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
  31 #define AUDIO_CAP "audio"
  32 #include "audio_int.h"
  33
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37 /* #define DEBUG_POLL */
  38
  39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  40
  41
  42 /* Order of CONFIG_AUDIO_DRIVERS is import.
  43    The 1st one is the one used by default, that is the reason
  44     that we generate the list.
  45 */
  46 static struct audio_driver *drvtab[] = {
  47 #ifdef CONFIG_SPICE
  48     &spice_audio_driver,
  49 #endif
  50     CONFIG_AUDIO_DRIVERS
  51     &no_audio_driver,
  52     &wav_audio_driver
  53 };
  54
  55 struct fixed_settings {
  56     int enabled;
  57     int nb_voices;
  58     int greedy;
  59     struct audsettings settings;
  60 };
  61
  62 static struct {
  63     struct fixed_settings fixed_out;
  64     struct fixed_settings fixed_in;
  65     union {
  66         int hertz;
  67         int64_t ticks;
  68     } period;
  69     int try_poll_in;
  70     int try_poll_out;
  71 } conf = {
  72     .fixed_out = { /* DAC fixed settings */
  73         .enabled = 1,
  74         .nb_voices = 1,
  75         .greedy = 1,
  76         .settings = {
  77             .freq = 44100,
  78             .nchannels = 2,
  79             .fmt = AUD_FMT_S16,
  80             .endianness =  AUDIO_HOST_ENDIANNESS,
  81         }
  82     },
  83
  84     .fixed_in = { /* ADC fixed settings */
  85         .enabled = 1,
  86         .nb_voices = 1,
  87         .greedy = 1,
  88         .settings = {
  89             .freq = 44100,
  90             .nchannels = 2,
  91             .fmt = AUD_FMT_S16,
  92             .endianness = AUDIO_HOST_ENDIANNESS,
  93         }
  94     },
  95
  96     .period = { .hertz = 100 },
  97     .try_poll_in = 1,
  98     .try_poll_out = 1,
  99 };
 100
 101 static AudioState glob_audio_state;
 102
 103 const struct mixeng_volume nominal_volume = {
 104     .mute = 0,
 105 #ifdef FLOAT_MIXENG
 106     .r = 1.0,
 107     .l = 1.0,
 108 #else
 109     .r = 1ULL << 32,
 110     .l = 1ULL << 32,
 111 #endif
 112 };
 113
 114 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 115 #error No its not
 116 #else
 117 static void audio_print_options (const char *prefix,
 118                                  struct audio_option *opt);
 119
 120 int audio_bug (const char *funcname, int cond)
 121 {
 122     if (cond) {
 123         static int shown;
 124
 125         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 126         if (!shown) {
 127             struct audio_driver *d;
 128
 129             shown = 1;
 130             AUD_log (NULL, "Save all your work and restart without audio\n");
 131             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 132             AUD_log (NULL, "I am sorry\n");
 133             d = glob_audio_state.drv;
 134             if (d) {
 135                 audio_print_options (d->name, d->options);
 136             }
 137         }
 138         AUD_log (NULL, "Context:\n");
 139
 140 #if defined AUDIO_BREAKPOINT_ON_BUG
 141 #  if defined HOST_I386
 142 #    if defined __GNUC__
 143         __asm__ ("int3");
 144 #    elif defined _MSC_VER
 145         _asm _emit 0xcc;
 146 #    else
 147         abort ();
 148 #    endif
 149 #  else
 150         abort ();
 151 #  endif
 152 #endif
 153     }
 154
 155     return cond;
 156 }
 157 #endif
 158
 159 static inline int audio_bits_to_index (int bits)
 160 {
 161     switch (bits) {
 162     case 8:
 163         return 0;
 164
 165     case 16:
 166         return 1;
 167
 168     case 32:
 169         return 2;
 170
 171     default:
 172         audio_bug ("bits_to_index", 1);
 173         AUD_log (NULL, "invalid bits %d\n", bits);
 174         return 0;
 175     }
 176 }
 177
 178 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 179 {
 180     int cond;
 181     size_t len;
 182
 183     len = nmemb * size;
 184     cond = !nmemb || !size;
 185     cond |= nmemb < 0;
 186     cond |= len < size;
 187
 188     if (audio_bug ("audio_calloc", cond)) {
 189         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 190                  funcname);
 191         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 192         return NULL;
 193     }
 194
 195     return g_malloc0 (len);
 196 }
 197
 198 static char *audio_alloc_prefix (const char *s)
 199 {
 200     const char qemu_prefix[] = "QEMU_";
 201     size_t len, i;
 202     char *r, *u;
 203
 204     if (!s) {
 205         return NULL;
 206     }
 207
 208     len = strlen (s);
 209     r = g_malloc (len + sizeof (qemu_prefix));
 210
 211     u = r + sizeof (qemu_prefix) - 1;
 212
 213     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 214     pstrcat (r, len + sizeof (qemu_prefix), s);
 215
 216     for (i = 0; i < len; ++i) {
 217         u[i] = qemu_toupper(u[i]);
 218     }
 219
 220     return r;
 221 }
 222
 223 static const char *audio_audfmt_to_string (audfmt_e fmt)
 224 {
 225     switch (fmt) {
 226     case AUD_FMT_U8:
 227         return "U8";
 228
 229     case AUD_FMT_U16:
 230         return "U16";
 231
 232     case AUD_FMT_S8:
 233         return "S8";
 234
 235     case AUD_FMT_S16:
 236         return "S16";
 237
 238     case AUD_FMT_U32:
 239         return "U32";
 240
 241     case AUD_FMT_S32:
 242         return "S32";
 243     }
 244
 245     dolog ("Bogus audfmt %d returning S16\n", fmt);
 246     return "S16";
 247 }
 248
 249 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 250                                         int *defaultp)
 251 {
 252     if (!strcasecmp (s, "u8")) {
 253         *defaultp = 0;
 254         return AUD_FMT_U8;
 255     }
 256     else if (!strcasecmp (s, "u16")) {
 257         *defaultp = 0;
 258         return AUD_FMT_U16;
 259     }
 260     else if (!strcasecmp (s, "u32")) {
 261         *defaultp = 0;
 262         return AUD_FMT_U32;
 263     }
 264     else if (!strcasecmp (s, "s8")) {
 265         *defaultp = 0;
 266         return AUD_FMT_S8;
 267     }
 268     else if (!strcasecmp (s, "s16")) {
 269         *defaultp = 0;
 270         return AUD_FMT_S16;
 271     }
 272     else if (!strcasecmp (s, "s32")) {
 273         *defaultp = 0;
 274         return AUD_FMT_S32;
 275     }
 276     else {
 277         dolog ("Bogus audio format `%s' using %s\n",
 278                s, audio_audfmt_to_string (defval));
 279         *defaultp = 1;
 280         return defval;
 281     }
 282 }
 283
 284 static audfmt_e audio_get_conf_fmt (const char *envname,
 285                                     audfmt_e defval,
 286                                     int *defaultp)
 287 {
 288     const char *var = getenv (envname);
 289     if (!var) {
 290         *defaultp = 1;
 291         return defval;
 292     }
 293     return audio_string_to_audfmt (var, defval, defaultp);
 294 }
 295
 296 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 297 {
 298     int val;
 299     char *strval;
 300
 301     strval = getenv (key);
 302     if (strval) {
 303         *defaultp = 0;
 304         val = atoi (strval);
 305         return val;
 306     }
 307     else {
 308         *defaultp = 1;
 309         return defval;
 310     }
 311 }
 312
 313 static const char *audio_get_conf_str (const char *key,
 314                                        const char *defval,
 315                                        int *defaultp)
 316 {
 317     const char *val = getenv (key);
 318     if (!val) {
 319         *defaultp = 1;
 320         return defval;
 321     }
 322     else {
 323         *defaultp = 0;
 324         return val;
 325     }
 326 }
 327
 328 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 329 {
 330     if (cap) {
 331         fprintf(stderr, "%s: ", cap);
 332     }
 333
 334     vfprintf(stderr, fmt, ap);
 335 }
 336
 337 void AUD_log (const char *cap, const char *fmt, ...)
 338 {
 339     va_list ap;
 340
 341     va_start (ap, fmt);
 342     AUD_vlog (cap, fmt, ap);
 343     va_end (ap);
 344 }
 345
 346 static void audio_print_options (const char *prefix,
 347                                  struct audio_option *opt)
 348 {
 349     char *uprefix;
 350
 351     if (!prefix) {
 352         dolog ("No prefix specified\n");
 353         return;
 354     }
 355
 356     if (!opt) {
 357         dolog ("No options\n");
 358         return;
 359     }
 360
 361     uprefix = audio_alloc_prefix (prefix);
 362
 363     for (; opt->name; opt++) {
 364         const char *state = "default";
 365         printf ("  %s_%s: ", uprefix, opt->name);
 366
 367         if (opt->overriddenp && *opt->overriddenp) {
 368             state = "current";
 369         }
 370
 371         switch (opt->tag) {
 372         case AUD_OPT_BOOL:
 373             {
 374                 int *intp = opt->valp;
 375                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 376             }
 377             break;
 378
 379         case AUD_OPT_INT:
 380             {
 381                 int *intp = opt->valp;
 382                 printf ("integer, %s = %d\n", state, *intp);
 383             }
 384             break;
 385
 386         case AUD_OPT_FMT:
 387             {
 388                 audfmt_e *fmtp = opt->valp;
 389                 printf (
 390                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 391                     state,
 392                     audio_audfmt_to_string (*fmtp)
 393                     );
 394             }
 395             break;
 396
 397         case AUD_OPT_STR:
 398             {
 399                 const char **strp = opt->valp;
 400                 printf ("string, %s = %s\n",
 401                         state,
 402                         *strp ? *strp : "(not set)");
 403             }
 404             break;
 405
 406         default:
 407             printf ("???\n");
 408             dolog ("Bad value tag for option %s_%s %d\n",
 409                    uprefix, opt->name, opt->tag);
 410             break;
 411         }
 412         printf ("    %s\n", opt->descr);
 413     }
 414
 415     g_free (uprefix);
 416 }
 417
 418 static void audio_process_options (const char *prefix,
 419                                    struct audio_option *opt)
 420 {
 421     char *optname;
 422     const char qemu_prefix[] = "QEMU_";
 423     size_t preflen, optlen;
 424
 425     if (audio_bug (AUDIO_FUNC, !prefix)) {
 426         dolog ("prefix = NULL\n");
 427         return;
 428     }
 429
 430     if (audio_bug (AUDIO_FUNC, !opt)) {
 431         dolog ("opt = NULL\n");
 432         return;
 433     }
 434
 435     preflen = strlen (prefix);
 436
 437     for (; opt->name; opt++) {
 438         size_t len, i;
 439         int def;
 440
 441         if (!opt->valp) {
 442             dolog ("Option value pointer for `%s' is not set\n",
 443                    opt->name);
 444             continue;
 445         }
 446
 447         len = strlen (opt->name);
 448         /* len of opt->name + len of prefix + size of qemu_prefix
 449          * (includes trailing zero) + zero + underscore (on behalf of
 450          * sizeof) */
 451         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 452         optname = g_malloc (optlen);
 453
 454         pstrcpy (optname, optlen, qemu_prefix);
 455
 456         /* copy while upper-casing, including trailing zero */
 457         for (i = 0; i <= preflen; ++i) {
 458             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 459         }
 460         pstrcat (optname, optlen, "_");
 461         pstrcat (optname, optlen, opt->name);
 462
 463         def = 1;
 464         switch (opt->tag) {
 465         case AUD_OPT_BOOL:
 466         case AUD_OPT_INT:
 467             {
 468                 int *intp = opt->valp;
 469                 *intp = audio_get_conf_int (optname, *intp, &def);
 470             }
 471             break;
 472
 473         case AUD_OPT_FMT:
 474             {
 475                 audfmt_e *fmtp = opt->valp;
 476                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 477             }
 478             break;
 479
 480         case AUD_OPT_STR:
 481             {
 482                 const char **strp = opt->valp;
 483                 *strp = audio_get_conf_str (optname, *strp, &def);
 484             }
 485             break;
 486
 487         default:
 488             dolog ("Bad value tag for option `%s' - %d\n",
 489                    optname, opt->tag);
 490             break;
 491         }
 492
 493         if (!opt->overriddenp) {
 494             opt->overriddenp = &opt->overridden;
 495         }
 496         *opt->overriddenp = !def;
 497         g_free (optname);
 498     }
 499 }
 500
 501 static void audio_print_settings (struct audsettings *as)
 502 {
 503     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 504
 505     switch (as->fmt) {
 506     case AUD_FMT_S8:
 507         AUD_log (NULL, "S8");
 508         break;
 509     case AUD_FMT_U8:
 510         AUD_log (NULL, "U8");
 511         break;
 512     case AUD_FMT_S16:
 513         AUD_log (NULL, "S16");
 514         break;
 515     case AUD_FMT_U16:
 516         AUD_log (NULL, "U16");
 517         break;
 518     case AUD_FMT_S32:
 519         AUD_log (NULL, "S32");
 520         break;
 521     case AUD_FMT_U32:
 522         AUD_log (NULL, "U32");
 523         break;
 524     default:
 525         AUD_log (NULL, "invalid(%d)", as->fmt);
 526         break;
 527     }
 528
 529     AUD_log (NULL, " endianness=");
 530     switch (as->endianness) {
 531     case 0:
 532         AUD_log (NULL, "little");
 533         break;
 534     case 1:
 535         AUD_log (NULL, "big");
 536         break;
 537     default:
 538         AUD_log (NULL, "invalid");
 539         break;
 540     }
 541     AUD_log (NULL, "\n");
 542 }
 543
 544 static int audio_validate_settings (struct audsettings *as)
 545 {
 546     int invalid;
 547
 548     invalid = as->nchannels != 1 && as->nchannels != 2;
 549     invalid |= as->endianness != 0 && as->endianness != 1;
 550
 551     switch (as->fmt) {
 552     case AUD_FMT_S8:
 553     case AUD_FMT_U8:
 554     case AUD_FMT_S16:
 555     case AUD_FMT_U16:
 556     case AUD_FMT_S32:
 557     case AUD_FMT_U32:
 558         break;
 559     default:
 560         invalid = 1;
 561         break;
 562     }
 563
 564     invalid |= as->freq <= 0;
 565     return invalid ? -1 : 0;
 566 }
 567
 568 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 569 {
 570     int bits = 8, sign = 0;
 571
 572     switch (as->fmt) {
 573     case AUD_FMT_S8:
 574         sign = 1;
 575         /* fall through */
 576     case AUD_FMT_U8:
 577         break;
 578
 579     case AUD_FMT_S16:
 580         sign = 1;
 581         /* fall through */
 582     case AUD_FMT_U16:
 583         bits = 16;
 584         break;
 585
 586     case AUD_FMT_S32:
 587         sign = 1;
 588         /* fall through */
 589     case AUD_FMT_U32:
 590         bits = 32;
 591         break;
 592     }
 593     return info->freq == as->freq
 594         && info->nchannels == as->nchannels
 595         && info->sign == sign
 596         && info->bits == bits
 597         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 598 }
 599
 600 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 601 {
 602     int bits = 8, sign = 0, shift = 0;
 603
 604     switch (as->fmt) {
 605     case AUD_FMT_S8:
 606         sign = 1;
 607     case AUD_FMT_U8:
 608         break;
 609
 610     case AUD_FMT_S16:
 611         sign = 1;
 612     case AUD_FMT_U16:
 613         bits = 16;
 614         shift = 1;
 615         break;
 616
 617     case AUD_FMT_S32:
 618         sign = 1;
 619     case AUD_FMT_U32:
 620         bits = 32;
 621         shift = 2;
 622         break;
 623     }
 624
 625     info->freq = as->freq;
 626     info->bits = bits;
 627     info->sign = sign;
 628     info->nchannels = as->nchannels;
 629     info->shift = (as->nchannels == 2) + shift;
 630     info->align = (1 << info->shift) - 1;
 631     info->bytes_per_second = info->freq << info->shift;
 632     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 633 }
 634
 635 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 636 {
 637     if (!len) {
 638         return;
 639     }
 640
 641     if (info->sign) {
 642         memset (buf, 0x00, len << info->shift);
 643     }
 644     else {
 645         switch (info->bits) {
 646         case 8:
 647             memset (buf, 0x80, len << info->shift);
 648             break;
 649
 650         case 16:
 651             {
 652                 int i;
 653                 uint16_t *p = buf;
 654                 int shift = info->nchannels - 1;
 655                 short s = INT16_MAX;
 656
 657                 if (info->swap_endianness) {
 658                     s = bswap16 (s);
 659                 }
 660
 661                 for (i = 0; i < len << shift; i++) {
 662                     p[i] = s;
 663                 }
 664             }
 665             break;
 666
 667         case 32:
 668             {
 669                 int i;
 670                 uint32_t *p = buf;
 671                 int shift = info->nchannels - 1;
 672                 int32_t s = INT32_MAX;
 673
 674                 if (info->swap_endianness) {
 675                     s = bswap32 (s);
 676                 }
 677
 678                 for (i = 0; i < len << shift; i++) {
 679                     p[i] = s;
 680                 }
 681             }
 682             break;
 683
 684         default:
 685             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 686                      info->bits);
 687             break;
 688         }
 689     }
 690 }
 691
 692 /*
 693  * Capture
 694  */
 695 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 696 {
 697     (void) src;
 698     (void) dst;
 699     (void) samples;
 700 }
 701
 702 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 703     struct audsettings *as
 704     )
 705 {
 706     CaptureVoiceOut *cap;
 707     AudioState *s = &glob_audio_state;
 708
 709     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 710         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 711             return cap;
 712         }
 713     }
 714     return NULL;
 715 }
 716
 717 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 718 {
 719     struct capture_callback *cb;
 720
 721 #ifdef DEBUG_CAPTURE
 722     dolog ("notification %d sent\n", cmd);
 723 #endif
 724     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 725         cb->ops.notify (cb->opaque, cmd);
 726     }
 727 }
 728
 729 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 730 {
 731     if (cap->hw.enabled != enabled) {
 732         audcnotification_e cmd;
 733         cap->hw.enabled = enabled;
 734         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 735         audio_notify_capture (cap, cmd);
 736     }
 737 }
 738
 739 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 740 {
 741     HWVoiceOut *hw = &cap->hw;
 742     SWVoiceOut *sw;
 743     int enabled = 0;
 744
 745     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 746         if (sw->active) {
 747             enabled = 1;
 748             break;
 749         }
 750     }
 751     audio_capture_maybe_changed (cap, enabled);
 752 }
 753
 754 static void audio_detach_capture (HWVoiceOut *hw)
 755 {
 756     SWVoiceCap *sc = hw->cap_head.lh_first;
 757
 758     while (sc) {
 759         SWVoiceCap *sc1 = sc->entries.le_next;
 760         SWVoiceOut *sw = &sc->sw;
 761         CaptureVoiceOut *cap = sc->cap;
 762         int was_active = sw->active;
 763
 764         if (sw->rate) {
 765             st_rate_stop (sw->rate);
 766             sw->rate = NULL;
 767         }
 768
 769         QLIST_REMOVE (sw, entries);
 770         QLIST_REMOVE (sc, entries);
 771         g_free (sc);
 772         if (was_active) {
 773             /* We have removed soft voice from the capture:
 774                this might have changed the overall status of the capture
 775                since this might have been the only active voice */
 776             audio_recalc_and_notify_capture (cap);
 777         }
 778         sc = sc1;
 779     }
 780 }
 781
 782 static int audio_attach_capture (HWVoiceOut *hw)
 783 {
 784     AudioState *s = &glob_audio_state;
 785     CaptureVoiceOut *cap;
 786
 787     audio_detach_capture (hw);
 788     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 789         SWVoiceCap *sc;
 790         SWVoiceOut *sw;
 791         HWVoiceOut *hw_cap = &cap->hw;
 792
 793         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 794         if (!sc) {
 795             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 796                    sizeof (*sc));
 797             return -1;
 798         }
 799
 800         sc->cap = cap;
 801         sw = &sc->sw;
 802         sw->hw = hw_cap;
 803         sw->info = hw->info;
 804         sw->empty = 1;
 805         sw->active = hw->enabled;
 806         sw->conv = noop_conv;
 807         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 808         sw->vol = nominal_volume;
 809         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 810         if (!sw->rate) {
 811             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 812             g_free (sw);
 813             return -1;
 814         }
 815         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 816         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 817 #ifdef DEBUG_CAPTURE
 818         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 819                                     hw, sw->info.freq, sw->info.bits,
 820                                     sw->info.nchannels);
 821         dolog ("Added %s active = %d\n", sw->name, sw->active);
 822 #endif
 823         if (sw->active) {
 824             audio_capture_maybe_changed (cap, 1);
 825         }
 826     }
 827     return 0;
 828 }
 829
 830 /*
 831  * Hard voice (capture)
 832  */
 833 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 834 {
 835     SWVoiceIn *sw;
 836     int m = hw->total_samples_captured;
 837
 838     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 839         if (sw->active) {
 840             m = audio_MIN (m, sw->total_hw_samples_acquired);
 841         }
 842     }
 843     return m;
 844 }
 845
 846 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 847 {
 848     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 849     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 850         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 851         return 0;
 852     }
 853     return live;
 854 }
 855
 856 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 857                            int live, int pending)
 858 {
 859     int left = hw->samples - pending;
 860     int len = audio_MIN (left, live);
 861     int clipped = 0;
 862
 863     while (len) {
 864         struct st_sample *src = hw->mix_buf + hw->rpos;
 865         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 866         int samples_till_end_of_buf = hw->samples - hw->rpos;
 867         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 868
 869         hw->clip (dst, src, samples_to_clip);
 870
 871         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 872         len -= samples_to_clip;
 873         clipped += samples_to_clip;
 874     }
 875     return clipped;
 876 }
 877
 878 /*
 879  * Soft voice (capture)
 880  */
 881 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 882 {
 883     HWVoiceIn *hw = sw->hw;
 884     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 885     int rpos;
 886
 887     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 888         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 889         return 0;
 890     }
 891
 892     rpos = hw->wpos - live;
 893     if (rpos >= 0) {
 894         return rpos;
 895     }
 896     else {
 897         return hw->samples + rpos;
 898     }
 899 }
 900
 901 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 902 {
 903     HWVoiceIn *hw = sw->hw;
 904     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 905     struct st_sample *src, *dst = sw->buf;
 906
 907     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 908
 909     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 910     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 911         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 912         return 0;
 913     }
 914
 915     samples = size >> sw->info.shift;
 916     if (!live) {
 917         return 0;
 918     }
 919
 920     swlim = (live * sw->ratio) >> 32;
 921     swlim = audio_MIN (swlim, samples);
 922
 923     while (swlim) {
 924         src = hw->conv_buf + rpos;
 925         isamp = hw->wpos - rpos;
 926         /* XXX: <= ? */
 927         if (isamp <= 0) {
 928             isamp = hw->samples - rpos;
 929         }
 930
 931         if (!isamp) {
 932             break;
 933         }
 934         osamp = swlim;
 935
 936         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 937             dolog ("osamp=%d\n", osamp);
 938             return 0;
 939         }
 940
 941         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 942         swlim -= osamp;
 943         rpos = (rpos + isamp) % hw->samples;
 944         dst += osamp;
 945         ret += osamp;
 946         total += isamp;
 947     }
 948
 949     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 950         mixeng_volume (sw->buf, ret, &sw->vol);
 951     }
 952
 953     sw->clip (buf, sw->buf, ret);
 954     sw->total_hw_samples_acquired += total;
 955     return ret << sw->info.shift;
 956 }
 957
 958 /*
 959  * Hard voice (playback)
 960  */
 961 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 962 {
 963     SWVoiceOut *sw;
 964     int m = INT_MAX;
 965     int nb_live = 0;
 966
 967     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 968         if (sw->active || !sw->empty) {
 969             m = audio_MIN (m, sw->total_hw_samples_mixed);
 970             nb_live += 1;
 971         }
 972     }
 973
 974     *nb_livep = nb_live;
 975     return m;
 976 }
 977
 978 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 979 {
 980     int smin;
 981     int nb_live1;
 982
 983     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 984     if (nb_live) {
 985         *nb_live = nb_live1;
 986     }
 987
 988     if (nb_live1) {
 989         int live = smin;
 990
 991         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 992             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 993             return 0;
 994         }
 995         return live;
 996     }
 997     return 0;
 998 }
 999
1000 /*
1001  * Soft voice (playback)
1002  */
1003 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1004 {
1005     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1006     int ret = 0, pos = 0, total = 0;
1007
1008     if (!sw) {
1009         return size;
1010     }
1011
1012     hwsamples = sw->hw->samples;
1013
1014     live = sw->total_hw_samples_mixed;
1015     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1016         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1017         return 0;
1018     }
1019
1020     if (live == hwsamples) {
1021 #ifdef DEBUG_OUT
1022         dolog ("%s is full %d\n", sw->name, live);
1023 #endif
1024         return 0;
1025     }
1026
1027     wpos = (sw->hw->rpos + live) % hwsamples;
1028     samples = size >> sw->info.shift;
1029
1030     dead = hwsamples - live;
1031     swlim = ((int64_t) dead << 32) / sw->ratio;
1032     swlim = audio_MIN (swlim, samples);
1033     if (swlim) {
1034         sw->conv (sw->buf, buf, swlim);
1035
1036         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1037             mixeng_volume (sw->buf, swlim, &sw->vol);
1038         }
1039     }
1040
1041     while (swlim) {
1042         dead = hwsamples - live;
1043         left = hwsamples - wpos;
1044         blck = audio_MIN (dead, left);
1045         if (!blck) {
1046             break;
1047         }
1048         isamp = swlim;
1049         osamp = blck;
1050         st_rate_flow_mix (
1051             sw->rate,
1052             sw->buf + pos,
1053             sw->hw->mix_buf + wpos,
1054             &isamp,
1055             &osamp
1056             );
1057         ret += isamp;
1058         swlim -= isamp;
1059         pos += isamp;
1060         live += osamp;
1061         wpos = (wpos + osamp) % hwsamples;
1062         total += osamp;
1063     }
1064
1065     sw->total_hw_samples_mixed += total;
1066     sw->empty = sw->total_hw_samples_mixed == 0;
1067
1068 #ifdef DEBUG_OUT
1069     dolog (
1070         "%s: write size %d ret %d total sw %d\n",
1071         SW_NAME (sw),
1072         size >> sw->info.shift,
1073         ret,
1074         sw->total_hw_samples_mixed
1075         );
1076 #endif
1077
1078     return ret << sw->info.shift;
1079 }
1080
1081 #ifdef DEBUG_AUDIO
1082 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1083 {
1084     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1085            cap, info->bits, info->sign, info->freq, info->nchannels);
1086 }
1087 #endif
1088
1089 #define DAC
1090 #include "audio_template.h"
1091 #undef DAC
1092 #include "audio_template.h"
1093
1094 /*
1095  * Timer
1096  */
1097 static int audio_is_timer_needed (void)
1098 {
1099     HWVoiceIn *hwi = NULL;
1100     HWVoiceOut *hwo = NULL;
1101
1102     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1103         if (!hwo->poll_mode) return 1;
1104     }
1105     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1106         if (!hwi->poll_mode) return 1;
1107     }
1108     return 0;
1109 }
1110
1111 static void audio_reset_timer (AudioState *s)
1112 {
1113     if (audio_is_timer_needed ()) {
1114         timer_mod (s->ts,
1115             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
1116     }
1117     else {
1118         timer_del (s->ts);
1119     }
1120 }
1121
1122 static void audio_timer (void *opaque)
1123 {
1124     audio_run ("timer");
1125     audio_reset_timer (opaque);
1126 }
1127
1128 /*
1129  * Public API
1130  */
1131 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1132 {
1133     int bytes;
1134
1135     if (!sw) {
1136         /* XXX: Consider options */
1137         return size;
1138     }
1139
1140     if (!sw->hw->enabled) {
1141         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1142         return 0;
1143     }
1144
1145     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1146     return bytes;
1147 }
1148
1149 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1150 {
1151     int bytes;
1152
1153     if (!sw) {
1154         /* XXX: Consider options */
1155         return size;
1156     }
1157
1158     if (!sw->hw->enabled) {
1159         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1160         return 0;
1161     }
1162
1163     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1164     return bytes;
1165 }
1166
1167 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1168 {
1169     return sw->hw->samples << sw->hw->info.shift;
1170 }
1171
1172 void AUD_set_active_out (SWVoiceOut *sw, int on)
1173 {
1174     HWVoiceOut *hw;
1175
1176     if (!sw) {
1177         return;
1178     }
1179
1180     hw = sw->hw;
1181     if (sw->active != on) {
1182         AudioState *s = &glob_audio_state;
1183         SWVoiceOut *temp_sw;
1184         SWVoiceCap *sc;
1185
1186         if (on) {
1187             hw->pending_disable = 0;
1188             if (!hw->enabled) {
1189                 hw->enabled = 1;
1190                 if (s->vm_running) {
1191                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1192                     audio_reset_timer (s);
1193                 }
1194             }
1195         }
1196         else {
1197             if (hw->enabled) {
1198                 int nb_active = 0;
1199
1200                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1201                      temp_sw = temp_sw->entries.le_next) {
1202                     nb_active += temp_sw->active != 0;
1203                 }
1204
1205                 hw->pending_disable = nb_active == 1;
1206             }
1207         }
1208
1209         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1210             sc->sw.active = hw->enabled;
1211             if (hw->enabled) {
1212                 audio_capture_maybe_changed (sc->cap, 1);
1213             }
1214         }
1215         sw->active = on;
1216     }
1217 }
1218
1219 void AUD_set_active_in (SWVoiceIn *sw, int on)
1220 {
1221     HWVoiceIn *hw;
1222
1223     if (!sw) {
1224         return;
1225     }
1226
1227     hw = sw->hw;
1228     if (sw->active != on) {
1229         AudioState *s = &glob_audio_state;
1230         SWVoiceIn *temp_sw;
1231
1232         if (on) {
1233             if (!hw->enabled) {
1234                 hw->enabled = 1;
1235                 if (s->vm_running) {
1236                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1237                     audio_reset_timer (s);
1238                 }
1239             }
1240             sw->total_hw_samples_acquired = hw->total_samples_captured;
1241         }
1242         else {
1243             if (hw->enabled) {
1244                 int nb_active = 0;
1245
1246                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1247                      temp_sw = temp_sw->entries.le_next) {
1248                     nb_active += temp_sw->active != 0;
1249                 }
1250
1251                 if (nb_active == 1) {
1252                     hw->enabled = 0;
1253                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1254                 }
1255             }
1256         }
1257         sw->active = on;
1258     }
1259 }
1260
1261 static int audio_get_avail (SWVoiceIn *sw)
1262 {
1263     int live;
1264
1265     if (!sw) {
1266         return 0;
1267     }
1268
1269     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1270     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1271         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1272         return 0;
1273     }
1274
1275     ldebug (
1276         "%s: get_avail live %d ret %" PRId64 "\n",
1277         SW_NAME (sw),
1278         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1279         );
1280
1281     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1282 }
1283
1284 static int audio_get_free (SWVoiceOut *sw)
1285 {
1286     int live, dead;
1287
1288     if (!sw) {
1289         return 0;
1290     }
1291
1292     live = sw->total_hw_samples_mixed;
1293
1294     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1295         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1296         return 0;
1297     }
1298
1299     dead = sw->hw->samples - live;
1300
1301 #ifdef DEBUG_OUT
1302     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1303            SW_NAME (sw),
1304            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1305 #endif
1306
1307     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1308 }
1309
1310 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1311 {
1312     int n;
1313
1314     if (hw->enabled) {
1315         SWVoiceCap *sc;
1316
1317         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1318             SWVoiceOut *sw = &sc->sw;
1319             int rpos2 = rpos;
1320
1321             n = samples;
1322             while (n) {
1323                 int till_end_of_hw = hw->samples - rpos2;
1324                 int to_write = audio_MIN (till_end_of_hw, n);
1325                 int bytes = to_write << hw->info.shift;
1326                 int written;
1327
1328                 sw->buf = hw->mix_buf + rpos2;
1329                 written = audio_pcm_sw_write (sw, NULL, bytes);
1330                 if (written - bytes) {
1331                     dolog ("Could not mix %d bytes into a capture "
1332                            "buffer, mixed %d\n",
1333                            bytes, written);
1334                     break;
1335                 }
1336                 n -= to_write;
1337                 rpos2 = (rpos2 + to_write) % hw->samples;
1338             }
1339         }
1340     }
1341
1342     n = audio_MIN (samples, hw->samples - rpos);
1343     mixeng_clear (hw->mix_buf + rpos, n);
1344     mixeng_clear (hw->mix_buf, samples - n);
1345 }
1346
1347 static void audio_run_out (AudioState *s)
1348 {
1349     HWVoiceOut *hw = NULL;
1350     SWVoiceOut *sw;
1351
1352     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1353         int played;
1354         int live, free, nb_live, cleanup_required, prev_rpos;
1355
1356         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1357         if (!nb_live) {
1358             live = 0;
1359         }
1360
1361         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1362             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1363             continue;
1364         }
1365
1366         if (hw->pending_disable && !nb_live) {
1367             SWVoiceCap *sc;
1368 #ifdef DEBUG_OUT
1369             dolog ("Disabling voice\n");
1370 #endif
1371             hw->enabled = 0;
1372             hw->pending_disable = 0;
1373             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1374             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1375                 sc->sw.active = 0;
1376                 audio_recalc_and_notify_capture (sc->cap);
1377             }
1378             continue;
1379         }
1380
1381         if (!live) {
1382             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1383                 if (sw->active) {
1384                     free = audio_get_free (sw);
1385                     if (free > 0) {
1386                         sw->callback.fn (sw->callback.opaque, free);
1387                     }
1388                 }
1389             }
1390             continue;
1391         }
1392
1393         prev_rpos = hw->rpos;
1394         played = hw->pcm_ops->run_out (hw, live);
1395         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1396             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1397                    hw->rpos, hw->samples, played);
1398             hw->rpos = 0;
1399         }
1400
1401 #ifdef DEBUG_OUT
1402         dolog ("played=%d\n", played);
1403 #endif
1404
1405         if (played) {
1406             hw->ts_helper += played;
1407             audio_capture_mix_and_clear (hw, prev_rpos, played);
1408         }
1409
1410         cleanup_required = 0;
1411         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1412             if (!sw->active && sw->empty) {
1413                 continue;
1414             }
1415
1416             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1417                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1418                        played, sw->total_hw_samples_mixed);
1419                 played = sw->total_hw_samples_mixed;
1420             }
1421
1422             sw->total_hw_samples_mixed -= played;
1423
1424             if (!sw->total_hw_samples_mixed) {
1425                 sw->empty = 1;
1426                 cleanup_required |= !sw->active && !sw->callback.fn;
1427             }
1428
1429             if (sw->active) {
1430                 free = audio_get_free (sw);
1431                 if (free > 0) {
1432                     sw->callback.fn (sw->callback.opaque, free);
1433                 }
1434             }
1435         }
1436
1437         if (cleanup_required) {
1438             SWVoiceOut *sw1;
1439
1440             sw = hw->sw_head.lh_first;
1441             while (sw) {
1442                 sw1 = sw->entries.le_next;
1443                 if (!sw->active && !sw->callback.fn) {
1444                     audio_close_out (sw);
1445                 }
1446                 sw = sw1;
1447             }
1448         }
1449     }
1450 }
1451
1452 static void audio_run_in (AudioState *s)
1453 {
1454     HWVoiceIn *hw = NULL;
1455
1456     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1457         SWVoiceIn *sw;
1458         int captured, min;
1459
1460         captured = hw->pcm_ops->run_in (hw);
1461
1462         min = audio_pcm_hw_find_min_in (hw);
1463         hw->total_samples_captured += captured - min;
1464         hw->ts_helper += captured;
1465
1466         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1467             sw->total_hw_samples_acquired -= min;
1468
1469             if (sw->active) {
1470                 int avail;
1471
1472                 avail = audio_get_avail (sw);
1473                 if (avail > 0) {
1474                     sw->callback.fn (sw->callback.opaque, avail);
1475                 }
1476             }
1477         }
1478     }
1479 }
1480
1481 static void audio_run_capture (AudioState *s)
1482 {
1483     CaptureVoiceOut *cap;
1484
1485     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1486         int live, rpos, captured;
1487         HWVoiceOut *hw = &cap->hw;
1488         SWVoiceOut *sw;
1489
1490         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1491         rpos = hw->rpos;
1492         while (live) {
1493             int left = hw->samples - rpos;
1494             int to_capture = audio_MIN (live, left);
1495             struct st_sample *src;
1496             struct capture_callback *cb;
1497
1498             src = hw->mix_buf + rpos;
1499             hw->clip (cap->buf, src, to_capture);
1500             mixeng_clear (src, to_capture);
1501
1502             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1503                 cb->ops.capture (cb->opaque, cap->buf,
1504                                  to_capture << hw->info.shift);
1505             }
1506             rpos = (rpos + to_capture) % hw->samples;
1507             live -= to_capture;
1508         }
1509         hw->rpos = rpos;
1510
1511         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1512             if (!sw->active && sw->empty) {
1513                 continue;
1514             }
1515
1516             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1517                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1518                        captured, sw->total_hw_samples_mixed);
1519                 captured = sw->total_hw_samples_mixed;
1520             }
1521
1522             sw->total_hw_samples_mixed -= captured;
1523             sw->empty = sw->total_hw_samples_mixed == 0;
1524         }
1525     }
1526 }
1527
1528 void audio_run (const char *msg)
1529 {
1530     AudioState *s = &glob_audio_state;
1531
1532     audio_run_out (s);
1533     audio_run_in (s);
1534     audio_run_capture (s);
1535 #ifdef DEBUG_POLL
1536     {
1537         static double prevtime;
1538         double currtime;
1539         struct timeval tv;
1540
1541         if (gettimeofday (&tv, NULL)) {
1542             perror ("audio_run: gettimeofday");
1543             return;
1544         }
1545
1546         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1547         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1548         prevtime = currtime;
1549     }
1550 #endif
1551 }
1552
1553 static struct audio_option audio_options[] = {
1554     /* DAC */
1555     {
1556         .name  = "DAC_FIXED_SETTINGS",
1557         .tag   = AUD_OPT_BOOL,
1558         .valp  = &conf.fixed_out.enabled,
1559         .descr = "Use fixed settings for host DAC"
1560     },
1561     {
1562         .name  = "DAC_FIXED_FREQ",
1563         .tag   = AUD_OPT_INT,
1564         .valp  = &conf.fixed_out.settings.freq,
1565         .descr = "Frequency for fixed host DAC"
1566     },
1567     {
1568         .name  = "DAC_FIXED_FMT",
1569         .tag   = AUD_OPT_FMT,
1570         .valp  = &conf.fixed_out.settings.fmt,
1571         .descr = "Format for fixed host DAC"
1572     },
1573     {
1574         .name  = "DAC_FIXED_CHANNELS",
1575         .tag   = AUD_OPT_INT,
1576         .valp  = &conf.fixed_out.settings.nchannels,
1577         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1578     },
1579     {
1580         .name  = "DAC_VOICES",
1581         .tag   = AUD_OPT_INT,
1582         .valp  = &conf.fixed_out.nb_voices,
1583         .descr = "Number of voices for DAC"
1584     },
1585     {
1586         .name  = "DAC_TRY_POLL",
1587         .tag   = AUD_OPT_BOOL,
1588         .valp  = &conf.try_poll_out,
1589         .descr = "Attempt using poll mode for DAC"
1590     },
1591     /* ADC */
1592     {
1593         .name  = "ADC_FIXED_SETTINGS",
1594         .tag   = AUD_OPT_BOOL,
1595         .valp  = &conf.fixed_in.enabled,
1596         .descr = "Use fixed settings for host ADC"
1597     },
1598     {
1599         .name  = "ADC_FIXED_FREQ",
1600         .tag   = AUD_OPT_INT,
1601         .valp  = &conf.fixed_in.settings.freq,
1602         .descr = "Frequency for fixed host ADC"
1603     },
1604     {
1605         .name  = "ADC_FIXED_FMT",
1606         .tag   = AUD_OPT_FMT,
1607         .valp  = &conf.fixed_in.settings.fmt,
1608         .descr = "Format for fixed host ADC"
1609     },
1610     {
1611         .name  = "ADC_FIXED_CHANNELS",
1612         .tag   = AUD_OPT_INT,
1613         .valp  = &conf.fixed_in.settings.nchannels,
1614         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1615     },
1616     {
1617         .name  = "ADC_VOICES",
1618         .tag   = AUD_OPT_INT,
1619         .valp  = &conf.fixed_in.nb_voices,
1620         .descr = "Number of voices for ADC"
1621     },
1622     {
1623         .name  = "ADC_TRY_POLL",
1624         .tag   = AUD_OPT_BOOL,
1625         .valp  = &conf.try_poll_in,
1626         .descr = "Attempt using poll mode for ADC"
1627     },
1628     /* Misc */
1629     {
1630         .name  = "TIMER_PERIOD",
1631         .tag   = AUD_OPT_INT,
1632         .valp  = &conf.period.hertz,
1633         .descr = "Timer period in HZ (0 - use lowest possible)"
1634     },
1635     { /* End of list */ }
1636 };
1637
1638 static void audio_pp_nb_voices (const char *typ, int nb)
1639 {
1640     switch (nb) {
1641     case 0:
1642         printf ("Does not support %s\n", typ);
1643         break;
1644     case 1:
1645         printf ("One %s voice\n", typ);
1646         break;
1647     case INT_MAX:
1648         printf ("Theoretically supports many %s voices\n", typ);
1649         break;
1650     default:
1651         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1652         break;
1653     }
1654
1655 }
1656
1657 void AUD_help (void)
1658 {
1659     size_t i;
1660
1661     audio_process_options ("AUDIO", audio_options);
1662     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1663         struct audio_driver *d = drvtab[i];
1664         if (d->options) {
1665             audio_process_options (d->name, d->options);
1666         }
1667     }
1668
1669     printf ("Audio options:\n");
1670     audio_print_options ("AUDIO", audio_options);
1671     printf ("\n");
1672
1673     printf ("Available drivers:\n");
1674
1675     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1676         struct audio_driver *d = drvtab[i];
1677
1678         printf ("Name: %s\n", d->name);
1679         printf ("Description: %s\n", d->descr);
1680
1681         audio_pp_nb_voices ("playback", d->max_voices_out);
1682         audio_pp_nb_voices ("capture", d->max_voices_in);
1683
1684         if (d->options) {
1685             printf ("Options:\n");
1686             audio_print_options (d->name, d->options);
1687         }
1688         else {
1689             printf ("No options\n");
1690         }
1691         printf ("\n");
1692     }
1693
1694     printf (
1695         "Options are settable through environment variables.\n"
1696         "Example:\n"
1697 #ifdef _WIN32
1698         "  set QEMU_AUDIO_DRV=wav\n"
1699         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1700 #else
1701         "  export QEMU_AUDIO_DRV=wav\n"
1702         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1703         "(for csh replace export with setenv in the above)\n"
1704 #endif
1705         "  qemu ...\n\n"
1706         );
1707 }
1708
1709 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1710 {
1711     if (drv->options) {
1712         audio_process_options (drv->name, drv->options);
1713     }
1714     s->drv_opaque = drv->init ();
1715
1716     if (s->drv_opaque) {
1717         audio_init_nb_voices_out (drv);
1718         audio_init_nb_voices_in (drv);
1719         s->drv = drv;
1720         return 0;
1721     }
1722     else {
1723         dolog ("Could not init `%s' audio driver\n", drv->name);
1724         return -1;
1725     }
1726 }
1727
1728 static void audio_vm_change_state_handler (void *opaque, int running,
1729                                            RunState state)
1730 {
1731     AudioState *s = opaque;
1732     HWVoiceOut *hwo = NULL;
1733     HWVoiceIn *hwi = NULL;
1734     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1735
1736     s->vm_running = running;
1737     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1738         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1739     }
1740
1741     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1742         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1743     }
1744     audio_reset_timer (s);
1745 }
1746
1747 static void audio_atexit (void)
1748 {
1749     AudioState *s = &glob_audio_state;
1750     HWVoiceOut *hwo = NULL;
1751     HWVoiceIn *hwi = NULL;
1752
1753     while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
1754         SWVoiceCap *sc;
1755
1756         if (hwo->enabled) {
1757             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1758         }
1759         hwo->pcm_ops->fini_out (hwo);
1760
1761         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1762             CaptureVoiceOut *cap = sc->cap;
1763             struct capture_callback *cb;
1764
1765             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1766                 cb->ops.destroy (cb->opaque);
1767             }
1768         }
1769     }
1770
1771     while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
1772         if (hwi->enabled) {
1773             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1774         }
1775         hwi->pcm_ops->fini_in (hwi);
1776     }
1777
1778     if (s->drv) {
1779         s->drv->fini (s->drv_opaque);
1780     }
1781 }
1782
1783 static const VMStateDescription vmstate_audio = {
1784     .name = "audio",
1785     .version_id = 1,
1786     .minimum_version_id = 1,
1787     .fields = (VMStateField[]) {
1788         VMSTATE_END_OF_LIST()
1789     }
1790 };
1791
1792 static void audio_init (void)
1793 {
1794     size_t i;
1795     int done = 0;
1796     const char *drvname;
1797     VMChangeStateEntry *e;
1798     AudioState *s = &glob_audio_state;
1799
1800     if (s->drv) {
1801         return;
1802     }
1803
1804     QLIST_INIT (&s->hw_head_out);
1805     QLIST_INIT (&s->hw_head_in);
1806     QLIST_INIT (&s->cap_head);
1807     atexit (audio_atexit);
1808
1809     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1810
1811     audio_process_options ("AUDIO", audio_options);
1812
1813     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1814     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1815
1816     if (s->nb_hw_voices_out <= 0) {
1817         dolog ("Bogus number of playback voices %d, setting to 1\n",
1818                s->nb_hw_voices_out);
1819         s->nb_hw_voices_out = 1;
1820     }
1821
1822     if (s->nb_hw_voices_in <= 0) {
1823         dolog ("Bogus number of capture voices %d, setting to 0\n",
1824                s->nb_hw_voices_in);
1825         s->nb_hw_voices_in = 0;
1826     }
1827
1828     {
1829         int def;
1830         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1831     }
1832
1833     if (drvname) {
1834         int found = 0;
1835
1836         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1837             if (!strcmp (drvname, drvtab[i]->name)) {
1838                 done = !audio_driver_init (s, drvtab[i]);
1839                 found = 1;
1840                 break;
1841             }
1842         }
1843
1844         if (!found) {
1845             dolog ("Unknown audio driver `%s'\n", drvname);
1846             dolog ("Run with -audio-help to list available drivers\n");
1847         }
1848     }
1849
1850     if (!done) {
1851         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1852             if (drvtab[i]->can_be_default) {
1853                 done = !audio_driver_init (s, drvtab[i]);
1854             }
1855         }
1856     }
1857
1858     if (!done) {
1859         done = !audio_driver_init (s, &no_audio_driver);
1860         assert(done);
1861         dolog("warning: Using timer based audio emulation\n");
1862     }
1863
1864     if (conf.period.hertz <= 0) {
1865         if (conf.period.hertz < 0) {
1866             dolog ("warning: Timer period is negative - %d "
1867                    "treating as zero\n",
1868                    conf.period.hertz);
1869         }
1870         conf.period.ticks = 1;
1871     } else {
1872         conf.period.ticks =
1873             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1874     }
1875
1876     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1877     if (!e) {
1878         dolog ("warning: Could not register change state handler\n"
1879                "(Audio can continue looping even after stopping the VM)\n");
1880     }
1881
1882     QLIST_INIT (&s->card_head);
1883     vmstate_register (NULL, 0, &vmstate_audio, s);
1884 }
1885
1886 void AUD_register_card (const char *name, QEMUSoundCard *card)
1887 {
1888     audio_init ();
1889     card->name = g_strdup (name);
1890     memset (&card->entries, 0, sizeof (card->entries));
1891     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1892 }
1893
1894 void AUD_remove_card (QEMUSoundCard *card)
1895 {
1896     QLIST_REMOVE (card, entries);
1897     g_free (card->name);
1898 }
1899
1900
1901 CaptureVoiceOut *AUD_add_capture (
1902     struct audsettings *as,
1903     struct audio_capture_ops *ops,
1904     void *cb_opaque
1905     )
1906 {
1907     AudioState *s = &glob_audio_state;
1908     CaptureVoiceOut *cap;
1909     struct capture_callback *cb;
1910
1911     if (audio_validate_settings (as)) {
1912         dolog ("Invalid settings were passed when trying to add capture\n");
1913         audio_print_settings (as);
1914         goto err0;
1915     }
1916
1917     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1918     if (!cb) {
1919         dolog ("Could not allocate capture callback information, size %zu\n",
1920                sizeof (*cb));
1921         goto err0;
1922     }
1923     cb->ops = *ops;
1924     cb->opaque = cb_opaque;
1925
1926     cap = audio_pcm_capture_find_specific (as);
1927     if (cap) {
1928         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1929         return cap;
1930     }
1931     else {
1932         HWVoiceOut *hw;
1933         CaptureVoiceOut *cap;
1934
1935         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1936         if (!cap) {
1937             dolog ("Could not allocate capture voice, size %zu\n",
1938                    sizeof (*cap));
1939             goto err1;
1940         }
1941
1942         hw = &cap->hw;
1943         QLIST_INIT (&hw->sw_head);
1944         QLIST_INIT (&cap->cb_head);
1945
1946         /* XXX find a more elegant way */
1947         hw->samples = 4096 * 4;
1948         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1949                                     sizeof (struct st_sample));
1950         if (!hw->mix_buf) {
1951             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1952                    hw->samples);
1953             goto err2;
1954         }
1955
1956         audio_pcm_init_info (&hw->info, as);
1957
1958         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1959         if (!cap->buf) {
1960             dolog ("Could not allocate capture buffer "
1961                    "(%d samples, each %d bytes)\n",
1962                    hw->samples, 1 << hw->info.shift);
1963             goto err3;
1964         }
1965
1966         hw->clip = mixeng_clip
1967             [hw->info.nchannels == 2]
1968             [hw->info.sign]
1969             [hw->info.swap_endianness]
1970             [audio_bits_to_index (hw->info.bits)];
1971
1972         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1973         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1974
1975         hw = NULL;
1976         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1977             audio_attach_capture (hw);
1978         }
1979         return cap;
1980
1981     err3:
1982         g_free (cap->hw.mix_buf);
1983     err2:
1984         g_free (cap);
1985     err1:
1986         g_free (cb);
1987     err0:
1988         return NULL;
1989     }
1990 }
1991
1992 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1993 {
1994     struct capture_callback *cb;
1995
1996     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1997         if (cb->opaque == cb_opaque) {
1998             cb->ops.destroy (cb_opaque);
1999             QLIST_REMOVE (cb, entries);
2000             g_free (cb);
2001
2002             if (!cap->cb_head.lh_first) {
2003                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2004
2005                 while (sw) {
2006                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2007 #ifdef DEBUG_CAPTURE
2008                     dolog ("freeing %s\n", sw->name);
2009 #endif
2010
2011                     sw1 = sw->entries.le_next;
2012                     if (sw->rate) {
2013                         st_rate_stop (sw->rate);
2014                         sw->rate = NULL;
2015                     }
2016                     QLIST_REMOVE (sw, entries);
2017                     QLIST_REMOVE (sc, entries);
2018                     g_free (sc);
2019                     sw = sw1;
2020                 }
2021                 QLIST_REMOVE (cap, entries);
2022                 g_free (cap);
2023             }
2024             return;
2025         }
2026     }
2027 }
2028
2029 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2030 {
2031     if (sw) {
2032         HWVoiceOut *hw = sw->hw;
2033
2034         sw->vol.mute = mute;
2035         sw->vol.l = nominal_volume.l * lvol / 255;
2036         sw->vol.r = nominal_volume.r * rvol / 255;
2037
2038         if (hw->pcm_ops->ctl_out) {
2039             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2040         }
2041     }
2042 }
2043
2044 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2045 {
2046     if (sw) {
2047         HWVoiceIn *hw = sw->hw;
2048
2049         sw->vol.mute = mute;
2050         sw->vol.l = nominal_volume.l * lvol / 255;
2051         sw->vol.r = nominal_volume.r * rvol / 255;
2052
2053         if (hw->pcm_ops->ctl_in) {
2054             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2055         }
2056     }
2057 }