snd_dma.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // snd_dma.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #ifdef _WIN32
  25 #include "winquake.h"
  26 #endif
  27
  28 void S_Play(void);
  29 void S_PlayVol(void);
  30 void S_SoundList(void);
  31 void S_Update_();
  32 void S_StopAllSounds(qboolean clear);
  33 void S_StopAllSoundsC(void);
  34
  35 // =======================================================================
  36 // Internal sound data & structures
  37 // =======================================================================
  38
  39 channel_t   channels[MAX_CHANNELS];
  40 int                     total_channels;
  41
  42 int                             snd_blocked = 0;
  43 static qboolean snd_ambient = 1;
  44 qboolean                snd_initialized = false;
  45
  46 // pointer should go away
  47 volatile dma_t  *shm = 0;
  48 volatile dma_t sn;
  49
  50 vec3_t          listener_origin;
  51 vec3_t          listener_forward;
  52 vec3_t          listener_right;
  53 vec3_t          listener_up;
  54 vec_t           sound_nominal_clip_dist=1000.0;
  55
  56 int                     soundtime;              // sample PAIRS
  57 int             paintedtime;    // sample PAIRS
  58
  59
  60 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  61 #define MAX_SFX         4096
  62 sfx_t           *known_sfx;             // hunk allocated [MAX_SFX]
  63 int                     num_sfx;
  64
  65 sfx_t           *ambient_sfx[NUM_AMBIENTS];
  66
  67 int sound_started = 0;
  68
  69 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  70 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  71
  72 cvar_t nosound = {0, "nosound", "0"};
  73 cvar_t precache = {0, "precache", "1"};
  74 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  75 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  76 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  77 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  78 cvar_t snd_show = {0, "snd_show", "0"};
  79 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  80 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  81
  82
  83 // ====================================================================
  84 // User-setable variables
  85 // ====================================================================
  86
  87
  88 //
  89 // Fake dma is a synchronous faking of the DMA progress used for
  90 // isolating performance in the renderer.  The fakedma_updates is
  91 // number of times S_Update() is called per second.
  92 //
  93
  94 qboolean fakedma = false;
  95 int fakedma_updates = 15;
  96
  97
  98 void S_AmbientOff (void)
  99 {
 100         snd_ambient = false;
 101 }
 102
 103
 104 void S_AmbientOn (void)
 105 {
 106         snd_ambient = true;
 107 }
 108
 109
 110 void S_SoundInfo_f(void)
 111 {
 112         if (!sound_started || !shm)
 113         {
 114                 Con_Printf ("sound system not started\n");
 115                 return;
 116         }
 117
 118     Con_Printf("%5d stereo\n", shm->channels - 1);
 119     Con_Printf("%5d samples\n", shm->samples);
 120     Con_Printf("%5d samplepos\n", shm->samplepos);
 121     Con_Printf("%5d samplebits\n", shm->samplebits);
 122     Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
 123     Con_Printf("%5d speed\n", shm->speed);
 124     Con_Printf("0x%x dma buffer\n", shm->buffer);
 125         Con_Printf("%5d total_channels\n", total_channels);
 126 }
 127
 128
 129 /*
 130 ================
 131 S_Startup
 132 ================
 133 */
 134
 135 void S_Startup (void)
 136 {
 137         int             rc;
 138
 139         if (!snd_initialized)
 140                 return;
 141
 142         if (!fakedma)
 143         {
 144                 rc = SNDDMA_Init();
 145
 146                 if (!rc)
 147                 {
 148                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
 149                         sound_started = 0;
 150                         return;
 151                 }
 152         }
 153
 154         sound_started = 1;
 155 }
 156
 157
 158 void S_Play2(void);
 159
 160 mempool_t *snd_mempool;
 161
 162 /*
 163 ================
 164 S_Init
 165 ================
 166 */
 167 void S_Init (void)
 168 {
 169         Con_Printf("\nSound Initialization\n");
 170
 171         Cvar_RegisterVariable(&volume);
 172         Cvar_RegisterVariable(&bgmvolume);
 173
 174         if (COM_CheckParm("-nosound"))
 175                 return;
 176
 177         snd_mempool = Mem_AllocPool("sound");
 178
 179         if (COM_CheckParm("-simsound"))
 180                 fakedma = true;
 181
 182         Cmd_AddCommand("play", S_Play);
 183         Cmd_AddCommand("play2", S_Play2);
 184         Cmd_AddCommand("playvol", S_PlayVol);
 185         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 186         Cmd_AddCommand("soundlist", S_SoundList);
 187         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 188
 189         Cvar_RegisterVariable(&nosound);
 190         Cvar_RegisterVariable(&precache);
 191         Cvar_RegisterVariable(&bgmbuffer);
 192         Cvar_RegisterVariable(&ambient_level);
 193         Cvar_RegisterVariable(&ambient_fade);
 194         Cvar_RegisterVariable(&snd_noextraupdate);
 195         Cvar_RegisterVariable(&snd_show);
 196         Cvar_RegisterVariable(&_snd_mixahead);
 197         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 198
 199         snd_initialized = true;
 200
 201         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 202         num_sfx = 0;
 203
 204         S_Startup ();
 205
 206         SND_InitScaletable ();
 207
 208 // create a piece of DMA memory
 209
 210         if (fakedma)
 211         {
 212                 shm = (void *) Mem_Alloc(snd_mempool, sizeof(*shm));
 213                 shm->splitbuffer = 0;
 214                 shm->samplebits = 16;
 215                 shm->speed = 22050;
 216                 shm->channels = 2;
 217                 shm->samples = 32768;
 218                 shm->samplepos = 0;
 219                 shm->soundalive = true;
 220                 shm->gamealive = true;
 221                 shm->submission_chunk = 1;
 222                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
 223         }
 224
 225         if (!sound_started)
 226                 return;
 227
 228         Con_Printf ("Sound sampling rate: %i\n", shm->speed);
 229
 230         // provides a tick sound until washed clean
 231
 232         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 233         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 234
 235         S_StopAllSounds (true);
 236 }
 237
 238
 239 // =======================================================================
 240 // Shutdown sound engine
 241 // =======================================================================
 242
 243 void S_Shutdown(void)
 244 {
 245         if (!sound_started)
 246                 return;
 247
 248         if (shm)
 249                 shm->gamealive = 0;
 250
 251         shm = 0;
 252         sound_started = 0;
 253
 254         if (!fakedma)
 255                 SNDDMA_Shutdown();
 256 }
 257
 258
 259 // =======================================================================
 260 // Load a sound
 261 // =======================================================================
 262
 263 /*
 264 ==================
 265 S_FindName
 266
 267 ==================
 268 */
 269 sfx_t *S_FindName (char *name)
 270 {
 271         int i;
 272         sfx_t *sfx;
 273
 274         if (!name)
 275                 Host_Error ("S_FindName: NULL\n");
 276
 277         if (strlen(name) >= MAX_QPATH)
 278                 Host_Error ("Sound name too long: %s", name);
 279
 280 // see if already loaded
 281         for (i = 0;i < num_sfx;i++)
 282                 if (!strcmp(known_sfx[i].name, name))
 283                         return &known_sfx[i];
 284
 285         if (num_sfx == MAX_SFX)
 286                 Sys_Error ("S_FindName: out of sfx_t");
 287
 288         sfx = &known_sfx[i];
 289         strcpy (sfx->name, name);
 290
 291         num_sfx++;
 292
 293         return sfx;
 294 }
 295
 296
 297 /*
 298 ==================
 299 S_TouchSound
 300
 301 ==================
 302 */
 303 void S_TouchSound (char *name)
 304 {
 305         sfx_t   *sfx;
 306
 307         if (!sound_started)
 308                 return;
 309
 310         sfx = S_FindName (name);
 311 }
 312
 313 /*
 314 ==================
 315 S_PrecacheSound
 316
 317 ==================
 318 */
 319 sfx_t *S_PrecacheSound (char *name, int complain)
 320 {
 321         sfx_t *sfx;
 322
 323         if (!sound_started || nosound.integer)
 324                 return NULL;
 325
 326         sfx = S_FindName (name);
 327
 328 // cache it in
 329         if (precache.integer)
 330                 S_LoadSound (sfx, complain);
 331
 332         return sfx;
 333 }
 334
 335
 336 //=============================================================================
 337
 338 /*
 339 =================
 340 SND_PickChannel
 341 =================
 342 */
 343 channel_t *SND_PickChannel(int entnum, int entchannel)
 344 {
 345     int ch_idx;
 346     int first_to_die;
 347     int life_left;
 348
 349 // Check for replacement sound, or find the best one to replace
 350     first_to_die = -1;
 351     life_left = 0x7fffffff;
 352     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 353     {
 354                 if (entchannel != 0             // channel 0 never overrides
 355                 && channels[ch_idx].entnum == entnum
 356                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 357                 {       // always override sound from same entity
 358                         first_to_die = ch_idx;
 359                         break;
 360                 }
 361
 362                 // don't let monster sounds override player sounds
 363                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 364                         continue;
 365
 366                 if (channels[ch_idx].end - paintedtime < life_left)
 367                 {
 368                         life_left = channels[ch_idx].end - paintedtime;
 369                         first_to_die = ch_idx;
 370                 }
 371    }
 372
 373         if (first_to_die == -1)
 374                 return NULL;
 375
 376         if (channels[first_to_die].sfx)
 377                 channels[first_to_die].sfx = NULL;
 378
 379     return &channels[first_to_die];
 380 }
 381
 382 /*
 383 =================
 384 SND_Spatialize
 385 =================
 386 */
 387 void SND_Spatialize(channel_t *ch)
 388 {
 389     vec_t dot;
 390     vec_t dist;
 391     vec_t lscale, rscale, scale;
 392     vec3_t source_vec;
 393         sfx_t *snd;
 394
 395 // anything coming from the view entity will always be full volume
 396 // LordHavoc: make sounds with ATTN_NONE have no spatialization
 397         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 398         {
 399                 ch->leftvol = ch->master_vol;
 400                 ch->rightvol = ch->master_vol;
 401                 return;
 402         }
 403
 404 // calculate stereo seperation and distance attenuation
 405
 406         snd = ch->sfx;
 407         VectorSubtract(ch->origin, listener_origin, source_vec);
 408
 409         dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 410
 411         dot = DotProduct(listener_right, source_vec);
 412
 413         if (shm->channels == 1)
 414         {
 415                 rscale = 1.0;
 416                 lscale = 1.0;
 417         }
 418         else
 419         {
 420                 rscale = 1.0 + dot;
 421                 lscale = 1.0 - dot;
 422         }
 423
 424 // add in distance effect
 425         scale = (1.0 - dist) * rscale;
 426         ch->rightvol = (int) (ch->master_vol * scale);
 427         if (ch->rightvol < 0)
 428                 ch->rightvol = 0;
 429
 430         scale = (1.0 - dist) * lscale;
 431         ch->leftvol = (int) (ch->master_vol * scale);
 432         if (ch->leftvol < 0)
 433                 ch->leftvol = 0;
 434 }
 435
 436
 437 // =======================================================================
 438 // Start a sound effect
 439 // =======================================================================
 440
 441 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 442 {
 443         channel_t *target_chan, *check;
 444         sfxcache_t      *sc;
 445         int             vol;
 446         int             ch_idx;
 447         int             skip;
 448
 449         if (!sound_started)
 450                 return;
 451
 452         if (!sfx)
 453                 return;
 454
 455         if (nosound.integer)
 456                 return;
 457
 458         vol = fvol*255;
 459
 460 // pick a channel to play on
 461         target_chan = SND_PickChannel(entnum, entchannel);
 462         if (!target_chan)
 463                 return;
 464
 465 // spatialize
 466         memset (target_chan, 0, sizeof(*target_chan));
 467         VectorCopy(origin, target_chan->origin);
 468         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 469         target_chan->master_vol = vol;
 470         target_chan->entnum = entnum;
 471         target_chan->entchannel = entchannel;
 472         SND_Spatialize(target_chan);
 473
 474         if (!target_chan->leftvol && !target_chan->rightvol)
 475                 return;         // not audible at all
 476
 477 // new channel
 478         sc = S_LoadSound (sfx, true);
 479         if (!sc)
 480         {
 481                 target_chan->sfx = NULL;
 482                 return;         // couldn't load the sound's data
 483         }
 484
 485         target_chan->sfx = sfx;
 486         target_chan->pos = 0.0;
 487     target_chan->end = paintedtime + sc->length;
 488
 489 // if an identical sound has also been started this frame, offset the pos
 490 // a bit to keep it from just making the first one louder
 491         check = &channels[NUM_AMBIENTS];
 492     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 493     {
 494                 if (check == target_chan)
 495                         continue;
 496                 if (check->sfx == sfx && !check->pos)
 497                 {
 498                         // LordHavoc: fixed skip calculations
 499                         skip = 0.1 * shm->speed;
 500                         if (skip > sc->length)
 501                                 skip = sc->length;
 502                         if (skip > 0)
 503                                 skip = rand() % skip;
 504                         target_chan->pos += skip;
 505                         target_chan->end -= skip;
 506                         break;
 507                 }
 508
 509         }
 510 }
 511
 512 void S_StopSound(int entnum, int entchannel)
 513 {
 514         int i;
 515
 516         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 517         {
 518                 if (channels[i].entnum == entnum
 519                         && channels[i].entchannel == entchannel)
 520                 {
 521                         channels[i].end = 0;
 522                         channels[i].sfx = NULL;
 523                         return;
 524                 }
 525         }
 526 }
 527
 528 void S_StopAllSounds(qboolean clear)
 529 {
 530         int             i;
 531
 532         if (!sound_started)
 533                 return;
 534
 535         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 536
 537         for (i=0 ; i<MAX_CHANNELS ; i++)
 538                 if (channels[i].sfx)
 539                         channels[i].sfx = NULL;
 540
 541         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 542
 543         if (clear)
 544                 S_ClearBuffer ();
 545 }
 546
 547 void S_StopAllSoundsC (void)
 548 {
 549         S_StopAllSounds (true);
 550 }
 551
 552 void S_ClearBuffer (void)
 553 {
 554         int             clear;
 555
 556 #ifdef _WIN32
 557         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 558 #else
 559         if (!sound_started || !shm || !shm->buffer)
 560 #endif
 561                 return;
 562
 563         if (shm->samplebits == 8)
 564                 clear = 0x80;
 565         else
 566                 clear = 0;
 567
 568 #ifdef _WIN32
 569         if (pDSBuf)
 570         {
 571                 DWORD   dwSize;
 572                 DWORD   *pData;
 573                 int             reps;
 574                 HRESULT hresult;
 575
 576                 reps = 0;
 577
 578                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 579                 {
 580                         if (hresult != DSERR_BUFFERLOST)
 581                         {
 582                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 583                                 S_Shutdown ();
 584                                 return;
 585                         }
 586
 587                         if (++reps > 10000)
 588                         {
 589                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 590                                 S_Shutdown ();
 591                                 return;
 592                         }
 593                 }
 594
 595                 memset(pData, clear, shm->samples * shm->samplebits/8);
 596
 597                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 598
 599         }
 600         else
 601 #endif
 602         {
 603                 int             setsize = shm->samples * shm->samplebits / 8;
 604                 char    *buf = shm->buffer;
 605
 606                 while (setsize--)
 607                         *buf++ = 0;
 608
 609 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 610 // reads the memory area before writing to it causing a seg fault
 611 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 612 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 613         }
 614 }
 615
 616
 617 /*
 618 =================
 619 S_StaticSound
 620 =================
 621 */
 622 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 623 {
 624         channel_t       *ss;
 625         sfxcache_t              *sc;
 626
 627         if (!sfx)
 628                 return;
 629
 630         if (total_channels == MAX_CHANNELS)
 631         {
 632                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 633                 return;
 634         }
 635
 636         ss = &channels[total_channels];
 637         total_channels++;
 638
 639         sc = S_LoadSound (sfx, true);
 640         if (!sc)
 641                 return;
 642
 643         if (sc->loopstart == -1)
 644         {
 645                 Con_Printf ("Sound %s not looped\n", sfx->name);
 646                 return;
 647         }
 648
 649         ss->sfx = sfx;
 650         VectorCopy (origin, ss->origin);
 651         ss->master_vol = vol;
 652         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 653     ss->end = paintedtime + sc->length;
 654
 655         SND_Spatialize (ss);
 656 }
 657
 658
 659 //=============================================================================
 660
 661 /*
 662 ===================
 663 S_UpdateAmbientSounds
 664 ===================
 665 */
 666 void S_UpdateAmbientSounds (void)
 667 {
 668         mleaf_t         *l;
 669         float           vol;
 670         int                     ambient_channel;
 671         channel_t       *chan;
 672
 673         // LordHavoc: kill ambient sounds until proven otherwise
 674         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 675                 channels[ambient_channel].sfx = NULL;
 676
 677         if (!snd_ambient || !cl.worldmodel || ambient_level.value <= 0)
 678                 return;
 679
 680         l = Mod_PointInLeaf (listener_origin, cl.worldmodel);
 681         if (!l)
 682                 return;
 683
 684 // calc ambient sound levels
 685         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 686         {
 687                 chan = &channels[ambient_channel];
 688                 chan->sfx = ambient_sfx[ambient_channel];
 689
 690                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 691                 if (vol < 8)
 692                         vol = 0;
 693
 694         // don't adjust volume too fast
 695                 if (chan->master_vol < vol)
 696                 {
 697                         chan->master_vol += host_realframetime * ambient_fade.value;
 698                         if (chan->master_vol > vol)
 699                                 chan->master_vol = vol;
 700                 }
 701                 else if (chan->master_vol > vol)
 702                 {
 703                         chan->master_vol -= host_realframetime * ambient_fade.value;
 704                         if (chan->master_vol < vol)
 705                                 chan->master_vol = vol;
 706                 }
 707
 708                 chan->leftvol = chan->rightvol = chan->master_vol;
 709         }
 710 }
 711
 712
 713 /*
 714 ============
 715 S_Update
 716
 717 Called once each time through the main loop
 718 ============
 719 */
 720 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 721 {
 722         int                     i, j;
 723         int                     total;
 724         channel_t       *ch;
 725         channel_t       *combine;
 726
 727         if (!sound_started || (snd_blocked > 0))
 728                 return;
 729
 730         VectorCopy(origin, listener_origin);
 731         VectorCopy(forward, listener_forward);
 732         VectorCopy(right, listener_right);
 733         VectorCopy(up, listener_up);
 734
 735 // update general area ambient sound sources
 736         S_UpdateAmbientSounds ();
 737
 738         combine = NULL;
 739
 740 // update spatialization for static and dynamic sounds
 741         ch = channels+NUM_AMBIENTS;
 742         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 743         {
 744                 if (!ch->sfx)
 745                         continue;
 746                 SND_Spatialize(ch);         // respatialize channel
 747                 if (!ch->leftvol && !ch->rightvol)
 748                         continue;
 749
 750         // try to combine static sounds with a previous channel of the same
 751         // sound effect so we don't mix five torches every frame
 752
 753                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 754                 {
 755                 // see if it can just use the last one
 756                         if (combine && combine->sfx == ch->sfx)
 757                         {
 758                                 combine->leftvol += ch->leftvol;
 759                                 combine->rightvol += ch->rightvol;
 760                                 ch->leftvol = ch->rightvol = 0;
 761                                 continue;
 762                         }
 763                 // search for one
 764                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 765                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 766                                 if (combine->sfx == ch->sfx)
 767                                         break;
 768
 769                         if (j == total_channels)
 770                         {
 771                                 combine = NULL;
 772                         }
 773                         else
 774                         {
 775                                 if (combine != ch)
 776                                 {
 777                                         combine->leftvol += ch->leftvol;
 778                                         combine->rightvol += ch->rightvol;
 779                                         ch->leftvol = ch->rightvol = 0;
 780                                 }
 781                                 continue;
 782                         }
 783                 }
 784         }
 785
 786 //
 787 // debugging output
 788 //
 789         if (snd_show.integer)
 790         {
 791                 total = 0;
 792                 ch = channels;
 793                 for (i=0 ; i<total_channels; i++, ch++)
 794                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 795                                 total++;
 796
 797                 Con_Printf ("----(%i)----\n", total);
 798         }
 799
 800 // mix some sound
 801         S_Update_();
 802 }
 803
 804 void GetSoundtime(void)
 805 {
 806         int             samplepos;
 807         static  int             buffers;
 808         static  int             oldsamplepos;
 809         int             fullsamples;
 810
 811         fullsamples = shm->samples / shm->channels;
 812
 813 // it is possible to miscount buffers if it has wrapped twice between
 814 // calls to S_Update.  Oh well.
 815 #ifdef __sun__
 816         soundtime = SNDDMA_GetSamples();
 817 #else
 818         samplepos = SNDDMA_GetDMAPos();
 819
 820
 821         if (samplepos < oldsamplepos)
 822         {
 823                 buffers++;                                      // buffer wrapped
 824
 825                 if (paintedtime > 0x40000000)
 826                 {       // time to chop things off to avoid 32 bit limits
 827                         buffers = 0;
 828                         paintedtime = fullsamples;
 829                         S_StopAllSounds (true);
 830                 }
 831         }
 832         oldsamplepos = samplepos;
 833
 834         soundtime = buffers*fullsamples + samplepos/shm->channels;
 835 #endif
 836 }
 837
 838 void IN_Accumulate (void);
 839
 840 void S_ExtraUpdate (void)
 841 {
 842
 843 #ifdef _WIN32
 844         IN_Accumulate ();
 845 #endif
 846
 847         if (snd_noextraupdate.integer)
 848                 return;         // don't pollute timings
 849         S_Update_();
 850 }
 851
 852 void S_Update_(void)
 853 {
 854         unsigned        endtime;
 855         int                             samps;
 856
 857         if (!sound_started || (snd_blocked > 0))
 858                 return;
 859
 860 // Updates DMA time
 861         GetSoundtime();
 862
 863 // check to make sure that we haven't overshot
 864         if (paintedtime < soundtime)
 865                 paintedtime = soundtime;
 866
 867 // mix ahead of current position
 868         endtime = soundtime + _snd_mixahead.value * shm->speed;
 869         samps = shm->samples >> (shm->channels-1);
 870         if (endtime - soundtime > samps)
 871                 endtime = soundtime + samps;
 872
 873 #ifdef _WIN32
 874 // if the buffer was lost or stopped, restore it and/or restart it
 875         {
 876                 DWORD   dwStatus;
 877
 878                 if (pDSBuf)
 879                 {
 880                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 881                                 Con_Printf ("Couldn't get sound buffer status\n");
 882
 883                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 884                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 885
 886                         if (!(dwStatus & DSBSTATUS_PLAYING))
 887                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 888                 }
 889         }
 890 #endif
 891
 892         S_PaintChannels (endtime);
 893
 894         SNDDMA_Submit ();
 895 }
 896
 897 /*
 898 ===============================================================================
 899
 900 console functions
 901
 902 ===============================================================================
 903 */
 904
 905 void S_Play(void)
 906 {
 907         static int hash=345;
 908         int     i;
 909         char name[256];
 910         sfx_t   *sfx;
 911
 912         i = 1;
 913         while (i<Cmd_Argc())
 914         {
 915                 if (!strrchr(Cmd_Argv(i), '.'))
 916                 {
 917                         strcpy(name, Cmd_Argv(i));
 918                         strcat(name, ".wav");
 919                 }
 920                 else
 921                         strcpy(name, Cmd_Argv(i));
 922                 sfx = S_PrecacheSound(name, true);
 923                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0);
 924                 i++;
 925         }
 926 }
 927
 928 void S_Play2(void)
 929 {
 930         static int hash=345;
 931         int     i;
 932         char name[256];
 933         sfx_t   *sfx;
 934
 935         i = 1;
 936         while (i<Cmd_Argc())
 937         {
 938                 if (!strrchr(Cmd_Argv(i), '.'))
 939                 {
 940                         strcpy(name, Cmd_Argv(i));
 941                         strcat(name, ".wav");
 942                 }
 943                 else
 944                         strcpy(name, Cmd_Argv(i));
 945                 sfx = S_PrecacheSound(name, true);
 946                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 0.0);
 947                 i++;
 948         }
 949 }
 950
 951 void S_PlayVol(void)
 952 {
 953         static int hash=543;
 954         int i;
 955         float vol;
 956         char name[256];
 957         sfx_t   *sfx;
 958
 959         i = 1;
 960         while (i<Cmd_Argc())
 961         {
 962                 if (!strrchr(Cmd_Argv(i), '.'))
 963                 {
 964                         strcpy(name, Cmd_Argv(i));
 965                         strcat(name, ".wav");
 966                 }
 967                 else
 968                         strcpy(name, Cmd_Argv(i));
 969                 sfx = S_PrecacheSound(name, true);
 970                 vol = atof(Cmd_Argv(i+1));
 971                 S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0);
 972                 i+=2;
 973         }
 974 }
 975
 976 void S_SoundList(void)
 977 {
 978         int             i;
 979         sfx_t   *sfx;
 980         sfxcache_t      *sc;
 981         int             size, total;
 982
 983         total = 0;
 984         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 985         {
 986                 sc = sfx->sfxcache;
 987                 if (!sc)
 988                         continue;
 989                 size = sc->length*sc->width*(sc->stereo+1);
 990                 total += size;
 991                 if (sc->loopstart >= 0)
 992                         Con_Printf ("L");
 993                 else
 994                         Con_Printf (" ");
 995                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
 996         }
 997         Con_Printf ("Total resident: %i\n", total);
 998 }
 999
1000
1001 void S_LocalSound (char *sound)
1002 {
1003         sfx_t   *sfx;
1004
1005         if (nosound.integer)
1006                 return;
1007         if (!sound_started)
1008                 return;
1009
1010         sfx = S_PrecacheSound (sound, true);
1011         if (!sfx)
1012         {
1013                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1014                 return;
1015         }
1016         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1017 }
1018
1019
1020 void S_ClearPrecache (void)
1021 {
1022 }
1023
1024
1025 void S_BeginPrecaching (void)
1026 {
1027 }
1028
1029
1030 void S_EndPrecaching (void)
1031 {
1032 }
1033