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 const 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, int samples)
 706 {
 707     (void) src;
 708     (void) dst;
 709     (void) samples;
 710 }
 711
 712 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 713     struct audsettings *as
 714     )
 715 {
 716     CaptureVoiceOut *cap;
 717     AudioState *s = &glob_audio_state;
 718
 719     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 720         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 721             return cap;
 722         }
 723     }
 724     return NULL;
 725 }
 726
 727 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 728 {
 729     struct capture_callback *cb;
 730
 731 #ifdef DEBUG_CAPTURE
 732     dolog ("notification %d sent\n", cmd);
 733 #endif
 734     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 735         cb->ops.notify (cb->opaque, cmd);
 736     }
 737 }
 738
 739 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 740 {
 741     if (cap->hw.enabled != enabled) {
 742         audcnotification_e cmd;
 743         cap->hw.enabled = enabled;
 744         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 745         audio_notify_capture (cap, cmd);
 746     }
 747 }
 748
 749 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 750 {
 751     HWVoiceOut *hw = &cap->hw;
 752     SWVoiceOut *sw;
 753     int enabled = 0;
 754
 755     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 756         if (sw->active) {
 757             enabled = 1;
 758             break;
 759         }
 760     }
 761     audio_capture_maybe_changed (cap, enabled);
 762 }
 763
 764 static void audio_detach_capture (HWVoiceOut *hw)
 765 {
 766     SWVoiceCap *sc = hw->cap_head.lh_first;
 767
 768     while (sc) {
 769         SWVoiceCap *sc1 = sc->entries.le_next;
 770         SWVoiceOut *sw = &sc->sw;
 771         CaptureVoiceOut *cap = sc->cap;
 772         int was_active = sw->active;
 773
 774         if (sw->rate) {
 775             st_rate_stop (sw->rate);
 776             sw->rate = NULL;
 777         }
 778
 779         QLIST_REMOVE (sw, entries);
 780         QLIST_REMOVE (sc, entries);
 781         qemu_free (sc);
 782         if (was_active) {
 783             /* We have removed soft voice from the capture:
 784                this might have changed the overall status of the capture
 785                since this might have been the only active voice */
 786             audio_recalc_and_notify_capture (cap);
 787         }
 788         sc = sc1;
 789     }
 790 }
 791
 792 static int audio_attach_capture (HWVoiceOut *hw)
 793 {
 794     AudioState *s = &glob_audio_state;
 795     CaptureVoiceOut *cap;
 796
 797     audio_detach_capture (hw);
 798     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 799         SWVoiceCap *sc;
 800         SWVoiceOut *sw;
 801         HWVoiceOut *hw_cap = &cap->hw;
 802
 803         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 804         if (!sc) {
 805             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 806                    sizeof (*sc));
 807             return -1;
 808         }
 809
 810         sc->cap = cap;
 811         sw = &sc->sw;
 812         sw->hw = hw_cap;
 813         sw->info = hw->info;
 814         sw->empty = 1;
 815         sw->active = hw->enabled;
 816         sw->conv = noop_conv;
 817         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 818         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 819         if (!sw->rate) {
 820             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 821             qemu_free (sw);
 822             return -1;
 823         }
 824         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 825         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 826 #ifdef DEBUG_CAPTURE
 827         asprintf (&sw->name, "for %p %d,%d,%d",
 828                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 829         dolog ("Added %s active = %d\n", sw->name, sw->active);
 830 #endif
 831         if (sw->active) {
 832             audio_capture_maybe_changed (cap, 1);
 833         }
 834     }
 835     return 0;
 836 }
 837
 838 /*
 839  * Hard voice (capture)
 840  */
 841 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 842 {
 843     SWVoiceIn *sw;
 844     int m = hw->total_samples_captured;
 845
 846     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 847         if (sw->active) {
 848             m = audio_MIN (m, sw->total_hw_samples_acquired);
 849         }
 850     }
 851     return m;
 852 }
 853
 854 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 855 {
 856     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 857     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 858         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 859         return 0;
 860     }
 861     return live;
 862 }
 863
 864 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 865                            int live, int pending)
 866 {
 867     int left = hw->samples - pending;
 868     int len = audio_MIN (left, live);
 869     int clipped = 0;
 870
 871     while (len) {
 872         struct st_sample *src = hw->mix_buf + hw->rpos;
 873         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 874         int samples_till_end_of_buf = hw->samples - hw->rpos;
 875         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 876
 877         hw->clip (dst, src, samples_to_clip);
 878
 879         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 880         len -= samples_to_clip;
 881         clipped += samples_to_clip;
 882     }
 883     return clipped;
 884 }
 885
 886 /*
 887  * Soft voice (capture)
 888  */
 889 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 890 {
 891     HWVoiceIn *hw = sw->hw;
 892     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 893     int rpos;
 894
 895     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 896         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 897         return 0;
 898     }
 899
 900     rpos = hw->wpos - live;
 901     if (rpos >= 0) {
 902         return rpos;
 903     }
 904     else {
 905         return hw->samples + rpos;
 906     }
 907 }
 908
 909 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 910 {
 911     HWVoiceIn *hw = sw->hw;
 912     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 913     struct st_sample *src, *dst = sw->buf;
 914
 915     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 916
 917     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 918     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 919         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 920         return 0;
 921     }
 922
 923     samples = size >> sw->info.shift;
 924     if (!live) {
 925         return 0;
 926     }
 927
 928     swlim = (live * sw->ratio) >> 32;
 929     swlim = audio_MIN (swlim, samples);
 930
 931     while (swlim) {
 932         src = hw->conv_buf + rpos;
 933         isamp = hw->wpos - rpos;
 934         /* XXX: <= ? */
 935         if (isamp <= 0) {
 936             isamp = hw->samples - rpos;
 937         }
 938
 939         if (!isamp) {
 940             break;
 941         }
 942         osamp = swlim;
 943
 944         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 945             dolog ("osamp=%d\n", osamp);
 946             return 0;
 947         }
 948
 949         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 950         swlim -= osamp;
 951         rpos = (rpos + isamp) % hw->samples;
 952         dst += osamp;
 953         ret += osamp;
 954         total += isamp;
 955     }
 956
 957     mixeng_volume (sw->buf, ret, &sw->vol);
 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);
1041         mixeng_volume (sw->buf, swlim, &sw->vol);
1042     }
1043
1044     while (swlim) {
1045         dead = hwsamples - live;
1046         left = hwsamples - wpos;
1047         blck = audio_MIN (dead, left);
1048         if (!blck) {
1049             break;
1050         }
1051         isamp = swlim;
1052         osamp = blck;
1053         st_rate_flow_mix (
1054             sw->rate,
1055             sw->buf + pos,
1056             sw->hw->mix_buf + wpos,
1057             &isamp,
1058             &osamp
1059             );
1060         ret += isamp;
1061         swlim -= isamp;
1062         pos += isamp;
1063         live += osamp;
1064         wpos = (wpos + osamp) % hwsamples;
1065         total += osamp;
1066     }
1067
1068     sw->total_hw_samples_mixed += total;
1069     sw->empty = sw->total_hw_samples_mixed == 0;
1070
1071 #ifdef DEBUG_OUT
1072     dolog (
1073         "%s: write size %d ret %d total sw %d\n",
1074         SW_NAME (sw),
1075         size >> sw->info.shift,
1076         ret,
1077         sw->total_hw_samples_mixed
1078         );
1079 #endif
1080
1081     return ret << sw->info.shift;
1082 }
1083
1084 #ifdef DEBUG_AUDIO
1085 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1086 {
1087     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1088            cap, info->bits, info->sign, info->freq, info->nchannels);
1089 }
1090 #endif
1091
1092 #define DAC
1093 #include "audio_template.h"
1094 #undef DAC
1095 #include "audio_template.h"
1096
1097 /*
1098  * Timer
1099  */
1100 static int audio_is_timer_needed (void)
1101 {
1102     HWVoiceIn *hwi = NULL;
1103     HWVoiceOut *hwo = NULL;
1104
1105     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1106         if (!hwo->poll_mode) return 1;
1107     }
1108     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1109         if (!hwi->poll_mode) return 1;
1110     }
1111     return 0;
1112 }
1113
1114 static void audio_reset_timer (AudioState *s)
1115 {
1116     if (audio_is_timer_needed ()) {
1117         qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1118     }
1119     else {
1120         qemu_del_timer (s->ts);
1121     }
1122 }
1123
1124 static void audio_timer (void *opaque)
1125 {
1126     audio_run ("timer");
1127     audio_reset_timer (opaque);
1128 }
1129
1130 /*
1131  * Public API
1132  */
1133 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1134 {
1135     int bytes;
1136
1137     if (!sw) {
1138         /* XXX: Consider options */
1139         return size;
1140     }
1141
1142     if (!sw->hw->enabled) {
1143         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1144         return 0;
1145     }
1146
1147     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1148     return bytes;
1149 }
1150
1151 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1152 {
1153     int bytes;
1154
1155     if (!sw) {
1156         /* XXX: Consider options */
1157         return size;
1158     }
1159
1160     if (!sw->hw->enabled) {
1161         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1162         return 0;
1163     }
1164
1165     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1166     return bytes;
1167 }
1168
1169 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1170 {
1171     return sw->hw->samples << sw->hw->info.shift;
1172 }
1173
1174 void AUD_set_active_out (SWVoiceOut *sw, int on)
1175 {
1176     HWVoiceOut *hw;
1177
1178     if (!sw) {
1179         return;
1180     }
1181
1182     hw = sw->hw;
1183     if (sw->active != on) {
1184         AudioState *s = &glob_audio_state;
1185         SWVoiceOut *temp_sw;
1186         SWVoiceCap *sc;
1187
1188         if (on) {
1189             hw->pending_disable = 0;
1190             if (!hw->enabled) {
1191                 hw->enabled = 1;
1192                 if (s->vm_running) {
1193                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1194                     audio_reset_timer (s);
1195                 }
1196             }
1197         }
1198         else {
1199             if (hw->enabled) {
1200                 int nb_active = 0;
1201
1202                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1203                      temp_sw = temp_sw->entries.le_next) {
1204                     nb_active += temp_sw->active != 0;
1205                 }
1206
1207                 hw->pending_disable = nb_active == 1;
1208             }
1209         }
1210
1211         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1212             sc->sw.active = hw->enabled;
1213             if (hw->enabled) {
1214                 audio_capture_maybe_changed (sc->cap, 1);
1215             }
1216         }
1217         sw->active = on;
1218     }
1219 }
1220
1221 void AUD_set_active_in (SWVoiceIn *sw, int on)
1222 {
1223     HWVoiceIn *hw;
1224
1225     if (!sw) {
1226         return;
1227     }
1228
1229     hw = sw->hw;
1230     if (sw->active != on) {
1231         AudioState *s = &glob_audio_state;
1232         SWVoiceIn *temp_sw;
1233
1234         if (on) {
1235             if (!hw->enabled) {
1236                 hw->enabled = 1;
1237                 if (s->vm_running) {
1238                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1239                     audio_reset_timer (s);
1240                 }
1241             }
1242             sw->total_hw_samples_acquired = hw->total_samples_captured;
1243         }
1244         else {
1245             if (hw->enabled) {
1246                 int nb_active = 0;
1247
1248                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1249                      temp_sw = temp_sw->entries.le_next) {
1250                     nb_active += temp_sw->active != 0;
1251                 }
1252
1253                 if (nb_active == 1) {
1254                     hw->enabled = 0;
1255                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1256                 }
1257             }
1258         }
1259         sw->active = on;
1260     }
1261 }
1262
1263 static int audio_get_avail (SWVoiceIn *sw)
1264 {
1265     int live;
1266
1267     if (!sw) {
1268         return 0;
1269     }
1270
1271     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1272     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1273         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1274         return 0;
1275     }
1276
1277     ldebug (
1278         "%s: get_avail live %d ret %" PRId64 "\n",
1279         SW_NAME (sw),
1280         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1281         );
1282
1283     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1284 }
1285
1286 static int audio_get_free (SWVoiceOut *sw)
1287 {
1288     int live, dead;
1289
1290     if (!sw) {
1291         return 0;
1292     }
1293
1294     live = sw->total_hw_samples_mixed;
1295
1296     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1297         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1298         return 0;
1299     }
1300
1301     dead = sw->hw->samples - live;
1302
1303 #ifdef DEBUG_OUT
1304     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1305            SW_NAME (sw),
1306            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1307 #endif
1308
1309     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1310 }
1311
1312 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1313 {
1314     int n;
1315
1316     if (hw->enabled) {
1317         SWVoiceCap *sc;
1318
1319         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1320             SWVoiceOut *sw = &sc->sw;
1321             int rpos2 = rpos;
1322
1323             n = samples;
1324             while (n) {
1325                 int till_end_of_hw = hw->samples - rpos2;
1326                 int to_write = audio_MIN (till_end_of_hw, n);
1327                 int bytes = to_write << hw->info.shift;
1328                 int written;
1329
1330                 sw->buf = hw->mix_buf + rpos2;
1331                 written = audio_pcm_sw_write (sw, NULL, bytes);
1332                 if (written - bytes) {
1333                     dolog ("Could not mix %d bytes into a capture "
1334                            "buffer, mixed %d\n",
1335                            bytes, written);
1336                     break;
1337                 }
1338                 n -= to_write;
1339                 rpos2 = (rpos2 + to_write) % hw->samples;
1340             }
1341         }
1342     }
1343
1344     n = audio_MIN (samples, hw->samples - rpos);
1345     mixeng_clear (hw->mix_buf + rpos, n);
1346     mixeng_clear (hw->mix_buf, samples - n);
1347 }
1348
1349 static void audio_run_out (AudioState *s)
1350 {
1351     HWVoiceOut *hw = NULL;
1352     SWVoiceOut *sw;
1353
1354     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1355         int played;
1356         int live, free, nb_live, cleanup_required, prev_rpos;
1357
1358         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1359         if (!nb_live) {
1360             live = 0;
1361         }
1362
1363         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1364             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1365             continue;
1366         }
1367
1368         if (hw->pending_disable && !nb_live) {
1369             SWVoiceCap *sc;
1370 #ifdef DEBUG_OUT
1371             dolog ("Disabling voice\n");
1372 #endif
1373             hw->enabled = 0;
1374             hw->pending_disable = 0;
1375             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1376             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1377                 sc->sw.active = 0;
1378                 audio_recalc_and_notify_capture (sc->cap);
1379             }
1380             continue;
1381         }
1382
1383         if (!live) {
1384             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1385                 if (sw->active) {
1386                     free = audio_get_free (sw);
1387                     if (free > 0) {
1388                         sw->callback.fn (sw->callback.opaque, free);
1389                     }
1390                 }
1391             }
1392             continue;
1393         }
1394
1395         prev_rpos = hw->rpos;
1396         played = hw->pcm_ops->run_out (hw, live);
1397         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1398             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1399                    hw->rpos, hw->samples, played);
1400             hw->rpos = 0;
1401         }
1402
1403 #ifdef DEBUG_OUT
1404         dolog ("played=%d\n", played);
1405 #endif
1406
1407         if (played) {
1408             hw->ts_helper += played;
1409             audio_capture_mix_and_clear (hw, prev_rpos, played);
1410         }
1411
1412         cleanup_required = 0;
1413         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1414             if (!sw->active && sw->empty) {
1415                 continue;
1416             }
1417
1418             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1419                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1420                        played, sw->total_hw_samples_mixed);
1421                 played = sw->total_hw_samples_mixed;
1422             }
1423
1424             sw->total_hw_samples_mixed -= played;
1425
1426             if (!sw->total_hw_samples_mixed) {
1427                 sw->empty = 1;
1428                 cleanup_required |= !sw->active && !sw->callback.fn;
1429             }
1430
1431             if (sw->active) {
1432                 free = audio_get_free (sw);
1433                 if (free > 0) {
1434                     sw->callback.fn (sw->callback.opaque, free);
1435                 }
1436             }
1437         }
1438
1439         if (cleanup_required) {
1440             SWVoiceOut *sw1;
1441
1442             sw = hw->sw_head.lh_first;
1443             while (sw) {
1444                 sw1 = sw->entries.le_next;
1445                 if (!sw->active && !sw->callback.fn) {
1446 #ifdef DEBUG_PLIVE
1447                     dolog ("Finishing with old voice\n");
1448 #endif
1449                     audio_close_out (sw);
1450                 }
1451                 sw = sw1;
1452             }
1453         }
1454     }
1455 }
1456
1457 static void audio_run_in (AudioState *s)
1458 {
1459     HWVoiceIn *hw = NULL;
1460
1461     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1462         SWVoiceIn *sw;
1463         int captured, min;
1464
1465         captured = hw->pcm_ops->run_in (hw);
1466
1467         min = audio_pcm_hw_find_min_in (hw);
1468         hw->total_samples_captured += captured - min;
1469         hw->ts_helper += captured;
1470
1471         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1472             sw->total_hw_samples_acquired -= min;
1473
1474             if (sw->active) {
1475                 int avail;
1476
1477                 avail = audio_get_avail (sw);
1478                 if (avail > 0) {
1479                     sw->callback.fn (sw->callback.opaque, avail);
1480                 }
1481             }
1482         }
1483     }
1484 }
1485
1486 static void audio_run_capture (AudioState *s)
1487 {
1488     CaptureVoiceOut *cap;
1489
1490     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1491         int live, rpos, captured;
1492         HWVoiceOut *hw = &cap->hw;
1493         SWVoiceOut *sw;
1494
1495         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1496         rpos = hw->rpos;
1497         while (live) {
1498             int left = hw->samples - rpos;
1499             int to_capture = audio_MIN (live, left);
1500             struct st_sample *src;
1501             struct capture_callback *cb;
1502
1503             src = hw->mix_buf + rpos;
1504             hw->clip (cap->buf, src, to_capture);
1505             mixeng_clear (src, to_capture);
1506
1507             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1508                 cb->ops.capture (cb->opaque, cap->buf,
1509                                  to_capture << hw->info.shift);
1510             }
1511             rpos = (rpos + to_capture) % hw->samples;
1512             live -= to_capture;
1513         }
1514         hw->rpos = rpos;
1515
1516         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1517             if (!sw->active && sw->empty) {
1518                 continue;
1519             }
1520
1521             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1522                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1523                        captured, sw->total_hw_samples_mixed);
1524                 captured = sw->total_hw_samples_mixed;
1525             }
1526
1527             sw->total_hw_samples_mixed -= captured;
1528             sw->empty = sw->total_hw_samples_mixed == 0;
1529         }
1530     }
1531 }
1532
1533 void audio_run (const char *msg)
1534 {
1535     AudioState *s = &glob_audio_state;
1536
1537     audio_run_out (s);
1538     audio_run_in (s);
1539     audio_run_capture (s);
1540 #ifdef DEBUG_POLL
1541     {
1542         static double prevtime;
1543         double currtime;
1544         struct timeval tv;
1545
1546         if (gettimeofday (&tv, NULL)) {
1547             perror ("audio_run: gettimeofday");
1548             return;
1549         }
1550
1551         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1552         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1553         prevtime = currtime;
1554     }
1555 #endif
1556 }
1557
1558 static struct audio_option audio_options[] = {
1559     /* DAC */
1560     {
1561         .name  = "DAC_FIXED_SETTINGS",
1562         .tag   = AUD_OPT_BOOL,
1563         .valp  = &conf.fixed_out.enabled,
1564         .descr = "Use fixed settings for host DAC"
1565     },
1566     {
1567         .name  = "DAC_FIXED_FREQ",
1568         .tag   = AUD_OPT_INT,
1569         .valp  = &conf.fixed_out.settings.freq,
1570         .descr = "Frequency for fixed host DAC"
1571     },
1572     {
1573         .name  = "DAC_FIXED_FMT",
1574         .tag   = AUD_OPT_FMT,
1575         .valp  = &conf.fixed_out.settings.fmt,
1576         .descr = "Format for fixed host DAC"
1577     },
1578     {
1579         .name  = "DAC_FIXED_CHANNELS",
1580         .tag   = AUD_OPT_INT,
1581         .valp  = &conf.fixed_out.settings.nchannels,
1582         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1583     },
1584     {
1585         .name  = "DAC_VOICES",
1586         .tag   = AUD_OPT_INT,
1587         .valp  = &conf.fixed_out.nb_voices,
1588         .descr = "Number of voices for DAC"
1589     },
1590     {
1591         .name  = "DAC_TRY_POLL",
1592         .tag   = AUD_OPT_BOOL,
1593         .valp  = &conf.try_poll_out,
1594         .descr = "Attempt using poll mode for DAC"
1595     },
1596     /* ADC */
1597     {
1598         .name  = "ADC_FIXED_SETTINGS",
1599         .tag   = AUD_OPT_BOOL,
1600         .valp  = &conf.fixed_in.enabled,
1601         .descr = "Use fixed settings for host ADC"
1602     },
1603     {
1604         .name  = "ADC_FIXED_FREQ",
1605         .tag   = AUD_OPT_INT,
1606         .valp  = &conf.fixed_in.settings.freq,
1607         .descr = "Frequency for fixed host ADC"
1608     },
1609     {
1610         .name  = "ADC_FIXED_FMT",
1611         .tag   = AUD_OPT_FMT,
1612         .valp  = &conf.fixed_in.settings.fmt,
1613         .descr = "Format for fixed host ADC"
1614     },
1615     {
1616         .name  = "ADC_FIXED_CHANNELS",
1617         .tag   = AUD_OPT_INT,
1618         .valp  = &conf.fixed_in.settings.nchannels,
1619         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1620     },
1621     {
1622         .name  = "ADC_VOICES",
1623         .tag   = AUD_OPT_INT,
1624         .valp  = &conf.fixed_in.nb_voices,
1625         .descr = "Number of voices for ADC"
1626     },
1627     {
1628         .name  = "ADC_TRY_POLL",
1629         .tag   = AUD_OPT_BOOL,
1630         .valp  = &conf.try_poll_in,
1631         .descr = "Attempt using poll mode for ADC"
1632     },
1633     /* Misc */
1634     {
1635         .name  = "TIMER_PERIOD",
1636         .tag   = AUD_OPT_INT,
1637         .valp  = &conf.period.hertz,
1638         .descr = "Timer period in HZ (0 - use lowest possible)"
1639     },
1640     {
1641         .name  = "PLIVE",
1642         .tag   = AUD_OPT_BOOL,
1643         .valp  = &conf.plive,
1644         .descr = "(undocumented)"
1645     },
1646     {
1647         .name  = "LOG_TO_MONITOR",
1648         .tag   = AUD_OPT_BOOL,
1649         .valp  = &conf.log_to_monitor,
1650         .descr = "Print logging messages to monitor instead of stderr"
1651     },
1652     { /* End of list */ }
1653 };
1654
1655 static void audio_pp_nb_voices (const char *typ, int nb)
1656 {
1657     switch (nb) {
1658     case 0:
1659         printf ("Does not support %s\n", typ);
1660         break;
1661     case 1:
1662         printf ("One %s voice\n", typ);
1663         break;
1664     case INT_MAX:
1665         printf ("Theoretically supports many %s voices\n", typ);
1666         break;
1667     default:
1668         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1669         break;
1670     }
1671
1672 }
1673
1674 void AUD_help (void)
1675 {
1676     size_t i;
1677
1678     audio_process_options ("AUDIO", audio_options);
1679     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1680         struct audio_driver *d = drvtab[i];
1681         if (d->options) {
1682             audio_process_options (d->name, d->options);
1683         }
1684     }
1685
1686     printf ("Audio options:\n");
1687     audio_print_options ("AUDIO", audio_options);
1688     printf ("\n");
1689
1690     printf ("Available drivers:\n");
1691
1692     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1693         struct audio_driver *d = drvtab[i];
1694
1695         printf ("Name: %s\n", d->name);
1696         printf ("Description: %s\n", d->descr);
1697
1698         audio_pp_nb_voices ("playback", d->max_voices_out);
1699         audio_pp_nb_voices ("capture", d->max_voices_in);
1700
1701         if (d->options) {
1702             printf ("Options:\n");
1703             audio_print_options (d->name, d->options);
1704         }
1705         else {
1706             printf ("No options\n");
1707         }
1708         printf ("\n");
1709     }
1710
1711     printf (
1712         "Options are settable through environment variables.\n"
1713         "Example:\n"
1714 #ifdef _WIN32
1715         "  set QEMU_AUDIO_DRV=wav\n"
1716         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1717 #else
1718         "  export QEMU_AUDIO_DRV=wav\n"
1719         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1720         "(for csh replace export with setenv in the above)\n"
1721 #endif
1722         "  qemu ...\n\n"
1723         );
1724 }
1725
1726 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1727 {
1728     if (drv->options) {
1729         audio_process_options (drv->name, drv->options);
1730     }
1731     s->drv_opaque = drv->init ();
1732
1733     if (s->drv_opaque) {
1734         audio_init_nb_voices_out (drv);
1735         audio_init_nb_voices_in (drv);
1736         s->drv = drv;
1737         return 0;
1738     }
1739     else {
1740         dolog ("Could not init `%s' audio driver\n", drv->name);
1741         return -1;
1742     }
1743 }
1744
1745 static void audio_vm_change_state_handler (void *opaque, int running,
1746                                            int reason)
1747 {
1748     AudioState *s = opaque;
1749     HWVoiceOut *hwo = NULL;
1750     HWVoiceIn *hwi = NULL;
1751     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1752
1753     s->vm_running = running;
1754     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1755         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1756     }
1757
1758     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1759         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1760     }
1761     audio_reset_timer (s);
1762 }
1763
1764 static void audio_atexit (void)
1765 {
1766     AudioState *s = &glob_audio_state;
1767     HWVoiceOut *hwo = NULL;
1768     HWVoiceIn *hwi = NULL;
1769
1770     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1771         SWVoiceCap *sc;
1772
1773         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1774         hwo->pcm_ops->fini_out (hwo);
1775
1776         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1777             CaptureVoiceOut *cap = sc->cap;
1778             struct capture_callback *cb;
1779
1780             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1781                 cb->ops.destroy (cb->opaque);
1782             }
1783         }
1784     }
1785
1786     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1787         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1788         hwi->pcm_ops->fini_in (hwi);
1789     }
1790
1791     if (s->drv) {
1792         s->drv->fini (s->drv_opaque);
1793     }
1794 }
1795
1796 static const VMStateDescription vmstate_audio = {
1797     .name = "audio",
1798     .version_id = 1,
1799     .minimum_version_id = 1,
1800     .minimum_version_id_old = 1,
1801     .fields      = (VMStateField []) {
1802         VMSTATE_END_OF_LIST()
1803     }
1804 };
1805
1806 static void audio_init (void)
1807 {
1808     size_t i;
1809     int done = 0;
1810     const char *drvname;
1811     VMChangeStateEntry *e;
1812     AudioState *s = &glob_audio_state;
1813
1814     if (s->drv) {
1815         return;
1816     }
1817
1818     QLIST_INIT (&s->hw_head_out);
1819     QLIST_INIT (&s->hw_head_in);
1820     QLIST_INIT (&s->cap_head);
1821     atexit (audio_atexit);
1822
1823     s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1824     if (!s->ts) {
1825         hw_error("Could not create audio timer\n");
1826     }
1827
1828     audio_process_options ("AUDIO", audio_options);
1829
1830     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1831     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1832
1833     if (s->nb_hw_voices_out <= 0) {
1834         dolog ("Bogus number of playback voices %d, setting to 1\n",
1835                s->nb_hw_voices_out);
1836         s->nb_hw_voices_out = 1;
1837     }
1838
1839     if (s->nb_hw_voices_in <= 0) {
1840         dolog ("Bogus number of capture voices %d, setting to 0\n",
1841                s->nb_hw_voices_in);
1842         s->nb_hw_voices_in = 0;
1843     }
1844
1845     {
1846         int def;
1847         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1848     }
1849
1850     if (drvname) {
1851         int found = 0;
1852
1853         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1854             if (!strcmp (drvname, drvtab[i]->name)) {
1855                 done = !audio_driver_init (s, drvtab[i]);
1856                 found = 1;
1857                 break;
1858             }
1859         }
1860
1861         if (!found) {
1862             dolog ("Unknown audio driver `%s'\n", drvname);
1863             dolog ("Run with -audio-help to list available drivers\n");
1864         }
1865     }
1866
1867     if (!done) {
1868         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1869             if (drvtab[i]->can_be_default) {
1870                 done = !audio_driver_init (s, drvtab[i]);
1871             }
1872         }
1873     }
1874
1875     if (!done) {
1876         done = !audio_driver_init (s, &no_audio_driver);
1877         if (!done) {
1878             hw_error("Could not initialize audio subsystem\n");
1879         }
1880         else {
1881             dolog ("warning: Using timer based audio emulation\n");
1882         }
1883     }
1884
1885     if (conf.period.hertz <= 0) {
1886         if (conf.period.hertz < 0) {
1887             dolog ("warning: Timer period is negative - %d "
1888                    "treating as zero\n",
1889                    conf.period.hertz);
1890         }
1891         conf.period.ticks = 1;
1892     } else {
1893         conf.period.ticks =
1894             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1895     }
1896
1897     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1898     if (!e) {
1899         dolog ("warning: Could not register change state handler\n"
1900                "(Audio can continue looping even after stopping the VM)\n");
1901     }
1902
1903     QLIST_INIT (&s->card_head);
1904     vmstate_register (NULL, 0, &vmstate_audio, s);
1905 }
1906
1907 void AUD_register_card (const char *name, QEMUSoundCard *card)
1908 {
1909     audio_init ();
1910     card->name = qemu_strdup (name);
1911     memset (&card->entries, 0, sizeof (card->entries));
1912     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1913 }
1914
1915 void AUD_remove_card (QEMUSoundCard *card)
1916 {
1917     QLIST_REMOVE (card, entries);
1918     qemu_free (card->name);
1919 }
1920
1921
1922 CaptureVoiceOut *AUD_add_capture (
1923     struct audsettings *as,
1924     struct audio_capture_ops *ops,
1925     void *cb_opaque
1926     )
1927 {
1928     AudioState *s = &glob_audio_state;
1929     CaptureVoiceOut *cap;
1930     struct capture_callback *cb;
1931
1932     if (audio_validate_settings (as)) {
1933         dolog ("Invalid settings were passed when trying to add capture\n");
1934         audio_print_settings (as);
1935         goto err0;
1936     }
1937
1938     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1939     if (!cb) {
1940         dolog ("Could not allocate capture callback information, size %zu\n",
1941                sizeof (*cb));
1942         goto err0;
1943     }
1944     cb->ops = *ops;
1945     cb->opaque = cb_opaque;
1946
1947     cap = audio_pcm_capture_find_specific (as);
1948     if (cap) {
1949         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1950         return cap;
1951     }
1952     else {
1953         HWVoiceOut *hw;
1954         CaptureVoiceOut *cap;
1955
1956         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1957         if (!cap) {
1958             dolog ("Could not allocate capture voice, size %zu\n",
1959                    sizeof (*cap));
1960             goto err1;
1961         }
1962
1963         hw = &cap->hw;
1964         QLIST_INIT (&hw->sw_head);
1965         QLIST_INIT (&cap->cb_head);
1966
1967         /* XXX find a more elegant way */
1968         hw->samples = 4096 * 4;
1969         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1970                                     sizeof (struct st_sample));
1971         if (!hw->mix_buf) {
1972             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1973                    hw->samples);
1974             goto err2;
1975         }
1976
1977         audio_pcm_init_info (&hw->info, as);
1978
1979         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1980         if (!cap->buf) {
1981             dolog ("Could not allocate capture buffer "
1982                    "(%d samples, each %d bytes)\n",
1983                    hw->samples, 1 << hw->info.shift);
1984             goto err3;
1985         }
1986
1987         hw->clip = mixeng_clip
1988             [hw->info.nchannels == 2]
1989             [hw->info.sign]
1990             [hw->info.swap_endianness]
1991             [audio_bits_to_index (hw->info.bits)];
1992
1993         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1994         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1995
1996         hw = NULL;
1997         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1998             audio_attach_capture (hw);
1999         }
2000         return cap;
2001
2002     err3:
2003         qemu_free (cap->hw.mix_buf);
2004     err2:
2005         qemu_free (cap);
2006     err1:
2007         qemu_free (cb);
2008     err0:
2009         return NULL;
2010     }
2011 }
2012
2013 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2014 {
2015     struct capture_callback *cb;
2016
2017     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2018         if (cb->opaque == cb_opaque) {
2019             cb->ops.destroy (cb_opaque);
2020             QLIST_REMOVE (cb, entries);
2021             qemu_free (cb);
2022
2023             if (!cap->cb_head.lh_first) {
2024                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2025
2026                 while (sw) {
2027                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2028 #ifdef DEBUG_CAPTURE
2029                     dolog ("freeing %s\n", sw->name);
2030 #endif
2031
2032                     sw1 = sw->entries.le_next;
2033                     if (sw->rate) {
2034                         st_rate_stop (sw->rate);
2035                         sw->rate = NULL;
2036                     }
2037                     QLIST_REMOVE (sw, entries);
2038                     QLIST_REMOVE (sc, entries);
2039                     qemu_free (sc);
2040                     sw = sw1;
2041                 }
2042                 QLIST_REMOVE (cap, entries);
2043                 qemu_free (cap);
2044             }
2045             return;
2046         }
2047     }
2048 }
2049
2050 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2051 {
2052     if (sw) {
2053         sw->vol.mute = mute;
2054         sw->vol.l = nominal_volume.l * lvol / 255;
2055         sw->vol.r = nominal_volume.r * rvol / 255;
2056     }
2057 }
2058
2059 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2060 {
2061     if (sw) {
2062         sw->vol.mute = mute;
2063         sw->vol.l = nominal_volume.l * lvol / 255;
2064         sw->vol.r = nominal_volume.r * rvol / 255;
2065     }
2066 }