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/monitor.h"
  27 #include "qemu/timer.h"
  28 #include "sysemu/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 g_malloc0 (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 = g_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     g_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 = g_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         g_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         /* fall through */
 589     case AUD_FMT_U8:
 590         break;
 591
 592     case AUD_FMT_S16:
 593         sign = 1;
 594         /* fall through */
 595     case AUD_FMT_U16:
 596         bits = 16;
 597         break;
 598
 599     case AUD_FMT_S32:
 600         sign = 1;
 601         /* fall through */
 602     case AUD_FMT_U32:
 603         bits = 32;
 604         break;
 605     }
 606     return info->freq == as->freq
 607         && info->nchannels == as->nchannels
 608         && info->sign == sign
 609         && info->bits == bits
 610         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 611 }
 612
 613 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 614 {
 615     int bits = 8, sign = 0, shift = 0;
 616
 617     switch (as->fmt) {
 618     case AUD_FMT_S8:
 619         sign = 1;
 620     case AUD_FMT_U8:
 621         break;
 622
 623     case AUD_FMT_S16:
 624         sign = 1;
 625     case AUD_FMT_U16:
 626         bits = 16;
 627         shift = 1;
 628         break;
 629
 630     case AUD_FMT_S32:
 631         sign = 1;
 632     case AUD_FMT_U32:
 633         bits = 32;
 634         shift = 2;
 635         break;
 636     }
 637
 638     info->freq = as->freq;
 639     info->bits = bits;
 640     info->sign = sign;
 641     info->nchannels = as->nchannels;
 642     info->shift = (as->nchannels == 2) + shift;
 643     info->align = (1 << info->shift) - 1;
 644     info->bytes_per_second = info->freq << info->shift;
 645     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 646 }
 647
 648 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 649 {
 650     if (!len) {
 651         return;
 652     }
 653
 654     if (info->sign) {
 655         memset (buf, 0x00, len << info->shift);
 656     }
 657     else {
 658         switch (info->bits) {
 659         case 8:
 660             memset (buf, 0x80, len << info->shift);
 661             break;
 662
 663         case 16:
 664             {
 665                 int i;
 666                 uint16_t *p = buf;
 667                 int shift = info->nchannels - 1;
 668                 short s = INT16_MAX;
 669
 670                 if (info->swap_endianness) {
 671                     s = bswap16 (s);
 672                 }
 673
 674                 for (i = 0; i < len << shift; i++) {
 675                     p[i] = s;
 676                 }
 677             }
 678             break;
 679
 680         case 32:
 681             {
 682                 int i;
 683                 uint32_t *p = buf;
 684                 int shift = info->nchannels - 1;
 685                 int32_t s = INT32_MAX;
 686
 687                 if (info->swap_endianness) {
 688                     s = bswap32 (s);
 689                 }
 690
 691                 for (i = 0; i < len << shift; i++) {
 692                     p[i] = s;
 693                 }
 694             }
 695             break;
 696
 697         default:
 698             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 699                      info->bits);
 700             break;
 701         }
 702     }
 703 }
 704
 705 /*
 706  * Capture
 707  */
 708 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 709 {
 710     (void) src;
 711     (void) dst;
 712     (void) samples;
 713 }
 714
 715 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 716     struct audsettings *as
 717     )
 718 {
 719     CaptureVoiceOut *cap;
 720     AudioState *s = &glob_audio_state;
 721
 722     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 723         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 724             return cap;
 725         }
 726     }
 727     return NULL;
 728 }
 729
 730 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 731 {
 732     struct capture_callback *cb;
 733
 734 #ifdef DEBUG_CAPTURE
 735     dolog ("notification %d sent\n", cmd);
 736 #endif
 737     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 738         cb->ops.notify (cb->opaque, cmd);
 739     }
 740 }
 741
 742 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 743 {
 744     if (cap->hw.enabled != enabled) {
 745         audcnotification_e cmd;
 746         cap->hw.enabled = enabled;
 747         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 748         audio_notify_capture (cap, cmd);
 749     }
 750 }
 751
 752 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 753 {
 754     HWVoiceOut *hw = &cap->hw;
 755     SWVoiceOut *sw;
 756     int enabled = 0;
 757
 758     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 759         if (sw->active) {
 760             enabled = 1;
 761             break;
 762         }
 763     }
 764     audio_capture_maybe_changed (cap, enabled);
 765 }
 766
 767 static void audio_detach_capture (HWVoiceOut *hw)
 768 {
 769     SWVoiceCap *sc = hw->cap_head.lh_first;
 770
 771     while (sc) {
 772         SWVoiceCap *sc1 = sc->entries.le_next;
 773         SWVoiceOut *sw = &sc->sw;
 774         CaptureVoiceOut *cap = sc->cap;
 775         int was_active = sw->active;
 776
 777         if (sw->rate) {
 778             st_rate_stop (sw->rate);
 779             sw->rate = NULL;
 780         }
 781
 782         QLIST_REMOVE (sw, entries);
 783         QLIST_REMOVE (sc, entries);
 784         g_free (sc);
 785         if (was_active) {
 786             /* We have removed soft voice from the capture:
 787                this might have changed the overall status of the capture
 788                since this might have been the only active voice */
 789             audio_recalc_and_notify_capture (cap);
 790         }
 791         sc = sc1;
 792     }
 793 }
 794
 795 static int audio_attach_capture (HWVoiceOut *hw)
 796 {
 797     AudioState *s = &glob_audio_state;
 798     CaptureVoiceOut *cap;
 799
 800     audio_detach_capture (hw);
 801     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 802         SWVoiceCap *sc;
 803         SWVoiceOut *sw;
 804         HWVoiceOut *hw_cap = &cap->hw;
 805
 806         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 807         if (!sc) {
 808             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 809                    sizeof (*sc));
 810             return -1;
 811         }
 812
 813         sc->cap = cap;
 814         sw = &sc->sw;
 815         sw->hw = hw_cap;
 816         sw->info = hw->info;
 817         sw->empty = 1;
 818         sw->active = hw->enabled;
 819         sw->conv = noop_conv;
 820         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 821         sw->vol = nominal_volume;
 822         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 823         if (!sw->rate) {
 824             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 825             g_free (sw);
 826             return -1;
 827         }
 828         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 829         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 830 #ifdef DEBUG_CAPTURE
 831         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 832                                     hw, sw->info.freq, sw->info.bits,
 833                                     sw->info.nchannels);
 834         dolog ("Added %s active = %d\n", sw->name, sw->active);
 835 #endif
 836         if (sw->active) {
 837             audio_capture_maybe_changed (cap, 1);
 838         }
 839     }
 840     return 0;
 841 }
 842
 843 /*
 844  * Hard voice (capture)
 845  */
 846 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 847 {
 848     SWVoiceIn *sw;
 849     int m = hw->total_samples_captured;
 850
 851     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 852         if (sw->active) {
 853             m = audio_MIN (m, sw->total_hw_samples_acquired);
 854         }
 855     }
 856     return m;
 857 }
 858
 859 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 860 {
 861     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 862     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 863         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 864         return 0;
 865     }
 866     return live;
 867 }
 868
 869 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 870                            int live, int pending)
 871 {
 872     int left = hw->samples - pending;
 873     int len = audio_MIN (left, live);
 874     int clipped = 0;
 875
 876     while (len) {
 877         struct st_sample *src = hw->mix_buf + hw->rpos;
 878         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 879         int samples_till_end_of_buf = hw->samples - hw->rpos;
 880         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 881
 882         hw->clip (dst, src, samples_to_clip);
 883
 884         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 885         len -= samples_to_clip;
 886         clipped += samples_to_clip;
 887     }
 888     return clipped;
 889 }
 890
 891 /*
 892  * Soft voice (capture)
 893  */
 894 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 895 {
 896     HWVoiceIn *hw = sw->hw;
 897     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 898     int rpos;
 899
 900     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 901         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 902         return 0;
 903     }
 904
 905     rpos = hw->wpos - live;
 906     if (rpos >= 0) {
 907         return rpos;
 908     }
 909     else {
 910         return hw->samples + rpos;
 911     }
 912 }
 913
 914 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 915 {
 916     HWVoiceIn *hw = sw->hw;
 917     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 918     struct st_sample *src, *dst = sw->buf;
 919
 920     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 921
 922     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 923     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 924         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 925         return 0;
 926     }
 927
 928     samples = size >> sw->info.shift;
 929     if (!live) {
 930         return 0;
 931     }
 932
 933     swlim = (live * sw->ratio) >> 32;
 934     swlim = audio_MIN (swlim, samples);
 935
 936     while (swlim) {
 937         src = hw->conv_buf + rpos;
 938         isamp = hw->wpos - rpos;
 939         /* XXX: <= ? */
 940         if (isamp <= 0) {
 941             isamp = hw->samples - rpos;
 942         }
 943
 944         if (!isamp) {
 945             break;
 946         }
 947         osamp = swlim;
 948
 949         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 950             dolog ("osamp=%d\n", osamp);
 951             return 0;
 952         }
 953
 954         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 955         swlim -= osamp;
 956         rpos = (rpos + isamp) % hw->samples;
 957         dst += osamp;
 958         ret += osamp;
 959         total += isamp;
 960     }
 961
 962     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 963         mixeng_volume (sw->buf, ret, &sw->vol);
 964     }
 965
 966     sw->clip (buf, sw->buf, ret);
 967     sw->total_hw_samples_acquired += total;
 968     return ret << sw->info.shift;
 969 }
 970
 971 /*
 972  * Hard voice (playback)
 973  */
 974 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 975 {
 976     SWVoiceOut *sw;
 977     int m = INT_MAX;
 978     int nb_live = 0;
 979
 980     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 981         if (sw->active || !sw->empty) {
 982             m = audio_MIN (m, sw->total_hw_samples_mixed);
 983             nb_live += 1;
 984         }
 985     }
 986
 987     *nb_livep = nb_live;
 988     return m;
 989 }
 990
 991 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 992 {
 993     int smin;
 994     int nb_live1;
 995
 996     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 997     if (nb_live) {
 998         *nb_live = nb_live1;
 999     }
1000
1001     if (nb_live1) {
1002         int live = smin;
1003
1004         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1005             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1006             return 0;
1007         }
1008         return live;
1009     }
1010     return 0;
1011 }
1012
1013 /*
1014  * Soft voice (playback)
1015  */
1016 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1017 {
1018     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1019     int ret = 0, pos = 0, total = 0;
1020
1021     if (!sw) {
1022         return size;
1023     }
1024
1025     hwsamples = sw->hw->samples;
1026
1027     live = sw->total_hw_samples_mixed;
1028     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1029         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1030         return 0;
1031     }
1032
1033     if (live == hwsamples) {
1034 #ifdef DEBUG_OUT
1035         dolog ("%s is full %d\n", sw->name, live);
1036 #endif
1037         return 0;
1038     }
1039
1040     wpos = (sw->hw->rpos + live) % hwsamples;
1041     samples = size >> sw->info.shift;
1042
1043     dead = hwsamples - live;
1044     swlim = ((int64_t) dead << 32) / sw->ratio;
1045     swlim = audio_MIN (swlim, samples);
1046     if (swlim) {
1047         sw->conv (sw->buf, buf, swlim);
1048
1049         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1050             mixeng_volume (sw->buf, swlim, &sw->vol);
1051         }
1052     }
1053
1054     while (swlim) {
1055         dead = hwsamples - live;
1056         left = hwsamples - wpos;
1057         blck = audio_MIN (dead, left);
1058         if (!blck) {
1059             break;
1060         }
1061         isamp = swlim;
1062         osamp = blck;
1063         st_rate_flow_mix (
1064             sw->rate,
1065             sw->buf + pos,
1066             sw->hw->mix_buf + wpos,
1067             &isamp,
1068             &osamp
1069             );
1070         ret += isamp;
1071         swlim -= isamp;
1072         pos += isamp;
1073         live += osamp;
1074         wpos = (wpos + osamp) % hwsamples;
1075         total += osamp;
1076     }
1077
1078     sw->total_hw_samples_mixed += total;
1079     sw->empty = sw->total_hw_samples_mixed == 0;
1080
1081 #ifdef DEBUG_OUT
1082     dolog (
1083         "%s: write size %d ret %d total sw %d\n",
1084         SW_NAME (sw),
1085         size >> sw->info.shift,
1086         ret,
1087         sw->total_hw_samples_mixed
1088         );
1089 #endif
1090
1091     return ret << sw->info.shift;
1092 }
1093
1094 #ifdef DEBUG_AUDIO
1095 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1096 {
1097     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1098            cap, info->bits, info->sign, info->freq, info->nchannels);
1099 }
1100 #endif
1101
1102 #define DAC
1103 #include "audio_template.h"
1104 #undef DAC
1105 #include "audio_template.h"
1106
1107 /*
1108  * Timer
1109  */
1110 static int audio_is_timer_needed (void)
1111 {
1112     HWVoiceIn *hwi = NULL;
1113     HWVoiceOut *hwo = NULL;
1114
1115     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1116         if (!hwo->poll_mode) return 1;
1117     }
1118     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1119         if (!hwi->poll_mode) return 1;
1120     }
1121     return 0;
1122 }
1123
1124 static void audio_reset_timer (AudioState *s)
1125 {
1126     if (audio_is_timer_needed ()) {
1127         qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1128     }
1129     else {
1130         qemu_del_timer (s->ts);
1131     }
1132 }
1133
1134 static void audio_timer (void *opaque)
1135 {
1136     audio_run ("timer");
1137     audio_reset_timer (opaque);
1138 }
1139
1140 /*
1141  * Public API
1142  */
1143 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1144 {
1145     int bytes;
1146
1147     if (!sw) {
1148         /* XXX: Consider options */
1149         return size;
1150     }
1151
1152     if (!sw->hw->enabled) {
1153         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1154         return 0;
1155     }
1156
1157     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1158     return bytes;
1159 }
1160
1161 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1162 {
1163     int bytes;
1164
1165     if (!sw) {
1166         /* XXX: Consider options */
1167         return size;
1168     }
1169
1170     if (!sw->hw->enabled) {
1171         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1172         return 0;
1173     }
1174
1175     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1176     return bytes;
1177 }
1178
1179 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1180 {
1181     return sw->hw->samples << sw->hw->info.shift;
1182 }
1183
1184 void AUD_set_active_out (SWVoiceOut *sw, int on)
1185 {
1186     HWVoiceOut *hw;
1187
1188     if (!sw) {
1189         return;
1190     }
1191
1192     hw = sw->hw;
1193     if (sw->active != on) {
1194         AudioState *s = &glob_audio_state;
1195         SWVoiceOut *temp_sw;
1196         SWVoiceCap *sc;
1197
1198         if (on) {
1199             hw->pending_disable = 0;
1200             if (!hw->enabled) {
1201                 hw->enabled = 1;
1202                 if (s->vm_running) {
1203                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1204                     audio_reset_timer (s);
1205                 }
1206             }
1207         }
1208         else {
1209             if (hw->enabled) {
1210                 int nb_active = 0;
1211
1212                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1213                      temp_sw = temp_sw->entries.le_next) {
1214                     nb_active += temp_sw->active != 0;
1215                 }
1216
1217                 hw->pending_disable = nb_active == 1;
1218             }
1219         }
1220
1221         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1222             sc->sw.active = hw->enabled;
1223             if (hw->enabled) {
1224                 audio_capture_maybe_changed (sc->cap, 1);
1225             }
1226         }
1227         sw->active = on;
1228     }
1229 }
1230
1231 void AUD_set_active_in (SWVoiceIn *sw, int on)
1232 {
1233     HWVoiceIn *hw;
1234
1235     if (!sw) {
1236         return;
1237     }
1238
1239     hw = sw->hw;
1240     if (sw->active != on) {
1241         AudioState *s = &glob_audio_state;
1242         SWVoiceIn *temp_sw;
1243
1244         if (on) {
1245             if (!hw->enabled) {
1246                 hw->enabled = 1;
1247                 if (s->vm_running) {
1248                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1249                     audio_reset_timer (s);
1250                 }
1251             }
1252             sw->total_hw_samples_acquired = hw->total_samples_captured;
1253         }
1254         else {
1255             if (hw->enabled) {
1256                 int nb_active = 0;
1257
1258                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1259                      temp_sw = temp_sw->entries.le_next) {
1260                     nb_active += temp_sw->active != 0;
1261                 }
1262
1263                 if (nb_active == 1) {
1264                     hw->enabled = 0;
1265                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1266                 }
1267             }
1268         }
1269         sw->active = on;
1270     }
1271 }
1272
1273 static int audio_get_avail (SWVoiceIn *sw)
1274 {
1275     int live;
1276
1277     if (!sw) {
1278         return 0;
1279     }
1280
1281     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1282     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1283         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1284         return 0;
1285     }
1286
1287     ldebug (
1288         "%s: get_avail live %d ret %" PRId64 "\n",
1289         SW_NAME (sw),
1290         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1291         );
1292
1293     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1294 }
1295
1296 static int audio_get_free (SWVoiceOut *sw)
1297 {
1298     int live, dead;
1299
1300     if (!sw) {
1301         return 0;
1302     }
1303
1304     live = sw->total_hw_samples_mixed;
1305
1306     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1307         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1308         return 0;
1309     }
1310
1311     dead = sw->hw->samples - live;
1312
1313 #ifdef DEBUG_OUT
1314     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1315            SW_NAME (sw),
1316            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1317 #endif
1318
1319     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1320 }
1321
1322 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1323 {
1324     int n;
1325
1326     if (hw->enabled) {
1327         SWVoiceCap *sc;
1328
1329         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1330             SWVoiceOut *sw = &sc->sw;
1331             int rpos2 = rpos;
1332
1333             n = samples;
1334             while (n) {
1335                 int till_end_of_hw = hw->samples - rpos2;
1336                 int to_write = audio_MIN (till_end_of_hw, n);
1337                 int bytes = to_write << hw->info.shift;
1338                 int written;
1339
1340                 sw->buf = hw->mix_buf + rpos2;
1341                 written = audio_pcm_sw_write (sw, NULL, bytes);
1342                 if (written - bytes) {
1343                     dolog ("Could not mix %d bytes into a capture "
1344                            "buffer, mixed %d\n",
1345                            bytes, written);
1346                     break;
1347                 }
1348                 n -= to_write;
1349                 rpos2 = (rpos2 + to_write) % hw->samples;
1350             }
1351         }
1352     }
1353
1354     n = audio_MIN (samples, hw->samples - rpos);
1355     mixeng_clear (hw->mix_buf + rpos, n);
1356     mixeng_clear (hw->mix_buf, samples - n);
1357 }
1358
1359 static void audio_run_out (AudioState *s)
1360 {
1361     HWVoiceOut *hw = NULL;
1362     SWVoiceOut *sw;
1363
1364     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1365         int played;
1366         int live, free, nb_live, cleanup_required, prev_rpos;
1367
1368         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1369         if (!nb_live) {
1370             live = 0;
1371         }
1372
1373         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1374             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1375             continue;
1376         }
1377
1378         if (hw->pending_disable && !nb_live) {
1379             SWVoiceCap *sc;
1380 #ifdef DEBUG_OUT
1381             dolog ("Disabling voice\n");
1382 #endif
1383             hw->enabled = 0;
1384             hw->pending_disable = 0;
1385             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1386             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1387                 sc->sw.active = 0;
1388                 audio_recalc_and_notify_capture (sc->cap);
1389             }
1390             continue;
1391         }
1392
1393         if (!live) {
1394             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1395                 if (sw->active) {
1396                     free = audio_get_free (sw);
1397                     if (free > 0) {
1398                         sw->callback.fn (sw->callback.opaque, free);
1399                     }
1400                 }
1401             }
1402             continue;
1403         }
1404
1405         prev_rpos = hw->rpos;
1406         played = hw->pcm_ops->run_out (hw, live);
1407         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1408             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1409                    hw->rpos, hw->samples, played);
1410             hw->rpos = 0;
1411         }
1412
1413 #ifdef DEBUG_OUT
1414         dolog ("played=%d\n", played);
1415 #endif
1416
1417         if (played) {
1418             hw->ts_helper += played;
1419             audio_capture_mix_and_clear (hw, prev_rpos, played);
1420         }
1421
1422         cleanup_required = 0;
1423         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1424             if (!sw->active && sw->empty) {
1425                 continue;
1426             }
1427
1428             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1429                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1430                        played, sw->total_hw_samples_mixed);
1431                 played = sw->total_hw_samples_mixed;
1432             }
1433
1434             sw->total_hw_samples_mixed -= played;
1435
1436             if (!sw->total_hw_samples_mixed) {
1437                 sw->empty = 1;
1438                 cleanup_required |= !sw->active && !sw->callback.fn;
1439             }
1440
1441             if (sw->active) {
1442                 free = audio_get_free (sw);
1443                 if (free > 0) {
1444                     sw->callback.fn (sw->callback.opaque, free);
1445                 }
1446             }
1447         }
1448
1449         if (cleanup_required) {
1450             SWVoiceOut *sw1;
1451
1452             sw = hw->sw_head.lh_first;
1453             while (sw) {
1454                 sw1 = sw->entries.le_next;
1455                 if (!sw->active && !sw->callback.fn) {
1456 #ifdef DEBUG_PLIVE
1457                     dolog ("Finishing with old voice\n");
1458 #endif
1459                     audio_close_out (sw);
1460                 }
1461                 sw = sw1;
1462             }
1463         }
1464     }
1465 }
1466
1467 static void audio_run_in (AudioState *s)
1468 {
1469     HWVoiceIn *hw = NULL;
1470
1471     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1472         SWVoiceIn *sw;
1473         int captured, min;
1474
1475         captured = hw->pcm_ops->run_in (hw);
1476
1477         min = audio_pcm_hw_find_min_in (hw);
1478         hw->total_samples_captured += captured - min;
1479         hw->ts_helper += captured;
1480
1481         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1482             sw->total_hw_samples_acquired -= min;
1483
1484             if (sw->active) {
1485                 int avail;
1486
1487                 avail = audio_get_avail (sw);
1488                 if (avail > 0) {
1489                     sw->callback.fn (sw->callback.opaque, avail);
1490                 }
1491             }
1492         }
1493     }
1494 }
1495
1496 static void audio_run_capture (AudioState *s)
1497 {
1498     CaptureVoiceOut *cap;
1499
1500     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1501         int live, rpos, captured;
1502         HWVoiceOut *hw = &cap->hw;
1503         SWVoiceOut *sw;
1504
1505         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1506         rpos = hw->rpos;
1507         while (live) {
1508             int left = hw->samples - rpos;
1509             int to_capture = audio_MIN (live, left);
1510             struct st_sample *src;
1511             struct capture_callback *cb;
1512
1513             src = hw->mix_buf + rpos;
1514             hw->clip (cap->buf, src, to_capture);
1515             mixeng_clear (src, to_capture);
1516
1517             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1518                 cb->ops.capture (cb->opaque, cap->buf,
1519                                  to_capture << hw->info.shift);
1520             }
1521             rpos = (rpos + to_capture) % hw->samples;
1522             live -= to_capture;
1523         }
1524         hw->rpos = rpos;
1525
1526         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1527             if (!sw->active && sw->empty) {
1528                 continue;
1529             }
1530
1531             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1532                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1533                        captured, sw->total_hw_samples_mixed);
1534                 captured = sw->total_hw_samples_mixed;
1535             }
1536
1537             sw->total_hw_samples_mixed -= captured;
1538             sw->empty = sw->total_hw_samples_mixed == 0;
1539         }
1540     }
1541 }
1542
1543 void audio_run (const char *msg)
1544 {
1545     AudioState *s = &glob_audio_state;
1546
1547     audio_run_out (s);
1548     audio_run_in (s);
1549     audio_run_capture (s);
1550 #ifdef DEBUG_POLL
1551     {
1552         static double prevtime;
1553         double currtime;
1554         struct timeval tv;
1555
1556         if (gettimeofday (&tv, NULL)) {
1557             perror ("audio_run: gettimeofday");
1558             return;
1559         }
1560
1561         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1562         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1563         prevtime = currtime;
1564     }
1565 #endif
1566 }
1567
1568 static struct audio_option audio_options[] = {
1569     /* DAC */
1570     {
1571         .name  = "DAC_FIXED_SETTINGS",
1572         .tag   = AUD_OPT_BOOL,
1573         .valp  = &conf.fixed_out.enabled,
1574         .descr = "Use fixed settings for host DAC"
1575     },
1576     {
1577         .name  = "DAC_FIXED_FREQ",
1578         .tag   = AUD_OPT_INT,
1579         .valp  = &conf.fixed_out.settings.freq,
1580         .descr = "Frequency for fixed host DAC"
1581     },
1582     {
1583         .name  = "DAC_FIXED_FMT",
1584         .tag   = AUD_OPT_FMT,
1585         .valp  = &conf.fixed_out.settings.fmt,
1586         .descr = "Format for fixed host DAC"
1587     },
1588     {
1589         .name  = "DAC_FIXED_CHANNELS",
1590         .tag   = AUD_OPT_INT,
1591         .valp  = &conf.fixed_out.settings.nchannels,
1592         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1593     },
1594     {
1595         .name  = "DAC_VOICES",
1596         .tag   = AUD_OPT_INT,
1597         .valp  = &conf.fixed_out.nb_voices,
1598         .descr = "Number of voices for DAC"
1599     },
1600     {
1601         .name  = "DAC_TRY_POLL",
1602         .tag   = AUD_OPT_BOOL,
1603         .valp  = &conf.try_poll_out,
1604         .descr = "Attempt using poll mode for DAC"
1605     },
1606     /* ADC */
1607     {
1608         .name  = "ADC_FIXED_SETTINGS",
1609         .tag   = AUD_OPT_BOOL,
1610         .valp  = &conf.fixed_in.enabled,
1611         .descr = "Use fixed settings for host ADC"
1612     },
1613     {
1614         .name  = "ADC_FIXED_FREQ",
1615         .tag   = AUD_OPT_INT,
1616         .valp  = &conf.fixed_in.settings.freq,
1617         .descr = "Frequency for fixed host ADC"
1618     },
1619     {
1620         .name  = "ADC_FIXED_FMT",
1621         .tag   = AUD_OPT_FMT,
1622         .valp  = &conf.fixed_in.settings.fmt,
1623         .descr = "Format for fixed host ADC"
1624     },
1625     {
1626         .name  = "ADC_FIXED_CHANNELS",
1627         .tag   = AUD_OPT_INT,
1628         .valp  = &conf.fixed_in.settings.nchannels,
1629         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1630     },
1631     {
1632         .name  = "ADC_VOICES",
1633         .tag   = AUD_OPT_INT,
1634         .valp  = &conf.fixed_in.nb_voices,
1635         .descr = "Number of voices for ADC"
1636     },
1637     {
1638         .name  = "ADC_TRY_POLL",
1639         .tag   = AUD_OPT_BOOL,
1640         .valp  = &conf.try_poll_in,
1641         .descr = "Attempt using poll mode for ADC"
1642     },
1643     /* Misc */
1644     {
1645         .name  = "TIMER_PERIOD",
1646         .tag   = AUD_OPT_INT,
1647         .valp  = &conf.period.hertz,
1648         .descr = "Timer period in HZ (0 - use lowest possible)"
1649     },
1650     {
1651         .name  = "PLIVE",
1652         .tag   = AUD_OPT_BOOL,
1653         .valp  = &conf.plive,
1654         .descr = "(undocumented)"
1655     },
1656     {
1657         .name  = "LOG_TO_MONITOR",
1658         .tag   = AUD_OPT_BOOL,
1659         .valp  = &conf.log_to_monitor,
1660         .descr = "Print logging messages to monitor instead of stderr"
1661     },
1662     { /* End of list */ }
1663 };
1664
1665 static void audio_pp_nb_voices (const char *typ, int nb)
1666 {
1667     switch (nb) {
1668     case 0:
1669         printf ("Does not support %s\n", typ);
1670         break;
1671     case 1:
1672         printf ("One %s voice\n", typ);
1673         break;
1674     case INT_MAX:
1675         printf ("Theoretically supports many %s voices\n", typ);
1676         break;
1677     default:
1678         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1679         break;
1680     }
1681
1682 }
1683
1684 void AUD_help (void)
1685 {
1686     size_t i;
1687
1688     audio_process_options ("AUDIO", audio_options);
1689     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1690         struct audio_driver *d = drvtab[i];
1691         if (d->options) {
1692             audio_process_options (d->name, d->options);
1693         }
1694     }
1695
1696     printf ("Audio options:\n");
1697     audio_print_options ("AUDIO", audio_options);
1698     printf ("\n");
1699
1700     printf ("Available drivers:\n");
1701
1702     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1703         struct audio_driver *d = drvtab[i];
1704
1705         printf ("Name: %s\n", d->name);
1706         printf ("Description: %s\n", d->descr);
1707
1708         audio_pp_nb_voices ("playback", d->max_voices_out);
1709         audio_pp_nb_voices ("capture", d->max_voices_in);
1710
1711         if (d->options) {
1712             printf ("Options:\n");
1713             audio_print_options (d->name, d->options);
1714         }
1715         else {
1716             printf ("No options\n");
1717         }
1718         printf ("\n");
1719     }
1720
1721     printf (
1722         "Options are settable through environment variables.\n"
1723         "Example:\n"
1724 #ifdef _WIN32
1725         "  set QEMU_AUDIO_DRV=wav\n"
1726         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1727 #else
1728         "  export QEMU_AUDIO_DRV=wav\n"
1729         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1730         "(for csh replace export with setenv in the above)\n"
1731 #endif
1732         "  qemu ...\n\n"
1733         );
1734 }
1735
1736 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1737 {
1738     if (drv->options) {
1739         audio_process_options (drv->name, drv->options);
1740     }
1741     s->drv_opaque = drv->init ();
1742
1743     if (s->drv_opaque) {
1744         audio_init_nb_voices_out (drv);
1745         audio_init_nb_voices_in (drv);
1746         s->drv = drv;
1747         return 0;
1748     }
1749     else {
1750         dolog ("Could not init `%s' audio driver\n", drv->name);
1751         return -1;
1752     }
1753 }
1754
1755 static void audio_vm_change_state_handler (void *opaque, int running,
1756                                            RunState state)
1757 {
1758     AudioState *s = opaque;
1759     HWVoiceOut *hwo = NULL;
1760     HWVoiceIn *hwi = NULL;
1761     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1762
1763     s->vm_running = running;
1764     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1765         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1766     }
1767
1768     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1769         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1770     }
1771     audio_reset_timer (s);
1772 }
1773
1774 static void audio_atexit (void)
1775 {
1776     AudioState *s = &glob_audio_state;
1777     HWVoiceOut *hwo = NULL;
1778     HWVoiceIn *hwi = NULL;
1779
1780     while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
1781         SWVoiceCap *sc;
1782
1783         if (hwo->enabled) {
1784             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1785         }
1786         hwo->pcm_ops->fini_out (hwo);
1787
1788         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1789             CaptureVoiceOut *cap = sc->cap;
1790             struct capture_callback *cb;
1791
1792             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1793                 cb->ops.destroy (cb->opaque);
1794             }
1795         }
1796     }
1797
1798     while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
1799         if (hwi->enabled) {
1800             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1801         }
1802         hwi->pcm_ops->fini_in (hwi);
1803     }
1804
1805     if (s->drv) {
1806         s->drv->fini (s->drv_opaque);
1807     }
1808 }
1809
1810 static const VMStateDescription vmstate_audio = {
1811     .name = "audio",
1812     .version_id = 1,
1813     .minimum_version_id = 1,
1814     .minimum_version_id_old = 1,
1815     .fields      = (VMStateField []) {
1816         VMSTATE_END_OF_LIST()
1817     }
1818 };
1819
1820 static void audio_init (void)
1821 {
1822     size_t i;
1823     int done = 0;
1824     const char *drvname;
1825     VMChangeStateEntry *e;
1826     AudioState *s = &glob_audio_state;
1827
1828     if (s->drv) {
1829         return;
1830     }
1831
1832     QLIST_INIT (&s->hw_head_out);
1833     QLIST_INIT (&s->hw_head_in);
1834     QLIST_INIT (&s->cap_head);
1835     atexit (audio_atexit);
1836
1837     s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1838     if (!s->ts) {
1839         hw_error("Could not create audio timer\n");
1840     }
1841
1842     audio_process_options ("AUDIO", audio_options);
1843
1844     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1845     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1846
1847     if (s->nb_hw_voices_out <= 0) {
1848         dolog ("Bogus number of playback voices %d, setting to 1\n",
1849                s->nb_hw_voices_out);
1850         s->nb_hw_voices_out = 1;
1851     }
1852
1853     if (s->nb_hw_voices_in <= 0) {
1854         dolog ("Bogus number of capture voices %d, setting to 0\n",
1855                s->nb_hw_voices_in);
1856         s->nb_hw_voices_in = 0;
1857     }
1858
1859     {
1860         int def;
1861         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1862     }
1863
1864     if (drvname) {
1865         int found = 0;
1866
1867         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1868             if (!strcmp (drvname, drvtab[i]->name)) {
1869                 done = !audio_driver_init (s, drvtab[i]);
1870                 found = 1;
1871                 break;
1872             }
1873         }
1874
1875         if (!found) {
1876             dolog ("Unknown audio driver `%s'\n", drvname);
1877             dolog ("Run with -audio-help to list available drivers\n");
1878         }
1879     }
1880
1881     if (!done) {
1882         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1883             if (drvtab[i]->can_be_default) {
1884                 done = !audio_driver_init (s, drvtab[i]);
1885             }
1886         }
1887     }
1888
1889     if (!done) {
1890         done = !audio_driver_init (s, &no_audio_driver);
1891         if (!done) {
1892             hw_error("Could not initialize audio subsystem\n");
1893         }
1894         else {
1895             dolog ("warning: Using timer based audio emulation\n");
1896         }
1897     }
1898
1899     if (conf.period.hertz <= 0) {
1900         if (conf.period.hertz < 0) {
1901             dolog ("warning: Timer period is negative - %d "
1902                    "treating as zero\n",
1903                    conf.period.hertz);
1904         }
1905         conf.period.ticks = 1;
1906     } else {
1907         conf.period.ticks =
1908             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1909     }
1910
1911     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1912     if (!e) {
1913         dolog ("warning: Could not register change state handler\n"
1914                "(Audio can continue looping even after stopping the VM)\n");
1915     }
1916
1917     QLIST_INIT (&s->card_head);
1918     vmstate_register (NULL, 0, &vmstate_audio, s);
1919 }
1920
1921 void AUD_register_card (const char *name, QEMUSoundCard *card)
1922 {
1923     audio_init ();
1924     card->name = g_strdup (name);
1925     memset (&card->entries, 0, sizeof (card->entries));
1926     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1927 }
1928
1929 void AUD_remove_card (QEMUSoundCard *card)
1930 {
1931     QLIST_REMOVE (card, entries);
1932     g_free (card->name);
1933 }
1934
1935
1936 CaptureVoiceOut *AUD_add_capture (
1937     struct audsettings *as,
1938     struct audio_capture_ops *ops,
1939     void *cb_opaque
1940     )
1941 {
1942     AudioState *s = &glob_audio_state;
1943     CaptureVoiceOut *cap;
1944     struct capture_callback *cb;
1945
1946     if (audio_validate_settings (as)) {
1947         dolog ("Invalid settings were passed when trying to add capture\n");
1948         audio_print_settings (as);
1949         goto err0;
1950     }
1951
1952     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1953     if (!cb) {
1954         dolog ("Could not allocate capture callback information, size %zu\n",
1955                sizeof (*cb));
1956         goto err0;
1957     }
1958     cb->ops = *ops;
1959     cb->opaque = cb_opaque;
1960
1961     cap = audio_pcm_capture_find_specific (as);
1962     if (cap) {
1963         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1964         return cap;
1965     }
1966     else {
1967         HWVoiceOut *hw;
1968         CaptureVoiceOut *cap;
1969
1970         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1971         if (!cap) {
1972             dolog ("Could not allocate capture voice, size %zu\n",
1973                    sizeof (*cap));
1974             goto err1;
1975         }
1976
1977         hw = &cap->hw;
1978         QLIST_INIT (&hw->sw_head);
1979         QLIST_INIT (&cap->cb_head);
1980
1981         /* XXX find a more elegant way */
1982         hw->samples = 4096 * 4;
1983         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1984                                     sizeof (struct st_sample));
1985         if (!hw->mix_buf) {
1986             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1987                    hw->samples);
1988             goto err2;
1989         }
1990
1991         audio_pcm_init_info (&hw->info, as);
1992
1993         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1994         if (!cap->buf) {
1995             dolog ("Could not allocate capture buffer "
1996                    "(%d samples, each %d bytes)\n",
1997                    hw->samples, 1 << hw->info.shift);
1998             goto err3;
1999         }
2000
2001         hw->clip = mixeng_clip
2002             [hw->info.nchannels == 2]
2003             [hw->info.sign]
2004             [hw->info.swap_endianness]
2005             [audio_bits_to_index (hw->info.bits)];
2006
2007         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2008         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2009
2010         hw = NULL;
2011         while ((hw = audio_pcm_hw_find_any_out (hw))) {
2012             audio_attach_capture (hw);
2013         }
2014         return cap;
2015
2016     err3:
2017         g_free (cap->hw.mix_buf);
2018     err2:
2019         g_free (cap);
2020     err1:
2021         g_free (cb);
2022     err0:
2023         return NULL;
2024     }
2025 }
2026
2027 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2028 {
2029     struct capture_callback *cb;
2030
2031     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2032         if (cb->opaque == cb_opaque) {
2033             cb->ops.destroy (cb_opaque);
2034             QLIST_REMOVE (cb, entries);
2035             g_free (cb);
2036
2037             if (!cap->cb_head.lh_first) {
2038                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2039
2040                 while (sw) {
2041                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2042 #ifdef DEBUG_CAPTURE
2043                     dolog ("freeing %s\n", sw->name);
2044 #endif
2045
2046                     sw1 = sw->entries.le_next;
2047                     if (sw->rate) {
2048                         st_rate_stop (sw->rate);
2049                         sw->rate = NULL;
2050                     }
2051                     QLIST_REMOVE (sw, entries);
2052                     QLIST_REMOVE (sc, entries);
2053                     g_free (sc);
2054                     sw = sw1;
2055                 }
2056                 QLIST_REMOVE (cap, entries);
2057                 g_free (cap);
2058             }
2059             return;
2060         }
2061     }
2062 }
2063
2064 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2065 {
2066     if (sw) {
2067         HWVoiceOut *hw = sw->hw;
2068
2069         sw->vol.mute = mute;
2070         sw->vol.l = nominal_volume.l * lvol / 255;
2071         sw->vol.r = nominal_volume.r * rvol / 255;
2072
2073         if (hw->pcm_ops->ctl_out) {
2074             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2075         }
2076     }
2077 }
2078
2079 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2080 {
2081     if (sw) {
2082         HWVoiceIn *hw = sw->hw;
2083
2084         sw->vol.mute = mute;
2085         sw->vol.l = nominal_volume.l * lvol / 255;
2086         sw->vol.r = nominal_volume.r * rvol / 255;
2087
2088         if (hw->pcm_ops->ctl_in) {
2089             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2090         }
2091     }
2092 }