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 "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "audio.h"
  27 #include "monitor/monitor.h"
  28 #include "qemu/timer.h"
  29 #include "sysemu/sysemu.h"
  30 #include "qemu/cutils.h"
  31 #include "sysemu/replay.h"
  32
  33 #define AUDIO_CAP "audio"
  34 #include "audio_int.h"
  35
  36 /* #define DEBUG_LIVE */
  37 /* #define DEBUG_OUT */
  38 /* #define DEBUG_CAPTURE */
  39 /* #define DEBUG_POLL */
  40
  41 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  42
  43
  44 /* Order of CONFIG_AUDIO_DRIVERS is import.
  45    The 1st one is the one used by default, that is the reason
  46     that we generate the list.
  47 */
  48 static const char *audio_prio_list[] = {
  49     "spice",
  50     CONFIG_AUDIO_DRIVERS
  51     "none",
  52     "wav",
  53 };
  54
  55 static QLIST_HEAD(, audio_driver) audio_drivers;
  56
  57 void audio_driver_register(audio_driver *drv)
  58 {
  59     QLIST_INSERT_HEAD(&audio_drivers, drv, next);
  60 }
  61
  62 audio_driver *audio_driver_lookup(const char *name)
  63 {
  64     struct audio_driver *d;
  65
  66     QLIST_FOREACH(d, &audio_drivers, next) {
  67         if (strcmp(name, d->name) == 0) {
  68             return d;
  69         }
  70     }
  71
  72     audio_module_load_one(name);
  73     QLIST_FOREACH(d, &audio_drivers, next) {
  74         if (strcmp(name, d->name) == 0) {
  75             return d;
  76         }
  77     }
  78
  79     return NULL;
  80 }
  81
  82 static void audio_module_load_all(void)
  83 {
  84     int i;
  85
  86     for (i = 0; i < ARRAY_SIZE(audio_prio_list); i++) {
  87         audio_driver_lookup(audio_prio_list[i]);
  88     }
  89 }
  90
  91 struct fixed_settings {
  92     int enabled;
  93     int nb_voices;
  94     int greedy;
  95     struct audsettings settings;
  96 };
  97
  98 static struct {
  99     struct fixed_settings fixed_out;
 100     struct fixed_settings fixed_in;
 101     union {
 102         int hertz;
 103         int64_t ticks;
 104     } period;
 105     int try_poll_in;
 106     int try_poll_out;
 107 } conf = {
 108     .fixed_out = { /* DAC fixed settings */
 109         .enabled = 1,
 110         .nb_voices = 1,
 111         .greedy = 1,
 112         .settings = {
 113             .freq = 44100,
 114             .nchannels = 2,
 115             .fmt = AUD_FMT_S16,
 116             .endianness =  AUDIO_HOST_ENDIANNESS,
 117         }
 118     },
 119
 120     .fixed_in = { /* ADC fixed settings */
 121         .enabled = 1,
 122         .nb_voices = 1,
 123         .greedy = 1,
 124         .settings = {
 125             .freq = 44100,
 126             .nchannels = 2,
 127             .fmt = AUD_FMT_S16,
 128             .endianness = AUDIO_HOST_ENDIANNESS,
 129         }
 130     },
 131
 132     .period = { .hertz = 100 },
 133     .try_poll_in = 1,
 134     .try_poll_out = 1,
 135 };
 136
 137 static AudioState glob_audio_state;
 138
 139 const struct mixeng_volume nominal_volume = {
 140     .mute = 0,
 141 #ifdef FLOAT_MIXENG
 142     .r = 1.0,
 143     .l = 1.0,
 144 #else
 145     .r = 1ULL << 32,
 146     .l = 1ULL << 32,
 147 #endif
 148 };
 149
 150 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 151 #error No its not
 152 #else
 153 static void audio_print_options (const char *prefix,
 154                                  struct audio_option *opt);
 155
 156 int audio_bug (const char *funcname, int cond)
 157 {
 158     if (cond) {
 159         static int shown;
 160
 161         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 162         if (!shown) {
 163             struct audio_driver *d;
 164
 165             shown = 1;
 166             AUD_log (NULL, "Save all your work and restart without audio\n");
 167             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 168             AUD_log (NULL, "I am sorry\n");
 169             d = glob_audio_state.drv;
 170             if (d) {
 171                 audio_print_options (d->name, d->options);
 172             }
 173         }
 174         AUD_log (NULL, "Context:\n");
 175
 176 #if defined AUDIO_BREAKPOINT_ON_BUG
 177 #  if defined HOST_I386
 178 #    if defined __GNUC__
 179         __asm__ ("int3");
 180 #    elif defined _MSC_VER
 181         _asm _emit 0xcc;
 182 #    else
 183         abort ();
 184 #    endif
 185 #  else
 186         abort ();
 187 #  endif
 188 #endif
 189     }
 190
 191     return cond;
 192 }
 193 #endif
 194
 195 static inline int audio_bits_to_index (int bits)
 196 {
 197     switch (bits) {
 198     case 8:
 199         return 0;
 200
 201     case 16:
 202         return 1;
 203
 204     case 32:
 205         return 2;
 206
 207     default:
 208         audio_bug ("bits_to_index", 1);
 209         AUD_log (NULL, "invalid bits %d\n", bits);
 210         return 0;
 211     }
 212 }
 213
 214 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 215 {
 216     int cond;
 217     size_t len;
 218
 219     len = nmemb * size;
 220     cond = !nmemb || !size;
 221     cond |= nmemb < 0;
 222     cond |= len < size;
 223
 224     if (audio_bug ("audio_calloc", cond)) {
 225         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 226                  funcname);
 227         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 228         return NULL;
 229     }
 230
 231     return g_malloc0 (len);
 232 }
 233
 234 static char *audio_alloc_prefix (const char *s)
 235 {
 236     const char qemu_prefix[] = "QEMU_";
 237     size_t len, i;
 238     char *r, *u;
 239
 240     if (!s) {
 241         return NULL;
 242     }
 243
 244     len = strlen (s);
 245     r = g_malloc (len + sizeof (qemu_prefix));
 246
 247     u = r + sizeof (qemu_prefix) - 1;
 248
 249     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 250     pstrcat (r, len + sizeof (qemu_prefix), s);
 251
 252     for (i = 0; i < len; ++i) {
 253         u[i] = qemu_toupper(u[i]);
 254     }
 255
 256     return r;
 257 }
 258
 259 static const char *audio_audfmt_to_string (audfmt_e fmt)
 260 {
 261     switch (fmt) {
 262     case AUD_FMT_U8:
 263         return "U8";
 264
 265     case AUD_FMT_U16:
 266         return "U16";
 267
 268     case AUD_FMT_S8:
 269         return "S8";
 270
 271     case AUD_FMT_S16:
 272         return "S16";
 273
 274     case AUD_FMT_U32:
 275         return "U32";
 276
 277     case AUD_FMT_S32:
 278         return "S32";
 279     }
 280
 281     dolog ("Bogus audfmt %d returning S16\n", fmt);
 282     return "S16";
 283 }
 284
 285 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 286                                         int *defaultp)
 287 {
 288     if (!strcasecmp (s, "u8")) {
 289         *defaultp = 0;
 290         return AUD_FMT_U8;
 291     }
 292     else if (!strcasecmp (s, "u16")) {
 293         *defaultp = 0;
 294         return AUD_FMT_U16;
 295     }
 296     else if (!strcasecmp (s, "u32")) {
 297         *defaultp = 0;
 298         return AUD_FMT_U32;
 299     }
 300     else if (!strcasecmp (s, "s8")) {
 301         *defaultp = 0;
 302         return AUD_FMT_S8;
 303     }
 304     else if (!strcasecmp (s, "s16")) {
 305         *defaultp = 0;
 306         return AUD_FMT_S16;
 307     }
 308     else if (!strcasecmp (s, "s32")) {
 309         *defaultp = 0;
 310         return AUD_FMT_S32;
 311     }
 312     else {
 313         dolog ("Bogus audio format `%s' using %s\n",
 314                s, audio_audfmt_to_string (defval));
 315         *defaultp = 1;
 316         return defval;
 317     }
 318 }
 319
 320 static audfmt_e audio_get_conf_fmt (const char *envname,
 321                                     audfmt_e defval,
 322                                     int *defaultp)
 323 {
 324     const char *var = getenv (envname);
 325     if (!var) {
 326         *defaultp = 1;
 327         return defval;
 328     }
 329     return audio_string_to_audfmt (var, defval, defaultp);
 330 }
 331
 332 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 333 {
 334     int val;
 335     char *strval;
 336
 337     strval = getenv (key);
 338     if (strval && !qemu_strtoi(strval, NULL, 10, &val)) {
 339         *defaultp = 0;
 340         return val;
 341     }
 342     else {
 343         *defaultp = 1;
 344         return defval;
 345     }
 346 }
 347
 348 static const char *audio_get_conf_str (const char *key,
 349                                        const char *defval,
 350                                        int *defaultp)
 351 {
 352     const char *val = getenv (key);
 353     if (!val) {
 354         *defaultp = 1;
 355         return defval;
 356     }
 357     else {
 358         *defaultp = 0;
 359         return val;
 360     }
 361 }
 362
 363 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 364 {
 365     if (cap) {
 366         fprintf(stderr, "%s: ", cap);
 367     }
 368
 369     vfprintf(stderr, fmt, ap);
 370 }
 371
 372 void AUD_log (const char *cap, const char *fmt, ...)
 373 {
 374     va_list ap;
 375
 376     va_start (ap, fmt);
 377     AUD_vlog (cap, fmt, ap);
 378     va_end (ap);
 379 }
 380
 381 static void audio_print_options (const char *prefix,
 382                                  struct audio_option *opt)
 383 {
 384     char *uprefix;
 385
 386     if (!prefix) {
 387         dolog ("No prefix specified\n");
 388         return;
 389     }
 390
 391     if (!opt) {
 392         dolog ("No options\n");
 393         return;
 394     }
 395
 396     uprefix = audio_alloc_prefix (prefix);
 397
 398     for (; opt->name; opt++) {
 399         const char *state = "default";
 400         printf ("  %s_%s: ", uprefix, opt->name);
 401
 402         if (opt->overriddenp && *opt->overriddenp) {
 403             state = "current";
 404         }
 405
 406         switch (opt->tag) {
 407         case AUD_OPT_BOOL:
 408             {
 409                 int *intp = opt->valp;
 410                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 411             }
 412             break;
 413
 414         case AUD_OPT_INT:
 415             {
 416                 int *intp = opt->valp;
 417                 printf ("integer, %s = %d\n", state, *intp);
 418             }
 419             break;
 420
 421         case AUD_OPT_FMT:
 422             {
 423                 audfmt_e *fmtp = opt->valp;
 424                 printf (
 425                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 426                     state,
 427                     audio_audfmt_to_string (*fmtp)
 428                     );
 429             }
 430             break;
 431
 432         case AUD_OPT_STR:
 433             {
 434                 const char **strp = opt->valp;
 435                 printf ("string, %s = %s\n",
 436                         state,
 437                         *strp ? *strp : "(not set)");
 438             }
 439             break;
 440
 441         default:
 442             printf ("???\n");
 443             dolog ("Bad value tag for option %s_%s %d\n",
 444                    uprefix, opt->name, opt->tag);
 445             break;
 446         }
 447         printf ("    %s\n", opt->descr);
 448     }
 449
 450     g_free (uprefix);
 451 }
 452
 453 static void audio_process_options (const char *prefix,
 454                                    struct audio_option *opt)
 455 {
 456     char *optname;
 457     const char qemu_prefix[] = "QEMU_";
 458     size_t preflen, optlen;
 459
 460     if (audio_bug(__func__, !prefix)) {
 461         dolog ("prefix = NULL\n");
 462         return;
 463     }
 464
 465     if (audio_bug(__func__, !opt)) {
 466         dolog ("opt = NULL\n");
 467         return;
 468     }
 469
 470     preflen = strlen (prefix);
 471
 472     for (; opt->name; opt++) {
 473         size_t len, i;
 474         int def;
 475
 476         if (!opt->valp) {
 477             dolog ("Option value pointer for `%s' is not set\n",
 478                    opt->name);
 479             continue;
 480         }
 481
 482         len = strlen (opt->name);
 483         /* len of opt->name + len of prefix + size of qemu_prefix
 484          * (includes trailing zero) + zero + underscore (on behalf of
 485          * sizeof) */
 486         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 487         optname = g_malloc (optlen);
 488
 489         pstrcpy (optname, optlen, qemu_prefix);
 490
 491         /* copy while upper-casing, including trailing zero */
 492         for (i = 0; i <= preflen; ++i) {
 493             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 494         }
 495         pstrcat (optname, optlen, "_");
 496         pstrcat (optname, optlen, opt->name);
 497
 498         def = 1;
 499         switch (opt->tag) {
 500         case AUD_OPT_BOOL:
 501         case AUD_OPT_INT:
 502             {
 503                 int *intp = opt->valp;
 504                 *intp = audio_get_conf_int (optname, *intp, &def);
 505             }
 506             break;
 507
 508         case AUD_OPT_FMT:
 509             {
 510                 audfmt_e *fmtp = opt->valp;
 511                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 512             }
 513             break;
 514
 515         case AUD_OPT_STR:
 516             {
 517                 const char **strp = opt->valp;
 518                 *strp = audio_get_conf_str (optname, *strp, &def);
 519             }
 520             break;
 521
 522         default:
 523             dolog ("Bad value tag for option `%s' - %d\n",
 524                    optname, opt->tag);
 525             break;
 526         }
 527
 528         if (!opt->overriddenp) {
 529             opt->overriddenp = &opt->overridden;
 530         }
 531         *opt->overriddenp = !def;
 532         g_free (optname);
 533     }
 534 }
 535
 536 static void audio_print_settings (struct audsettings *as)
 537 {
 538     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 539
 540     switch (as->fmt) {
 541     case AUD_FMT_S8:
 542         AUD_log (NULL, "S8");
 543         break;
 544     case AUD_FMT_U8:
 545         AUD_log (NULL, "U8");
 546         break;
 547     case AUD_FMT_S16:
 548         AUD_log (NULL, "S16");
 549         break;
 550     case AUD_FMT_U16:
 551         AUD_log (NULL, "U16");
 552         break;
 553     case AUD_FMT_S32:
 554         AUD_log (NULL, "S32");
 555         break;
 556     case AUD_FMT_U32:
 557         AUD_log (NULL, "U32");
 558         break;
 559     default:
 560         AUD_log (NULL, "invalid(%d)", as->fmt);
 561         break;
 562     }
 563
 564     AUD_log (NULL, " endianness=");
 565     switch (as->endianness) {
 566     case 0:
 567         AUD_log (NULL, "little");
 568         break;
 569     case 1:
 570         AUD_log (NULL, "big");
 571         break;
 572     default:
 573         AUD_log (NULL, "invalid");
 574         break;
 575     }
 576     AUD_log (NULL, "\n");
 577 }
 578
 579 static int audio_validate_settings (struct audsettings *as)
 580 {
 581     int invalid;
 582
 583     invalid = as->nchannels != 1 && as->nchannels != 2;
 584     invalid |= as->endianness != 0 && as->endianness != 1;
 585
 586     switch (as->fmt) {
 587     case AUD_FMT_S8:
 588     case AUD_FMT_U8:
 589     case AUD_FMT_S16:
 590     case AUD_FMT_U16:
 591     case AUD_FMT_S32:
 592     case AUD_FMT_U32:
 593         break;
 594     default:
 595         invalid = 1;
 596         break;
 597     }
 598
 599     invalid |= as->freq <= 0;
 600     return invalid ? -1 : 0;
 601 }
 602
 603 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 604 {
 605     int bits = 8, sign = 0;
 606
 607     switch (as->fmt) {
 608     case AUD_FMT_S8:
 609         sign = 1;
 610         /* fall through */
 611     case AUD_FMT_U8:
 612         break;
 613
 614     case AUD_FMT_S16:
 615         sign = 1;
 616         /* fall through */
 617     case AUD_FMT_U16:
 618         bits = 16;
 619         break;
 620
 621     case AUD_FMT_S32:
 622         sign = 1;
 623         /* fall through */
 624     case AUD_FMT_U32:
 625         bits = 32;
 626         break;
 627     }
 628     return info->freq == as->freq
 629         && info->nchannels == as->nchannels
 630         && info->sign == sign
 631         && info->bits == bits
 632         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 633 }
 634
 635 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 636 {
 637     int bits = 8, sign = 0, shift = 0;
 638
 639     switch (as->fmt) {
 640     case AUD_FMT_S8:
 641         sign = 1;
 642     case AUD_FMT_U8:
 643         break;
 644
 645     case AUD_FMT_S16:
 646         sign = 1;
 647     case AUD_FMT_U16:
 648         bits = 16;
 649         shift = 1;
 650         break;
 651
 652     case AUD_FMT_S32:
 653         sign = 1;
 654     case AUD_FMT_U32:
 655         bits = 32;
 656         shift = 2;
 657         break;
 658     }
 659
 660     info->freq = as->freq;
 661     info->bits = bits;
 662     info->sign = sign;
 663     info->nchannels = as->nchannels;
 664     info->shift = (as->nchannels == 2) + shift;
 665     info->align = (1 << info->shift) - 1;
 666     info->bytes_per_second = info->freq << info->shift;
 667     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 668 }
 669
 670 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 671 {
 672     if (!len) {
 673         return;
 674     }
 675
 676     if (info->sign) {
 677         memset (buf, 0x00, len << info->shift);
 678     }
 679     else {
 680         switch (info->bits) {
 681         case 8:
 682             memset (buf, 0x80, len << info->shift);
 683             break;
 684
 685         case 16:
 686             {
 687                 int i;
 688                 uint16_t *p = buf;
 689                 int shift = info->nchannels - 1;
 690                 short s = INT16_MAX;
 691
 692                 if (info->swap_endianness) {
 693                     s = bswap16 (s);
 694                 }
 695
 696                 for (i = 0; i < len << shift; i++) {
 697                     p[i] = s;
 698                 }
 699             }
 700             break;
 701
 702         case 32:
 703             {
 704                 int i;
 705                 uint32_t *p = buf;
 706                 int shift = info->nchannels - 1;
 707                 int32_t s = INT32_MAX;
 708
 709                 if (info->swap_endianness) {
 710                     s = bswap32 (s);
 711                 }
 712
 713                 for (i = 0; i < len << shift; i++) {
 714                     p[i] = s;
 715                 }
 716             }
 717             break;
 718
 719         default:
 720             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 721                      info->bits);
 722             break;
 723         }
 724     }
 725 }
 726
 727 /*
 728  * Capture
 729  */
 730 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 731 {
 732     (void) src;
 733     (void) dst;
 734     (void) samples;
 735 }
 736
 737 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 738     struct audsettings *as
 739     )
 740 {
 741     CaptureVoiceOut *cap;
 742     AudioState *s = &glob_audio_state;
 743
 744     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 745         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 746             return cap;
 747         }
 748     }
 749     return NULL;
 750 }
 751
 752 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 753 {
 754     struct capture_callback *cb;
 755
 756 #ifdef DEBUG_CAPTURE
 757     dolog ("notification %d sent\n", cmd);
 758 #endif
 759     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 760         cb->ops.notify (cb->opaque, cmd);
 761     }
 762 }
 763
 764 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 765 {
 766     if (cap->hw.enabled != enabled) {
 767         audcnotification_e cmd;
 768         cap->hw.enabled = enabled;
 769         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 770         audio_notify_capture (cap, cmd);
 771     }
 772 }
 773
 774 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 775 {
 776     HWVoiceOut *hw = &cap->hw;
 777     SWVoiceOut *sw;
 778     int enabled = 0;
 779
 780     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 781         if (sw->active) {
 782             enabled = 1;
 783             break;
 784         }
 785     }
 786     audio_capture_maybe_changed (cap, enabled);
 787 }
 788
 789 static void audio_detach_capture (HWVoiceOut *hw)
 790 {
 791     SWVoiceCap *sc = hw->cap_head.lh_first;
 792
 793     while (sc) {
 794         SWVoiceCap *sc1 = sc->entries.le_next;
 795         SWVoiceOut *sw = &sc->sw;
 796         CaptureVoiceOut *cap = sc->cap;
 797         int was_active = sw->active;
 798
 799         if (sw->rate) {
 800             st_rate_stop (sw->rate);
 801             sw->rate = NULL;
 802         }
 803
 804         QLIST_REMOVE (sw, entries);
 805         QLIST_REMOVE (sc, entries);
 806         g_free (sc);
 807         if (was_active) {
 808             /* We have removed soft voice from the capture:
 809                this might have changed the overall status of the capture
 810                since this might have been the only active voice */
 811             audio_recalc_and_notify_capture (cap);
 812         }
 813         sc = sc1;
 814     }
 815 }
 816
 817 static int audio_attach_capture (HWVoiceOut *hw)
 818 {
 819     AudioState *s = &glob_audio_state;
 820     CaptureVoiceOut *cap;
 821
 822     audio_detach_capture (hw);
 823     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 824         SWVoiceCap *sc;
 825         SWVoiceOut *sw;
 826         HWVoiceOut *hw_cap = &cap->hw;
 827
 828         sc = audio_calloc(__func__, 1, sizeof(*sc));
 829         if (!sc) {
 830             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 831                    sizeof (*sc));
 832             return -1;
 833         }
 834
 835         sc->cap = cap;
 836         sw = &sc->sw;
 837         sw->hw = hw_cap;
 838         sw->info = hw->info;
 839         sw->empty = 1;
 840         sw->active = hw->enabled;
 841         sw->conv = noop_conv;
 842         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 843         sw->vol = nominal_volume;
 844         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 845         if (!sw->rate) {
 846             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 847             g_free (sw);
 848             return -1;
 849         }
 850         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 851         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 852 #ifdef DEBUG_CAPTURE
 853         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 854                                     hw, sw->info.freq, sw->info.bits,
 855                                     sw->info.nchannels);
 856         dolog ("Added %s active = %d\n", sw->name, sw->active);
 857 #endif
 858         if (sw->active) {
 859             audio_capture_maybe_changed (cap, 1);
 860         }
 861     }
 862     return 0;
 863 }
 864
 865 /*
 866  * Hard voice (capture)
 867  */
 868 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 869 {
 870     SWVoiceIn *sw;
 871     int m = hw->total_samples_captured;
 872
 873     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 874         if (sw->active) {
 875             m = audio_MIN (m, sw->total_hw_samples_acquired);
 876         }
 877     }
 878     return m;
 879 }
 880
 881 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 882 {
 883     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 884     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 885         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 886         return 0;
 887     }
 888     return live;
 889 }
 890
 891 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 892                            int live, int pending)
 893 {
 894     int left = hw->samples - pending;
 895     int len = audio_MIN (left, live);
 896     int clipped = 0;
 897
 898     while (len) {
 899         struct st_sample *src = hw->mix_buf + hw->rpos;
 900         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 901         int samples_till_end_of_buf = hw->samples - hw->rpos;
 902         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 903
 904         hw->clip (dst, src, samples_to_clip);
 905
 906         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 907         len -= samples_to_clip;
 908         clipped += samples_to_clip;
 909     }
 910     return clipped;
 911 }
 912
 913 /*
 914  * Soft voice (capture)
 915  */
 916 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 917 {
 918     HWVoiceIn *hw = sw->hw;
 919     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 920     int rpos;
 921
 922     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 923         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 924         return 0;
 925     }
 926
 927     rpos = hw->wpos - live;
 928     if (rpos >= 0) {
 929         return rpos;
 930     }
 931     else {
 932         return hw->samples + rpos;
 933     }
 934 }
 935
 936 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 937 {
 938     HWVoiceIn *hw = sw->hw;
 939     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 940     struct st_sample *src, *dst = sw->buf;
 941
 942     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 943
 944     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 945     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 946         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 947         return 0;
 948     }
 949
 950     samples = size >> sw->info.shift;
 951     if (!live) {
 952         return 0;
 953     }
 954
 955     swlim = (live * sw->ratio) >> 32;
 956     swlim = audio_MIN (swlim, samples);
 957
 958     while (swlim) {
 959         src = hw->conv_buf + rpos;
 960         isamp = hw->wpos - rpos;
 961         /* XXX: <= ? */
 962         if (isamp <= 0) {
 963             isamp = hw->samples - rpos;
 964         }
 965
 966         if (!isamp) {
 967             break;
 968         }
 969         osamp = swlim;
 970
 971         if (audio_bug(__func__, osamp < 0)) {
 972             dolog ("osamp=%d\n", osamp);
 973             return 0;
 974         }
 975
 976         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 977         swlim -= osamp;
 978         rpos = (rpos + isamp) % hw->samples;
 979         dst += osamp;
 980         ret += osamp;
 981         total += isamp;
 982     }
 983
 984     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 985         mixeng_volume (sw->buf, ret, &sw->vol);
 986     }
 987
 988     sw->clip (buf, sw->buf, ret);
 989     sw->total_hw_samples_acquired += total;
 990     return ret << sw->info.shift;
 991 }
 992
 993 /*
 994  * Hard voice (playback)
 995  */
 996 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 997 {
 998     SWVoiceOut *sw;
 999     int m = INT_MAX;
1000     int nb_live = 0;
1001
1002     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1003         if (sw->active || !sw->empty) {
1004             m = audio_MIN (m, sw->total_hw_samples_mixed);
1005             nb_live += 1;
1006         }
1007     }
1008
1009     *nb_livep = nb_live;
1010     return m;
1011 }
1012
1013 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
1014 {
1015     int smin;
1016     int nb_live1;
1017
1018     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
1019     if (nb_live) {
1020         *nb_live = nb_live1;
1021     }
1022
1023     if (nb_live1) {
1024         int live = smin;
1025
1026         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1027             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1028             return 0;
1029         }
1030         return live;
1031     }
1032     return 0;
1033 }
1034
1035 /*
1036  * Soft voice (playback)
1037  */
1038 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1039 {
1040     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1041     int ret = 0, pos = 0, total = 0;
1042
1043     if (!sw) {
1044         return size;
1045     }
1046
1047     hwsamples = sw->hw->samples;
1048
1049     live = sw->total_hw_samples_mixed;
1050     if (audio_bug(__func__, live < 0 || live > hwsamples)) {
1051         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1052         return 0;
1053     }
1054
1055     if (live == hwsamples) {
1056 #ifdef DEBUG_OUT
1057         dolog ("%s is full %d\n", sw->name, live);
1058 #endif
1059         return 0;
1060     }
1061
1062     wpos = (sw->hw->rpos + live) % hwsamples;
1063     samples = size >> sw->info.shift;
1064
1065     dead = hwsamples - live;
1066     swlim = ((int64_t) dead << 32) / sw->ratio;
1067     swlim = audio_MIN (swlim, samples);
1068     if (swlim) {
1069         sw->conv (sw->buf, buf, swlim);
1070
1071         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1072             mixeng_volume (sw->buf, swlim, &sw->vol);
1073         }
1074     }
1075
1076     while (swlim) {
1077         dead = hwsamples - live;
1078         left = hwsamples - wpos;
1079         blck = audio_MIN (dead, left);
1080         if (!blck) {
1081             break;
1082         }
1083         isamp = swlim;
1084         osamp = blck;
1085         st_rate_flow_mix (
1086             sw->rate,
1087             sw->buf + pos,
1088             sw->hw->mix_buf + wpos,
1089             &isamp,
1090             &osamp
1091             );
1092         ret += isamp;
1093         swlim -= isamp;
1094         pos += isamp;
1095         live += osamp;
1096         wpos = (wpos + osamp) % hwsamples;
1097         total += osamp;
1098     }
1099
1100     sw->total_hw_samples_mixed += total;
1101     sw->empty = sw->total_hw_samples_mixed == 0;
1102
1103 #ifdef DEBUG_OUT
1104     dolog (
1105         "%s: write size %d ret %d total sw %d\n",
1106         SW_NAME (sw),
1107         size >> sw->info.shift,
1108         ret,
1109         sw->total_hw_samples_mixed
1110         );
1111 #endif
1112
1113     return ret << sw->info.shift;
1114 }
1115
1116 #ifdef DEBUG_AUDIO
1117 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1118 {
1119     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1120            cap, info->bits, info->sign, info->freq, info->nchannels);
1121 }
1122 #endif
1123
1124 #define DAC
1125 #include "audio_template.h"
1126 #undef DAC
1127 #include "audio_template.h"
1128
1129 /*
1130  * Timer
1131  */
1132 static int audio_is_timer_needed (void)
1133 {
1134     HWVoiceIn *hwi = NULL;
1135     HWVoiceOut *hwo = NULL;
1136
1137     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1138         if (!hwo->poll_mode) return 1;
1139     }
1140     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1141         if (!hwi->poll_mode) return 1;
1142     }
1143     return 0;
1144 }
1145
1146 static void audio_reset_timer (AudioState *s)
1147 {
1148     if (audio_is_timer_needed ()) {
1149         timer_mod_anticipate_ns(s->ts,
1150             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
1151     }
1152     else {
1153         timer_del (s->ts);
1154     }
1155 }
1156
1157 static void audio_timer (void *opaque)
1158 {
1159     audio_run ("timer");
1160     audio_reset_timer (opaque);
1161 }
1162
1163 /*
1164  * Public API
1165  */
1166 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1167 {
1168     if (!sw) {
1169         /* XXX: Consider options */
1170         return size;
1171     }
1172
1173     if (!sw->hw->enabled) {
1174         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1175         return 0;
1176     }
1177
1178     return sw->hw->pcm_ops->write(sw, buf, size);
1179 }
1180
1181 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1182 {
1183     if (!sw) {
1184         /* XXX: Consider options */
1185         return size;
1186     }
1187
1188     if (!sw->hw->enabled) {
1189         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1190         return 0;
1191     }
1192
1193     return sw->hw->pcm_ops->read(sw, buf, size);
1194 }
1195
1196 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1197 {
1198     return sw->hw->samples << sw->hw->info.shift;
1199 }
1200
1201 void AUD_set_active_out (SWVoiceOut *sw, int on)
1202 {
1203     HWVoiceOut *hw;
1204
1205     if (!sw) {
1206         return;
1207     }
1208
1209     hw = sw->hw;
1210     if (sw->active != on) {
1211         AudioState *s = &glob_audio_state;
1212         SWVoiceOut *temp_sw;
1213         SWVoiceCap *sc;
1214
1215         if (on) {
1216             hw->pending_disable = 0;
1217             if (!hw->enabled) {
1218                 hw->enabled = 1;
1219                 if (s->vm_running) {
1220                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1221                     audio_reset_timer (s);
1222                 }
1223             }
1224         }
1225         else {
1226             if (hw->enabled) {
1227                 int nb_active = 0;
1228
1229                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1230                      temp_sw = temp_sw->entries.le_next) {
1231                     nb_active += temp_sw->active != 0;
1232                 }
1233
1234                 hw->pending_disable = nb_active == 1;
1235             }
1236         }
1237
1238         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1239             sc->sw.active = hw->enabled;
1240             if (hw->enabled) {
1241                 audio_capture_maybe_changed (sc->cap, 1);
1242             }
1243         }
1244         sw->active = on;
1245     }
1246 }
1247
1248 void AUD_set_active_in (SWVoiceIn *sw, int on)
1249 {
1250     HWVoiceIn *hw;
1251
1252     if (!sw) {
1253         return;
1254     }
1255
1256     hw = sw->hw;
1257     if (sw->active != on) {
1258         AudioState *s = &glob_audio_state;
1259         SWVoiceIn *temp_sw;
1260
1261         if (on) {
1262             if (!hw->enabled) {
1263                 hw->enabled = 1;
1264                 if (s->vm_running) {
1265                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1266                     audio_reset_timer (s);
1267                 }
1268             }
1269             sw->total_hw_samples_acquired = hw->total_samples_captured;
1270         }
1271         else {
1272             if (hw->enabled) {
1273                 int nb_active = 0;
1274
1275                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1276                      temp_sw = temp_sw->entries.le_next) {
1277                     nb_active += temp_sw->active != 0;
1278                 }
1279
1280                 if (nb_active == 1) {
1281                     hw->enabled = 0;
1282                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1283                 }
1284             }
1285         }
1286         sw->active = on;
1287     }
1288 }
1289
1290 static int audio_get_avail (SWVoiceIn *sw)
1291 {
1292     int live;
1293
1294     if (!sw) {
1295         return 0;
1296     }
1297
1298     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1299     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1300         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1301         return 0;
1302     }
1303
1304     ldebug (
1305         "%s: get_avail live %d ret %" PRId64 "\n",
1306         SW_NAME (sw),
1307         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1308         );
1309
1310     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1311 }
1312
1313 static int audio_get_free (SWVoiceOut *sw)
1314 {
1315     int live, dead;
1316
1317     if (!sw) {
1318         return 0;
1319     }
1320
1321     live = sw->total_hw_samples_mixed;
1322
1323     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1324         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1325         return 0;
1326     }
1327
1328     dead = sw->hw->samples - live;
1329
1330 #ifdef DEBUG_OUT
1331     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1332            SW_NAME (sw),
1333            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1334 #endif
1335
1336     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1337 }
1338
1339 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1340 {
1341     int n;
1342
1343     if (hw->enabled) {
1344         SWVoiceCap *sc;
1345
1346         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1347             SWVoiceOut *sw = &sc->sw;
1348             int rpos2 = rpos;
1349
1350             n = samples;
1351             while (n) {
1352                 int till_end_of_hw = hw->samples - rpos2;
1353                 int to_write = audio_MIN (till_end_of_hw, n);
1354                 int bytes = to_write << hw->info.shift;
1355                 int written;
1356
1357                 sw->buf = hw->mix_buf + rpos2;
1358                 written = audio_pcm_sw_write (sw, NULL, bytes);
1359                 if (written - bytes) {
1360                     dolog ("Could not mix %d bytes into a capture "
1361                            "buffer, mixed %d\n",
1362                            bytes, written);
1363                     break;
1364                 }
1365                 n -= to_write;
1366                 rpos2 = (rpos2 + to_write) % hw->samples;
1367             }
1368         }
1369     }
1370
1371     n = audio_MIN (samples, hw->samples - rpos);
1372     mixeng_clear (hw->mix_buf + rpos, n);
1373     mixeng_clear (hw->mix_buf, samples - n);
1374 }
1375
1376 static void audio_run_out (AudioState *s)
1377 {
1378     HWVoiceOut *hw = NULL;
1379     SWVoiceOut *sw;
1380
1381     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1382         int played;
1383         int live, free, nb_live, cleanup_required, prev_rpos;
1384
1385         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1386         if (!nb_live) {
1387             live = 0;
1388         }
1389
1390         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1391             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1392             continue;
1393         }
1394
1395         if (hw->pending_disable && !nb_live) {
1396             SWVoiceCap *sc;
1397 #ifdef DEBUG_OUT
1398             dolog ("Disabling voice\n");
1399 #endif
1400             hw->enabled = 0;
1401             hw->pending_disable = 0;
1402             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1403             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1404                 sc->sw.active = 0;
1405                 audio_recalc_and_notify_capture (sc->cap);
1406             }
1407             continue;
1408         }
1409
1410         if (!live) {
1411             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1412                 if (sw->active) {
1413                     free = audio_get_free (sw);
1414                     if (free > 0) {
1415                         sw->callback.fn (sw->callback.opaque, free);
1416                     }
1417                 }
1418             }
1419             continue;
1420         }
1421
1422         prev_rpos = hw->rpos;
1423         played = hw->pcm_ops->run_out (hw, live);
1424         replay_audio_out(&played);
1425         if (audio_bug(__func__, hw->rpos >= hw->samples)) {
1426             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1427                    hw->rpos, hw->samples, played);
1428             hw->rpos = 0;
1429         }
1430
1431 #ifdef DEBUG_OUT
1432         dolog ("played=%d\n", played);
1433 #endif
1434
1435         if (played) {
1436             hw->ts_helper += played;
1437             audio_capture_mix_and_clear (hw, prev_rpos, played);
1438         }
1439
1440         cleanup_required = 0;
1441         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1442             if (!sw->active && sw->empty) {
1443                 continue;
1444             }
1445
1446             if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1447                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1448                        played, sw->total_hw_samples_mixed);
1449                 played = sw->total_hw_samples_mixed;
1450             }
1451
1452             sw->total_hw_samples_mixed -= played;
1453
1454             if (!sw->total_hw_samples_mixed) {
1455                 sw->empty = 1;
1456                 cleanup_required |= !sw->active && !sw->callback.fn;
1457             }
1458
1459             if (sw->active) {
1460                 free = audio_get_free (sw);
1461                 if (free > 0) {
1462                     sw->callback.fn (sw->callback.opaque, free);
1463                 }
1464             }
1465         }
1466
1467         if (cleanup_required) {
1468             SWVoiceOut *sw1;
1469
1470             sw = hw->sw_head.lh_first;
1471             while (sw) {
1472                 sw1 = sw->entries.le_next;
1473                 if (!sw->active && !sw->callback.fn) {
1474                     audio_close_out (sw);
1475                 }
1476                 sw = sw1;
1477             }
1478         }
1479     }
1480 }
1481
1482 static void audio_run_in (AudioState *s)
1483 {
1484     HWVoiceIn *hw = NULL;
1485
1486     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1487         SWVoiceIn *sw;
1488         int captured = 0, min;
1489
1490         if (replay_mode != REPLAY_MODE_PLAY) {
1491             captured = hw->pcm_ops->run_in(hw);
1492         }
1493         replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
1494
1495         min = audio_pcm_hw_find_min_in (hw);
1496         hw->total_samples_captured += captured - min;
1497         hw->ts_helper += captured;
1498
1499         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1500             sw->total_hw_samples_acquired -= min;
1501
1502             if (sw->active) {
1503                 int avail;
1504
1505                 avail = audio_get_avail (sw);
1506                 if (avail > 0) {
1507                     sw->callback.fn (sw->callback.opaque, avail);
1508                 }
1509             }
1510         }
1511     }
1512 }
1513
1514 static void audio_run_capture (AudioState *s)
1515 {
1516     CaptureVoiceOut *cap;
1517
1518     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1519         int live, rpos, captured;
1520         HWVoiceOut *hw = &cap->hw;
1521         SWVoiceOut *sw;
1522
1523         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1524         rpos = hw->rpos;
1525         while (live) {
1526             int left = hw->samples - rpos;
1527             int to_capture = audio_MIN (live, left);
1528             struct st_sample *src;
1529             struct capture_callback *cb;
1530
1531             src = hw->mix_buf + rpos;
1532             hw->clip (cap->buf, src, to_capture);
1533             mixeng_clear (src, to_capture);
1534
1535             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1536                 cb->ops.capture (cb->opaque, cap->buf,
1537                                  to_capture << hw->info.shift);
1538             }
1539             rpos = (rpos + to_capture) % hw->samples;
1540             live -= to_capture;
1541         }
1542         hw->rpos = rpos;
1543
1544         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1545             if (!sw->active && sw->empty) {
1546                 continue;
1547             }
1548
1549             if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1550                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1551                        captured, sw->total_hw_samples_mixed);
1552                 captured = sw->total_hw_samples_mixed;
1553             }
1554
1555             sw->total_hw_samples_mixed -= captured;
1556             sw->empty = sw->total_hw_samples_mixed == 0;
1557         }
1558     }
1559 }
1560
1561 void audio_run (const char *msg)
1562 {
1563     AudioState *s = &glob_audio_state;
1564
1565     audio_run_out (s);
1566     audio_run_in (s);
1567     audio_run_capture (s);
1568 #ifdef DEBUG_POLL
1569     {
1570         static double prevtime;
1571         double currtime;
1572         struct timeval tv;
1573
1574         if (gettimeofday (&tv, NULL)) {
1575             perror ("audio_run: gettimeofday");
1576             return;
1577         }
1578
1579         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1580         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1581         prevtime = currtime;
1582     }
1583 #endif
1584 }
1585
1586 static struct audio_option audio_options[] = {
1587     /* DAC */
1588     {
1589         .name  = "DAC_FIXED_SETTINGS",
1590         .tag   = AUD_OPT_BOOL,
1591         .valp  = &conf.fixed_out.enabled,
1592         .descr = "Use fixed settings for host DAC"
1593     },
1594     {
1595         .name  = "DAC_FIXED_FREQ",
1596         .tag   = AUD_OPT_INT,
1597         .valp  = &conf.fixed_out.settings.freq,
1598         .descr = "Frequency for fixed host DAC"
1599     },
1600     {
1601         .name  = "DAC_FIXED_FMT",
1602         .tag   = AUD_OPT_FMT,
1603         .valp  = &conf.fixed_out.settings.fmt,
1604         .descr = "Format for fixed host DAC"
1605     },
1606     {
1607         .name  = "DAC_FIXED_CHANNELS",
1608         .tag   = AUD_OPT_INT,
1609         .valp  = &conf.fixed_out.settings.nchannels,
1610         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1611     },
1612     {
1613         .name  = "DAC_VOICES",
1614         .tag   = AUD_OPT_INT,
1615         .valp  = &conf.fixed_out.nb_voices,
1616         .descr = "Number of voices for DAC"
1617     },
1618     {
1619         .name  = "DAC_TRY_POLL",
1620         .tag   = AUD_OPT_BOOL,
1621         .valp  = &conf.try_poll_out,
1622         .descr = "Attempt using poll mode for DAC"
1623     },
1624     /* ADC */
1625     {
1626         .name  = "ADC_FIXED_SETTINGS",
1627         .tag   = AUD_OPT_BOOL,
1628         .valp  = &conf.fixed_in.enabled,
1629         .descr = "Use fixed settings for host ADC"
1630     },
1631     {
1632         .name  = "ADC_FIXED_FREQ",
1633         .tag   = AUD_OPT_INT,
1634         .valp  = &conf.fixed_in.settings.freq,
1635         .descr = "Frequency for fixed host ADC"
1636     },
1637     {
1638         .name  = "ADC_FIXED_FMT",
1639         .tag   = AUD_OPT_FMT,
1640         .valp  = &conf.fixed_in.settings.fmt,
1641         .descr = "Format for fixed host ADC"
1642     },
1643     {
1644         .name  = "ADC_FIXED_CHANNELS",
1645         .tag   = AUD_OPT_INT,
1646         .valp  = &conf.fixed_in.settings.nchannels,
1647         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1648     },
1649     {
1650         .name  = "ADC_VOICES",
1651         .tag   = AUD_OPT_INT,
1652         .valp  = &conf.fixed_in.nb_voices,
1653         .descr = "Number of voices for ADC"
1654     },
1655     {
1656         .name  = "ADC_TRY_POLL",
1657         .tag   = AUD_OPT_BOOL,
1658         .valp  = &conf.try_poll_in,
1659         .descr = "Attempt using poll mode for ADC"
1660     },
1661     /* Misc */
1662     {
1663         .name  = "TIMER_PERIOD",
1664         .tag   = AUD_OPT_INT,
1665         .valp  = &conf.period.hertz,
1666         .descr = "Timer period in HZ (0 - use lowest possible)"
1667     },
1668     { /* End of list */ }
1669 };
1670
1671 static void audio_pp_nb_voices (const char *typ, int nb)
1672 {
1673     switch (nb) {
1674     case 0:
1675         printf ("Does not support %s\n", typ);
1676         break;
1677     case 1:
1678         printf ("One %s voice\n", typ);
1679         break;
1680     case INT_MAX:
1681         printf ("Theoretically supports many %s voices\n", typ);
1682         break;
1683     default:
1684         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1685         break;
1686     }
1687
1688 }
1689
1690 void AUD_help (void)
1691 {
1692     struct audio_driver *d;
1693
1694     /* make sure we print the help text for modular drivers too */
1695     audio_module_load_all();
1696
1697     audio_process_options ("AUDIO", audio_options);
1698     QLIST_FOREACH(d, &audio_drivers, next) {
1699         if (d->options) {
1700             audio_process_options (d->name, d->options);
1701         }
1702     }
1703
1704     printf ("Audio options:\n");
1705     audio_print_options ("AUDIO", audio_options);
1706     printf ("\n");
1707
1708     printf ("Available drivers:\n");
1709
1710     QLIST_FOREACH(d, &audio_drivers, next) {
1711
1712         printf ("Name: %s\n", d->name);
1713         printf ("Description: %s\n", d->descr);
1714
1715         audio_pp_nb_voices ("playback", d->max_voices_out);
1716         audio_pp_nb_voices ("capture", d->max_voices_in);
1717
1718         if (d->options) {
1719             printf ("Options:\n");
1720             audio_print_options (d->name, d->options);
1721         }
1722         else {
1723             printf ("No options\n");
1724         }
1725         printf ("\n");
1726     }
1727
1728     printf (
1729         "Options are settable through environment variables.\n"
1730         "Example:\n"
1731 #ifdef _WIN32
1732         "  set QEMU_AUDIO_DRV=wav\n"
1733         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1734 #else
1735         "  export QEMU_AUDIO_DRV=wav\n"
1736         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1737         "(for csh replace export with setenv in the above)\n"
1738 #endif
1739         "  qemu ...\n\n"
1740         );
1741 }
1742
1743 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1744 {
1745     if (drv->options) {
1746         audio_process_options (drv->name, drv->options);
1747     }
1748     s->drv_opaque = drv->init ();
1749
1750     if (s->drv_opaque) {
1751         audio_init_nb_voices_out (drv);
1752         audio_init_nb_voices_in (drv);
1753         s->drv = drv;
1754         return 0;
1755     }
1756     else {
1757         dolog ("Could not init `%s' audio driver\n", drv->name);
1758         return -1;
1759     }
1760 }
1761
1762 static void audio_vm_change_state_handler (void *opaque, int running,
1763                                            RunState state)
1764 {
1765     AudioState *s = opaque;
1766     HWVoiceOut *hwo = NULL;
1767     HWVoiceIn *hwi = NULL;
1768     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1769
1770     s->vm_running = running;
1771     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1772         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1773     }
1774
1775     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1776         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1777     }
1778     audio_reset_timer (s);
1779 }
1780
1781 static bool is_cleaning_up;
1782
1783 bool audio_is_cleaning_up(void)
1784 {
1785     return is_cleaning_up;
1786 }
1787
1788 void audio_cleanup(void)
1789 {
1790     AudioState *s = &glob_audio_state;
1791     HWVoiceOut *hwo, *hwon;
1792     HWVoiceIn *hwi, *hwin;
1793
1794     is_cleaning_up = true;
1795     QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1796         SWVoiceCap *sc;
1797
1798         if (hwo->enabled) {
1799             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1800         }
1801         hwo->pcm_ops->fini_out (hwo);
1802
1803         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1804             CaptureVoiceOut *cap = sc->cap;
1805             struct capture_callback *cb;
1806
1807             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1808                 cb->ops.destroy (cb->opaque);
1809             }
1810         }
1811         QLIST_REMOVE(hwo, entries);
1812     }
1813
1814     QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1815         if (hwi->enabled) {
1816             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1817         }
1818         hwi->pcm_ops->fini_in (hwi);
1819         QLIST_REMOVE(hwi, entries);
1820     }
1821
1822     if (s->drv) {
1823         s->drv->fini (s->drv_opaque);
1824         s->drv = NULL;
1825     }
1826 }
1827
1828 static const VMStateDescription vmstate_audio = {
1829     .name = "audio",
1830     .version_id = 1,
1831     .minimum_version_id = 1,
1832     .fields = (VMStateField[]) {
1833         VMSTATE_END_OF_LIST()
1834     }
1835 };
1836
1837 static void audio_init (void)
1838 {
1839     size_t i;
1840     int done = 0;
1841     const char *drvname;
1842     VMChangeStateEntry *e;
1843     AudioState *s = &glob_audio_state;
1844     struct audio_driver *driver;
1845
1846     if (s->drv) {
1847         return;
1848     }
1849
1850     QLIST_INIT (&s->hw_head_out);
1851     QLIST_INIT (&s->hw_head_in);
1852     QLIST_INIT (&s->cap_head);
1853     atexit(audio_cleanup);
1854
1855     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1856
1857     audio_process_options ("AUDIO", audio_options);
1858
1859     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1860     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1861
1862     if (s->nb_hw_voices_out <= 0) {
1863         dolog ("Bogus number of playback voices %d, setting to 1\n",
1864                s->nb_hw_voices_out);
1865         s->nb_hw_voices_out = 1;
1866     }
1867
1868     if (s->nb_hw_voices_in <= 0) {
1869         dolog ("Bogus number of capture voices %d, setting to 0\n",
1870                s->nb_hw_voices_in);
1871         s->nb_hw_voices_in = 0;
1872     }
1873
1874     {
1875         int def;
1876         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1877     }
1878
1879     if (drvname) {
1880         driver = audio_driver_lookup(drvname);
1881         if (driver) {
1882             done = !audio_driver_init(s, driver);
1883         } else {
1884             dolog ("Unknown audio driver `%s'\n", drvname);
1885             dolog ("Run with -audio-help to list available drivers\n");
1886         }
1887     }
1888
1889     if (!done) {
1890         for (i = 0; !done && i < ARRAY_SIZE(audio_prio_list); i++) {
1891             driver = audio_driver_lookup(audio_prio_list[i]);
1892             if (driver && driver->can_be_default) {
1893                 done = !audio_driver_init(s, driver);
1894             }
1895         }
1896     }
1897
1898     if (!done) {
1899         driver = audio_driver_lookup("none");
1900         done = !audio_driver_init(s, driver);
1901         assert(done);
1902         dolog("warning: Using timer based audio emulation\n");
1903     }
1904
1905     if (conf.period.hertz <= 0) {
1906         if (conf.period.hertz < 0) {
1907             dolog ("warning: Timer period is negative - %d "
1908                    "treating as zero\n",
1909                    conf.period.hertz);
1910         }
1911         conf.period.ticks = 1;
1912     } else {
1913         conf.period.ticks = NANOSECONDS_PER_SECOND / conf.period.hertz;
1914     }
1915
1916     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1917     if (!e) {
1918         dolog ("warning: Could not register change state handler\n"
1919                "(Audio can continue looping even after stopping the VM)\n");
1920     }
1921
1922     QLIST_INIT (&s->card_head);
1923     vmstate_register (NULL, 0, &vmstate_audio, s);
1924 }
1925
1926 void AUD_register_card (const char *name, QEMUSoundCard *card)
1927 {
1928     audio_init ();
1929     card->name = g_strdup (name);
1930     memset (&card->entries, 0, sizeof (card->entries));
1931     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1932 }
1933
1934 void AUD_remove_card (QEMUSoundCard *card)
1935 {
1936     QLIST_REMOVE (card, entries);
1937     g_free (card->name);
1938 }
1939
1940
1941 CaptureVoiceOut *AUD_add_capture (
1942     struct audsettings *as,
1943     struct audio_capture_ops *ops,
1944     void *cb_opaque
1945     )
1946 {
1947     AudioState *s = &glob_audio_state;
1948     CaptureVoiceOut *cap;
1949     struct capture_callback *cb;
1950
1951     if (audio_validate_settings (as)) {
1952         dolog ("Invalid settings were passed when trying to add capture\n");
1953         audio_print_settings (as);
1954         goto err0;
1955     }
1956
1957     cb = audio_calloc(__func__, 1, sizeof(*cb));
1958     if (!cb) {
1959         dolog ("Could not allocate capture callback information, size %zu\n",
1960                sizeof (*cb));
1961         goto err0;
1962     }
1963     cb->ops = *ops;
1964     cb->opaque = cb_opaque;
1965
1966     cap = audio_pcm_capture_find_specific (as);
1967     if (cap) {
1968         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1969         return cap;
1970     }
1971     else {
1972         HWVoiceOut *hw;
1973         CaptureVoiceOut *cap;
1974
1975         cap = audio_calloc(__func__, 1, sizeof(*cap));
1976         if (!cap) {
1977             dolog ("Could not allocate capture voice, size %zu\n",
1978                    sizeof (*cap));
1979             goto err1;
1980         }
1981
1982         hw = &cap->hw;
1983         QLIST_INIT (&hw->sw_head);
1984         QLIST_INIT (&cap->cb_head);
1985
1986         /* XXX find a more elegant way */
1987         hw->samples = 4096 * 4;
1988         hw->mix_buf = audio_calloc(__func__, hw->samples,
1989                                    sizeof(struct st_sample));
1990         if (!hw->mix_buf) {
1991             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1992                    hw->samples);
1993             goto err2;
1994         }
1995
1996         audio_pcm_init_info (&hw->info, as);
1997
1998         cap->buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
1999         if (!cap->buf) {
2000             dolog ("Could not allocate capture buffer "
2001                    "(%d samples, each %d bytes)\n",
2002                    hw->samples, 1 << hw->info.shift);
2003             goto err3;
2004         }
2005
2006         hw->clip = mixeng_clip
2007             [hw->info.nchannels == 2]
2008             [hw->info.sign]
2009             [hw->info.swap_endianness]
2010             [audio_bits_to_index (hw->info.bits)];
2011
2012         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2013         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2014
2015         QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
2016             audio_attach_capture (hw);
2017         }
2018         return cap;
2019
2020     err3:
2021         g_free (cap->hw.mix_buf);
2022     err2:
2023         g_free (cap);
2024     err1:
2025         g_free (cb);
2026     err0:
2027         return NULL;
2028     }
2029 }
2030
2031 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2032 {
2033     struct capture_callback *cb;
2034
2035     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2036         if (cb->opaque == cb_opaque) {
2037             cb->ops.destroy (cb_opaque);
2038             QLIST_REMOVE (cb, entries);
2039             g_free (cb);
2040
2041             if (!cap->cb_head.lh_first) {
2042                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2043
2044                 while (sw) {
2045                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2046 #ifdef DEBUG_CAPTURE
2047                     dolog ("freeing %s\n", sw->name);
2048 #endif
2049
2050                     sw1 = sw->entries.le_next;
2051                     if (sw->rate) {
2052                         st_rate_stop (sw->rate);
2053                         sw->rate = NULL;
2054                     }
2055                     QLIST_REMOVE (sw, entries);
2056                     QLIST_REMOVE (sc, entries);
2057                     g_free (sc);
2058                     sw = sw1;
2059                 }
2060                 QLIST_REMOVE (cap, entries);
2061                 g_free (cap->hw.mix_buf);
2062                 g_free (cap->buf);
2063                 g_free (cap);
2064             }
2065             return;
2066         }
2067     }
2068 }
2069
2070 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2071 {
2072     if (sw) {
2073         HWVoiceOut *hw = sw->hw;
2074
2075         sw->vol.mute = mute;
2076         sw->vol.l = nominal_volume.l * lvol / 255;
2077         sw->vol.r = nominal_volume.r * rvol / 255;
2078
2079         if (hw->pcm_ops->ctl_out) {
2080             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2081         }
2082     }
2083 }
2084
2085 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2086 {
2087     if (sw) {
2088         HWVoiceIn *hw = sw->hw;
2089
2090         sw->vol.mute = mute;
2091         sw->vol.l = nominal_volume.l * lvol / 255;
2092         sw->vol.r = nominal_volume.r * rvol / 255;
2093
2094         if (hw->pcm_ops->ctl_in) {
2095             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2096         }
2097     }
2098 }