 0 && as->endianness != 1;
 565
 566     switch (as->fmt) {
 567     case AUD_FMT_S8:
 568     case AUD_FMT_U8:
 569     case AUD_FMT_S16:
 570     case AUD_FMT_U16:
 571     case AUD_FMT_S32:
 572     case AUD_FMT_U32:
 573         break;
 574     default:
 575         invalid = 1;
 576         break;
 577     }
 578
 579     invalid |= as->freq <= 0;
 580     return invalid ? -1 : 0;
 581 }
 582
 583 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 584 {
 585     int bits = 8, sign = 0;
 586
 587     switch (as->fmt) {
 588     case AUD_FMT_S8:
 589         sign = 1;
 590     case AUD_FMT_U8:
 591         break;
 592
 593     case AUD_FMT_S16:
 594         sign = 1;
 595     case AUD_FMT_U16:
 596         bits = 16;
 597         break;
 598
 599     case AUD_FMT_S32:
 600         sign = 1;
 601     case AUD_FMT_U32:
 602         bits = 32;
 603         break;
 604     }
 605     return info->freq == as->freq
 606         && info->nchannels == as->nchannels
 607         && info->sign == sign
 608         && info->bits == bits
 609         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 610 }
 611
 612 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 613 {
 614     int bits = 8, sign = 0, shift = 0;
 615
 616     switch (as->fmt) {
 617     case AUD_FMT_S8:
 618         sign = 1;
 619     case AUD_FMT_U8:
 620         break;
 621
 622     case AUD_FMT_S16:
 623         sign = 1;
 624     case AUD_FMT_U16:
 625         bits = 16;
 626         shift = 1;
 627         break;
 628
 629     case AUD_FMT_S32:
 630         sign = 1;
 631     case AUD_FMT_U32:
 632         bits = 32;
 633         shift = 2;
 634         break;
 635     }
 636
 637     info->freq = as->freq;
 638     info->bits = bits;
 639     info->sign = sign;
 640     info->nchannels = as->nchannels;
 641     info->shift = (as->nchannels == 2) + shift;
 642     info->align = (1 << info->shift) - 1;
 643     info->bytes_per_second = info->freq << info->shift;
 644     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 645 }
 646
 647 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 648 {
 649     if (!len) {
 650         return;
 651     }
 652
 653     if (info->sign) {
 654         memset (buf, 0x00, len << info->shift);
 655     }
 656     else {
 657         switch (info->bits) {
 658         case 8:
 659             memset (buf, 0x80, len << info->shift);
 660             break;
 661
 662         case 16:
 663             {
 664                 int i;
 665                 uint16_t *p = buf;
 666                 int shift = info->nchannels - 1;
 667                 short s = INT16_MAX;
 668
 669                 if (info->swap_endianness) {
 670                     s = bswap16 (s);
 671                 }
 672
 673                 for (i = 0; i < len << shift; i++) {
 674                     p[i] = s;
 675                 }
 676             }
 677             break;
 678
 679         case 32:
 680             {
 681                 int i;
 682                 uint32_t *p = buf;
 683                 int shift = info->nchannels - 1;
 684                 int32_t s = INT32_MAX;
 685
 686                 if (info->swap_endianness) {
 687                     s = bswap32 (s);
 688                 }
 689
 690                 for (i = 0; i < len << shift; i++) {
 691                     p[i] = s;
 692                 }
 693             }
 694             break;
 695
 696         default:
 697             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 698                      info->bits);
 699             break;
 700         }
 701     }
 702 }
 703
 704 /*
 705  * Capture
 706  */
 707 static void noop_conv (struct st_sample *dst, const void *src,
 708                        int samples, struct mixeng_volume *vol)
 709 {
 710     (void) src;
 711     (void) dst;
 712     (void) samples;
 713     (void) vol;
 714 }
 715
 716 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 717     AudioState *s,
 718     struct audsettings *as
 719     )
 720 {
 721     CaptureVoiceOut *cap;
 722
 723     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 724         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 725             return cap;
 726         }
 727     }
 728     return NULL;
 729 }
 730
 731 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 732 {
 733     struct capture_callback *cb;
 734
 735 #ifdef DEBUG_CAPTURE
 736     dolog ("notification %d sent\n", cmd);
 737 #endif
 738     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 739         cb->ops.notify (cb->opaque, cmd);
 740     }
 741 }
 742
 743 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 744 {
 745     if (cap->hw.enabled != enabled) {
 746         audcnotification_e cmd;
 747         cap->hw.enabled = enabled;
 748         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 749         audio_notify_capture (cap, cmd);
 750     }
 751 }
 752
 753 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 754 {
 755     HWVoiceOut *hw = &cap->hw;
 756     SWVoiceOut *sw;
 757     int enabled = 0;
 758
 759     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 760         if (sw->active) {
 761             enabled = 1;
 762             break;
 763         }
 764     }
 765     audio_capture_maybe_changed (cap, enabled);
 766 }
 767
 768 static void audio_detach_capture (HWVoiceOut *hw)
 769 {
 770     SWVoiceCap *sc = hw->cap_head.lh_first;
 771
 772     while (sc) {
 773         SWVoiceCap *sc1 = sc->entries.le_next;
 774         SWVoiceOut *sw = &sc->sw;
 775         CaptureVoiceOut *cap = sc->cap;
 776         int was_active = sw->active;
 777
 778         if (sw->rate) {
 779             st_rate_stop (sw->rate);
 780             sw->rate = NULL;
 781         }
 782
 783         LIST_REMOVE (sw, entries);
 784         LIST_REMOVE (sc, entries);
 785         qemu_free (sc);
 786         if (was_active) {
 787             /* We have removed soft voice from the capture:
 788                this might have changed the overall status of the capture
 789                since this might have been the only active voice */
 790             audio_recalc_and_notify_capture (cap);
 791         }
 792         sc = sc1;
 793     }
 794 }
 795
 796 static int audio_attach_capture (AudioState *s, HWVoiceOut *hw)
 797 {
 798     CaptureVoiceOut *cap;
 799
 800     audio_detach_capture (hw);
 801     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 802         SWVoiceCap *sc;
 803         SWVoiceOut *sw;
 804         HWVoiceOut *hw_cap = &cap->hw;
 805
 806         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 807         if (!sc) {
 808             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 809                    sizeof (*sc));
 810             return -1;
 811         }
 812
 813         sc->cap = cap;
 814         sw = &sc->sw;
 815         sw->hw = hw_cap;
 816         sw->info = hw->info;
 817         sw->empty = 1;
 818         sw->active = hw->enabled;
 819         sw->conv = noop_conv;
 820         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 821         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 822         if (!sw->rate) {
 823             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 824             qemu_free (sw);
 825             return -1;
 826         }
 827         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 828         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 829 #ifdef DEBUG_CAPTURE
 830         asprintf (&sw->name, "for %p %d,%d,%d",
 831                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 832         dolog ("Added %s active = %d\n", sw->name, sw->active);
 833 #endif
 834         if (sw->active) {
 835             audio_capture_maybe_changed (cap, 1);
 836         }
 837     }
 838     return 0;
 839 }
 840
 841 /*
 842  * Hard voice (capture)
 843  */
 844 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 845 {
 846     SWVoiceIn *sw;
 847     int m = hw->total_samples_captured;
 848
 849     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 850         if (sw->active) {
 851             m = audio_MIN (m, sw->total_hw_samples_acquired);
 852         }
 853     }
 854     return m;
 855 }
 856
 857 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 858 {
 859     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 860     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 861         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 862         return 0;
 863     }
 864     return live;
 865 }
 866
 867 /*
 868  * Soft voice (capture)
 869  */
 870 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 871 {
 872     HWVoiceIn *hw = sw->hw;
 873     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 874     int rpos;
 875
 876     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 877         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 878         return 0;
 879     }
 880
 881     rpos = hw->wpos - live;
 882     if (rpos >= 0) {
 883         return rpos;
 884     }
 885     else {
 886         return hw->samples + rpos;
 887     }
 888 }
 889
 890 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 891 {
 892     HWVoiceIn *hw = sw->hw;
 893     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 894     struct st_sample *src, *dst = sw->buf;
 895
 896     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 897
 898     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 899     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 900         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 901         return 0;
 902     }
 903
 904     samples = size >> sw->info.shift;
 905     if (!live) {
 906         return 0;
 907     }
 908
 909     swlim = (live * sw->ratio) >> 32;
 910     swlim = audio_MIN (swlim, samples);
 911
 912     while (swlim) {
 913         src = hw->conv_buf + rpos;
 914         isamp = hw->wpos - rpos;
 915         /* XXX: <= ? */
 916         if (isamp <= 0) {
 917             isamp = hw->samples - rpos;
 918         }
 919
 920         if (!isamp) {
 921             break;
 922         }
 923         osamp = swlim;
 924
 925         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 926             dolog ("osamp=%d\n", osamp);
 927             return 0;
 928         }
 929
 930         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 931         swlim -= osamp;
 932         rpos = (rpos + isamp) % hw->samples;
 933         dst += osamp;
 934         ret += osamp;
 935         total += isamp;
 936     }
 937
 938     sw->clip (buf, sw->buf, ret);
 939     sw->total_hw_samples_acquired += total;
 940     return ret << sw->info.shift;
 941 }
 942
 943 /*
 944  * Hard voice (playback)
 945  */
 946 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 947 {
 948     SWVoiceOut *sw;
 949     int m = INT_MAX;
 950     int nb_live = 0;
 951
 952     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 953         if (sw->active || !sw->empty) {
 954             m = audio_MIN (m, sw->total_hw_samples_mixed);
 955             nb_live += 1;
 956         }
 957     }
 958
 959     *nb_livep = nb_live;
 960     return m;
 961 }
 962
 963 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 964 {
 965     int smin;
 966
 967     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 968
 969     if (!*nb_live) {
 970         return 0;
 971     }
 972     else {
 973         int live = smin;
 974
 975         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 976             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 977             return 0;
 978         }
 979         return live;
 980     }
 981 }
 982
 983 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 984 {
 985     int nb_live;
 986     int live;
 987
 988     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 989     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 990         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 991         return 0;
 992     }
 993     return live;
 994 }
 995
 996 /*
 997  * Soft voice (playback)
 998  */
 999 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1000 {
1001     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1002     int ret = 0, pos = 0, total = 0;
1003
1004     if (!sw) {
1005         return size;
1006     }
1007
1008     hwsamples = sw->hw->samples;
1009
1010     live = sw->total_hw_samples_mixed;
1011     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1012         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1013         return 0;
1014     }
1015
1016     if (live == hwsamples) {
1017 #ifdef DEBUG_OUT
1018         dolog ("%s is full %d\n", sw->name, live);
1019 #endif
1020         return 0;
1021     }
1022
1023     wpos = (sw->hw->rpos + live) % hwsamples;
1024     samples = size >> sw->info.shift;
1025
1026     dead = hwsamples - live;
1027     swlim = ((int64_t) dead << 32) / sw->ratio;
1028     swlim = audio_MIN (swlim, samples);
1029     if (swlim) {
1030         sw->conv (sw->buf, buf, swlim, &sw->vol);
1031     }
1032
1033     while (swlim) {
1034         dead = hwsamples - live;
1035         left = hwsamples - wpos;
1036         blck = audio_MIN (dead, left);
1037         if (!blck) {
1038             break;
1039         }
1040         isamp = swlim;
1041         osamp = blck;
1042         st_rate_flow_mix (
1043             sw->rate,
1044             sw->buf + pos,
1045             sw->hw->mix_buf + wpos,
1046             &isamp,
1047             &osamp
1048             );
1049         ret += isamp;
1050         swlim -= isamp;
1051         pos += isamp;
1052         live += osamp;
1053         wpos = (wpos + osamp) % hwsamples;
1054         total += osamp;
1055     }
1056
1057     sw->total_hw_samples_mixed += total;
1058     sw->empty = sw->total_hw_samples_mixed == 0;
1059
1060 #ifdef DEBUG_OUT
1061     dolog (
1062         "%s: write size %d ret %d total sw %d\n",
1063         SW_NAME (sw),
1064         size >> sw->info.shift,
1065         ret,
1066         sw->total_hw_samples_mixed
1067         );
1068 #endif
1069
1070     return ret << sw->info.shift;
1071 }
1072
1073 #ifdef DEBUG_AUDIO
1074 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1075 {
1076     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1077            cap, info->bits, info->sign, info->freq, info->nchannels);
1078 }
1079 #endif
1080
1081 #define DAC
1082 #include "audio_template.h"
1083 #undef DAC
1084 #include "audio_template.h"
1085
1086 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1087 {
1088     int bytes;
1089
1090     if (!sw) {
1091         /* XXX: Consider options */
1092         return size;
1093     }
1094
1095     if (!sw->hw->enabled) {
1096         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1097         return 0;
1098     }
1099
1100     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1101     return bytes;
1102 }
1103
1104 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1105 {
1106     int bytes;
1107
1108     if (!sw) {
1109         /* XXX: Consider options */
1110         return size;
1111     }
1112
1113     if (!sw->hw->enabled) {
1114         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1115         return 0;
1116     }
1117
1118     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1119     return bytes;
1120 }
1121
1122 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1123 {
1124     return sw->hw->samples << sw->hw->info.shift;
1125 }
1126
1127 void AUD_set_active_out (SWVoiceOut *sw, int on)
1128 {
1129     HWVoiceOut *hw;
1130
1131     if (!sw) {
1132         return;
1133     }
1134
1135     hw = sw->hw;
1136     if (sw->active != on) {
1137         SWVoiceOut *temp_sw;
1138         SWVoiceCap *sc;
1139
1140         if (on) {
1141             hw->pending_disable = 0;
1142             if (!hw->enabled) {
1143                 hw->enabled = 1;
1144                 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1145             }
1146         }
1147         else {
1148             if (hw->enabled) {
1149                 int nb_active = 0;
1150
1151                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1152                      temp_sw = temp_sw->entries.le_next) {
1153                     nb_active += temp_sw->active != 0;
1154                 }
1155
1156                 hw->pending_disable = nb_active == 1;
1157             }
1158         }
1159
1160         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1161             sc->sw.active = hw->enabled;
1162             if (hw->enabled) {
1163                 audio_capture_maybe_changed (sc->cap, 1);
1164             }
1165         }
1166         sw->active = on;
1167     }
1168 }
1169
1170 void AUD_set_active_in (SWVoiceIn *sw, int on)
1171 {
1172     HWVoiceIn *hw;
1173
1174     if (!sw) {
1175         return;
1176     }
1177
1178     hw = sw->hw;
1179     if (sw->active != on) {
1180         SWVoiceIn *temp_sw;
1181
1182         if (on) {
1183             if (!hw->enabled) {
1184                 hw->enabled = 1;
1185                 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1186             }
1187             sw->total_hw_samples_acquired = hw->total_samples_captured;
1188         }
1189         else {
1190             if (hw->enabled) {
1191                 int nb_active = 0;
1192
1193                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1194                      temp_sw = temp_sw->entries.le_next) {
1195                     nb_active += temp_sw->active != 0;
1196                 }
1197
1198                 if (nb_active == 1) {
1199                     hw->enabled = 0;
1200                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1201                 }
1202             }
1203         }
1204         sw->active = on;
1205     }
1206 }
1207
1208 static int audio_get_avail (SWVoiceIn *sw)
1209 {
1210     int live;
1211
1212     if (!sw) {
1213         return 0;
1214     }
1215
1216     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1217     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1218         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1219         return 0;
1220     }
1221
1222     ldebug (
1223         "%s: get_avail live %d ret %" PRId64 "\n",
1224         SW_NAME (sw),
1225         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1226         );
1227
1228     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1229 }
1230
1231 static int audio_get_free (SWVoiceOut *sw)
1232 {
1233     int live, dead;
1234
1235     if (!sw) {
1236         return 0;
1237     }
1238
1239     live = sw->total_hw_samples_mixed;
1240
1241     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1242         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1243         return 0;
1244     }
1245
1246     dead = sw->hw->samples - live;
1247
1248 #ifdef DEBUG_OUT
1249     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1250            SW_NAME (sw),
1251            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1252 #endif
1253
1254     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1255 }
1256
1257 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1258 {
1259     int n;
1260
1261     if (hw->enabled) {
1262         SWVoiceCap *sc;
1263
1264         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1265             SWVoiceOut *sw = &sc->sw;
1266             int rpos2 = rpos;
1267
1268             n = samples;
1269             while (n) {
1270                 int till_end_of_hw = hw->samples - rpos2;
1271                 int to_write = audio_MIN (till_end_of_hw, n);
1272                 int bytes = to_write << hw->info.shift;
1273                 int written;
1274
1275                 sw->buf = hw->mix_buf + rpos2;
1276                 written = audio_pcm_sw_write (sw, NULL, bytes);
1277                 if (written - bytes) {
1278                     dolog ("Could not mix %d bytes into a capture "
1279                            "buffer, mixed %d\n",
1280                            bytes, written);
1281                     break;
1282                 }
1283                 n -= to_write;
1284                 rpos2 = (rpos2 + to_write) % hw->samples;
1285             }
1286         }
1287     }
1288
1289     n = audio_MIN (samples, hw->samples - rpos);
1290     mixeng_clear (hw->mix_buf + rpos, n);
1291     mixeng_clear (hw->mix_buf, samples - n);
1292 }
1293
1294 static void audio_run_out (AudioState *s)
1295 {
1296     HWVoiceOut *hw = NULL;
1297     SWVoiceOut *sw;
1298
1299     while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1300         int played;
1301         int live, free, nb_live, cleanup_required, prev_rpos;
1302
1303         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1304         if (!nb_live) {
1305             live = 0;
1306         }
1307
1308         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1309             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1310             continue;
1311         }
1312
1313         if (hw->pending_disable && !nb_live) {
1314             SWVoiceCap *sc;
1315 #ifdef DEBUG_OUT
1316             dolog ("Disabling voice\n");
1317 #endif
1318             hw->enabled = 0;
1319             hw->pending_disable = 0;
1320             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1321             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1322                 sc->sw.active = 0;
1323                 audio_recalc_and_notify_capture (sc->cap);
1324             }
1325             continue;
1326         }
1327
1328         if (!live) {
1329             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1330                 if (sw->active) {
1331                     free = audio_get_free (sw);
1332                     if (free > 0) {
1333                         sw->callback.fn (sw->callback.opaque, free);
1334                     }
1335                 }
1336             }
1337             continue;
1338         }
1339
1340         prev_rpos = hw->rpos;
1341         played = hw->pcm_ops->run_out (hw);
1342         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1343             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1344                    hw->rpos, hw->samples, played);
1345             hw->rpos = 0;
1346         }
1347
1348 #ifdef DEBUG_OUT
1349         dolog ("played=%d\n", played);
1350 #endif
1351
1352         if (played) {
1353             hw->ts_helper += played;
1354             audio_capture_mix_and_clear (hw, prev_rpos, played);
1355         }
1356
1357         cleanup_required = 0;
1358         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1359             if (!sw->active && sw->empty) {
1360                 continue;
1361             }
1362
1363             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1364                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1365                        played, sw->total_hw_samples_mixed);
1366                 played = sw->total_hw_samples_mixed;
1367             }
1368
1369             sw->total_hw_samples_mixed -= played;
1370
1371             if (!sw->total_hw_samples_mixed) {
1372                 sw->empty = 1;
1373                 cleanup_required |= !sw->active && !sw->callback.fn;
1374             }
1375
1376             if (sw->active) {
1377                 free = audio_get_free (sw);
1378                 if (free > 0) {
1379                     sw->callback.fn (sw->callback.opaque, free);
1380                 }
1381             }
1382         }
1383
1384         if (cleanup_required) {
1385             SWVoiceOut *sw1;
1386
1387             sw = hw->sw_head.lh_first;
1388             while (sw) {
1389                 sw1 = sw->entries.le_next;
1390                 if (!sw->active && !sw->callback.fn) {
1391 #ifdef DEBUG_PLIVE
1392                     dolog ("Finishing with old voice\n");
1393 #endif
1394                     audio_close_out (s, sw);
1395                 }
1396                 sw = sw1;
1397             }
1398         }
1399     }
1400 }
1401
1402 static void audio_run_in (AudioState *s)
1403 {
1404     HWVoiceIn *hw = NULL;
1405
1406     while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1407         SWVoiceIn *sw;
1408         int captured, min;
1409
1410         captured = hw->pcm_ops->run_in (hw);
1411
1412         min = audio_pcm_hw_find_min_in (hw);
1413         hw->total_samples_captured += captured - min;
1414         hw->ts_helper += captured;
1415
1416         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1417             sw->total_hw_samples_acquired -= min;
1418
1419             if (sw->active) {
1420                 int avail;
1421
1422                 avail = audio_get_avail (sw);
1423                 if (avail > 0) {
1424                     sw->callback.fn (sw->callback.opaque, avail);
1425                 }
1426             }
1427         }
1428     }
1429 }
1430
1431 static void audio_run_capture (AudioState *s)
1432 {
1433     CaptureVoiceOut *cap;
1434
1435     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1436         int live, rpos, captured;
1437         HWVoiceOut *hw = &cap->hw;
1438         SWVoiceOut *sw;
1439
1440         captured = live = audio_pcm_hw_get_live_out (hw);
1441         rpos = hw->rpos;
1442         while (live) {
1443             int left = hw->samples - rpos;
1444             int to_capture = audio_MIN (live, left);
1445             struct st_sample *src;
1446             struct capture_callback *cb;
1447
1448             src = hw->mix_buf + rpos;
1449             hw->clip (cap->buf, src, to_capture);
1450             mixeng_clear (src, to_capture);
1451
1452             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1453                 cb->ops.capture (cb->opaque, cap->buf,
1454                                  to_capture << hw->info.shift);
1455             }
1456             rpos = (rpos + to_capture) % hw->samples;
1457             live -= to_capture;
1458         }
1459         hw->rpos = rpos;
1460
1461         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1462             if (!sw->active && sw->empty) {
1463                 continue;
1464             }
1465
1466             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1467                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1468                        captured, sw->total_hw_samples_mixed);
1469                 captured = sw->total_hw_samples_mixed;
1470             }
1471
1472             sw->total_hw_samples_mixed -= captured;
1473             sw->empty = sw->total_hw_samples_mixed == 0;
1474         }
1475     }
1476 }
1477
1478 static void audio_timer (void *opaque)
1479 {
1480     AudioState *s = opaque;
1481
1482     audio_run_out (s);
1483     audio_run_in (s);
1484     audio_run_capture (s);
1485
1486     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1487 }
1488
1489 static struct audio_option audio_options[] = {
1490     /* DAC */
1491     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1492      "Use fixed settings for host DAC", NULL, 0},
1493
1494     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1495      "Frequency for fixed host DAC", NULL, 0},
1496
1497     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1498      "Format for fixed host DAC", NULL, 0},
1499
1500     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1501      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1502
1503     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1504      "Number of voices for DAC", NULL, 0},
1505
1506     /* ADC */
1507     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1508      "Use fixed settings for host ADC", NULL, 0},
1509
1510     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1511      "Frequency for fixed host ADC", NULL, 0},
1512
1513     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1514      "Format for fixed host ADC", NULL, 0},
1515
1516     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1517      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1518
1519     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1520      "Number of voices for ADC", NULL, 0},
1521
1522     /* Misc */
1523     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hertz,
1524      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1525
1526     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1527      "(undocumented)", NULL, 0},
1528
1529     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1530      "print logging messages to monitor instead of stderr", NULL, 0},
1531
1532     {NULL, 0, NULL, NULL, NULL, 0}
1533 };
1534
1535 static void audio_pp_nb_voices (const char *typ, int nb)
1536 {
1537     switch (nb) {
1538     case 0:
1539         printf ("Does not support %s\n", typ);
1540         break;
1541     case 1:
1542         printf ("One %s voice\n", typ);
1543         break;
1544     case INT_MAX:
1545         printf ("Theoretically supports many %s voices\n", typ);
1546         break;
1547     default:
1548         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1549         break;
1550     }
1551
1552 }
1553
1554 void AUD_help (void)
1555 {
1556     size_t i;
1557
1558     audio_process_options ("AUDIO", audio_options);
1559     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1560         struct audio_driver *d = drvtab[i];
1561         if (d->options) {
1562             audio_process_options (d->name, d->options);
1563         }
1564     }
1565
1566     printf ("Audio options:\n");
1567     audio_print_options ("AUDIO", audio_options);
1568     printf ("\n");
1569
1570     printf ("Available drivers:\n");
1571
1572     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1573         struct audio_driver *d = drvtab[i];
1574
1575         printf ("Name: %s\n", d->name);
1576         printf ("Description: %s\n", d->descr);
1577
1578         audio_pp_nb_voices ("playback", d->max_voices_out);
1579         audio_pp_nb_voices ("capture", d->max_voices_in);
1580
1581         if (d->options) {
1582             printf ("Options:\n");
1583             audio_print_options (d->name, d->options);
1584         }
1585         else {
1586             printf ("No options\n");
1587         }
1588         printf ("\n");
1589     }
1590
1591     printf (
1592         "Options are settable through environment variables.\n"
1593         "Example:\n"
1594 #ifdef _WIN32
1595         "  set QEMU_AUDIO_DRV=wav\n"
1596         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1597 #else
1598         "  export QEMU_AUDIO_DRV=wav\n"
1599         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1600         "(for csh replace export with setenv in the above)\n"
1601 #endif
1602         "  qemu ...\n\n"
1603         );
1604 }
1605
1606 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1607 {
1608     if (drv->options) {
1609         audio_process_options (drv->name, drv->options);
1610     }
1611     s->drv_opaque = drv->init ();
1612
1613     if (s->drv_opaque) {
1614         audio_init_nb_voices_out (s, drv);
1615         audio_init_nb_voices_in (s, drv);
1616         s->drv = drv;
1617         return 0;
1618     }
1619     else {
1620         dolog ("Could not init `%s' audio driver\n", drv->name);
1621         return -1;
1622     }
1623 }
1624
1625 static void audio_vm_change_state_handler (void *opaque, int running)
1626 {
1627     AudioState *s = opaque;
1628     HWVoiceOut *hwo = NULL;
1629     HWVoiceIn *hwi = NULL;
1630     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1631
1632     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1633         hwo->pcm_ops->ctl_out (hwo, op);
1634     }
1635
1636     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1637         hwi->pcm_ops->ctl_in (hwi, op);
1638     }
1639 }
1640
1641 static void audio_atexit (void)
1642 {
1643     AudioState *s = &glob_audio_state;
1644     HWVoiceOut *hwo = NULL;
1645     HWVoiceIn *hwi = NULL;
1646
1647     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1648         SWVoiceCap *sc;
1649
1650         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1651         hwo->pcm_ops->fini_out (hwo);
1652
1653         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1654             CaptureVoiceOut *cap = sc->cap;
1655             struct capture_callback *cb;
1656
1657             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1658                 cb->ops.destroy (cb->opaque);
1659             }
1660         }
1661     }
1662
1663     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1664         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1665         hwi->pcm_ops->fini_in (hwi);
1666     }
1667
1668     if (s->drv) {
1669         s->drv->fini (s->drv_opaque);
1670     }
1671 }
1672
1673 static void audio_save (QEMUFile *f, void *opaque)
1674 {
1675     (void) f;
1676     (void) opaque;
1677 }
1678
1679 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1680 {
1681     (void) f;
1682     (void) opaque;
1683
1684     if (version_id != 1) {
1685         return -EINVAL;
1686     }
1687
1688     return 0;
1689 }
1690
1691 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1692 {
1693     card->audio = s;
1694     card->name = qemu_strdup (name);
1695     memset (&card->entries, 0, sizeof (card->entries));
1696     LIST_INSERT_HEAD (&s->card_head, card, entries);
1697 }
1698
1699 void AUD_remove_card (QEMUSoundCard *card)
1700 {
1701     LIST_REMOVE (card, entries);
1702     card->audio = NULL;
1703     qemu_free (card->name);
1704 }
1705
1706 AudioState *AUD_init (void)
1707 {
1708     size_t i;
1709     int done = 0;
1710     const char *drvname;
1711     AudioState *s = &glob_audio_state;
1712
1713     LIST_INIT (&s->hw_head_out);
1714     LIST_INIT (&s->hw_head_in);
1715     LIST_INIT (&s->cap_head);
1716     atexit (audio_atexit);
1717
1718     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1719     if (!s->ts) {
1720         dolog ("Could not create audio timer\n");
1721         return NULL;
1722     }
1723
1724     audio_process_options ("AUDIO", audio_options);
1725
1726     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1727     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1728
1729     if (s->nb_hw_voices_out <= 0) {
1730         dolog ("Bogus number of playback voices %d, setting to 1\n",
1731                s->nb_hw_voices_out);
1732         s->nb_hw_voices_out = 1;
1733     }
1734
1735     if (s->nb_hw_voices_in <= 0) {
1736         dolog ("Bogus number of capture voices %d, setting to 0\n",
1737                s->nb_hw_voices_in);
1738         s->nb_hw_voices_in = 0;
1739     }
1740
1741     {
1742         int def;
1743         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1744     }
1745
1746     if (drvname) {
1747         int found = 0;
1748
1749         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1750             if (!strcmp (drvname, drvtab[i]->name)) {
1751                 done = !audio_driver_init (s, drvtab[i]);
1752                 found = 1;
1753                 break;
1754             }
1755         }
1756
1757         if (!found) {
1758             dolog ("Unknown audio driver `%s'\n", drvname);
1759             dolog ("Run with -audio-help to list available drivers\n");
1760         }
1761     }
1762
1763     if (!done) {
1764         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1765             if (drvtab[i]->can_be_default) {
1766                 done = !audio_driver_init (s, drvtab[i]);
1767             }
1768         }
1769     }
1770
1771     if (!done) {
1772         done = !audio_driver_init (s, &no_audio_driver);
1773         if (!done) {
1774             dolog ("Could not initialize audio subsystem\n");
1775         }
1776         else {
1777             dolog ("warning: Using timer based audio emulation\n");
1778         }
1779     }
1780
1781     if (done) {
1782         VMChangeStateEntry *e;
1783
1784         if (conf.period.hertz <= 0) {
1785             if (conf.period.hertz < 0) {
1786                 dolog ("warning: Timer period is negative - %d "
1787                        "treating as zero\n",
1788                        conf.period.hertz);
1789             }
1790             conf.period.ticks = 1;
1791         }
1792         else {
1793             conf.period.ticks = ticks_per_sec / conf.period.hertz;
1794         }
1795
1796         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1797         if (!e) {
1798             dolog ("warning: Could not register change state handler\n"
1799                    "(Audio can continue looping even after stopping the VM)\n");
1800         }
1801     }
1802     else {
1803         qemu_del_timer (s->ts);
1804         return NULL;
1805     }
1806
1807     LIST_INIT (&s->card_head);
1808     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1809     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1810     return s;
1811 }
1812
1813 CaptureVoiceOut *AUD_add_capture (
1814     AudioState *s,
1815     struct audsettings *as,
1816     struct audio_capture_ops *ops,
1817     void *cb_opaque
1818     )
1819 {
1820     CaptureVoiceOut *cap;
1821     struct capture_callback *cb;
1822
1823     if (!s) {
1824         /* XXX suppress */
1825         s = &glob_audio_state;
1826     }
1827
1828     if (audio_validate_settings (as)) {
1829         dolog ("Invalid settings were passed when trying to add capture\n");
1830         audio_print_settings (as);
1831         goto err0;
1832     }
1833
1834     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1835     if (!cb) {
1836         dolog ("Could not allocate capture callback information, size %zu\n",
1837                sizeof (*cb));
1838         goto err0;
1839     }
1840     cb->ops = *ops;
1841     cb->opaque = cb_opaque;
1842
1843     cap = audio_pcm_capture_find_specific (s, as);
1844     if (cap) {
1845         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1846         return cap;
1847     }
1848     else {
1849         HWVoiceOut *hw;
1850         CaptureVoiceOut *cap;
1851
1852         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1853         if (!cap) {
1854             dolog ("Could not allocate capture voice, size %zu\n",
1855                    sizeof (*cap));
1856             goto err1;
1857         }
1858
1859         hw = &cap->hw;
1860         LIST_INIT (&hw->sw_head);
1861         LIST_INIT (&cap->cb_head);
1862
1863         /* XXX find a more elegant way */
1864         hw->samples = 4096 * 4;
1865         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1866                                     sizeof (struct st_sample));
1867         if (!hw->mix_buf) {
1868             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1869                    hw->samples);
1870             goto err2;
1871         }
1872
1873         audio_pcm_init_info (&hw->info, as);
1874
1875         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1876         if (!cap->buf) {
1877             dolog ("Could not allocate capture buffer "
1878                    "(%d samples, each %d bytes)\n",
1879                    hw->samples, 1 << hw->info.shift);
1880             goto err3;
1881         }
1882
1883         hw->clip = mixeng_clip
1884             [hw->info.nchannels == 2]
1885             [hw->info.sign]
1886             [hw->info.swap_endianness]
1887             [audio_bits_to_index (hw->info.bits)];
1888
1889         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1890         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1891
1892         hw = NULL;
1893         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1894             audio_attach_capture (s, hw);
1895         }
1896         return cap;
1897
1898     err3:
1899         qemu_free (cap->hw.mix_buf);
1900     err2:
1901         qemu_free (cap);
1902     err1:
1903         qemu_free (cb);
1904     err0:
1905         return NULL;
1906     }
1907 }
1908
1909 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1910 {
1911     struct capture_callback *cb;
1912
1913     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1914         if (cb->opaque == cb_opaque) {
1915             cb->ops.destroy (cb_opaque);
1916             LIST_REMOVE (cb, entries);
1917             qemu_free (cb);
1918
1919             if (!cap->cb_head.lh_first) {
1920                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1921
1922                 while (sw) {
1923                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1924 #ifdef DEBUG_CAPTURE
1925                     dolog ("freeing %s\n", sw->name);
1926 #endif
1927
1928                     sw1 = sw->entries.le_next;
1929                     if (sw->rate) {
1930                         st_rate_stop (sw->rate);
1931                         sw->rate = NULL;
1932                     }
1933                     LIST_REMOVE (sw, entries);
1934                     LIST_REMOVE (sc, entries);
1935                     qemu_free (sc);
1936                     sw = sw1;
1937                 }
1938                 LIST_REMOVE (cap, entries);
1939                 qemu_free (cap);
1940             }
1941             return;
1942         }
1943     }
1944 }
1945
1946 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1947 {
1948     if (sw) {
1949         sw->vol.mute = mute;
1950         sw->vol.l = nominal_volume.l * lvol / 255;
1951         sw->vol.r = nominal_volume.r * rvol / 255;
1952     }
1953 }
1954
1955 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1956 {
1957     if (sw) {
1958         sw->vol.mute = mute;
1959         sw->vol.l = nominal_volume.l * lvol / 255;
1960         sw->vol.r = nominal_volume.r * rvol / 255;
1961     }
1962 }