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 #ifdef CONFIG_OSS
  42     &oss_audio_driver,
  43 #endif
  44 #ifdef CONFIG_ALSA
  45     &alsa_audio_driver,
  46 #endif
  47 #ifdef CONFIG_COREAUDIO
  48     &coreaudio_audio_driver,
  49 #endif
  50 #ifdef CONFIG_DSOUND
  51     &dsound_audio_driver,
  52 #endif
  53 #ifdef CONFIG_FMOD
  54     &fmod_audio_driver,
  55 #endif
  56 #ifdef CONFIG_SDL
  57     &sdl_audio_driver,
  58 #endif
  59 #ifdef CONFIG_ESD
  60     &esd_audio_driver,
  61 #endif
  62     &no_audio_driver,
  63     &wav_audio_driver
  64 };
  65
  66 struct fixed_settings {
  67     int enabled;
  68     int nb_voices;
  69     int greedy;
  70     audsettings_t settings;
  71 };
  72
  73 static struct {
  74     struct fixed_settings fixed_out;
  75     struct fixed_settings fixed_in;
  76     union {
  77         int hz;
  78         int64_t ticks;
  79     } period;
  80     int plive;
  81     int log_to_monitor;
  82 } conf = {
  83     {                           /* DAC fixed settings */
  84         1,                      /* enabled */
  85         1,                      /* nb_voices */
  86         1,                      /* greedy */
  87         {
  88             44100,              /* freq */
  89             2,                  /* nchannels */
  90             AUD_FMT_S16,        /* fmt */
  91             AUDIO_HOST_ENDIANNESS
  92         }
  93     },
  94
  95     {                           /* ADC fixed settings */
  96         1,                      /* enabled */
  97         1,                      /* nb_voices */
  98         1,                      /* greedy */
  99         {
 100             44100,              /* freq */
 101             2,                  /* nchannels */
 102             AUD_FMT_S16,        /* fmt */
 103             AUDIO_HOST_ENDIANNESS
 104         }
 105     },
 106
 107     { 0 },                      /* period */
 108     0,                          /* plive */
 109     0                           /* log_to_monitor */
 110 };
 111
 112 static AudioState glob_audio_state;
 113
 114 volume_t nominal_volume = {
 115     0,
 116 #ifdef FLOAT_MIXENG
 117     1.0,
 118     1.0
 119 #else
 120     1ULL << 32,
 121     1ULL << 32
 122 #endif
 123 };
 124
 125 /* http://www.df.lth.se/~john_e/gems/gem002d.html */
 126 /* http://www.multi-platforms.com/Tips/PopCount.htm */
 127 uint32_t popcount (uint32_t u)
 128 {
 129     u = ((u&0x55555555) + ((u>>1)&0x55555555));
 130     u = ((u&0x33333333) + ((u>>2)&0x33333333));
 131     u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
 132     u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
 133     u = ( u&0x0000ffff) + (u>>16);
 134     return u;
 135 }
 136
 137 inline uint32_t lsbindex (uint32_t u)
 138 {
 139     return popcount ((u&-u)-1);
 140 }
 141
 142 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 143 #error No its not
 144 #else
 145 int audio_bug (const char *funcname, int cond)
 146 {
 147     if (cond) {
 148         static int shown;
 149
 150         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 151         if (!shown) {
 152             shown = 1;
 153             AUD_log (NULL, "Save all your work and restart without audio\n");
 154             AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
 155             AUD_log (NULL, "I am sorry\n");
 156         }
 157         AUD_log (NULL, "Context:\n");
 158
 159 #if defined AUDIO_BREAKPOINT_ON_BUG
 160 #  if defined HOST_I386
 161 #    if defined __GNUC__
 162         __asm__ ("int3");
 163 #    elif defined _MSC_VER
 164         _asm _emit 0xcc;
 165 #    else
 166         abort ();
 167 #    endif
 168 #  else
 169         abort ();
 170 #  endif
 171 #endif
 172     }
 173
 174     return cond;
 175 }
 176 #endif
 177
 178 static inline int audio_bits_to_index (int bits)
 179 {
 180     switch (bits) {
 181     case 8:
 182         return 0;
 183
 184     case 16:
 185         return 1;
 186
 187     case 32:
 188         return 2;
 189
 190     default:
 191         audio_bug ("bits_to_index", 1);
 192         AUD_log (NULL, "invalid bits %d\n", bits);
 193         return 0;
 194     }
 195 }
 196
 197 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 198 {
 199     int cond;
 200     size_t len;
 201
 202     len = nmemb * size;
 203     cond = !nmemb || !size;
 204     cond |= nmemb < 0;
 205     cond |= len < size;
 206
 207     if (audio_bug ("audio_calloc", cond)) {
 208         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 209                  funcname);
 210         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 211         return NULL;
 212     }
 213
 214     return qemu_mallocz (len);
 215 }
 216
 217 static char *audio_alloc_prefix (const char *s)
 218 {
 219     const char qemu_prefix[] = "QEMU_";
 220     size_t len;
 221     char *r;
 222
 223     if (!s) {
 224         return NULL;
 225     }
 226
 227     len = strlen (s);
 228     r = qemu_malloc (len + sizeof (qemu_prefix));
 229
 230     if (r) {
 231         size_t i;
 232         char *u = r + sizeof (qemu_prefix) - 1;
 233
 234         strcpy (r, qemu_prefix);
 235         strcat (r, s);
 236
 237         for (i = 0; i < len; ++i) {
 238             u[i] = toupper (u[i]);
 239         }
 240     }
 241     return r;
 242 }
 243
 244 static const char *audio_audfmt_to_string (audfmt_e fmt)
 245 {
 246     switch (fmt) {
 247     case AUD_FMT_U8:
 248         return "U8";
 249
 250     case AUD_FMT_U16:
 251         return "U16";
 252
 253     case AUD_FMT_S8:
 254         return "S8";
 255
 256     case AUD_FMT_S16:
 257         return "S16";
 258
 259     case AUD_FMT_U32:
 260         return "U32";
 261
 262     case AUD_FMT_S32:
 263         return "S32";
 264     }
 265
 266     dolog ("Bogus audfmt %d returning S16\n", fmt);
 267     return "S16";
 268 }
 269
 270 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 271                                         int *defaultp)
 272 {
 273     if (!strcasecmp (s, "u8")) {
 274         *defaultp = 0;
 275         return AUD_FMT_U8;
 276     }
 277     else if (!strcasecmp (s, "u16")) {
 278         *defaultp = 0;
 279         return AUD_FMT_U16;
 280     }
 281     else if (!strcasecmp (s, "u32")) {
 282         *defaultp = 0;
 283         return AUD_FMT_U32;
 284     }
 285     else if (!strcasecmp (s, "s8")) {
 286         *defaultp = 0;
 287         return AUD_FMT_S8;
 288     }
 289     else if (!strcasecmp (s, "s16")) {
 290         *defaultp = 0;
 291         return AUD_FMT_S16;
 292     }
 293     else if (!strcasecmp (s, "s32")) {
 294         *defaultp = 0;
 295         return AUD_FMT_S32;
 296     }
 297     else {
 298         dolog ("Bogus audio format `%s' using %s\n",
 299                s, audio_audfmt_to_string (defval));
 300         *defaultp = 1;
 301         return defval;
 302     }
 303 }
 304
 305 static audfmt_e audio_get_conf_fmt (const char *envname,
 306                                     audfmt_e defval,
 307                                     int *defaultp)
 308 {
 309     const char *var = getenv (envname);
 310     if (!var) {
 311         *defaultp = 1;
 312         return defval;
 313     }
 314     return audio_string_to_audfmt (var, defval, defaultp);
 315 }
 316
 317 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 318 {
 319     int val;
 320     char *strval;
 321
 322     strval = getenv (key);
 323     if (strval) {
 324         *defaultp = 0;
 325         val = atoi (strval);
 326         return val;
 327     }
 328     else {
 329         *defaultp = 1;
 330         return defval;
 331     }
 332 }
 333
 334 static const char *audio_get_conf_str (const char *key,
 335                                        const char *defval,
 336                                        int *defaultp)
 337 {
 338     const char *val = getenv (key);
 339     if (!val) {
 340         *defaultp = 1;
 341         return defval;
 342     }
 343     else {
 344         *defaultp = 0;
 345         return val;
 346     }
 347 }
 348
 349 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 350 {
 351     if (conf.log_to_monitor) {
 352         if (cap) {
 353             term_printf ("%s: ", cap);
 354         }
 355
 356         term_vprintf (fmt, ap);
 357     }
 358     else {
 359         if (cap) {
 360             fprintf (stderr, "%s: ", cap);
 361         }
 362
 363         vfprintf (stderr, fmt, ap);
 364     }
 365 }
 366
 367 void AUD_log (const char *cap, const char *fmt, ...)
 368 {
 369     va_list ap;
 370
 371     va_start (ap, fmt);
 372     AUD_vlog (cap, fmt, ap);
 373     va_end (ap);
 374 }
 375
 376 static void audio_print_options (const char *prefix,
 377                                  struct audio_option *opt)
 378 {
 379     char *uprefix;
 380
 381     if (!prefix) {
 382         dolog ("No prefix specified\n");
 383         return;
 384     }
 385
 386     if (!opt) {
 387         dolog ("No options\n");
 388         return;
 389     }
 390
 391     uprefix = audio_alloc_prefix (prefix);
 392
 393     for (; opt->name; opt++) {
 394         const char *state = "default";
 395         printf ("  %s_%s: ", uprefix, opt->name);
 396
 397         if (opt->overriddenp && *opt->overriddenp) {
 398             state = "current";
 399         }
 400
 401         switch (opt->tag) {
 402         case AUD_OPT_BOOL:
 403             {
 404                 int *intp = opt->valp;
 405                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 406             }
 407             break;
 408
 409         case AUD_OPT_INT:
 410             {
 411                 int *intp = opt->valp;
 412                 printf ("integer, %s = %d\n", state, *intp);
 413             }
 414             break;
 415
 416         case AUD_OPT_FMT:
 417             {
 418                 audfmt_e *fmtp = opt->valp;
 419                 printf (
 420                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 421                     state,
 422                     audio_audfmt_to_string (*fmtp)
 423                     );
 424             }
 425             break;
 426
 427         case AUD_OPT_STR:
 428             {
 429                 const char **strp = opt->valp;
 430                 printf ("string, %s = %s\n",
 431                         state,
 432                         *strp ? *strp : "(not set)");
 433             }
 434             break;
 435
 436         default:
 437             printf ("???\n");
 438             dolog ("Bad value tag for option %s_%s %d\n",
 439                    uprefix, opt->name, opt->tag);
 440             break;
 441         }
 442         printf ("    %s\n", opt->descr);
 443     }
 444
 445     qemu_free (uprefix);
 446 }
 447
 448 static void audio_process_options (const char *prefix,
 449                                    struct audio_option *opt)
 450 {
 451     char *optname;
 452     const char qemu_prefix[] = "QEMU_";
 453     size_t preflen;
 454
 455     if (audio_bug (AUDIO_FUNC, !prefix)) {
 456         dolog ("prefix = NULL\n");
 457         return;
 458     }
 459
 460     if (audio_bug (AUDIO_FUNC, !opt)) {
 461         dolog ("opt = NULL\n");
 462         return;
 463     }
 464
 465     preflen = strlen (prefix);
 466
 467     for (; opt->name; opt++) {
 468         size_t len, i;
 469         int def;
 470
 471         if (!opt->valp) {
 472             dolog ("Option value pointer for `%s' is not set\n",
 473                    opt->name);
 474             continue;
 475         }
 476
 477         len = strlen (opt->name);
 478         /* len of opt->name + len of prefix + size of qemu_prefix
 479          * (includes trailing zero) + zero + underscore (on behalf of
 480          * sizeof) */
 481         optname = qemu_malloc (len + preflen + sizeof (qemu_prefix) + 1);
 482         if (!optname) {
 483             dolog ("Could not allocate memory for option name `%s'\n",
 484                    opt->name);
 485             continue;
 486         }
 487
 488         strcpy (optname, qemu_prefix);
 489
 490         /* copy while upper-casing, including trailing zero */
 491         for (i = 0; i <= preflen; ++i) {
 492             optname[i + sizeof (qemu_prefix) - 1] = toupper (prefix[i]);
 493         }
 494         strcat (optname, "_");
 495         strcat (optname, opt->name);
 496
 497         def = 1;
 498         switch (opt->tag) {
 499         case AUD_OPT_BOOL:
 500         case AUD_OPT_INT:
 501             {
 502                 int *intp = opt->valp;
 503                 *intp = audio_get_conf_int (optname, *intp, &def);
 504             }
 505             break;
 506
 507         case AUD_OPT_FMT:
 508             {
 509                 audfmt_e *fmtp = opt->valp;
 510                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 511             }
 512             break;
 513
 514         case AUD_OPT_STR:
 515             {
 516                 const char **strp = opt->valp;
 517                 *strp = audio_get_conf_str (optname, *strp, &def);
 518             }
 519             break;
 520
 521         default:
 522             dolog ("Bad value tag for option `%s' - %d\n",
 523                    optname, opt->tag);
 524             break;
 525         }
 526
 527         if (!opt->overriddenp) {
 528             opt->overriddenp = &opt->overridden;
 529         }
 530         *opt->overriddenp = !def;
 531         qemu_free (optname);
 532     }
 533 }
 534
 535 static void audio_print_settings (audsettings_t *as)
 536 {
 537     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 538
 539     switch (as->fmt) {
 540     case AUD_FMT_S8:
 541         AUD_log (NULL, "S8");
 542         break;
 543     case AUD_FMT_U8:
 544         AUD_log (NULL, "U8");
 545         break;
 546     case AUD_FMT_S16:
 547         AUD_log (NULL, "S16");
 548         break;
 549     case AUD_FMT_U16:
 550         AUD_log (NULL, "U16");
 551         break;
 552     default:
 553         AUD_log (NULL, "invalid(%d)", as->fmt);
 554         break;
 555     }
 556
 557     AUD_log (NULL, " endianness=");
 558     switch (as->endianness) {
 559     case 0:
 560         AUD_log (NULL, "little");
 561         break;
 562     case 1:
 563         AUD_log (NULL, "big");
 564         break;
 565     default:
 566         AUD_log (NULL, "invalid");
 567         break;
 568     }
 569     AUD_log (NULL, "\n");
 570 }
 571
 572 static int audio_validate_settings (audsettings_t *as)
 573 {
 574     int invalid;
 575
 576     invalid = as->nchannels != 1 && as->nchannels != 2;
 577     invalid |= as->endianness != 0 && as->endianness != 1;
 578
 579     switch (as->fmt) {
 580     case AUD_FMT_S8:
 581     case AUD_FMT_U8:
 582     case AUD_FMT_S16:
 583     case AUD_FMT_U16:
 584     case AUD_FMT_S32:
 585     case AUD_FMT_U32:
 586         break;
 587     default:
 588         invalid = 1;
 589         break;
 590     }
 591
 592     invalid |= as->freq <= 0;
 593     return invalid ? -1 : 0;
 594 }
 595
 596 static int audio_pcm_info_eq (struct audio_pcm_info *info, audsettings_t *as)
 597 {
 598     int bits = 8, sign = 0;
 599
 600     switch (as->fmt) {
 601     case AUD_FMT_S8:
 602         sign = 1;
 603     case AUD_FMT_U8:
 604         break;
 605
 606     case AUD_FMT_S16:
 607         sign = 1;
 608     case AUD_FMT_U16:
 609         bits = 16;
 610         break;
 611
 612     case AUD_FMT_S32:
 613         sign = 1;
 614     case AUD_FMT_U32:
 615         bits = 32;
 616         break;
 617     }
 618     return info->freq == as->freq
 619         && info->nchannels == as->nchannels
 620         && info->sign == sign
 621         && info->bits == bits
 622         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 623 }
 624
 625 void audio_pcm_init_info (struct audio_pcm_info *info, audsettings_t *as)
 626 {
 627     int bits = 8, sign = 0, shift = 0;
 628
 629     switch (as->fmt) {
 630     case AUD_FMT_S8:
 631         sign = 1;
 632     case AUD_FMT_U8:
 633         break;
 634
 635     case AUD_FMT_S16:
 636         sign = 1;
 637     case AUD_FMT_U16:
 638         bits = 16;
 639         shift = 1;
 640         break;
 641
 642     case AUD_FMT_S32:
 643         sign = 1;
 644     case AUD_FMT_U32:
 645         bits = 32;
 646         shift = 2;
 647         break;
 648     }
 649
 650     info->freq = as->freq;
 651     info->bits = bits;
 652     info->sign = sign;
 653     info->nchannels = as->nchannels;
 654     info->shift = (as->nchannels == 2) + shift;
 655     info->align = (1 << info->shift) - 1;
 656     info->bytes_per_second = info->freq << info->shift;
 657     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 658 }
 659
 660 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 661 {
 662     if (!len) {
 663         return;
 664     }
 665
 666     if (info->sign) {
 667         memset (buf, 0x00, len << info->shift);
 668     }
 669     else {
 670         switch (info->bits) {
 671         case 8:
 672             memset (buf, 0x80, len << info->shift);
 673             break;
 674
 675         case 16:
 676             {
 677                 int i;
 678                 uint16_t *p = buf;
 679                 int shift = info->nchannels - 1;
 680                 short s = INT16_MAX;
 681
 682                 if (info->swap_endianness) {
 683                     s = bswap16 (s);
 684                 }
 685
 686                 for (i = 0; i < len << shift; i++) {
 687                     p[i] = s;
 688                 }
 689             }
 690             break;
 691
 692         case 32:
 693             {
 694                 int i;
 695                 uint32_t *p = buf;
 696                 int shift = info->nchannels - 1;
 697                 int32_t s = INT32_MAX;
 698
 699                 if (info->swap_endianness) {
 700                     s = bswap32 (s);
 701                 }
 702
 703                 for (i = 0; i < len << shift; i++) {
 704                     p[i] = s;
 705                 }
 706             }
 707             break;
 708
 709         default:
 710             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 711                      info->bits);
 712             break;
 713         }
 714     }
 715 }
 716
 717 /*
 718  * Capture
 719  */
 720 static void noop_conv (st_sample_t *dst, const void *src,
 721                        int samples, volume_t *vol)
 722 {
 723     (void) src;
 724     (void) dst;
 725     (void) samples;
 726     (void) vol;
 727 }
 728
 729 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 730     AudioState *s,
 731     audsettings_t *as
 732     )
 733 {
 734     CaptureVoiceOut *cap;
 735
 736     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 737         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 738             return cap;
 739         }
 740     }
 741     return NULL;
 742 }
 743
 744 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 745 {
 746     struct capture_callback *cb;
 747
 748 #ifdef DEBUG_CAPTURE
 749     dolog ("notification %d sent\n", cmd);
 750 #endif
 751     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 752         cb->ops.notify (cb->opaque, cmd);
 753     }
 754 }
 755
 756 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 757 {
 758     if (cap->hw.enabled != enabled) {
 759         audcnotification_e cmd;
 760         cap->hw.enabled = enabled;
 761         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 762         audio_notify_capture (cap, cmd);
 763     }
 764 }
 765
 766 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 767 {
 768     HWVoiceOut *hw = &cap->hw;
 769     SWVoiceOut *sw;
 770     int enabled = 0;
 771
 772     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 773         if (sw->active) {
 774             enabled = 1;
 775             break;
 776         }
 777     }
 778     audio_capture_maybe_changed (cap, enabled);
 779 }
 780
 781 static void audio_detach_capture (HWVoiceOut *hw)
 782 {
 783     SWVoiceCap *sc = hw->cap_head.lh_first;
 784
 785     while (sc) {
 786         SWVoiceCap *sc1 = sc->entries.le_next;
 787         SWVoiceOut *sw = &sc->sw;
 788         CaptureVoiceOut *cap = sc->cap;
 789         int was_active = sw->active;
 790
 791         if (sw->rate) {
 792             st_rate_stop (sw->rate);
 793             sw->rate = NULL;
 794         }
 795
 796         LIST_REMOVE (sw, entries);
 797         LIST_REMOVE (sc, entries);
 798         qemu_free (sc);
 799         if (was_active) {
 800             /* We have removed soft voice from the capture:
 801                this might have changed the overall status of the capture
 802                since this might have been the only active voice */
 803             audio_recalc_and_notify_capture (cap);
 804         }
 805         sc = sc1;
 806     }
 807 }
 808
 809 static int audio_attach_capture (AudioState *s, HWVoiceOut *hw)
 810 {
 811     CaptureVoiceOut *cap;
 812
 813     audio_detach_capture (hw);
 814     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 815         SWVoiceCap *sc;
 816         SWVoiceOut *sw;
 817         HWVoiceOut *hw_cap = &cap->hw;
 818
 819         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 820         if (!sc) {
 821             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 822                    sizeof (*sc));
 823             return -1;
 824         }
 825
 826         sc->cap = cap;
 827         sw = &sc->sw;
 828         sw->hw = hw_cap;
 829         sw->info = hw->info;
 830         sw->empty = 1;
 831         sw->active = hw->enabled;
 832         sw->conv = noop_conv;
 833         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 834         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 835         if (!sw->rate) {
 836             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 837             qemu_free (sw);
 838             return -1;
 839         }
 840         LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 841         LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 842 #ifdef DEBUG_CAPTURE
 843         asprintf (&sw->name, "for %p %d,%d,%d",
 844                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 845         dolog ("Added %s active = %d\n", sw->name, sw->active);
 846 #endif
 847         if (sw->active) {
 848             audio_capture_maybe_changed (cap, 1);
 849         }
 850     }
 851     return 0;
 852 }
 853
 854 /*
 855  * Hard voice (capture)
 856  */
 857 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 858 {
 859     SWVoiceIn *sw;
 860     int m = hw->total_samples_captured;
 861
 862     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 863         if (sw->active) {
 864             m = audio_MIN (m, sw->total_hw_samples_acquired);
 865         }
 866     }
 867     return m;
 868 }
 869
 870 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 871 {
 872     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 873     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 874         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 875         return 0;
 876     }
 877     return live;
 878 }
 879
 880 /*
 881  * Soft voice (capture)
 882  */
 883 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 884 {
 885     HWVoiceIn *hw = sw->hw;
 886     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 887     int rpos;
 888
 889     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 890         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 891         return 0;
 892     }
 893
 894     rpos = hw->wpos - live;
 895     if (rpos >= 0) {
 896         return rpos;
 897     }
 898     else {
 899         return hw->samples + rpos;
 900     }
 901 }
 902
 903 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 904 {
 905     HWVoiceIn *hw = sw->hw;
 906     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 907     st_sample_t *src, *dst = sw->buf;
 908
 909     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 910
 911     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 912     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 913         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 914         return 0;
 915     }
 916
 917     samples = size >> sw->info.shift;
 918     if (!live) {
 919         return 0;
 920     }
 921
 922     swlim = (live * sw->ratio) >> 32;
 923     swlim = audio_MIN (swlim, samples);
 924
 925     while (swlim) {
 926         src = hw->conv_buf + rpos;
 927         isamp = hw->wpos - rpos;
 928         /* XXX: <= ? */
 929         if (isamp <= 0) {
 930             isamp = hw->samples - rpos;
 931         }
 932
 933         if (!isamp) {
 934             break;
 935         }
 936         osamp = swlim;
 937
 938         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 939             dolog ("osamp=%d\n", osamp);
 940             return 0;
 941         }
 942
 943         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 944         swlim -= osamp;
 945         rpos = (rpos + isamp) % hw->samples;
 946         dst += osamp;
 947         ret += osamp;
 948         total += isamp;
 949     }
 950
 951     sw->clip (buf, sw->buf, ret);
 952     sw->total_hw_samples_acquired += total;
 953     return ret << sw->info.shift;
 954 }
 955
 956 /*
 957  * Hard voice (playback)
 958  */
 959 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 960 {
 961     SWVoiceOut *sw;
 962     int m = INT_MAX;
 963     int nb_live = 0;
 964
 965     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 966         if (sw->active || !sw->empty) {
 967             m = audio_MIN (m, sw->total_hw_samples_mixed);
 968             nb_live += 1;
 969         }
 970     }
 971
 972     *nb_livep = nb_live;
 973     return m;
 974 }
 975
 976 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 977 {
 978     int smin;
 979
 980     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 981
 982     if (!*nb_live) {
 983         return 0;
 984     }
 985     else {
 986         int live = smin;
 987
 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 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 997 {
 998     int nb_live;
 999     int live;
1000
1001     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1002     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1003         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1004         return 0;
1005     }
1006     return live;
1007 }
1008
1009 /*
1010  * Soft voice (playback)
1011  */
1012 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1013 {
1014     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1015     int ret = 0, pos = 0, total = 0;
1016
1017     if (!sw) {
1018         return size;
1019     }
1020
1021     hwsamples = sw->hw->samples;
1022
1023     live = sw->total_hw_samples_mixed;
1024     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1025         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1026         return 0;
1027     }
1028
1029     if (live == hwsamples) {
1030 #ifdef DEBUG_OUT
1031         dolog ("%s is full %d\n", sw->name, live);
1032 #endif
1033         return 0;
1034     }
1035
1036     wpos = (sw->hw->rpos + live) % hwsamples;
1037     samples = size >> sw->info.shift;
1038
1039     dead = hwsamples - live;
1040     swlim = ((int64_t) dead << 32) / sw->ratio;
1041     swlim = audio_MIN (swlim, samples);
1042     if (swlim) {
1043         sw->conv (sw->buf, buf, swlim, &sw->vol);
1044     }
1045
1046     while (swlim) {
1047         dead = hwsamples - live;
1048         left = hwsamples - wpos;
1049         blck = audio_MIN (dead, left);
1050         if (!blck) {
1051             break;
1052         }
1053         isamp = swlim;
1054         osamp = blck;
1055         st_rate_flow_mix (
1056             sw->rate,
1057             sw->buf + pos,
1058             sw->hw->mix_buf + wpos,
1059             &isamp,
1060             &osamp
1061             );
1062         ret += isamp;
1063         swlim -= isamp;
1064         pos += isamp;
1065         live += osamp;
1066         wpos = (wpos + osamp) % hwsamples;
1067         total += osamp;
1068     }
1069
1070     sw->total_hw_samples_mixed += total;
1071     sw->empty = sw->total_hw_samples_mixed == 0;
1072
1073 #ifdef DEBUG_OUT
1074     dolog (
1075         "%s: write size %d ret %d total sw %d\n",
1076         SW_NAME (sw),
1077         size >> sw->info.shift,
1078         ret,
1079         sw->total_hw_samples_mixed
1080         );
1081 #endif
1082
1083     return ret << sw->info.shift;
1084 }
1085
1086 #ifdef DEBUG_AUDIO
1087 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1088 {
1089     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1090            cap, info->bits, info->sign, info->freq, info->nchannels);
1091 }
1092 #endif
1093
1094 #define DAC
1095 #include "audio_template.h"
1096 #undef DAC
1097 #include "audio_template.h"
1098
1099 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1100 {
1101     int bytes;
1102
1103     if (!sw) {
1104         /* XXX: Consider options */
1105         return size;
1106     }
1107
1108     if (!sw->hw->enabled) {
1109         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1110         return 0;
1111     }
1112
1113     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1114     return bytes;
1115 }
1116
1117 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1118 {
1119     int bytes;
1120
1121     if (!sw) {
1122         /* XXX: Consider options */
1123         return size;
1124     }
1125
1126     if (!sw->hw->enabled) {
1127         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1128         return 0;
1129     }
1130
1131     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1132     return bytes;
1133 }
1134
1135 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1136 {
1137     return sw->hw->samples << sw->hw->info.shift;
1138 }
1139
1140 void AUD_set_active_out (SWVoiceOut *sw, int on)
1141 {
1142     HWVoiceOut *hw;
1143
1144     if (!sw) {
1145         return;
1146     }
1147
1148     hw = sw->hw;
1149     if (sw->active != on) {
1150         SWVoiceOut *temp_sw;
1151         SWVoiceCap *sc;
1152
1153         if (on) {
1154             hw->pending_disable = 0;
1155             if (!hw->enabled) {
1156                 hw->enabled = 1;
1157                 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1158             }
1159         }
1160         else {
1161             if (hw->enabled) {
1162                 int nb_active = 0;
1163
1164                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1165                      temp_sw = temp_sw->entries.le_next) {
1166                     nb_active += temp_sw->active != 0;
1167                 }
1168
1169                 hw->pending_disable = nb_active == 1;
1170             }
1171         }
1172
1173         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1174             sc->sw.active = hw->enabled;
1175             if (hw->enabled) {
1176                 audio_capture_maybe_changed (sc->cap, 1);
1177             }
1178         }
1179         sw->active = on;
1180     }
1181 }
1182
1183 void AUD_set_active_in (SWVoiceIn *sw, int on)
1184 {
1185     HWVoiceIn *hw;
1186
1187     if (!sw) {
1188         return;
1189     }
1190
1191     hw = sw->hw;
1192     if (sw->active != on) {
1193         SWVoiceIn *temp_sw;
1194
1195         if (on) {
1196             if (!hw->enabled) {
1197                 hw->enabled = 1;
1198                 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1199             }
1200             sw->total_hw_samples_acquired = hw->total_samples_captured;
1201         }
1202         else {
1203             if (hw->enabled) {
1204                 int nb_active = 0;
1205
1206                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1207                      temp_sw = temp_sw->entries.le_next) {
1208                     nb_active += temp_sw->active != 0;
1209                 }
1210
1211                 if (nb_active == 1) {
1212                     hw->enabled = 0;
1213                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1214                 }
1215             }
1216         }
1217         sw->active = on;
1218     }
1219 }
1220
1221 static int audio_get_avail (SWVoiceIn *sw)
1222 {
1223     int live;
1224
1225     if (!sw) {
1226         return 0;
1227     }
1228
1229     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1230     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1231         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1232         return 0;
1233     }
1234
1235     ldebug (
1236         "%s: get_avail live %d ret %" PRId64 "\n",
1237         SW_NAME (sw),
1238         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1239         );
1240
1241     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1242 }
1243
1244 static int audio_get_free (SWVoiceOut *sw)
1245 {
1246     int live, dead;
1247
1248     if (!sw) {
1249         return 0;
1250     }
1251
1252     live = sw->total_hw_samples_mixed;
1253
1254     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1255         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1256         return 0;
1257     }
1258
1259     dead = sw->hw->samples - live;
1260
1261 #ifdef DEBUG_OUT
1262     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1263            SW_NAME (sw),
1264            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1265 #endif
1266
1267     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1268 }
1269
1270 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1271 {
1272     int n;
1273
1274     if (hw->enabled) {
1275         SWVoiceCap *sc;
1276
1277         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1278             SWVoiceOut *sw = &sc->sw;
1279             int rpos2 = rpos;
1280
1281             n = samples;
1282             while (n) {
1283                 int till_end_of_hw = hw->samples - rpos2;
1284                 int to_write = audio_MIN (till_end_of_hw, n);
1285                 int bytes = to_write << hw->info.shift;
1286                 int written;
1287
1288                 sw->buf = hw->mix_buf + rpos2;
1289                 written = audio_pcm_sw_write (sw, NULL, bytes);
1290                 if (written - bytes) {
1291                     dolog ("Could not mix %d bytes into a capture "
1292                            "buffer, mixed %d\n",
1293                            bytes, written);
1294                     break;
1295                 }
1296                 n -= to_write;
1297                 rpos2 = (rpos2 + to_write) % hw->samples;
1298             }
1299         }
1300     }
1301
1302     n = audio_MIN (samples, hw->samples - rpos);
1303     mixeng_clear (hw->mix_buf + rpos, n);
1304     mixeng_clear (hw->mix_buf, samples - n);
1305 }
1306
1307 static void audio_run_out (AudioState *s)
1308 {
1309     HWVoiceOut *hw = NULL;
1310     SWVoiceOut *sw;
1311
1312     while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1313         int played;
1314         int live, free, nb_live, cleanup_required, prev_rpos;
1315
1316         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1317         if (!nb_live) {
1318             live = 0;
1319         }
1320
1321         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1322             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1323             continue;
1324         }
1325
1326         if (hw->pending_disable && !nb_live) {
1327             SWVoiceCap *sc;
1328 #ifdef DEBUG_OUT
1329             dolog ("Disabling voice\n");
1330 #endif
1331             hw->enabled = 0;
1332             hw->pending_disable = 0;
1333             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1334             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1335                 sc->sw.active = 0;
1336                 audio_recalc_and_notify_capture (sc->cap);
1337             }
1338             continue;
1339         }
1340
1341         if (!live) {
1342             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1343                 if (sw->active) {
1344                     free = audio_get_free (sw);
1345                     if (free > 0) {
1346                         sw->callback.fn (sw->callback.opaque, free);
1347                     }
1348                 }
1349             }
1350             continue;
1351         }
1352
1353         prev_rpos = hw->rpos;
1354         played = hw->pcm_ops->run_out (hw);
1355         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1356             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1357                    hw->rpos, hw->samples, played);
1358             hw->rpos = 0;
1359         }
1360
1361 #ifdef DEBUG_OUT
1362         dolog ("played=%d\n", played);
1363 #endif
1364
1365         if (played) {
1366             hw->ts_helper += played;
1367             audio_capture_mix_and_clear (hw, prev_rpos, played);
1368         }
1369
1370         cleanup_required = 0;
1371         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1372             if (!sw->active && sw->empty) {
1373                 continue;
1374             }
1375
1376             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1377                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1378                        played, sw->total_hw_samples_mixed);
1379                 played = sw->total_hw_samples_mixed;
1380             }
1381
1382             sw->total_hw_samples_mixed -= played;
1383
1384             if (!sw->total_hw_samples_mixed) {
1385                 sw->empty = 1;
1386                 cleanup_required |= !sw->active && !sw->callback.fn;
1387             }
1388
1389             if (sw->active) {
1390                 free = audio_get_free (sw);
1391                 if (free > 0) {
1392                     sw->callback.fn (sw->callback.opaque, free);
1393                 }
1394             }
1395         }
1396
1397         if (cleanup_required) {
1398             SWVoiceOut *sw1;
1399
1400             sw = hw->sw_head.lh_first;
1401             while (sw) {
1402                 sw1 = sw->entries.le_next;
1403                 if (!sw->active && !sw->callback.fn) {
1404 #ifdef DEBUG_PLIVE
1405                     dolog ("Finishing with old voice\n");
1406 #endif
1407                     audio_close_out (s, sw);
1408                 }
1409                 sw = sw1;
1410             }
1411         }
1412     }
1413 }
1414
1415 static void audio_run_in (AudioState *s)
1416 {
1417     HWVoiceIn *hw = NULL;
1418
1419     while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1420         SWVoiceIn *sw;
1421         int captured, min;
1422
1423         captured = hw->pcm_ops->run_in (hw);
1424
1425         min = audio_pcm_hw_find_min_in (hw);
1426         hw->total_samples_captured += captured - min;
1427         hw->ts_helper += captured;
1428
1429         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1430             sw->total_hw_samples_acquired -= min;
1431
1432             if (sw->active) {
1433                 int avail;
1434
1435                 avail = audio_get_avail (sw);
1436                 if (avail > 0) {
1437                     sw->callback.fn (sw->callback.opaque, avail);
1438                 }
1439             }
1440         }
1441     }
1442 }
1443
1444 static void audio_run_capture (AudioState *s)
1445 {
1446     CaptureVoiceOut *cap;
1447
1448     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1449         int live, rpos, captured;
1450         HWVoiceOut *hw = &cap->hw;
1451         SWVoiceOut *sw;
1452
1453         captured = live = audio_pcm_hw_get_live_out (hw);
1454         rpos = hw->rpos;
1455         while (live) {
1456             int left = hw->samples - rpos;
1457             int to_capture = audio_MIN (live, left);
1458             st_sample_t *src;
1459             struct capture_callback *cb;
1460
1461             src = hw->mix_buf + rpos;
1462             hw->clip (cap->buf, src, to_capture);
1463             mixeng_clear (src, to_capture);
1464
1465             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1466                 cb->ops.capture (cb->opaque, cap->buf,
1467                                  to_capture << hw->info.shift);
1468             }
1469             rpos = (rpos + to_capture) % hw->samples;
1470             live -= to_capture;
1471         }
1472         hw->rpos = rpos;
1473
1474         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1475             if (!sw->active && sw->empty) {
1476                 continue;
1477             }
1478
1479             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1480                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1481                        captured, sw->total_hw_samples_mixed);
1482                 captured = sw->total_hw_samples_mixed;
1483             }
1484
1485             sw->total_hw_samples_mixed -= captured;
1486             sw->empty = sw->total_hw_samples_mixed == 0;
1487         }
1488     }
1489 }
1490
1491 static void audio_timer (void *opaque)
1492 {
1493     AudioState *s = opaque;
1494
1495     audio_run_out (s);
1496     audio_run_in (s);
1497     audio_run_capture (s);
1498
1499     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1500 }
1501
1502 static struct audio_option audio_options[] = {
1503     /* DAC */
1504     {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1505      "Use fixed settings for host DAC", NULL, 0},
1506
1507     {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1508      "Frequency for fixed host DAC", NULL, 0},
1509
1510     {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1511      "Format for fixed host DAC", NULL, 0},
1512
1513     {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1514      "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1515
1516     {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1517      "Number of voices for DAC", NULL, 0},
1518
1519     /* ADC */
1520     {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1521      "Use fixed settings for host ADC", NULL, 0},
1522
1523     {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1524      "Frequency for fixed host ADC", NULL, 0},
1525
1526     {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1527      "Format for fixed host ADC", NULL, 0},
1528
1529     {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1530      "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1531
1532     {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1533      "Number of voices for ADC", NULL, 0},
1534
1535     /* Misc */
1536     {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
1537      "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1538
1539     {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1540      "(undocumented)", NULL, 0},
1541
1542     {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1543      "print logging messages to monitor instead of stderr", NULL, 0},
1544
1545     {NULL, 0, NULL, NULL, NULL, 0}
1546 };
1547
1548 static void audio_pp_nb_voices (const char *typ, int nb)
1549 {
1550     switch (nb) {
1551     case 0:
1552         printf ("Does not support %s\n", typ);
1553         break;
1554     case 1:
1555         printf ("One %s voice\n", typ);
1556         break;
1557     case INT_MAX:
1558         printf ("Theoretically supports many %s voices\n", typ);
1559         break;
1560     default:
1561         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1562         break;
1563     }
1564
1565 }
1566
1567 void AUD_help (void)
1568 {
1569     size_t i;
1570
1571     audio_process_options ("AUDIO", audio_options);
1572     for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1573         struct audio_driver *d = drvtab[i];
1574         if (d->options) {
1575             audio_process_options (d->name, d->options);
1576         }
1577     }
1578
1579     printf ("Audio options:\n");
1580     audio_print_options ("AUDIO", audio_options);
1581     printf ("\n");
1582
1583     printf ("Available drivers:\n");
1584
1585     for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1586         struct audio_driver *d = drvtab[i];
1587
1588         printf ("Name: %s\n", d->name);
1589         printf ("Description: %s\n", d->descr);
1590
1591         audio_pp_nb_voices ("playback", d->max_voices_out);
1592         audio_pp_nb_voices ("capture", d->max_voices_in);
1593
1594         if (d->options) {
1595             printf ("Options:\n");
1596             audio_print_options (d->name, d->options);
1597         }
1598         else {
1599             printf ("No options\n");
1600         }
1601         printf ("\n");
1602     }
1603
1604     printf (
1605         "Options are settable through environment variables.\n"
1606         "Example:\n"
1607 #ifdef _WIN32
1608         "  set QEMU_AUDIO_DRV=wav\n"
1609         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1610 #else
1611         "  export QEMU_AUDIO_DRV=wav\n"
1612         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1613         "(for csh replace export with setenv in the above)\n"
1614 #endif
1615         "  qemu ...\n\n"
1616         );
1617 }
1618
1619 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1620 {
1621     if (drv->options) {
1622         audio_process_options (drv->name, drv->options);
1623     }
1624     s->drv_opaque = drv->init ();
1625
1626     if (s->drv_opaque) {
1627         audio_init_nb_voices_out (s, drv);
1628         audio_init_nb_voices_in (s, drv);
1629         s->drv = drv;
1630         return 0;
1631     }
1632     else {
1633         dolog ("Could not init `%s' audio driver\n", drv->name);
1634         return -1;
1635     }
1636 }
1637
1638 static void audio_vm_change_state_handler (void *opaque, int running)
1639 {
1640     AudioState *s = opaque;
1641     HWVoiceOut *hwo = NULL;
1642     HWVoiceIn *hwi = NULL;
1643     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1644
1645     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1646         hwo->pcm_ops->ctl_out (hwo, op);
1647     }
1648
1649     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1650         hwi->pcm_ops->ctl_in (hwi, op);
1651     }
1652 }
1653
1654 static void audio_atexit (void)
1655 {
1656     AudioState *s = &glob_audio_state;
1657     HWVoiceOut *hwo = NULL;
1658     HWVoiceIn *hwi = NULL;
1659
1660     while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1661         SWVoiceCap *sc;
1662
1663         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1664         hwo->pcm_ops->fini_out (hwo);
1665
1666         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1667             CaptureVoiceOut *cap = sc->cap;
1668             struct capture_callback *cb;
1669
1670             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1671                 cb->ops.destroy (cb->opaque);
1672             }
1673         }
1674     }
1675
1676     while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1677         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1678         hwi->pcm_ops->fini_in (hwi);
1679     }
1680
1681     if (s->drv) {
1682         s->drv->fini (s->drv_opaque);
1683     }
1684 }
1685
1686 static void audio_save (QEMUFile *f, void *opaque)
1687 {
1688     (void) f;
1689     (void) opaque;
1690 }
1691
1692 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1693 {
1694     (void) f;
1695     (void) opaque;
1696
1697     if (version_id != 1) {
1698         return -EINVAL;
1699     }
1700
1701     return 0;
1702 }
1703
1704 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1705 {
1706     card->audio = s;
1707     card->name = qemu_strdup (name);
1708     memset (&card->entries, 0, sizeof (card->entries));
1709     LIST_INSERT_HEAD (&s->card_head, card, entries);
1710 }
1711
1712 void AUD_remove_card (QEMUSoundCard *card)
1713 {
1714     LIST_REMOVE (card, entries);
1715     card->audio = NULL;
1716     qemu_free (card->name);
1717 }
1718
1719 AudioState *AUD_init (void)
1720 {
1721     size_t i;
1722     int done = 0;
1723     const char *drvname;
1724     AudioState *s = &glob_audio_state;
1725
1726     LIST_INIT (&s->hw_head_out);
1727     LIST_INIT (&s->hw_head_in);
1728     LIST_INIT (&s->cap_head);
1729     atexit (audio_atexit);
1730
1731     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1732     if (!s->ts) {
1733         dolog ("Could not create audio timer\n");
1734         return NULL;
1735     }
1736
1737     audio_process_options ("AUDIO", audio_options);
1738
1739     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1740     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1741
1742     if (s->nb_hw_voices_out <= 0) {
1743         dolog ("Bogus number of playback voices %d, setting to 1\n",
1744                s->nb_hw_voices_out);
1745         s->nb_hw_voices_out = 1;
1746     }
1747
1748     if (s->nb_hw_voices_in <= 0) {
1749         dolog ("Bogus number of capture voices %d, setting to 0\n",
1750                s->nb_hw_voices_in);
1751         s->nb_hw_voices_in = 0;
1752     }
1753
1754     {
1755         int def;
1756         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1757     }
1758
1759     if (drvname) {
1760         int found = 0;
1761
1762         for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1763             if (!strcmp (drvname, drvtab[i]->name)) {
1764                 done = !audio_driver_init (s, drvtab[i]);
1765                 found = 1;
1766                 break;
1767             }
1768         }
1769
1770         if (!found) {
1771             dolog ("Unknown audio driver `%s'\n", drvname);
1772             dolog ("Run with -audio-help to list available drivers\n");
1773         }
1774     }
1775
1776     if (!done) {
1777         for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1778             if (drvtab[i]->can_be_default) {
1779                 done = !audio_driver_init (s, drvtab[i]);
1780             }
1781         }
1782     }
1783
1784     if (!done) {
1785         done = !audio_driver_init (s, &no_audio_driver);
1786         if (!done) {
1787             dolog ("Could not initialize audio subsystem\n");
1788         }
1789         else {
1790             dolog ("warning: Using timer based audio emulation\n");
1791         }
1792     }
1793
1794     if (done) {
1795         VMChangeStateEntry *e;
1796
1797         if (conf.period.hz <= 0) {
1798             if (conf.period.hz < 0) {
1799                 dolog ("warning: Timer period is negative - %d "
1800                        "treating as zero\n",
1801                        conf.period.hz);
1802             }
1803             conf.period.ticks = 1;
1804         }
1805         else {
1806             conf.period.ticks = ticks_per_sec / conf.period.hz;
1807         }
1808
1809         e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1810         if (!e) {
1811             dolog ("warning: Could not register change state handler\n"
1812                    "(Audio can continue looping even after stopping the VM)\n");
1813         }
1814     }
1815     else {
1816         qemu_del_timer (s->ts);
1817         return NULL;
1818     }
1819
1820     LIST_INIT (&s->card_head);
1821     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1822     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1823     return s;
1824 }
1825
1826 CaptureVoiceOut *AUD_add_capture (
1827     AudioState *s,
1828     audsettings_t *as,
1829     struct audio_capture_ops *ops,
1830     void *cb_opaque
1831     )
1832 {
1833     CaptureVoiceOut *cap;
1834     struct capture_callback *cb;
1835
1836     if (!s) {
1837         /* XXX suppress */
1838         s = &glob_audio_state;
1839     }
1840
1841     if (audio_validate_settings (as)) {
1842         dolog ("Invalid settings were passed when trying to add capture\n");
1843         audio_print_settings (as);
1844         goto err0;
1845     }
1846
1847     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1848     if (!cb) {
1849         dolog ("Could not allocate capture callback information, size %zu\n",
1850                sizeof (*cb));
1851         goto err0;
1852     }
1853     cb->ops = *ops;
1854     cb->opaque = cb_opaque;
1855
1856     cap = audio_pcm_capture_find_specific (s, as);
1857     if (cap) {
1858         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1859         return cap;
1860     }
1861     else {
1862         HWVoiceOut *hw;
1863         CaptureVoiceOut *cap;
1864
1865         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1866         if (!cap) {
1867             dolog ("Could not allocate capture voice, size %zu\n",
1868                    sizeof (*cap));
1869             goto err1;
1870         }
1871
1872         hw = &cap->hw;
1873         LIST_INIT (&hw->sw_head);
1874         LIST_INIT (&cap->cb_head);
1875
1876         /* XXX find a more elegant way */
1877         hw->samples = 4096 * 4;
1878         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1879                                     sizeof (st_sample_t));
1880         if (!hw->mix_buf) {
1881             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1882                    hw->samples);
1883             goto err2;
1884         }
1885
1886         audio_pcm_init_info (&hw->info, as);
1887
1888         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1889         if (!cap->buf) {
1890             dolog ("Could not allocate capture buffer "
1891                    "(%d samples, each %d bytes)\n",
1892                    hw->samples, 1 << hw->info.shift);
1893             goto err3;
1894         }
1895
1896         hw->clip = mixeng_clip
1897             [hw->info.nchannels == 2]
1898             [hw->info.sign]
1899             [hw->info.swap_endianness]
1900             [audio_bits_to_index (hw->info.bits)];
1901
1902         LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1903         LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1904
1905         hw = NULL;
1906         while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1907             audio_attach_capture (s, hw);
1908         }
1909         return cap;
1910
1911     err3:
1912         qemu_free (cap->hw.mix_buf);
1913     err2:
1914         qemu_free (cap);
1915     err1:
1916         qemu_free (cb);
1917     err0:
1918         return NULL;
1919     }
1920 }
1921
1922 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1923 {
1924     struct capture_callback *cb;
1925
1926     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1927         if (cb->opaque == cb_opaque) {
1928             cb->ops.destroy (cb_opaque);
1929             LIST_REMOVE (cb, entries);
1930             qemu_free (cb);
1931
1932             if (!cap->cb_head.lh_first) {
1933                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1934
1935                 while (sw) {
1936                     SWVoiceCap *sc = (SWVoiceCap *) sw;
1937 #ifdef DEBUG_CAPTURE
1938                     dolog ("freeing %s\n", sw->name);
1939 #endif
1940
1941                     sw1 = sw->entries.le_next;
1942                     if (sw->rate) {
1943                         st_rate_stop (sw->rate);
1944                         sw->rate = NULL;
1945                     }
1946                     LIST_REMOVE (sw, entries);
1947                     LIST_REMOVE (sc, entries);
1948                     qemu_free (sc);
1949                     sw = sw1;
1950                 }
1951                 LIST_REMOVE (cap, entries);
1952                 qemu_free (cap);
1953             }
1954             return;
1955         }
1956     }
1957 }
1958
1959 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1960 {
1961     if (sw) {
1962         sw->vol.mute = mute;
1963         sw->vol.l = nominal_volume.l * lvol / 255;
1964         sw->vol.r = nominal_volume.r * rvol / 255;
1965     }
1966 }
1967
1968 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1969 {
1970     if (sw) {
1971         sw->vol.mute = mute;
1972         sw->vol.l = nominal_volume.l * lvol / 255;
1973         sw->vol.r = nominal_volume.r * rvol / 255;
1974     }
1975 }