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 #include "trace.h"
  33
  34 #define AUDIO_CAP "audio"
  35 #include "audio_int.h"
  36
  37 /* #define DEBUG_LIVE */
  38 /* #define DEBUG_OUT */
  39 /* #define DEBUG_CAPTURE */
  40 /* #define DEBUG_POLL */
  41
  42 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  43
  44
  45 /* Order of CONFIG_AUDIO_DRIVERS is import.
  46    The 1st one is the one used by default, that is the reason
  47     that we generate the list.
  48 */
  49 static const char *audio_prio_list[] = {
  50     "spice",
  51     CONFIG_AUDIO_DRIVERS
  52     "none",
  53     "wav",
  54 };
  55
  56 static QLIST_HEAD(, audio_driver) audio_drivers;
  57
  58 void audio_driver_register(audio_driver *drv)
  59 {
  60     QLIST_INSERT_HEAD(&audio_drivers, drv, next);
  61 }
  62
  63 audio_driver *audio_driver_lookup(const char *name)
  64 {
  65     struct audio_driver *d;
  66
  67     QLIST_FOREACH(d, &audio_drivers, next) {
  68         if (strcmp(name, d->name) == 0) {
  69             return d;
  70         }
  71     }
  72
  73     audio_module_load_one(name);
  74     QLIST_FOREACH(d, &audio_drivers, next) {
  75         if (strcmp(name, d->name) == 0) {
  76             return d;
  77         }
  78     }
  79
  80     return NULL;
  81 }
  82
  83 static void audio_module_load_all(void)
  84 {
  85     int i;
  86
  87     for (i = 0; i < ARRAY_SIZE(audio_prio_list); i++) {
  88         audio_driver_lookup(audio_prio_list[i]);
  89     }
  90 }
  91
  92 struct fixed_settings {
  93     int enabled;
  94     int nb_voices;
  95     int greedy;
  96     struct audsettings settings;
  97 };
  98
  99 static struct {
 100     struct fixed_settings fixed_out;
 101     struct fixed_settings fixed_in;
 102     union {
 103         int hertz;
 104         int64_t ticks;
 105     } period;
 106     int try_poll_in;
 107     int try_poll_out;
 108 } conf = {
 109     .fixed_out = { /* DAC fixed settings */
 110         .enabled = 1,
 111         .nb_voices = 1,
 112         .greedy = 1,
 113         .settings = {
 114             .freq = 44100,
 115             .nchannels = 2,
 116             .fmt = AUD_FMT_S16,
 117             .endianness =  AUDIO_HOST_ENDIANNESS,
 118         }
 119     },
 120
 121     .fixed_in = { /* ADC fixed settings */
 122         .enabled = 1,
 123         .nb_voices = 1,
 124         .greedy = 1,
 125         .settings = {
 126             .freq = 44100,
 127             .nchannels = 2,
 128             .fmt = AUD_FMT_S16,
 129             .endianness = AUDIO_HOST_ENDIANNESS,
 130         }
 131     },
 132
 133     .period = { .hertz = 100 },
 134     .try_poll_in = 1,
 135     .try_poll_out = 1,
 136 };
 137
 138 static AudioState glob_audio_state;
 139
 140 const struct mixeng_volume nominal_volume = {
 141     .mute = 0,
 142 #ifdef FLOAT_MIXENG
 143     .r = 1.0,
 144     .l = 1.0,
 145 #else
 146     .r = 1ULL << 32,
 147     .l = 1ULL << 32,
 148 #endif
 149 };
 150
 151 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 152 #error No its not
 153 #else
 154 static void audio_print_options (const char *prefix,
 155                                  struct audio_option *opt);
 156
 157 int audio_bug (const char *funcname, int cond)
 158 {
 159     if (cond) {
 160         static int shown;
 161
 162         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 163         if (!shown) {
 164             struct audio_driver *d;
 165
 166             shown = 1;
 167             AUD_log (NULL, "Save all your work and restart without audio\n");
 168             AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
 169             AUD_log (NULL, "I am sorry\n");
 170             d = glob_audio_state.drv;
 171             if (d) {
 172                 audio_print_options (d->name, d->options);
 173             }
 174         }
 175         AUD_log (NULL, "Context:\n");
 176
 177 #if defined AUDIO_BREAKPOINT_ON_BUG
 178 #  if defined HOST_I386
 179 #    if defined __GNUC__
 180         __asm__ ("int3");
 181 #    elif defined _MSC_VER
 182         _asm _emit 0xcc;
 183 #    else
 184         abort ();
 185 #    endif
 186 #  else
 187         abort ();
 188 #  endif
 189 #endif
 190     }
 191
 192     return cond;
 193 }
 194 #endif
 195
 196 static inline int audio_bits_to_index (int bits)
 197 {
 198     switch (bits) {
 199     case 8:
 200         return 0;
 201
 202     case 16:
 203         return 1;
 204
 205     case 32:
 206         return 2;
 207
 208     default:
 209         audio_bug ("bits_to_index", 1);
 210         AUD_log (NULL, "invalid bits %d\n", bits);
 211         return 0;
 212     }
 213 }
 214
 215 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 216 {
 217     int cond;
 218     size_t len;
 219
 220     len = nmemb * size;
 221     cond = !nmemb || !size;
 222     cond |= nmemb < 0;
 223     cond |= len < size;
 224
 225     if (audio_bug ("audio_calloc", cond)) {
 226         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 227                  funcname);
 228         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 229         return NULL;
 230     }
 231
 232     return g_malloc0 (len);
 233 }
 234
 235 static char *audio_alloc_prefix (const char *s)
 236 {
 237     const char qemu_prefix[] = "QEMU_";
 238     size_t len, i;
 239     char *r, *u;
 240
 241     if (!s) {
 242         return NULL;
 243     }
 244
 245     len = strlen (s);
 246     r = g_malloc (len + sizeof (qemu_prefix));
 247
 248     u = r + sizeof (qemu_prefix) - 1;
 249
 250     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 251     pstrcat (r, len + sizeof (qemu_prefix), s);
 252
 253     for (i = 0; i < len; ++i) {
 254         u[i] = qemu_toupper(u[i]);
 255     }
 256
 257     return r;
 258 }
 259
 260 static const char *audio_audfmt_to_string (audfmt_e fmt)
 261 {
 262     switch (fmt) {
 263     case AUD_FMT_U8:
 264         return "U8";
 265
 266     case AUD_FMT_U16:
 267         return "U16";
 268
 269     case AUD_FMT_S8:
 270         return "S8";
 271
 272     case AUD_FMT_S16:
 273         return "S16";
 274
 275     case AUD_FMT_U32:
 276         return "U32";
 277
 278     case AUD_FMT_S32:
 279         return "S32";
 280     }
 281
 282     dolog ("Bogus audfmt %d returning S16\n", fmt);
 283     return "S16";
 284 }
 285
 286 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 287                                         int *defaultp)
 288 {
 289     if (!strcasecmp (s, "u8")) {
 290         *defaultp = 0;
 291         return AUD_FMT_U8;
 292     }
 293     else if (!strcasecmp (s, "u16")) {
 294         *defaultp = 0;
 295         return AUD_FMT_U16;
 296     }
 297     else if (!strcasecmp (s, "u32")) {
 298         *defaultp = 0;
 299         return AUD_FMT_U32;
 300     }
 301     else if (!strcasecmp (s, "s8")) {
 302         *defaultp = 0;
 303         return AUD_FMT_S8;
 304     }
 305     else if (!strcasecmp (s, "s16")) {
 306         *defaultp = 0;
 307         return AUD_FMT_S16;
 308     }
 309     else if (!strcasecmp (s, "s32")) {
 310         *defaultp = 0;
 311         return AUD_FMT_S32;
 312     }
 313     else {
 314         dolog ("Bogus audio format `%s' using %s\n",
 315                s, audio_audfmt_to_string (defval));
 316         *defaultp = 1;
 317         return defval;
 318     }
 319 }
 320
 321 static audfmt_e audio_get_conf_fmt (const char *envname,
 322                                     audfmt_e defval,
 323                                     int *defaultp)
 324 {
 325     const char *var = getenv (envname);
 326     if (!var) {
 327         *defaultp = 1;
 328         return defval;
 329     }
 330     return audio_string_to_audfmt (var, defval, defaultp);
 331 }
 332
 333 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 334 {
 335     int val;
 336     char *strval;
 337
 338     strval = getenv (key);
 339     if (strval && !qemu_strtoi(strval, NULL, 10, &val)) {
 340         *defaultp = 0;
 341         return val;
 342     }
 343     else {
 344         *defaultp = 1;
 345         return defval;
 346     }
 347 }
 348
 349 static const char *audio_get_conf_str (const char *key,
 350                                        const char *defval,
 351                                        int *defaultp)
 352 {
 353     const char *val = getenv (key);
 354     if (!val) {
 355         *defaultp = 1;
 356         return defval;
 357     }
 358     else {
 359         *defaultp = 0;
 360         return val;
 361     }
 362 }
 363
 364 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 365 {
 366     if (cap) {
 367         fprintf(stderr, "%s: ", cap);
 368     }
 369
 370     vfprintf(stderr, fmt, ap);
 371 }
 372
 373 void AUD_log (const char *cap, const char *fmt, ...)
 374 {
 375     va_list ap;
 376
 377     va_start (ap, fmt);
 378     AUD_vlog (cap, fmt, ap);
 379     va_end (ap);
 380 }
 381
 382 static void audio_print_options (const char *prefix,
 383                                  struct audio_option *opt)
 384 {
 385     char *uprefix;
 386
 387     if (!prefix) {
 388         dolog ("No prefix specified\n");
 389         return;
 390     }
 391
 392     if (!opt) {
 393         dolog ("No options\n");
 394         return;
 395     }
 396
 397     uprefix = audio_alloc_prefix (prefix);
 398
 399     for (; opt->name; opt++) {
 400         const char *state = "default";
 401         printf ("  %s_%s: ", uprefix, opt->name);
 402
 403         if (opt->overriddenp && *opt->overriddenp) {
 404             state = "current";
 405         }
 406
 407         switch (opt->tag) {
 408         case AUD_OPT_BOOL:
 409             {
 410                 int *intp = opt->valp;
 411                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 412             }
 413             break;
 414
 415         case AUD_OPT_INT:
 416             {
 417                 int *intp = opt->valp;
 418                 printf ("integer, %s = %d\n", state, *intp);
 419             }
 420             break;
 421
 422         case AUD_OPT_FMT:
 423             {
 424                 audfmt_e *fmtp = opt->valp;
 425                 printf (
 426                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 427                     state,
 428                     audio_audfmt_to_string (*fmtp)
 429                     );
 430             }
 431             break;
 432
 433         case AUD_OPT_STR:
 434             {
 435                 const char **strp = opt->valp;
 436                 printf ("string, %s = %s\n",
 437                         state,
 438                         *strp ? *strp : "(not set)");
 439             }
 440             break;
 441
 442         default:
 443             printf ("???\n");
 444             dolog ("Bad value tag for option %s_%s %d\n",
 445                    uprefix, opt->name, opt->tag);
 446             break;
 447         }
 448         printf ("    %s\n", opt->descr);
 449     }
 450
 451     g_free (uprefix);
 452 }
 453
 454 static void audio_process_options (const char *prefix,
 455                                    struct audio_option *opt)
 456 {
 457     char *optname;
 458     const char qemu_prefix[] = "QEMU_";
 459     size_t preflen, optlen;
 460
 461     if (audio_bug(__func__, !prefix)) {
 462         dolog ("prefix = NULL\n");
 463         return;
 464     }
 465
 466     if (audio_bug(__func__, !opt)) {
 467         dolog ("opt = NULL\n");
 468         return;
 469     }
 470
 471     preflen = strlen (prefix);
 472
 473     for (; opt->name; opt++) {
 474         size_t len, i;
 475         int def;
 476
 477         if (!opt->valp) {
 478             dolog ("Option value pointer for `%s' is not set\n",
 479                    opt->name);
 480             continue;
 481         }
 482
 483         len = strlen (opt->name);
 484         /* len of opt->name + len of prefix + size of qemu_prefix
 485          * (includes trailing zero) + zero + underscore (on behalf of
 486          * sizeof) */
 487         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 488         optname = g_malloc (optlen);
 489
 490         pstrcpy (optname, optlen, qemu_prefix);
 491
 492         /* copy while upper-casing, including trailing zero */
 493         for (i = 0; i <= preflen; ++i) {
 494             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 495         }
 496         pstrcat (optname, optlen, "_");
 497         pstrcat (optname, optlen, opt->name);
 498
 499         def = 1;
 500         switch (opt->tag) {
 501         case AUD_OPT_BOOL:
 502         case AUD_OPT_INT:
 503             {
 504                 int *intp = opt->valp;
 505                 *intp = audio_get_conf_int (optname, *intp, &def);
 506             }
 507             break;
 508
 509         case AUD_OPT_FMT:
 510             {
 511                 audfmt_e *fmtp = opt->valp;
 512                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 513             }
 514             break;
 515
 516         case AUD_OPT_STR:
 517             {
 518                 const char **strp = opt->valp;
 519                 *strp = audio_get_conf_str (optname, *strp, &def);
 520             }
 521             break;
 522
 523         default:
 524             dolog ("Bad value tag for option `%s' - %d\n",
 525                    optname, opt->tag);
 526             break;
 527         }
 528
 529         if (!opt->overriddenp) {
 530             opt->overriddenp = &opt->overridden;
 531         }
 532         *opt->overriddenp = !def;
 533         g_free (optname);
 534     }
 535 }
 536
 537 static void audio_print_settings (struct audsettings *as)
 538 {
 539     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 540
 541     switch (as->fmt) {
 542     case AUD_FMT_S8:
 543         AUD_log (NULL, "S8");
 544         break;
 545     case AUD_FMT_U8:
 546         AUD_log (NULL, "U8");
 547         break;
 548     case AUD_FMT_S16:
 549         AUD_log (NULL, "S16");
 550         break;
 551     case AUD_FMT_U16:
 552         AUD_log (NULL, "U16");
 553         break;
 554     case AUD_FMT_S32:
 555         AUD_log (NULL, "S32");
 556         break;
 557     case AUD_FMT_U32:
 558         AUD_log (NULL, "U32");
 559         break;
 560     default:
 561         AUD_log (NULL, "invalid(%d)", as->fmt);
 562         break;
 563     }
 564
 565     AUD_log (NULL, " endianness=");
 566     switch (as->endianness) {
 567     case 0:
 568         AUD_log (NULL, "little");
 569         break;
 570     case 1:
 571         AUD_log (NULL, "big");
 572         break;
 573     default:
 574         AUD_log (NULL, "invalid");
 575         break;
 576     }
 577     AUD_log (NULL, "\n");
 578 }
 579
 580 static int audio_validate_settings (struct audsettings *as)
 581 {
 582     int invalid;
 583
 584     invalid = as->nchannels != 1 && as->nchannels != 2;
 585     invalid |= as->endianness != 0 && as->endianness != 1;
 586
 587     switch (as->fmt) {
 588     case AUD_FMT_S8:
 589     case AUD_FMT_U8:
 590     case AUD_FMT_S16:
 591     case AUD_FMT_U16:
 592     case AUD_FMT_S32:
 593     case AUD_FMT_U32:
 594         break;
 595     default:
 596         invalid = 1;
 597         break;
 598     }
 599
 600     invalid |= as->freq <= 0;
 601     return invalid ? -1 : 0;
 602 }
 603
 604 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 605 {
 606     int bits = 8, sign = 0;
 607
 608     switch (as->fmt) {
 609     case AUD_FMT_S8:
 610         sign = 1;
 611         /* fall through */
 612     case AUD_FMT_U8:
 613         break;
 614
 615     case AUD_FMT_S16:
 616         sign = 1;
 617         /* fall through */
 618     case AUD_FMT_U16:
 619         bits = 16;
 620         break;
 621
 622     case AUD_FMT_S32:
 623         sign = 1;
 624         /* fall through */
 625     case AUD_FMT_U32:
 626         bits = 32;
 627         break;
 628     }
 629     return info->freq == as->freq
 630         && info->nchannels == as->nchannels
 631         && info->sign == sign
 632         && info->bits == bits
 633         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 634 }
 635
 636 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 637 {
 638     int bits = 8, sign = 0, shift = 0;
 639
 640     switch (as->fmt) {
 641     case AUD_FMT_S8:
 642         sign = 1;
 643     case AUD_FMT_U8:
 644         break;
 645
 646     case AUD_FMT_S16:
 647         sign = 1;
 648     case AUD_FMT_U16:
 649         bits = 16;
 650         shift = 1;
 651         break;
 652
 653     case AUD_FMT_S32:
 654         sign = 1;
 655     case AUD_FMT_U32:
 656         bits = 32;
 657         shift = 2;
 658         break;
 659     }
 660
 661     info->freq = as->freq;
 662     info->bits = bits;
 663     info->sign = sign;
 664     info->nchannels = as->nchannels;
 665     info->shift = (as->nchannels == 2) + shift;
 666     info->align = (1 << info->shift) - 1;
 667     info->bytes_per_second = info->freq << info->shift;
 668     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 669 }
 670
 671 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 672 {
 673     if (!len) {
 674         return;
 675     }
 676
 677     if (info->sign) {
 678         memset (buf, 0x00, len << info->shift);
 679     }
 680     else {
 681         switch (info->bits) {
 682         case 8:
 683             memset (buf, 0x80, len << info->shift);
 684             break;
 685
 686         case 16:
 687             {
 688                 int i;
 689                 uint16_t *p = buf;
 690                 int shift = info->nchannels - 1;
 691                 short s = INT16_MAX;
 692
 693                 if (info->swap_endianness) {
 694                     s = bswap16 (s);
 695                 }
 696
 697                 for (i = 0; i < len << shift; i++) {
 698                     p[i] = s;
 699                 }
 700             }
 701             break;
 702
 703         case 32:
 704             {
 705                 int i;
 706                 uint32_t *p = buf;
 707                 int shift = info->nchannels - 1;
 708                 int32_t s = INT32_MAX;
 709
 710                 if (info->swap_endianness) {
 711                     s = bswap32 (s);
 712                 }
 713
 714                 for (i = 0; i < len << shift; i++) {
 715                     p[i] = s;
 716                 }
 717             }
 718             break;
 719
 720         default:
 721             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 722                      info->bits);
 723             break;
 724         }
 725     }
 726 }
 727
 728 /*
 729  * Capture
 730  */
 731 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 732 {
 733     (void) src;
 734     (void) dst;
 735     (void) samples;
 736 }
 737
 738 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 739     struct audsettings *as
 740     )
 741 {
 742     CaptureVoiceOut *cap;
 743     AudioState *s = &glob_audio_state;
 744
 745     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 746         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 747             return cap;
 748         }
 749     }
 750     return NULL;
 751 }
 752
 753 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 754 {
 755     struct capture_callback *cb;
 756
 757 #ifdef DEBUG_CAPTURE
 758     dolog ("notification %d sent\n", cmd);
 759 #endif
 760     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 761         cb->ops.notify (cb->opaque, cmd);
 762     }
 763 }
 764
 765 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 766 {
 767     if (cap->hw.enabled != enabled) {
 768         audcnotification_e cmd;
 769         cap->hw.enabled = enabled;
 770         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 771         audio_notify_capture (cap, cmd);
 772     }
 773 }
 774
 775 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 776 {
 777     HWVoiceOut *hw = &cap->hw;
 778     SWVoiceOut *sw;
 779     int enabled = 0;
 780
 781     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 782         if (sw->active) {
 783             enabled = 1;
 784             break;
 785         }
 786     }
 787     audio_capture_maybe_changed (cap, enabled);
 788 }
 789
 790 static void audio_detach_capture (HWVoiceOut *hw)
 791 {
 792     SWVoiceCap *sc = hw->cap_head.lh_first;
 793
 794     while (sc) {
 795         SWVoiceCap *sc1 = sc->entries.le_next;
 796         SWVoiceOut *sw = &sc->sw;
 797         CaptureVoiceOut *cap = sc->cap;
 798         int was_active = sw->active;
 799
 800         if (sw->rate) {
 801             st_rate_stop (sw->rate);
 802             sw->rate = NULL;
 803         }
 804
 805         QLIST_REMOVE (sw, entries);
 806         QLIST_REMOVE (sc, entries);
 807         g_free (sc);
 808         if (was_active) {
 809             /* We have removed soft voice from the capture:
 810                this might have changed the overall status of the capture
 811                since this might have been the only active voice */
 812             audio_recalc_and_notify_capture (cap);
 813         }
 814         sc = sc1;
 815     }
 816 }
 817
 818 static int audio_attach_capture (HWVoiceOut *hw)
 819 {
 820     AudioState *s = &glob_audio_state;
 821     CaptureVoiceOut *cap;
 822
 823     audio_detach_capture (hw);
 824     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 825         SWVoiceCap *sc;
 826         SWVoiceOut *sw;
 827         HWVoiceOut *hw_cap = &cap->hw;
 828
 829         sc = audio_calloc(__func__, 1, sizeof(*sc));
 830         if (!sc) {
 831             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 832                    sizeof (*sc));
 833             return -1;
 834         }
 835
 836         sc->cap = cap;
 837         sw = &sc->sw;
 838         sw->hw = hw_cap;
 839         sw->info = hw->info;
 840         sw->empty = 1;
 841         sw->active = hw->enabled;
 842         sw->conv = noop_conv;
 843         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 844         sw->vol = nominal_volume;
 845         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 846         if (!sw->rate) {
 847             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 848             g_free (sw);
 849             return -1;
 850         }
 851         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 852         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 853 #ifdef DEBUG_CAPTURE
 854         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 855                                     hw, sw->info.freq, sw->info.bits,
 856                                     sw->info.nchannels);
 857         dolog ("Added %s active = %d\n", sw->name, sw->active);
 858 #endif
 859         if (sw->active) {
 860             audio_capture_maybe_changed (cap, 1);
 861         }
 862     }
 863     return 0;
 864 }
 865
 866 /*
 867  * Hard voice (capture)
 868  */
 869 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 870 {
 871     SWVoiceIn *sw;
 872     int m = hw->total_samples_captured;
 873
 874     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 875         if (sw->active) {
 876             m = audio_MIN (m, sw->total_hw_samples_acquired);
 877         }
 878     }
 879     return m;
 880 }
 881
 882 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 883 {
 884     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 885     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 886         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 887         return 0;
 888     }
 889     return live;
 890 }
 891
 892 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 893                            int live, int pending)
 894 {
 895     int left = hw->samples - pending;
 896     int len = audio_MIN (left, live);
 897     int clipped = 0;
 898
 899     while (len) {
 900         struct st_sample *src = hw->mix_buf + hw->rpos;
 901         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 902         int samples_till_end_of_buf = hw->samples - hw->rpos;
 903         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 904
 905         hw->clip (dst, src, samples_to_clip);
 906
 907         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 908         len -= samples_to_clip;
 909         clipped += samples_to_clip;
 910     }
 911     return clipped;
 912 }
 913
 914 /*
 915  * Soft voice (capture)
 916  */
 917 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 918 {
 919     HWVoiceIn *hw = sw->hw;
 920     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 921     int rpos;
 922
 923     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 924         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 925         return 0;
 926     }
 927
 928     rpos = hw->wpos - live;
 929     if (rpos >= 0) {
 930         return rpos;
 931     }
 932     else {
 933         return hw->samples + rpos;
 934     }
 935 }
 936
 937 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 938 {
 939     HWVoiceIn *hw = sw->hw;
 940     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 941     struct st_sample *src, *dst = sw->buf;
 942
 943     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 944
 945     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 946     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 947         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 948         return 0;
 949     }
 950
 951     samples = size >> sw->info.shift;
 952     if (!live) {
 953         return 0;
 954     }
 955
 956     swlim = (live * sw->ratio) >> 32;
 957     swlim = audio_MIN (swlim, samples);
 958
 959     while (swlim) {
 960         src = hw->conv_buf + rpos;
 961         isamp = hw->wpos - rpos;
 962         /* XXX: <= ? */
 963         if (isamp <= 0) {
 964             isamp = hw->samples - rpos;
 965         }
 966
 967         if (!isamp) {
 968             break;
 969         }
 970         osamp = swlim;
 971
 972         if (audio_bug(__func__, osamp < 0)) {
 973             dolog ("osamp=%d\n", osamp);
 974             return 0;
 975         }
 976
 977         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 978         swlim -= osamp;
 979         rpos = (rpos + isamp) % hw->samples;
 980         dst += osamp;
 981         ret += osamp;
 982         total += isamp;
 983     }
 984
 985     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 986         mixeng_volume (sw->buf, ret, &sw->vol);
 987     }
 988
 989     sw->clip (buf, sw->buf, ret);
 990     sw->total_hw_samples_acquired += total;
 991     return ret << sw->info.shift;
 992 }
 993
 994 /*
 995  * Hard voice (playback)
 996  */
 997 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 998 {
 999     SWVoiceOut *sw;
1000     int m = INT_MAX;
1001     int nb_live = 0;
1002
1003     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1004         if (sw->active || !sw->empty) {
1005             m = audio_MIN (m, sw->total_hw_samples_mixed);
1006             nb_live += 1;
1007         }
1008     }
1009
1010     *nb_livep = nb_live;
1011     return m;
1012 }
1013
1014 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
1015 {
1016     int smin;
1017     int nb_live1;
1018
1019     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
1020     if (nb_live) {
1021         *nb_live = nb_live1;
1022     }
1023
1024     if (nb_live1) {
1025         int live = smin;
1026
1027         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1028             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1029             return 0;
1030         }
1031         return live;
1032     }
1033     return 0;
1034 }
1035
1036 /*
1037  * Soft voice (playback)
1038  */
1039 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1040 {
1041     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1042     int ret = 0, pos = 0, total = 0;
1043
1044     if (!sw) {
1045         return size;
1046     }
1047
1048     hwsamples = sw->hw->samples;
1049
1050     live = sw->total_hw_samples_mixed;
1051     if (audio_bug(__func__, live < 0 || live > hwsamples)) {
1052         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1053         return 0;
1054     }
1055
1056     if (live == hwsamples) {
1057 #ifdef DEBUG_OUT
1058         dolog ("%s is full %d\n", sw->name, live);
1059 #endif
1060         return 0;
1061     }
1062
1063     wpos = (sw->hw->rpos + live) % hwsamples;
1064     samples = size >> sw->info.shift;
1065
1066     dead = hwsamples - live;
1067     swlim = ((int64_t) dead << 32) / sw->ratio;
1068     swlim = audio_MIN (swlim, samples);
1069     if (swlim) {
1070         sw->conv (sw->buf, buf, swlim);
1071
1072         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1073             mixeng_volume (sw->buf, swlim, &sw->vol);
1074         }
1075     }
1076
1077     while (swlim) {
1078         dead = hwsamples - live;
1079         left = hwsamples - wpos;
1080         blck = audio_MIN (dead, left);
1081         if (!blck) {
1082             break;
1083         }
1084         isamp = swlim;
1085         osamp = blck;
1086         st_rate_flow_mix (
1087             sw->rate,
1088             sw->buf + pos,
1089             sw->hw->mix_buf + wpos,
1090             &isamp,
1091             &osamp
1092             );
1093         ret += isamp;
1094         swlim -= isamp;
1095         pos += isamp;
1096         live += osamp;
1097         wpos = (wpos + osamp) % hwsamples;
1098         total += osamp;
1099     }
1100
1101     sw->total_hw_samples_mixed += total;
1102     sw->empty = sw->total_hw_samples_mixed == 0;
1103
1104 #ifdef DEBUG_OUT
1105     dolog (
1106         "%s: write size %d ret %d total sw %d\n",
1107         SW_NAME (sw),
1108         size >> sw->info.shift,
1109         ret,
1110         sw->total_hw_samples_mixed
1111         );
1112 #endif
1113
1114     return ret << sw->info.shift;
1115 }
1116
1117 #ifdef DEBUG_AUDIO
1118 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1119 {
1120     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1121            cap, info->bits, info->sign, info->freq, info->nchannels);
1122 }
1123 #endif
1124
1125 #define DAC
1126 #include "audio_template.h"
1127 #undef DAC
1128 #include "audio_template.h"
1129
1130 /*
1131  * Timer
1132  */
1133
1134 static bool audio_timer_running;
1135 static uint64_t audio_timer_last;
1136
1137 static int audio_is_timer_needed (void)
1138 {
1139     HWVoiceIn *hwi = NULL;
1140     HWVoiceOut *hwo = NULL;
1141
1142     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1143         if (!hwo->poll_mode) return 1;
1144     }
1145     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1146         if (!hwi->poll_mode) return 1;
1147     }
1148     return 0;
1149 }
1150
1151 static void audio_reset_timer (AudioState *s)
1152 {
1153     if (audio_is_timer_needed ()) {
1154         timer_mod_anticipate_ns(s->ts,
1155             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
1156         if (!audio_timer_running) {
1157             audio_timer_running = true;
1158             audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1159             trace_audio_timer_start(conf.period.ticks / SCALE_MS);
1160         }
1161     } else {
1162         timer_del(s->ts);
1163         if (audio_timer_running) {
1164             audio_timer_running = false;
1165             trace_audio_timer_stop();
1166         }
1167     }
1168 }
1169
1170 static void audio_timer (void *opaque)
1171 {
1172     int64_t now, diff;
1173
1174     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1175     diff = now - audio_timer_last;
1176     if (diff > conf.period.ticks * 3 / 2) {
1177         trace_audio_timer_delayed(diff / SCALE_MS);
1178     }
1179     audio_timer_last = now;
1180
1181     audio_run ("timer");
1182     audio_reset_timer (opaque);
1183 }
1184
1185 /*
1186  * Public API
1187  */
1188 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1189 {
1190     if (!sw) {
1191         /* XXX: Consider options */
1192         return size;
1193     }
1194
1195     if (!sw->hw->enabled) {
1196         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1197         return 0;
1198     }
1199
1200     return sw->hw->pcm_ops->write(sw, buf, size);
1201 }
1202
1203 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1204 {
1205     if (!sw) {
1206         /* XXX: Consider options */
1207         return size;
1208     }
1209
1210     if (!sw->hw->enabled) {
1211         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1212         return 0;
1213     }
1214
1215     return sw->hw->pcm_ops->read(sw, buf, size);
1216 }
1217
1218 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1219 {
1220     return sw->hw->samples << sw->hw->info.shift;
1221 }
1222
1223 void AUD_set_active_out (SWVoiceOut *sw, int on)
1224 {
1225     HWVoiceOut *hw;
1226
1227     if (!sw) {
1228         return;
1229     }
1230
1231     hw = sw->hw;
1232     if (sw->active != on) {
1233         AudioState *s = &glob_audio_state;
1234         SWVoiceOut *temp_sw;
1235         SWVoiceCap *sc;
1236
1237         if (on) {
1238             hw->pending_disable = 0;
1239             if (!hw->enabled) {
1240                 hw->enabled = 1;
1241                 if (s->vm_running) {
1242                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1243                     audio_reset_timer (s);
1244                 }
1245             }
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                 hw->pending_disable = nb_active == 1;
1257             }
1258         }
1259
1260         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1261             sc->sw.active = hw->enabled;
1262             if (hw->enabled) {
1263                 audio_capture_maybe_changed (sc->cap, 1);
1264             }
1265         }
1266         sw->active = on;
1267     }
1268 }
1269
1270 void AUD_set_active_in (SWVoiceIn *sw, int on)
1271 {
1272     HWVoiceIn *hw;
1273
1274     if (!sw) {
1275         return;
1276     }
1277
1278     hw = sw->hw;
1279     if (sw->active != on) {
1280         AudioState *s = &glob_audio_state;
1281         SWVoiceIn *temp_sw;
1282
1283         if (on) {
1284             if (!hw->enabled) {
1285                 hw->enabled = 1;
1286                 if (s->vm_running) {
1287                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1288                     audio_reset_timer (s);
1289                 }
1290             }
1291             sw->total_hw_samples_acquired = hw->total_samples_captured;
1292         }
1293         else {
1294             if (hw->enabled) {
1295                 int nb_active = 0;
1296
1297                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1298                      temp_sw = temp_sw->entries.le_next) {
1299                     nb_active += temp_sw->active != 0;
1300                 }
1301
1302                 if (nb_active == 1) {
1303                     hw->enabled = 0;
1304                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1305                 }
1306             }
1307         }
1308         sw->active = on;
1309     }
1310 }
1311
1312 static int audio_get_avail (SWVoiceIn *sw)
1313 {
1314     int live;
1315
1316     if (!sw) {
1317         return 0;
1318     }
1319
1320     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1321     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1322         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1323         return 0;
1324     }
1325
1326     ldebug (
1327         "%s: get_avail live %d ret %" PRId64 "\n",
1328         SW_NAME (sw),
1329         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1330         );
1331
1332     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1333 }
1334
1335 static int audio_get_free (SWVoiceOut *sw)
1336 {
1337     int live, dead;
1338
1339     if (!sw) {
1340         return 0;
1341     }
1342
1343     live = sw->total_hw_samples_mixed;
1344
1345     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1346         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1347         return 0;
1348     }
1349
1350     dead = sw->hw->samples - live;
1351
1352 #ifdef DEBUG_OUT
1353     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1354            SW_NAME (sw),
1355            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1356 #endif
1357
1358     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1359 }
1360
1361 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1362 {
1363     int n;
1364
1365     if (hw->enabled) {
1366         SWVoiceCap *sc;
1367
1368         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1369             SWVoiceOut *sw = &sc->sw;
1370             int rpos2 = rpos;
1371
1372             n = samples;
1373             while (n) {
1374                 int till_end_of_hw = hw->samples - rpos2;
1375                 int to_write = audio_MIN (till_end_of_hw, n);
1376                 int bytes = to_write << hw->info.shift;
1377                 int written;
1378
1379                 sw->buf = hw->mix_buf + rpos2;
1380                 written = audio_pcm_sw_write (sw, NULL, bytes);
1381                 if (written - bytes) {
1382                     dolog ("Could not mix %d bytes into a capture "
1383                            "buffer, mixed %d\n",
1384                            bytes, written);
1385                     break;
1386                 }
1387                 n -= to_write;
1388                 rpos2 = (rpos2 + to_write) % hw->samples;
1389             }
1390         }
1391     }
1392
1393     n = audio_MIN (samples, hw->samples - rpos);
1394     mixeng_clear (hw->mix_buf + rpos, n);
1395     mixeng_clear (hw->mix_buf, samples - n);
1396 }
1397
1398 static void audio_run_out (AudioState *s)
1399 {
1400     HWVoiceOut *hw = NULL;
1401     SWVoiceOut *sw;
1402
1403     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1404         int played;
1405         int live, free, nb_live, cleanup_required, prev_rpos;
1406
1407         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1408         if (!nb_live) {
1409             live = 0;
1410         }
1411
1412         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1413             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1414             continue;
1415         }
1416
1417         if (hw->pending_disable && !nb_live) {
1418             SWVoiceCap *sc;
1419 #ifdef DEBUG_OUT
1420             dolog ("Disabling voice\n");
1421 #endif
1422             hw->enabled = 0;
1423             hw->pending_disable = 0;
1424             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1425             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1426                 sc->sw.active = 0;
1427                 audio_recalc_and_notify_capture (sc->cap);
1428             }
1429             continue;
1430         }
1431
1432         if (!live) {
1433             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
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             continue;
1442         }
1443
1444         prev_rpos = hw->rpos;
1445         played = hw->pcm_ops->run_out (hw, live);
1446         replay_audio_out(&played);
1447         if (audio_bug(__func__, hw->rpos >= hw->samples)) {
1448             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1449                    hw->rpos, hw->samples, played);
1450             hw->rpos = 0;
1451         }
1452
1453 #ifdef DEBUG_OUT
1454         dolog ("played=%d\n", played);
1455 #endif
1456
1457         if (played) {
1458             hw->ts_helper += played;
1459             audio_capture_mix_and_clear (hw, prev_rpos, played);
1460         }
1461
1462         cleanup_required = 0;
1463         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1464             if (!sw->active && sw->empty) {
1465                 continue;
1466             }
1467
1468             if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1469                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1470                        played, sw->total_hw_samples_mixed);
1471                 played = sw->total_hw_samples_mixed;
1472             }
1473
1474             sw->total_hw_samples_mixed -= played;
1475
1476             if (!sw->total_hw_samples_mixed) {
1477                 sw->empty = 1;
1478                 cleanup_required |= !sw->active && !sw->callback.fn;
1479             }
1480
1481             if (sw->active) {
1482                 free = audio_get_free (sw);
1483                 if (free > 0) {
1484                     sw->callback.fn (sw->callback.opaque, free);
1485                 }
1486             }
1487         }
1488
1489         if (cleanup_required) {
1490             SWVoiceOut *sw1;
1491
1492             sw = hw->sw_head.lh_first;
1493             while (sw) {
1494                 sw1 = sw->entries.le_next;
1495                 if (!sw->active && !sw->callback.fn) {
1496                     audio_close_out (sw);
1497                 }
1498                 sw = sw1;
1499             }
1500         }
1501     }
1502 }
1503
1504 static void audio_run_in (AudioState *s)
1505 {
1506     HWVoiceIn *hw = NULL;
1507
1508     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1509         SWVoiceIn *sw;
1510         int captured = 0, min;
1511
1512         if (replay_mode != REPLAY_MODE_PLAY) {
1513             captured = hw->pcm_ops->run_in(hw);
1514         }
1515         replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
1516
1517         min = audio_pcm_hw_find_min_in (hw);
1518         hw->total_samples_captured += captured - min;
1519         hw->ts_helper += captured;
1520
1521         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1522             sw->total_hw_samples_acquired -= min;
1523
1524             if (sw->active) {
1525                 int avail;
1526
1527                 avail = audio_get_avail (sw);
1528                 if (avail > 0) {
1529                     sw->callback.fn (sw->callback.opaque, avail);
1530                 }
1531             }
1532         }
1533     }
1534 }
1535
1536 static void audio_run_capture (AudioState *s)
1537 {
1538     CaptureVoiceOut *cap;
1539
1540     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1541         int live, rpos, captured;
1542         HWVoiceOut *hw = &cap->hw;
1543         SWVoiceOut *sw;
1544
1545         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1546         rpos = hw->rpos;
1547         while (live) {
1548             int left = hw->samples - rpos;
1549             int to_capture = audio_MIN (live, left);
1550             struct st_sample *src;
1551             struct capture_callback *cb;
1552
1553             src = hw->mix_buf + rpos;
1554             hw->clip (cap->buf, src, to_capture);
1555             mixeng_clear (src, to_capture);
1556
1557             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1558                 cb->ops.capture (cb->opaque, cap->buf,
1559                                  to_capture << hw->info.shift);
1560             }
1561             rpos = (rpos + to_capture) % hw->samples;
1562             live -= to_capture;
1563         }
1564         hw->rpos = rpos;
1565
1566         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1567             if (!sw->active && sw->empty) {
1568                 continue;
1569             }
1570
1571             if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1572                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1573                        captured, sw->total_hw_samples_mixed);
1574                 captured = sw->total_hw_samples_mixed;
1575             }
1576
1577             sw->total_hw_samples_mixed -= captured;
1578             sw->empty = sw->total_hw_samples_mixed == 0;
1579         }
1580     }
1581 }
1582
1583 void audio_run (const char *msg)
1584 {
1585     AudioState *s = &glob_audio_state;
1586
1587     audio_run_out (s);
1588     audio_run_in (s);
1589     audio_run_capture (s);
1590 #ifdef DEBUG_POLL
1591     {
1592         static double prevtime;
1593         double currtime;
1594         struct timeval tv;
1595
1596         if (gettimeofday (&tv, NULL)) {
1597             perror ("audio_run: gettimeofday");
1598             return;
1599         }
1600
1601         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1602         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1603         prevtime = currtime;
1604     }
1605 #endif
1606 }
1607
1608 static struct audio_option audio_options[] = {
1609     /* DAC */
1610     {
1611         .name  = "DAC_FIXED_SETTINGS",
1612         .tag   = AUD_OPT_BOOL,
1613         .valp  = &conf.fixed_out.enabled,
1614         .descr = "Use fixed settings for host DAC"
1615     },
1616     {
1617         .name  = "DAC_FIXED_FREQ",
1618         .tag   = AUD_OPT_INT,
1619         .valp  = &conf.fixed_out.settings.freq,
1620         .descr = "Frequency for fixed host DAC"
1621     },
1622     {
1623         .name  = "DAC_FIXED_FMT",
1624         .tag   = AUD_OPT_FMT,
1625         .valp  = &conf.fixed_out.settings.fmt,
1626         .descr = "Format for fixed host DAC"
1627     },
1628     {
1629         .name  = "DAC_FIXED_CHANNELS",
1630         .tag   = AUD_OPT_INT,
1631         .valp  = &conf.fixed_out.settings.nchannels,
1632         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1633     },
1634     {
1635         .name  = "DAC_VOICES",
1636         .tag   = AUD_OPT_INT,
1637         .valp  = &conf.fixed_out.nb_voices,
1638         .descr = "Number of voices for DAC"
1639     },
1640     {
1641         .name  = "DAC_TRY_POLL",
1642         .tag   = AUD_OPT_BOOL,
1643         .valp  = &conf.try_poll_out,
1644         .descr = "Attempt using poll mode for DAC"
1645     },
1646     /* ADC */
1647     {
1648         .name  = "ADC_FIXED_SETTINGS",
1649         .tag   = AUD_OPT_BOOL,
1650         .valp  = &conf.fixed_in.enabled,
1651         .descr = "Use fixed settings for host ADC"
1652     },
1653     {
1654         .name  = "ADC_FIXED_FREQ",
1655         .tag   = AUD_OPT_INT,
1656         .valp  = &conf.fixed_in.settings.freq,
1657         .descr = "Frequency for fixed host ADC"
1658     },
1659     {
1660         .name  = "ADC_FIXED_FMT",
1661         .tag   = AUD_OPT_FMT,
1662         .valp  = &conf.fixed_in.settings.fmt,
1663         .descr = "Format for fixed host ADC"
1664     },
1665     {
1666         .name  = "ADC_FIXED_CHANNELS",
1667         .tag   = AUD_OPT_INT,
1668         .valp  = &conf.fixed_in.settings.nchannels,
1669         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1670     },
1671     {
1672         .name  = "ADC_VOICES",
1673         .tag   = AUD_OPT_INT,
1674         .valp  = &conf.fixed_in.nb_voices,
1675         .descr = "Number of voices for ADC"
1676     },
1677     {
1678         .name  = "ADC_TRY_POLL",
1679         .tag   = AUD_OPT_BOOL,
1680         .valp  = &conf.try_poll_in,
1681         .descr = "Attempt using poll mode for ADC"
1682     },
1683     /* Misc */
1684     {
1685         .name  = "TIMER_PERIOD",
1686         .tag   = AUD_OPT_INT,
1687         .valp  = &conf.period.hertz,
1688         .descr = "Timer period in HZ (0 - use lowest possible)"
1689     },
1690     { /* End of list */ }
1691 };
1692
1693 static void audio_pp_nb_voices (const char *typ, int nb)
1694 {
1695     switch (nb) {
1696     case 0:
1697         printf ("Does not support %s\n", typ);
1698         break;
1699     case 1:
1700         printf ("One %s voice\n", typ);
1701         break;
1702     case INT_MAX:
1703         printf ("Theoretically supports many %s voices\n", typ);
1704         break;
1705     default:
1706         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1707         break;
1708     }
1709
1710 }
1711
1712 void AUD_help (void)
1713 {
1714     struct audio_driver *d;
1715
1716     /* make sure we print the help text for modular drivers too */
1717     audio_module_load_all();
1718
1719     audio_process_options ("AUDIO", audio_options);
1720     QLIST_FOREACH(d, &audio_drivers, next) {
1721         if (d->options) {
1722             audio_process_options (d->name, d->options);
1723         }
1724     }
1725
1726     printf ("Audio options:\n");
1727     audio_print_options ("AUDIO", audio_options);
1728     printf ("\n");
1729
1730     printf ("Available drivers:\n");
1731
1732     QLIST_FOREACH(d, &audio_drivers, next) {
1733
1734         printf ("Name: %s\n", d->name);
1735         printf ("Description: %s\n", d->descr);
1736
1737         audio_pp_nb_voices ("playback", d->max_voices_out);
1738         audio_pp_nb_voices ("capture", d->max_voices_in);
1739
1740         if (d->options) {
1741             printf ("Options:\n");
1742             audio_print_options (d->name, d->options);
1743         }
1744         else {
1745             printf ("No options\n");
1746         }
1747         printf ("\n");
1748     }
1749
1750     printf (
1751         "Options are settable through environment variables.\n"
1752         "Example:\n"
1753 #ifdef _WIN32
1754         "  set QEMU_AUDIO_DRV=wav\n"
1755         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1756 #else
1757         "  export QEMU_AUDIO_DRV=wav\n"
1758         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1759         "(for csh replace export with setenv in the above)\n"
1760 #endif
1761         "  qemu ...\n\n"
1762         );
1763 }
1764
1765 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1766 {
1767     if (drv->options) {
1768         audio_process_options (drv->name, drv->options);
1769     }
1770     s->drv_opaque = drv->init ();
1771
1772     if (s->drv_opaque) {
1773         audio_init_nb_voices_out (drv);
1774         audio_init_nb_voices_in (drv);
1775         s->drv = drv;
1776         return 0;
1777     }
1778     else {
1779         dolog ("Could not init `%s' audio driver\n", drv->name);
1780         return -1;
1781     }
1782 }
1783
1784 static void audio_vm_change_state_handler (void *opaque, int running,
1785                                            RunState state)
1786 {
1787     AudioState *s = opaque;
1788     HWVoiceOut *hwo = NULL;
1789     HWVoiceIn *hwi = NULL;
1790     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1791
1792     s->vm_running = running;
1793     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1794         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1795     }
1796
1797     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1798         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1799     }
1800     audio_reset_timer (s);
1801 }
1802
1803 static bool is_cleaning_up;
1804
1805 bool audio_is_cleaning_up(void)
1806 {
1807     return is_cleaning_up;
1808 }
1809
1810 void audio_cleanup(void)
1811 {
1812     AudioState *s = &glob_audio_state;
1813     HWVoiceOut *hwo, *hwon;
1814     HWVoiceIn *hwi, *hwin;
1815
1816     is_cleaning_up = true;
1817     QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1818         SWVoiceCap *sc;
1819
1820         if (hwo->enabled) {
1821             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1822         }
1823         hwo->pcm_ops->fini_out (hwo);
1824
1825         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1826             CaptureVoiceOut *cap = sc->cap;
1827             struct capture_callback *cb;
1828
1829             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1830                 cb->ops.destroy (cb->opaque);
1831             }
1832         }
1833         QLIST_REMOVE(hwo, entries);
1834     }
1835
1836     QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1837         if (hwi->enabled) {
1838             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1839         }
1840         hwi->pcm_ops->fini_in (hwi);
1841         QLIST_REMOVE(hwi, entries);
1842     }
1843
1844     if (s->drv) {
1845         s->drv->fini (s->drv_opaque);
1846         s->drv = NULL;
1847     }
1848 }
1849
1850 static const VMStateDescription vmstate_audio = {
1851     .name = "audio",
1852     .version_id = 1,
1853     .minimum_version_id = 1,
1854     .fields = (VMStateField[]) {
1855         VMSTATE_END_OF_LIST()
1856     }
1857 };
1858
1859 static void audio_init (void)
1860 {
1861     size_t i;
1862     int done = 0;
1863     const char *drvname;
1864     VMChangeStateEntry *e;
1865     AudioState *s = &glob_audio_state;
1866     struct audio_driver *driver;
1867
1868     if (s->drv) {
1869         return;
1870     }
1871
1872     QLIST_INIT (&s->hw_head_out);
1873     QLIST_INIT (&s->hw_head_in);
1874     QLIST_INIT (&s->cap_head);
1875     atexit(audio_cleanup);
1876
1877     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1878
1879     audio_process_options ("AUDIO", audio_options);
1880
1881     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1882     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1883
1884     if (s->nb_hw_voices_out <= 0) {
1885         dolog ("Bogus number of playback voices %d, setting to 1\n",
1886                s->nb_hw_voices_out);
1887         s->nb_hw_voices_out = 1;
1888     }
1889
1890     if (s->nb_hw_voices_in <= 0) {
1891         dolog ("Bogus number of capture voices %d, setting to 0\n",
1892                s->nb_hw_voices_in);
1893         s->nb_hw_voices_in = 0;
1894     }
1895
1896     {
1897         int def;
1898         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1899     }
1900
1901     if (drvname) {
1902         driver = audio_driver_lookup(drvname);
1903         if (driver) {
1904             done = !audio_driver_init(s, driver);
1905         } else {
1906             dolog ("Unknown audio driver `%s'\n", drvname);
1907             dolog ("Run with -audio-help to list available drivers\n");
1908         }
1909     }
1910
1911     if (!done) {
1912         for (i = 0; !done && i < ARRAY_SIZE(audio_prio_list); i++) {
1913             driver = audio_driver_lookup(audio_prio_list[i]);
1914             if (driver && driver->can_be_default) {
1915                 done = !audio_driver_init(s, driver);
1916             }
1917         }
1918     }
1919
1920     if (!done) {
1921         driver = audio_driver_lookup("none");
1922         done = !audio_driver_init(s, driver);
1923         assert(done);
1924         dolog("warning: Using timer based audio emulation\n");
1925     }
1926
1927     if (conf.period.hertz <= 0) {
1928         if (conf.period.hertz < 0) {
1929             dolog ("warning: Timer period is negative - %d "
1930                    "treating as zero\n",
1931                    conf.period.hertz);
1932         }
1933         conf.period.ticks = 1;
1934     } else {
1935         conf.period.ticks = NANOSECONDS_PER_SECOND / conf.period.hertz;
1936     }
1937
1938     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1939     if (!e) {
1940         dolog ("warning: Could not register change state handler\n"
1941                "(Audio can continue looping even after stopping the VM)\n");
1942     }
1943
1944     QLIST_INIT (&s->card_head);
1945     vmstate_register (NULL, 0, &vmstate_audio, s);
1946 }
1947
1948 void AUD_register_card (const char *name, QEMUSoundCard *card)
1949 {
1950     audio_init ();
1951     card->name = g_strdup (name);
1952     memset (&card->entries, 0, sizeof (card->entries));
1953     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1954 }
1955
1956 void AUD_remove_card (QEMUSoundCard *card)
1957 {
1958     QLIST_REMOVE (card, entries);
1959     g_free (card->name);
1960 }
1961
1962
1963 CaptureVoiceOut *AUD_add_capture (
1964     struct audsettings *as,
1965     struct audio_capture_ops *ops,
1966     void *cb_opaque
1967     )
1968 {
1969     AudioState *s = &glob_audio_state;
1970     CaptureVoiceOut *cap;
1971     struct capture_callback *cb;
1972
1973     if (audio_validate_settings (as)) {
1974         dolog ("Invalid settings were passed when trying to add capture\n");
1975         audio_print_settings (as);
1976         goto err0;
1977     }
1978
1979     cb = audio_calloc(__func__, 1, sizeof(*cb));
1980     if (!cb) {
1981         dolog ("Could not allocate capture callback information, size %zu\n",
1982                sizeof (*cb));
1983         goto err0;
1984     }
1985     cb->ops = *ops;
1986     cb->opaque = cb_opaque;
1987
1988     cap = audio_pcm_capture_find_specific (as);
1989     if (cap) {
1990         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1991         return cap;
1992     }
1993     else {
1994         HWVoiceOut *hw;
1995         CaptureVoiceOut *cap;
1996
1997         cap = audio_calloc(__func__, 1, sizeof(*cap));
1998         if (!cap) {
1999             dolog ("Could not allocate capture voice, size %zu\n",
2000                    sizeof (*cap));
2001             goto err1;
2002         }
2003
2004         hw = &cap->hw;
2005         QLIST_INIT (&hw->sw_head);
2006         QLIST_INIT (&cap->cb_head);
2007
2008         /* XXX find a more elegant way */
2009         hw->samples = 4096 * 4;
2010         hw->mix_buf = audio_calloc(__func__, hw->samples,
2011                                    sizeof(struct st_sample));
2012         if (!hw->mix_buf) {
2013             dolog ("Could not allocate capture mix buffer (%d samples)\n",
2014                    hw->samples);
2015             goto err2;
2016         }
2017
2018         audio_pcm_init_info (&hw->info, as);
2019
2020         cap->buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
2021         if (!cap->buf) {
2022             dolog ("Could not allocate capture buffer "
2023                    "(%d samples, each %d bytes)\n",
2024                    hw->samples, 1 << hw->info.shift);
2025             goto err3;
2026         }
2027
2028         hw->clip = mixeng_clip
2029             [hw->info.nchannels == 2]
2030             [hw->info.sign]
2031             [hw->info.swap_endianness]
2032             [audio_bits_to_index (hw->info.bits)];
2033
2034         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2035         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2036
2037         QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
2038             audio_attach_capture (hw);
2039         }
2040         return cap;
2041
2042     err3:
2043         g_free (cap->hw.mix_buf);
2044     err2:
2045         g_free (cap);
2046     err1:
2047         g_free (cb);
2048     err0:
2049         return NULL;
2050     }
2051 }
2052
2053 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2054 {
2055     struct capture_callback *cb;
2056
2057     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2058         if (cb->opaque == cb_opaque) {
2059             cb->ops.destroy (cb_opaque);
2060             QLIST_REMOVE (cb, entries);
2061             g_free (cb);
2062
2063             if (!cap->cb_head.lh_first) {
2064                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2065
2066                 while (sw) {
2067                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2068 #ifdef DEBUG_CAPTURE
2069                     dolog ("freeing %s\n", sw->name);
2070 #endif
2071
2072                     sw1 = sw->entries.le_next;
2073                     if (sw->rate) {
2074                         st_rate_stop (sw->rate);
2075                         sw->rate = NULL;
2076                     }
2077                     QLIST_REMOVE (sw, entries);
2078                     QLIST_REMOVE (sc, entries);
2079                     g_free (sc);
2080                     sw = sw1;
2081                 }
2082                 QLIST_REMOVE (cap, entries);
2083                 g_free (cap->hw.mix_buf);
2084                 g_free (cap->buf);
2085                 g_free (cap);
2086             }
2087             return;
2088         }
2089     }
2090 }
2091
2092 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2093 {
2094     if (sw) {
2095         HWVoiceOut *hw = sw->hw;
2096
2097         sw->vol.mute = mute;
2098         sw->vol.l = nominal_volume.l * lvol / 255;
2099         sw->vol.r = nominal_volume.r * rvol / 255;
2100
2101         if (hw->pcm_ops->ctl_out) {
2102             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2103         }
2104     }
2105 }
2106
2107 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2108 {
2109     if (sw) {
2110         HWVoiceIn *hw = sw->hw;
2111
2112         sw->vol.mute = mute;
2113         sw->vol.l = nominal_volume.l * lvol / 255;
2114         sw->vol.r = nominal_volume.r * rvol / 255;
2115
2116         if (hw->pcm_ops->ctl_in) {
2117             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2118         }
2119     }
2120 }