audio/audio.c

   1 /*
   2  * QEMU Audio subsystem
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw/hw.h"
  25 #include "audio.h"
  26 #include "monitor.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 #define AUDIO_CAP "audio"
  31 #include "audio_int.h"
  32
  33 /* #define DEBUG_PLIVE */
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37 /* #define DEBUG_POLL */
  38
  39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  40
  41
  42 /* Order of CONFIG_AUDIO_DRIVERS is import.
  43    The 1st one is the one used by default, that is the reason
  44     that we generate the list.
  45 */
  46 static struct audio_driver *drvtab[] = {
  47 #ifdef CONFIG_SPICE
  48     &spice_audio_driver,
  49 #endif
  50     CONFIG_AUDIO_DRIVERS
  51     &no_audio_driver,
  52     &wav_audio_driver
  53 };
  54
  55 struct fixed_settings {
  56     int enabled;
  57     int nb_voices;
  58     int greedy;
  59     struct audsettings settings;
  60 };
  61
  62 static struct {
  63     struct fixed_settings fixed_out;
  64     struct fixed_settings fixed_in;
  65     union {
  66         int hertz;
  67         int64_t ticks;
  68     } period;
  69     int plive;
  70     int log_to_monitor;
  71     int try_poll_in;
  72     int try_poll_out;
  73 } conf = {
  74     .fixed_out = { /* DAC fixed settings */
  75         .enabled = 1,
  76         .nb_voices = 1,
  77         .greedy = 1,
  78         .settings = {
  79             .freq = 44100,
  80             .nchannels = 2,
  81             .fmt = AUD_FMT_S16,
  82             .endianness =  AUDIO_HOST_ENDIANNESS,
  83         }
  84     },
  85
  86     .fixed_in = { /* ADC fixed settings */
  87         .enabled = 1,
  88         .nb_voices = 1,
  89         .greedy = 1,
  90         .settings = {
  91             .freq = 44100,
  92             .nchannels = 2,
  93             .fmt = AUD_FMT_S16,
  94             .endianness = AUDIO_HOST_ENDIANNESS,
  95         }
  96     },
  97
  98     .period = { .hertz = 250 },
  99     .plive = 0,
 100     .log_to_monitor = 0,
 101     .try_poll_in = 1,
 102     .try_poll_out = 1,
 103 };
 104
 105 static AudioState glob_audio_state;
 106
 107 const struct mixeng_volume nominal_volume = {
 108     .mute = 0,
 109 #ifdef FLOAT_MIXENG
 110     .r = 1.0,
 111     .l = 1.0,
 112 #else
 113     .r = 1ULL << 32,
 114     .l = 1ULL << 32,
 115 #endif
 116 };
 117
 118 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 119 #error No its not
 120 #else
 121 static void audio_print_options (const char *prefix,
 122                                  struct audio_option *opt);
 123
 124 int audio_bug (const char *funcname, int cond)
 125 {
 126     if (cond) {
 127         static int shown;
 128
 129         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 130         if (!shown) {
 131             struct audio_driver *d;
 132
 133             shown = 1;
 134             AUD_log (NULL, "Save all your work and restart without audio\n");
 135             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 136             AUD_log (NULL, "I am sorry\n");
 137             d = glob_audio_state.drv;
 138             if (d) {
 139                 audio_print_options (d->name, d->options);
 140             }
 141         }
 142         AUD_log (NULL, "Context:\n");
 143
 144 #if defined AUDIO_BREAKPOINT_ON_BUG
 145 #  if defined HOST_I386
 146 #    if defined __GNUC__
 147         __asm__ ("int3");
 148 #    elif defined _MSC_VER
 149         _asm _emit 0xcc;
 150 #    else
 151         abort ();
 152 #    endif
 153 #  else
 154         abort ();
 155 #  endif
 156 #endif
 157     }
 158
 159     return cond;
 160 }
 161 #endif
 162
 163 static inline int audio_bits_to_index (int bits)
 164 {
 165     switch (bits) {
 166     case 8:
 167         return 0;
 168
 169     case 16:
 170         return 1;
 171
 172     case 32:
 173         return 2;
 174
 175     default:
 176         audio_bug ("bits_to_index", 1);
 177         AUD_log (NULL, "invalid bits %d\n", bits);
 178         return 0;
 179     }
 180 }
 181
 182 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 183 {
 184     int cond;
 185     size_t len;
 186
 187     len = nmemb * size;
 188     cond = !nmemb || !size;
 189     cond |= nmemb < 0;
 190     cond |= len < size;
 191
 192     if (audio_bug ("audio_calloc", cond)) {
 193         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 194                  funcname);
 195         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 196         return NULL;
 197     }
 198
 199     return g_malloc0 (len);
 200 }
 201
 202 static char *audio_alloc_prefix (const char *s)
 203 {
 204     const char qemu_prefix[] = "QEMU_";
 205     size_t len, i;
 206     char *r, *u;
 207
 208     if (!s) {
 209         return NULL;
 210     }
 211
 212     len = strlen (s);
 213     r = g_malloc (len + sizeof (qemu_prefix));
 214
 215     u = r + sizeof (qemu_prefix) - 1;
 216
 217     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 218     pstrcat (r, len + sizeof (qemu_prefix), s);
 219
 220     for (i = 0; i < len; ++i) {
 221         u[i] = qemu_toupper(u[i]);
 222     }
 223
 224     return r;
 225 }
 226
 227 static const char *audio_audfmt_to_string (audfmt_e fmt)
 228 {
 229     switch (fmt) {
 230     case AUD_FMT_U8:
 231         return "U8";
 232
 233     case AUD_FMT_U16:
 234         return "U16";
 235
 236     case AUD_FMT_S8:
 237         return "S8";
 238
 239     case AUD_FMT_S16:
 240         return "S16";
 241
 242     case AUD_FMT_U32:
 243         return "U32";
 244
 245     case AUD_FMT_S32:
 246         return "S32";
 247     }
 248
 249     dolog ("Bogus audfmt %d returning S16\n", fmt);
 250     return "S16";
 251 }
 252
 253 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 254                                         int *defaultp)
 255 {
 256     if (!strcasecmp (s, "u8")) {
 257         *defaultp = 0;
 258         return AUD_FMT_U8;
 259     }
 260     else if (!strcasecmp (s, "u16")) {
 261         *defaultp = 0;
 262         return AUD_FMT_U16;
 263     }
 264     else if (!strcasecmp (s, "u32")) {
 265         *defaultp = 0;
 266         return AUD_FMT_U32;
 267     }
 268     else if (!strcasecmp (s, "s8")) {
 269         *defaultp = 0;
 270         return AUD_FMT_S8;
 271     }
 272     else if (!strcasecmp (s, "s16")) {
 273         *defaultp = 0;
 274         return AUD_FMT_S16;
 275     }
 276     else if (!strcasecmp (s, "s32")) {
 277         *defaultp = 0;
 278         return AUD_FMT_S32;
 279     }
 280     else {
 281         dolog ("Bogus audio format `%s' using %s\n",
 282                s, audio_audfmt_to_string (defval));
 283         *defaultp = 1;
 284         return defval;
 285     }
 286 }
 287
 288 static audfmt_e audio_get_conf_fmt (const char *envname,
 289                                     audfmt_e defval,
 290                                     int *defaultp)
 291 {
 292     const char *var = getenv (envname);
 293     if (!var) {
 294         *defaultp = 1;
 295         return defval;
 296     }
 297     return audio_string_to_audfmt (var, defval, defaultp);
 298 }
 299
 300 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 301 {
 302     int val;
 303     char *strval;
 304
 305     strval = getenv (key);
 306     if (strval) {
 307         *defaultp = 0;
 308         val = atoi (strval);
 309         return val;
 310     }
 311     else {
 312         *defaultp = 1;
 313         return defval;
 314     }
 315 }
 316
 317 static const char *audio_get_conf_str (const char *key,
 318                                        const char *defval,
 319                                        int *defaultp)
 320 {
 321     const char *val = getenv (key);
 322     if (!val) {
 323         *defaultp = 1;
 324         return defval;
 325     }
 326     else {
 327         *defaultp = 0;
 328         return val;
 329     }
 330 }
 331
 332 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 333 {
 334     if (conf.log_to_monitor) {
 335         if (cap) {
 336             monitor_printf(default_mon, "%s: ", cap);
 337         }
 338
 339         monitor_vprintf(default_mon, fmt, ap);
 340     }
 341     else {
 342         if (cap) {
 343             fprintf (stderr, "%s: ", cap);
 344         }
 345
 346         vfprintf (stderr, fmt, ap);
 347     }
 348 }
 349
 350 void AUD_log (const char *cap, const char *fmt, ...)
 351 {
 352     va_list ap;
 353
 354     va_start (ap, fmt);
 355     AUD_vlog (cap, fmt, ap);
 356     va_end (ap);
 357 }
 358
 359 static void audio_print_options (const char *prefix,
 360                                  struct audio_option *opt)
 361 {
 362     char *uprefix;
 363
 364     if (!prefix) {
 365         dolog ("No prefix specified\n");
 366         return;
 367     }
 368
 369     if (!opt) {
 370         dolog ("No options\n");
 371         return;
 372     }
 373
 374     uprefix = audio_alloc_prefix (prefix);
 375
 376     for (; opt->name; opt++) {
 377         const char *state = "default";
 378         printf ("  %s_%s: ", uprefix, opt->name);
 379
 380         if (opt->overriddenp && *opt->overriddenp) {
 381             state = "current";
 382         }
 383
 384         switch (opt->tag) {
 385         case AUD_OPT_BOOL:
 386             {
 387                 int *intp = opt->valp;
 388                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 389             }
 390             break;
 391
 392         case AUD_OPT_INT:
 393             {
 394                 int *intp = opt->valp;
 395                 printf ("integer, %s = %d\n", state, *intp);
 396             }
 397             break;
 398
 399         case AUD_OPT_FMT:
 400             {
 401                 audfmt_e *fmtp = opt->valp;
 402                 printf (
 403                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 404                     state,
 405                     audio_audfmt_to_string (*fmtp)
 406                     );
 407             }
 408             break;
 409
 410         case AUD_OPT_STR:
 411             {
 412                 const char **strp = opt->valp;
 413                 printf ("string, %s = %s\n",
 414                         state,
 415                         *strp ? *strp : "(not set)");
 416             }
 417             break;
 418
 419         default:
 420             printf ("???\n");
 421             dolog ("Bad value tag for option %s_%s %d\n",
 422                    uprefix, opt->name, opt->tag);
 423             break;
 424         }
 425         printf ("    %s\n", opt->descr);
 426     }
 427
 428     g_free (uprefix);
 429 }
 430
 431 static void audio_process_options (const char *prefix,
 432                                    struct audio_option *opt)
 433 {
 434     char *optname;
 435     const char qemu_prefix[] = "QEMU_";
 436     size_t preflen, optlen;
 437
 438     if (audio_bug (AUDIO_FUNC, !prefix)) {
 439         dolog ("prefix = NULL\n");
 440         return;
 441     }
 442
 443     if (audio_bug (AUDIO_FUNC, !opt)) {
 444         dolog ("opt = NULL\n");
 445         return;
 446     }
 447
 448     preflen = strlen (prefix);
 449
 450     for (; opt->name; opt++) {
 451         size_t len, i;
 452         int def;
 453
 454         if (!opt->valp) {
 455             dolog ("Option value pointer for `%s' is not set\n",
 456                    opt->name);
 457             continue;
 458         }
 459
 460         len = strlen (opt->name);
 461         /* len of opt->name + len of prefix + size of qemu_prefix
 462          * (includes trailing zero) + zero + underscore (on behalf of
 463          * sizeof) */
 464         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 465         optname = g_malloc (optlen);
 466
 467         pstrcpy (optname, optlen, qemu_prefix);
 468
 469         /* copy while upper-casing, including trailing zero */
 470         for (i = 0; i <= preflen; ++i) {
 471             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 472         }
 473         pstrcat (optname, optlen, "_");
 474         pstrcat (optname, optlen, opt->name);
 475
 476         def = 1;
 477         switch (opt->tag) {
 478         case AUD_OPT_BOOL:
 479         case AUD_OPT_INT:
 480             {
 481                 int *intp = opt->valp;
 482                 *intp = audio_get_conf_int (optname, *intp, &def);
 483             }
 484             break;
 485
 486         case AUD_OPT_FMT:
 487             {
 488                 audfmt_e *fmtp = opt->valp;
 489                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 490             }
 491             break;
 492
 493         case AUD_OPT_STR:
 494             {
 495                 const char **strp = opt->valp;
 496                 *strp = audio_get_conf_str (optname, *strp, &def);
 497             }
 498             break;
 499
 500         default:
 501             dolog ("Bad value tag for option `%s' - %d\n",
 502                    optname, opt->tag);
 503             break;
 504         }
 505
 506         if (!opt->overriddenp) {
 507             opt->overriddenp = &opt->overridden;
 508         }
 509         *opt->overriddenp = !def;
 510         g_free (optname);
 511     }
 512 }
 513
 514 static void audio_print_settings (struct audsettings *as)
 515 {
 516     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 517
 518     switch (as->fmt) {
 519     case AUD_FMT_S8:
 520         AUD_log (NULL, "S8");
 521         break;
 522     case AUD_FMT_U8:
 523         AUD_log (NULL, "U8");
 524         break;
 525     case AUD_FMT_S16:
 526         AUD_log (NULL, "S16");
 527         break;
 528     case AUD_FMT_U16:
 529         AUD_log (NULL, "U16");
 530         break;
 531     case AUD_FMT_S32:
 532         AUD_log (NULL, "S32");
 533         break;
 534     case AUD_FMT_U32:
 535         AUD_log (NULL, "U32");
 536         break;
 537     default:
 538         AUD_log (NULL, "invalid(%d)", as->fmt);
 539         break;
 540     }
 541
 542     AUD_log (NULL, " endianness=");
 543     switch (as->endianness) {
 544     case 0:
 545         AUD_log (NULL, "little");
 546         break;
 547     case 1:
 548         AUD_log (NULL, "big");
 549         break;
 550     default:
 551         AUD_log (NULL, "invalid");
 552         break;
 553     }
 554     AUD_log (NULL, "\n");
 555 }
 556
 557 static int audio_validate_settings (struct audsettings *as)
 558 {
 559     int invalid;
 560
 561     invalid = as->nchannels != 1 && as->nchannels != 2;
 562     invalid |= as->endianness != 0 && as->endianness != 1;
 563
 564     switch (as->fmt) {
 565     case AUD_FMT_S8:
 566     case AUD_FMT_U8:
 567     case AUD_FMT_S16:
 568     case AUD_FMT_U16:
 569     case AUD_FMT_S32:
 570     case AUD_FMT_U32:
 571         break;
 572     default:
 573         invalid = 1;
 574         break;
 575     }
 576
 577     invalid |= as->freq <= 0;
 578     return invalid ? -1 : 0;
 579 }
 580
 581 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 582 {
 583     int bits = 8, sign = 0;
 584
 585     switch (as->fmt) {
 586     case AUD_FMT_S8:
 587         sign = 1;
 588         /* fall through */
 589     case AUD_FMT_U8:
 590         break;
 591
 592     case AUD_FMT_S16:
 593         sign = 1;
 594         /* fall through */
 595     case AUD_FMT_U16:
 596         bits = 16;
 597         break;
 598
 599     case AUD_FMT_S32:
 600         sign = 1;
 601         /* fall through */
 602     case AUD_FMT_U32:
 603         bits = 32;
 604         break;
 605     }
 606     return info->freq == as->freq
 607         && info->nchannels == as->nchannels
 608         && info->sign == sign
 609         && info->bits == bits
 610         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 611 }
 612
 613 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 614 {
 615     int bits = 8, sign = 0, shift = 0;
 616
 617     switch (as->fmt) {
 618     case AUD_FMT_S8:
 619         sign = 1;
 620     case AUD_FMT_U8:
 621         break;
 622
 623     case AUD_FMT_S16:
 624         sign = 1;
 625     case AUD_FMT_U16:
 626         bits = 16;
 627         shift = 1;
 628         break;
 629
 630     case AUD_FMT_S32:
 631         sign = 1;
 632     case AUD_FMT_U32:
 633         bits = 32;
 634         shift = 2;
 635         break;
 636     }
 637
 638     info->freq = as->freq;
 639     info->bits = bits;
 640     info->sign = sign;
 641     info->nchannels = as->nchannels;
 642     info->shift = (as->nchannels == 2) + shift;
 643     info->align = (1 << info->shift) - 1;
 644     info->bytes_per_second = info->freq << info->shift;
 645     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 646 }
 647
 648 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 649 {
 650     if (!len) {
 651         return;
 652     }
 653
 654     if (info->sign) {
 655         memset (buf, 0x00, len << info->shift);
 656     }
 657     else {
 658         switch (info->bits) {
 659         case 8:
 660             memset (buf, 0x80, len << info->shift);
 661             break;
 662
 663         case 16:
 664             {
 665                 int i;
 666                 uint16_t *p = buf;
 667                 int shift = info->nchannels - 1;
 668                 short s = INT16_MAX;
 669
 670                 if (info->swap_endianness) {
 671                     s = bswap16 (s);
 672                 }
 673
 674                 for (i = 0; i < len << shift; i++) {
 675                     p[i] = s;
 676                 }
 677             }
 678             break;
 679
 680         case 32:
 681             {
 682                 int i;
 683                 uint32_t *p = buf;
 684                 int shift = info->nchannels - 1;
 685                 int32_t s = INT32_MAX;
 686
 687                 if (info->swap_endianness) {
 688                     s = bswap32 (s);
 689                 }
 690
 691                 for (i = 0; i < len << shift; i++) {
 692                     p[i] = s;
 693                 }
 694             }
 695             break;
 696
 697         default:
 698             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 699                      info->bits);
 700             break;
 701         }
 702     }
 703 }
 704
 705 /*
 706  * Capture
 707  */
 708 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 709 {
 710     (void) src;
 711     (void) dst;
 712     (void) samples;
 713 }
 714
 715 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 716     struct audsettings *as
 717     )
 718 {
 719     CaptureVoiceOut *cap;
 720     AudioState *s = &glob_audio_state;
 721
 722     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 723         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 724             return cap;
 725         }
 726     }
 727     return NULL;
 728 }
 729
 730 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 731 {
 732     struct capture_callback *cb;
 733
 734 #ifdef DEBUG_CAPTURE
 735     dolog ("notification %d sent\n", cmd);
 736 #endif
 737     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 738         cb->ops.notify (cb->opaque, cmd);
 739     }
 740 }
 741
 742 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 743 {
 744     if (cap->hw.enabled != enabled) {
 745         audcnotification_e cmd;
 746         cap->hw.enabled = enabled;
 747         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 748         audio_notify_capture (cap, cmd);
 749     }
 750 }
 751
 752 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 753 {
 754     HWVoiceOut *hw = &cap->hw;
 755     SWVoiceOut *sw;
 756     int enabled = 0;
 757
 758     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 759         if (sw->active) {
 760             enabled = 1;
 761             break;
 762         }
 763     }
 764     audio_capture_maybe_changed (cap, enabled);
 765 }
 766
 767 static void audio_detach_capture (HWVoiceOut *hw)
 768 {
 769     SWVoiceCap *sc = hw->cap_head.lh_first;
 770
 771     while (sc) {
 772         SWVoiceCap *sc1 = sc->entries.le_next;
 773         SWVoiceOut *sw = &sc->sw;
 774         CaptureVoiceOut *cap = sc->cap;
 775         int was_active = sw->active;
 776
 777         if (sw->rate) {
 778             st_rate_stop (sw->rate);
 779             sw->rate = NULL;
 780         }
 781
 782         QLIST_REMOVE (sw, entries);
 783         QLIST_REMOVE (sc, entries);
 784         g_free (sc);
 785         if (was_active) {
 786             /* We have removed soft voice from the capture:
 787                this might have changed the overall status of the capture
 788                since this might have been the only active voice */
 789             audio_recalc_and_notify_capture (cap);
 790         }
 791         sc = sc1;
 792     }
 793 }
 794
 795 static int audio_attach_capture (HWVoiceOut *hw)
 796 {
 797     AudioState *s = &glob_audio_state;
 798     CaptureVoiceOut *cap;
 799
 800     audio_detach_capture (hw);
 801     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 802         SWVoiceCap *sc;
 803         SWVoiceOut *sw;
 804         HWVoiceOut *hw_cap = &cap->hw;
 805
 806         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 807         if (!sc) {
 808             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 809                    sizeof (*sc));
 810             return -1;
 811         }
 812
 813         sc->cap = cap;
 814         sw = &sc->sw;
 815         sw->hw = hw_cap;
 816         sw->info = hw->info;
 817         sw->empty = 1;
 818         sw->active = hw->enabled;
 819         sw->conv = noop_conv;
 820         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 821         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 822         if (!sw->rate) {
 823             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 824             g_free (sw);
 825             return -1;
 826         }
 827         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 828         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 829 #ifdef DEBUG_CAPTURE
 830         asprintf (&sw->name, "for %p %d,%d,%d",
 831                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 832         dolog ("Added %s active = %d\n", sw->name, sw->active);
 833 #endif
 834         if (sw->active) {
 835             audio_capture_maybe_changed (cap, 1);
 836         }
 837     }
 838     return 0;
 839 }
 840
 841 /*
 842  * Hard voice (capture)
 843  */
 844 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 845 {
 846     SWVoiceIn *sw;
 847     int m = hw->total_samples_captured;
 848
 849     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 850         if (sw->active) {
 851             m = audio_MIN (m, sw->total_hw_samples_acquired);
 852         }
 853     }
 854     return m;
 855 }
 856
 857 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 858 {
 859     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 860     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 861         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 862         return 0;
 863     }
 864     return live;
 865 }
 866
 867 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 868                            int live, int pending)
 869 {
 870     int left = hw->samples - pending;
 871     int len = audio_MIN (left, live);
 872     int clipped = 0;
 873
 874     while (len) {
 875         struct st_sample *src = hw->mix_buf + hw->rpos;
 876         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 877         int samples_till_end_of_buf = hw->samples - hw->rpos;
 878         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 879
 880         hw->clip (dst, src, samples_to_clip);
 881
 882         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 883         len -= samples_to_clip;
 884         clipped += samples_to_clip;
 885     }
 886     return clipped;
 887 }
 888
 889 /*
 890  * Soft voice (capture)
 891  */
 892 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 893 {
 894     HWVoiceIn *hw = sw->hw;
 895     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 896     int rpos;
 897
 898     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 899         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 900         return 0;
 901     }
 902
 903     rpos = hw->wpos - live;
 904     if (rpos >= 0) {
 905         return rpos;
 906     }
 907     else {
 908         return hw->samples + rpos;
 909     }
 910 }
 911
 912 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 913 {
 914     HWVoiceIn *hw = sw->hw;
 915     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 916     struct st_sample *src, *dst = sw->buf;
 917
 918     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 919
 920     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 921     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 922         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 923         return 0;
 924     }
 925
 926     samples = size >> sw->info.shift;
 927     if (!live) {
 928         return 0;
 929     }
 930
 931     swlim = (live * sw->ratio) >> 32;
 932     swlim = audio_MIN (swlim, samples);
 933
 934     while (swlim) {
 935         src = hw->conv_buf + rpos;
 936         isamp = hw->wpos - rpos;
 937         /* XXX: <= ? */
 938         if (isamp <= 0) {
 939             isamp = hw->samples - rpos;
 940         }
 941
 942         if (!isamp) {
 943             break;
 944         }
 945         osamp = swlim;
 946
 947         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 948             dolog ("osamp=%d\n", osamp);
 949             return 0;
 950         }
 951
 952         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 953         swlim -= osamp;
 954         rpos = (rpos + isamp) % hw->samples;
 955         dst += osamp;
 956         ret += osamp;
 957         total += isamp;
 958     }
 959
 960     mixeng_volume (sw->buf, ret, &sw->vol);
 961
 962     sw->clip (buf, sw->buf, ret);
 963     sw->total_hw_samples_acquired += total;
 964     return ret << sw->info.shift;
 965 }
 966
 967 /*
 968  * Hard voice (playback)
 969  */
 970 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 971 {
 972     SWVoiceOut *sw;
 973     int m = INT_MAX;
 974     int nb_live = 0;
 975
 976     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 977         if (sw->active || !sw->empty) {
 978             m = audio_MIN (m, sw->total_hw_samples_mixed);
 979             nb_live += 1;
 980         }
 981     }
 982
 983     *nb_livep = nb_live;
 984     return m;
 985 }
 986
 987 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 988 {
 989     int smin;
 990     int nb_live1;
 991
 992     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 993     if (nb_live) {
 994         *nb_live = nb_live1;
 995     }
 996
 997     if (nb_live1) {
 998         int live = smin;
 999
1000         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1001             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1002             return 0;
1003         }
1004         return live;
1005     }
1006     return 0;
1007 }
1008
1009 /*
1010  * Soft voice (playback)
1011  */
1012 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1013 {
1014     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1015     int ret = 0, pos = 0, total = 0;
1016
1017     if (!sw) {
1018         return size;
1019     }
1020
1021     hwsamples = sw->hw->samples;
1022
1023     live = sw->total_hw_samples_mixed;
1024     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1025         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1026         return 0;
1027     }
1028
1029     if (live == hwsamples) {
1030 #ifdef DEBUG_OUT
1031         dolog ("%s is full %d\n", sw->name, live);
1032 #endif
1033         return 0;
1034     }
1035
1036     wpos = (sw->hw->rpos + live) % hwsamples;
1037     samples = size >> sw->info.shift;
1038
1039     dead = hwsamples - live;
1040     swlim = ((int64_t) dead << 32) / sw->ratio;
1041     swlim = audio_MIN (swlim, samples);
1042     if (swlim) {
1043         sw->conv (sw->buf, buf, swlim);
1044         mixeng_volume (sw->buf, swlim, &sw->vol);
1045     }
1046
1047     while (swlim) {
1048         dead = hwsamples - live;
1049         left = hwsamples - wpos;
1050         blck = audio_MIN (dead, left);
1051         if (!blck) {
1052             break;
1053         }
1054         isamp = swlim;
1055         osamp = blck;
1056         st_rate_flow_mix (
1057             sw->rate,
1058             sw->buf + pos,
1059             sw->hw->mix_buf + wpos,
1060             &isamp,
1061             &osamp
1062             );
1063         ret += isamp;
1064         swlim -= isamp;
1065         pos += isamp;
1066         live += osamp;
1067         wpos = (wpos + osamp) % hwsamples;
1068         total += osamp;
1069     }
1070
1071     sw->total_hw_samples_mixed += total;
1072     sw->empty = sw->total_hw_samples_mixed == 0;
1073
1074 #ifdef DEBUG_OUT
1075     dolog (
1076         "%s: write size %d ret %d total sw %d\n",
1077         SW_NAME (sw),
1078         size >> sw->info.shift,
1079         ret,
1080         sw->total_hw_samples_mixed
1081         );
1082 #endif
1083
1084     return ret << sw->info.shift;
1085 }
1086
1087 #ifdef DEBUG_AUDIO
1088 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1089 {
1090     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1091            cap, info->bits, info->sign, info->freq, info->nchannels);
1092 }
1093 #endif
1094
1095 #define DAC
1096 #include "audio_template.h"
1097 #undef DAC
1098 #include "audio_template.h"
1099
1100 /*
1101  * Timer
1102  */
1103 static int audio_is_timer_needed (void)
1104 {
1105     HWVoiceIn *hwi = NULL;
1106     HWVoiceOut *hwo = NULL;
1107
1108     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1109         if (!hwo->poll_mode) return 1;
1110     }
1111     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1112         if (!hwi->poll_mode) return 1;
1113     }
1114     return 0;
1115 }
1116
1117 static void audio_reset_timer (AudioState *s)
1118 {
1119     if (audio_is_timer_needed ()) {
1120         qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1121     }
1122     else {
1123         qemu_del_timer (s->ts);
1124     }
1125 }
1126
1127 static void audio_timer (void *opaque)
1128 {
1129     audio_run ("timer");
1130     audio_reset_timer (opaque);
1131 }
1132
1133 /*
1134  * Public API
1135  */
1136 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1137 {
1138     int bytes;
1139
1140     if (!sw) {
1141         /* XXX: Consider options */
1142         return size;
1143     }
1144
1145     if (!sw->hw->enabled) {
1146         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1147         return 0;
1148     }
1149
1150     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1151     return bytes;
1152 }
1153
1154 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1155 {
1156     int bytes;
1157
1158     if (!sw) {
1159         /* XXX: Consider options */
1160         return size;
1161     }
1162
1163     if (!sw->hw->enabled) {
1164         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1165         return 0;
1166     }
1167
1168     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1169     return bytes;
1170 }
1171
1172 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1173 {
1174     return sw->hw->samples << sw->hw->info.shift;
1175 }
1176
1177 void AUD_set_active_out (SWVoiceOut *sw, int on)
1178 {
1179     HWVoiceOut *hw;
1180
1181     if (!sw) {
1182         return;
1183     }
1184
1185     hw = sw->hw;
1186     if (sw->active != on) {
1187         AudioState *s = &glob_audio_state;
1188         SWVoiceOut *temp_sw;
1189         SWVoiceCap *sc;
1190
1191         if (on) {
1192             hw->pending_disable = 0;
1193             if (!hw->enabled) {
1194                 hw->enabled = 1;
1195                 if (s->vm_running) {
1196                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1197                     audio_reset_timer (s);
1198                 }
1199             }
1200         }
1201         else {
1202             if (hw->enabled) {
1203                 int nb_active = 0;
1204
1205                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1206                      temp_sw = temp_sw->entries.le_next) {
1207                     nb_active += temp_sw->active != 0;
1208                 }
1209
1210                 hw->pending_disable = nb_active == 1;
1211             }
1212         }
1213
1214         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1215             sc->sw.active = hw->enabled;
1216             if (hw->enabled) {
1217                 audio_capture_maybe_changed (sc->cap, 1);
1218             }
1219         }
1220         sw->active = on;
1221     }
1222 }
1223
1224 void AUD_set_active_in (SWVoiceIn *sw, int on)
1225 {
1226     HWVoiceIn *hw;
1227
1228     if (!sw) {
1229         return;
1230     }
1231
1232     hw = sw->hw;
1233     if (sw->active != on) {
1234         AudioState *s = &glob_audio_state;
1235         SWVoiceIn *temp_sw;
1236
1237         if (on) {
1238             if (!hw->enabled) {
1239                 hw->enabled = 1;
1240                 if (s->vm_running) {
1241                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1242                     audio_reset_timer (s);
1243                 }
1244             }
1245             sw->total_hw_samples_acquired = hw->total_samples_captured;
1246         }
1247         else {
1248             if (hw->enabled) {
1249                 int nb_active = 0;
1250
1251                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1252                      temp_sw = temp_sw->entries.le_next) {
1253                     nb_active += temp_sw->active != 0;
1254                 }
1255
1256                 if (nb_active == 1) {
1257                     hw->enabled = 0;
1258                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1259                 }
1260             }
1261         }
1262         sw->active = on;
1263     }
1264 }
1265
1266 static int audio_get_avail (SWVoiceIn *sw)
1267 {
1268     int live;
1269
1270     if (!sw) {
1271         return 0;
1272     }
1273
1274     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1275     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1276         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1277         return 0;
1278     }
1279
1280     ldebug (
1281         "%s: get_avail live %d ret %" PRId64 "\n",
1282         SW_NAME (sw),
1283         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1284         );
1285
1286     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1287 }
1288
1289 static int audio_get_free (SWVoiceOut *sw)
1290 {
1291     int live, dead;
1292
1293     if (!sw) {
1294         return 0;
1295     }
1296
1297     live = sw->total_hw_samples_mixed;
1298
1299     if (audio_bug (AUDIO_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     dead = sw->hw->samples - live;
1305
1306 #ifdef DEBUG_OUT
1307     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1308            SW_NAME (sw),
1309            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1310 #endif
1311
1312     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1313 }
1314
1315 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1316 {
1317     int n;
1318
1319     if (hw->enabled) {
1320         SWVoiceCap *sc;
1321
1322         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1323             SWVoiceOut *sw = &sc->sw;
1324             int rpos2 = rpos;
1325
1326             n = samples;
1327             while (n) {
1328                 int till_end_of_hw = hw->samples - rpos2;
1329                 int to_write = audio_MIN (till_end_of_hw, n);
1330                 int bytes = to_write << hw->info.shift;
1331                 int written;
1332
1333                 sw->buf = hw->mix_buf + rpos2;
1334                 written = audio_pcm_sw_write (sw, NULL, bytes);
1335                 if (written - bytes) {
1336                     dolog ("Could not mix %d bytes into a capture "
1337                            "buffer, mixed %d\n",
1338                            bytes, written);
1339                     break;
1340                 }
1341                 n -= to_write;
1342                 rpos2 = (rpos2 + to_write) % hw->samples;
1343             }
1344         }
1345     }
1346
1347     n = audio_MIN (samples, hw->samples - rpos);
1348     mixeng_clear (hw->mix_buf + rpos, n);
1349     mixeng_clear (hw->mix_buf, samples - n);
1350 }
1351
1352 static void audio_run_out (AudioState *s)
1353 {
1354     HWVoiceOut *hw = NULL;
1355     SWVoiceOut *sw;
1356
1357     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1358         int played;
1359         int live, free, nb_live, cleanup_required, prev_rpos;
1360
1361         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1362         if (!nb_live) {
1363             live = 0;
1364         }
1365
1366         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1367             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1368             continue;
1369         }
1370
1371         if (hw->pending_disable && !nb_live) {
1372             SWVoiceCap *sc;
1373 #ifdef DEBUG_OUT
1374             dolog ("Disabling voice\n");
1375 #endif
1376             hw->enabled = 0;
1377             hw->pending_disable = 0;
1378             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1379             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1380                 sc->sw.active = 0;
1381                 audio_recalc_and_notify_capture (sc->cap);
1382             }
1383             continue;
1384         }
1385
1386         if (!live) {
1387             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1388                 if (sw->active) {
1389                     free = audio_get_free (sw);
1390                     if (free > 0) {
1391                         sw->callback.fn (sw->callback.opaque, free);
1392                     }
1393                 }
1394             }
1395             continue;
1396         }
1397
1398         prev_rpos = hw->rpos;
1399         played = hw->pcm_ops->run_out (hw, live);
1400         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1401             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1402                    hw->rpos, hw->samples, played);
1403             hw->rpos = 0;
1404         }
1405
1406 #ifdef DEBUG_OUT
1407         dolog ("played=%d\n", played);
1408 #endif
1409
1410         if (played) {
1411             hw->ts_helper += played;
1412             audio_capture_mix_and_clear (hw, prev_rpos, played);
1413         }
1414
1415         cleanup_required = 0;
1416         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1417             if (!sw->active && sw->empty) {
1418                 continue;
1419             }
1420
1421             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1422                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1423                        played, sw->total_hw_samples_mixed);
1424                 played = sw->total_hw_samples_mixed;
1425             }
1426
1427             sw->total_hw_samples_mixed -= played;
1428
1429             if (!sw->total_hw_samples_mixed) {
1430                 sw->empty = 1;
1431                 cleanup_required |= !sw->active && !sw->callback.fn;
1432             }
1433
1434             if (sw->active) {
1435                 free = audio_get_free (sw);
1436                 if (free > 0) {
1437                     sw->callback.fn (sw->callback.opaque, free);
1438                 }
1439             }
1440         }
1441
1442         if (cleanup_required) {
1443             SWVoiceOut *sw1;
1444
1445             sw = hw->sw_head.lh_first;
1446             while (sw) {
1447                 sw1 = sw->entries.le_next;
1448                 if (!sw->active && !sw->callback.fn) {
1449 #ifdef DEBUG_PLIVE
1450                     dolog ("Finishing with old voice\n");
1451 #endif
1452                     audio_close_out (sw);
1453                 }
1454                 sw = sw1;
1455             }
1456         }
1457     }
1458 }
1459
1460 static void audio_run_in (AudioState *s)
1461 {
1462     HWVoiceIn *hw = NULL;
1463
1464     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1465         SWVoiceIn *sw;
1466         int captured, min;
1467
1468         captured = hw->pcm_ops->run_in (hw);
1469
1470         min = audio_pcm_hw_find_min_in (hw);
1471         hw->total_samples_captured += captured - min;
1472         hw->ts_helper += captured;
1473
1474         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1475             sw->total_hw_samples_acquired -= min;
1476
1477             if (sw->active) {
1478                 int avail;
1479
1480                 avail = audio_get_avail (sw);
1481                 if (avail > 0) {
1482                     sw->callback.fn (sw->callback.opaque, avail);
1483                 }
1484             }
1485         }
1486     }
1487 }
1488
1489 static void audio_run_capture (AudioState *s)
1490 {
1491     CaptureVoiceOut *cap;
1492
1493     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1494         int live, rpos, captured;
1495         HWVoiceOut *hw = &cap->hw;
1496         SWVoiceOut *sw;
1497
1498         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1499         rpos = hw->rpos;
1500         while (live) {
1501             int left = hw->samples - rpos;
1502             int to_capture = audio_MIN (live, left);
1503             struct st_sample *src;
1504             struct capture_callback *cb;
1505
1506             src = hw->mix_buf + rpos;
1507             hw->clip (cap->buf, src, to_capture);
1508             mixeng_clear (src, to_capture);
1509
1510             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1511                 cb->ops.capture (cb->opaque, cap->buf,
1512                                  to_capture << hw->info.shift);
1513             }
1514             rpos = (rpos + to_capture) % hw->samples;
1515             live -= to_capture;
1516         }
1517         hw->rpos = rpos;
1518
1519         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1520             if (!sw->active && sw->empty) {
1521                 continue;
1522             }
1523
1524             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1525                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1526                        captured, sw->total_hw_samples_mixed);
1527                 captured = sw->total_hw_samples_mixed;
1528             }
1529
1530             sw->total_hw_samples_mixed -= captured;
1531             sw->empty = sw->total_hw_samples_mixed == 0;
1532         }
1533     }
1534 }
1535
1536 void audio_run (const char *msg)
1537 {
1538     AudioState *s = &glob_audio_state;
1539
1540     audio_run_out (s);
1541     audio_run_in (s);
1542     audio_run_capture (s);
1543 #ifdef DEBUG_POLL
1544     {
1545         static double prevtime;
1546         double currtime;
1547         struct timeval tv;
1548
1549         if (gettimeofday (&tv, NULL)) {
1550             perror ("audio_run: gettimeofday");
1551             return;
1552         }
1553
1554         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1555         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1556         prevtime = currtime;
1557     }
1558 #endif
1559 }
1560
1561 static struct audio_option audio_options[] = {
1562     /* DAC */
1563     {
1564         .name  = "DAC_FIXED_SETTINGS",
1565         .tag   = AUD_OPT_BOOL,
1566         .valp  = &conf.fixed_out.enabled,
1567         .descr = "Use fixed settings for host DAC"
1568     },
1569     {
1570         .name  = "DAC_FIXED_FREQ",
1571         .tag   = AUD_OPT_INT,
1572         .valp  = &conf.fixed_out.settings.freq,
1573         .descr = "Frequency for fixed host DAC"
1574     },
1575     {
1576         .name  = "DAC_FIXED_FMT",
1577         .tag   = AUD_OPT_FMT,
1578         .valp  = &conf.fixed_out.settings.fmt,
1579         .descr = "Format for fixed host DAC"
1580     },
1581     {
1582         .name  = "DAC_FIXED_CHANNELS",
1583         .tag   = AUD_OPT_INT,
1584         .valp  = &conf.fixed_out.settings.nchannels,
1585         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1586     },
1587     {
1588         .name  = "DAC_VOICES",
1589         .tag   = AUD_OPT_INT,
1590         .valp  = &conf.fixed_out.nb_voices,
1591         .descr = "Number of voices for DAC"
1592     },
1593     {
1594         .name  = "DAC_TRY_POLL",
1595         .tag   = AUD_OPT_BOOL,
1596         .valp  = &conf.try_poll_out,
1597         .descr = "Attempt using poll mode for DAC"
1598     },
1599     /* ADC */
1600     {
1601         .name  = "ADC_FIXED_SETTINGS",
1602         .tag   = AUD_OPT_BOOL,
1603         .valp  = &conf.fixed_in.enabled,
1604         .descr = "Use fixed settings for host ADC"
1605     },
1606     {
1607         .name  = "ADC_FIXED_FREQ",
1608         .tag   = AUD_OPT_INT,
1609         .valp  = &conf.fixed_in.settings.freq,
1610         .descr = "Frequency for fixed host ADC"
1611     },
1612     {
1613         .name  = "ADC_FIXED_FMT",
1614         .tag   = AUD_OPT_FMT,
1615         .valp  = &conf.fixed_in.settings.fmt,
1616         .descr = "Format for fixed host ADC"
1617     },
1618     {
1619         .name  = "ADC_FIXED_CHANNELS",
1620         .tag   = AUD_OPT_INT,
1621         .valp  = &conf.fixed_in.settings.nchannels,
1622         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1623     },
1624     {
1625         .name  = "ADC_VOICES",
1626         .tag   = AUD_OPT_INT,
1627         .valp  = &conf.fixed_in.nb_voices,
1628         .descr = "Number of voices for ADC"
1629     },
1630     {
1631         .name  = "ADC_TRY_POLL",
1632         .tag   = AUD_OPT_BOOL,
1633         .valp  = &conf.try_poll_in,
1634         .descr = "Attempt using poll mode for ADC"
1635     },
1636     /* Misc */
1637     {
1638         .name  = "TIMER_PERIOD",
1639         .tag   = AUD_OPT_INT,
1640         .valp  = &conf.period.hertz,
1641         .descr = "Timer period in HZ (0 - use lowest possible)"
1642     },
1643     {
1644         .name  = "PLIVE",
1645         .tag   = AUD_OPT_BOOL,
1646         .valp  = &conf.plive,
1647         .descr = "(undocumented)"
1648     },
1649     {
1650         .name  = "LOG_TO_MONITOR",
1651         .tag   = AUD_OPT_BOOL,
1652         .valp  = &conf.log_to_monitor,
1653         .descr = "Print logging messages to monitor instead of stderr"
1654     },
1655     { /* End of list */ }
1656 };
1657
1658 static void audio_pp_nb_voices (const char *typ, int nb)
1659 {
1660     switch (nb) {
1661     case 0:
1662         printf ("Does not support %s\n", typ);
1663         break;
1664     case 1:
1665         printf ("One %s voice\n", typ);
1666         break;
1667     case INT_MAX:
1668         printf ("Theoretically supports many %s voices\n", typ);
1669         break;
1670     default:
1671         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1672         break;
1673     }
1674
1675 }
1676
1677 void AUD_help (void)
1678 {
1679     size_t i;
1680
1681     audio_process_options ("AUDIO", audio_options);
1682     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1683         struct audio_driver *d = drvtab[i];
1684         if (d->options) {
1685             audio_process_options (d->name, d->options);
1686         }
1687     }
1688
1689     printf ("Audio options:\n");
1690     audio_print_options ("AUDIO", audio_options);
1691     printf ("\n");
1692
1693     printf ("Available drivers:\n");
1694
1695     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1696         struct audio_driver *d = drvtab[i];
1697
1698         printf ("Name: %s\n", d->name);
1699         printf ("Description: %s\n", d->descr);
1700
1701         audio_pp_nb_voices ("playback", d->max_voices_out);
1702         audio_pp_nb_voices ("capture", d->max_voices_in);
1703
1704         if (d->options) {
1705             printf ("Options:\n");
1706             audio_print_options (d->name, d->options);
1707         }
1708         else {
1709             printf ("No options\n");
1710         }
1711         printf ("\n");
1712     }
1713
1714     printf (
1715         "Options are settable through environment variables.\n"
1716         "Example:\n"
1717 #ifdef _WIN32
1718         "  set QEMU_AUDIO_DRV=wav\n"
1719         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1720 #else
1721         "  export QEMU_AUDIO_DRV=wav\n"
1722         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1723         "(for csh replace export with setenv in the above)\n"
1724 #endif
1725         "  qemu ...\n\n"
1726         );
1727 }
1728
1729 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1730 {
1731     if (drv->options) {
1732         audio_process_options (drv->name, drv->options);
1733     }
1734     s->drv_opaque = drv->init ();
1735
1736     if (s->drv_opaque) {
1737         audio_init_nb_voices_out (drv);
1738         audio_init_nb_voices_in (drv);
1739         s->drv = drv;
1740         return 0;
1741     }
1742     else {
1743         dolog ("Could not init `%s' audio driver\n", drv->name);
1744         return -1;
1745     }
1746 }
1747
1748 static void audio_vm_change_state_handler (void *opaque, int running,
1749                                            RunState state)
1750 {
1751     AudioState *s = opaque;
1752     HWVoiceOut *hwo = NULL;
1753     HWVoiceIn *hwi = NULL;
1754     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1755
1756     s->vm_running = running;
1757     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1758         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1759     }
1760
1761     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1762         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1763     }
1764     audio_reset_timer (s);
1765 }
1766
1767 static void audio_atexit (void)
1768 {
1769     AudioState *s = &glob_audio_state;
1770     HWVoiceOut *hwo = NULL;
1771     HWVoiceIn *hwi = NULL;
1772
1773     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1774         SWVoiceCap *sc;
1775
1776         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1777         hwo->pcm_ops->fini_out (hwo);
1778
1779         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1780             CaptureVoiceOut *cap = sc->cap;
1781             struct capture_callback *cb;
1782
1783             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1784                 cb->ops.destroy (cb->opaque);
1785             }
1786         }
1787     }
1788
1789     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1790         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1791         hwi->pcm_ops->fini_in (hwi);
1792     }
1793
1794     if (s->drv) {
1795         s->drv->fini (s->drv_opaque);
1796     }
1797 }
1798
1799 static const VMStateDescription vmstate_audio = {
1800     .name = "audio",
1801     .version_id = 1,
1802     .minimum_version_id = 1,
1803     .minimum_version_id_old = 1,
1804     .fields      = (VMStateField []) {
1805         VMSTATE_END_OF_LIST()
1806     }
1807 };
1808
1809 static void audio_init (void)
1810 {
1811     size_t i;
1812     int done = 0;
1813     const char *drvname;
1814     VMChangeStateEntry *e;
1815     AudioState *s = &glob_audio_state;
1816
1817     if (s->drv) {
1818         return;
1819     }
1820
1821     QLIST_INIT (&s->hw_head_out);
1822     QLIST_INIT (&s->hw_head_in);
1823     QLIST_INIT (&s->cap_head);
1824     atexit (audio_atexit);
1825
1826     s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1827     if (!s->ts) {
1828         hw_error("Could not create audio timer\n");
1829     }
1830
1831     audio_process_options ("AUDIO", audio_options);
1832
1833     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1834     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1835
1836     if (s->nb_hw_voices_out <= 0) {
1837         dolog ("Bogus number of playback voices %d, setting to 1\n",
1838                s->nb_hw_voices_out);
1839         s->nb_hw_voices_out = 1;
1840     }
1841
1842     if (s->nb_hw_voices_in <= 0) {
1843         dolog ("Bogus number of capture voices %d, setting to 0\n",
1844                s->nb_hw_voices_in);
1845         s->nb_hw_voices_in = 0;
1846     }
1847
1848     {
1849         int def;
1850         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1851     }
1852
1853     if (drvname) {
1854         int found = 0;
1855
1856         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1857             if (!strcmp (drvname, drvtab[i]->name)) {
1858                 done = !audio_driver_init (s, drvtab[i]);
1859                 found = 1;
1860                 break;
1861             }
1862         }
1863
1864         if (!found) {
1865             dolog ("Unknown audio driver `%s'\n", drvname);
1866             dolog ("Run with -audio-help to list available drivers\n");
1867         }
1868     }
1869
1870     if (!done) {
1871         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1872             if (drvtab[i]->can_be_default) {
1873                 done = !audio_driver_init (s, drvtab[i]);
1874             }
1875         }
1876     }
1877
1878     if (!done) {
1879         done = !audio_driver_init (s, &no_audio_driver);
1880         if (!done) {
1881             hw_error("Could not initialize audio subsystem\n");
1882         }
1883         else {
1884             dolog ("warning: Using timer based audio emulation\n");
1885         }
1886     }
1887
1888     if (conf.period.hertz <= 0) {
1889         if (conf.period.hertz < 0) {
1890             dolog ("warning: Timer period is negative - %d "
1891                    "treating as zero\n",
1892                    conf.period.hertz);
1893         }
1894         conf.period.ticks = 1;
1895     } else {
1896         conf.period.ticks =
1897             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1898     }
1899
1900     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1901     if (!e) {
1902         dolog ("warning: Could not register change state handler\n"
1903                "(Audio can continue looping even after stopping the VM)\n");
1904     }
1905
1906     QLIST_INIT (&s->card_head);
1907     vmstate_register (NULL, 0, &vmstate_audio, s);
1908 }
1909
1910 void AUD_register_card (const char *name, QEMUSoundCard *card)
1911 {
1912     audio_init ();
1913     card->name = g_strdup (name);
1914     memset (&card->entries, 0, sizeof (card->entries));
1915     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1916 }
1917
1918 void AUD_remove_card (QEMUSoundCard *card)
1919 {
1920     QLIST_REMOVE (card, entries);
1921     g_free (card->name);
1922 }
1923
1924
1925 CaptureVoiceOut *AUD_add_capture (
1926     struct audsettings *as,
1927     struct audio_capture_ops *ops,
1928     void *cb_opaque
1929     )
1930 {
1931     AudioState *s = &glob_audio_state;
1932     CaptureVoiceOut *cap;
1933     struct capture_callback *cb;
1934
1935     if (audio_validate_settings (as)) {
1936         dolog ("Invalid settings were passed when trying to add capture\n");
1937         audio_print_settings (as);
1938         goto err0;
1939     }
1940
1941     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1942     if (!cb) {
1943         dolog ("Could not allocate capture callback information, size %zu\n",
1944                sizeof (*cb));
1945         goto err0;
1946     }
1947     cb->ops = *ops;
1948     cb->opaque = cb_opaque;
1949
1950     cap = audio_pcm_capture_find_specific (as);
1951     if (cap) {
1952         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1953         return cap;
1954     }
1955     else {
1956         HWVoiceOut *hw;
1957         CaptureVoiceOut *cap;
1958
1959         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1960         if (!cap) {
1961             dolog ("Could not allocate capture voice, size %zu\n",
1962                    sizeof (*cap));
1963             goto err1;
1964         }
1965
1966         hw = &cap->hw;
1967         QLIST_INIT (&hw->sw_head);
1968         QLIST_INIT (&cap->cb_head);
1969
1970         /* XXX find a more elegant way */
1971         hw->samples = 4096 * 4;
1972         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1973                                     sizeof (struct st_sample));
1974         if (!hw->mix_buf) {
1975             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1976                    hw->samples);
1977             goto err2;
1978         }
1979
1980         audio_pcm_init_info (&hw->info, as);
1981
1982         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1983         if (!cap->buf) {
1984             dolog ("Could not allocate capture buffer "
1985                    "(%d samples, each %d bytes)\n",
1986                    hw->samples, 1 << hw->info.shift);
1987             goto err3;
1988         }
1989
1990         hw->clip = mixeng_clip
1991             [hw->info.nchannels == 2]
1992             [hw->info.sign]
1993             [hw->info.swap_endianness]
1994             [audio_bits_to_index (hw->info.bits)];
1995
1996         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1997         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1998
1999         hw = NULL;
2000         while ((hw = audio_pcm_hw_find_any_out (hw))) {
2001             audio_attach_capture (hw);
2002         }
2003         return cap;
2004
2005     err3:
2006         g_free (cap->hw.mix_buf);
2007     err2:
2008         g_free (cap);
2009     err1:
2010         g_free (cb);
2011     err0:
2012         return NULL;
2013     }
2014 }
2015
2016 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2017 {
2018     struct capture_callback *cb;
2019
2020     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2021         if (cb->opaque == cb_opaque) {
2022             cb->ops.destroy (cb_opaque);
2023             QLIST_REMOVE (cb, entries);
2024             g_free (cb);
2025
2026             if (!cap->cb_head.lh_first) {
2027                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2028
2029                 while (sw) {
2030                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2031 #ifdef DEBUG_CAPTURE
2032                     dolog ("freeing %s\n", sw->name);
2033 #endif
2034
2035                     sw1 = sw->entries.le_next;
2036                     if (sw->rate) {
2037                         st_rate_stop (sw->rate);
2038                         sw->rate = NULL;
2039                     }
2040                     QLIST_REMOVE (sw, entries);
2041                     QLIST_REMOVE (sc, entries);
2042                     g_free (sc);
2043                     sw = sw1;
2044                 }
2045                 QLIST_REMOVE (cap, entries);
2046                 g_free (cap);
2047             }
2048             return;
2049         }
2050     }
2051 }
2052
2053 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2054 {
2055     if (sw) {
2056         sw->vol.mute = mute;
2057         sw->vol.l = nominal_volume.l * lvol / 255;
2058         sw->vol.r = nominal_volume.r * rvol / 255;
2059     }
2060 }
2061
2062 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2063 {
2064     if (sw) {
2065         sw->vol.mute = mute;
2066         sw->vol.l = nominal_volume.l * lvol / 255;
2067         sw->vol.r = nominal_volume.r * rvol / 255;
2068     }
2069 }