audio/audio.c

   1 /*
   2  * QEMU Audio subsystem
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw/hw.h"
  25 #include "audio.h"
  26 #include "monitor.h"
  27 #include "qemu-timer.h"
  28 #include "sysemu.h"
  29
  30 #define AUDIO_CAP "audio"
  31 #include "audio_int.h"
  32
  33 /* #define DEBUG_PLIVE */
  34 /* #define DEBUG_LIVE */
  35 /* #define DEBUG_OUT */
  36 /* #define DEBUG_CAPTURE */
  37 /* #define DEBUG_POLL */
  38
  39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
  40
  41
  42 /* Order of CONFIG_AUDIO_DRIVERS is import.
  43    The 1st one is the one used by default, that is the reason
  44     that we generate the list.
  45 */
  46 static struct audio_driver *drvtab[] = {
  47     CONFIG_AUDIO_DRIVERS
  48     &no_audio_driver,
  49     &wav_audio_driver
  50 };
  51
  52 struct fixed_settings {
  53     int enabled;
  54     int nb_voices;
  55     int greedy;
  56     struct audsettings settings;
  57 };
  58
  59 static struct {
  60     struct fixed_settings fixed_out;
  61     struct fixed_settings fixed_in;
  62     union {
  63         int hertz;
  64         int64_t ticks;
  65     } period;
  66     int plive;
  67     int log_to_monitor;
  68     int try_poll_in;
  69     int try_poll_out;
  70 } conf = {
  71     .fixed_out = { /* DAC fixed settings */
  72         .enabled = 1,
  73         .nb_voices = 1,
  74         .greedy = 1,
  75         .settings = {
  76             .freq = 44100,
  77             .nchannels = 2,
  78             .fmt = AUD_FMT_S16,
  79             .endianness =  AUDIO_HOST_ENDIANNESS,
  80         }
  81     },
  82
  83     .fixed_in = { /* ADC fixed settings */
  84         .enabled = 1,
  85         .nb_voices = 1,
  86         .greedy = 1,
  87         .settings = {
  88             .freq = 44100,
  89             .nchannels = 2,
  90             .fmt = AUD_FMT_S16,
  91             .endianness = AUDIO_HOST_ENDIANNESS,
  92         }
  93     },
  94
  95     .period = { .hertz = 250 },
  96     .plive = 0,
  97     .log_to_monitor = 0,
  98     .try_poll_in = 1,
  99     .try_poll_out = 1,
 100 };
 101
 102 static AudioState glob_audio_state;
 103
 104 struct mixeng_volume nominal_volume = {
 105     .mute = 0,
 106 #ifdef FLOAT_MIXENG
 107     .r = 1.0,
 108     .l = 1.0,
 109 #else
 110     .r = 1ULL << 32,
 111     .l = 1ULL << 32,
 112 #endif
 113 };
 114
 115 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
 116 #error No its not
 117 #else
 118 int audio_bug (const char *funcname, int cond)
 119 {
 120     if (cond) {
 121         static int shown;
 122
 123         AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
 124         if (!shown) {
 125             shown = 1;
 126             AUD_log (NULL, "Save all your work and restart without audio\n");
 127             AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
 128             AUD_log (NULL, "I am sorry\n");
 129         }
 130         AUD_log (NULL, "Context:\n");
 131
 132 #if defined AUDIO_BREAKPOINT_ON_BUG
 133 #  if defined HOST_I386
 134 #    if defined __GNUC__
 135         __asm__ ("int3");
 136 #    elif defined _MSC_VER
 137         _asm _emit 0xcc;
 138 #    else
 139         abort ();
 140 #    endif
 141 #  else
 142         abort ();
 143 #  endif
 144 #endif
 145     }
 146
 147     return cond;
 148 }
 149 #endif
 150
 151 static inline int audio_bits_to_index (int bits)
 152 {
 153     switch (bits) {
 154     case 8:
 155         return 0;
 156
 157     case 16:
 158         return 1;
 159
 160     case 32:
 161         return 2;
 162
 163     default:
 164         audio_bug ("bits_to_index", 1);
 165         AUD_log (NULL, "invalid bits %d\n", bits);
 166         return 0;
 167     }
 168 }
 169
 170 void *audio_calloc (const char *funcname, int nmemb, size_t size)
 171 {
 172     int cond;
 173     size_t len;
 174
 175     len = nmemb * size;
 176     cond = !nmemb || !size;
 177     cond |= nmemb < 0;
 178     cond |= len < size;
 179
 180     if (audio_bug ("audio_calloc", cond)) {
 181         AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
 182                  funcname);
 183         AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
 184         return NULL;
 185     }
 186
 187     return qemu_mallocz (len);
 188 }
 189
 190 static char *audio_alloc_prefix (const char *s)
 191 {
 192     const char qemu_prefix[] = "QEMU_";
 193     size_t len, i;
 194     char *r, *u;
 195
 196     if (!s) {
 197         return NULL;
 198     }
 199
 200     len = strlen (s);
 201     r = qemu_malloc (len + sizeof (qemu_prefix));
 202
 203     u = r + sizeof (qemu_prefix) - 1;
 204
 205     pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
 206     pstrcat (r, len + sizeof (qemu_prefix), s);
 207
 208     for (i = 0; i < len; ++i) {
 209         u[i] = qemu_toupper(u[i]);
 210     }
 211
 212     return r;
 213 }
 214
 215 static const char *audio_audfmt_to_string (audfmt_e fmt)
 216 {
 217     switch (fmt) {
 218     case AUD_FMT_U8:
 219         return "U8";
 220
 221     case AUD_FMT_U16:
 222         return "U16";
 223
 224     case AUD_FMT_S8:
 225         return "S8";
 226
 227     case AUD_FMT_S16:
 228         return "S16";
 229
 230     case AUD_FMT_U32:
 231         return "U32";
 232
 233     case AUD_FMT_S32:
 234         return "S32";
 235     }
 236
 237     dolog ("Bogus audfmt %d returning S16\n", fmt);
 238     return "S16";
 239 }
 240
 241 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
 242                                         int *defaultp)
 243 {
 244     if (!strcasecmp (s, "u8")) {
 245         *defaultp = 0;
 246         return AUD_FMT_U8;
 247     }
 248     else if (!strcasecmp (s, "u16")) {
 249         *defaultp = 0;
 250         return AUD_FMT_U16;
 251     }
 252     else if (!strcasecmp (s, "u32")) {
 253         *defaultp = 0;
 254         return AUD_FMT_U32;
 255     }
 256     else if (!strcasecmp (s, "s8")) {
 257         *defaultp = 0;
 258         return AUD_FMT_S8;
 259     }
 260     else if (!strcasecmp (s, "s16")) {
 261         *defaultp = 0;
 262         return AUD_FMT_S16;
 263     }
 264     else if (!strcasecmp (s, "s32")) {
 265         *defaultp = 0;
 266         return AUD_FMT_S32;
 267     }
 268     else {
 269         dolog ("Bogus audio format `%s' using %s\n",
 270                s, audio_audfmt_to_string (defval));
 271         *defaultp = 1;
 272         return defval;
 273     }
 274 }
 275
 276 static audfmt_e audio_get_conf_fmt (const char *envname,
 277                                     audfmt_e defval,
 278                                     int *defaultp)
 279 {
 280     const char *var = getenv (envname);
 281     if (!var) {
 282         *defaultp = 1;
 283         return defval;
 284     }
 285     return audio_string_to_audfmt (var, defval, defaultp);
 286 }
 287
 288 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
 289 {
 290     int val;
 291     char *strval;
 292
 293     strval = getenv (key);
 294     if (strval) {
 295         *defaultp = 0;
 296         val = atoi (strval);
 297         return val;
 298     }
 299     else {
 300         *defaultp = 1;
 301         return defval;
 302     }
 303 }
 304
 305 static const char *audio_get_conf_str (const char *key,
 306                                        const char *defval,
 307                                        int *defaultp)
 308 {
 309     const char *val = getenv (key);
 310     if (!val) {
 311         *defaultp = 1;
 312         return defval;
 313     }
 314     else {
 315         *defaultp = 0;
 316         return val;
 317     }
 318 }
 319
 320 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
 321 {
 322     if (conf.log_to_monitor) {
 323         if (cap) {
 324             monitor_printf(cur_mon, "%s: ", cap);
 325         }
 326
 327         monitor_vprintf(cur_mon, fmt, ap);
 328     }
 329     else {
 330         if (cap) {
 331             fprintf (stderr, "%s: ", cap);
 332         }
 333
 334         vfprintf (stderr, fmt, ap);
 335     }
 336 }
 337
 338 void AUD_log (const char *cap, const char *fmt, ...)
 339 {
 340     va_list ap;
 341
 342     va_start (ap, fmt);
 343     AUD_vlog (cap, fmt, ap);
 344     va_end (ap);
 345 }
 346
 347 static void audio_print_options (const char *prefix,
 348                                  struct audio_option *opt)
 349 {
 350     char *uprefix;
 351
 352     if (!prefix) {
 353         dolog ("No prefix specified\n");
 354         return;
 355     }
 356
 357     if (!opt) {
 358         dolog ("No options\n");
 359         return;
 360     }
 361
 362     uprefix = audio_alloc_prefix (prefix);
 363
 364     for (; opt->name; opt++) {
 365         const char *state = "default";
 366         printf ("  %s_%s: ", uprefix, opt->name);
 367
 368         if (opt->overriddenp && *opt->overriddenp) {
 369             state = "current";
 370         }
 371
 372         switch (opt->tag) {
 373         case AUD_OPT_BOOL:
 374             {
 375                 int *intp = opt->valp;
 376                 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
 377             }
 378             break;
 379
 380         case AUD_OPT_INT:
 381             {
 382                 int *intp = opt->valp;
 383                 printf ("integer, %s = %d\n", state, *intp);
 384             }
 385             break;
 386
 387         case AUD_OPT_FMT:
 388             {
 389                 audfmt_e *fmtp = opt->valp;
 390                 printf (
 391                     "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
 392                     state,
 393                     audio_audfmt_to_string (*fmtp)
 394                     );
 395             }
 396             break;
 397
 398         case AUD_OPT_STR:
 399             {
 400                 const char **strp = opt->valp;
 401                 printf ("string, %s = %s\n",
 402                         state,
 403                         *strp ? *strp : "(not set)");
 404             }
 405             break;
 406
 407         default:
 408             printf ("???\n");
 409             dolog ("Bad value tag for option %s_%s %d\n",
 410                    uprefix, opt->name, opt->tag);
 411             break;
 412         }
 413         printf ("    %s\n", opt->descr);
 414     }
 415
 416     qemu_free (uprefix);
 417 }
 418
 419 static void audio_process_options (const char *prefix,
 420                                    struct audio_option *opt)
 421 {
 422     char *optname;
 423     const char qemu_prefix[] = "QEMU_";
 424     size_t preflen, optlen;
 425
 426     if (audio_bug (AUDIO_FUNC, !prefix)) {
 427         dolog ("prefix = NULL\n");
 428         return;
 429     }
 430
 431     if (audio_bug (AUDIO_FUNC, !opt)) {
 432         dolog ("opt = NULL\n");
 433         return;
 434     }
 435
 436     preflen = strlen (prefix);
 437
 438     for (; opt->name; opt++) {
 439         size_t len, i;
 440         int def;
 441
 442         if (!opt->valp) {
 443             dolog ("Option value pointer for `%s' is not set\n",
 444                    opt->name);
 445             continue;
 446         }
 447
 448         len = strlen (opt->name);
 449         /* len of opt->name + len of prefix + size of qemu_prefix
 450          * (includes trailing zero) + zero + underscore (on behalf of
 451          * sizeof) */
 452         optlen = len + preflen + sizeof (qemu_prefix) + 1;
 453         optname = qemu_malloc (optlen);
 454
 455         pstrcpy (optname, optlen, qemu_prefix);
 456
 457         /* copy while upper-casing, including trailing zero */
 458         for (i = 0; i <= preflen; ++i) {
 459             optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
 460         }
 461         pstrcat (optname, optlen, "_");
 462         pstrcat (optname, optlen, opt->name);
 463
 464         def = 1;
 465         switch (opt->tag) {
 466         case AUD_OPT_BOOL:
 467         case AUD_OPT_INT:
 468             {
 469                 int *intp = opt->valp;
 470                 *intp = audio_get_conf_int (optname, *intp, &def);
 471             }
 472             break;
 473
 474         case AUD_OPT_FMT:
 475             {
 476                 audfmt_e *fmtp = opt->valp;
 477                 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
 478             }
 479             break;
 480
 481         case AUD_OPT_STR:
 482             {
 483                 const char **strp = opt->valp;
 484                 *strp = audio_get_conf_str (optname, *strp, &def);
 485             }
 486             break;
 487
 488         default:
 489             dolog ("Bad value tag for option `%s' - %d\n",
 490                    optname, opt->tag);
 491             break;
 492         }
 493
 494         if (!opt->overriddenp) {
 495             opt->overriddenp = &opt->overridden;
 496         }
 497         *opt->overriddenp = !def;
 498         qemu_free (optname);
 499     }
 500 }
 501
 502 static void audio_print_settings (struct audsettings *as)
 503 {
 504     dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
 505
 506     switch (as->fmt) {
 507     case AUD_FMT_S8:
 508         AUD_log (NULL, "S8");
 509         break;
 510     case AUD_FMT_U8:
 511         AUD_log (NULL, "U8");
 512         break;
 513     case AUD_FMT_S16:
 514         AUD_log (NULL, "S16");
 515         break;
 516     case AUD_FMT_U16:
 517         AUD_log (NULL, "U16");
 518         break;
 519     case AUD_FMT_S32:
 520         AUD_log (NULL, "S32");
 521         break;
 522     case AUD_FMT_U32:
 523         AUD_log (NULL, "U32");
 524         break;
 525     default:
 526         AUD_log (NULL, "invalid(%d)", as->fmt);
 527         break;
 528     }
 529
 530     AUD_log (NULL, " endianness=");
 531     switch (as->endianness) {
 532     case 0:
 533         AUD_log (NULL, "little");
 534         break;
 535     case 1:
 536         AUD_log (NULL, "big");
 537         break;
 538     default:
 539         AUD_log (NULL, "invalid");
 540         break;
 541     }
 542     AUD_log (NULL, "\n");
 543 }
 544
 545 static int audio_validate_settings (struct audsettings *as)
 546 {
 547     int invalid;
 548
 549     invalid = as->nchannels != 1 && as->nchannels != 2;
 550     invalid |= as->endianness != 0 && as->endianness != 1;
 551
 552     switch (as->fmt) {
 553     case AUD_FMT_S8:
 554     case AUD_FMT_U8:
 555     case AUD_FMT_S16:
 556     case AUD_FMT_U16:
 557     case AUD_FMT_S32:
 558     case AUD_FMT_U32:
 559         break;
 560     default:
 561         invalid = 1;
 562         break;
 563     }
 564
 565     invalid |= as->freq <= 0;
 566     return invalid ? -1 : 0;
 567 }
 568
 569 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
 570 {
 571     int bits = 8, sign = 0;
 572
 573     switch (as->fmt) {
 574     case AUD_FMT_S8:
 575         sign = 1;
 576     case AUD_FMT_U8:
 577         break;
 578
 579     case AUD_FMT_S16:
 580         sign = 1;
 581     case AUD_FMT_U16:
 582         bits = 16;
 583         break;
 584
 585     case AUD_FMT_S32:
 586         sign = 1;
 587     case AUD_FMT_U32:
 588         bits = 32;
 589         break;
 590     }
 591     return info->freq == as->freq
 592         && info->nchannels == as->nchannels
 593         && info->sign == sign
 594         && info->bits == bits
 595         && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
 596 }
 597
 598 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
 599 {
 600     int bits = 8, sign = 0, shift = 0;
 601
 602     switch (as->fmt) {
 603     case AUD_FMT_S8:
 604         sign = 1;
 605     case AUD_FMT_U8:
 606         break;
 607
 608     case AUD_FMT_S16:
 609         sign = 1;
 610     case AUD_FMT_U16:
 611         bits = 16;
 612         shift = 1;
 613         break;
 614
 615     case AUD_FMT_S32:
 616         sign = 1;
 617     case AUD_FMT_U32:
 618         bits = 32;
 619         shift = 2;
 620         break;
 621     }
 622
 623     info->freq = as->freq;
 624     info->bits = bits;
 625     info->sign = sign;
 626     info->nchannels = as->nchannels;
 627     info->shift = (as->nchannels == 2) + shift;
 628     info->align = (1 << info->shift) - 1;
 629     info->bytes_per_second = info->freq << info->shift;
 630     info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
 631 }
 632
 633 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
 634 {
 635     if (!len) {
 636         return;
 637     }
 638
 639     if (info->sign) {
 640         memset (buf, 0x00, len << info->shift);
 641     }
 642     else {
 643         switch (info->bits) {
 644         case 8:
 645             memset (buf, 0x80, len << info->shift);
 646             break;
 647
 648         case 16:
 649             {
 650                 int i;
 651                 uint16_t *p = buf;
 652                 int shift = info->nchannels - 1;
 653                 short s = INT16_MAX;
 654
 655                 if (info->swap_endianness) {
 656                     s = bswap16 (s);
 657                 }
 658
 659                 for (i = 0; i < len << shift; i++) {
 660                     p[i] = s;
 661                 }
 662             }
 663             break;
 664
 665         case 32:
 666             {
 667                 int i;
 668                 uint32_t *p = buf;
 669                 int shift = info->nchannels - 1;
 670                 int32_t s = INT32_MAX;
 671
 672                 if (info->swap_endianness) {
 673                     s = bswap32 (s);
 674                 }
 675
 676                 for (i = 0; i < len << shift; i++) {
 677                     p[i] = s;
 678                 }
 679             }
 680             break;
 681
 682         default:
 683             AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
 684                      info->bits);
 685             break;
 686         }
 687     }
 688 }
 689
 690 /*
 691  * Capture
 692  */
 693 static void noop_conv (struct st_sample *dst, const void *src,
 694                        int samples, struct mixeng_volume *vol)
 695 {
 696     (void) src;
 697     (void) dst;
 698     (void) samples;
 699     (void) vol;
 700 }
 701
 702 static CaptureVoiceOut *audio_pcm_capture_find_specific (
 703     struct audsettings *as
 704     )
 705 {
 706     CaptureVoiceOut *cap;
 707     AudioState *s = &glob_audio_state;
 708
 709     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 710         if (audio_pcm_info_eq (&cap->hw.info, as)) {
 711             return cap;
 712         }
 713     }
 714     return NULL;
 715 }
 716
 717 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
 718 {
 719     struct capture_callback *cb;
 720
 721 #ifdef DEBUG_CAPTURE
 722     dolog ("notification %d sent\n", cmd);
 723 #endif
 724     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
 725         cb->ops.notify (cb->opaque, cmd);
 726     }
 727 }
 728
 729 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
 730 {
 731     if (cap->hw.enabled != enabled) {
 732         audcnotification_e cmd;
 733         cap->hw.enabled = enabled;
 734         cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
 735         audio_notify_capture (cap, cmd);
 736     }
 737 }
 738
 739 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
 740 {
 741     HWVoiceOut *hw = &cap->hw;
 742     SWVoiceOut *sw;
 743     int enabled = 0;
 744
 745     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 746         if (sw->active) {
 747             enabled = 1;
 748             break;
 749         }
 750     }
 751     audio_capture_maybe_changed (cap, enabled);
 752 }
 753
 754 static void audio_detach_capture (HWVoiceOut *hw)
 755 {
 756     SWVoiceCap *sc = hw->cap_head.lh_first;
 757
 758     while (sc) {
 759         SWVoiceCap *sc1 = sc->entries.le_next;
 760         SWVoiceOut *sw = &sc->sw;
 761         CaptureVoiceOut *cap = sc->cap;
 762         int was_active = sw->active;
 763
 764         if (sw->rate) {
 765             st_rate_stop (sw->rate);
 766             sw->rate = NULL;
 767         }
 768
 769         QLIST_REMOVE (sw, entries);
 770         QLIST_REMOVE (sc, entries);
 771         qemu_free (sc);
 772         if (was_active) {
 773             /* We have removed soft voice from the capture:
 774                this might have changed the overall status of the capture
 775                since this might have been the only active voice */
 776             audio_recalc_and_notify_capture (cap);
 777         }
 778         sc = sc1;
 779     }
 780 }
 781
 782 static int audio_attach_capture (HWVoiceOut *hw)
 783 {
 784     AudioState *s = &glob_audio_state;
 785     CaptureVoiceOut *cap;
 786
 787     audio_detach_capture (hw);
 788     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
 789         SWVoiceCap *sc;
 790         SWVoiceOut *sw;
 791         HWVoiceOut *hw_cap = &cap->hw;
 792
 793         sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
 794         if (!sc) {
 795             dolog ("Could not allocate soft capture voice (%zu bytes)\n",
 796                    sizeof (*sc));
 797             return -1;
 798         }
 799
 800         sc->cap = cap;
 801         sw = &sc->sw;
 802         sw->hw = hw_cap;
 803         sw->info = hw->info;
 804         sw->empty = 1;
 805         sw->active = hw->enabled;
 806         sw->conv = noop_conv;
 807         sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
 808         sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
 809         if (!sw->rate) {
 810             dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
 811             qemu_free (sw);
 812             return -1;
 813         }
 814         QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
 815         QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
 816 #ifdef DEBUG_CAPTURE
 817         asprintf (&sw->name, "for %p %d,%d,%d",
 818                   hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
 819         dolog ("Added %s active = %d\n", sw->name, sw->active);
 820 #endif
 821         if (sw->active) {
 822             audio_capture_maybe_changed (cap, 1);
 823         }
 824     }
 825     return 0;
 826 }
 827
 828 /*
 829  * Hard voice (capture)
 830  */
 831 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
 832 {
 833     SWVoiceIn *sw;
 834     int m = hw->total_samples_captured;
 835
 836     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 837         if (sw->active) {
 838             m = audio_MIN (m, sw->total_hw_samples_acquired);
 839         }
 840     }
 841     return m;
 842 }
 843
 844 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
 845 {
 846     int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
 847     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 848         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 849         return 0;
 850     }
 851     return live;
 852 }
 853
 854 /*
 855  * Soft voice (capture)
 856  */
 857 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 858 {
 859     HWVoiceIn *hw = sw->hw;
 860     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 861     int rpos;
 862
 863     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 864         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 865         return 0;
 866     }
 867
 868     rpos = hw->wpos - live;
 869     if (rpos >= 0) {
 870         return rpos;
 871     }
 872     else {
 873         return hw->samples + rpos;
 874     }
 875 }
 876
 877 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 878 {
 879     HWVoiceIn *hw = sw->hw;
 880     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 881     struct st_sample *src, *dst = sw->buf;
 882
 883     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 884
 885     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 886     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 887         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 888         return 0;
 889     }
 890
 891     samples = size >> sw->info.shift;
 892     if (!live) {
 893         return 0;
 894     }
 895
 896     swlim = (live * sw->ratio) >> 32;
 897     swlim = audio_MIN (swlim, samples);
 898
 899     while (swlim) {
 900         src = hw->conv_buf + rpos;
 901         isamp = hw->wpos - rpos;
 902         /* XXX: <= ? */
 903         if (isamp <= 0) {
 904             isamp = hw->samples - rpos;
 905         }
 906
 907         if (!isamp) {
 908             break;
 909         }
 910         osamp = swlim;
 911
 912         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 913             dolog ("osamp=%d\n", osamp);
 914             return 0;
 915         }
 916
 917         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 918         swlim -= osamp;
 919         rpos = (rpos + isamp) % hw->samples;
 920         dst += osamp;
 921         ret += osamp;
 922         total += isamp;
 923     }
 924
 925     sw->clip (buf, sw->buf, ret);
 926     sw->total_hw_samples_acquired += total;
 927     return ret << sw->info.shift;
 928 }
 929
 930 /*
 931  * Hard voice (playback)
 932  */
 933 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 934 {
 935     SWVoiceOut *sw;
 936     int m = INT_MAX;
 937     int nb_live = 0;
 938
 939     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 940         if (sw->active || !sw->empty) {
 941             m = audio_MIN (m, sw->total_hw_samples_mixed);
 942             nb_live += 1;
 943         }
 944     }
 945
 946     *nb_livep = nb_live;
 947     return m;
 948 }
 949
 950 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
 951 {
 952     int smin;
 953
 954     smin = audio_pcm_hw_find_min_out (hw, nb_live);
 955
 956     if (!*nb_live) {
 957         return 0;
 958     }
 959     else {
 960         int live = smin;
 961
 962         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 963             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 964             return 0;
 965         }
 966         return live;
 967     }
 968 }
 969
 970 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
 971 {
 972     int nb_live;
 973     int live;
 974
 975     live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
 976     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 977         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 978         return 0;
 979     }
 980     return live;
 981 }
 982
 983 /*
 984  * Soft voice (playback)
 985  */
 986 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 987 {
 988     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
 989     int ret = 0, pos = 0, total = 0;
 990
 991     if (!sw) {
 992         return size;
 993     }
 994
 995     hwsamples = sw->hw->samples;
 996
 997     live = sw->total_hw_samples_mixed;
 998     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
 999         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1000         return 0;
1001     }
1002
1003     if (live == hwsamples) {
1004 #ifdef DEBUG_OUT
1005         dolog ("%s is full %d\n", sw->name, live);
1006 #endif
1007         return 0;
1008     }
1009
1010     wpos = (sw->hw->rpos + live) % hwsamples;
1011     samples = size >> sw->info.shift;
1012
1013     dead = hwsamples - live;
1014     swlim = ((int64_t) dead << 32) / sw->ratio;
1015     swlim = audio_MIN (swlim, samples);
1016     if (swlim) {
1017         sw->conv (sw->buf, buf, swlim, &sw->vol);
1018     }
1019
1020     while (swlim) {
1021         dead = hwsamples - live;
1022         left = hwsamples - wpos;
1023         blck = audio_MIN (dead, left);
1024         if (!blck) {
1025             break;
1026         }
1027         isamp = swlim;
1028         osamp = blck;
1029         st_rate_flow_mix (
1030             sw->rate,
1031             sw->buf + pos,
1032             sw->hw->mix_buf + wpos,
1033             &isamp,
1034             &osamp
1035             );
1036         ret += isamp;
1037         swlim -= isamp;
1038         pos += isamp;
1039         live += osamp;
1040         wpos = (wpos + osamp) % hwsamples;
1041         total += osamp;
1042     }
1043
1044     sw->total_hw_samples_mixed += total;
1045     sw->empty = sw->total_hw_samples_mixed == 0;
1046
1047 #ifdef DEBUG_OUT
1048     dolog (
1049         "%s: write size %d ret %d total sw %d\n",
1050         SW_NAME (sw),
1051         size >> sw->info.shift,
1052         ret,
1053         sw->total_hw_samples_mixed
1054         );
1055 #endif
1056
1057     return ret << sw->info.shift;
1058 }
1059
1060 #ifdef DEBUG_AUDIO
1061 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1062 {
1063     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1064            cap, info->bits, info->sign, info->freq, info->nchannels);
1065 }
1066 #endif
1067
1068 #define DAC
1069 #include "audio_template.h"
1070 #undef DAC
1071 #include "audio_template.h"
1072
1073 /*
1074  * Timer
1075  */
1076 static void audio_timer (void *opaque)
1077 {
1078     AudioState *s = opaque;
1079
1080     audio_run ("timer");
1081     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1082 }
1083
1084
1085 static int audio_is_timer_needed (void)
1086 {
1087     HWVoiceIn *hwi = NULL;
1088     HWVoiceOut *hwo = NULL;
1089
1090     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1091         if (!hwo->poll_mode) return 1;
1092     }
1093     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1094         if (!hwi->poll_mode) return 1;
1095     }
1096     return 0;
1097 }
1098
1099 static void audio_reset_timer (void)
1100 {
1101     AudioState *s = &glob_audio_state;
1102
1103     if (audio_is_timer_needed ()) {
1104         qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
1105     }
1106     else {
1107         qemu_del_timer (s->ts);
1108     }
1109 }
1110
1111 /*
1112  * Public API
1113  */
1114 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1115 {
1116     int bytes;
1117
1118     if (!sw) {
1119         /* XXX: Consider options */
1120         return size;
1121     }
1122
1123     if (!sw->hw->enabled) {
1124         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1125         return 0;
1126     }
1127
1128     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1129     return bytes;
1130 }
1131
1132 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1133 {
1134     int bytes;
1135
1136     if (!sw) {
1137         /* XXX: Consider options */
1138         return size;
1139     }
1140
1141     if (!sw->hw->enabled) {
1142         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1143         return 0;
1144     }
1145
1146     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1147     return bytes;
1148 }
1149
1150 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1151 {
1152     return sw->hw->samples << sw->hw->info.shift;
1153 }
1154
1155 void AUD_set_active_out (SWVoiceOut *sw, int on)
1156 {
1157     HWVoiceOut *hw;
1158
1159     if (!sw) {
1160         return;
1161     }
1162
1163     hw = sw->hw;
1164     if (sw->active != on) {
1165         AudioState *s = &glob_audio_state;
1166         SWVoiceOut *temp_sw;
1167         SWVoiceCap *sc;
1168
1169         if (on) {
1170             hw->pending_disable = 0;
1171             if (!hw->enabled) {
1172                 hw->enabled = 1;
1173                 if (s->vm_running) {
1174                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1175                     audio_reset_timer ();
1176                 }
1177             }
1178         }
1179         else {
1180             if (hw->enabled) {
1181                 int nb_active = 0;
1182
1183                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1184                      temp_sw = temp_sw->entries.le_next) {
1185                     nb_active += temp_sw->active != 0;
1186                 }
1187
1188                 hw->pending_disable = nb_active == 1;
1189             }
1190         }
1191
1192         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1193             sc->sw.active = hw->enabled;
1194             if (hw->enabled) {
1195                 audio_capture_maybe_changed (sc->cap, 1);
1196             }
1197         }
1198         sw->active = on;
1199     }
1200 }
1201
1202 void AUD_set_active_in (SWVoiceIn *sw, int on)
1203 {
1204     HWVoiceIn *hw;
1205
1206     if (!sw) {
1207         return;
1208     }
1209
1210     hw = sw->hw;
1211     if (sw->active != on) {
1212         AudioState *s = &glob_audio_state;
1213         SWVoiceIn *temp_sw;
1214
1215         if (on) {
1216             if (!hw->enabled) {
1217                 hw->enabled = 1;
1218                 if (s->vm_running) {
1219                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1220                 }
1221             }
1222             sw->total_hw_samples_acquired = hw->total_samples_captured;
1223         }
1224         else {
1225             if (hw->enabled) {
1226                 int nb_active = 0;
1227
1228                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1229                      temp_sw = temp_sw->entries.le_next) {
1230                     nb_active += temp_sw->active != 0;
1231                 }
1232
1233                 if (nb_active == 1) {
1234                     hw->enabled = 0;
1235                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1236                 }
1237             }
1238         }
1239         sw->active = on;
1240     }
1241 }
1242
1243 static int audio_get_avail (SWVoiceIn *sw)
1244 {
1245     int live;
1246
1247     if (!sw) {
1248         return 0;
1249     }
1250
1251     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1252     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1253         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1254         return 0;
1255     }
1256
1257     ldebug (
1258         "%s: get_avail live %d ret %" PRId64 "\n",
1259         SW_NAME (sw),
1260         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1261         );
1262
1263     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1264 }
1265
1266 static int audio_get_free (SWVoiceOut *sw)
1267 {
1268     int live, dead;
1269
1270     if (!sw) {
1271         return 0;
1272     }
1273
1274     live = sw->total_hw_samples_mixed;
1275
1276     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1277         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1278         return 0;
1279     }
1280
1281     dead = sw->hw->samples - live;
1282
1283 #ifdef DEBUG_OUT
1284     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1285            SW_NAME (sw),
1286            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1287 #endif
1288
1289     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1290 }
1291
1292 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1293 {
1294     int n;
1295
1296     if (hw->enabled) {
1297         SWVoiceCap *sc;
1298
1299         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1300             SWVoiceOut *sw = &sc->sw;
1301             int rpos2 = rpos;
1302
1303             n = samples;
1304             while (n) {
1305                 int till_end_of_hw = hw->samples - rpos2;
1306                 int to_write = audio_MIN (till_end_of_hw, n);
1307                 int bytes = to_write << hw->info.shift;
1308                 int written;
1309
1310                 sw->buf = hw->mix_buf + rpos2;
1311                 written = audio_pcm_sw_write (sw, NULL, bytes);
1312                 if (written - bytes) {
1313                     dolog ("Could not mix %d bytes into a capture "
1314                            "buffer, mixed %d\n",
1315                            bytes, written);
1316                     break;
1317                 }
1318                 n -= to_write;
1319                 rpos2 = (rpos2 + to_write) % hw->samples;
1320             }
1321         }
1322     }
1323
1324     n = audio_MIN (samples, hw->samples - rpos);
1325     mixeng_clear (hw->mix_buf + rpos, n);
1326     mixeng_clear (hw->mix_buf, samples - n);
1327 }
1328
1329 static void audio_run_out (AudioState *s)
1330 {
1331     HWVoiceOut *hw = NULL;
1332     SWVoiceOut *sw;
1333
1334     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1335         int played;
1336         int live, free, nb_live, cleanup_required, prev_rpos;
1337
1338         live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1339         if (!nb_live) {
1340             live = 0;
1341         }
1342
1343         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1344             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1345             continue;
1346         }
1347
1348         if (hw->pending_disable && !nb_live) {
1349             SWVoiceCap *sc;
1350 #ifdef DEBUG_OUT
1351             dolog ("Disabling voice\n");
1352 #endif
1353             hw->enabled = 0;
1354             hw->pending_disable = 0;
1355             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1356             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1357                 sc->sw.active = 0;
1358                 audio_recalc_and_notify_capture (sc->cap);
1359             }
1360             continue;
1361         }
1362
1363         if (!live) {
1364             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1365                 if (sw->active) {
1366                     free = audio_get_free (sw);
1367                     if (free > 0) {
1368                         sw->callback.fn (sw->callback.opaque, free);
1369                     }
1370                 }
1371             }
1372             continue;
1373         }
1374
1375         prev_rpos = hw->rpos;
1376         played = hw->pcm_ops->run_out (hw);
1377         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1378             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1379                    hw->rpos, hw->samples, played);
1380             hw->rpos = 0;
1381         }
1382
1383 #ifdef DEBUG_OUT
1384         dolog ("played=%d\n", played);
1385 #endif
1386
1387         if (played) {
1388             hw->ts_helper += played;
1389             audio_capture_mix_and_clear (hw, prev_rpos, played);
1390         }
1391
1392         cleanup_required = 0;
1393         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1394             if (!sw->active && sw->empty) {
1395                 continue;
1396             }
1397
1398             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1399                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1400                        played, sw->total_hw_samples_mixed);
1401                 played = sw->total_hw_samples_mixed;
1402             }
1403
1404             sw->total_hw_samples_mixed -= played;
1405
1406             if (!sw->total_hw_samples_mixed) {
1407                 sw->empty = 1;
1408                 cleanup_required |= !sw->active && !sw->callback.fn;
1409             }
1410
1411             if (sw->active) {
1412                 free = audio_get_free (sw);
1413                 if (free > 0) {
1414                     sw->callback.fn (sw->callback.opaque, free);
1415                 }
1416             }
1417         }
1418
1419         if (cleanup_required) {
1420             SWVoiceOut *sw1;
1421
1422             sw = hw->sw_head.lh_first;
1423             while (sw) {
1424                 sw1 = sw->entries.le_next;
1425                 if (!sw->active && !sw->callback.fn) {
1426 #ifdef DEBUG_PLIVE
1427                     dolog ("Finishing with old voice\n");
1428 #endif
1429                     audio_close_out (sw);
1430                 }
1431                 sw = sw1;
1432             }
1433         }
1434     }
1435 }
1436
1437 static void audio_run_in (AudioState *s)
1438 {
1439     HWVoiceIn *hw = NULL;
1440
1441     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1442         SWVoiceIn *sw;
1443         int captured, min;
1444
1445         captured = hw->pcm_ops->run_in (hw);
1446
1447         min = audio_pcm_hw_find_min_in (hw);
1448         hw->total_samples_captured += captured - min;
1449         hw->ts_helper += captured;
1450
1451         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1452             sw->total_hw_samples_acquired -= min;
1453
1454             if (sw->active) {
1455                 int avail;
1456
1457                 avail = audio_get_avail (sw);
1458                 if (avail > 0) {
1459                     sw->callback.fn (sw->callback.opaque, avail);
1460                 }
1461             }
1462         }
1463     }
1464 }
1465
1466 static void audio_run_capture (AudioState *s)
1467 {
1468     CaptureVoiceOut *cap;
1469
1470     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1471         int live, rpos, captured;
1472         HWVoiceOut *hw = &cap->hw;
1473         SWVoiceOut *sw;
1474
1475         captured = live = audio_pcm_hw_get_live_out (hw);
1476         rpos = hw->rpos;
1477         while (live) {
1478             int left = hw->samples - rpos;
1479             int to_capture = audio_MIN (live, left);
1480             struct st_sample *src;
1481             struct capture_callback *cb;
1482
1483             src = hw->mix_buf + rpos;
1484             hw->clip (cap->buf, src, to_capture);
1485             mixeng_clear (src, to_capture);
1486
1487             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1488                 cb->ops.capture (cb->opaque, cap->buf,
1489                                  to_capture << hw->info.shift);
1490             }
1491             rpos = (rpos + to_capture) % hw->samples;
1492             live -= to_capture;
1493         }
1494         hw->rpos = rpos;
1495
1496         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1497             if (!sw->active && sw->empty) {
1498                 continue;
1499             }
1500
1501             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1502                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1503                        captured, sw->total_hw_samples_mixed);
1504                 captured = sw->total_hw_samples_mixed;
1505             }
1506
1507             sw->total_hw_samples_mixed -= captured;
1508             sw->empty = sw->total_hw_samples_mixed == 0;
1509         }
1510     }
1511 }
1512
1513 void audio_run (const char *msg)
1514 {
1515     AudioState *s = &glob_audio_state;
1516
1517     audio_run_out (s);
1518     audio_run_in (s);
1519     audio_run_capture (s);
1520 #ifdef DEBUG_POLL
1521     {
1522         static double prevtime;
1523         double currtime;
1524         struct timeval tv;
1525
1526         if (gettimeofday (&tv, NULL)) {
1527             perror ("audio_run: gettimeofday");
1528             return;
1529         }
1530
1531         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1532         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1533         prevtime = currtime;
1534     }
1535 #endif
1536 }
1537
1538 static struct audio_option audio_options[] = {
1539     /* DAC */
1540     {
1541         .name  = "DAC_FIXED_SETTINGS",
1542         .tag   = AUD_OPT_BOOL,
1543         .valp  = &conf.fixed_out.enabled,
1544         .descr = "Use fixed settings for host DAC"
1545     },
1546     {
1547         .name  = "DAC_FIXED_FREQ",
1548         .tag   = AUD_OPT_INT,
1549         .valp  = &conf.fixed_out.settings.freq,
1550         .descr = "Frequency for fixed host DAC"
1551     },
1552     {
1553         .name  = "DAC_FIXED_FMT",
1554         .tag   = AUD_OPT_FMT,
1555         .valp  = &conf.fixed_out.settings.fmt,
1556         .descr = "Format for fixed host DAC"
1557     },
1558     {
1559         .name  = "DAC_FIXED_CHANNELS",
1560         .tag   = AUD_OPT_INT,
1561         .valp  = &conf.fixed_out.settings.nchannels,
1562         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1563     },
1564     {
1565         .name  = "DAC_VOICES",
1566         .tag   = AUD_OPT_INT,
1567         .valp  = &conf.fixed_out.nb_voices,
1568         .descr = "Number of voices for DAC"
1569     },
1570     {
1571         .name  = "DAC_TRY_POLL",
1572         .tag   = AUD_OPT_BOOL,
1573         .valp  = &conf.try_poll_out,
1574         .descr = "Attempt using poll mode for DAC"
1575     },
1576     /* ADC */
1577     {
1578         .name  = "ADC_FIXED_SETTINGS",
1579         .tag   = AUD_OPT_BOOL,
1580         .valp  = &conf.fixed_in.enabled,
1581         .descr = "Use fixed settings for host ADC"
1582     },
1583     {
1584         .name  = "ADC_FIXED_FREQ",
1585         .tag   = AUD_OPT_INT,
1586         .valp  = &conf.fixed_in.settings.freq,
1587         .descr = "Frequency for fixed host ADC"
1588     },
1589     {
1590         .name  = "ADC_FIXED_FMT",
1591         .tag   = AUD_OPT_FMT,
1592         .valp  = &conf.fixed_in.settings.fmt,
1593         .descr = "Format for fixed host ADC"
1594     },
1595     {
1596         .name  = "ADC_FIXED_CHANNELS",
1597         .tag   = AUD_OPT_INT,
1598         .valp  = &conf.fixed_in.settings.nchannels,
1599         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1600     },
1601     {
1602         .name  = "ADC_VOICES",
1603         .tag   = AUD_OPT_INT,
1604         .valp  = &conf.fixed_in.nb_voices,
1605         .descr = "Number of voices for ADC"
1606     },
1607     {
1608         .name  = "ADC_TRY_POLL",
1609         .tag   = AUD_OPT_BOOL,
1610         .valp  = &conf.try_poll_in,
1611         .descr = "Attempt using poll mode for ADC"
1612     },
1613     /* Misc */
1614     {
1615         .name  = "TIMER_PERIOD",
1616         .tag   = AUD_OPT_INT,
1617         .valp  = &conf.period.hertz,
1618         .descr = "Timer period in HZ (0 - use lowest possible)"
1619     },
1620     {
1621         .name  = "PLIVE",
1622         .tag   = AUD_OPT_BOOL,
1623         .valp  = &conf.plive,
1624         .descr = "(undocumented)"
1625     },
1626     {
1627         .name  = "LOG_TO_MONITOR",
1628         .tag   = AUD_OPT_BOOL,
1629         .valp  = &conf.log_to_monitor,
1630         .descr = "Print logging messages to monitor instead of stderr"
1631     },
1632     { /* End of list */ }
1633 };
1634
1635 static void audio_pp_nb_voices (const char *typ, int nb)
1636 {
1637     switch (nb) {
1638     case 0:
1639         printf ("Does not support %s\n", typ);
1640         break;
1641     case 1:
1642         printf ("One %s voice\n", typ);
1643         break;
1644     case INT_MAX:
1645         printf ("Theoretically supports many %s voices\n", typ);
1646         break;
1647     default:
1648         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1649         break;
1650     }
1651
1652 }
1653
1654 void AUD_help (void)
1655 {
1656     size_t i;
1657
1658     audio_process_options ("AUDIO", audio_options);
1659     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1660         struct audio_driver *d = drvtab[i];
1661         if (d->options) {
1662             audio_process_options (d->name, d->options);
1663         }
1664     }
1665
1666     printf ("Audio options:\n");
1667     audio_print_options ("AUDIO", audio_options);
1668     printf ("\n");
1669
1670     printf ("Available drivers:\n");
1671
1672     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1673         struct audio_driver *d = drvtab[i];
1674
1675         printf ("Name: %s\n", d->name);
1676         printf ("Description: %s\n", d->descr);
1677
1678         audio_pp_nb_voices ("playback", d->max_voices_out);
1679         audio_pp_nb_voices ("capture", d->max_voices_in);
1680
1681         if (d->options) {
1682             printf ("Options:\n");
1683             audio_print_options (d->name, d->options);
1684         }
1685         else {
1686             printf ("No options\n");
1687         }
1688         printf ("\n");
1689     }
1690
1691     printf (
1692         "Options are settable through environment variables.\n"
1693         "Example:\n"
1694 #ifdef _WIN32
1695         "  set QEMU_AUDIO_DRV=wav\n"
1696         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1697 #else
1698         "  export QEMU_AUDIO_DRV=wav\n"
1699         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1700         "(for csh replace export with setenv in the above)\n"
1701 #endif
1702         "  qemu ...\n\n"
1703         );
1704 }
1705
1706 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1707 {
1708     if (drv->options) {
1709         audio_process_options (drv->name, drv->options);
1710     }
1711     s->drv_opaque = drv->init ();
1712
1713     if (s->drv_opaque) {
1714         audio_init_nb_voices_out (drv);
1715         audio_init_nb_voices_in (drv);
1716         s->drv = drv;
1717         return 0;
1718     }
1719     else {
1720         dolog ("Could not init `%s' audio driver\n", drv->name);
1721         return -1;
1722     }
1723 }
1724
1725 static void audio_vm_change_state_handler (void *opaque, int running,
1726                                            int reason)
1727 {
1728     AudioState *s = opaque;
1729     HWVoiceOut *hwo = NULL;
1730     HWVoiceIn *hwi = NULL;
1731     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1732
1733     s->vm_running = running;
1734     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1735         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1736     }
1737
1738     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1739         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1740     }
1741     audio_reset_timer ();
1742 }
1743
1744 static void audio_atexit (void)
1745 {
1746     AudioState *s = &glob_audio_state;
1747     HWVoiceOut *hwo = NULL;
1748     HWVoiceIn *hwi = NULL;
1749
1750     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1751         SWVoiceCap *sc;
1752
1753         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1754         hwo->pcm_ops->fini_out (hwo);
1755
1756         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1757             CaptureVoiceOut *cap = sc->cap;
1758             struct capture_callback *cb;
1759
1760             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1761                 cb->ops.destroy (cb->opaque);
1762             }
1763         }
1764     }
1765
1766     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1767         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1768         hwi->pcm_ops->fini_in (hwi);
1769     }
1770
1771     if (s->drv) {
1772         s->drv->fini (s->drv_opaque);
1773     }
1774 }
1775
1776 static void audio_save (QEMUFile *f, void *opaque)
1777 {
1778     (void) f;
1779     (void) opaque;
1780 }
1781
1782 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1783 {
1784     (void) f;
1785     (void) opaque;
1786
1787     if (version_id != 1) {
1788         return -EINVAL;
1789     }
1790
1791     return 0;
1792 }
1793
1794 static void audio_init (void)
1795 {
1796     size_t i;
1797     int done = 0;
1798     const char *drvname;
1799     VMChangeStateEntry *e;
1800     AudioState *s = &glob_audio_state;
1801
1802     if (s->drv) {
1803         return;
1804     }
1805
1806     QLIST_INIT (&s->hw_head_out);
1807     QLIST_INIT (&s->hw_head_in);
1808     QLIST_INIT (&s->cap_head);
1809     atexit (audio_atexit);
1810
1811     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1812     if (!s->ts) {
1813         hw_error("Could not create audio timer\n");
1814     }
1815
1816     audio_process_options ("AUDIO", audio_options);
1817
1818     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1819     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1820
1821     if (s->nb_hw_voices_out <= 0) {
1822         dolog ("Bogus number of playback voices %d, setting to 1\n",
1823                s->nb_hw_voices_out);
1824         s->nb_hw_voices_out = 1;
1825     }
1826
1827     if (s->nb_hw_voices_in <= 0) {
1828         dolog ("Bogus number of capture voices %d, setting to 0\n",
1829                s->nb_hw_voices_in);
1830         s->nb_hw_voices_in = 0;
1831     }
1832
1833     {
1834         int def;
1835         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1836     }
1837
1838     if (drvname) {
1839         int found = 0;
1840
1841         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1842             if (!strcmp (drvname, drvtab[i]->name)) {
1843                 done = !audio_driver_init (s, drvtab[i]);
1844                 found = 1;
1845                 break;
1846             }
1847         }
1848
1849         if (!found) {
1850             dolog ("Unknown audio driver `%s'\n", drvname);
1851             dolog ("Run with -audio-help to list available drivers\n");
1852         }
1853     }
1854
1855     if (!done) {
1856         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1857             if (drvtab[i]->can_be_default) {
1858                 done = !audio_driver_init (s, drvtab[i]);
1859             }
1860         }
1861     }
1862
1863     if (!done) {
1864         done = !audio_driver_init (s, &no_audio_driver);
1865         if (!done) {
1866             hw_error("Could not initialize audio subsystem\n");
1867         }
1868         else {
1869             dolog ("warning: Using timer based audio emulation\n");
1870         }
1871     }
1872
1873     if (conf.period.hertz <= 0) {
1874         if (conf.period.hertz < 0) {
1875             dolog ("warning: Timer period is negative - %d "
1876                    "treating as zero\n",
1877                    conf.period.hertz);
1878         }
1879         conf.period.ticks = 1;
1880     } else {
1881         conf.period.ticks = get_ticks_per_sec() / conf.period.hertz;
1882     }
1883
1884     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1885     if (!e) {
1886         dolog ("warning: Could not register change state handler\n"
1887                "(Audio can continue looping even after stopping the VM)\n");
1888     }
1889
1890     QLIST_INIT (&s->card_head);
1891     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1892 }
1893
1894 void AUD_register_card (const char *name, QEMUSoundCard *card)
1895 {
1896     audio_init ();
1897     card->name = qemu_strdup (name);
1898     memset (&card->entries, 0, sizeof (card->entries));
1899     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1900 }
1901
1902 void AUD_remove_card (QEMUSoundCard *card)
1903 {
1904     QLIST_REMOVE (card, entries);
1905     qemu_free (card->name);
1906 }
1907
1908
1909 CaptureVoiceOut *AUD_add_capture (
1910     struct audsettings *as,
1911     struct audio_capture_ops *ops,
1912     void *cb_opaque
1913     )
1914 {
1915     AudioState *s = &glob_audio_state;
1916     CaptureVoiceOut *cap;
1917     struct capture_callback *cb;
1918
1919     if (audio_validate_settings (as)) {
1920         dolog ("Invalid settings were passed when trying to add capture\n");
1921         audio_print_settings (as);
1922         goto err0;
1923     }
1924
1925     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1926     if (!cb) {
1927         dolog ("Could not allocate capture callback information, size %zu\n",
1928                sizeof (*cb));
1929         goto err0;
1930     }
1931     cb->ops = *ops;
1932     cb->opaque = cb_opaque;
1933
1934     cap = audio_pcm_capture_find_specific (as);
1935     if (cap) {
1936         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1937         return cap;
1938     }
1939     else {
1940         HWVoiceOut *hw;
1941         CaptureVoiceOut *cap;
1942
1943         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1944         if (!cap) {
1945             dolog ("Could not allocate capture voice, size %zu\n",
1946                    sizeof (*cap));
1947             goto err1;
1948         }
1949
1950         hw = &cap->hw;
1951         QLIST_INIT (&hw->sw_head);
1952         QLIST_INIT (&cap->cb_head);
1953
1954         /* XXX find a more elegant way */
1955         hw->samples = 4096 * 4;
1956         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1957                                     sizeof (struct st_sample));
1958         if (!hw->mix_buf) {
1959             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1960                    hw->samples);
1961             goto err2;
1962         }
1963
1964         audio_pcm_init_info (&hw->info, as);
1965
1966         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1967         if (!cap->buf) {
1968             dolog ("Could not allocate capture buffer "
1969                    "(%d samples, each %d bytes)\n",
1970                    hw->samples, 1 << hw->info.shift);
1971             goto err3;
1972         }
1973
1974         hw->clip = mixeng_clip
1975             [hw->info.nchannels == 2]
1976             [hw->info.sign]
1977             [hw->info.swap_endianness]
1978             [audio_bits_to_index (hw->info.bits)];
1979
1980         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1981         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1982
1983         hw = NULL;
1984         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1985             audio_attach_capture (hw);
1986         }
1987         return cap;
1988
1989     err3:
1990         qemu_free (cap->hw.mix_buf);
1991     err2:
1992         qemu_free (cap);
1993     err1:
1994         qemu_free (cb);
1995     err0:
1996         return NULL;
1997     }
1998 }
1999
2000 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2001 {
2002     struct capture_callback *cb;
2003
2004     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2005         if (cb->opaque == cb_opaque) {
2006             cb->ops.destroy (cb_opaque);
2007             QLIST_REMOVE (cb, entries);
2008             qemu_free (cb);
2009
2010             if (!cap->cb_head.lh_first) {
2011                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2012
2013                 while (sw) {
2014                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2015 #ifdef DEBUG_CAPTURE
2016                     dolog ("freeing %s\n", sw->name);
2017 #endif
2018
2019                     sw1 = sw->entries.le_next;
2020                     if (sw->rate) {
2021                         st_rate_stop (sw->rate);
2022                         sw->rate = NULL;
2023                     }
2024                     QLIST_REMOVE (sw, entries);
2025                     QLIST_REMOVE (sc, entries);
2026                     qemu_free (sc);
2027                     sw = sw1;
2028                 }
2029                 QLIST_REMOVE (cap, entries);
2030                 qemu_free (cap);
2031             }
2032             return;
2033         }
2034     }
2035 }
2036
2037 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2038 {
2039     if (sw) {
2040         sw->vol.mute = mute;
2041         sw->vol.l = nominal_volume.l * lvol / 255;
2042         sw->vol.r = nominal_volume.r * rvol / 255;
2043     }
2044 }
2045
2046 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2047 {
2048     if (sw) {
2049         sw->vol.mute = mute;
2050         sw->vol.l = nominal_volume.l * lvol / 255;
2051         sw->vol.r = nominal_volume.r * rvol / 255;
2052     }
2053 }