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");
 233         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav");
 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                 {
 284                         return &known_sfx[i];
 285                 }
 286
 287         if (num_sfx == MAX_SFX)
 288                 Sys_Error ("S_FindName: out of sfx_t");
 289
 290         sfx = &known_sfx[i];
 291         strcpy (sfx->name, name);
 292
 293         num_sfx++;
 294
 295         return sfx;
 296 }
 297
 298
 299 /*
 300 ==================
 301 S_TouchSound
 302
 303 ==================
 304 */
 305 void S_TouchSound (char *name)
 306 {
 307         sfx_t   *sfx;
 308
 309         if (!sound_started)
 310                 return;
 311
 312         sfx = S_FindName (name);
 313 }
 314
 315 /*
 316 ==================
 317 S_PrecacheSound
 318
 319 ==================
 320 */
 321 sfx_t *S_PrecacheSound (char *name)
 322 {
 323         sfx_t   *sfx;
 324
 325         if (!sound_started || nosound.integer)
 326                 return NULL;
 327
 328         sfx = S_FindName (name);
 329
 330 // cache it in
 331         if (precache.integer)
 332                 S_LoadSound (sfx);
 333
 334         return sfx;
 335 }
 336
 337
 338 //=============================================================================
 339
 340 /*
 341 =================
 342 SND_PickChannel
 343 =================
 344 */
 345 channel_t *SND_PickChannel(int entnum, int entchannel)
 346 {
 347     int ch_idx;
 348     int first_to_die;
 349     int life_left;
 350
 351 // Check for replacement sound, or find the best one to replace
 352     first_to_die = -1;
 353     life_left = 0x7fffffff;
 354     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 355     {
 356                 if (entchannel != 0             // channel 0 never overrides
 357                 && channels[ch_idx].entnum == entnum
 358                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 359                 {       // always override sound from same entity
 360                         first_to_die = ch_idx;
 361                         break;
 362                 }
 363
 364                 // don't let monster sounds override player sounds
 365                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 366                         continue;
 367
 368                 if (channels[ch_idx].end - paintedtime < life_left)
 369                 {
 370                         life_left = channels[ch_idx].end - paintedtime;
 371                         first_to_die = ch_idx;
 372                 }
 373    }
 374
 375         if (first_to_die == -1)
 376                 return NULL;
 377
 378         if (channels[first_to_die].sfx)
 379                 channels[first_to_die].sfx = NULL;
 380
 381     return &channels[first_to_die];
 382 }
 383
 384 /*
 385 =================
 386 SND_Spatialize
 387 =================
 388 */
 389 void SND_Spatialize(channel_t *ch)
 390 {
 391     vec_t dot;
 392     vec_t dist;
 393     vec_t lscale, rscale, scale;
 394     vec3_t source_vec;
 395         sfx_t *snd;
 396
 397 // anything coming from the view entity will always be full volume
 398 // LordHavoc: make sounds with ATTN_NONE have no spatialization
 399         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 400         {
 401                 ch->leftvol = ch->master_vol;
 402                 ch->rightvol = ch->master_vol;
 403                 return;
 404         }
 405
 406 // calculate stereo seperation and distance attenuation
 407
 408         snd = ch->sfx;
 409         VectorSubtract(ch->origin, listener_origin, source_vec);
 410
 411         dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 412
 413         dot = DotProduct(listener_right, source_vec);
 414
 415         if (shm->channels == 1)
 416         {
 417                 rscale = 1.0;
 418                 lscale = 1.0;
 419         }
 420         else
 421         {
 422                 rscale = 1.0 + dot;
 423                 lscale = 1.0 - dot;
 424         }
 425
 426 // add in distance effect
 427         scale = (1.0 - dist) * rscale;
 428         ch->rightvol = (int) (ch->master_vol * scale);
 429         if (ch->rightvol < 0)
 430                 ch->rightvol = 0;
 431
 432         scale = (1.0 - dist) * lscale;
 433         ch->leftvol = (int) (ch->master_vol * scale);
 434         if (ch->leftvol < 0)
 435                 ch->leftvol = 0;
 436 }
 437
 438
 439 // =======================================================================
 440 // Start a sound effect
 441 // =======================================================================
 442
 443 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 444 {
 445         channel_t *target_chan, *check;
 446         sfxcache_t      *sc;
 447         int             vol;
 448         int             ch_idx;
 449         int             skip;
 450
 451         if (!sound_started)
 452                 return;
 453
 454         if (!sfx)
 455                 return;
 456
 457         if (nosound.integer)
 458                 return;
 459
 460         vol = fvol*255;
 461
 462 // pick a channel to play on
 463         target_chan = SND_PickChannel(entnum, entchannel);
 464         if (!target_chan)
 465                 return;
 466
 467 // spatialize
 468         memset (target_chan, 0, sizeof(*target_chan));
 469         VectorCopy(origin, target_chan->origin);
 470         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 471         target_chan->master_vol = vol;
 472         target_chan->entnum = entnum;
 473         target_chan->entchannel = entchannel;
 474         SND_Spatialize(target_chan);
 475
 476         if (!target_chan->leftvol && !target_chan->rightvol)
 477                 return;         // not audible at all
 478
 479 // new channel
 480         sc = S_LoadSound (sfx);
 481         if (!sc)
 482         {
 483                 target_chan->sfx = NULL;
 484                 return;         // couldn't load the sound's data
 485         }
 486
 487         target_chan->sfx = sfx;
 488         target_chan->pos = 0.0;
 489     target_chan->end = paintedtime + sc->length;
 490
 491 // if an identical sound has also been started this frame, offset the pos
 492 // a bit to keep it from just making the first one louder
 493         check = &channels[NUM_AMBIENTS];
 494     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 495     {
 496                 if (check == target_chan)
 497                         continue;
 498                 if (check->sfx == sfx && !check->pos)
 499                 {
 500                         // LordHavoc: fixed skip calculations
 501                         skip = 0.1 * shm->speed;
 502                         if (skip > sc->length)
 503                                 skip = sc->length;
 504                         if (skip > 0)
 505                                 skip = rand() % skip;
 506                         target_chan->pos += skip;
 507                         target_chan->end -= skip;
 508                         break;
 509                 }
 510
 511         }
 512 }
 513
 514 void S_StopSound(int entnum, int entchannel)
 515 {
 516         int i;
 517
 518         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 519         {
 520                 if (channels[i].entnum == entnum
 521                         && channels[i].entchannel == entchannel)
 522                 {
 523                         channels[i].end = 0;
 524                         channels[i].sfx = NULL;
 525                         return;
 526                 }
 527         }
 528 }
 529
 530 void S_StopAllSounds(qboolean clear)
 531 {
 532         int             i;
 533
 534         if (!sound_started)
 535                 return;
 536
 537         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 538
 539         for (i=0 ; i<MAX_CHANNELS ; i++)
 540                 if (channels[i].sfx)
 541                         channels[i].sfx = NULL;
 542
 543         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 544
 545         if (clear)
 546                 S_ClearBuffer ();
 547 }
 548
 549 void S_StopAllSoundsC (void)
 550 {
 551         S_StopAllSounds (true);
 552 }
 553
 554 void S_ClearBuffer (void)
 555 {
 556         int             clear;
 557
 558 #ifdef _WIN32
 559         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 560 #else
 561         if (!sound_started || !shm || !shm->buffer)
 562 #endif
 563                 return;
 564
 565         if (shm->samplebits == 8)
 566                 clear = 0x80;
 567         else
 568                 clear = 0;
 569
 570 #ifdef _WIN32
 571         if (pDSBuf)
 572         {
 573                 DWORD   dwSize;
 574                 DWORD   *pData;
 575                 int             reps;
 576                 HRESULT hresult;
 577
 578                 reps = 0;
 579
 580                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 581                 {
 582                         if (hresult != DSERR_BUFFERLOST)
 583                         {
 584                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 585                                 S_Shutdown ();
 586                                 return;
 587                         }
 588
 589                         if (++reps > 10000)
 590                         {
 591                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 592                                 S_Shutdown ();
 593                                 return;
 594                         }
 595                 }
 596
 597                 memset(pData, clear, shm->samples * shm->samplebits/8);
 598
 599                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 600
 601         }
 602         else
 603 #endif
 604         {
 605                 int             setsize = shm->samples * shm->samplebits / 8;
 606                 char    *buf = shm->buffer;
 607
 608                 while (setsize--)
 609                         *buf++ = 0;
 610
 611 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 612 // reads the memory area before writing to it causing a seg fault
 613 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 614 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 615         }
 616 }
 617
 618
 619 /*
 620 =================
 621 S_StaticSound
 622 =================
 623 */
 624 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 625 {
 626         channel_t       *ss;
 627         sfxcache_t              *sc;
 628
 629         if (!sfx)
 630                 return;
 631
 632         if (total_channels == MAX_CHANNELS)
 633         {
 634                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 635                 return;
 636         }
 637
 638         ss = &channels[total_channels];
 639         total_channels++;
 640
 641         sc = S_LoadSound (sfx);
 642         if (!sc)
 643                 return;
 644
 645         if (sc->loopstart == -1)
 646         {
 647                 Con_Printf ("Sound %s not looped\n", sfx->name);
 648                 return;
 649         }
 650
 651         ss->sfx = sfx;
 652         VectorCopy (origin, ss->origin);
 653         ss->master_vol = vol;
 654         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 655     ss->end = paintedtime + sc->length;
 656
 657         SND_Spatialize (ss);
 658 }
 659
 660
 661 //=============================================================================
 662
 663 /*
 664 ===================
 665 S_UpdateAmbientSounds
 666 ===================
 667 */
 668 void S_UpdateAmbientSounds (void)
 669 {
 670         mleaf_t         *l;
 671         float           vol;
 672         int                     ambient_channel;
 673         channel_t       *chan;
 674
 675         // LordHavoc: kill ambient sounds until proven otherwise
 676         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 677                 channels[ambient_channel].sfx = NULL;
 678
 679         if (!snd_ambient || !cl.worldmodel || ambient_level.value <= 0)
 680                 return;
 681
 682         l = Mod_PointInLeaf (listener_origin, cl.worldmodel);
 683         if (!l)
 684                 return;
 685
 686 // calc ambient sound levels
 687         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 688         {
 689                 chan = &channels[ambient_channel];
 690                 chan->sfx = ambient_sfx[ambient_channel];
 691
 692                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 693                 if (vol < 8)
 694                         vol = 0;
 695
 696         // don't adjust volume too fast
 697                 if (chan->master_vol < vol)
 698                 {
 699                         chan->master_vol += host_realframetime * ambient_fade.value;
 700                         if (chan->master_vol > vol)
 701                                 chan->master_vol = vol;
 702                 }
 703                 else if (chan->master_vol > vol)
 704                 {
 705                         chan->master_vol -= host_realframetime * ambient_fade.value;
 706                         if (chan->master_vol < vol)
 707                                 chan->master_vol = vol;
 708                 }
 709
 710                 chan->leftvol = chan->rightvol = chan->master_vol;
 711         }
 712 }
 713
 714
 715 /*
 716 ============
 717 S_Update
 718
 719 Called once each time through the main loop
 720 ============
 721 */
 722 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 723 {
 724         int                     i, j;
 725         int                     total;
 726         channel_t       *ch;
 727         channel_t       *combine;
 728
 729         if (!sound_started || (snd_blocked > 0))
 730                 return;
 731
 732         VectorCopy(origin, listener_origin);
 733         VectorCopy(forward, listener_forward);
 734         VectorCopy(right, listener_right);
 735         VectorCopy(up, listener_up);
 736
 737 // update general area ambient sound sources
 738         S_UpdateAmbientSounds ();
 739
 740         combine = NULL;
 741
 742 // update spatialization for static and dynamic sounds
 743         ch = channels+NUM_AMBIENTS;
 744         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 745         {
 746                 if (!ch->sfx)
 747                         continue;
 748                 SND_Spatialize(ch);         // respatialize channel
 749                 if (!ch->leftvol && !ch->rightvol)
 750                         continue;
 751
 752         // try to combine static sounds with a previous channel of the same
 753         // sound effect so we don't mix five torches every frame
 754
 755                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 756                 {
 757                 // see if it can just use the last one
 758                         if (combine && combine->sfx == ch->sfx)
 759                         {
 760                                 combine->leftvol += ch->leftvol;
 761                                 combine->rightvol += ch->rightvol;
 762                                 ch->leftvol = ch->rightvol = 0;
 763                                 continue;
 764                         }
 765                 // search for one
 766                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 767                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 768                                 if (combine->sfx == ch->sfx)
 769                                         break;
 770
 771                         if (j == total_channels)
 772                         {
 773                                 combine = NULL;
 774                         }
 775                         else
 776                         {
 777                                 if (combine != ch)
 778                                 {
 779                                         combine->leftvol += ch->leftvol;
 780                                         combine->rightvol += ch->rightvol;
 781                                         ch->leftvol = ch->rightvol = 0;
 782                                 }
 783                                 continue;
 784                         }
 785                 }
 786         }
 787
 788 //
 789 // debugging output
 790 //
 791         if (snd_show.integer)
 792         {
 793                 total = 0;
 794                 ch = channels;
 795                 for (i=0 ; i<total_channels; i++, ch++)
 796                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 797                                 total++;
 798
 799                 Con_Printf ("----(%i)----\n", total);
 800         }
 801
 802 // mix some sound
 803         S_Update_();
 804 }
 805
 806 void GetSoundtime(void)
 807 {
 808         int             samplepos;
 809         static  int             buffers;
 810         static  int             oldsamplepos;
 811         int             fullsamples;
 812
 813         fullsamples = shm->samples / shm->channels;
 814
 815 // it is possible to miscount buffers if it has wrapped twice between
 816 // calls to S_Update.  Oh well.
 817 #ifdef __sun__
 818         soundtime = SNDDMA_GetSamples();
 819 #else
 820         samplepos = SNDDMA_GetDMAPos();
 821
 822
 823         if (samplepos < oldsamplepos)
 824         {
 825                 buffers++;                                      // buffer wrapped
 826
 827                 if (paintedtime > 0x40000000)
 828                 {       // time to chop things off to avoid 32 bit limits
 829                         buffers = 0;
 830                         paintedtime = fullsamples;
 831                         S_StopAllSounds (true);
 832                 }
 833         }
 834         oldsamplepos = samplepos;
 835
 836         soundtime = buffers*fullsamples + samplepos/shm->channels;
 837 #endif
 838 }
 839
 840 void IN_Accumulate (void);
 841
 842 void S_ExtraUpdate (void)
 843 {
 844
 845 #ifdef _WIN32
 846         IN_Accumulate ();
 847 #endif
 848
 849         if (snd_noextraupdate.integer)
 850                 return;         // don't pollute timings
 851         S_Update_();
 852 }
 853
 854 void S_Update_(void)
 855 {
 856         unsigned        endtime;
 857         int                             samps;
 858
 859         if (!sound_started || (snd_blocked > 0))
 860                 return;
 861
 862 // Updates DMA time
 863         GetSoundtime();
 864
 865 // check to make sure that we haven't overshot
 866         if (paintedtime < soundtime)
 867                 paintedtime = soundtime;
 868
 869 // mix ahead of current position
 870         endtime = soundtime + _snd_mixahead.value * shm->speed;
 871         samps = shm->samples >> (shm->channels-1);
 872         if (endtime - soundtime > samps)
 873                 endtime = soundtime + samps;
 874
 875 #ifdef _WIN32
 876 // if the buffer was lost or stopped, restore it and/or restart it
 877         {
 878                 DWORD   dwStatus;
 879
 880                 if (pDSBuf)
 881                 {
 882                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 883                                 Con_Printf ("Couldn't get sound buffer status\n");
 884
 885                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 886                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 887
 888                         if (!(dwStatus & DSBSTATUS_PLAYING))
 889                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 890                 }
 891         }
 892 #endif
 893
 894         S_PaintChannels (endtime);
 895
 896         SNDDMA_Submit ();
 897 }
 898
 899 /*
 900 ===============================================================================
 901
 902 console functions
 903
 904 ===============================================================================
 905 */
 906
 907 void S_Play(void)
 908 {
 909         static int hash=345;
 910         int     i;
 911         char name[256];
 912         sfx_t   *sfx;
 913
 914         i = 1;
 915         while (i<Cmd_Argc())
 916         {
 917                 if (!strrchr(Cmd_Argv(i), '.'))
 918                 {
 919                         strcpy(name, Cmd_Argv(i));
 920                         strcat(name, ".wav");
 921                 }
 922                 else
 923                         strcpy(name, Cmd_Argv(i));
 924                 sfx = S_PrecacheSound(name);
 925                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0);
 926                 i++;
 927         }
 928 }
 929
 930 void S_Play2(void)
 931 {
 932         static int hash=345;
 933         int     i;
 934         char name[256];
 935         sfx_t   *sfx;
 936
 937         i = 1;
 938         while (i<Cmd_Argc())
 939         {
 940                 if (!strrchr(Cmd_Argv(i), '.'))
 941                 {
 942                         strcpy(name, Cmd_Argv(i));
 943                         strcat(name, ".wav");
 944                 }
 945                 else
 946                         strcpy(name, Cmd_Argv(i));
 947                 sfx = S_PrecacheSound(name);
 948                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 0.0);
 949                 i++;
 950         }
 951 }
 952
 953 void S_PlayVol(void)
 954 {
 955         static int hash=543;
 956         int i;
 957         float vol;
 958         char name[256];
 959         sfx_t   *sfx;
 960
 961         i = 1;
 962         while (i<Cmd_Argc())
 963         {
 964                 if (!strrchr(Cmd_Argv(i), '.'))
 965                 {
 966                         strcpy(name, Cmd_Argv(i));
 967                         strcat(name, ".wav");
 968                 }
 969                 else
 970                         strcpy(name, Cmd_Argv(i));
 971                 sfx = S_PrecacheSound(name);
 972                 vol = atof(Cmd_Argv(i+1));
 973                 S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0);
 974                 i+=2;
 975         }
 976 }
 977
 978 void S_SoundList(void)
 979 {
 980         int             i;
 981         sfx_t   *sfx;
 982         sfxcache_t      *sc;
 983         int             size, total;
 984
 985         total = 0;
 986         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 987         {
 988                 sc = sfx->sfxcache;
 989                 if (!sc)
 990                         continue;
 991                 size = sc->length*sc->width*(sc->stereo+1);
 992                 total += size;
 993                 if (sc->loopstart >= 0)
 994                         Con_Printf ("L");
 995                 else
 996                         Con_Printf (" ");
 997                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
 998         }
 999         Con_Printf ("Total resident: %i\n", total);
1000 }
1001
1002
1003 void S_LocalSound (char *sound)
1004 {
1005         sfx_t   *sfx;
1006
1007         if (nosound.integer)
1008                 return;
1009         if (!sound_started)
1010                 return;
1011
1012         sfx = S_PrecacheSound (sound);
1013         if (!sfx)
1014         {
1015                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1016                 return;
1017         }
1018         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1019 }
1020
1021
1022 void S_ClearPrecache (void)
1023 {
1024 }
1025
1026
1027 void S_BeginPrecaching (void)
1028 {
1029 }
1030
1031
1032 void S_EndPrecaching (void)
1033 {
1034 }
1035