audio/audio.c

   1 /*
   2  * QEMU Audio subsystem
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "audio.h"
  27 #include "monitor/monitor.h"
  28 #include "qemu/timer.h"
  29 #include "sysemu/sysemu.h"
  30 #include "qemu/cutils.h"
  31 #include "sysemu/replay.h"
  32
  33 #define AUDIO_CAP "audio"
  34 #include "audio_int.h"
  35
  36 /* #define DEBUG_LIVE */
  37 /* #define DEBUG_OUT */
  38 /* #define DEBUG_CAPTURE */
  39 /* #define DEBUG_POLL */
  40
  41 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  42
  43
  44 /* Order of CONFIG_AUDIO_DRIVERS is import.
  45    The 1st one is the one used by default, that is the reason
  46     that we generate the list.
  47 */
  48 static struct audio_driver *drvtab[] = {
  49 #ifdef CONFIG_SPICE
  50     &spice_audio_driver,
  51 #endif
  52     CONFIG_AUDIO_DRIVERS
  53     &no_audio_driver,
  54     &wav_audio_driver
  55 };
  56
  57 struct fixed_settings {
  58     int enabled;
  59     int nb_voices;
  60     int greedy;
  61     struct audsettings settings;
  62 };
  63
  64 static struct {
  65     struct fixed_settings fixed_out;
  66     struct fixed_settings fixed_in;
  67     union {
  68         int hertz;
  69         int64_t ticks;
  70     } period;
  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 = 100 },
  99     .try_poll_in = 1,
 100     .try_poll_out = 1,
 101 };
 102
 103 static AudioState glob_audio_state;
 104
 105 const struct mixeng_volume nominal_volume = {
 106     .mute = 0,
 107 #ifdef FLOAT_MIXENG
 108     .r = 1.0,
 109     .l = 1.0,
 110 #else
 111     .r = 1ULL << 32,
 112     .l = 1ULL << 32,
 113 #endif
 114 };
 115
 116 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 117 #error No its not
 118 #else
 119 static void audio_print_options (const char *prefix,
 120                                  struct audio_option *opt);
 121
 122 int audio_bug (const char *funcname, int cond)
 123 {
 124     if (cond) {
 125         static int shown;
 126
 127         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 128         if (!shown) {
 129             struct audio_driver *d;
 130
 131             shown = 1;
 132             AUD_log (NULL, "Save all your work and restart without audio\n");
 133             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 134             AUD_log (NULL, "I am sorry\n");
 135             d = glob_audio_state.drv;
 136             if (d) {
 137                 audio_print_options (d->name, d->options);
 138             }
 139         }
 140         AUD_log (NULL, "Context:\n");
 141
 142 #if defined AUDIO_BREAKPOINT_ON_BUG
 143 #  if defined HOST_I386
 144 #    if defined __GNUC__
 145         __asm__ ("int3");
 146 #    elif defined _MSC_VER
 147         _asm _emit 0xcc;
 148 #    else
 149         abort ();
 150 #    endif
 151 #  else
 152         abort ();
 153 #  endif
 154 #endif
 155     }
 156
 157     return cond;
 158 }
 159 #endif
 160
 161 static inline int audio_bits_to_index (int bits)
 162 {
 163     switch (bits) {
 164     case 8:
 165         return 0;
 166
 167     case 16:
 168         return 1;
 169
 170     case 32:
 171         return 2;
 172
 173     default:
 174         audio_bug ("bits_to_index", 1);
 175         AUD_log (NULL, "invalid bits %d\n", bits);
 176         return 0;
 177     }
 178 }
 179
 180 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 181 {
 182     int cond;
 183     size_t len;
 184
 185     len = nmemb * size;
 186     cond = !nmemb || !size;
 187     cond |= nmemb < 0;
 188     cond |= len < size;
 189
 190     if (audio_bug ("audio_calloc", cond)) {
 191         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 192                  funcname);
 193         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 194         return NULL;
 195     }
 196
 197     return g_malloc0 (len);
 198 }
 199
 200 static char *audio_alloc_prefix (const char *s)
 201 {
 202     const char qemu_prefix[] = "QEMU_";
 203     size_t len, i;
 204     char *r, *u;
 205
 206     if (!s) {
 207         return NULL;
 208     }
 209
 210     len = strlen (s);
 211     r = g_malloc (len + sizeof (qemu_prefix));
 212
 213     u = r + sizeof (qemu_prefix) - 1;
 214
 215     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 216     pstrcat (r, len + sizeof (qemu_prefix), s);
 217
 218     for (i = 0; i < len; ++i) {
 219         u[i] = qemu_toupper(u[i]);
 220     }
 221
 222     return r;
 223 }
 224
 225 static const char *audio_audfmt_to_string (audfmt_e fmt)
 226 {
 227     switch (fmt) {
 228     case AUD_FMT_U8:
 229         return "U8";
 230
 231     case AUD_FMT_U16:
 232         return "U16";
 233
 234     case AUD_FMT_S8:
 235         return "S8";
 236
 237     case AUD_FMT_S16:
 238         return "S16";
 239
 240     case AUD_FMT_U32:
 241         return "U32";
 242
 243     case AUD_FMT_S32:
 244         return "S32";
 245     }
 246
 247     dolog ("Bogus audfmt %d returning S16\n", fmt);
 248     return "S16";
 249 }
 250
 251 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 252                                         int *defaultp)
 253 {
 254     if (!strcasecmp (s, "u8")) {
 255         *defaultp = 0;
 256         return AUD_FMT_U8;
 257     }
 258     else if (!strcasecmp (s, "u16")) {
 259         *defaultp = 0;
 260         return AUD_FMT_U16;
 261     }
 262     else if (!strcasecmp (s, "u32")) {
 263         *defaultp = 0;
 264         return AUD_FMT_U32;
 265     }
 266     else if (!strcasecmp (s, "s8")) {
 267         *defaultp = 0;
 268         return AUD_FMT_S8;
 269     }
 270     else if (!strcasecmp (s, "s16")) {
 271         *defaultp = 0;
 272         return AUD_FMT_S16;
 273     }
 274     else if (!strcasecmp (s, "s32")) {
 275         *defaultp = 0;
 276         return AUD_FMT_S32;
 277     }
 278     else {
 279         dolog ("Bogus audio format `%s' using %s\n",
 280                s, audio_audfmt_to_string (defval));
 281         *defaultp = 1;
 282         return defval;
 283     }
 284 }
 285
 286 static audfmt_e audio_get_conf_fmt (const char *envname,
 287                                     audfmt_e defval,
 288                                     int *defaultp)
 289 {
 290     const char *var = getenv (envname);
 291     if (!var) {
 292         *defaultp = 1;
 293         return defval;
 294     }
 295     return audio_string_to_audfmt (var, defval, defaultp);
 296 }
 297
 298 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 299 {
 300     int val;
 301     char *strval;
 302
 303     strval = getenv (key);
 304     if (strval) {
 305         *defaultp = 0;
 306         val = atoi (strval);
 307         return val;
 308     }
 309     else {
 310         *defaultp = 1;
 311         return defval;
 312     }
 313 }
 314
 315 static const char *audio_get_conf_str (const char *key,
 316                                        const char *defval,
 317                                        int *defaultp)
 318 {
 319     const char *val = getenv (key);
 320     if (!val) {
 321         *defaultp = 1;
 322         return defval;
 323     }
 324     else {
 325         *defaultp = 0;
 326         return val;
 327     }
 328 }
 329
 330 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 331 {
 332     if (cap) {
 333         fprintf(stderr, "%s: ", cap);
 334     }
 335
 336     vfprintf(stderr, fmt, ap);
 337 }
 338
 339 void AUD_log (const char *cap, const char *fmt, ...)
 340 {
 341     va_list ap;
 342
 343     va_start (ap, fmt);
 344     AUD_vlog (cap, fmt, ap);
 345     va_end (ap);
 346 }
 347
 348 static void audio_print_options (const char *prefix,
 349                                  struct audio_option *opt)
 350 {
 351     char *uprefix;
 352
 353     if (!prefix) {
 354         dolog ("No prefix specified\n");
 355         return;
 356     }
 357
 358     if (!opt) {
 359         dolog ("No options\n");
 360         return;
 361     }
 362
 363     uprefix = audio_alloc_prefix (prefix);
 364
 365     for (; opt->name; opt++) {
 366         const char *state = "default";
 367         printf ("  %s_%s: ", uprefix, opt->name);
 368
 369         if (opt->overriddenp && *opt->overriddenp) {
 370             state = "current";
 371         }
 372
 373         switch (opt->tag) {
 374         case AUD_OPT_BOOL:
 375             {
 376                 int *intp = opt->valp;
 377                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 378             }
 379             break;
 380
 381         case AUD_OPT_INT:
 382             {
 383                 int *intp = opt->valp;
 384                 printf ("integer, %s = %d\n", state, *intp);
 385             }
 386             break;
 387
 388         case AUD_OPT_FMT:
 389             {
 390                 audfmt_e *fmtp = opt->valp;
 391                 printf (
 392                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 393                     state,
 394                     audio_audfmt_to_string (*fmtp)
 395                     );
 396             }
 397             break;
 398
 399         case AUD_OPT_STR:
 400             {
 401                 const char **strp = opt->valp;
 402                 printf ("string, %s = %s\n",
 403                         state,
 404                         *strp ? *strp : "(not set)");
 405             }
 406             break;
 407
 408         default:
 409             printf ("???\n");
 410             dolog ("Bad value tag for option %s_%s %d\n",
 411                    uprefix, opt->name, opt->tag);
 412             break;
 413         }
 414         printf ("    %s\n", opt->descr);
 415     }
 416
 417     g_free (uprefix);
 418 }
 419
 420 static void audio_process_options (const char *prefix,
 421                                    struct audio_option *opt)
 422 {
 423     char *optname;
 424     const char qemu_prefix[] = "QEMU_";
 425     size_t preflen, optlen;
 426
 427     if (audio_bug (AUDIO_FUNC, !prefix)) {
 428         dolog ("prefix = NULL\n");
 429         return;
 430     }
 431
 432     if (audio_bug (AUDIO_FUNC, !opt)) {
 433         dolog ("opt = NULL\n");
 434         return;
 435     }
 436
 437     preflen = strlen (prefix);
 438
 439     for (; opt->name; opt++) {
 440         size_t len, i;
 441         int def;
 442
 443         if (!opt->valp) {
 444             dolog ("Option value pointer for `%s' is not set\n",
 445                    opt->name);
 446             continue;
 447         }
 448
 449         len = strlen (opt->name);
 450         /* len of opt->name + len of prefix + size of qemu_prefix
 451          * (includes trailing zero) + zero + underscore (on behalf of
 452          * sizeof) */
 453         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 454         optname = g_malloc (optlen);
 455
 456         pstrcpy (optname, optlen, qemu_prefix);
 457
 458         /* copy while upper-casing, including trailing zero */
 459         for (i = 0; i <= preflen; ++i) {
 460             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 461         }
 462         pstrcat (optname, optlen, "_");
 463         pstrcat (optname, optlen, opt->name);
 464
 465         def = 1;
 466         switch (opt->tag) {
 467         case AUD_OPT_BOOL:
 468         case AUD_OPT_INT:
 469             {
 470                 int *intp = opt->valp;
 471                 *intp = audio_get_conf_int (optname, *intp, &def);
 472             }
 473             break;
 474
 475         case AUD_OPT_FMT:
 476             {
 477                 audfmt_e *fmtp = opt->valp;
 478                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 479             }
 480             break;
 481
 482         case AUD_OPT_STR:
 483             {
 484                 const char **strp = opt->valp;
 485                 *strp = audio_get_conf_str (optname, *strp, &def);
 486             }
 487             break;
 488
 489         default:
 490             dolog ("Bad value tag for option `%s' - %d\n",
 491                    optname, opt->tag);
 492             break;
 493         }
 494
 495         if (!opt->overriddenp) {
 496             opt->overriddenp = &opt->overridden;
 497         }
 498         *opt->overriddenp = !def;
 499         g_free (optname);
 500     }
 501 }
 502
 503 static void audio_print_settings (struct audsettings *as)
 504 {
 505     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 506
 507     switch (as->fmt) {
 508     case AUD_FMT_S8:
 509         AUD_log (NULL, "S8");
 510         break;
 511     case AUD_FMT_U8:
 512         AUD_log (NULL, "U8");
 513         break;
 514     case AUD_FMT_S16:
 515         AUD_log (NULL, "S16");
 516         break;
 517     case AUD_FMT_U16:
 518         AUD_log (NULL, "U16");
 519         break;
 520     case AUD_FMT_S32:
 521         AUD_log (NULL, "S32");
 522         break;
 523     case AUD_FMT_U32:
 524         AUD_log (NULL, "U32");
 525         break;
 526     default:
 527         AUD_log (NULL, "invalid(%d)", as->fmt);
 528         break;
 529     }
 530
 531     AUD_log (NULL, " endianness=");
 532     switch (as->endianness) {
 533     case 0:
 534         AUD_log (NULL, "little");
 535         break;
 536     case 1:
 537         AUD_log (NULL, "big");
 538         break;
 539     default:
 540         AUD_log (NULL, "invalid");
 541         break;
 542     }
 543     AUD_log (NULL, "\n");
 544 }
 545
 546 static int audio_validate_settings (struct audsettings *as)
 547 {
 548     int invalid;
 549
 550     invalid = as->nchannels != 1 && as->nchannels != 2;
 551     invalid |= as->endianness != 0 && as->endianness != 1;
 552
 553     switch (as->fmt) {
 554     case AUD_FMT_S8:
 555     case AUD_FMT_U8:
 556     case AUD_FMT_S16:
 557     case AUD_FMT_U16:
 558     case AUD_FMT_S32:
 559     case AUD_FMT_U32:
 560         break;
 561     default:
 562         invalid = 1;
 563         break;
 564     }
 565
 566     invalid |= as->freq <= 0;
 567     return invalid ? -1 : 0;
 568 }
 569
 570 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 571 {
 572     int bits = 8, sign = 0;
 573
 574     switch (as->fmt) {
 575     case AUD_FMT_S8:
 576         sign = 1;
 577         /* fall through */
 578     case AUD_FMT_U8:
 579         break;
 580
 581     case AUD_FMT_S16:
 582         sign = 1;
 583         /* fall through */
 584     case AUD_FMT_U16:
 585         bits = 16;
 586         break;
 587
 588     case AUD_FMT_S32:
 589         sign = 1;
 590         /* fall through */
 591     case AUD_FMT_U32:
 592         bits = 32;
 593         break;
 594     }
 595     return info->freq == as->freq
 596         && info->nchannels == as->nchannels
 597         && info->sign == sign
 598         && info->bits == bits
 599         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 600 }
 601
 602 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 603 {
 604     int bits = 8, sign = 0, shift = 0;
 605
 606     switch (as->fmt) {
 607     case AUD_FMT_S8:
 608         sign = 1;
 609     case AUD_FMT_U8:
 610         break;
 611
 612     case AUD_FMT_S16:
 613         sign = 1;
 614     case AUD_FMT_U16:
 615         bits = 16;
 616         shift = 1;
 617         break;
 618
 619     case AUD_FMT_S32:
 620         sign = 1;
 621     case AUD_FMT_U32:
 622         bits = 32;
 623         shift = 2;
 624         break;
 625     }
 626
 627     info->freq = as->freq;
 628     info->bits = bits;
 629     info->sign = sign;
 630     info->nchannels = as->nchannels;
 631     info->shift = (as->nchannels == 2) + shift;
 632     info->align = (1 << info->shift) - 1;
 633     info->bytes_per_second = info->freq << info->shift;
 634     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 635 }
 636
 637 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 638 {
 639     if (!len) {
 640         return;
 641     }
 642
 643     if (info->sign) {
 644         memset (buf, 0x00, len << info->shift);
 645     }
 646     else {
 647         switch (info->bits) {
 648         case 8:
 649             memset (buf, 0x80, len << info->shift);
 650             break;
 651
 652         case 16:
 653             {
 654                 int i;
 655                 uint16_t *p = buf;
 656                 int shift = info->nchannels - 1;
 657                 short s = INT16_MAX;
 658
 659                 if (info->swap_endianness) {
 660                     s = bswap16 (s);
 661                 }
 662
 663                 for (i = 0; i < len << shift; i++) {
 664                     p[i] = s;
 665                 }
 666             }
 667             break;
 668
 669         case 32:
 670             {
 671                 int i;
 672                 uint32_t *p = buf;
 673                 int shift = info->nchannels - 1;
 674                 int32_t s = INT32_MAX;
 675
 676                 if (info->swap_endianness) {
 677                     s = bswap32 (s);
 678                 }
 679
 680                 for (i = 0; i < len << shift; i++) {
 681                     p[i] = s;
 682                 }
 683             }
 684             break;
 685
 686         default:
 687             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 688                      info->bits);
 689             break;
 690         }
 691     }
 692 }
 693
 694 /*
 695  * Capture
 696  */
 697 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 698 {
 699     (void) src;
 700     (void) dst;
 701     (void) samples;
 702 }
 703
 704 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 705     struct audsettings *as
 706     )
 707 {
 708     CaptureVoiceOut *cap;
 709     AudioState *s = &glob_audio_state;
 710
 711     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 712         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 713             return cap;
 714         }
 715     }
 716     return NULL;
 717 }
 718
 719 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 720 {
 721     struct capture_callback *cb;
 722
 723 #ifdef DEBUG_CAPTURE
 724     dolog ("notification %d sent\n", cmd);
 725 #endif
 726     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 727         cb->ops.notify (cb->opaque, cmd);
 728     }
 729 }
 730
 731 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 732 {
 733     if (cap->hw.enabled != enabled) {
 734         audcnotification_e cmd;
 735         cap->hw.enabled = enabled;
 736         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 737         audio_notify_capture (cap, cmd);
 738     }
 739 }
 740
 741 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 742 {
 743     HWVoiceOut *hw = &cap->hw;
 744     SWVoiceOut *sw;
 745     int enabled = 0;
 746
 747     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 748         if (sw->active) {
 749             enabled = 1;
 750             break;
 751         }
 752     }
 753     audio_capture_maybe_changed (cap, enabled);
 754 }
 755
 756 static void audio_detach_capture (HWVoiceOut *hw)
 757 {
 758     SWVoiceCap *sc = hw->cap_head.lh_first;
 759
 760     while (sc) {
 761         SWVoiceCap *sc1 = sc->entries.le_next;
 762         SWVoiceOut *sw = &sc->sw;
 763         CaptureVoiceOut *cap = sc->cap;
 764         int was_active = sw->active;
 765
 766         if (sw->rate) {
 767             st_rate_stop (sw->rate);
 768             sw->rate = NULL;
 769         }
 770
 771         QLIST_REMOVE (sw, entries);
 772         QLIST_REMOVE (sc, entries);
 773         g_free (sc);
 774         if (was_active) {
 775             /* We have removed soft voice from the capture:
 776                this might have changed the overall status of the capture
 777                since this might have been the only active voice */
 778             audio_recalc_and_notify_capture (cap);
 779         }
 780         sc = sc1;
 781     }
 782 }
 783
 784 static int audio_attach_capture (HWVoiceOut *hw)
 785 {
 786     AudioState *s = &glob_audio_state;
 787     CaptureVoiceOut *cap;
 788
 789     audio_detach_capture (hw);
 790     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 791         SWVoiceCap *sc;
 792         SWVoiceOut *sw;
 793         HWVoiceOut *hw_cap = &cap->hw;
 794
 795         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 796         if (!sc) {
 797             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 798                    sizeof (*sc));
 799             return -1;
 800         }
 801
 802         sc->cap = cap;
 803         sw = &sc->sw;
 804         sw->hw = hw_cap;
 805         sw->info = hw->info;
 806         sw->empty = 1;
 807         sw->active = hw->enabled;
 808         sw->conv = noop_conv;
 809         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 810         sw->vol = nominal_volume;
 811         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 812         if (!sw->rate) {
 813             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 814             g_free (sw);
 815             return -1;
 816         }
 817         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 818         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 819 #ifdef DEBUG_CAPTURE
 820         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 821                                     hw, sw->info.freq, sw->info.bits,
 822                                     sw->info.nchannels);
 823         dolog ("Added %s active = %d\n", sw->name, sw->active);
 824 #endif
 825         if (sw->active) {
 826             audio_capture_maybe_changed (cap, 1);
 827         }
 828     }
 829     return 0;
 830 }
 831
 832 /*
 833  * Hard voice (capture)
 834  */
 835 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 836 {
 837     SWVoiceIn *sw;
 838     int m = hw->total_samples_captured;
 839
 840     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 841         if (sw->active) {
 842             m = audio_MIN (m, sw->total_hw_samples_acquired);
 843         }
 844     }
 845     return m;
 846 }
 847
 848 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 849 {
 850     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 851     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 852         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 853         return 0;
 854     }
 855     return live;
 856 }
 857
 858 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 859                            int live, int pending)
 860 {
 861     int left = hw->samples - pending;
 862     int len = audio_MIN (left, live);
 863     int clipped = 0;
 864
 865     while (len) {
 866         struct st_sample *src = hw->mix_buf + hw->rpos;
 867         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 868         int samples_till_end_of_buf = hw->samples - hw->rpos;
 869         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 870
 871         hw->clip (dst, src, samples_to_clip);
 872
 873         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 874         len -= samples_to_clip;
 875         clipped += samples_to_clip;
 876     }
 877     return clipped;
 878 }
 879
 880 /*
 881  * Soft voice (capture)
 882  */
 883 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 884 {
 885     HWVoiceIn *hw = sw->hw;
 886     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 887     int rpos;
 888
 889     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 890         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 891         return 0;
 892     }
 893
 894     rpos = hw->wpos - live;
 895     if (rpos >= 0) {
 896         return rpos;
 897     }
 898     else {
 899         return hw->samples + rpos;
 900     }
 901 }
 902
 903 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 904 {
 905     HWVoiceIn *hw = sw->hw;
 906     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 907     struct st_sample *src, *dst = sw->buf;
 908
 909     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 910
 911     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 912     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 913         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 914         return 0;
 915     }
 916
 917     samples = size >> sw->info.shift;
 918     if (!live) {
 919         return 0;
 920     }
 921
 922     swlim = (live * sw->ratio) >> 32;
 923     swlim = audio_MIN (swlim, samples);
 924
 925     while (swlim) {
 926         src = hw->conv_buf + rpos;
 927         isamp = hw->wpos - rpos;
 928         /* XXX: <= ? */
 929         if (isamp <= 0) {
 930             isamp = hw->samples - rpos;
 931         }
 932
 933         if (!isamp) {
 934             break;
 935         }
 936         osamp = swlim;
 937
 938         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 939             dolog ("osamp=%d\n", osamp);
 940             return 0;
 941         }
 942
 943         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 944         swlim -= osamp;
 945         rpos = (rpos + isamp) % hw->samples;
 946         dst += osamp;
 947         ret += osamp;
 948         total += isamp;
 949     }
 950
 951     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 952         mixeng_volume (sw->buf, ret, &sw->vol);
 953     }
 954
 955     sw->clip (buf, sw->buf, ret);
 956     sw->total_hw_samples_acquired += total;
 957     return ret << sw->info.shift;
 958 }
 959
 960 /*
 961  * Hard voice (playback)
 962  */
 963 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 964 {
 965     SWVoiceOut *sw;
 966     int m = INT_MAX;
 967     int nb_live = 0;
 968
 969     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 970         if (sw->active || !sw->empty) {
 971             m = audio_MIN (m, sw->total_hw_samples_mixed);
 972             nb_live += 1;
 973         }
 974     }
 975
 976     *nb_livep = nb_live;
 977     return m;
 978 }
 979
 980 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 981 {
 982     int smin;
 983     int nb_live1;
 984
 985     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 986     if (nb_live) {
 987         *nb_live = nb_live1;
 988     }
 989
 990     if (nb_live1) {
 991         int live = smin;
 992
 993         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 994             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 995             return 0;
 996         }
 997         return live;
 998     }
 999     return 0;
1000 }
1001
1002 /*
1003  * Soft voice (playback)
1004  */
1005 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1006 {
1007     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1008     int ret = 0, pos = 0, total = 0;
1009
1010     if (!sw) {
1011         return size;
1012     }
1013
1014     hwsamples = sw->hw->samples;
1015
1016     live = sw->total_hw_samples_mixed;
1017     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1018         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1019         return 0;
1020     }
1021
1022     if (live == hwsamples) {
1023 #ifdef DEBUG_OUT
1024         dolog ("%s is full %d\n", sw->name, live);
1025 #endif
1026         return 0;
1027     }
1028
1029     wpos = (sw->hw->rpos + live) % hwsamples;
1030     samples = size >> sw->info.shift;
1031
1032     dead = hwsamples - live;
1033     swlim = ((int64_t) dead << 32) / sw->ratio;
1034     swlim = audio_MIN (swlim, samples);
1035     if (swlim) {
1036         sw->conv (sw->buf, buf, swlim);
1037
1038         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1039             mixeng_volume (sw->buf, swlim, &sw->vol);
1040         }
1041     }
1042
1043     while (swlim) {
1044         dead = hwsamples - live;
1045         left = hwsamples - wpos;
1046         blck = audio_MIN (dead, left);
1047         if (!blck) {
1048             break;
1049         }
1050         isamp = swlim;
1051         osamp = blck;
1052         st_rate_flow_mix (
1053             sw->rate,
1054             sw->buf + pos,
1055             sw->hw->mix_buf + wpos,
1056             &isamp,
1057             &osamp
1058             );
1059         ret += isamp;
1060         swlim -= isamp;
1061         pos += isamp;
1062         live += osamp;
1063         wpos = (wpos + osamp) % hwsamples;
1064         total += osamp;
1065     }
1066
1067     sw->total_hw_samples_mixed += total;
1068     sw->empty = sw->total_hw_samples_mixed == 0;
1069
1070 #ifdef DEBUG_OUT
1071     dolog (
1072         "%s: write size %d ret %d total sw %d\n",
1073         SW_NAME (sw),
1074         size >> sw->info.shift,
1075         ret,
1076         sw->total_hw_samples_mixed
1077         );
1078 #endif
1079
1080     return ret << sw->info.shift;
1081 }
1082
1083 #ifdef DEBUG_AUDIO
1084 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1085 {
1086     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1087            cap, info->bits, info->sign, info->freq, info->nchannels);
1088 }
1089 #endif
1090
1091 #define DAC
1092 #include "audio_template.h"
1093 #undef DAC
1094 #include "audio_template.h"
1095
1096 /*
1097  * Timer
1098  */
1099 static int audio_is_timer_needed (void)
1100 {
1101     HWVoiceIn *hwi = NULL;
1102     HWVoiceOut *hwo = NULL;
1103
1104     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1105         if (!hwo->poll_mode) return 1;
1106     }
1107     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1108         if (!hwi->poll_mode) return 1;
1109     }
1110     return 0;
1111 }
1112
1113 static void audio_reset_timer (AudioState *s)
1114 {
1115     if (audio_is_timer_needed ()) {
1116         timer_mod_anticipate_ns(s->ts,
1117             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
1118     }
1119     else {
1120         timer_del (s->ts);
1121     }
1122 }
1123
1124 static void audio_timer (void *opaque)
1125 {
1126     audio_run ("timer");
1127     audio_reset_timer (opaque);
1128 }
1129
1130 /*
1131  * Public API
1132  */
1133 int AUD_write (SWVoiceOut *sw, void *buf, int size)
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     return sw->hw->pcm_ops->write(sw, buf, size);
1146 }
1147
1148 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1149 {
1150     if (!sw) {
1151         /* XXX: Consider options */
1152         return size;
1153     }
1154
1155     if (!sw->hw->enabled) {
1156         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1157         return 0;
1158     }
1159
1160     return sw->hw->pcm_ops->read(sw, buf, size);
1161 }
1162
1163 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1164 {
1165     return sw->hw->samples << sw->hw->info.shift;
1166 }
1167
1168 void AUD_set_active_out (SWVoiceOut *sw, int on)
1169 {
1170     HWVoiceOut *hw;
1171
1172     if (!sw) {
1173         return;
1174     }
1175
1176     hw = sw->hw;
1177     if (sw->active != on) {
1178         AudioState *s = &glob_audio_state;
1179         SWVoiceOut *temp_sw;
1180         SWVoiceCap *sc;
1181
1182         if (on) {
1183             hw->pending_disable = 0;
1184             if (!hw->enabled) {
1185                 hw->enabled = 1;
1186                 if (s->vm_running) {
1187                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1188                     audio_reset_timer (s);
1189                 }
1190             }
1191         }
1192         else {
1193             if (hw->enabled) {
1194                 int nb_active = 0;
1195
1196                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1197                      temp_sw = temp_sw->entries.le_next) {
1198                     nb_active += temp_sw->active != 0;
1199                 }
1200
1201                 hw->pending_disable = nb_active == 1;
1202             }
1203         }
1204
1205         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1206             sc->sw.active = hw->enabled;
1207             if (hw->enabled) {
1208                 audio_capture_maybe_changed (sc->cap, 1);
1209             }
1210         }
1211         sw->active = on;
1212     }
1213 }
1214
1215 void AUD_set_active_in (SWVoiceIn *sw, int on)
1216 {
1217     HWVoiceIn *hw;
1218
1219     if (!sw) {
1220         return;
1221     }
1222
1223     hw = sw->hw;
1224     if (sw->active != on) {
1225         AudioState *s = &glob_audio_state;
1226         SWVoiceIn *temp_sw;
1227
1228         if (on) {
1229             if (!hw->enabled) {
1230                 hw->enabled = 1;
1231                 if (s->vm_running) {
1232                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1233                     audio_reset_timer (s);
1234                 }
1235             }
1236             sw->total_hw_samples_acquired = hw->total_samples_captured;
1237         }
1238         else {
1239             if (hw->enabled) {
1240                 int nb_active = 0;
1241
1242                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1243                      temp_sw = temp_sw->entries.le_next) {
1244                     nb_active += temp_sw->active != 0;
1245                 }
1246
1247                 if (nb_active == 1) {
1248                     hw->enabled = 0;
1249                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1250                 }
1251             }
1252         }
1253         sw->active = on;
1254     }
1255 }
1256
1257 static int audio_get_avail (SWVoiceIn *sw)
1258 {
1259     int live;
1260
1261     if (!sw) {
1262         return 0;
1263     }
1264
1265     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1266     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1267         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1268         return 0;
1269     }
1270
1271     ldebug (
1272         "%s: get_avail live %d ret %" PRId64 "\n",
1273         SW_NAME (sw),
1274         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1275         );
1276
1277     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1278 }
1279
1280 static int audio_get_free (SWVoiceOut *sw)
1281 {
1282     int live, dead;
1283
1284     if (!sw) {
1285         return 0;
1286     }
1287
1288     live = sw->total_hw_samples_mixed;
1289
1290     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1291         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1292         return 0;
1293     }
1294
1295     dead = sw->hw->samples - live;
1296
1297 #ifdef DEBUG_OUT
1298     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1299            SW_NAME (sw),
1300            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1301 #endif
1302
1303     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1304 }
1305
1306 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1307 {
1308     int n;
1309
1310     if (hw->enabled) {
1311         SWVoiceCap *sc;
1312
1313         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1314             SWVoiceOut *sw = &sc->sw;
1315             int rpos2 = rpos;
1316
1317             n = samples;
1318             while (n) {
1319                 int till_end_of_hw = hw->samples - rpos2;
1320                 int to_write = audio_MIN (till_end_of_hw, n);
1321                 int bytes = to_write << hw->info.shift;
1322                 int written;
1323
1324                 sw->buf = hw->mix_buf + rpos2;
1325                 written = audio_pcm_sw_write (sw, NULL, bytes);
1326                 if (written - bytes) {
1327                     dolog ("Could not mix %d bytes into a capture "
1328                            "buffer, mixed %d\n",
1329                            bytes, written);
1330                     break;
1331                 }
1332                 n -= to_write;
1333                 rpos2 = (rpos2 + to_write) % hw->samples;
1334             }
1335         }
1336     }
1337
1338     n = audio_MIN (samples, hw->samples - rpos);
1339     mixeng_clear (hw->mix_buf + rpos, n);
1340     mixeng_clear (hw->mix_buf, samples - n);
1341 }
1342
1343 static void audio_run_out (AudioState *s)
1344 {
1345     HWVoiceOut *hw = NULL;
1346     SWVoiceOut *sw;
1347
1348     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1349         int played;
1350         int live, free, nb_live, cleanup_required, prev_rpos;
1351
1352         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1353         if (!nb_live) {
1354             live = 0;
1355         }
1356
1357         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1358             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1359             continue;
1360         }
1361
1362         if (hw->pending_disable && !nb_live) {
1363             SWVoiceCap *sc;
1364 #ifdef DEBUG_OUT
1365             dolog ("Disabling voice\n");
1366 #endif
1367             hw->enabled = 0;
1368             hw->pending_disable = 0;
1369             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1370             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1371                 sc->sw.active = 0;
1372                 audio_recalc_and_notify_capture (sc->cap);
1373             }
1374             continue;
1375         }
1376
1377         if (!live) {
1378             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1379                 if (sw->active) {
1380                     free = audio_get_free (sw);
1381                     if (free > 0) {
1382                         sw->callback.fn (sw->callback.opaque, free);
1383                     }
1384                 }
1385             }
1386             continue;
1387         }
1388
1389         prev_rpos = hw->rpos;
1390         played = hw->pcm_ops->run_out (hw, live);
1391         replay_audio_out(&played);
1392         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1393             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1394                    hw->rpos, hw->samples, played);
1395             hw->rpos = 0;
1396         }
1397
1398 #ifdef DEBUG_OUT
1399         dolog ("played=%d\n", played);
1400 #endif
1401
1402         if (played) {
1403             hw->ts_helper += played;
1404             audio_capture_mix_and_clear (hw, prev_rpos, played);
1405         }
1406
1407         cleanup_required = 0;
1408         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1409             if (!sw->active && sw->empty) {
1410                 continue;
1411             }
1412
1413             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1414                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1415                        played, sw->total_hw_samples_mixed);
1416                 played = sw->total_hw_samples_mixed;
1417             }
1418
1419             sw->total_hw_samples_mixed -= played;
1420
1421             if (!sw->total_hw_samples_mixed) {
1422                 sw->empty = 1;
1423                 cleanup_required |= !sw->active && !sw->callback.fn;
1424             }
1425
1426             if (sw->active) {
1427                 free = audio_get_free (sw);
1428                 if (free > 0) {
1429                     sw->callback.fn (sw->callback.opaque, free);
1430                 }
1431             }
1432         }
1433
1434         if (cleanup_required) {
1435             SWVoiceOut *sw1;
1436
1437             sw = hw->sw_head.lh_first;
1438             while (sw) {
1439                 sw1 = sw->entries.le_next;
1440                 if (!sw->active && !sw->callback.fn) {
1441                     audio_close_out (sw);
1442                 }
1443                 sw = sw1;
1444             }
1445         }
1446     }
1447 }
1448
1449 static void audio_run_in (AudioState *s)
1450 {
1451     HWVoiceIn *hw = NULL;
1452
1453     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1454         SWVoiceIn *sw;
1455         int captured = 0, min;
1456
1457         if (replay_mode != REPLAY_MODE_PLAY) {
1458             captured = hw->pcm_ops->run_in(hw);
1459         }
1460         replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
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 bool is_cleaning_up;
1748
1749 bool audio_is_cleaning_up(void)
1750 {
1751     return is_cleaning_up;
1752 }
1753
1754 void audio_cleanup(void)
1755 {
1756     AudioState *s = &glob_audio_state;
1757     HWVoiceOut *hwo, *hwon;
1758     HWVoiceIn *hwi, *hwin;
1759
1760     is_cleaning_up = true;
1761     QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1762         SWVoiceCap *sc;
1763
1764         if (hwo->enabled) {
1765             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1766         }
1767         hwo->pcm_ops->fini_out (hwo);
1768
1769         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1770             CaptureVoiceOut *cap = sc->cap;
1771             struct capture_callback *cb;
1772
1773             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1774                 cb->ops.destroy (cb->opaque);
1775             }
1776         }
1777         QLIST_REMOVE(hwo, entries);
1778     }
1779
1780     QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1781         if (hwi->enabled) {
1782             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1783         }
1784         hwi->pcm_ops->fini_in (hwi);
1785         QLIST_REMOVE(hwi, entries);
1786     }
1787
1788     if (s->drv) {
1789         s->drv->fini (s->drv_opaque);
1790         s->drv = NULL;
1791     }
1792 }
1793
1794 static const VMStateDescription vmstate_audio = {
1795     .name = "audio",
1796     .version_id = 1,
1797     .minimum_version_id = 1,
1798     .fields = (VMStateField[]) {
1799         VMSTATE_END_OF_LIST()
1800     }
1801 };
1802
1803 static void audio_init (void)
1804 {
1805     size_t i;
1806     int done = 0;
1807     const char *drvname;
1808     VMChangeStateEntry *e;
1809     AudioState *s = &glob_audio_state;
1810
1811     if (s->drv) {
1812         return;
1813     }
1814
1815     QLIST_INIT (&s->hw_head_out);
1816     QLIST_INIT (&s->hw_head_in);
1817     QLIST_INIT (&s->cap_head);
1818     atexit(audio_cleanup);
1819
1820     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1821
1822     audio_process_options ("AUDIO", audio_options);
1823
1824     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1825     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1826
1827     if (s->nb_hw_voices_out <= 0) {
1828         dolog ("Bogus number of playback voices %d, setting to 1\n",
1829                s->nb_hw_voices_out);
1830         s->nb_hw_voices_out = 1;
1831     }
1832
1833     if (s->nb_hw_voices_in <= 0) {
1834         dolog ("Bogus number of capture voices %d, setting to 0\n",
1835                s->nb_hw_voices_in);
1836         s->nb_hw_voices_in = 0;
1837     }
1838
1839     {
1840         int def;
1841         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1842     }
1843
1844     if (drvname) {
1845         int found = 0;
1846
1847         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1848             if (!strcmp (drvname, drvtab[i]->name)) {
1849                 done = !audio_driver_init (s, drvtab[i]);
1850                 found = 1;
1851                 break;
1852             }
1853         }
1854
1855         if (!found) {
1856             dolog ("Unknown audio driver `%s'\n", drvname);
1857             dolog ("Run with -audio-help to list available drivers\n");
1858         }
1859     }
1860
1861     if (!done) {
1862         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1863             if (drvtab[i]->can_be_default) {
1864                 done = !audio_driver_init (s, drvtab[i]);
1865             }
1866         }
1867     }
1868
1869     if (!done) {
1870         done = !audio_driver_init (s, &no_audio_driver);
1871         assert(done);
1872         dolog("warning: Using timer based audio emulation\n");
1873     }
1874
1875     if (conf.period.hertz <= 0) {
1876         if (conf.period.hertz < 0) {
1877             dolog ("warning: Timer period is negative - %d "
1878                    "treating as zero\n",
1879                    conf.period.hertz);
1880         }
1881         conf.period.ticks = 1;
1882     } else {
1883         conf.period.ticks = NANOSECONDS_PER_SECOND / conf.period.hertz;
1884     }
1885
1886     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1887     if (!e) {
1888         dolog ("warning: Could not register change state handler\n"
1889                "(Audio can continue looping even after stopping the VM)\n");
1890     }
1891
1892     QLIST_INIT (&s->card_head);
1893     vmstate_register (NULL, 0, &vmstate_audio, s);
1894 }
1895
1896 void AUD_register_card (const char *name, QEMUSoundCard *card)
1897 {
1898     audio_init ();
1899     card->name = g_strdup (name);
1900     memset (&card->entries, 0, sizeof (card->entries));
1901     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1902 }
1903
1904 void AUD_remove_card (QEMUSoundCard *card)
1905 {
1906     QLIST_REMOVE (card, entries);
1907     g_free (card->name);
1908 }
1909
1910
1911 CaptureVoiceOut *AUD_add_capture (
1912     struct audsettings *as,
1913     struct audio_capture_ops *ops,
1914     void *cb_opaque
1915     )
1916 {
1917     AudioState *s = &glob_audio_state;
1918     CaptureVoiceOut *cap;
1919     struct capture_callback *cb;
1920
1921     if (audio_validate_settings (as)) {
1922         dolog ("Invalid settings were passed when trying to add capture\n");
1923         audio_print_settings (as);
1924         goto err0;
1925     }
1926
1927     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1928     if (!cb) {
1929         dolog ("Could not allocate capture callback information, size %zu\n",
1930                sizeof (*cb));
1931         goto err0;
1932     }
1933     cb->ops = *ops;
1934     cb->opaque = cb_opaque;
1935
1936     cap = audio_pcm_capture_find_specific (as);
1937     if (cap) {
1938         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1939         return cap;
1940     }
1941     else {
1942         HWVoiceOut *hw;
1943         CaptureVoiceOut *cap;
1944
1945         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1946         if (!cap) {
1947             dolog ("Could not allocate capture voice, size %zu\n",
1948                    sizeof (*cap));
1949             goto err1;
1950         }
1951
1952         hw = &cap->hw;
1953         QLIST_INIT (&hw->sw_head);
1954         QLIST_INIT (&cap->cb_head);
1955
1956         /* XXX find a more elegant way */
1957         hw->samples = 4096 * 4;
1958         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1959                                     sizeof (struct st_sample));
1960         if (!hw->mix_buf) {
1961             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1962                    hw->samples);
1963             goto err2;
1964         }
1965
1966         audio_pcm_init_info (&hw->info, as);
1967
1968         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1969         if (!cap->buf) {
1970             dolog ("Could not allocate capture buffer "
1971                    "(%d samples, each %d bytes)\n",
1972                    hw->samples, 1 << hw->info.shift);
1973             goto err3;
1974         }
1975
1976         hw->clip = mixeng_clip
1977             [hw->info.nchannels == 2]
1978             [hw->info.sign]
1979             [hw->info.swap_endianness]
1980             [audio_bits_to_index (hw->info.bits)];
1981
1982         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1983         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1984
1985         QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
1986             audio_attach_capture (hw);
1987         }
1988         return cap;
1989
1990     err3:
1991         g_free (cap->hw.mix_buf);
1992     err2:
1993         g_free (cap);
1994     err1:
1995         g_free (cb);
1996     err0:
1997         return NULL;
1998     }
1999 }
2000
2001 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2002 {
2003     struct capture_callback *cb;
2004
2005     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2006         if (cb->opaque == cb_opaque) {
2007             cb->ops.destroy (cb_opaque);
2008             QLIST_REMOVE (cb, entries);
2009             g_free (cb);
2010
2011             if (!cap->cb_head.lh_first) {
2012                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2013
2014                 while (sw) {
2015                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2016 #ifdef DEBUG_CAPTURE
2017                     dolog ("freeing %s\n", sw->name);
2018 #endif
2019
2020                     sw1 = sw->entries.le_next;
2021                     if (sw->rate) {
2022                         st_rate_stop (sw->rate);
2023                         sw->rate = NULL;
2024                     }
2025                     QLIST_REMOVE (sw, entries);
2026                     QLIST_REMOVE (sc, entries);
2027                     g_free (sc);
2028                     sw = sw1;
2029                 }
2030                 QLIST_REMOVE (cap, entries);
2031                 g_free (cap);
2032             }
2033             return;
2034         }
2035     }
2036 }
2037
2038 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2039 {
2040     if (sw) {
2041         HWVoiceOut *hw = sw->hw;
2042
2043         sw->vol.mute = mute;
2044         sw->vol.l = nominal_volume.l * lvol / 255;
2045         sw->vol.r = nominal_volume.r * rvol / 255;
2046
2047         if (hw->pcm_ops->ctl_out) {
2048             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2049         }
2050     }
2051 }
2052
2053 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2054 {
2055     if (sw) {
2056         HWVoiceIn *hw = sw->hw;
2057
2058         sw->vol.mute = mute;
2059         sw->vol.l = nominal_volume.l * lvol / 255;
2060         sw->vol.r = nominal_volume.r * rvol / 255;
2061
2062         if (hw->pcm_ops->ctl_in) {
2063             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2064         }
2065     }
2066 }