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     gchar *prefix_upper;
 458
 459     if (audio_bug(__func__, !prefix)) {
 460         dolog ("prefix = NULL\n");
 461         return;
 462     }
 463
 464     if (audio_bug(__func__, !opt)) {
 465         dolog ("opt = NULL\n");
 466         return;
 467     }
 468
 469     prefix_upper = g_utf8_strup(prefix, -1);
 470
 471     for (; opt->name; opt++) {
 472         char *optname;
 473         int def;
 474
 475         if (!opt->valp) {
 476             dolog ("Option value pointer for `%s' is not set\n",
 477                    opt->name);
 478             continue;
 479         }
 480
 481         optname = g_strdup_printf("QEMU_%s_%s", prefix_upper, opt->name);
 482
 483         def = 1;
 484         switch (opt->tag) {
 485         case AUD_OPT_BOOL:
 486         case AUD_OPT_INT:
 487             {
 488                 int *intp = opt->valp;
 489                 *intp = audio_get_conf_int (optname, *intp, &def);
 490             }
 491             break;
 492
 493         case AUD_OPT_FMT:
 494             {
 495                 audfmt_e *fmtp = opt->valp;
 496                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 497             }
 498             break;
 499
 500         case AUD_OPT_STR:
 501             {
 502                 const char **strp = opt->valp;
 503                 *strp = audio_get_conf_str (optname, *strp, &def);
 504             }
 505             break;
 506
 507         default:
 508             dolog ("Bad value tag for option `%s' - %d\n",
 509                    optname, opt->tag);
 510             break;
 511         }
 512
 513         if (!opt->overriddenp) {
 514             opt->overriddenp = &opt->overridden;
 515         }
 516         *opt->overriddenp = !def;
 517         g_free (optname);
 518     }
 519     g_free(prefix_upper);
 520 }
 521
 522 static void audio_print_settings (struct audsettings *as)
 523 {
 524     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 525
 526     switch (as->fmt) {
 527     case AUD_FMT_S8:
 528         AUD_log (NULL, "S8");
 529         break;
 530     case AUD_FMT_U8:
 531         AUD_log (NULL, "U8");
 532         break;
 533     case AUD_FMT_S16:
 534         AUD_log (NULL, "S16");
 535         break;
 536     case AUD_FMT_U16:
 537         AUD_log (NULL, "U16");
 538         break;
 539     case AUD_FMT_S32:
 540         AUD_log (NULL, "S32");
 541         break;
 542     case AUD_FMT_U32:
 543         AUD_log (NULL, "U32");
 544         break;
 545     default:
 546         AUD_log (NULL, "invalid(%d)", as->fmt);
 547         break;
 548     }
 549
 550     AUD_log (NULL, " endianness=");
 551     switch (as->endianness) {
 552     case 0:
 553         AUD_log (NULL, "little");
 554         break;
 555     case 1:
 556         AUD_log (NULL, "big");
 557         break;
 558     default:
 559         AUD_log (NULL, "invalid");
 560         break;
 561     }
 562     AUD_log (NULL, "\n");
 563 }
 564
 565 static int audio_validate_settings (struct audsettings *as)
 566 {
 567     int invalid;
 568
 569     invalid = as->nchannels != 1 && as->nchannels != 2;
 570     invalid |= as->endianness != 0 && as->endianness != 1;
 571
 572     switch (as->fmt) {
 573     case AUD_FMT_S8:
 574     case AUD_FMT_U8:
 575     case AUD_FMT_S16:
 576     case AUD_FMT_U16:
 577     case AUD_FMT_S32:
 578     case AUD_FMT_U32:
 579         break;
 580     default:
 581         invalid = 1;
 582         break;
 583     }
 584
 585     invalid |= as->freq <= 0;
 586     return invalid ? -1 : 0;
 587 }
 588
 589 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 590 {
 591     int bits = 8, sign = 0;
 592
 593     switch (as->fmt) {
 594     case AUD_FMT_S8:
 595         sign = 1;
 596         /* fall through */
 597     case AUD_FMT_U8:
 598         break;
 599
 600     case AUD_FMT_S16:
 601         sign = 1;
 602         /* fall through */
 603     case AUD_FMT_U16:
 604         bits = 16;
 605         break;
 606
 607     case AUD_FMT_S32:
 608         sign = 1;
 609         /* fall through */
 610     case AUD_FMT_U32:
 611         bits = 32;
 612         break;
 613     }
 614     return info->freq == as->freq
 615         && info->nchannels == as->nchannels
 616         && info->sign == sign
 617         && info->bits == bits
 618         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 619 }
 620
 621 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 622 {
 623     int bits = 8, sign = 0, shift = 0;
 624
 625     switch (as->fmt) {
 626     case AUD_FMT_S8:
 627         sign = 1;
 628     case AUD_FMT_U8:
 629         break;
 630
 631     case AUD_FMT_S16:
 632         sign = 1;
 633     case AUD_FMT_U16:
 634         bits = 16;
 635         shift = 1;
 636         break;
 637
 638     case AUD_FMT_S32:
 639         sign = 1;
 640     case AUD_FMT_U32:
 641         bits = 32;
 642         shift = 2;
 643         break;
 644     }
 645
 646     info->freq = as->freq;
 647     info->bits = bits;
 648     info->sign = sign;
 649     info->nchannels = as->nchannels;
 650     info->shift = (as->nchannels == 2) + shift;
 651     info->align = (1 << info->shift) - 1;
 652     info->bytes_per_second = info->freq << info->shift;
 653     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 654 }
 655
 656 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 657 {
 658     if (!len) {
 659         return;
 660     }
 661
 662     if (info->sign) {
 663         memset (buf, 0x00, len << info->shift);
 664     }
 665     else {
 666         switch (info->bits) {
 667         case 8:
 668             memset (buf, 0x80, len << info->shift);
 669             break;
 670
 671         case 16:
 672             {
 673                 int i;
 674                 uint16_t *p = buf;
 675                 int shift = info->nchannels - 1;
 676                 short s = INT16_MAX;
 677
 678                 if (info->swap_endianness) {
 679                     s = bswap16 (s);
 680                 }
 681
 682                 for (i = 0; i < len << shift; i++) {
 683                     p[i] = s;
 684                 }
 685             }
 686             break;
 687
 688         case 32:
 689             {
 690                 int i;
 691                 uint32_t *p = buf;
 692                 int shift = info->nchannels - 1;
 693                 int32_t s = INT32_MAX;
 694
 695                 if (info->swap_endianness) {
 696                     s = bswap32 (s);
 697                 }
 698
 699                 for (i = 0; i < len << shift; i++) {
 700                     p[i] = s;
 701                 }
 702             }
 703             break;
 704
 705         default:
 706             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 707                      info->bits);
 708             break;
 709         }
 710     }
 711 }
 712
 713 /*
 714  * Capture
 715  */
 716 static void noop_conv (struct st_sample *dst, const void *src, int samples)
 717 {
 718     (void) src;
 719     (void) dst;
 720     (void) samples;
 721 }
 722
 723 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 724     struct audsettings *as
 725     )
 726 {
 727     CaptureVoiceOut *cap;
 728     AudioState *s = &glob_audio_state;
 729
 730     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 731         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 732             return cap;
 733         }
 734     }
 735     return NULL;
 736 }
 737
 738 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 739 {
 740     struct capture_callback *cb;
 741
 742 #ifdef DEBUG_CAPTURE
 743     dolog ("notification %d sent\n", cmd);
 744 #endif
 745     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 746         cb->ops.notify (cb->opaque, cmd);
 747     }
 748 }
 749
 750 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 751 {
 752     if (cap->hw.enabled != enabled) {
 753         audcnotification_e cmd;
 754         cap->hw.enabled = enabled;
 755         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 756         audio_notify_capture (cap, cmd);
 757     }
 758 }
 759
 760 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 761 {
 762     HWVoiceOut *hw = &cap->hw;
 763     SWVoiceOut *sw;
 764     int enabled = 0;
 765
 766     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 767         if (sw->active) {
 768             enabled = 1;
 769             break;
 770         }
 771     }
 772     audio_capture_maybe_changed (cap, enabled);
 773 }
 774
 775 static void audio_detach_capture (HWVoiceOut *hw)
 776 {
 777     SWVoiceCap *sc = hw->cap_head.lh_first;
 778
 779     while (sc) {
 780         SWVoiceCap *sc1 = sc->entries.le_next;
 781         SWVoiceOut *sw = &sc->sw;
 782         CaptureVoiceOut *cap = sc->cap;
 783         int was_active = sw->active;
 784
 785         if (sw->rate) {
 786             st_rate_stop (sw->rate);
 787             sw->rate = NULL;
 788         }
 789
 790         QLIST_REMOVE (sw, entries);
 791         QLIST_REMOVE (sc, entries);
 792         g_free (sc);
 793         if (was_active) {
 794             /* We have removed soft voice from the capture:
 795                this might have changed the overall status of the capture
 796                since this might have been the only active voice */
 797             audio_recalc_and_notify_capture (cap);
 798         }
 799         sc = sc1;
 800     }
 801 }
 802
 803 static int audio_attach_capture (HWVoiceOut *hw)
 804 {
 805     AudioState *s = &glob_audio_state;
 806     CaptureVoiceOut *cap;
 807
 808     audio_detach_capture (hw);
 809     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 810         SWVoiceCap *sc;
 811         SWVoiceOut *sw;
 812         HWVoiceOut *hw_cap = &cap->hw;
 813
 814         sc = audio_calloc(__func__, 1, sizeof(*sc));
 815         if (!sc) {
 816             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 817                    sizeof (*sc));
 818             return -1;
 819         }
 820
 821         sc->cap = cap;
 822         sw = &sc->sw;
 823         sw->hw = hw_cap;
 824         sw->info = hw->info;
 825         sw->empty = 1;
 826         sw->active = hw->enabled;
 827         sw->conv = noop_conv;
 828         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 829         sw->vol = nominal_volume;
 830         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 831         if (!sw->rate) {
 832             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 833             g_free (sw);
 834             return -1;
 835         }
 836         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 837         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 838 #ifdef DEBUG_CAPTURE
 839         sw->name = g_strdup_printf ("for %p %d,%d,%d",
 840                                     hw, sw->info.freq, sw->info.bits,
 841                                     sw->info.nchannels);
 842         dolog ("Added %s active = %d\n", sw->name, sw->active);
 843 #endif
 844         if (sw->active) {
 845             audio_capture_maybe_changed (cap, 1);
 846         }
 847     }
 848     return 0;
 849 }
 850
 851 /*
 852  * Hard voice (capture)
 853  */
 854 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 855 {
 856     SWVoiceIn *sw;
 857     int m = hw->total_samples_captured;
 858
 859     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 860         if (sw->active) {
 861             m = audio_MIN (m, sw->total_hw_samples_acquired);
 862         }
 863     }
 864     return m;
 865 }
 866
 867 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 868 {
 869     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 870     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 871         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 872         return 0;
 873     }
 874     return live;
 875 }
 876
 877 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 878                            int live, int pending)
 879 {
 880     int left = hw->samples - pending;
 881     int len = audio_MIN (left, live);
 882     int clipped = 0;
 883
 884     while (len) {
 885         struct st_sample *src = hw->mix_buf + hw->rpos;
 886         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 887         int samples_till_end_of_buf = hw->samples - hw->rpos;
 888         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 889
 890         hw->clip (dst, src, samples_to_clip);
 891
 892         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 893         len -= samples_to_clip;
 894         clipped += samples_to_clip;
 895     }
 896     return clipped;
 897 }
 898
 899 /*
 900  * Soft voice (capture)
 901  */
 902 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 903 {
 904     HWVoiceIn *hw = sw->hw;
 905     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 906     int rpos;
 907
 908     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 909         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 910         return 0;
 911     }
 912
 913     rpos = hw->wpos - live;
 914     if (rpos >= 0) {
 915         return rpos;
 916     }
 917     else {
 918         return hw->samples + rpos;
 919     }
 920 }
 921
 922 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 923 {
 924     HWVoiceIn *hw = sw->hw;
 925     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 926     struct st_sample *src, *dst = sw->buf;
 927
 928     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 929
 930     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 931     if (audio_bug(__func__, live < 0 || live > hw->samples)) {
 932         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 933         return 0;
 934     }
 935
 936     samples = size >> sw->info.shift;
 937     if (!live) {
 938         return 0;
 939     }
 940
 941     swlim = (live * sw->ratio) >> 32;
 942     swlim = audio_MIN (swlim, samples);
 943
 944     while (swlim) {
 945         src = hw->conv_buf + rpos;
 946         isamp = hw->wpos - rpos;
 947         /* XXX: <= ? */
 948         if (isamp <= 0) {
 949             isamp = hw->samples - rpos;
 950         }
 951
 952         if (!isamp) {
 953             break;
 954         }
 955         osamp = swlim;
 956
 957         if (audio_bug(__func__, osamp < 0)) {
 958             dolog ("osamp=%d\n", osamp);
 959             return 0;
 960         }
 961
 962         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 963         swlim -= osamp;
 964         rpos = (rpos + isamp) % hw->samples;
 965         dst += osamp;
 966         ret += osamp;
 967         total += isamp;
 968     }
 969
 970     if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
 971         mixeng_volume (sw->buf, ret, &sw->vol);
 972     }
 973
 974     sw->clip (buf, sw->buf, ret);
 975     sw->total_hw_samples_acquired += total;
 976     return ret << sw->info.shift;
 977 }
 978
 979 /*
 980  * Hard voice (playback)
 981  */
 982 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 983 {
 984     SWVoiceOut *sw;
 985     int m = INT_MAX;
 986     int nb_live = 0;
 987
 988     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 989         if (sw->active || !sw->empty) {
 990             m = audio_MIN (m, sw->total_hw_samples_mixed);
 991             nb_live += 1;
 992         }
 993     }
 994
 995     *nb_livep = nb_live;
 996     return m;
 997 }
 998
 999 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
1000 {
1001     int smin;
1002     int nb_live1;
1003
1004     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
1005     if (nb_live) {
1006         *nb_live = nb_live1;
1007     }
1008
1009     if (nb_live1) {
1010         int live = smin;
1011
1012         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1013             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1014             return 0;
1015         }
1016         return live;
1017     }
1018     return 0;
1019 }
1020
1021 /*
1022  * Soft voice (playback)
1023  */
1024 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1025 {
1026     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1027     int ret = 0, pos = 0, total = 0;
1028
1029     if (!sw) {
1030         return size;
1031     }
1032
1033     hwsamples = sw->hw->samples;
1034
1035     live = sw->total_hw_samples_mixed;
1036     if (audio_bug(__func__, live < 0 || live > hwsamples)) {
1037         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1038         return 0;
1039     }
1040
1041     if (live == hwsamples) {
1042 #ifdef DEBUG_OUT
1043         dolog ("%s is full %d\n", sw->name, live);
1044 #endif
1045         return 0;
1046     }
1047
1048     wpos = (sw->hw->rpos + live) % hwsamples;
1049     samples = size >> sw->info.shift;
1050
1051     dead = hwsamples - live;
1052     swlim = ((int64_t) dead << 32) / sw->ratio;
1053     swlim = audio_MIN (swlim, samples);
1054     if (swlim) {
1055         sw->conv (sw->buf, buf, swlim);
1056
1057         if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
1058             mixeng_volume (sw->buf, swlim, &sw->vol);
1059         }
1060     }
1061
1062     while (swlim) {
1063         dead = hwsamples - live;
1064         left = hwsamples - wpos;
1065         blck = audio_MIN (dead, left);
1066         if (!blck) {
1067             break;
1068         }
1069         isamp = swlim;
1070         osamp = blck;
1071         st_rate_flow_mix (
1072             sw->rate,
1073             sw->buf + pos,
1074             sw->hw->mix_buf + wpos,
1075             &isamp,
1076             &osamp
1077             );
1078         ret += isamp;
1079         swlim -= isamp;
1080         pos += isamp;
1081         live += osamp;
1082         wpos = (wpos + osamp) % hwsamples;
1083         total += osamp;
1084     }
1085
1086     sw->total_hw_samples_mixed += total;
1087     sw->empty = sw->total_hw_samples_mixed == 0;
1088
1089 #ifdef DEBUG_OUT
1090     dolog (
1091         "%s: write size %d ret %d total sw %d\n",
1092         SW_NAME (sw),
1093         size >> sw->info.shift,
1094         ret,
1095         sw->total_hw_samples_mixed
1096         );
1097 #endif
1098
1099     return ret << sw->info.shift;
1100 }
1101
1102 #ifdef DEBUG_AUDIO
1103 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1104 {
1105     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1106            cap, info->bits, info->sign, info->freq, info->nchannels);
1107 }
1108 #endif
1109
1110 #define DAC
1111 #include "audio_template.h"
1112 #undef DAC
1113 #include "audio_template.h"
1114
1115 /*
1116  * Timer
1117  */
1118
1119 static bool audio_timer_running;
1120 static uint64_t audio_timer_last;
1121
1122 static int audio_is_timer_needed (void)
1123 {
1124     HWVoiceIn *hwi = NULL;
1125     HWVoiceOut *hwo = NULL;
1126
1127     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1128         if (!hwo->poll_mode) return 1;
1129     }
1130     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1131         if (!hwi->poll_mode) return 1;
1132     }
1133     return 0;
1134 }
1135
1136 static void audio_reset_timer (AudioState *s)
1137 {
1138     if (audio_is_timer_needed ()) {
1139         timer_mod_anticipate_ns(s->ts,
1140             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
1141         if (!audio_timer_running) {
1142             audio_timer_running = true;
1143             audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1144             trace_audio_timer_start(conf.period.ticks / SCALE_MS);
1145         }
1146     } else {
1147         timer_del(s->ts);
1148         if (audio_timer_running) {
1149             audio_timer_running = false;
1150             trace_audio_timer_stop();
1151         }
1152     }
1153 }
1154
1155 static void audio_timer (void *opaque)
1156 {
1157     int64_t now, diff;
1158
1159     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1160     diff = now - audio_timer_last;
1161     if (diff > conf.period.ticks * 3 / 2) {
1162         trace_audio_timer_delayed(diff / SCALE_MS);
1163     }
1164     audio_timer_last = now;
1165
1166     audio_run ("timer");
1167     audio_reset_timer (opaque);
1168 }
1169
1170 /*
1171  * Public API
1172  */
1173 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1174 {
1175     if (!sw) {
1176         /* XXX: Consider options */
1177         return size;
1178     }
1179
1180     if (!sw->hw->enabled) {
1181         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1182         return 0;
1183     }
1184
1185     return sw->hw->pcm_ops->write(sw, buf, size);
1186 }
1187
1188 int AUD_read (SWVoiceIn *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 ("Reading from disabled voice %s\n", SW_NAME (sw));
1197         return 0;
1198     }
1199
1200     return sw->hw->pcm_ops->read(sw, buf, size);
1201 }
1202
1203 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1204 {
1205     return sw->hw->samples << sw->hw->info.shift;
1206 }
1207
1208 void AUD_set_active_out (SWVoiceOut *sw, int on)
1209 {
1210     HWVoiceOut *hw;
1211
1212     if (!sw) {
1213         return;
1214     }
1215
1216     hw = sw->hw;
1217     if (sw->active != on) {
1218         AudioState *s = &glob_audio_state;
1219         SWVoiceOut *temp_sw;
1220         SWVoiceCap *sc;
1221
1222         if (on) {
1223             hw->pending_disable = 0;
1224             if (!hw->enabled) {
1225                 hw->enabled = 1;
1226                 if (s->vm_running) {
1227                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1228                     audio_reset_timer (s);
1229                 }
1230             }
1231         }
1232         else {
1233             if (hw->enabled) {
1234                 int nb_active = 0;
1235
1236                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1237                      temp_sw = temp_sw->entries.le_next) {
1238                     nb_active += temp_sw->active != 0;
1239                 }
1240
1241                 hw->pending_disable = nb_active == 1;
1242             }
1243         }
1244
1245         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1246             sc->sw.active = hw->enabled;
1247             if (hw->enabled) {
1248                 audio_capture_maybe_changed (sc->cap, 1);
1249             }
1250         }
1251         sw->active = on;
1252     }
1253 }
1254
1255 void AUD_set_active_in (SWVoiceIn *sw, int on)
1256 {
1257     HWVoiceIn *hw;
1258
1259     if (!sw) {
1260         return;
1261     }
1262
1263     hw = sw->hw;
1264     if (sw->active != on) {
1265         AudioState *s = &glob_audio_state;
1266         SWVoiceIn *temp_sw;
1267
1268         if (on) {
1269             if (!hw->enabled) {
1270                 hw->enabled = 1;
1271                 if (s->vm_running) {
1272                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1273                     audio_reset_timer (s);
1274                 }
1275             }
1276             sw->total_hw_samples_acquired = hw->total_samples_captured;
1277         }
1278         else {
1279             if (hw->enabled) {
1280                 int nb_active = 0;
1281
1282                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1283                      temp_sw = temp_sw->entries.le_next) {
1284                     nb_active += temp_sw->active != 0;
1285                 }
1286
1287                 if (nb_active == 1) {
1288                     hw->enabled = 0;
1289                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1290                 }
1291             }
1292         }
1293         sw->active = on;
1294     }
1295 }
1296
1297 static int audio_get_avail (SWVoiceIn *sw)
1298 {
1299     int live;
1300
1301     if (!sw) {
1302         return 0;
1303     }
1304
1305     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1306     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1307         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1308         return 0;
1309     }
1310
1311     ldebug (
1312         "%s: get_avail live %d ret %" PRId64 "\n",
1313         SW_NAME (sw),
1314         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1315         );
1316
1317     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1318 }
1319
1320 static int audio_get_free (SWVoiceOut *sw)
1321 {
1322     int live, dead;
1323
1324     if (!sw) {
1325         return 0;
1326     }
1327
1328     live = sw->total_hw_samples_mixed;
1329
1330     if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1331         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1332         return 0;
1333     }
1334
1335     dead = sw->hw->samples - live;
1336
1337 #ifdef DEBUG_OUT
1338     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1339            SW_NAME (sw),
1340            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1341 #endif
1342
1343     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1344 }
1345
1346 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1347 {
1348     int n;
1349
1350     if (hw->enabled) {
1351         SWVoiceCap *sc;
1352
1353         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1354             SWVoiceOut *sw = &sc->sw;
1355             int rpos2 = rpos;
1356
1357             n = samples;
1358             while (n) {
1359                 int till_end_of_hw = hw->samples - rpos2;
1360                 int to_write = audio_MIN (till_end_of_hw, n);
1361                 int bytes = to_write << hw->info.shift;
1362                 int written;
1363
1364                 sw->buf = hw->mix_buf + rpos2;
1365                 written = audio_pcm_sw_write (sw, NULL, bytes);
1366                 if (written - bytes) {
1367                     dolog ("Could not mix %d bytes into a capture "
1368                            "buffer, mixed %d\n",
1369                            bytes, written);
1370                     break;
1371                 }
1372                 n -= to_write;
1373                 rpos2 = (rpos2 + to_write) % hw->samples;
1374             }
1375         }
1376     }
1377
1378     n = audio_MIN (samples, hw->samples - rpos);
1379     mixeng_clear (hw->mix_buf + rpos, n);
1380     mixeng_clear (hw->mix_buf, samples - n);
1381 }
1382
1383 static void audio_run_out (AudioState *s)
1384 {
1385     HWVoiceOut *hw = NULL;
1386     SWVoiceOut *sw;
1387
1388     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1389         int played;
1390         int live, free, nb_live, cleanup_required, prev_rpos;
1391
1392         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1393         if (!nb_live) {
1394             live = 0;
1395         }
1396
1397         if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1398             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1399             continue;
1400         }
1401
1402         if (hw->pending_disable && !nb_live) {
1403             SWVoiceCap *sc;
1404 #ifdef DEBUG_OUT
1405             dolog ("Disabling voice\n");
1406 #endif
1407             hw->enabled = 0;
1408             hw->pending_disable = 0;
1409             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1410             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1411                 sc->sw.active = 0;
1412                 audio_recalc_and_notify_capture (sc->cap);
1413             }
1414             continue;
1415         }
1416
1417         if (!live) {
1418             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1419                 if (sw->active) {
1420                     free = audio_get_free (sw);
1421                     if (free > 0) {
1422                         sw->callback.fn (sw->callback.opaque, free);
1423                     }
1424                 }
1425             }
1426             continue;
1427         }
1428
1429         prev_rpos = hw->rpos;
1430         played = hw->pcm_ops->run_out (hw, live);
1431         replay_audio_out(&played);
1432         if (audio_bug(__func__, hw->rpos >= hw->samples)) {
1433             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1434                    hw->rpos, hw->samples, played);
1435             hw->rpos = 0;
1436         }
1437
1438 #ifdef DEBUG_OUT
1439         dolog ("played=%d\n", played);
1440 #endif
1441
1442         if (played) {
1443             hw->ts_helper += played;
1444             audio_capture_mix_and_clear (hw, prev_rpos, played);
1445         }
1446
1447         cleanup_required = 0;
1448         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1449             if (!sw->active && sw->empty) {
1450                 continue;
1451             }
1452
1453             if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1454                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1455                        played, sw->total_hw_samples_mixed);
1456                 played = sw->total_hw_samples_mixed;
1457             }
1458
1459             sw->total_hw_samples_mixed -= played;
1460
1461             if (!sw->total_hw_samples_mixed) {
1462                 sw->empty = 1;
1463                 cleanup_required |= !sw->active && !sw->callback.fn;
1464             }
1465
1466             if (sw->active) {
1467                 free = audio_get_free (sw);
1468                 if (free > 0) {
1469                     sw->callback.fn (sw->callback.opaque, free);
1470                 }
1471             }
1472         }
1473
1474         if (cleanup_required) {
1475             SWVoiceOut *sw1;
1476
1477             sw = hw->sw_head.lh_first;
1478             while (sw) {
1479                 sw1 = sw->entries.le_next;
1480                 if (!sw->active && !sw->callback.fn) {
1481                     audio_close_out (sw);
1482                 }
1483                 sw = sw1;
1484             }
1485         }
1486     }
1487 }
1488
1489 static void audio_run_in (AudioState *s)
1490 {
1491     HWVoiceIn *hw = NULL;
1492
1493     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1494         SWVoiceIn *sw;
1495         int captured = 0, min;
1496
1497         if (replay_mode != REPLAY_MODE_PLAY) {
1498             captured = hw->pcm_ops->run_in(hw);
1499         }
1500         replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
1501
1502         min = audio_pcm_hw_find_min_in (hw);
1503         hw->total_samples_captured += captured - min;
1504         hw->ts_helper += captured;
1505
1506         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1507             sw->total_hw_samples_acquired -= min;
1508
1509             if (sw->active) {
1510                 int avail;
1511
1512                 avail = audio_get_avail (sw);
1513                 if (avail > 0) {
1514                     sw->callback.fn (sw->callback.opaque, avail);
1515                 }
1516             }
1517         }
1518     }
1519 }
1520
1521 static void audio_run_capture (AudioState *s)
1522 {
1523     CaptureVoiceOut *cap;
1524
1525     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1526         int live, rpos, captured;
1527         HWVoiceOut *hw = &cap->hw;
1528         SWVoiceOut *sw;
1529
1530         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1531         rpos = hw->rpos;
1532         while (live) {
1533             int left = hw->samples - rpos;
1534             int to_capture = audio_MIN (live, left);
1535             struct st_sample *src;
1536             struct capture_callback *cb;
1537
1538             src = hw->mix_buf + rpos;
1539             hw->clip (cap->buf, src, to_capture);
1540             mixeng_clear (src, to_capture);
1541
1542             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1543                 cb->ops.capture (cb->opaque, cap->buf,
1544                                  to_capture << hw->info.shift);
1545             }
1546             rpos = (rpos + to_capture) % hw->samples;
1547             live -= to_capture;
1548         }
1549         hw->rpos = rpos;
1550
1551         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1552             if (!sw->active && sw->empty) {
1553                 continue;
1554             }
1555
1556             if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1557                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1558                        captured, sw->total_hw_samples_mixed);
1559                 captured = sw->total_hw_samples_mixed;
1560             }
1561
1562             sw->total_hw_samples_mixed -= captured;
1563             sw->empty = sw->total_hw_samples_mixed == 0;
1564         }
1565     }
1566 }
1567
1568 void audio_run (const char *msg)
1569 {
1570     AudioState *s = &glob_audio_state;
1571
1572     audio_run_out (s);
1573     audio_run_in (s);
1574     audio_run_capture (s);
1575 #ifdef DEBUG_POLL
1576     {
1577         static double prevtime;
1578         double currtime;
1579         struct timeval tv;
1580
1581         if (gettimeofday (&tv, NULL)) {
1582             perror ("audio_run: gettimeofday");
1583             return;
1584         }
1585
1586         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1587         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1588         prevtime = currtime;
1589     }
1590 #endif
1591 }
1592
1593 static struct audio_option audio_options[] = {
1594     /* DAC */
1595     {
1596         .name  = "DAC_FIXED_SETTINGS",
1597         .tag   = AUD_OPT_BOOL,
1598         .valp  = &conf.fixed_out.enabled,
1599         .descr = "Use fixed settings for host DAC"
1600     },
1601     {
1602         .name  = "DAC_FIXED_FREQ",
1603         .tag   = AUD_OPT_INT,
1604         .valp  = &conf.fixed_out.settings.freq,
1605         .descr = "Frequency for fixed host DAC"
1606     },
1607     {
1608         .name  = "DAC_FIXED_FMT",
1609         .tag   = AUD_OPT_FMT,
1610         .valp  = &conf.fixed_out.settings.fmt,
1611         .descr = "Format for fixed host DAC"
1612     },
1613     {
1614         .name  = "DAC_FIXED_CHANNELS",
1615         .tag   = AUD_OPT_INT,
1616         .valp  = &conf.fixed_out.settings.nchannels,
1617         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1618     },
1619     {
1620         .name  = "DAC_VOICES",
1621         .tag   = AUD_OPT_INT,
1622         .valp  = &conf.fixed_out.nb_voices,
1623         .descr = "Number of voices for DAC"
1624     },
1625     {
1626         .name  = "DAC_TRY_POLL",
1627         .tag   = AUD_OPT_BOOL,
1628         .valp  = &conf.try_poll_out,
1629         .descr = "Attempt using poll mode for DAC"
1630     },
1631     /* ADC */
1632     {
1633         .name  = "ADC_FIXED_SETTINGS",
1634         .tag   = AUD_OPT_BOOL,
1635         .valp  = &conf.fixed_in.enabled,
1636         .descr = "Use fixed settings for host ADC"
1637     },
1638     {
1639         .name  = "ADC_FIXED_FREQ",
1640         .tag   = AUD_OPT_INT,
1641         .valp  = &conf.fixed_in.settings.freq,
1642         .descr = "Frequency for fixed host ADC"
1643     },
1644     {
1645         .name  = "ADC_FIXED_FMT",
1646         .tag   = AUD_OPT_FMT,
1647         .valp  = &conf.fixed_in.settings.fmt,
1648         .descr = "Format for fixed host ADC"
1649     },
1650     {
1651         .name  = "ADC_FIXED_CHANNELS",
1652         .tag   = AUD_OPT_INT,
1653         .valp  = &conf.fixed_in.settings.nchannels,
1654         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1655     },
1656     {
1657         .name  = "ADC_VOICES",
1658         .tag   = AUD_OPT_INT,
1659         .valp  = &conf.fixed_in.nb_voices,
1660         .descr = "Number of voices for ADC"
1661     },
1662     {
1663         .name  = "ADC_TRY_POLL",
1664         .tag   = AUD_OPT_BOOL,
1665         .valp  = &conf.try_poll_in,
1666         .descr = "Attempt using poll mode for ADC"
1667     },
1668     /* Misc */
1669     {
1670         .name  = "TIMER_PERIOD",
1671         .tag   = AUD_OPT_INT,
1672         .valp  = &conf.period.hertz,
1673         .descr = "Timer period in HZ (0 - use lowest possible)"
1674     },
1675     { /* End of list */ }
1676 };
1677
1678 static void audio_pp_nb_voices (const char *typ, int nb)
1679 {
1680     switch (nb) {
1681     case 0:
1682         printf ("Does not support %s\n", typ);
1683         break;
1684     case 1:
1685         printf ("One %s voice\n", typ);
1686         break;
1687     case INT_MAX:
1688         printf ("Theoretically supports many %s voices\n", typ);
1689         break;
1690     default:
1691         printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1692         break;
1693     }
1694
1695 }
1696
1697 void AUD_help (void)
1698 {
1699     struct audio_driver *d;
1700
1701     /* make sure we print the help text for modular drivers too */
1702     audio_module_load_all();
1703
1704     audio_process_options ("AUDIO", audio_options);
1705     QLIST_FOREACH(d, &audio_drivers, next) {
1706         if (d->options) {
1707             audio_process_options (d->name, d->options);
1708         }
1709     }
1710
1711     printf ("Audio options:\n");
1712     audio_print_options ("AUDIO", audio_options);
1713     printf ("\n");
1714
1715     printf ("Available drivers:\n");
1716
1717     QLIST_FOREACH(d, &audio_drivers, next) {
1718
1719         printf ("Name: %s\n", d->name);
1720         printf ("Description: %s\n", d->descr);
1721
1722         audio_pp_nb_voices ("playback", d->max_voices_out);
1723         audio_pp_nb_voices ("capture", d->max_voices_in);
1724
1725         if (d->options) {
1726             printf ("Options:\n");
1727             audio_print_options (d->name, d->options);
1728         }
1729         else {
1730             printf ("No options\n");
1731         }
1732         printf ("\n");
1733     }
1734
1735     printf (
1736         "Options are settable through environment variables.\n"
1737         "Example:\n"
1738 #ifdef _WIN32
1739         "  set QEMU_AUDIO_DRV=wav\n"
1740         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1741 #else
1742         "  export QEMU_AUDIO_DRV=wav\n"
1743         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1744         "(for csh replace export with setenv in the above)\n"
1745 #endif
1746         "  qemu ...\n\n"
1747         );
1748 }
1749
1750 static int audio_driver_init(AudioState *s, struct audio_driver *drv, bool msg)
1751 {
1752     if (drv->options) {
1753         audio_process_options (drv->name, drv->options);
1754     }
1755     s->drv_opaque = drv->init ();
1756
1757     if (s->drv_opaque) {
1758         audio_init_nb_voices_out (drv);
1759         audio_init_nb_voices_in (drv);
1760         s->drv = drv;
1761         return 0;
1762     }
1763     else {
1764         if (msg) {
1765             dolog("Could not init `%s' audio driver\n", drv->name);
1766         }
1767         return -1;
1768     }
1769 }
1770
1771 static void audio_vm_change_state_handler (void *opaque, int running,
1772                                            RunState state)
1773 {
1774     AudioState *s = opaque;
1775     HWVoiceOut *hwo = NULL;
1776     HWVoiceIn *hwi = NULL;
1777     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1778
1779     s->vm_running = running;
1780     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1781         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1782     }
1783
1784     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1785         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1786     }
1787     audio_reset_timer (s);
1788 }
1789
1790 static bool is_cleaning_up;
1791
1792 bool audio_is_cleaning_up(void)
1793 {
1794     return is_cleaning_up;
1795 }
1796
1797 void audio_cleanup(void)
1798 {
1799     AudioState *s = &glob_audio_state;
1800     HWVoiceOut *hwo, *hwon;
1801     HWVoiceIn *hwi, *hwin;
1802
1803     is_cleaning_up = true;
1804     QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1805         SWVoiceCap *sc;
1806
1807         if (hwo->enabled) {
1808             hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1809         }
1810         hwo->pcm_ops->fini_out (hwo);
1811
1812         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1813             CaptureVoiceOut *cap = sc->cap;
1814             struct capture_callback *cb;
1815
1816             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1817                 cb->ops.destroy (cb->opaque);
1818             }
1819         }
1820         QLIST_REMOVE(hwo, entries);
1821     }
1822
1823     QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1824         if (hwi->enabled) {
1825             hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1826         }
1827         hwi->pcm_ops->fini_in (hwi);
1828         QLIST_REMOVE(hwi, entries);
1829     }
1830
1831     if (s->drv) {
1832         s->drv->fini (s->drv_opaque);
1833         s->drv = NULL;
1834     }
1835 }
1836
1837 static const VMStateDescription vmstate_audio = {
1838     .name = "audio",
1839     .version_id = 1,
1840     .minimum_version_id = 1,
1841     .fields = (VMStateField[]) {
1842         VMSTATE_END_OF_LIST()
1843     }
1844 };
1845
1846 static void audio_init (void)
1847 {
1848     size_t i;
1849     int done = 0;
1850     const char *drvname;
1851     VMChangeStateEntry *e;
1852     AudioState *s = &glob_audio_state;
1853     struct audio_driver *driver;
1854
1855     if (s->drv) {
1856         return;
1857     }
1858
1859     QLIST_INIT (&s->hw_head_out);
1860     QLIST_INIT (&s->hw_head_in);
1861     QLIST_INIT (&s->cap_head);
1862     atexit(audio_cleanup);
1863
1864     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1865
1866     audio_process_options ("AUDIO", audio_options);
1867
1868     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1869     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1870
1871     if (s->nb_hw_voices_out <= 0) {
1872         dolog ("Bogus number of playback voices %d, setting to 1\n",
1873                s->nb_hw_voices_out);
1874         s->nb_hw_voices_out = 1;
1875     }
1876
1877     if (s->nb_hw_voices_in <= 0) {
1878         dolog ("Bogus number of capture voices %d, setting to 0\n",
1879                s->nb_hw_voices_in);
1880         s->nb_hw_voices_in = 0;
1881     }
1882
1883     {
1884         int def;
1885         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1886     }
1887
1888     if (drvname) {
1889         driver = audio_driver_lookup(drvname);
1890         if (driver) {
1891             done = !audio_driver_init(s, driver, true);
1892         } else {
1893             dolog ("Unknown audio driver `%s'\n", drvname);
1894             dolog ("Run with -audio-help to list available drivers\n");
1895         }
1896     }
1897
1898     if (!done) {
1899         for (i = 0; !done && i < ARRAY_SIZE(audio_prio_list); i++) {
1900             driver = audio_driver_lookup(audio_prio_list[i]);
1901             if (driver && driver->can_be_default) {
1902                 done = !audio_driver_init(s, driver, false);
1903             }
1904         }
1905     }
1906
1907     if (!done) {
1908         driver = audio_driver_lookup("none");
1909         done = !audio_driver_init(s, driver, false);
1910         assert(done);
1911         dolog("warning: Using timer based audio emulation\n");
1912     }
1913
1914     if (conf.period.hertz <= 0) {
1915         if (conf.period.hertz < 0) {
1916             dolog ("warning: Timer period is negative - %d "
1917                    "treating as zero\n",
1918                    conf.period.hertz);
1919         }
1920         conf.period.ticks = 1;
1921     } else {
1922         conf.period.ticks = NANOSECONDS_PER_SECOND / conf.period.hertz;
1923     }
1924
1925     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1926     if (!e) {
1927         dolog ("warning: Could not register change state handler\n"
1928                "(Audio can continue looping even after stopping the VM)\n");
1929     }
1930
1931     QLIST_INIT (&s->card_head);
1932     vmstate_register (NULL, 0, &vmstate_audio, s);
1933 }
1934
1935 void AUD_register_card (const char *name, QEMUSoundCard *card)
1936 {
1937     audio_init ();
1938     card->name = g_strdup (name);
1939     memset (&card->entries, 0, sizeof (card->entries));
1940     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1941 }
1942
1943 void AUD_remove_card (QEMUSoundCard *card)
1944 {
1945     QLIST_REMOVE (card, entries);
1946     g_free (card->name);
1947 }
1948
1949
1950 CaptureVoiceOut *AUD_add_capture (
1951     struct audsettings *as,
1952     struct audio_capture_ops *ops,
1953     void *cb_opaque
1954     )
1955 {
1956     AudioState *s = &glob_audio_state;
1957     CaptureVoiceOut *cap;
1958     struct capture_callback *cb;
1959
1960     if (audio_validate_settings (as)) {
1961         dolog ("Invalid settings were passed when trying to add capture\n");
1962         audio_print_settings (as);
1963         goto err0;
1964     }
1965
1966     cb = audio_calloc(__func__, 1, sizeof(*cb));
1967     if (!cb) {
1968         dolog ("Could not allocate capture callback information, size %zu\n",
1969                sizeof (*cb));
1970         goto err0;
1971     }
1972     cb->ops = *ops;
1973     cb->opaque = cb_opaque;
1974
1975     cap = audio_pcm_capture_find_specific (as);
1976     if (cap) {
1977         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1978         return cap;
1979     }
1980     else {
1981         HWVoiceOut *hw;
1982         CaptureVoiceOut *cap;
1983
1984         cap = audio_calloc(__func__, 1, sizeof(*cap));
1985         if (!cap) {
1986             dolog ("Could not allocate capture voice, size %zu\n",
1987                    sizeof (*cap));
1988             goto err1;
1989         }
1990
1991         hw = &cap->hw;
1992         QLIST_INIT (&hw->sw_head);
1993         QLIST_INIT (&cap->cb_head);
1994
1995         /* XXX find a more elegant way */
1996         hw->samples = 4096 * 4;
1997         hw->mix_buf = audio_calloc(__func__, hw->samples,
1998                                    sizeof(struct st_sample));
1999         if (!hw->mix_buf) {
2000             dolog ("Could not allocate capture mix buffer (%d samples)\n",
2001                    hw->samples);
2002             goto err2;
2003         }
2004
2005         audio_pcm_init_info (&hw->info, as);
2006
2007         cap->buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
2008         if (!cap->buf) {
2009             dolog ("Could not allocate capture buffer "
2010                    "(%d samples, each %d bytes)\n",
2011                    hw->samples, 1 << hw->info.shift);
2012             goto err3;
2013         }
2014
2015         hw->clip = mixeng_clip
2016             [hw->info.nchannels == 2]
2017             [hw->info.sign]
2018             [hw->info.swap_endianness]
2019             [audio_bits_to_index (hw->info.bits)];
2020
2021         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2022         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2023
2024         QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
2025             audio_attach_capture (hw);
2026         }
2027         return cap;
2028
2029     err3:
2030         g_free (cap->hw.mix_buf);
2031     err2:
2032         g_free (cap);
2033     err1:
2034         g_free (cb);
2035     err0:
2036         return NULL;
2037     }
2038 }
2039
2040 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2041 {
2042     struct capture_callback *cb;
2043
2044     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2045         if (cb->opaque == cb_opaque) {
2046             cb->ops.destroy (cb_opaque);
2047             QLIST_REMOVE (cb, entries);
2048             g_free (cb);
2049
2050             if (!cap->cb_head.lh_first) {
2051                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2052
2053                 while (sw) {
2054                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2055 #ifdef DEBUG_CAPTURE
2056                     dolog ("freeing %s\n", sw->name);
2057 #endif
2058
2059                     sw1 = sw->entries.le_next;
2060                     if (sw->rate) {
2061                         st_rate_stop (sw->rate);
2062                         sw->rate = NULL;
2063                     }
2064                     QLIST_REMOVE (sw, entries);
2065                     QLIST_REMOVE (sc, entries);
2066                     g_free (sc);
2067                     sw = sw1;
2068                 }
2069                 QLIST_REMOVE (cap, entries);
2070                 g_free (cap->hw.mix_buf);
2071                 g_free (cap->buf);
2072                 g_free (cap);
2073             }
2074             return;
2075         }
2076     }
2077 }
2078
2079 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2080 {
2081     if (sw) {
2082         HWVoiceOut *hw = sw->hw;
2083
2084         sw->vol.mute = mute;
2085         sw->vol.l = nominal_volume.l * lvol / 255;
2086         sw->vol.r = nominal_volume.r * rvol / 255;
2087
2088         if (hw->pcm_ops->ctl_out) {
2089             hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
2090         }
2091     }
2092 }
2093
2094 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2095 {
2096     if (sw) {
2097         HWVoiceIn *hw = sw->hw;
2098
2099         sw->vol.mute = mute;
2100         sw->vol.l = nominal_volume.l * lvol / 255;
2101         sw->vol.r = nominal_volume.r * rvol / 255;
2102
2103         if (hw->pcm_ops->ctl_in) {
2104             hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
2105         }
2106     }
2107 }