audio/audio.c

   1 /*
   2  * QEMU Audio subsystem
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw/hw.h"
  25 #include "audio.h"
  26 #include "monitor.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 #define AUDIO_CAP "audio"
  31 #include "audio_int.h"
  32
  33 /* #define DEBUG_PLIVE */
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37 /* #define DEBUG_POLL */
  38
  39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  40
  41
  42 /* Order of CONFIG_AUDIO_DRIVERS is import.
  43    The 1st one is the one used by default, that is the reason
  44     that we generate the list.
  45 */
  46 static struct audio_driver *drvtab[] = {
  47 #ifdef CONFIG_SPICE
  48     &spice_audio_driver,
  49 #endif
  50     CONFIG_AUDIO_DRIVERS
  51     &no_audio_driver,
  52     &wav_audio_driver
  53 };
  54
  55 struct fixed_settings {
  56     int enabled;
  57     int nb_voices;
  58     int greedy;
  59     struct audsettings settings;
  60 };
  61
  62 static struct {
  63     struct fixed_settings fixed_out;
  64     struct fixed_settings fixed_in;
  65     union {
  66         int hertz;
  67         int64_t ticks;
  68     } period;
  69     int plive;
  70     int log_to_monitor;
  71     int try_poll_in;
  72     int try_poll_out;
  73 } conf = {
  74     .fixed_out = { /* DAC fixed settings */
  75         .enabled = 1,
  76         .nb_voices = 1,
  77         .greedy = 1,
  78         .settings = {
  79             .freq = 44100,
  80             .nchannels = 2,
  81             .fmt = AUD_FMT_S16,
  82             .endianness =  AUDIO_HOST_ENDIANNESS,
  83         }
  84     },
  85
  86     .fixed_in = { /* ADC fixed settings */
  87         .enabled = 1,
  88         .nb_voices = 1,
  89         .greedy = 1,
  90         .settings = {
  91             .freq = 44100,
  92             .nchannels = 2,
  93             .fmt = AUD_FMT_S16,
  94             .endianness = AUDIO_HOST_ENDIANNESS,
  95         }
  96     },
  97
  98     .period = { .hertz = 250 },
  99     .plive = 0,
 100     .log_to_monitor = 0,
 101     .try_poll_in = 1,
 102     .try_poll_out = 1,
 103 };
 104
 105 static AudioState glob_audio_state;
 106
 107 struct mixeng_volume nominal_volume = {
 108     .mute = 0,
 109 #ifdef FLOAT_MIXENG
 110     .r = 1.0,
 111     .l = 1.0,
 112 #else
 113     .r = 1ULL << 32,
 114     .l = 1ULL << 32,
 115 #endif
 116 };
 117
 118 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 119 #error No its not
 120 #else
 121 static void audio_print_options (const char *prefix,
 122                                  struct audio_option *opt);
 123
 124 int audio_bug (const char *funcname, int cond)
 125 {
 126     if (cond) {
 127         static int shown;
 128
 129         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 130         if (!shown) {
 131             struct audio_driver *d;
 132
 133             shown = 1;
 134             AUD_log (NULL, "Save all your work and restart without audio\n");
 135             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 136             AUD_log (NULL, "I am sorry\n");
 137             d = glob_audio_state.drv;
 138             if (d) {
 139                 audio_print_options (d->name, d->options);
 140             }
 141         }
 142         AUD_log (NULL, "Context:\n");
 143
 144 #if defined AUDIO_BREAKPOINT_ON_BUG
 145 #  if defined HOST_I386
 146 #    if defined __GNUC__
 147         __asm__ ("int3");
 148 #    elif defined _MSC_VER
 149         _asm _emit 0xcc;
 150 #    else
 151         abort ();
 152 #    endif
 153 #  else
 154         abort ();
 155 #  endif
 156 #endif
 157     }
 158
 159     return cond;
 160 }
 161 #endif
 162
 163 static inline int audio_bits_to_index (int bits)
 164 {
 165     switch (bits) {
 166     case 8:
 167         return 0;
 168
 169     case 16:
 170         return 1;
 171
 172     case 32:
 173         return 2;
 174
 175     default:
 176         audio_bug ("bits_to_index", 1);
 177         AUD_log (NULL, "invalid bits %d\n", bits);
 178         return 0;
 179     }
 180 }
 181
 182 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 183 {
 184     int cond;
 185     size_t len;
 186
 187     len = nmemb * size;
 188     cond = !nmemb || !size;
 189     cond |= nmemb < 0;
 190     cond |= len < size;
 191
 192     if (audio_bug ("audio_calloc", cond)) {
 193         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 194                  funcname);
 195         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 196         return NULL;
 197     }
 198
 199     return qemu_mallocz (len);
 200 }
 201
 202 static char *audio_alloc_prefix (const char *s)
 203 {
 204     const char qemu_prefix[] = "QEMU_";
 205     size_t len, i;
 206     char *r, *u;
 207
 208     if (!s) {
 209         return NULL;
 210     }
 211
 212     len = strlen (s);
 213     r = qemu_malloc (len + sizeof (qemu_prefix));
 214
 215     u = r + sizeof (qemu_prefix) - 1;
 216
 217     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 218     pstrcat (r, len + sizeof (qemu_prefix), s);
 219
 220     for (i = 0; i < len; ++i) {
 221         u[i] = qemu_toupper(u[i]);
 222     }
 223
 224     return r;
 225 }
 226
 227 static const char *audio_audfmt_to_string (audfmt_e fmt)
 228 {
 229     switch (fmt) {
 230     case AUD_FMT_U8:
 231         return "U8";
 232
 233     case AUD_FMT_U16:
 234         return "U16";
 235
 236     case AUD_FMT_S8:
 237         return "S8";
 238
 239     case AUD_FMT_S16:
 240         return "S16";
 241
 242     case AUD_FMT_U32:
 243         return "U32";
 244
 245     case AUD_FMT_S32:
 246         return "S32";
 247     }
 248
 249     dolog ("Bogus audfmt %d returning S16\n", fmt);
 250     return "S16";
 251 }
 252
 253 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 254                                         int *defaultp)
 255 {
 256     if (!strcasecmp (s, "u8")) {
 257         *defaultp = 0;
 258         return AUD_FMT_U8;
 259     }
 260     else if (!strcasecmp (s, "u16")) {
 261         *defaultp = 0;
 262         return AUD_FMT_U16;
 263     }
 264     else if (!strcasecmp (s, "u32")) {
 265         *defaultp = 0;
 266         return AUD_FMT_U32;
 267     }
 268     else if (!strcasecmp (s, "s8")) {
 269         *defaultp = 0;
 270         return AUD_FMT_S8;
 271     }
 272     else if (!strcasecmp (s, "s16")) {
 273         *defaultp = 0;
 274         return AUD_FMT_S16;
 275     }
 276     else if (!strcasecmp (s, "s32")) {
 277         *defaultp = 0;
 278         return AUD_FMT_S32;
 279     }
 280     else {
 281         dolog ("Bogus audio format `%s' using %s\n",
 282                s, audio_audfmt_to_string (defval));
 283         *defaultp = 1;
 284         return defval;
 285     }
 286 }
 287
 288 static audfmt_e audio_get_conf_fmt (const char *envname,
 289                                     audfmt_e defval,
 290                                     int *defaultp)
 291 {
 292     const char *var = getenv (envname);
 293     if (!var) {
 294         *defaultp = 1;
 295         return defval;
 296     }
 297     return audio_string_to_audfmt (var, defval, defaultp);
 298 }
 299
 300 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 301 {
 302     int val;
 303     char *strval;
 304
 305     strval = getenv (key);
 306     if (strval) {
 307         *defaultp = 0;
 308         val = atoi (strval);
 309         return val;
 310     }
 311     else {
 312         *defaultp = 1;
 313         return defval;
 314     }
 315 }
 316
 317 static const char *audio_get_conf_str (const char *key,
 318                                        const char *defval,
 319                                        int *defaultp)
 320 {
 321     const char *val = getenv (key);
 322     if (!val) {
 323         *defaultp = 1;
 324         return defval;
 325     }
 326     else {
 327         *defaultp = 0;
 328         return val;
 329     }
 330 }
 331
 332 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 333 {
 334     if (conf.log_to_monitor) {
 335         if (cap) {
 336             monitor_printf(default_mon, "%s: ", cap);
 337         }
 338
 339         monitor_vprintf(default_mon, fmt, ap);
 340     }
 341     else {
 342         if (cap) {
 343             fprintf (stderr, "%s: ", cap);
 344         }
 345
 346         vfprintf (stderr, fmt, ap);
 347     }
 348 }
 349
 350 void AUD_log (const char *cap, const char *fmt, ...)
 351 {
 352     va_list ap;
 353
 354     va_start (ap, fmt);
 355     AUD_vlog (cap, fmt, ap);
 356     va_end (ap);
 357 }
 358
 359 static void audio_print_options (const char *prefix,
 360                                  struct audio_option *opt)
 361 {
 362     char *uprefix;
 363
 364     if (!prefix) {
 365         dolog ("No prefix specified\n");
 366         return;
 367     }
 368
 369     if (!opt) {
 370         dolog ("No options\n");
 371         return;
 372     }
 373
 374     uprefix = audio_alloc_prefix (prefix);
 375
 376     for (; opt->name; opt++) {
 377         const char *state = "default";
 378         printf ("  %s_%s: ", uprefix, opt->name);
 379
 380         if (opt->overriddenp && *opt->overriddenp) {
 381             state = "current";
 382         }
 383
 384         switch (opt->tag) {
 385         case AUD_OPT_BOOL:
 386             {
 387                 int *intp = opt->valp;
 388                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 389             }
 390             break;
 391
 392         case AUD_OPT_INT:
 393             {
 394                 int *intp = opt->valp;
 395                 printf ("integer, %s = %d\n", state, *intp);
 396             }
 397             break;
 398
 399         case AUD_OPT_FMT:
 400             {
 401                 audfmt_e *fmtp = opt->valp;
 402                 printf (
 403                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 404                     state,
 405                     audio_audfmt_to_string (*fmtp)
 406                     );
 407             }
 408             break;
 409
 410         case AUD_OPT_STR:
 411             {
 412                 const char **strp = opt->valp;
 413                 printf ("string, %s = %s\n",
 414                         state,
 415                         *strp ? *strp : "(not set)");
 416             }
 417             break;
 418
 419         default:
 420             printf ("???\n");
 421             dolog ("Bad value tag for option %s_%s %d\n",
 422                    uprefix, opt->name, opt->tag);
 423             break;
 424         }
 425         printf ("    %s\n", opt->descr);
 426     }
 427
 428     qemu_free (uprefix);
 429 }
 430
 431 static void audio_process_options (const char *prefix,
 432                                    struct audio_option *opt)
 433 {
 434     char *optname;
 435     const char qemu_prefix[] = "QEMU_";
 436     size_t preflen, optlen;
 437
 438     if (audio_bug (AUDIO_FUNC, !prefix)) {
 439         dolog ("prefix = NULL\n");
 440         return;
 441     }
 442
 443     if (audio_bug (AUDIO_FUNC, !opt)) {
 444         dolog ("opt = NULL\n");
 445         return;
 446     }
 447
 448     preflen = strlen (prefix);
 449
 450     for (; opt->name; opt++) {
 451         size_t len, i;
 452         int def;
 453
 454         if (!opt->valp) {
 455             dolog ("Option value pointer for `%s' is not set\n",
 456                    opt->name);
 457             continue;
 458         }
 459
 460         len = strlen (opt->name);
 461         /* len of opt->name + len of prefix + size of qemu_prefix
 462          * (includes trailing zero) + zero + underscore (on behalf of
 463          * sizeof) */
 464         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 465         optname = qemu_malloc (optlen);
 466
 467         pstrcpy (optname, optlen, qemu_prefix);
 468
 469         /* copy while upper-casing, including trailing zero */
 470         for (i = 0; i <= preflen; ++i) {
 471             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 472         }
 473         pstrcat (optname, optlen, "_");
 474         pstrcat (optname, optlen, opt->name);
 475
 476         def = 1;
 477         switch (opt->tag) {
 478         case AUD_OPT_BOOL:
 479         case AUD_OPT_INT:
 480             {
 481                 int *intp = opt->valp;
 482                 *intp = audio_get_conf_int (optname, *intp, &def);
 483             }
 484             break;
 485
 486         case AUD_OPT_FMT:
 487             {
 488                 audfmt_e *fmtp = opt->valp;
 489                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 490             }
 491             break;
 492
 493         case AUD_OPT_STR:
 494             {
 495                 const char **strp = opt->valp;
 496                 *strp = audio_get_conf_str (optname, *strp, &def);
 497             }
 498             break;
 499
 500         default:
 501             dolog ("Bad value tag for option `%s' - %d\n",
 502                    optname, opt->tag);
 503             break;
 504         }
 505
 506         if (!opt->overriddenp) {
 507             opt->overriddenp = &opt->overridden;
 508         }
 509         *opt->overriddenp = !def;
 510         qemu_free (optname);
 511     }
 512 }
 513
 514 static void audio_print_settings (struct audsettings *as)
 515 {
 516     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 517
 518     switch (as->fmt) {
 519     case AUD_FMT_S8:
 520         AUD_log (NULL, "S8");
 521         break;
 522     case AUD_FMT_U8:
 523         AUD_log (NULL, "U8");
 524         break;
 525     case AUD_FMT_S16:
 526         AUD_log (NULL, "S16");
 527         break;
 528     case AUD_FMT_U16:
 529         AUD_log (NULL, "U16");
 530         break;
 531     case AUD_FMT_S32:
 532         AUD_log (NULL, "S32");
 533         break;
 534     case AUD_FMT_U32:
 535         AUD_log (NULL, "U32");
 536         break;
 537     default:
 538         AUD_log (NULL, "invalid(%d)", as->fmt);
 539         break;
 540     }
 541
 542     AUD_log (NULL, " endianness=");
 543     switch (as->endianness) {
 544     case 0:
 545         AUD_log (NULL, "little");
 546         break;
 547     case 1:
 548         AUD_log (NULL, "big");
 549         break;
 550     default:
 551         AUD_log (NULL, "invalid");
 552         break;
 553     }
 554     AUD_log (NULL, "\n");
 555 }
 556
 557 static int audio_validate_settings (struct audsettings *as)
 558 {
 559     int invalid;
 560
 561     invalid = as->nchannels != 1 && as->nchannels != 2;
 562     invalid |= as->endianness != 0 && as->endianness != 1;
 563
 564     switch (as->fmt) {
 565     case AUD_FMT_S8:
 566     case AUD_FMT_U8:
 567     case AUD_FMT_S16:
 568     case AUD_FMT_U16:
 569     case AUD_FMT_S32:
 570     case AUD_FMT_U32:
 571         break;
 572     default:
 573         invalid = 1;
 574         break;
 575     }
 576
 577     invalid |= as->freq <= 0;
 578     return invalid ? -1 : 0;
 579 }
 580
 581 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 582 {
 583     int bits = 8, sign = 0;
 584
 585     switch (as->fmt) {
 586     case AUD_FMT_S8:
 587         sign = 1;
 588     case AUD_FMT_U8:
 589         break;
 590
 591     case AUD_FMT_S16:
 592         sign = 1;
 593     case AUD_FMT_U16:
 594         bits = 16;
 595         break;
 596
 597     case AUD_FMT_S32:
 598         sign = 1;
 599     case AUD_FMT_U32:
 600         bits = 32;
 601         break;
 602     }
 603     return info->freq == as->freq
 604         && info->nchannels == as->nchannels
 605         && info->sign == sign
 606         && info->bits == bits
 607         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 608 }
 609
 610 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 611 {
 612     int bits = 8, sign = 0, shift = 0;
 613
 614     switch (as->fmt) {
 615     case AUD_FMT_S8:
 616         sign = 1;
 617     case AUD_FMT_U8:
 618         break;
 619
 620     case AUD_FMT_S16:
 621         sign = 1;
 622     case AUD_FMT_U16:
 623         bits = 16;
 624         shift = 1;
 625         break;
 626
 627     case AUD_FMT_S32:
 628         sign = 1;
 629     case AUD_FMT_U32:
 630         bits = 32;
 631         shift = 2;
 632         break;
 633     }
 634
 635     info->freq = as->freq;
 636     info->bits = bits;
 637     info->sign = sign;
 638     info->nchannels = as->nchannels;
 639     info->shift = (as->nchannels == 2) + shift;
 640     info->align = (1 << info->shift) - 1;
 641     info->bytes_per_second = info->freq << info->shift;
 642     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 643 }
 644
 645 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 646 {
 647     if (!len) {
 648         return;
 649     }
 650
 651     if (info->sign) {
 652         memset (buf, 0x00, len << info->shift);
 653     }
 654     else {
 655         switch (info->bits) {
 656         case 8:
 657             memset (buf, 0x80, len << info->shift);
 658             break;
 659
 660         case 16:
 661             {
 662                 int i;
 663                 uint16_t *p = buf;
 664                 int shift = info->nchannels - 1;
 665                 short s = INT16_MAX;
 666
 667                 if (info->swap_endianness) {
 668                     s = bswap16 (s);
 669                 }
 670
 671                 for (i = 0; i < len << shift; i++) {
 672                     p[i] = s;
 673                 }
 674             }
 675             break;
 676
 677         case 32:
 678             {
 679                 int i;
 680                 uint32_t *p = buf;
 681                 int shift = info->nchannels - 1;
 682                 int32_t s = INT32_MAX;
 683
 684                 if (info->swap_endianness) {
 685                     s = bswap32 (s);
 686                 }
 687
 688                 for (i = 0; i < len << shift; i++) {
 689                     p[i] = s;
 690                 }
 691             }
 692             break;
 693
 694         default:
 695             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 696                      info->bits);
 697             break;
 698         }
 699     }
 700 }
 701
 702 /*
 703  * Capture
 704  */
 705 static void noop_conv (struct st_sample *dst, const void *src,
 706                        int samples, struct mixeng_volume *vol)
 707 {
 708     (void) src;
 709     (void) dst;
 710     (void) samples;
 711     (void) vol;
 712 }
 713
 714 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 715     struct audsettings *as
 716     )
 717 {
 718     CaptureVoiceOut *cap;
 719     AudioState *s = &glob_audio_state;
 720
 721     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 722         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 723             return cap;
 724         }
 725     }
 726     return NULL;
 727 }
 728
 729 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 730 {
 731     struct capture_callback *cb;
 732
 733 #ifdef DEBUG_CAPTURE
 734     dolog ("notification %d sent\n", cmd);
 735 #endif
 736     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 737         cb->ops.notify (cb->opaque, cmd);
 738     }
 739 }
 740
 741 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 742 {
 743     if (cap->hw.enabled != enabled) {
 744         audcnotification_e cmd;
 745         cap->hw.enabled = enabled;
 746         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 747         audio_notify_capture (cap, cmd);
 748     }
 749 }
 750
 751 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 752 {
 753     HWVoiceOut *hw = &cap->hw;
 754     SWVoiceOut *sw;
 755     int enabled = 0;
 756
 757     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 758         if (sw->active) {
 759             enabled = 1;
 760             break;
 761         }
 762     }
 763     audio_capture_maybe_changed (cap, enabled);
 764 }
 765
 766 static void audio_detach_capture (HWVoiceOut *hw)
 767 {
 768     SWVoiceCap *sc = hw->cap_head.lh_first;
 769
 770     while (sc) {
 771         SWVoiceCap *sc1 = sc->entries.le_next;
 772         SWVoiceOut *sw = &sc->sw;
 773         CaptureVoiceOut *cap = sc->cap;
 774         int was_active = sw->active;
 775
 776         if (sw->rate) {
 777             st_rate_stop (sw->rate);
 778             sw->rate = NULL;
 779         }
 780
 781         QLIST_REMOVE (sw, entries);
 782         QLIST_REMOVE (sc, entries);
 783         qemu_free (sc);
 784         if (was_active) {
 785             /* We have removed soft voice from the capture:
 786                this might have changed the overall status of the capture
 787                since this might have been the only active voice */
 788             audio_recalc_and_notify_capture (cap);
 789         }
 790         sc = sc1;
 791     }
 792 }
 793
 794 static int audio_attach_capture (HWVoiceOut *hw)
 795 {
 796     AudioState *s = &glob_audio_state;
 797     CaptureVoiceOut *cap;
 798
 799     audio_detach_capture (hw);
 800     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 801         SWVoiceCap *sc;
 802         SWVoiceOut *sw;
 803         HWVoiceOut *hw_cap = &cap->hw;
 804
 805         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 806         if (!sc) {
 807             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 808                    sizeof (*sc));
 809             return -1;
 810         }
 811
 812         sc->cap = cap;
 813         sw = &sc->sw;
 814         sw->hw = hw_cap;
 815         sw->info = hw->info;
 816         sw->empty = 1;
 817         sw->active = hw->enabled;
 818         sw->conv = noop_conv;
 819         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 820         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 821         if (!sw->rate) {
 822             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 823             qemu_free (sw);
 824             return -1;
 825         }
 826         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 827         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 828 #ifdef DEBUG_CAPTURE
 829         asprintf (&sw->name, "for %p %d,%d,%d",
 830                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 831         dolog ("Added %s active = %d\n", sw->name, sw->active);
 832 #endif
 833         if (sw->active) {
 834             audio_capture_maybe_changed (cap, 1);
 835         }
 836     }
 837     return 0;
 838 }
 839
 840 /*
 841  * Hard voice (capture)
 842  */
 843 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 844 {
 845     SWVoiceIn *sw;
 846     int m = hw->total_samples_captured;
 847
 848     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 849         if (sw->active) {
 850             m = audio_MIN (m, sw->total_hw_samples_acquired);
 851         }
 852     }
 853     return m;
 854 }
 855
 856 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 857 {
 858     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 859     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 860         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 861         return 0;
 862     }
 863     return live;
 864 }
 865
 866 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 867                            int live, int pending)
 868 {
 869     int left = hw->samples - pending;
 870     int len = audio_MIN (left, live);
 871     int clipped = 0;
 872
 873     while (len) {
 874         struct st_sample *src = hw->mix_buf + hw->rpos;
 875         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 876         int samples_till_end_of_buf = hw->samples - hw->rpos;
 877         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 878
 879         hw->clip (dst, src, samples_to_clip);
 880
 881         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 882         len -= samples_to_clip;
 883         clipped += samples_to_clip;
 884     }
 885     return clipped;
 886 }
 887
 888 /*
 889  * Soft voice (capture)
 890  */
 891 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 892 {
 893     HWVoiceIn *hw = sw->hw;
 894     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 895     int rpos;
 896
 897     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 898         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 899         return 0;
 900     }
 901
 902     rpos = hw->wpos - live;
 903     if (rpos >= 0) {
 904         return rpos;
 905     }
 906     else {
 907         return hw->samples + rpos;
 908     }
 909 }
 910
 911 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 912 {
 913     HWVoiceIn *hw = sw->hw;
 914     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 915     struct st_sample *src, *dst = sw->buf;
 916
 917     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 918
 919     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 920     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 921         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 922         return 0;
 923     }
 924
 925     samples = size >> sw->info.shift;
 926     if (!live) {
 927         return 0;
 928     }
 929
 930     swlim = (live * sw->ratio) >> 32;
 931     swlim = audio_MIN (swlim, samples);
 932
 933     while (swlim) {
 934         src = hw->conv_buf + rpos;
 935         isamp = hw->wpos - rpos;
 936         /* XXX: <= ? */
 937         if (isamp <= 0) {
 938             isamp = hw->samples - rpos;
 939         }
 940
 941         if (!isamp) {
 942             break;
 943         }
 944         osamp = swlim;
 945
 946         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 947             dolog ("osamp=%d\n", osamp);
 948             return 0;
 949         }
 950
 951         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 952         swlim -= osamp;
 953         rpos = (rpos + isamp) % hw->samples;
 954         dst += osamp;
 955         ret += osamp;
 956         total += isamp;
 957     }
 958
 959     sw->clip (buf, sw->buf, ret);
 960     sw->total_hw_samples_acquired += total;
 961     return ret << sw->info.shift;
 962 }
 963
 964 /*
 965  * Hard voice (playback)
 966  */
 967 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 968 {
 969     SWVoiceOut *sw;
 970     int m = INT_MAX;
 971     int nb_live = 0;
 972
 973     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 974         if (sw->active || !sw->empty) {
 975             m = audio_MIN (m, sw->total_hw_samples_mixed);
 976             nb_live += 1;
 977         }
 978     }
 979
 980     *nb_livep = nb_live;
 981     return m;
 982 }
 983
 984 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 985 {
 986     int smin;
 987     int nb_live1;
 988
 989     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 990     if (nb_live) {
 991         *nb_live = nb_live1;
 992     }
 993
 994     if (nb_live1) {
 995         int live = smin;
 996
 997         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 998             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 999             return 0;
1000         }
1001         return live;
1002     }
1003     return 0;
1004 }
1005
1006 /*
1007  * Soft voice (playback)
1008  */
1009 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1010 {
1011     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1012     int ret = 0, pos = 0, total = 0;
1013
1014     if (!sw) {
1015         return size;
1016     }
1017
1018     hwsamples = sw->hw->samples;
1019
1020     live = sw->total_hw_samples_mixed;
1021     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1022         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1023         return 0;
1024     }
1025
1026     if (live == hwsamples) {
1027 #ifdef DEBUG_OUT
1028         dolog ("%s is full %d\n", sw->name, live);
1029 #endif
1030         return 0;
1031     }
1032
1033     wpos = (sw->hw->rpos + live) % hwsamples;
1034     samples = size >> sw->info.shift;
1035
1036     dead = hwsamples - live;
1037     swlim = ((int64_t) dead << 32) / sw->ratio;
1038     swlim = audio_MIN (swlim, samples);
1039     if (swlim) {
1040         sw->conv (sw->buf, buf, swlim, &sw->vol);
1041     }
1042
1043     while (swlim) {
1044         dead = hwsamples - live;
1045         left = hwsamples - wpos;
1046         blck = audio_MIN (dead, left);
1047         if (!blck) {
1048             break;
1049         }
1050         isamp = swlim;
1051         osamp = blck;
1052         st_rate_flow_mix (
1053             sw->rate,
1054             sw->buf + pos,
1055             sw->hw->mix_buf + wpos,
1056             &isamp,
1057             &osamp
1058             );
1059         ret += isamp;
1060         swlim -= isamp;
1061         pos += isamp;
1062         live += osamp;
1063         wpos = (wpos + osamp) % hwsamples;
1064         total += osamp;
1065     }
1066
1067     sw->total_hw_samples_mixed += total;
1068     sw->empty = sw->total_hw_samples_mixed == 0;
1069
1070 #ifdef DEBUG_OUT
1071     dolog (
1072         "%s: write size %d ret %d total sw %d\n",
1073         SW_NAME (sw),
1074         size >> sw->info.shift,
1075         ret,
1076         sw->total_hw_samples_mixed
1077         );
1078 #endif
1079
1080     return ret << sw->info.shift;
1081 }
1082
1083 #ifdef DEBUG_AUDIO
1084 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1085 {
1086     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1087            cap, info->bits, info->sign, info->freq, info->nchannels);
1088 }
1089 #endif
1090
1091 #define DAC
1092 #include "audio_template.h"
1093 #undef DAC
1094 #include "audio_template.h"
1095
1096 /*
1097  * Timer
1098  */
1099 static int audio_is_timer_needed (void)
1100 {
1101     HWVoiceIn *hwi = NULL;
1102     HWVoiceOut *hwo = NULL;
1103
1104     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1105         if (!hwo->poll_mode) return 1;
1106     }
1107     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1108         if (!hwi->poll_mode) return 1;
1109     }
1110     return 0;
1111 }
1112
1113 static void audio_reset_timer (AudioState *s)
1114 {
1115     if (audio_is_timer_needed ()) {
1116         qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
1117     }
1118     else {
1119         qemu_del_timer (s->ts);
1120     }
1121 }
1122
1123 static void audio_timer (void *opaque)
1124 {
1125     audio_run ("timer");
1126     audio_reset_timer (opaque);
1127 }
1128
1129 /*
1130  * Public API
1131  */
1132 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1133 {
1134     int bytes;
1135
1136     if (!sw) {
1137         /* XXX: Consider options */
1138         return size;
1139     }
1140
1141     if (!sw->hw->enabled) {
1142         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1143         return 0;
1144     }
1145
1146     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1147     return bytes;
1148 }
1149
1150 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1151 {
1152     int bytes;
1153
1154     if (!sw) {
1155         /* XXX: Consider options */
1156         return size;
1157     }
1158
1159     if (!sw->hw->enabled) {
1160         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1161         return 0;
1162     }
1163
1164     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1165     return bytes;
1166 }
1167
1168 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1169 {
1170     return sw->hw->samples << sw->hw->info.shift;
1171 }
1172
1173 void AUD_set_active_out (SWVoiceOut *sw, int on)
1174 {
1175     HWVoiceOut *hw;
1176
1177     if (!sw) {
1178         return;
1179     }
1180
1181     hw = sw->hw;
1182     if (sw->active != on) {
1183         AudioState *s = &glob_audio_state;
1184         SWVoiceOut *temp_sw;
1185         SWVoiceCap *sc;
1186
1187         if (on) {
1188             hw->pending_disable = 0;
1189             if (!hw->enabled) {
1190                 hw->enabled = 1;
1191                 if (s->vm_running) {
1192                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1193                     audio_reset_timer (s);
1194                 }
1195             }
1196         }
1197         else {
1198             if (hw->enabled) {
1199                 int nb_active = 0;
1200
1201                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1202                      temp_sw = temp_sw->entries.le_next) {
1203                     nb_active += temp_sw->active != 0;
1204                 }
1205
1206                 hw->pending_disable = nb_active == 1;
1207             }
1208         }
1209
1210         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1211             sc->sw.active = hw->enabled;
1212             if (hw->enabled) {
1213                 audio_capture_maybe_changed (sc->cap, 1);
1214             }
1215         }
1216         sw->active = on;
1217     }
1218 }
1219
1220 void AUD_set_active_in (SWVoiceIn *sw, int on)
1221 {
1222     HWVoiceIn *hw;
1223
1224     if (!sw) {
1225         return;
1226     }
1227
1228     hw = sw->hw;
1229     if (sw->active != on) {
1230         AudioState *s = &glob_audio_state;
1231         SWVoiceIn *temp_sw;
1232
1233         if (on) {
1234             if (!hw->enabled) {
1235                 hw->enabled = 1;
1236                 if (s->vm_running) {
1237                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1238                     audio_reset_timer (s);
1239                 }
1240             }
1241             sw->total_hw_samples_acquired = hw->total_samples_captured;
1242         }
1243         else {
1244             if (hw->enabled) {
1245                 int nb_active = 0;
1246
1247                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1248                      temp_sw = temp_sw->entries.le_next) {
1249                     nb_active += temp_sw->active != 0;
1250                 }
1251
1252                 if (nb_active == 1) {
1253                     hw->enabled = 0;
1254                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1255                 }
1256             }
1257         }
1258         sw->active = on;
1259     }
1260 }
1261
1262 static int audio_get_avail (SWVoiceIn *sw)
1263 {
1264     int live;
1265
1266     if (!sw) {
1267         return 0;
1268     }
1269
1270     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1271     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1272         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1273         return 0;
1274     }
1275
1276     ldebug (
1277         "%s: get_avail live %d ret %" PRId64 "\n",
1278         SW_NAME (sw),
1279         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1280         );
1281
1282     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1283 }
1284
1285 static int audio_get_free (SWVoiceOut *sw)
1286 {
1287     int live, dead;
1288
1289     if (!sw) {
1290         return 0;
1291     }
1292
1293     live = sw->total_hw_samples_mixed;
1294
1295     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1296         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1297         return 0;
1298     }
1299
1300     dead = sw->hw->samples - live;
1301
1302 #ifdef DEBUG_OUT
1303     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1304            SW_NAME (sw),
1305            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1306 #endif
1307
1308     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1309 }
1310
1311 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1312 {
1313     int n;
1314
1315     if (hw->enabled) {
1316         SWVoiceCap *sc;
1317
1318         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1319             SWVoiceOut *sw = &sc->sw;
1320             int rpos2 = rpos;
1321
1322             n = samples;
1323             while (n) {
1324                 int till_end_of_hw = hw->samples - rpos2;
1325                 int to_write = audio_MIN (till_end_of_hw, n);
1326                 int bytes = to_write << hw->info.shift;
1327                 int written;
1328
1329                 sw->buf = hw->mix_buf + rpos2;
1330                 written = audio_pcm_sw_write (sw, NULL, bytes);
1331                 if (written - bytes) {
1332                     dolog ("Could not mix %d bytes into a capture "
1333                            "buffer, mixed %d\n",
1334                            bytes, written);
1335                     break;
1336                 }
1337                 n -= to_write;
1338                 rpos2 = (rpos2 + to_write) % hw->samples;
1339             }
1340         }
1341     }
1342
1343     n = audio_MIN (samples, hw->samples - rpos);
1344     mixeng_clear (hw->mix_buf + rpos, n);
1345     mixeng_clear (hw->mix_buf, samples - n);
1346 }
1347
1348 static void audio_run_out (AudioState *s)
1349 {
1350     HWVoiceOut *hw = NULL;
1351     SWVoiceOut *sw;
1352
1353     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1354         int played;
1355         int live, free, nb_live, cleanup_required, prev_rpos;
1356
1357         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1358         if (!nb_live) {
1359             live = 0;
1360         }
1361
1362         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1363             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1364             continue;
1365         }
1366
1367         if (hw->pending_disable && !nb_live) {
1368             SWVoiceCap *sc;
1369 #ifdef DEBUG_OUT
1370             dolog ("Disabling voice\n");
1371 #endif
1372             hw->enabled = 0;
1373             hw->pending_disable = 0;
1374             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1375             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1376                 sc->sw.active = 0;
1377                 audio_recalc_and_notify_capture (sc->cap);
1378             }
1379             continue;
1380         }
1381
1382         if (!live) {
1383             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1384                 if (sw->active) {
1385                     free = audio_get_free (sw);
1386                     if (free > 0) {
1387                         sw->callback.fn (sw->callback.opaque, free);
1388                     }
1389                 }
1390             }
1391             continue;
1392         }
1393
1394         prev_rpos = hw->rpos;
1395         played = hw->pcm_ops->run_out (hw, live);
1396         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1397             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1398                    hw->rpos, hw->samples, played);
1399             hw->rpos = 0;
1400         }
1401
1402 #ifdef DEBUG_OUT
1403         dolog ("played=%d\n", played);
1404 #endif
1405
1406         if (played) {
1407             hw->ts_helper += played;
1408             audio_capture_mix_and_clear (hw, prev_rpos, played);
1409         }
1410
1411         cleanup_required = 0;
1412         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1413             if (!sw->active && sw->empty) {
1414                 continue;
1415             }
1416
1417             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1418                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1419                        played, sw->total_hw_samples_mixed);
1420                 played = sw->total_hw_samples_mixed;
1421             }
1422
1423             sw->total_hw_samples_mixed -= played;
1424
1425             if (!sw->total_hw_samples_mixed) {
1426                 sw->empty = 1;
1427                 cleanup_required |= !sw->active && !sw->callback.fn;
1428             }
1429
1430             if (sw->active) {
1431                 free = audio_get_free (sw);
1432                 if (free > 0) {
1433                     sw->callback.fn (sw->callback.opaque, free);
1434                 }
1435             }
1436         }
1437
1438         if (cleanup_required) {
1439             SWVoiceOut *sw1;
1440
1441             sw = hw->sw_head.lh_first;
1442             while (sw) {
1443                 sw1 = sw->entries.le_next;
1444                 if (!sw->active && !sw->callback.fn) {
1445 #ifdef DEBUG_PLIVE
1446                     dolog ("Finishing with old voice\n");
1447 #endif
1448                     audio_close_out (sw);
1449                 }
1450                 sw = sw1;
1451             }
1452         }
1453     }
1454 }
1455
1456 static void audio_run_in (AudioState *s)
1457 {
1458     HWVoiceIn *hw = NULL;
1459
1460     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1461         SWVoiceIn *sw;
1462         int captured, min;
1463
1464         captured = hw->pcm_ops->run_in (hw);
1465
1466         min = audio_pcm_hw_find_min_in (hw);
1467         hw->total_samples_captured += captured - min;
1468         hw->ts_helper += captured;
1469
1470         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1471             sw->total_hw_samples_acquired -= min;
1472
1473             if (sw->active) {
1474                 int avail;
1475
1476                 avail = audio_get_avail (sw);
1477                 if (avail > 0) {
1478                     sw->callback.fn (sw->callback.opaque, avail);
1479                 }
1480             }
1481         }
1482     }
1483 }
1484
1485 static void audio_run_capture (AudioState *s)
1486 {
1487     CaptureVoiceOut *cap;
1488
1489     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1490         int live, rpos, captured;
1491         HWVoiceOut *hw = &cap->hw;
1492         SWVoiceOut *sw;
1493
1494         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1495         rpos = hw->rpos;
1496         while (live) {
1497             int left = hw->samples - rpos;
1498             int to_capture = audio_MIN (live, left);
1499             struct st_sample *src;
1500             struct capture_callback *cb;
1501
1502             src = hw->mix_buf + rpos;
1503             hw->clip (cap->buf, src, to_capture);
1504             mixeng_clear (src, to_capture);
1505
1506             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1507                 cb->ops.capture (cb->opaque, cap->buf,
1508                                  to_capture << hw->info.shift);
1509             }
1510             rpos = (rpos + to_capture) % hw->samples;
1511             live -= to_capture;
1512         }
1513         hw->rpos = rpos;
1514
1515         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1516             if (!sw->active && sw->empty) {
1517                 continue;
1518             }
1519
1520             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1521                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1522                        captured, sw->total_hw_samples_mixed);
1523                 captured = sw->total_hw_samples_mixed;
1524             }
1525
1526             sw->total_hw_samples_mixed -= captured;
1527             sw->empty = sw->total_hw_samples_mixed == 0;
1528         }
1529     }
1530 }
1531
1532 void audio_run (const char *msg)
1533 {
1534     AudioState *s = &glob_audio_state;
1535
1536     audio_run_out (s);
1537     audio_run_in (s);
1538     audio_run_capture (s);
1539 #ifdef DEBUG_POLL
1540     {
1541         static double prevtime;
1542         double currtime;
1543         struct timeval tv;
1544
1545         if (gettimeofday (&tv, NULL)) {
1546             perror ("audio_run: gettimeofday");
1547             return;
1548         }
1549
1550         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1551         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1552         prevtime = currtime;
1553     }
1554 #endif
1555 }
1556
1557 static struct audio_option audio_options[] = {
1558     /* DAC */
1559     {
1560         .name  = "DAC_FIXED_SETTINGS",
1561         .tag   = AUD_OPT_BOOL,
1562         .valp  = &conf.fixed_out.enabled,
1563         .descr = "Use fixed settings for host DAC"
1564     },
1565     {
1566         .name  = "DAC_FIXED_FREQ",
1567         .tag   = AUD_OPT_INT,
1568         .valp  = &conf.fixed_out.settings.freq,
1569         .descr = "Frequency for fixed host DAC"
1570     },
1571     {
1572         .name  = "DAC_FIXED_FMT",
1573         .tag   = AUD_OPT_FMT,
1574         .valp  = &conf.fixed_out.settings.fmt,
1575         .descr = "Format for fixed host DAC"
1576     },
1577     {
1578         .name  = "DAC_FIXED_CHANNELS",
1579         .tag   = AUD_OPT_INT,
1580         .valp  = &conf.fixed_out.settings.nchannels,
1581         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1582     },
1583     {
1584         .name  = "DAC_VOICES",
1585         .tag   = AUD_OPT_INT,
1586         .valp  = &conf.fixed_out.nb_voices,
1587         .descr = "Number of voices for DAC"
1588     },
1589     {
1590         .name  = "DAC_TRY_POLL",
1591         .tag   = AUD_OPT_BOOL,
1592         .valp  = &conf.try_poll_out,
1593         .descr = "Attempt using poll mode for DAC"
1594     },
1595     /* ADC */
1596     {
1597         .name  = "ADC_FIXED_SETTINGS",
1598         .tag   = AUD_OPT_BOOL,
1599         .valp  = &conf.fixed_in.enabled,
1600         .descr = "Use fixed settings for host ADC"
1601     },
1602     {
1603         .name  = "ADC_FIXED_FREQ",
1604         .tag   = AUD_OPT_INT,
1605         .valp  = &conf.fixed_in.settings.freq,
1606         .descr = "Frequency for fixed host ADC"
1607     },
1608     {
1609         .name  = "ADC_FIXED_FMT",
1610         .tag   = AUD_OPT_FMT,
1611         .valp  = &conf.fixed_in.settings.fmt,
1612         .descr = "Format for fixed host ADC"
1613     },
1614     {
1615         .name  = "ADC_FIXED_CHANNELS",
1616         .tag   = AUD_OPT_INT,
1617         .valp  = &conf.fixed_in.settings.nchannels,
1618         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1619     },
1620     {
1621         .name  = "ADC_VOICES",
1622         .tag   = AUD_OPT_INT,
1623         .valp  = &conf.fixed_in.nb_voices,
1624         .descr = "Number of voices for ADC"
1625     },
1626     {
1627         .name  = "ADC_TRY_POLL",
1628         .tag   = AUD_OPT_BOOL,
1629         .valp  = &conf.try_poll_in,
1630         .descr = "Attempt using poll mode for ADC"
1631     },
1632     /* Misc */
1633     {
1634         .name  = "TIMER_PERIOD",
1635         .tag   = AUD_OPT_INT,
1636         .valp  = &conf.period.hertz,
1637         .descr = "Timer period in HZ (0 - use lowest possible)"
1638     },
1639     {
1640         .name  = "PLIVE",
1641         .tag   = AUD_OPT_BOOL,
1642         .valp  = &conf.plive,
1643         .descr = "(undocumented)"
1644     },
1645     {
1646         .name  = "LOG_TO_MONITOR",
1647         .tag   = AUD_OPT_BOOL,
1648         .valp  = &conf.log_to_monitor,
1649         .descr = "Print logging messages to monitor instead of stderr"
1650     },
1651     { /* End of list */ }
1652 };
1653
1654 static void audio_pp_nb_voices (const char *typ, int nb)
1655 {
1656     switch (nb) {
1657     case 0:
1658         printf ("Does not support %s\n", typ);
1659         break;
1660     case 1:
1661         printf ("One %s voice\n", typ);
1662         break;
1663     case INT_MAX:
1664         printf ("Theoretically supports many %s voices\n", typ);
1665         break;
1666     default:
1667         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1668         break;
1669     }
1670
1671 }
1672
1673 void AUD_help (void)
1674 {
1675     size_t i;
1676
1677     audio_process_options ("AUDIO", audio_options);
1678     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1679         struct audio_driver *d = drvtab[i];
1680         if (d->options) {
1681             audio_process_options (d->name, d->options);
1682         }
1683     }
1684
1685     printf ("Audio options:\n");
1686     audio_print_options ("AUDIO", audio_options);
1687     printf ("\n");
1688
1689     printf ("Available drivers:\n");
1690
1691     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1692         struct audio_driver *d = drvtab[i];
1693
1694         printf ("Name: %s\n", d->name);
1695         printf ("Description: %s\n", d->descr);
1696
1697         audio_pp_nb_voices ("playback", d->max_voices_out);
1698         audio_pp_nb_voices ("capture", d->max_voices_in);
1699
1700         if (d->options) {
1701             printf ("Options:\n");
1702             audio_print_options (d->name, d->options);
1703         }
1704         else {
1705             printf ("No options\n");
1706         }
1707         printf ("\n");
1708     }
1709
1710     printf (
1711         "Options are settable through environment variables.\n"
1712         "Example:\n"
1713 #ifdef _WIN32
1714         "  set QEMU_AUDIO_DRV=wav\n"
1715         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1716 #else
1717         "  export QEMU_AUDIO_DRV=wav\n"
1718         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1719         "(for csh replace export with setenv in the above)\n"
1720 #endif
1721         "  qemu ...\n\n"
1722         );
1723 }
1724
1725 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1726 {
1727     if (drv->options) {
1728         audio_process_options (drv->name, drv->options);
1729     }
1730     s->drv_opaque = drv->init ();
1731
1732     if (s->drv_opaque) {
1733         audio_init_nb_voices_out (drv);
1734         audio_init_nb_voices_in (drv);
1735         s->drv = drv;
1736         return 0;
1737     }
1738     else {
1739         dolog ("Could not init `%s' audio driver\n", drv->name);
1740         return -1;
1741     }
1742 }
1743
1744 static void audio_vm_change_state_handler (void *opaque, int running,
1745                                            int reason)
1746 {
1747     AudioState *s = opaque;
1748     HWVoiceOut *hwo = NULL;
1749     HWVoiceIn *hwi = NULL;
1750     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1751
1752     s->vm_running = running;
1753     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1754         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1755     }
1756
1757     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1758         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1759     }
1760     audio_reset_timer (s);
1761 }
1762
1763 static void audio_atexit (void)
1764 {
1765     AudioState *s = &glob_audio_state;
1766     HWVoiceOut *hwo = NULL;
1767     HWVoiceIn *hwi = NULL;
1768
1769     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1770         SWVoiceCap *sc;
1771
1772         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1773         hwo->pcm_ops->fini_out (hwo);
1774
1775         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1776             CaptureVoiceOut *cap = sc->cap;
1777             struct capture_callback *cb;
1778
1779             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1780                 cb->ops.destroy (cb->opaque);
1781             }
1782         }
1783     }
1784
1785     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1786         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1787         hwi->pcm_ops->fini_in (hwi);
1788     }
1789
1790     if (s->drv) {
1791         s->drv->fini (s->drv_opaque);
1792     }
1793 }
1794
1795 static const VMStateDescription vmstate_audio = {
1796     .name = "audio",
1797     .version_id = 1,
1798     .minimum_version_id = 1,
1799     .minimum_version_id_old = 1,
1800     .fields      = (VMStateField []) {
1801         VMSTATE_END_OF_LIST()
1802     }
1803 };
1804
1805 static void audio_init (void)
1806 {
1807     size_t i;
1808     int done = 0;
1809     const char *drvname;
1810     VMChangeStateEntry *e;
1811     AudioState *s = &glob_audio_state;
1812
1813     if (s->drv) {
1814         return;
1815     }
1816
1817     QLIST_INIT (&s->hw_head_out);
1818     QLIST_INIT (&s->hw_head_in);
1819     QLIST_INIT (&s->cap_head);
1820     atexit (audio_atexit);
1821
1822     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1823     if (!s->ts) {
1824         hw_error("Could not create audio timer\n");
1825     }
1826
1827     audio_process_options ("AUDIO", audio_options);
1828
1829     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1830     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1831
1832     if (s->nb_hw_voices_out <= 0) {
1833         dolog ("Bogus number of playback voices %d, setting to 1\n",
1834                s->nb_hw_voices_out);
1835         s->nb_hw_voices_out = 1;
1836     }
1837
1838     if (s->nb_hw_voices_in <= 0) {
1839         dolog ("Bogus number of capture voices %d, setting to 0\n",
1840                s->nb_hw_voices_in);
1841         s->nb_hw_voices_in = 0;
1842     }
1843
1844     {
1845         int def;
1846         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1847     }
1848
1849     if (drvname) {
1850         int found = 0;
1851
1852         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1853             if (!strcmp (drvname, drvtab[i]->name)) {
1854                 done = !audio_driver_init (s, drvtab[i]);
1855                 found = 1;
1856                 break;
1857             }
1858         }
1859
1860         if (!found) {
1861             dolog ("Unknown audio driver `%s'\n", drvname);
1862             dolog ("Run with -audio-help to list available drivers\n");
1863         }
1864     }
1865
1866     if (!done) {
1867         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1868             if (drvtab[i]->can_be_default) {
1869                 done = !audio_driver_init (s, drvtab[i]);
1870             }
1871         }
1872     }
1873
1874     if (!done) {
1875         done = !audio_driver_init (s, &no_audio_driver);
1876         if (!done) {
1877             hw_error("Could not initialize audio subsystem\n");
1878         }
1879         else {
1880             dolog ("warning: Using timer based audio emulation\n");
1881         }
1882     }
1883
1884     if (conf.period.hertz <= 0) {
1885         if (conf.period.hertz < 0) {
1886             dolog ("warning: Timer period is negative - %d "
1887                    "treating as zero\n",
1888                    conf.period.hertz);
1889         }
1890         conf.period.ticks = 1;
1891     } else {
1892         conf.period.ticks =
1893             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1894     }
1895
1896     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1897     if (!e) {
1898         dolog ("warning: Could not register change state handler\n"
1899                "(Audio can continue looping even after stopping the VM)\n");
1900     }
1901
1902     QLIST_INIT (&s->card_head);
1903     vmstate_register (NULL, 0, &vmstate_audio, s);
1904 }
1905
1906 void AUD_register_card (const char *name, QEMUSoundCard *card)
1907 {
1908     audio_init ();
1909     card->name = qemu_strdup (name);
1910     memset (&card->entries, 0, sizeof (card->entries));
1911     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1912 }
1913
1914 void AUD_remove_card (QEMUSoundCard *card)
1915 {
1916     QLIST_REMOVE (card, entries);
1917     qemu_free (card->name);
1918 }
1919
1920
1921 CaptureVoiceOut *AUD_add_capture (
1922     struct audsettings *as,
1923     struct audio_capture_ops *ops,
1924     void *cb_opaque
1925     )
1926 {
1927     AudioState *s = &glob_audio_state;
1928     CaptureVoiceOut *cap;
1929     struct capture_callback *cb;
1930
1931     if (audio_validate_settings (as)) {
1932         dolog ("Invalid settings were passed when trying to add capture\n");
1933         audio_print_settings (as);
1934         goto err0;
1935     }
1936
1937     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1938     if (!cb) {
1939         dolog ("Could not allocate capture callback information, size %zu\n",
1940                sizeof (*cb));
1941         goto err0;
1942     }
1943     cb->ops = *ops;
1944     cb->opaque = cb_opaque;
1945
1946     cap = audio_pcm_capture_find_specific (as);
1947     if (cap) {
1948         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1949         return cap;
1950     }
1951     else {
1952         HWVoiceOut *hw;
1953         CaptureVoiceOut *cap;
1954
1955         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1956         if (!cap) {
1957             dolog ("Could not allocate capture voice, size %zu\n",
1958                    sizeof (*cap));
1959             goto err1;
1960         }
1961
1962         hw = &cap->hw;
1963         QLIST_INIT (&hw->sw_head);
1964         QLIST_INIT (&cap->cb_head);
1965
1966         /* XXX find a more elegant way */
1967         hw->samples = 4096 * 4;
1968         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1969                                     sizeof (struct st_sample));
1970         if (!hw->mix_buf) {
1971             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1972                    hw->samples);
1973             goto err2;
1974         }
1975
1976         audio_pcm_init_info (&hw->info, as);
1977
1978         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1979         if (!cap->buf) {
1980             dolog ("Could not allocate capture buffer "
1981                    "(%d samples, each %d bytes)\n",
1982                    hw->samples, 1 << hw->info.shift);
1983             goto err3;
1984         }
1985
1986         hw->clip = mixeng_clip
1987             [hw->info.nchannels == 2]
1988             [hw->info.sign]
1989             [hw->info.swap_endianness]
1990             [audio_bits_to_index (hw->info.bits)];
1991
1992         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1993         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1994
1995         hw = NULL;
1996         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1997             audio_attach_capture (hw);
1998         }
1999         return cap;
2000
2001     err3:
2002         qemu_free (cap->hw.mix_buf);
2003     err2:
2004         qemu_free (cap);
2005     err1:
2006         qemu_free (cb);
2007     err0:
2008         return NULL;
2009     }
2010 }
2011
2012 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2013 {
2014     struct capture_callback *cb;
2015
2016     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2017         if (cb->opaque == cb_opaque) {
2018             cb->ops.destroy (cb_opaque);
2019             QLIST_REMOVE (cb, entries);
2020             qemu_free (cb);
2021
2022             if (!cap->cb_head.lh_first) {
2023                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2024
2025                 while (sw) {
2026                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2027 #ifdef DEBUG_CAPTURE
2028                     dolog ("freeing %s\n", sw->name);
2029 #endif
2030
2031                     sw1 = sw->entries.le_next;
2032                     if (sw->rate) {
2033                         st_rate_stop (sw->rate);
2034                         sw->rate = NULL;
2035                     }
2036                     QLIST_REMOVE (sw, entries);
2037                     QLIST_REMOVE (sc, entries);
2038                     qemu_free (sc);
2039                     sw = sw1;
2040                 }
2041                 QLIST_REMOVE (cap, entries);
2042                 qemu_free (cap);
2043             }
2044             return;
2045         }
2046     }
2047 }
2048
2049 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2050 {
2051     if (sw) {
2052         sw->vol.mute = mute;
2053         sw->vol.l = nominal_volume.l * lvol / 255;
2054         sw->vol.r = nominal_volume.r * rvol / 255;
2055     }
2056 }
2057
2058 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2059 {
2060     if (sw) {
2061         sw->vol.mute = mute;
2062         sw->vol.l = nominal_volume.l * lvol / 255;
2063         sw->vol.r = nominal_volume.r * rvol / 255;
2064     }
2065 }