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     CONFIG_AUDIO_DRIVERS
  48     &no_audio_driver,
  49     &wav_audio_driver
  50 };
  51
  52 struct fixed_settings {
  53     int enabled;
  54     int nb_voices;
  55     int greedy;
  56     struct audsettings settings;
  57 };
  58
  59 static struct {
  60     struct fixed_settings fixed_out;
  61     struct fixed_settings fixed_in;
  62     union {
  63         int hertz;
  64         int64_t ticks;
  65     } period;
  66     int plive;
  67     int log_to_monitor;
  68     int try_poll_in;
  69     int try_poll_out;
  70 } conf = {
  71     .fixed_out = { /* DAC fixed settings */
  72         .enabled = 1,
  73         .nb_voices = 1,
  74         .greedy = 1,
  75         .settings = {
  76             .freq = 44100,
  77             .nchannels = 2,
  78             .fmt = AUD_FMT_S16,
  79             .endianness =  AUDIO_HOST_ENDIANNESS,
  80         }
  81     },
  82
  83     .fixed_in = { /* ADC fixed settings */
  84         .enabled = 1,
  85         .nb_voices = 1,
  86         .greedy = 1,
  87         .settings = {
  88             .freq = 44100,
  89             .nchannels = 2,
  90             .fmt = AUD_FMT_S16,
  91             .endianness = AUDIO_HOST_ENDIANNESS,
  92         }
  93     },
  94
  95     .period = { .hertz = 250 },
  96     .plive = 0,
  97     .log_to_monitor = 0,
  98     .try_poll_in = 1,
  99     .try_poll_out = 1,
 100 };
 101
 102 static AudioState glob_audio_state;
 103
 104 struct mixeng_volume nominal_volume = {
 105     .mute = 0,
 106 #ifdef FLOAT_MIXENG
 107     .r = 1.0,
 108     .l = 1.0,
 109 #else
 110     .r = 1ULL << 32,
 111     .l = 1ULL << 32,
 112 #endif
 113 };
 114
 115 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 116 #error No its not
 117 #else
 118 static void audio_print_options (const char *prefix,
 119                                  struct audio_option *opt);
 120
 121 int audio_bug (const char *funcname, int cond)
 122 {
 123     if (cond) {
 124         static int shown;
 125
 126         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 127         if (!shown) {
 128             struct audio_driver *d;
 129
 130             shown = 1;
 131             AUD_log (NULL, "Save all your work and restart without audio\n");
 132             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 133             AUD_log (NULL, "I am sorry\n");
 134             d = glob_audio_state.drv;
 135             if (d) {
 136                 audio_print_options (d->name, d->options);
 137             }
 138         }
 139         AUD_log (NULL, "Context:\n");
 140
 141 #if defined AUDIO_BREAKPOINT_ON_BUG
 142 #  if defined HOST_I386
 143 #    if defined __GNUC__
 144         __asm__ ("int3");
 145 #    elif defined _MSC_VER
 146         _asm _emit 0xcc;
 147 #    else
 148         abort ();
 149 #    endif
 150 #  else
 151         abort ();
 152 #  endif
 153 #endif
 154     }
 155
 156     return cond;
 157 }
 158 #endif
 159
 160 static inline int audio_bits_to_index (int bits)
 161 {
 162     switch (bits) {
 163     case 8:
 164         return 0;
 165
 166     case 16:
 167         return 1;
 168
 169     case 32:
 170         return 2;
 171
 172     default:
 173         audio_bug ("bits_to_index", 1);
 174         AUD_log (NULL, "invalid bits %d\n", bits);
 175         return 0;
 176     }
 177 }
 178
 179 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 180 {
 181     int cond;
 182     size_t len;
 183
 184     len = nmemb * size;
 185     cond = !nmemb || !size;
 186     cond |= nmemb < 0;
 187     cond |= len < size;
 188
 189     if (audio_bug ("audio_calloc", cond)) {
 190         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 191                  funcname);
 192         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 193         return NULL;
 194     }
 195
 196     return qemu_mallocz (len);
 197 }
 198
 199 static char *audio_alloc_prefix (const char *s)
 200 {
 201     const char qemu_prefix[] = "QEMU_";
 202     size_t len, i;
 203     char *r, *u;
 204
 205     if (!s) {
 206         return NULL;
 207     }
 208
 209     len = strlen (s);
 210     r = qemu_malloc (len + sizeof (qemu_prefix));
 211
 212     u = r + sizeof (qemu_prefix) - 1;
 213
 214     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 215     pstrcat (r, len + sizeof (qemu_prefix), s);
 216
 217     for (i = 0; i < len; ++i) {
 218         u[i] = qemu_toupper(u[i]);
 219     }
 220
 221     return r;
 222 }
 223
 224 static const char *audio_audfmt_to_string (audfmt_e fmt)
 225 {
 226     switch (fmt) {
 227     case AUD_FMT_U8:
 228         return "U8";
 229
 230     case AUD_FMT_U16:
 231         return "U16";
 232
 233     case AUD_FMT_S8:
 234         return "S8";
 235
 236     case AUD_FMT_S16:
 237         return "S16";
 238
 239     case AUD_FMT_U32:
 240         return "U32";
 241
 242     case AUD_FMT_S32:
 243         return "S32";
 244     }
 245
 246     dolog ("Bogus audfmt %d returning S16\n", fmt);
 247     return "S16";
 248 }
 249
 250 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 251                                         int *defaultp)
 252 {
 253     if (!strcasecmp (s, "u8")) {
 254         *defaultp = 0;
 255         return AUD_FMT_U8;
 256     }
 257     else if (!strcasecmp (s, "u16")) {
 258         *defaultp = 0;
 259         return AUD_FMT_U16;
 260     }
 261     else if (!strcasecmp (s, "u32")) {
 262         *defaultp = 0;
 263         return AUD_FMT_U32;
 264     }
 265     else if (!strcasecmp (s, "s8")) {
 266         *defaultp = 0;
 267         return AUD_FMT_S8;
 268     }
 269     else if (!strcasecmp (s, "s16")) {
 270         *defaultp = 0;
 271         return AUD_FMT_S16;
 272     }
 273     else if (!strcasecmp (s, "s32")) {
 274         *defaultp = 0;
 275         return AUD_FMT_S32;
 276     }
 277     else {
 278         dolog ("Bogus audio format `%s' using %s\n",
 279                s, audio_audfmt_to_string (defval));
 280         *defaultp = 1;
 281         return defval;
 282     }
 283 }
 284
 285 static audfmt_e audio_get_conf_fmt (const char *envname,
 286                                     audfmt_e defval,
 287                                     int *defaultp)
 288 {
 289     const char *var = getenv (envname);
 290     if (!var) {
 291         *defaultp = 1;
 292         return defval;
 293     }
 294     return audio_string_to_audfmt (var, defval, defaultp);
 295 }
 296
 297 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 298 {
 299     int val;
 300     char *strval;
 301
 302     strval = getenv (key);
 303     if (strval) {
 304         *defaultp = 0;
 305         val = atoi (strval);
 306         return val;
 307     }
 308     else {
 309         *defaultp = 1;
 310         return defval;
 311     }
 312 }
 313
 314 static const char *audio_get_conf_str (const char *key,
 315                                        const char *defval,
 316                                        int *defaultp)
 317 {
 318     const char *val = getenv (key);
 319     if (!val) {
 320         *defaultp = 1;
 321         return defval;
 322     }
 323     else {
 324         *defaultp = 0;
 325         return val;
 326     }
 327 }
 328
 329 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 330 {
 331     if (conf.log_to_monitor) {
 332         if (cap) {
 333             monitor_printf(default_mon, "%s: ", cap);
 334         }
 335
 336         monitor_vprintf(default_mon, fmt, ap);
 337     }
 338     else {
 339         if (cap) {
 340             fprintf (stderr, "%s: ", cap);
 341         }
 342
 343         vfprintf (stderr, fmt, ap);
 344     }
 345 }
 346
 347 void AUD_log (const char *cap, const char *fmt, ...)
 348 {
 349     va_list ap;
 350
 351     va_start (ap, fmt);
 352     AUD_vlog (cap, fmt, ap);
 353     va_end (ap);
 354 }
 355
 356 static void audio_print_options (const char *prefix,
 357                                  struct audio_option *opt)
 358 {
 359     char *uprefix;
 360
 361     if (!prefix) {
 362         dolog ("No prefix specified\n");
 363         return;
 364     }
 365
 366     if (!opt) {
 367         dolog ("No options\n");
 368         return;
 369     }
 370
 371     uprefix = audio_alloc_prefix (prefix);
 372
 373     for (; opt->name; opt++) {
 374         const char *state = "default";
 375         printf ("  %s_%s: ", uprefix, opt->name);
 376
 377         if (opt->overriddenp && *opt->overriddenp) {
 378             state = "current";
 379         }
 380
 381         switch (opt->tag) {
 382         case AUD_OPT_BOOL:
 383             {
 384                 int *intp = opt->valp;
 385                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 386             }
 387             break;
 388
 389         case AUD_OPT_INT:
 390             {
 391                 int *intp = opt->valp;
 392                 printf ("integer, %s = %d\n", state, *intp);
 393             }
 394             break;
 395
 396         case AUD_OPT_FMT:
 397             {
 398                 audfmt_e *fmtp = opt->valp;
 399                 printf (
 400                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 401                     state,
 402                     audio_audfmt_to_string (*fmtp)
 403                     );
 404             }
 405             break;
 406
 407         case AUD_OPT_STR:
 408             {
 409                 const char **strp = opt->valp;
 410                 printf ("string, %s = %s\n",
 411                         state,
 412                         *strp ? *strp : "(not set)");
 413             }
 414             break;
 415
 416         default:
 417             printf ("???\n");
 418             dolog ("Bad value tag for option %s_%s %d\n",
 419                    uprefix, opt->name, opt->tag);
 420             break;
 421         }
 422         printf ("    %s\n", opt->descr);
 423     }
 424
 425     qemu_free (uprefix);
 426 }
 427
 428 static void audio_process_options (const char *prefix,
 429                                    struct audio_option *opt)
 430 {
 431     char *optname;
 432     const char qemu_prefix[] = "QEMU_";
 433     size_t preflen, optlen;
 434
 435     if (audio_bug (AUDIO_FUNC, !prefix)) {
 436         dolog ("prefix = NULL\n");
 437         return;
 438     }
 439
 440     if (audio_bug (AUDIO_FUNC, !opt)) {
 441         dolog ("opt = NULL\n");
 442         return;
 443     }
 444
 445     preflen = strlen (prefix);
 446
 447     for (; opt->name; opt++) {
 448         size_t len, i;
 449         int def;
 450
 451         if (!opt->valp) {
 452             dolog ("Option value pointer for `%s' is not set\n",
 453                    opt->name);
 454             continue;
 455         }
 456
 457         len = strlen (opt->name);
 458         /* len of opt->name + len of prefix + size of qemu_prefix
 459          * (includes trailing zero) + zero + underscore (on behalf of
 460          * sizeof) */
 461         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 462         optname = qemu_malloc (optlen);
 463
 464         pstrcpy (optname, optlen, qemu_prefix);
 465
 466         /* copy while upper-casing, including trailing zero */
 467         for (i = 0; i <= preflen; ++i) {
 468             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 469         }
 470         pstrcat (optname, optlen, "_");
 471         pstrcat (optname, optlen, opt->name);
 472
 473         def = 1;
 474         switch (opt->tag) {
 475         case AUD_OPT_BOOL:
 476         case AUD_OPT_INT:
 477             {
 478                 int *intp = opt->valp;
 479                 *intp = audio_get_conf_int (optname, *intp, &def);
 480             }
 481             break;
 482
 483         case AUD_OPT_FMT:
 484             {
 485                 audfmt_e *fmtp = opt->valp;
 486                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 487             }
 488             break;
 489
 490         case AUD_OPT_STR:
 491             {
 492                 const char **strp = opt->valp;
 493                 *strp = audio_get_conf_str (optname, *strp, &def);
 494             }
 495             break;
 496
 497         default:
 498             dolog ("Bad value tag for option `%s' - %d\n",
 499                    optname, opt->tag);
 500             break;
 501         }
 502
 503         if (!opt->overriddenp) {
 504             opt->overriddenp = &opt->overridden;
 505         }
 506         *opt->overriddenp = !def;
 507         qemu_free (optname);
 508     }
 509 }
 510
 511 static void audio_print_settings (struct audsettings *as)
 512 {
 513     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 514
 515     switch (as->fmt) {
 516     case AUD_FMT_S8:
 517         AUD_log (NULL, "S8");
 518         break;
 519     case AUD_FMT_U8:
 520         AUD_log (NULL, "U8");
 521         break;
 522     case AUD_FMT_S16:
 523         AUD_log (NULL, "S16");
 524         break;
 525     case AUD_FMT_U16:
 526         AUD_log (NULL, "U16");
 527         break;
 528     case AUD_FMT_S32:
 529         AUD_log (NULL, "S32");
 530         break;
 531     case AUD_FMT_U32:
 532         AUD_log (NULL, "U32");
 533         break;
 534     default:
 535         AUD_log (NULL, "invalid(%d)", as->fmt);
 536         break;
 537     }
 538
 539     AUD_log (NULL, " endianness=");
 540     switch (as->endianness) {
 541     case 0:
 542         AUD_log (NULL, "little");
 543         break;
 544     case 1:
 545         AUD_log (NULL, "big");
 546         break;
 547     default:
 548         AUD_log (NULL, "invalid");
 549         break;
 550     }
 551     AUD_log (NULL, "\n");
 552 }
 553
 554 static int audio_validate_settings (struct audsettings *as)
 555 {
 556     int invalid;
 557
 558     invalid = as->nchannels != 1 && as->nchannels != 2;
 559     invalid |= as->endianness != 0 && as->endianness != 1;
 560
 561     switch (as->fmt) {
 562     case AUD_FMT_S8:
 563     case AUD_FMT_U8:
 564     case AUD_FMT_S16:
 565     case AUD_FMT_U16:
 566     case AUD_FMT_S32:
 567     case AUD_FMT_U32:
 568         break;
 569     default:
 570         invalid = 1;
 571         break;
 572     }
 573
 574     invalid |= as->freq <= 0;
 575     return invalid ? -1 : 0;
 576 }
 577
 578 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 579 {
 580     int bits = 8, sign = 0;
 581
 582     switch (as->fmt) {
 583     case AUD_FMT_S8:
 584         sign = 1;
 585     case AUD_FMT_U8:
 586         break;
 587
 588     case AUD_FMT_S16:
 589         sign = 1;
 590     case AUD_FMT_U16:
 591         bits = 16;
 592         break;
 593
 594     case AUD_FMT_S32:
 595         sign = 1;
 596     case AUD_FMT_U32:
 597         bits = 32;
 598         break;
 599     }
 600     return info->freq == as->freq
 601         && info->nchannels == as->nchannels
 602         && info->sign == sign
 603         && info->bits == bits
 604         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 605 }
 606
 607 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 608 {
 609     int bits = 8, sign = 0, shift = 0;
 610
 611     switch (as->fmt) {
 612     case AUD_FMT_S8:
 613         sign = 1;
 614     case AUD_FMT_U8:
 615         break;
 616
 617     case AUD_FMT_S16:
 618         sign = 1;
 619     case AUD_FMT_U16:
 620         bits = 16;
 621         shift = 1;
 622         break;
 623
 624     case AUD_FMT_S32:
 625         sign = 1;
 626     case AUD_FMT_U32:
 627         bits = 32;
 628         shift = 2;
 629         break;
 630     }
 631
 632     info->freq = as->freq;
 633     info->bits = bits;
 634     info->sign = sign;
 635     info->nchannels = as->nchannels;
 636     info->shift = (as->nchannels == 2) + shift;
 637     info->align = (1 << info->shift) - 1;
 638     info->bytes_per_second = info->freq << info->shift;
 639     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 640 }
 641
 642 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 643 {
 644     if (!len) {
 645         return;
 646     }
 647
 648     if (info->sign) {
 649         memset (buf, 0x00, len << info->shift);
 650     }
 651     else {
 652         switch (info->bits) {
 653         case 8:
 654             memset (buf, 0x80, len << info->shift);
 655             break;
 656
 657         case 16:
 658             {
 659                 int i;
 660                 uint16_t *p = buf;
 661                 int shift = info->nchannels - 1;
 662                 short s = INT16_MAX;
 663
 664                 if (info->swap_endianness) {
 665                     s = bswap16 (s);
 666                 }
 667
 668                 for (i = 0; i < len << shift; i++) {
 669                     p[i] = s;
 670                 }
 671             }
 672             break;
 673
 674         case 32:
 675             {
 676                 int i;
 677                 uint32_t *p = buf;
 678                 int shift = info->nchannels - 1;
 679                 int32_t s = INT32_MAX;
 680
 681                 if (info->swap_endianness) {
 682                     s = bswap32 (s);
 683                 }
 684
 685                 for (i = 0; i < len << shift; i++) {
 686                     p[i] = s;
 687                 }
 688             }
 689             break;
 690
 691         default:
 692             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 693                      info->bits);
 694             break;
 695         }
 696     }
 697 }
 698
 699 /*
 700  * Capture
 701  */
 702 static void noop_conv (struct st_sample *dst, const void *src,
 703                        int samples, struct mixeng_volume *vol)
 704 {
 705     (void) src;
 706     (void) dst;
 707     (void) samples;
 708     (void) vol;
 709 }
 710
 711 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 712     struct audsettings *as
 713     )
 714 {
 715     CaptureVoiceOut *cap;
 716     AudioState *s = &glob_audio_state;
 717
 718     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 719         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 720             return cap;
 721         }
 722     }
 723     return NULL;
 724 }
 725
 726 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 727 {
 728     struct capture_callback *cb;
 729
 730 #ifdef DEBUG_CAPTURE
 731     dolog ("notification %d sent\n", cmd);
 732 #endif
 733     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 734         cb->ops.notify (cb->opaque, cmd);
 735     }
 736 }
 737
 738 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 739 {
 740     if (cap->hw.enabled != enabled) {
 741         audcnotification_e cmd;
 742         cap->hw.enabled = enabled;
 743         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 744         audio_notify_capture (cap, cmd);
 745     }
 746 }
 747
 748 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 749 {
 750     HWVoiceOut *hw = &cap->hw;
 751     SWVoiceOut *sw;
 752     int enabled = 0;
 753
 754     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 755         if (sw->active) {
 756             enabled = 1;
 757             break;
 758         }
 759     }
 760     audio_capture_maybe_changed (cap, enabled);
 761 }
 762
 763 static void audio_detach_capture (HWVoiceOut *hw)
 764 {
 765     SWVoiceCap *sc = hw->cap_head.lh_first;
 766
 767     while (sc) {
 768         SWVoiceCap *sc1 = sc->entries.le_next;
 769         SWVoiceOut *sw = &sc->sw;
 770         CaptureVoiceOut *cap = sc->cap;
 771         int was_active = sw->active;
 772
 773         if (sw->rate) {
 774             st_rate_stop (sw->rate);
 775             sw->rate = NULL;
 776         }
 777
 778         QLIST_REMOVE (sw, entries);
 779         QLIST_REMOVE (sc, entries);
 780         qemu_free (sc);
 781         if (was_active) {
 782             /* We have removed soft voice from the capture:
 783                this might have changed the overall status of the capture
 784                since this might have been the only active voice */
 785             audio_recalc_and_notify_capture (cap);
 786         }
 787         sc = sc1;
 788     }
 789 }
 790
 791 static int audio_attach_capture (HWVoiceOut *hw)
 792 {
 793     AudioState *s = &glob_audio_state;
 794     CaptureVoiceOut *cap;
 795
 796     audio_detach_capture (hw);
 797     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 798         SWVoiceCap *sc;
 799         SWVoiceOut *sw;
 800         HWVoiceOut *hw_cap = &cap->hw;
 801
 802         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 803         if (!sc) {
 804             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 805                    sizeof (*sc));
 806             return -1;
 807         }
 808
 809         sc->cap = cap;
 810         sw = &sc->sw;
 811         sw->hw = hw_cap;
 812         sw->info = hw->info;
 813         sw->empty = 1;
 814         sw->active = hw->enabled;
 815         sw->conv = noop_conv;
 816         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 817         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 818         if (!sw->rate) {
 819             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 820             qemu_free (sw);
 821             return -1;
 822         }
 823         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 824         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 825 #ifdef DEBUG_CAPTURE
 826         asprintf (&sw->name, "for %p %d,%d,%d",
 827                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 828         dolog ("Added %s active = %d\n", sw->name, sw->active);
 829 #endif
 830         if (sw->active) {
 831             audio_capture_maybe_changed (cap, 1);
 832         }
 833     }
 834     return 0;
 835 }
 836
 837 /*
 838  * Hard voice (capture)
 839  */
 840 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 841 {
 842     SWVoiceIn *sw;
 843     int m = hw->total_samples_captured;
 844
 845     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 846         if (sw->active) {
 847             m = audio_MIN (m, sw->total_hw_samples_acquired);
 848         }
 849     }
 850     return m;
 851 }
 852
 853 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 854 {
 855     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 856     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 857         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 858         return 0;
 859     }
 860     return live;
 861 }
 862
 863 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 864                            int live, int pending)
 865 {
 866     int left = hw->samples - pending;
 867     int len = audio_MIN (left, live);
 868     int clipped = 0;
 869
 870     while (len) {
 871         struct st_sample *src = hw->mix_buf + hw->rpos;
 872         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 873         int samples_till_end_of_buf = hw->samples - hw->rpos;
 874         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 875
 876         hw->clip (dst, src, samples_to_clip);
 877
 878         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 879         len -= samples_to_clip;
 880         clipped += samples_to_clip;
 881     }
 882     return clipped;
 883 }
 884
 885 /*
 886  * Soft voice (capture)
 887  */
 888 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 889 {
 890     HWVoiceIn *hw = sw->hw;
 891     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 892     int rpos;
 893
 894     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 895         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 896         return 0;
 897     }
 898
 899     rpos = hw->wpos - live;
 900     if (rpos >= 0) {
 901         return rpos;
 902     }
 903     else {
 904         return hw->samples + rpos;
 905     }
 906 }
 907
 908 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 909 {
 910     HWVoiceIn *hw = sw->hw;
 911     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 912     struct st_sample *src, *dst = sw->buf;
 913
 914     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 915
 916     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 917     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 918         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 919         return 0;
 920     }
 921
 922     samples = size >> sw->info.shift;
 923     if (!live) {
 924         return 0;
 925     }
 926
 927     swlim = (live * sw->ratio) >> 32;
 928     swlim = audio_MIN (swlim, samples);
 929
 930     while (swlim) {
 931         src = hw->conv_buf + rpos;
 932         isamp = hw->wpos - rpos;
 933         /* XXX: <= ? */
 934         if (isamp <= 0) {
 935             isamp = hw->samples - rpos;
 936         }
 937
 938         if (!isamp) {
 939             break;
 940         }
 941         osamp = swlim;
 942
 943         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 944             dolog ("osamp=%d\n", osamp);
 945             return 0;
 946         }
 947
 948         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 949         swlim -= osamp;
 950         rpos = (rpos + isamp) % hw->samples;
 951         dst += osamp;
 952         ret += osamp;
 953         total += isamp;
 954     }
 955
 956     sw->clip (buf, sw->buf, ret);
 957     sw->total_hw_samples_acquired += total;
 958     return ret << sw->info.shift;
 959 }
 960
 961 /*
 962  * Hard voice (playback)
 963  */
 964 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 965 {
 966     SWVoiceOut *sw;
 967     int m = INT_MAX;
 968     int nb_live = 0;
 969
 970     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 971         if (sw->active || !sw->empty) {
 972             m = audio_MIN (m, sw->total_hw_samples_mixed);
 973             nb_live += 1;
 974         }
 975     }
 976
 977     *nb_livep = nb_live;
 978     return m;
 979 }
 980
 981 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 982 {
 983     int smin;
 984     int nb_live1;
 985
 986     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 987     if (nb_live) {
 988         *nb_live = nb_live1;
 989     }
 990
 991     if (nb_live1) {
 992         int live = smin;
 993
 994         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 995             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 996             return 0;
 997         }
 998         return live;
 999     }
1000     return 0;
1001 }
1002
1003 /*
1004  * Soft voice (playback)
1005  */
1006 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1007 {
1008     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1009     int ret = 0, pos = 0, total = 0;
1010
1011     if (!sw) {
1012         return size;
1013     }
1014
1015     hwsamples = sw->hw->samples;
1016
1017     live = sw->total_hw_samples_mixed;
1018     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1019         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1020         return 0;
1021     }
1022
1023     if (live == hwsamples) {
1024 #ifdef DEBUG_OUT
1025         dolog ("%s is full %d\n", sw->name, live);
1026 #endif
1027         return 0;
1028     }
1029
1030     wpos = (sw->hw->rpos + live) % hwsamples;
1031     samples = size >> sw->info.shift;
1032
1033     dead = hwsamples - live;
1034     swlim = ((int64_t) dead << 32) / sw->ratio;
1035     swlim = audio_MIN (swlim, samples);
1036     if (swlim) {
1037         sw->conv (sw->buf, buf, swlim, &sw->vol);
1038     }
1039
1040     while (swlim) {
1041         dead = hwsamples - live;
1042         left = hwsamples - wpos;
1043         blck = audio_MIN (dead, left);
1044         if (!blck) {
1045             break;
1046         }
1047         isamp = swlim;
1048         osamp = blck;
1049         st_rate_flow_mix (
1050             sw->rate,
1051             sw->buf + pos,
1052             sw->hw->mix_buf + wpos,
1053             &isamp,
1054             &osamp
1055             );
1056         ret += isamp;
1057         swlim -= isamp;
1058         pos += isamp;
1059         live += osamp;
1060         wpos = (wpos + osamp) % hwsamples;
1061         total += osamp;
1062     }
1063
1064     sw->total_hw_samples_mixed += total;
1065     sw->empty = sw->total_hw_samples_mixed == 0;
1066
1067 #ifdef DEBUG_OUT
1068     dolog (
1069         "%s: write size %d ret %d total sw %d\n",
1070         SW_NAME (sw),
1071         size >> sw->info.shift,
1072         ret,
1073         sw->total_hw_samples_mixed
1074         );
1075 #endif
1076
1077     return ret << sw->info.shift;
1078 }
1079
1080 #ifdef DEBUG_AUDIO
1081 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1082 {
1083     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1084            cap, info->bits, info->sign, info->freq, info->nchannels);
1085 }
1086 #endif
1087
1088 #define DAC
1089 #include "audio_template.h"
1090 #undef DAC
1091 #include "audio_template.h"
1092
1093 /*
1094  * Timer
1095  */
1096 static void audio_timer (void *opaque)
1097 {
1098     AudioState *s = opaque;
1099
1100     audio_run ("timer");
1101     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1102 }
1103
1104
1105 static int audio_is_timer_needed (void)
1106 {
1107     HWVoiceIn *hwi = NULL;
1108     HWVoiceOut *hwo = NULL;
1109
1110     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1111         if (!hwo->poll_mode) return 1;
1112     }
1113     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1114         if (!hwi->poll_mode) return 1;
1115     }
1116     return 0;
1117 }
1118
1119 static void audio_reset_timer (void)
1120 {
1121     AudioState *s = &glob_audio_state;
1122
1123     if (audio_is_timer_needed ()) {
1124         qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
1125     }
1126     else {
1127         qemu_del_timer (s->ts);
1128     }
1129 }
1130
1131 /*
1132  * Public API
1133  */
1134 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1135 {
1136     int bytes;
1137
1138     if (!sw) {
1139         /* XXX: Consider options */
1140         return size;
1141     }
1142
1143     if (!sw->hw->enabled) {
1144         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1145         return 0;
1146     }
1147
1148     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1149     return bytes;
1150 }
1151
1152 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1153 {
1154     int bytes;
1155
1156     if (!sw) {
1157         /* XXX: Consider options */
1158         return size;
1159     }
1160
1161     if (!sw->hw->enabled) {
1162         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1163         return 0;
1164     }
1165
1166     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1167     return bytes;
1168 }
1169
1170 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1171 {
1172     return sw->hw->samples << sw->hw->info.shift;
1173 }
1174
1175 void AUD_set_active_out (SWVoiceOut *sw, int on)
1176 {
1177     HWVoiceOut *hw;
1178
1179     if (!sw) {
1180         return;
1181     }
1182
1183     hw = sw->hw;
1184     if (sw->active != on) {
1185         AudioState *s = &glob_audio_state;
1186         SWVoiceOut *temp_sw;
1187         SWVoiceCap *sc;
1188
1189         if (on) {
1190             hw->pending_disable = 0;
1191             if (!hw->enabled) {
1192                 hw->enabled = 1;
1193                 if (s->vm_running) {
1194                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1195                     audio_reset_timer ();
1196                 }
1197             }
1198         }
1199         else {
1200             if (hw->enabled) {
1201                 int nb_active = 0;
1202
1203                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1204                      temp_sw = temp_sw->entries.le_next) {
1205                     nb_active += temp_sw->active != 0;
1206                 }
1207
1208                 hw->pending_disable = nb_active == 1;
1209             }
1210         }
1211
1212         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1213             sc->sw.active = hw->enabled;
1214             if (hw->enabled) {
1215                 audio_capture_maybe_changed (sc->cap, 1);
1216             }
1217         }
1218         sw->active = on;
1219     }
1220 }
1221
1222 void AUD_set_active_in (SWVoiceIn *sw, int on)
1223 {
1224     HWVoiceIn *hw;
1225
1226     if (!sw) {
1227         return;
1228     }
1229
1230     hw = sw->hw;
1231     if (sw->active != on) {
1232         AudioState *s = &glob_audio_state;
1233         SWVoiceIn *temp_sw;
1234
1235         if (on) {
1236             if (!hw->enabled) {
1237                 hw->enabled = 1;
1238                 if (s->vm_running) {
1239                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1240                 }
1241             }
1242             sw->total_hw_samples_acquired = hw->total_samples_captured;
1243         }
1244         else {
1245             if (hw->enabled) {
1246                 int nb_active = 0;
1247
1248                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1249                      temp_sw = temp_sw->entries.le_next) {
1250                     nb_active += temp_sw->active != 0;
1251                 }
1252
1253                 if (nb_active == 1) {
1254                     hw->enabled = 0;
1255                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1256                 }
1257             }
1258         }
1259         sw->active = on;
1260     }
1261 }
1262
1263 static int audio_get_avail (SWVoiceIn *sw)
1264 {
1265     int live;
1266
1267     if (!sw) {
1268         return 0;
1269     }
1270
1271     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1272     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1273         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1274         return 0;
1275     }
1276
1277     ldebug (
1278         "%s: get_avail live %d ret %" PRId64 "\n",
1279         SW_NAME (sw),
1280         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1281         );
1282
1283     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1284 }
1285
1286 static int audio_get_free (SWVoiceOut *sw)
1287 {
1288     int live, dead;
1289
1290     if (!sw) {
1291         return 0;
1292     }
1293
1294     live = sw->total_hw_samples_mixed;
1295
1296     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1297         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1298         return 0;
1299     }
1300
1301     dead = sw->hw->samples - live;
1302
1303 #ifdef DEBUG_OUT
1304     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1305            SW_NAME (sw),
1306            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1307 #endif
1308
1309     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1310 }
1311
1312 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1313 {
1314     int n;
1315
1316     if (hw->enabled) {
1317         SWVoiceCap *sc;
1318
1319         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1320             SWVoiceOut *sw = &sc->sw;
1321             int rpos2 = rpos;
1322
1323             n = samples;
1324             while (n) {
1325                 int till_end_of_hw = hw->samples - rpos2;
1326                 int to_write = audio_MIN (till_end_of_hw, n);
1327                 int bytes = to_write << hw->info.shift;
1328                 int written;
1329
1330                 sw->buf = hw->mix_buf + rpos2;
1331                 written = audio_pcm_sw_write (sw, NULL, bytes);
1332                 if (written - bytes) {
1333                     dolog ("Could not mix %d bytes into a capture "
1334                            "buffer, mixed %d\n",
1335                            bytes, written);
1336                     break;
1337                 }
1338                 n -= to_write;
1339                 rpos2 = (rpos2 + to_write) % hw->samples;
1340             }
1341         }
1342     }
1343
1344     n = audio_MIN (samples, hw->samples - rpos);
1345     mixeng_clear (hw->mix_buf + rpos, n);
1346     mixeng_clear (hw->mix_buf, samples - n);
1347 }
1348
1349 static void audio_run_out (AudioState *s)
1350 {
1351     HWVoiceOut *hw = NULL;
1352     SWVoiceOut *sw;
1353
1354     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1355         int played;
1356         int live, free, nb_live, cleanup_required, prev_rpos;
1357
1358         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1359         if (!nb_live) {
1360             live = 0;
1361         }
1362
1363         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1364             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1365             continue;
1366         }
1367
1368         if (hw->pending_disable && !nb_live) {
1369             SWVoiceCap *sc;
1370 #ifdef DEBUG_OUT
1371             dolog ("Disabling voice\n");
1372 #endif
1373             hw->enabled = 0;
1374             hw->pending_disable = 0;
1375             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1376             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1377                 sc->sw.active = 0;
1378                 audio_recalc_and_notify_capture (sc->cap);
1379             }
1380             continue;
1381         }
1382
1383         if (!live) {
1384             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1385                 if (sw->active) {
1386                     free = audio_get_free (sw);
1387                     if (free > 0) {
1388                         sw->callback.fn (sw->callback.opaque, free);
1389                     }
1390                 }
1391             }
1392             continue;
1393         }
1394
1395         prev_rpos = hw->rpos;
1396         played = hw->pcm_ops->run_out (hw, live);
1397         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1398             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1399                    hw->rpos, hw->samples, played);
1400             hw->rpos = 0;
1401         }
1402
1403 #ifdef DEBUG_OUT
1404         dolog ("played=%d\n", played);
1405 #endif
1406
1407         if (played) {
1408             hw->ts_helper += played;
1409             audio_capture_mix_and_clear (hw, prev_rpos, played);
1410         }
1411
1412         cleanup_required = 0;
1413         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1414             if (!sw->active && sw->empty) {
1415                 continue;
1416             }
1417
1418             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1419                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1420                        played, sw->total_hw_samples_mixed);
1421                 played = sw->total_hw_samples_mixed;
1422             }
1423
1424             sw->total_hw_samples_mixed -= played;
1425
1426             if (!sw->total_hw_samples_mixed) {
1427                 sw->empty = 1;
1428                 cleanup_required |= !sw->active && !sw->callback.fn;
1429             }
1430
1431             if (sw->active) {
1432                 free = audio_get_free (sw);
1433                 if (free > 0) {
1434                     sw->callback.fn (sw->callback.opaque, free);
1435                 }
1436             }
1437         }
1438
1439         if (cleanup_required) {
1440             SWVoiceOut *sw1;
1441
1442             sw = hw->sw_head.lh_first;
1443             while (sw) {
1444                 sw1 = sw->entries.le_next;
1445                 if (!sw->active && !sw->callback.fn) {
1446 #ifdef DEBUG_PLIVE
1447                     dolog ("Finishing with old voice\n");
1448 #endif
1449                     audio_close_out (sw);
1450                 }
1451                 sw = sw1;
1452             }
1453         }
1454     }
1455 }
1456
1457 static void audio_run_in (AudioState *s)
1458 {
1459     HWVoiceIn *hw = NULL;
1460
1461     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1462         SWVoiceIn *sw;
1463         int captured, min;
1464
1465         captured = hw->pcm_ops->run_in (hw);
1466
1467         min = audio_pcm_hw_find_min_in (hw);
1468         hw->total_samples_captured += captured - min;
1469         hw->ts_helper += captured;
1470
1471         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1472             sw->total_hw_samples_acquired -= min;
1473
1474             if (sw->active) {
1475                 int avail;
1476
1477                 avail = audio_get_avail (sw);
1478                 if (avail > 0) {
1479                     sw->callback.fn (sw->callback.opaque, avail);
1480                 }
1481             }
1482         }
1483     }
1484 }
1485
1486 static void audio_run_capture (AudioState *s)
1487 {
1488     CaptureVoiceOut *cap;
1489
1490     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1491         int live, rpos, captured;
1492         HWVoiceOut *hw = &cap->hw;
1493         SWVoiceOut *sw;
1494
1495         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1496         rpos = hw->rpos;
1497         while (live) {
1498             int left = hw->samples - rpos;
1499             int to_capture = audio_MIN (live, left);
1500             struct st_sample *src;
1501             struct capture_callback *cb;
1502
1503             src = hw->mix_buf + rpos;
1504             hw->clip (cap->buf, src, to_capture);
1505             mixeng_clear (src, to_capture);
1506
1507             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1508                 cb->ops.capture (cb->opaque, cap->buf,
1509                                  to_capture << hw->info.shift);
1510             }
1511             rpos = (rpos + to_capture) % hw->samples;
1512             live -= to_capture;
1513         }
1514         hw->rpos = rpos;
1515
1516         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1517             if (!sw->active && sw->empty) {
1518                 continue;
1519             }
1520
1521             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1522                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1523                        captured, sw->total_hw_samples_mixed);
1524                 captured = sw->total_hw_samples_mixed;
1525             }
1526
1527             sw->total_hw_samples_mixed -= captured;
1528             sw->empty = sw->total_hw_samples_mixed == 0;
1529         }
1530     }
1531 }
1532
1533 void audio_run (const char *msg)
1534 {
1535     AudioState *s = &glob_audio_state;
1536
1537     audio_run_out (s);
1538     audio_run_in (s);
1539     audio_run_capture (s);
1540 #ifdef DEBUG_POLL
1541     {
1542         static double prevtime;
1543         double currtime;
1544         struct timeval tv;
1545
1546         if (gettimeofday (&tv, NULL)) {
1547             perror ("audio_run: gettimeofday");
1548             return;
1549         }
1550
1551         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1552         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1553         prevtime = currtime;
1554     }
1555 #endif
1556 }
1557
1558 static struct audio_option audio_options[] = {
1559     /* DAC */
1560     {
1561         .name  = "DAC_FIXED_SETTINGS",
1562         .tag   = AUD_OPT_BOOL,
1563         .valp  = &conf.fixed_out.enabled,
1564         .descr = "Use fixed settings for host DAC"
1565     },
1566     {
1567         .name  = "DAC_FIXED_FREQ",
1568         .tag   = AUD_OPT_INT,
1569         .valp  = &conf.fixed_out.settings.freq,
1570         .descr = "Frequency for fixed host DAC"
1571     },
1572     {
1573         .name  = "DAC_FIXED_FMT",
1574         .tag   = AUD_OPT_FMT,
1575         .valp  = &conf.fixed_out.settings.fmt,
1576         .descr = "Format for fixed host DAC"
1577     },
1578     {
1579         .name  = "DAC_FIXED_CHANNELS",
1580         .tag   = AUD_OPT_INT,
1581         .valp  = &conf.fixed_out.settings.nchannels,
1582         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1583     },
1584     {
1585         .name  = "DAC_VOICES",
1586         .tag   = AUD_OPT_INT,
1587         .valp  = &conf.fixed_out.nb_voices,
1588         .descr = "Number of voices for DAC"
1589     },
1590     {
1591         .name  = "DAC_TRY_POLL",
1592         .tag   = AUD_OPT_BOOL,
1593         .valp  = &conf.try_poll_out,
1594         .descr = "Attempt using poll mode for DAC"
1595     },
1596     /* ADC */
1597     {
1598         .name  = "ADC_FIXED_SETTINGS",
1599         .tag   = AUD_OPT_BOOL,
1600         .valp  = &conf.fixed_in.enabled,
1601         .descr = "Use fixed settings for host ADC"
1602     },
1603     {
1604         .name  = "ADC_FIXED_FREQ",
1605         .tag   = AUD_OPT_INT,
1606         .valp  = &conf.fixed_in.settings.freq,
1607         .descr = "Frequency for fixed host ADC"
1608     },
1609     {
1610         .name  = "ADC_FIXED_FMT",
1611         .tag   = AUD_OPT_FMT,
1612         .valp  = &conf.fixed_in.settings.fmt,
1613         .descr = "Format for fixed host ADC"
1614     },
1615     {
1616         .name  = "ADC_FIXED_CHANNELS",
1617         .tag   = AUD_OPT_INT,
1618         .valp  = &conf.fixed_in.settings.nchannels,
1619         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1620     },
1621     {
1622         .name  = "ADC_VOICES",
1623         .tag   = AUD_OPT_INT,
1624         .valp  = &conf.fixed_in.nb_voices,
1625         .descr = "Number of voices for ADC"
1626     },
1627     {
1628         .name  = "ADC_TRY_POLL",
1629         .tag   = AUD_OPT_BOOL,
1630         .valp  = &conf.try_poll_in,
1631         .descr = "Attempt using poll mode for ADC"
1632     },
1633     /* Misc */
1634     {
1635         .name  = "TIMER_PERIOD",
1636         .tag   = AUD_OPT_INT,
1637         .valp  = &conf.period.hertz,
1638         .descr = "Timer period in HZ (0 - use lowest possible)"
1639     },
1640     {
1641         .name  = "PLIVE",
1642         .tag   = AUD_OPT_BOOL,
1643         .valp  = &conf.plive,
1644         .descr = "(undocumented)"
1645     },
1646     {
1647         .name  = "LOG_TO_MONITOR",
1648         .tag   = AUD_OPT_BOOL,
1649         .valp  = &conf.log_to_monitor,
1650         .descr = "Print logging messages to monitor instead of stderr"
1651     },
1652     { /* End of list */ }
1653 };
1654
1655 static void audio_pp_nb_voices (const char *typ, int nb)
1656 {
1657     switch (nb) {
1658     case 0:
1659         printf ("Does not support %s\n", typ);
1660         break;
1661     case 1:
1662         printf ("One %s voice\n", typ);
1663         break;
1664     case INT_MAX:
1665         printf ("Theoretically supports many %s voices\n", typ);
1666         break;
1667     default:
1668         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1669         break;
1670     }
1671
1672 }
1673
1674 void AUD_help (void)
1675 {
1676     size_t i;
1677
1678     audio_process_options ("AUDIO", audio_options);
1679     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1680         struct audio_driver *d = drvtab[i];
1681         if (d->options) {
1682             audio_process_options (d->name, d->options);
1683         }
1684     }
1685
1686     printf ("Audio options:\n");
1687     audio_print_options ("AUDIO", audio_options);
1688     printf ("\n");
1689
1690     printf ("Available drivers:\n");
1691
1692     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1693         struct audio_driver *d = drvtab[i];
1694
1695         printf ("Name: %s\n", d->name);
1696         printf ("Description: %s\n", d->descr);
1697
1698         audio_pp_nb_voices ("playback", d->max_voices_out);
1699         audio_pp_nb_voices ("capture", d->max_voices_in);
1700
1701         if (d->options) {
1702             printf ("Options:\n");
1703             audio_print_options (d->name, d->options);
1704         }
1705         else {
1706             printf ("No options\n");
1707         }
1708         printf ("\n");
1709     }
1710
1711     printf (
1712         "Options are settable through environment variables.\n"
1713         "Example:\n"
1714 #ifdef _WIN32
1715         "  set QEMU_AUDIO_DRV=wav\n"
1716         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1717 #else
1718         "  export QEMU_AUDIO_DRV=wav\n"
1719         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1720         "(for csh replace export with setenv in the above)\n"
1721 #endif
1722         "  qemu ...\n\n"
1723         );
1724 }
1725
1726 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1727 {
1728     if (drv->options) {
1729         audio_process_options (drv->name, drv->options);
1730     }
1731     s->drv_opaque = drv->init ();
1732
1733     if (s->drv_opaque) {
1734         audio_init_nb_voices_out (drv);
1735         audio_init_nb_voices_in (drv);
1736         s->drv = drv;
1737         return 0;
1738     }
1739     else {
1740         dolog ("Could not init `%s' audio driver\n", drv->name);
1741         return -1;
1742     }
1743 }
1744
1745 static void audio_vm_change_state_handler (void *opaque, int running,
1746                                            int reason)
1747 {
1748     AudioState *s = opaque;
1749     HWVoiceOut *hwo = NULL;
1750     HWVoiceIn *hwi = NULL;
1751     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1752
1753     s->vm_running = running;
1754     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1755         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1756     }
1757
1758     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1759         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1760     }
1761     audio_reset_timer ();
1762 }
1763
1764 static void audio_atexit (void)
1765 {
1766     AudioState *s = &glob_audio_state;
1767     HWVoiceOut *hwo = NULL;
1768     HWVoiceIn *hwi = NULL;
1769
1770     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1771         SWVoiceCap *sc;
1772
1773         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1774         hwo->pcm_ops->fini_out (hwo);
1775
1776         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1777             CaptureVoiceOut *cap = sc->cap;
1778             struct capture_callback *cb;
1779
1780             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1781                 cb->ops.destroy (cb->opaque);
1782             }
1783         }
1784     }
1785
1786     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1787         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1788         hwi->pcm_ops->fini_in (hwi);
1789     }
1790
1791     if (s->drv) {
1792         s->drv->fini (s->drv_opaque);
1793     }
1794 }
1795
1796 static const VMStateDescription vmstate_audio = {
1797     .name = "audio",
1798     .version_id = 1,
1799     .minimum_version_id = 1,
1800     .minimum_version_id_old = 1,
1801     .fields      = (VMStateField []) {
1802         VMSTATE_END_OF_LIST()
1803     }
1804 };
1805
1806 static void audio_init (void)
1807 {
1808     size_t i;
1809     int done = 0;
1810     const char *drvname;
1811     VMChangeStateEntry *e;
1812     AudioState *s = &glob_audio_state;
1813
1814     if (s->drv) {
1815         return;
1816     }
1817
1818     QLIST_INIT (&s->hw_head_out);
1819     QLIST_INIT (&s->hw_head_in);
1820     QLIST_INIT (&s->cap_head);
1821     atexit (audio_atexit);
1822
1823     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1824     if (!s->ts) {
1825         hw_error("Could not create audio timer\n");
1826     }
1827
1828     audio_process_options ("AUDIO", audio_options);
1829
1830     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1831     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1832
1833     if (s->nb_hw_voices_out <= 0) {
1834         dolog ("Bogus number of playback voices %d, setting to 1\n",
1835                s->nb_hw_voices_out);
1836         s->nb_hw_voices_out = 1;
1837     }
1838
1839     if (s->nb_hw_voices_in <= 0) {
1840         dolog ("Bogus number of capture voices %d, setting to 0\n",
1841                s->nb_hw_voices_in);
1842         s->nb_hw_voices_in = 0;
1843     }
1844
1845     {
1846         int def;
1847         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1848     }
1849
1850     if (drvname) {
1851         int found = 0;
1852
1853         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1854             if (!strcmp (drvname, drvtab[i]->name)) {
1855                 done = !audio_driver_init (s, drvtab[i]);
1856                 found = 1;
1857                 break;
1858             }
1859         }
1860
1861         if (!found) {
1862             dolog ("Unknown audio driver `%s'\n", drvname);
1863             dolog ("Run with -audio-help to list available drivers\n");
1864         }
1865     }
1866
1867     if (!done) {
1868         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1869             if (drvtab[i]->can_be_default) {
1870                 done = !audio_driver_init (s, drvtab[i]);
1871             }
1872         }
1873     }
1874
1875     if (!done) {
1876         done = !audio_driver_init (s, &no_audio_driver);
1877         if (!done) {
1878             hw_error("Could not initialize audio subsystem\n");
1879         }
1880         else {
1881             dolog ("warning: Using timer based audio emulation\n");
1882         }
1883     }
1884
1885     if (conf.period.hertz <= 0) {
1886         if (conf.period.hertz < 0) {
1887             dolog ("warning: Timer period is negative - %d "
1888                    "treating as zero\n",
1889                    conf.period.hertz);
1890         }
1891         conf.period.ticks = 1;
1892     } else {
1893         conf.period.ticks =
1894             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1895     }
1896
1897     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1898     if (!e) {
1899         dolog ("warning: Could not register change state handler\n"
1900                "(Audio can continue looping even after stopping the VM)\n");
1901     }
1902
1903     QLIST_INIT (&s->card_head);
1904     vmstate_register (0, &vmstate_audio, s);
1905 }
1906
1907 void AUD_register_card (const char *name, QEMUSoundCard *card)
1908 {
1909     audio_init ();
1910     card->name = qemu_strdup (name);
1911     memset (&card->entries, 0, sizeof (card->entries));
1912     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1913 }
1914
1915 void AUD_remove_card (QEMUSoundCard *card)
1916 {
1917     QLIST_REMOVE (card, entries);
1918     qemu_free (card->name);
1919 }
1920
1921
1922 CaptureVoiceOut *AUD_add_capture (
1923     struct audsettings *as,
1924     struct audio_capture_ops *ops,
1925     void *cb_opaque
1926     )
1927 {
1928     AudioState *s = &glob_audio_state;
1929     CaptureVoiceOut *cap;
1930     struct capture_callback *cb;
1931
1932     if (audio_validate_settings (as)) {
1933         dolog ("Invalid settings were passed when trying to add capture\n");
1934         audio_print_settings (as);
1935         goto err0;
1936     }
1937
1938     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1939     if (!cb) {
1940         dolog ("Could not allocate capture callback information, size %zu\n",
1941                sizeof (*cb));
1942         goto err0;
1943     }
1944     cb->ops = *ops;
1945     cb->opaque = cb_opaque;
1946
1947     cap = audio_pcm_capture_find_specific (as);
1948     if (cap) {
1949         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1950         return cap;
1951     }
1952     else {
1953         HWVoiceOut *hw;
1954         CaptureVoiceOut *cap;
1955
1956         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1957         if (!cap) {
1958             dolog ("Could not allocate capture voice, size %zu\n",
1959                    sizeof (*cap));
1960             goto err1;
1961         }
1962
1963         hw = &cap->hw;
1964         QLIST_INIT (&hw->sw_head);
1965         QLIST_INIT (&cap->cb_head);
1966
1967         /* XXX find a more elegant way */
1968         hw->samples = 4096 * 4;
1969         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1970                                     sizeof (struct st_sample));
1971         if (!hw->mix_buf) {
1972             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1973                    hw->samples);
1974             goto err2;
1975         }
1976
1977         audio_pcm_init_info (&hw->info, as);
1978
1979         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1980         if (!cap->buf) {
1981             dolog ("Could not allocate capture buffer "
1982                    "(%d samples, each %d bytes)\n",
1983                    hw->samples, 1 << hw->info.shift);
1984             goto err3;
1985         }
1986
1987         hw->clip = mixeng_clip
1988             [hw->info.nchannels == 2]
1989             [hw->info.sign]
1990             [hw->info.swap_endianness]
1991             [audio_bits_to_index (hw->info.bits)];
1992
1993         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1994         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1995
1996         hw = NULL;
1997         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1998             audio_attach_capture (hw);
1999         }
2000         return cap;
2001
2002     err3:
2003         qemu_free (cap->hw.mix_buf);
2004     err2:
2005         qemu_free (cap);
2006     err1:
2007         qemu_free (cb);
2008     err0:
2009         return NULL;
2010     }
2011 }
2012
2013 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2014 {
2015     struct capture_callback *cb;
2016
2017     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2018         if (cb->opaque == cb_opaque) {
2019             cb->ops.destroy (cb_opaque);
2020             QLIST_REMOVE (cb, entries);
2021             qemu_free (cb);
2022
2023             if (!cap->cb_head.lh_first) {
2024                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2025
2026                 while (sw) {
2027                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2028 #ifdef DEBUG_CAPTURE
2029                     dolog ("freeing %s\n", sw->name);
2030 #endif
2031
2032                     sw1 = sw->entries.le_next;
2033                     if (sw->rate) {
2034                         st_rate_stop (sw->rate);
2035                         sw->rate = NULL;
2036                     }
2037                     QLIST_REMOVE (sw, entries);
2038                     QLIST_REMOVE (sc, entries);
2039                     qemu_free (sc);
2040                     sw = sw1;
2041                 }
2042                 QLIST_REMOVE (cap, entries);
2043                 qemu_free (cap);
2044             }
2045             return;
2046         }
2047     }
2048 }
2049
2050 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2051 {
2052     if (sw) {
2053         sw->vol.mute = mute;
2054         sw->vol.l = nominal_volume.l * lvol / 255;
2055         sw->vol.r = nominal_volume.r * rvol / 255;
2056     }
2057 }
2058
2059 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2060 {
2061     if (sw) {
2062         sw->vol.mute = mute;
2063         sw->vol.l = nominal_volume.l * lvol / 255;
2064         sw->vol.r = nominal_volume.r * rvol / 255;
2065     }
2066 }