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