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 av1474@comtv.ru\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 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
 855                            int live, int pending)
 856 {
 857     int left = hw->samples - pending;
 858     int len = audio_MIN (left, live);
 859     int clipped = 0;
 860
 861     while (len) {
 862         struct st_sample *src = hw->mix_buf + hw->rpos;
 863         uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
 864         int samples_till_end_of_buf = hw->samples - hw->rpos;
 865         int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
 866
 867         hw->clip (dst, src, samples_to_clip);
 868
 869         hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
 870         len -= samples_to_clip;
 871         clipped += samples_to_clip;
 872     }
 873     return clipped;
 874 }
 875
 876 /*
 877  * Soft voice (capture)
 878  */
 879 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
 880 {
 881     HWVoiceIn *hw = sw->hw;
 882     int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 883     int rpos;
 884
 885     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 886         dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 887         return 0;
 888     }
 889
 890     rpos = hw->wpos - live;
 891     if (rpos >= 0) {
 892         return rpos;
 893     }
 894     else {
 895         return hw->samples + rpos;
 896     }
 897 }
 898
 899 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
 900 {
 901     HWVoiceIn *hw = sw->hw;
 902     int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
 903     struct st_sample *src, *dst = sw->buf;
 904
 905     rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
 906
 907     live = hw->total_samples_captured - sw->total_hw_samples_acquired;
 908     if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 909         dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
 910         return 0;
 911     }
 912
 913     samples = size >> sw->info.shift;
 914     if (!live) {
 915         return 0;
 916     }
 917
 918     swlim = (live * sw->ratio) >> 32;
 919     swlim = audio_MIN (swlim, samples);
 920
 921     while (swlim) {
 922         src = hw->conv_buf + rpos;
 923         isamp = hw->wpos - rpos;
 924         /* XXX: <= ? */
 925         if (isamp <= 0) {
 926             isamp = hw->samples - rpos;
 927         }
 928
 929         if (!isamp) {
 930             break;
 931         }
 932         osamp = swlim;
 933
 934         if (audio_bug (AUDIO_FUNC, osamp < 0)) {
 935             dolog ("osamp=%d\n", osamp);
 936             return 0;
 937         }
 938
 939         st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
 940         swlim -= osamp;
 941         rpos = (rpos + isamp) % hw->samples;
 942         dst += osamp;
 943         ret += osamp;
 944         total += isamp;
 945     }
 946
 947     sw->clip (buf, sw->buf, ret);
 948     sw->total_hw_samples_acquired += total;
 949     return ret << sw->info.shift;
 950 }
 951
 952 /*
 953  * Hard voice (playback)
 954  */
 955 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
 956 {
 957     SWVoiceOut *sw;
 958     int m = INT_MAX;
 959     int nb_live = 0;
 960
 961     for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
 962         if (sw->active || !sw->empty) {
 963             m = audio_MIN (m, sw->total_hw_samples_mixed);
 964             nb_live += 1;
 965         }
 966     }
 967
 968     *nb_livep = nb_live;
 969     return m;
 970 }
 971
 972 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
 973 {
 974     int smin;
 975     int nb_live1;
 976
 977     smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
 978     if (nb_live) {
 979         *nb_live = nb_live1;
 980     }
 981
 982     if (nb_live1) {
 983         int live = smin;
 984
 985         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
 986             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
 987             return 0;
 988         }
 989         return live;
 990     }
 991     return 0;
 992 }
 993
 994 /*
 995  * Soft voice (playback)
 996  */
 997 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
 998 {
 999     int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1000     int ret = 0, pos = 0, total = 0;
1001
1002     if (!sw) {
1003         return size;
1004     }
1005
1006     hwsamples = sw->hw->samples;
1007
1008     live = sw->total_hw_samples_mixed;
1009     if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1010         dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1011         return 0;
1012     }
1013
1014     if (live == hwsamples) {
1015 #ifdef DEBUG_OUT
1016         dolog ("%s is full %d\n", sw->name, live);
1017 #endif
1018         return 0;
1019     }
1020
1021     wpos = (sw->hw->rpos + live) % hwsamples;
1022     samples = size >> sw->info.shift;
1023
1024     dead = hwsamples - live;
1025     swlim = ((int64_t) dead << 32) / sw->ratio;
1026     swlim = audio_MIN (swlim, samples);
1027     if (swlim) {
1028         sw->conv (sw->buf, buf, swlim, &sw->vol);
1029     }
1030
1031     while (swlim) {
1032         dead = hwsamples - live;
1033         left = hwsamples - wpos;
1034         blck = audio_MIN (dead, left);
1035         if (!blck) {
1036             break;
1037         }
1038         isamp = swlim;
1039         osamp = blck;
1040         st_rate_flow_mix (
1041             sw->rate,
1042             sw->buf + pos,
1043             sw->hw->mix_buf + wpos,
1044             &isamp,
1045             &osamp
1046             );
1047         ret += isamp;
1048         swlim -= isamp;
1049         pos += isamp;
1050         live += osamp;
1051         wpos = (wpos + osamp) % hwsamples;
1052         total += osamp;
1053     }
1054
1055     sw->total_hw_samples_mixed += total;
1056     sw->empty = sw->total_hw_samples_mixed == 0;
1057
1058 #ifdef DEBUG_OUT
1059     dolog (
1060         "%s: write size %d ret %d total sw %d\n",
1061         SW_NAME (sw),
1062         size >> sw->info.shift,
1063         ret,
1064         sw->total_hw_samples_mixed
1065         );
1066 #endif
1067
1068     return ret << sw->info.shift;
1069 }
1070
1071 #ifdef DEBUG_AUDIO
1072 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1073 {
1074     dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1075            cap, info->bits, info->sign, info->freq, info->nchannels);
1076 }
1077 #endif
1078
1079 #define DAC
1080 #include "audio_template.h"
1081 #undef DAC
1082 #include "audio_template.h"
1083
1084 /*
1085  * Timer
1086  */
1087 static void audio_timer (void *opaque)
1088 {
1089     AudioState *s = opaque;
1090
1091     audio_run ("timer");
1092     qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1093 }
1094
1095
1096 static int audio_is_timer_needed (void)
1097 {
1098     HWVoiceIn *hwi = NULL;
1099     HWVoiceOut *hwo = NULL;
1100
1101     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1102         if (!hwo->poll_mode) return 1;
1103     }
1104     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1105         if (!hwi->poll_mode) return 1;
1106     }
1107     return 0;
1108 }
1109
1110 static void audio_reset_timer (void)
1111 {
1112     AudioState *s = &glob_audio_state;
1113
1114     if (audio_is_timer_needed ()) {
1115         qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
1116     }
1117     else {
1118         qemu_del_timer (s->ts);
1119     }
1120 }
1121
1122 /*
1123  * Public API
1124  */
1125 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1126 {
1127     int bytes;
1128
1129     if (!sw) {
1130         /* XXX: Consider options */
1131         return size;
1132     }
1133
1134     if (!sw->hw->enabled) {
1135         dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1136         return 0;
1137     }
1138
1139     bytes = sw->hw->pcm_ops->write (sw, buf, size);
1140     return bytes;
1141 }
1142
1143 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1144 {
1145     int bytes;
1146
1147     if (!sw) {
1148         /* XXX: Consider options */
1149         return size;
1150     }
1151
1152     if (!sw->hw->enabled) {
1153         dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1154         return 0;
1155     }
1156
1157     bytes = sw->hw->pcm_ops->read (sw, buf, size);
1158     return bytes;
1159 }
1160
1161 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1162 {
1163     return sw->hw->samples << sw->hw->info.shift;
1164 }
1165
1166 void AUD_set_active_out (SWVoiceOut *sw, int on)
1167 {
1168     HWVoiceOut *hw;
1169
1170     if (!sw) {
1171         return;
1172     }
1173
1174     hw = sw->hw;
1175     if (sw->active != on) {
1176         AudioState *s = &glob_audio_state;
1177         SWVoiceOut *temp_sw;
1178         SWVoiceCap *sc;
1179
1180         if (on) {
1181             hw->pending_disable = 0;
1182             if (!hw->enabled) {
1183                 hw->enabled = 1;
1184                 if (s->vm_running) {
1185                     hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1186                     audio_reset_timer ();
1187                 }
1188             }
1189         }
1190         else {
1191             if (hw->enabled) {
1192                 int nb_active = 0;
1193
1194                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1195                      temp_sw = temp_sw->entries.le_next) {
1196                     nb_active += temp_sw->active != 0;
1197                 }
1198
1199                 hw->pending_disable = nb_active == 1;
1200             }
1201         }
1202
1203         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1204             sc->sw.active = hw->enabled;
1205             if (hw->enabled) {
1206                 audio_capture_maybe_changed (sc->cap, 1);
1207             }
1208         }
1209         sw->active = on;
1210     }
1211 }
1212
1213 void AUD_set_active_in (SWVoiceIn *sw, int on)
1214 {
1215     HWVoiceIn *hw;
1216
1217     if (!sw) {
1218         return;
1219     }
1220
1221     hw = sw->hw;
1222     if (sw->active != on) {
1223         AudioState *s = &glob_audio_state;
1224         SWVoiceIn *temp_sw;
1225
1226         if (on) {
1227             if (!hw->enabled) {
1228                 hw->enabled = 1;
1229                 if (s->vm_running) {
1230                     hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1231                 }
1232             }
1233             sw->total_hw_samples_acquired = hw->total_samples_captured;
1234         }
1235         else {
1236             if (hw->enabled) {
1237                 int nb_active = 0;
1238
1239                 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1240                      temp_sw = temp_sw->entries.le_next) {
1241                     nb_active += temp_sw->active != 0;
1242                 }
1243
1244                 if (nb_active == 1) {
1245                     hw->enabled = 0;
1246                     hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1247                 }
1248             }
1249         }
1250         sw->active = on;
1251     }
1252 }
1253
1254 static int audio_get_avail (SWVoiceIn *sw)
1255 {
1256     int live;
1257
1258     if (!sw) {
1259         return 0;
1260     }
1261
1262     live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1263     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1264         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1265         return 0;
1266     }
1267
1268     ldebug (
1269         "%s: get_avail live %d ret %" PRId64 "\n",
1270         SW_NAME (sw),
1271         live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1272         );
1273
1274     return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1275 }
1276
1277 static int audio_get_free (SWVoiceOut *sw)
1278 {
1279     int live, dead;
1280
1281     if (!sw) {
1282         return 0;
1283     }
1284
1285     live = sw->total_hw_samples_mixed;
1286
1287     if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1288         dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1289         return 0;
1290     }
1291
1292     dead = sw->hw->samples - live;
1293
1294 #ifdef DEBUG_OUT
1295     dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1296            SW_NAME (sw),
1297            live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1298 #endif
1299
1300     return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1301 }
1302
1303 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1304 {
1305     int n;
1306
1307     if (hw->enabled) {
1308         SWVoiceCap *sc;
1309
1310         for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1311             SWVoiceOut *sw = &sc->sw;
1312             int rpos2 = rpos;
1313
1314             n = samples;
1315             while (n) {
1316                 int till_end_of_hw = hw->samples - rpos2;
1317                 int to_write = audio_MIN (till_end_of_hw, n);
1318                 int bytes = to_write << hw->info.shift;
1319                 int written;
1320
1321                 sw->buf = hw->mix_buf + rpos2;
1322                 written = audio_pcm_sw_write (sw, NULL, bytes);
1323                 if (written - bytes) {
1324                     dolog ("Could not mix %d bytes into a capture "
1325                            "buffer, mixed %d\n",
1326                            bytes, written);
1327                     break;
1328                 }
1329                 n -= to_write;
1330                 rpos2 = (rpos2 + to_write) % hw->samples;
1331             }
1332         }
1333     }
1334
1335     n = audio_MIN (samples, hw->samples - rpos);
1336     mixeng_clear (hw->mix_buf + rpos, n);
1337     mixeng_clear (hw->mix_buf, samples - n);
1338 }
1339
1340 static void audio_run_out (AudioState *s)
1341 {
1342     HWVoiceOut *hw = NULL;
1343     SWVoiceOut *sw;
1344
1345     while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1346         int played;
1347         int live, free, nb_live, cleanup_required, prev_rpos;
1348
1349         live = audio_pcm_hw_get_live_out (hw, &nb_live);
1350         if (!nb_live) {
1351             live = 0;
1352         }
1353
1354         if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1355             dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1356             continue;
1357         }
1358
1359         if (hw->pending_disable && !nb_live) {
1360             SWVoiceCap *sc;
1361 #ifdef DEBUG_OUT
1362             dolog ("Disabling voice\n");
1363 #endif
1364             hw->enabled = 0;
1365             hw->pending_disable = 0;
1366             hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1367             for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1368                 sc->sw.active = 0;
1369                 audio_recalc_and_notify_capture (sc->cap);
1370             }
1371             continue;
1372         }
1373
1374         if (!live) {
1375             for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1376                 if (sw->active) {
1377                     free = audio_get_free (sw);
1378                     if (free > 0) {
1379                         sw->callback.fn (sw->callback.opaque, free);
1380                     }
1381                 }
1382             }
1383             continue;
1384         }
1385
1386         prev_rpos = hw->rpos;
1387         played = hw->pcm_ops->run_out (hw, live);
1388         if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1389             dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1390                    hw->rpos, hw->samples, played);
1391             hw->rpos = 0;
1392         }
1393
1394 #ifdef DEBUG_OUT
1395         dolog ("played=%d\n", played);
1396 #endif
1397
1398         if (played) {
1399             hw->ts_helper += played;
1400             audio_capture_mix_and_clear (hw, prev_rpos, played);
1401         }
1402
1403         cleanup_required = 0;
1404         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1405             if (!sw->active && sw->empty) {
1406                 continue;
1407             }
1408
1409             if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1410                 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1411                        played, sw->total_hw_samples_mixed);
1412                 played = sw->total_hw_samples_mixed;
1413             }
1414
1415             sw->total_hw_samples_mixed -= played;
1416
1417             if (!sw->total_hw_samples_mixed) {
1418                 sw->empty = 1;
1419                 cleanup_required |= !sw->active && !sw->callback.fn;
1420             }
1421
1422             if (sw->active) {
1423                 free = audio_get_free (sw);
1424                 if (free > 0) {
1425                     sw->callback.fn (sw->callback.opaque, free);
1426                 }
1427             }
1428         }
1429
1430         if (cleanup_required) {
1431             SWVoiceOut *sw1;
1432
1433             sw = hw->sw_head.lh_first;
1434             while (sw) {
1435                 sw1 = sw->entries.le_next;
1436                 if (!sw->active && !sw->callback.fn) {
1437 #ifdef DEBUG_PLIVE
1438                     dolog ("Finishing with old voice\n");
1439 #endif
1440                     audio_close_out (sw);
1441                 }
1442                 sw = sw1;
1443             }
1444         }
1445     }
1446 }
1447
1448 static void audio_run_in (AudioState *s)
1449 {
1450     HWVoiceIn *hw = NULL;
1451
1452     while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1453         SWVoiceIn *sw;
1454         int captured, min;
1455
1456         captured = hw->pcm_ops->run_in (hw);
1457
1458         min = audio_pcm_hw_find_min_in (hw);
1459         hw->total_samples_captured += captured - min;
1460         hw->ts_helper += captured;
1461
1462         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1463             sw->total_hw_samples_acquired -= min;
1464
1465             if (sw->active) {
1466                 int avail;
1467
1468                 avail = audio_get_avail (sw);
1469                 if (avail > 0) {
1470                     sw->callback.fn (sw->callback.opaque, avail);
1471                 }
1472             }
1473         }
1474     }
1475 }
1476
1477 static void audio_run_capture (AudioState *s)
1478 {
1479     CaptureVoiceOut *cap;
1480
1481     for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1482         int live, rpos, captured;
1483         HWVoiceOut *hw = &cap->hw;
1484         SWVoiceOut *sw;
1485
1486         captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1487         rpos = hw->rpos;
1488         while (live) {
1489             int left = hw->samples - rpos;
1490             int to_capture = audio_MIN (live, left);
1491             struct st_sample *src;
1492             struct capture_callback *cb;
1493
1494             src = hw->mix_buf + rpos;
1495             hw->clip (cap->buf, src, to_capture);
1496             mixeng_clear (src, to_capture);
1497
1498             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1499                 cb->ops.capture (cb->opaque, cap->buf,
1500                                  to_capture << hw->info.shift);
1501             }
1502             rpos = (rpos + to_capture) % hw->samples;
1503             live -= to_capture;
1504         }
1505         hw->rpos = rpos;
1506
1507         for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1508             if (!sw->active && sw->empty) {
1509                 continue;
1510             }
1511
1512             if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1513                 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1514                        captured, sw->total_hw_samples_mixed);
1515                 captured = sw->total_hw_samples_mixed;
1516             }
1517
1518             sw->total_hw_samples_mixed -= captured;
1519             sw->empty = sw->total_hw_samples_mixed == 0;
1520         }
1521     }
1522 }
1523
1524 void audio_run (const char *msg)
1525 {
1526     AudioState *s = &glob_audio_state;
1527
1528     audio_run_out (s);
1529     audio_run_in (s);
1530     audio_run_capture (s);
1531 #ifdef DEBUG_POLL
1532     {
1533         static double prevtime;
1534         double currtime;
1535         struct timeval tv;
1536
1537         if (gettimeofday (&tv, NULL)) {
1538             perror ("audio_run: gettimeofday");
1539             return;
1540         }
1541
1542         currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1543         dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1544         prevtime = currtime;
1545     }
1546 #endif
1547 }
1548
1549 static struct audio_option audio_options[] = {
1550     /* DAC */
1551     {
1552         .name  = "DAC_FIXED_SETTINGS",
1553         .tag   = AUD_OPT_BOOL,
1554         .valp  = &conf.fixed_out.enabled,
1555         .descr = "Use fixed settings for host DAC"
1556     },
1557     {
1558         .name  = "DAC_FIXED_FREQ",
1559         .tag   = AUD_OPT_INT,
1560         .valp  = &conf.fixed_out.settings.freq,
1561         .descr = "Frequency for fixed host DAC"
1562     },
1563     {
1564         .name  = "DAC_FIXED_FMT",
1565         .tag   = AUD_OPT_FMT,
1566         .valp  = &conf.fixed_out.settings.fmt,
1567         .descr = "Format for fixed host DAC"
1568     },
1569     {
1570         .name  = "DAC_FIXED_CHANNELS",
1571         .tag   = AUD_OPT_INT,
1572         .valp  = &conf.fixed_out.settings.nchannels,
1573         .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1574     },
1575     {
1576         .name  = "DAC_VOICES",
1577         .tag   = AUD_OPT_INT,
1578         .valp  = &conf.fixed_out.nb_voices,
1579         .descr = "Number of voices for DAC"
1580     },
1581     {
1582         .name  = "DAC_TRY_POLL",
1583         .tag   = AUD_OPT_BOOL,
1584         .valp  = &conf.try_poll_out,
1585         .descr = "Attempt using poll mode for DAC"
1586     },
1587     /* ADC */
1588     {
1589         .name  = "ADC_FIXED_SETTINGS",
1590         .tag   = AUD_OPT_BOOL,
1591         .valp  = &conf.fixed_in.enabled,
1592         .descr = "Use fixed settings for host ADC"
1593     },
1594     {
1595         .name  = "ADC_FIXED_FREQ",
1596         .tag   = AUD_OPT_INT,
1597         .valp  = &conf.fixed_in.settings.freq,
1598         .descr = "Frequency for fixed host ADC"
1599     },
1600     {
1601         .name  = "ADC_FIXED_FMT",
1602         .tag   = AUD_OPT_FMT,
1603         .valp  = &conf.fixed_in.settings.fmt,
1604         .descr = "Format for fixed host ADC"
1605     },
1606     {
1607         .name  = "ADC_FIXED_CHANNELS",
1608         .tag   = AUD_OPT_INT,
1609         .valp  = &conf.fixed_in.settings.nchannels,
1610         .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1611     },
1612     {
1613         .name  = "ADC_VOICES",
1614         .tag   = AUD_OPT_INT,
1615         .valp  = &conf.fixed_in.nb_voices,
1616         .descr = "Number of voices for ADC"
1617     },
1618     {
1619         .name  = "ADC_TRY_POLL",
1620         .tag   = AUD_OPT_BOOL,
1621         .valp  = &conf.try_poll_in,
1622         .descr = "Attempt using poll mode for ADC"
1623     },
1624     /* Misc */
1625     {
1626         .name  = "TIMER_PERIOD",
1627         .tag   = AUD_OPT_INT,
1628         .valp  = &conf.period.hertz,
1629         .descr = "Timer period in HZ (0 - use lowest possible)"
1630     },
1631     {
1632         .name  = "PLIVE",
1633         .tag   = AUD_OPT_BOOL,
1634         .valp  = &conf.plive,
1635         .descr = "(undocumented)"
1636     },
1637     {
1638         .name  = "LOG_TO_MONITOR",
1639         .tag   = AUD_OPT_BOOL,
1640         .valp  = &conf.log_to_monitor,
1641         .descr = "Print logging messages to monitor instead of stderr"
1642     },
1643     { /* End of list */ }
1644 };
1645
1646 static void audio_pp_nb_voices (const char *typ, int nb)
1647 {
1648     switch (nb) {
1649     case 0:
1650         printf ("Does not support %s\n", typ);
1651         break;
1652     case 1:
1653         printf ("One %s voice\n", typ);
1654         break;
1655     case INT_MAX:
1656         printf ("Theoretically supports many %s voices\n", typ);
1657         break;
1658     default:
1659         printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1660         break;
1661     }
1662
1663 }
1664
1665 void AUD_help (void)
1666 {
1667     size_t i;
1668
1669     audio_process_options ("AUDIO", audio_options);
1670     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1671         struct audio_driver *d = drvtab[i];
1672         if (d->options) {
1673             audio_process_options (d->name, d->options);
1674         }
1675     }
1676
1677     printf ("Audio options:\n");
1678     audio_print_options ("AUDIO", audio_options);
1679     printf ("\n");
1680
1681     printf ("Available drivers:\n");
1682
1683     for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1684         struct audio_driver *d = drvtab[i];
1685
1686         printf ("Name: %s\n", d->name);
1687         printf ("Description: %s\n", d->descr);
1688
1689         audio_pp_nb_voices ("playback", d->max_voices_out);
1690         audio_pp_nb_voices ("capture", d->max_voices_in);
1691
1692         if (d->options) {
1693             printf ("Options:\n");
1694             audio_print_options (d->name, d->options);
1695         }
1696         else {
1697             printf ("No options\n");
1698         }
1699         printf ("\n");
1700     }
1701
1702     printf (
1703         "Options are settable through environment variables.\n"
1704         "Example:\n"
1705 #ifdef _WIN32
1706         "  set QEMU_AUDIO_DRV=wav\n"
1707         "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1708 #else
1709         "  export QEMU_AUDIO_DRV=wav\n"
1710         "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1711         "(for csh replace export with setenv in the above)\n"
1712 #endif
1713         "  qemu ...\n\n"
1714         );
1715 }
1716
1717 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1718 {
1719     if (drv->options) {
1720         audio_process_options (drv->name, drv->options);
1721     }
1722     s->drv_opaque = drv->init ();
1723
1724     if (s->drv_opaque) {
1725         audio_init_nb_voices_out (drv);
1726         audio_init_nb_voices_in (drv);
1727         s->drv = drv;
1728         return 0;
1729     }
1730     else {
1731         dolog ("Could not init `%s' audio driver\n", drv->name);
1732         return -1;
1733     }
1734 }
1735
1736 static void audio_vm_change_state_handler (void *opaque, int running,
1737                                            int reason)
1738 {
1739     AudioState *s = opaque;
1740     HWVoiceOut *hwo = NULL;
1741     HWVoiceIn *hwi = NULL;
1742     int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1743
1744     s->vm_running = running;
1745     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1746         hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1747     }
1748
1749     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1750         hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1751     }
1752     audio_reset_timer ();
1753 }
1754
1755 static void audio_atexit (void)
1756 {
1757     AudioState *s = &glob_audio_state;
1758     HWVoiceOut *hwo = NULL;
1759     HWVoiceIn *hwi = NULL;
1760
1761     while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1762         SWVoiceCap *sc;
1763
1764         hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1765         hwo->pcm_ops->fini_out (hwo);
1766
1767         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1768             CaptureVoiceOut *cap = sc->cap;
1769             struct capture_callback *cb;
1770
1771             for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1772                 cb->ops.destroy (cb->opaque);
1773             }
1774         }
1775     }
1776
1777     while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1778         hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1779         hwi->pcm_ops->fini_in (hwi);
1780     }
1781
1782     if (s->drv) {
1783         s->drv->fini (s->drv_opaque);
1784     }
1785 }
1786
1787 static void audio_save (QEMUFile *f, void *opaque)
1788 {
1789     (void) f;
1790     (void) opaque;
1791 }
1792
1793 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1794 {
1795     (void) f;
1796     (void) opaque;
1797
1798     if (version_id != 1) {
1799         return -EINVAL;
1800     }
1801
1802     return 0;
1803 }
1804
1805 static void audio_init (void)
1806 {
1807     size_t i;
1808     int done = 0;
1809     const char *drvname;
1810     VMChangeStateEntry *e;
1811     AudioState *s = &glob_audio_state;
1812
1813     if (s->drv) {
1814         return;
1815     }
1816
1817     QLIST_INIT (&s->hw_head_out);
1818     QLIST_INIT (&s->hw_head_in);
1819     QLIST_INIT (&s->cap_head);
1820     atexit (audio_atexit);
1821
1822     s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1823     if (!s->ts) {
1824         hw_error("Could not create audio timer\n");
1825     }
1826
1827     audio_process_options ("AUDIO", audio_options);
1828
1829     s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1830     s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1831
1832     if (s->nb_hw_voices_out <= 0) {
1833         dolog ("Bogus number of playback voices %d, setting to 1\n",
1834                s->nb_hw_voices_out);
1835         s->nb_hw_voices_out = 1;
1836     }
1837
1838     if (s->nb_hw_voices_in <= 0) {
1839         dolog ("Bogus number of capture voices %d, setting to 0\n",
1840                s->nb_hw_voices_in);
1841         s->nb_hw_voices_in = 0;
1842     }
1843
1844     {
1845         int def;
1846         drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1847     }
1848
1849     if (drvname) {
1850         int found = 0;
1851
1852         for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1853             if (!strcmp (drvname, drvtab[i]->name)) {
1854                 done = !audio_driver_init (s, drvtab[i]);
1855                 found = 1;
1856                 break;
1857             }
1858         }
1859
1860         if (!found) {
1861             dolog ("Unknown audio driver `%s'\n", drvname);
1862             dolog ("Run with -audio-help to list available drivers\n");
1863         }
1864     }
1865
1866     if (!done) {
1867         for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1868             if (drvtab[i]->can_be_default) {
1869                 done = !audio_driver_init (s, drvtab[i]);
1870             }
1871         }
1872     }
1873
1874     if (!done) {
1875         done = !audio_driver_init (s, &no_audio_driver);
1876         if (!done) {
1877             hw_error("Could not initialize audio subsystem\n");
1878         }
1879         else {
1880             dolog ("warning: Using timer based audio emulation\n");
1881         }
1882     }
1883
1884     if (conf.period.hertz <= 0) {
1885         if (conf.period.hertz < 0) {
1886             dolog ("warning: Timer period is negative - %d "
1887                    "treating as zero\n",
1888                    conf.period.hertz);
1889         }
1890         conf.period.ticks = 1;
1891     } else {
1892         conf.period.ticks =
1893             muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1894     }
1895
1896     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1897     if (!e) {
1898         dolog ("warning: Could not register change state handler\n"
1899                "(Audio can continue looping even after stopping the VM)\n");
1900     }
1901
1902     QLIST_INIT (&s->card_head);
1903     register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1904 }
1905
1906 void AUD_register_card (const char *name, QEMUSoundCard *card)
1907 {
1908     audio_init ();
1909     card->name = qemu_strdup (name);
1910     memset (&card->entries, 0, sizeof (card->entries));
1911     QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1912 }
1913
1914 void AUD_remove_card (QEMUSoundCard *card)
1915 {
1916     QLIST_REMOVE (card, entries);
1917     qemu_free (card->name);
1918 }
1919
1920
1921 CaptureVoiceOut *AUD_add_capture (
1922     struct audsettings *as,
1923     struct audio_capture_ops *ops,
1924     void *cb_opaque
1925     )
1926 {
1927     AudioState *s = &glob_audio_state;
1928     CaptureVoiceOut *cap;
1929     struct capture_callback *cb;
1930
1931     if (audio_validate_settings (as)) {
1932         dolog ("Invalid settings were passed when trying to add capture\n");
1933         audio_print_settings (as);
1934         goto err0;
1935     }
1936
1937     cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1938     if (!cb) {
1939         dolog ("Could not allocate capture callback information, size %zu\n",
1940                sizeof (*cb));
1941         goto err0;
1942     }
1943     cb->ops = *ops;
1944     cb->opaque = cb_opaque;
1945
1946     cap = audio_pcm_capture_find_specific (as);
1947     if (cap) {
1948         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1949         return cap;
1950     }
1951     else {
1952         HWVoiceOut *hw;
1953         CaptureVoiceOut *cap;
1954
1955         cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1956         if (!cap) {
1957             dolog ("Could not allocate capture voice, size %zu\n",
1958                    sizeof (*cap));
1959             goto err1;
1960         }
1961
1962         hw = &cap->hw;
1963         QLIST_INIT (&hw->sw_head);
1964         QLIST_INIT (&cap->cb_head);
1965
1966         /* XXX find a more elegant way */
1967         hw->samples = 4096 * 4;
1968         hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1969                                     sizeof (struct st_sample));
1970         if (!hw->mix_buf) {
1971             dolog ("Could not allocate capture mix buffer (%d samples)\n",
1972                    hw->samples);
1973             goto err2;
1974         }
1975
1976         audio_pcm_init_info (&hw->info, as);
1977
1978         cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1979         if (!cap->buf) {
1980             dolog ("Could not allocate capture buffer "
1981                    "(%d samples, each %d bytes)\n",
1982                    hw->samples, 1 << hw->info.shift);
1983             goto err3;
1984         }
1985
1986         hw->clip = mixeng_clip
1987             [hw->info.nchannels == 2]
1988             [hw->info.sign]
1989             [hw->info.swap_endianness]
1990             [audio_bits_to_index (hw->info.bits)];
1991
1992         QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1993         QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1994
1995         hw = NULL;
1996         while ((hw = audio_pcm_hw_find_any_out (hw))) {
1997             audio_attach_capture (hw);
1998         }
1999         return cap;
2000
2001     err3:
2002         qemu_free (cap->hw.mix_buf);
2003     err2:
2004         qemu_free (cap);
2005     err1:
2006         qemu_free (cb);
2007     err0:
2008         return NULL;
2009     }
2010 }
2011
2012 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2013 {
2014     struct capture_callback *cb;
2015
2016     for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2017         if (cb->opaque == cb_opaque) {
2018             cb->ops.destroy (cb_opaque);
2019             QLIST_REMOVE (cb, entries);
2020             qemu_free (cb);
2021
2022             if (!cap->cb_head.lh_first) {
2023                 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2024
2025                 while (sw) {
2026                     SWVoiceCap *sc = (SWVoiceCap *) sw;
2027 #ifdef DEBUG_CAPTURE
2028                     dolog ("freeing %s\n", sw->name);
2029 #endif
2030
2031                     sw1 = sw->entries.le_next;
2032                     if (sw->rate) {
2033                         st_rate_stop (sw->rate);
2034                         sw->rate = NULL;
2035                     }
2036                     QLIST_REMOVE (sw, entries);
2037                     QLIST_REMOVE (sc, entries);
2038                     qemu_free (sc);
2039                     sw = sw1;
2040                 }
2041                 QLIST_REMOVE (cap, entries);
2042                 qemu_free (cap);
2043             }
2044             return;
2045         }
2046     }
2047 }
2048
2049 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2050 {
2051     if (sw) {
2052         sw->vol.mute = mute;
2053         sw->vol.l = nominal_volume.l * lvol / 255;
2054         sw->vol.r = nominal_volume.r * rvol / 255;
2055     }
2056 }
2057
2058 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2059 {
2060     if (sw) {
2061         sw->vol.mute = mute;
2062         sw->vol.l = nominal_volume.l * lvol / 255;
2063         sw->vol.r = nominal_volume.r * rvol / 255;
2064     }
2065 }