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_Play2(void);
  31 void S_SoundList(void);
  32 void S_Update_();
  33 void S_StopAllSounds(qboolean clear);
  34 void S_StopAllSoundsC(void);
  35
  36 // =======================================================================
  37 // Internal sound data & structures
  38 // =======================================================================
  39
  40 channel_t channels[MAX_CHANNELS];
  41 int total_channels;
  42
  43 int snd_blocked = 0;
  44 static qboolean snd_ambient = 1;
  45 qboolean snd_initialized = false;
  46
  47 // pointer should go away
  48 volatile dma_t *shm = 0;
  49 volatile dma_t sn;
  50
  51 vec3_t listener_origin;
  52 vec3_t listener_forward;
  53 vec3_t listener_right;
  54 vec3_t listener_up;
  55 vec_t sound_nominal_clip_dist=1000.0;
  56 mempool_t *snd_mempool;
  57
  58 // sample PAIRS
  59 int soundtime;
  60 int paintedtime;
  61
  62
  63 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  64 #define MAX_SFX 4096
  65 sfx_t *known_sfx; // allocated [MAX_SFX]
  66 int num_sfx;
  67
  68 sfx_t *ambient_sfx[NUM_AMBIENTS];
  69
  70 int sound_started = 0;
  71
  72 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  73 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  74
  75 cvar_t nosound = {0, "nosound", "0"};
  76 cvar_t precache = {0, "precache", "1"};
  77 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  78 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  79 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  80 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  81 cvar_t snd_show = {0, "snd_show", "0"};
  82 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  83 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  84
  85
  86 // ====================================================================
  87 // User-setable variables
  88 // ====================================================================
  89
  90
  91 //
  92 // Fake dma is a synchronous faking of the DMA progress used for
  93 // isolating performance in the renderer.  The fakedma_updates is
  94 // number of times S_Update() is called per second.
  95 //
  96
  97 qboolean fakedma = false;
  98 int fakedma_updates = 15;
  99
 100
 101 void S_AmbientOff (void)
 102 {
 103         snd_ambient = false;
 104 }
 105
 106
 107 void S_AmbientOn (void)
 108 {
 109         snd_ambient = true;
 110 }
 111
 112
 113 void S_SoundInfo_f(void)
 114 {
 115         if (!sound_started || !shm)
 116         {
 117                 Con_Printf ("sound system not started\n");
 118                 return;
 119         }
 120
 121         Con_Printf("%5d stereo\n", shm->channels - 1);
 122         Con_Printf("%5d samples\n", shm->samples);
 123         Con_Printf("%5d samplepos\n", shm->samplepos);
 124         Con_Printf("%5d samplebits\n", shm->samplebits);
 125         Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
 126         Con_Printf("%5d speed\n", shm->speed);
 127         Con_Printf("0x%x dma buffer\n", shm->buffer);
 128         Con_Printf("%5d total_channels\n", total_channels);
 129 }
 130
 131
 132 /*
 133 ================
 134 S_Startup
 135 ================
 136 */
 137 void S_Startup (void)
 138 {
 139         int rc;
 140
 141         if (!snd_initialized)
 142                 return;
 143
 144         if (!fakedma)
 145         {
 146                 rc = SNDDMA_Init();
 147
 148                 if (!rc)
 149                 {
 150                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
 151                         sound_started = 0;
 152                         return;
 153                 }
 154         }
 155
 156         sound_started = 1;
 157 }
 158
 159 /*
 160 ================
 161 S_Init
 162 ================
 163 */
 164 void S_Init (void)
 165 {
 166         Con_Printf("\nSound Initialization\n");
 167
 168         S_RawSamples_ClearQueue();
 169
 170         Cvar_RegisterVariable(&volume);
 171         Cvar_RegisterVariable(&bgmvolume);
 172
 173         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 174                 return;
 175
 176         snd_mempool = Mem_AllocPool("sound");
 177
 178         if (COM_CheckParm("-simsound"))
 179                 fakedma = true;
 180
 181         Cmd_AddCommand("play", S_Play);
 182         Cmd_AddCommand("play2", S_Play2);
 183         Cmd_AddCommand("playvol", S_PlayVol);
 184         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 185         Cmd_AddCommand("soundlist", S_SoundList);
 186         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 187
 188         Cvar_RegisterVariable(&nosound);
 189         Cvar_RegisterVariable(&precache);
 190         Cvar_RegisterVariable(&bgmbuffer);
 191         Cvar_RegisterVariable(&ambient_level);
 192         Cvar_RegisterVariable(&ambient_fade);
 193         Cvar_RegisterVariable(&snd_noextraupdate);
 194         Cvar_RegisterVariable(&snd_show);
 195         Cvar_RegisterVariable(&_snd_mixahead);
 196         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 197
 198         snd_initialized = true;
 199
 200         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 201         num_sfx = 0;
 202
 203         S_Startup ();
 204
 205         SND_InitScaletable ();
 206
 207 // create a piece of DMA memory
 208
 209         if (fakedma)
 210         {
 211                 shm = (void *) Mem_Alloc(snd_mempool, sizeof(*shm));
 212                 shm->splitbuffer = 0;
 213                 shm->samplebits = 16;
 214                 shm->speed = 22050;
 215                 shm->channels = 2;
 216                 shm->samples = 32768;
 217                 shm->samplepos = 0;
 218                 shm->soundalive = true;
 219                 shm->gamealive = true;
 220                 shm->submission_chunk = 1;
 221                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
 222         }
 223
 224         if (!sound_started)
 225                 return;
 226
 227         Con_Printf ("Sound sampling rate: %i\n", shm->speed);
 228
 229         // provides a tick sound until washed clean
 230
 231         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 232         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 233
 234         S_StopAllSounds (true);
 235 }
 236
 237
 238 // =======================================================================
 239 // Shutdown sound engine
 240 // =======================================================================
 241
 242 void S_Shutdown(void)
 243 {
 244         if (!sound_started)
 245                 return;
 246
 247         if (shm)
 248                 shm->gamealive = 0;
 249
 250         shm = 0;
 251         sound_started = 0;
 252
 253         if (!fakedma)
 254                 SNDDMA_Shutdown();
 255 }
 256
 257
 258 // =======================================================================
 259 // Load a sound
 260 // =======================================================================
 261
 262 /*
 263 ==================
 264 S_FindName
 265
 266 ==================
 267 */
 268 sfx_t *S_FindName (char *name)
 269 {
 270         int i;
 271         sfx_t *sfx;
 272
 273         if (!name)
 274                 Host_Error ("S_FindName: NULL\n");
 275
 276         if (strlen(name) >= MAX_QPATH)
 277                 Host_Error ("Sound name too long: %s", name);
 278
 279 // see if already loaded
 280         for (i = 0;i < num_sfx;i++)
 281                 if (!strcmp(known_sfx[i].name, name))
 282                         return &known_sfx[i];
 283
 284         if (num_sfx == MAX_SFX)
 285                 Sys_Error ("S_FindName: out of sfx_t");
 286
 287         sfx = &known_sfx[i];
 288         strcpy (sfx->name, name);
 289
 290         num_sfx++;
 291
 292         return sfx;
 293 }
 294
 295
 296 /*
 297 ==================
 298 S_TouchSound
 299
 300 ==================
 301 */
 302 void S_TouchSound (char *name)
 303 {
 304         sfx_t   *sfx;
 305
 306         if (!sound_started)
 307                 return;
 308
 309         sfx = S_FindName (name);
 310 }
 311
 312 /*
 313 ==================
 314 S_PrecacheSound
 315
 316 ==================
 317 */
 318 sfx_t *S_PrecacheSound (char *name, int complain)
 319 {
 320         sfx_t *sfx;
 321
 322         if (!sound_started || nosound.integer)
 323                 return NULL;
 324
 325         sfx = S_FindName (name);
 326
 327 // cache it in
 328         if (precache.integer)
 329                 S_LoadSound (sfx, complain);
 330
 331         return sfx;
 332 }
 333
 334
 335 //=============================================================================
 336
 337 /*
 338 =================
 339 SND_PickChannel
 340 =================
 341 */
 342 channel_t *SND_PickChannel(int entnum, int entchannel)
 343 {
 344     int ch_idx;
 345     int first_to_die;
 346     int life_left;
 347
 348 // Check for replacement sound, or find the best one to replace
 349     first_to_die = -1;
 350     life_left = 0x7fffffff;
 351     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 352     {
 353                 if (entchannel != 0             // channel 0 never overrides
 354                 && channels[ch_idx].entnum == entnum
 355                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 356                 {       // always override sound from same entity
 357                         first_to_die = ch_idx;
 358                         break;
 359                 }
 360
 361                 // don't let monster sounds override player sounds
 362                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 363                         continue;
 364
 365                 if (channels[ch_idx].end - paintedtime < life_left)
 366                 {
 367                         life_left = channels[ch_idx].end - paintedtime;
 368                         first_to_die = ch_idx;
 369                 }
 370    }
 371
 372         if (first_to_die == -1)
 373                 return NULL;
 374
 375         if (channels[first_to_die].sfx)
 376                 channels[first_to_die].sfx = NULL;
 377
 378     return &channels[first_to_die];
 379 }
 380
 381 /*
 382 =================
 383 SND_Spatialize
 384 =================
 385 */
 386 void SND_Spatialize(channel_t *ch)
 387 {
 388     vec_t dot;
 389     vec_t dist;
 390     vec_t lscale, rscale, scale;
 391     vec3_t source_vec;
 392         sfx_t *snd;
 393
 394 // anything coming from the view entity will always be full volume
 395 // LordHavoc: make sounds with ATTN_NONE have no spatialization
 396         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 397         {
 398                 ch->leftvol = ch->master_vol;
 399                 ch->rightvol = ch->master_vol;
 400                 return;
 401         }
 402
 403 // calculate stereo seperation and distance attenuation
 404
 405         snd = ch->sfx;
 406         VectorSubtract(ch->origin, listener_origin, source_vec);
 407
 408         dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 409
 410         dot = DotProduct(listener_right, source_vec);
 411
 412         if (shm->channels == 1)
 413         {
 414                 rscale = 1.0;
 415                 lscale = 1.0;
 416         }
 417         else
 418         {
 419                 rscale = 1.0 + dot;
 420                 lscale = 1.0 - dot;
 421         }
 422
 423 // add in distance effect
 424         scale = (1.0 - dist) * rscale;
 425         ch->rightvol = (int) (ch->master_vol * scale);
 426         if (ch->rightvol < 0)
 427                 ch->rightvol = 0;
 428
 429         scale = (1.0 - dist) * lscale;
 430         ch->leftvol = (int) (ch->master_vol * scale);
 431         if (ch->leftvol < 0)
 432                 ch->leftvol = 0;
 433 }
 434
 435
 436 // =======================================================================
 437 // Start a sound effect
 438 // =======================================================================
 439
 440 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 441 {
 442         channel_t *target_chan, *check;
 443         sfxcache_t      *sc;
 444         int             vol;
 445         int             ch_idx;
 446         int             skip;
 447
 448         if (!sound_started)
 449                 return;
 450
 451         if (!sfx)
 452                 return;
 453
 454         if (nosound.integer)
 455                 return;
 456
 457         vol = fvol*255;
 458
 459 // pick a channel to play on
 460         target_chan = SND_PickChannel(entnum, entchannel);
 461         if (!target_chan)
 462                 return;
 463
 464 // spatialize
 465         memset (target_chan, 0, sizeof(*target_chan));
 466         VectorCopy(origin, target_chan->origin);
 467         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 468         target_chan->master_vol = vol;
 469         target_chan->entnum = entnum;
 470         target_chan->entchannel = entchannel;
 471         SND_Spatialize(target_chan);
 472
 473         if (!target_chan->leftvol && !target_chan->rightvol)
 474                 return;         // not audible at all
 475
 476 // new channel
 477         sc = S_LoadSound (sfx, true);
 478         if (!sc)
 479         {
 480                 target_chan->sfx = NULL;
 481                 return;         // couldn't load the sound's data
 482         }
 483
 484         target_chan->sfx = sfx;
 485         target_chan->pos = 0.0;
 486     target_chan->end = paintedtime + sc->length;
 487
 488 // if an identical sound has also been started this frame, offset the pos
 489 // a bit to keep it from just making the first one louder
 490         check = &channels[NUM_AMBIENTS];
 491     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 492     {
 493                 if (check == target_chan)
 494                         continue;
 495                 if (check->sfx == sfx && !check->pos)
 496                 {
 497                         // LordHavoc: fixed skip calculations
 498                         skip = 0.1 * shm->speed;
 499                         if (skip > sc->length)
 500                                 skip = sc->length;
 501                         if (skip > 0)
 502                                 skip = rand() % skip;
 503                         target_chan->pos += skip;
 504                         target_chan->end -= skip;
 505                         break;
 506                 }
 507
 508         }
 509 }
 510
 511 void S_StopSound(int entnum, int entchannel)
 512 {
 513         int i;
 514
 515         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 516         {
 517                 if (channels[i].entnum == entnum
 518                         && channels[i].entchannel == entchannel)
 519                 {
 520                         channels[i].end = 0;
 521                         channels[i].sfx = NULL;
 522                         return;
 523                 }
 524         }
 525 }
 526
 527 void S_StopAllSounds(qboolean clear)
 528 {
 529         int             i;
 530
 531         if (!sound_started)
 532                 return;
 533
 534         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 535
 536         for (i=0 ; i<MAX_CHANNELS ; i++)
 537                 if (channels[i].sfx)
 538                         channels[i].sfx = NULL;
 539
 540         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 541
 542         if (clear)
 543                 S_ClearBuffer ();
 544 }
 545
 546 void S_StopAllSoundsC (void)
 547 {
 548         S_StopAllSounds (true);
 549 }
 550
 551 void S_ClearBuffer (void)
 552 {
 553         int             clear;
 554
 555 #ifdef _WIN32
 556         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 557 #else
 558         if (!sound_started || !shm || !shm->buffer)
 559 #endif
 560                 return;
 561
 562         if (shm->samplebits == 8)
 563                 clear = 0x80;
 564         else
 565                 clear = 0;
 566
 567 #ifdef _WIN32
 568         if (pDSBuf)
 569         {
 570                 DWORD   dwSize;
 571                 DWORD   *pData;
 572                 int             reps;
 573                 HRESULT hresult;
 574
 575                 reps = 0;
 576
 577                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 578                 {
 579                         if (hresult != DSERR_BUFFERLOST)
 580                         {
 581                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 582                                 S_Shutdown ();
 583                                 return;
 584                         }
 585
 586                         if (++reps > 10000)
 587                         {
 588                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 589                                 S_Shutdown ();
 590                                 return;
 591                         }
 592                 }
 593
 594                 memset(pData, clear, shm->samples * shm->samplebits/8);
 595
 596                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 597
 598         }
 599         else
 600 #endif
 601         {
 602                 int             setsize = shm->samples * shm->samplebits / 8;
 603                 char    *buf = shm->buffer;
 604
 605                 while (setsize--)
 606                         *buf++ = 0;
 607
 608 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 609 // reads the memory area before writing to it causing a seg fault
 610 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 611 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 612         }
 613 }
 614
 615
 616 /*
 617 =================
 618 S_StaticSound
 619 =================
 620 */
 621 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 622 {
 623         channel_t       *ss;
 624         sfxcache_t              *sc;
 625
 626         if (!sfx)
 627                 return;
 628
 629         if (total_channels == MAX_CHANNELS)
 630         {
 631                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 632                 return;
 633         }
 634
 635         ss = &channels[total_channels];
 636         total_channels++;
 637
 638         sc = S_LoadSound (sfx, true);
 639         if (!sc)
 640                 return;
 641
 642         if (sc->loopstart == -1)
 643         {
 644                 Con_Printf ("Sound %s not looped\n", sfx->name);
 645                 return;
 646         }
 647
 648         ss->sfx = sfx;
 649         VectorCopy (origin, ss->origin);
 650         ss->master_vol = vol;
 651         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 652     ss->end = paintedtime + sc->length;
 653
 654         SND_Spatialize (ss);
 655 }
 656
 657
 658 //=============================================================================
 659
 660 /*
 661 ===================
 662 S_UpdateAmbientSounds
 663 ===================
 664 */
 665 void S_UpdateAmbientSounds (void)
 666 {
 667         mleaf_t         *l;
 668         float           vol;
 669         int                     ambient_channel;
 670         channel_t       *chan;
 671
 672         // LordHavoc: kill ambient sounds until proven otherwise
 673         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 674                 channels[ambient_channel].sfx = NULL;
 675
 676         if (!snd_ambient || !cl.worldmodel || ambient_level.value <= 0)
 677                 return;
 678
 679         l = Mod_PointInLeaf (listener_origin, cl.worldmodel);
 680         if (!l)
 681                 return;
 682
 683 // calc ambient sound levels
 684         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 685         {
 686                 chan = &channels[ambient_channel];
 687                 chan->sfx = ambient_sfx[ambient_channel];
 688
 689                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 690                 if (vol < 8)
 691                         vol = 0;
 692
 693         // don't adjust volume too fast
 694                 if (chan->master_vol < vol)
 695                 {
 696                         chan->master_vol += host_realframetime * ambient_fade.value;
 697                         if (chan->master_vol > vol)
 698                                 chan->master_vol = vol;
 699                 }
 700                 else if (chan->master_vol > vol)
 701                 {
 702                         chan->master_vol -= host_realframetime * ambient_fade.value;
 703                         if (chan->master_vol < vol)
 704                                 chan->master_vol = vol;
 705                 }
 706
 707                 chan->leftvol = chan->rightvol = chan->master_vol;
 708         }
 709 }
 710
 711
 712 /*
 713 ============
 714 S_Update
 715
 716 Called once each time through the main loop
 717 ============
 718 */
 719 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 720 {
 721         int                     i, j;
 722         int                     total;
 723         channel_t       *ch;
 724         channel_t       *combine;
 725
 726         if (!sound_started || (snd_blocked > 0))
 727                 return;
 728
 729         VectorCopy(origin, listener_origin);
 730         VectorCopy(forward, listener_forward);
 731         VectorCopy(right, listener_right);
 732         VectorCopy(up, listener_up);
 733
 734 // update general area ambient sound sources
 735         S_UpdateAmbientSounds ();
 736
 737         combine = NULL;
 738
 739 // update spatialization for static and dynamic sounds
 740         ch = channels+NUM_AMBIENTS;
 741         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 742         {
 743                 if (!ch->sfx)
 744                         continue;
 745                 SND_Spatialize(ch);         // respatialize channel
 746                 if (!ch->leftvol && !ch->rightvol)
 747                         continue;
 748
 749         // try to combine static sounds with a previous channel of the same
 750         // sound effect so we don't mix five torches every frame
 751
 752                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 753                 {
 754                 // see if it can just use the last one
 755                         if (combine && combine->sfx == ch->sfx)
 756                         {
 757                                 combine->leftvol += ch->leftvol;
 758                                 combine->rightvol += ch->rightvol;
 759                                 ch->leftvol = ch->rightvol = 0;
 760                                 continue;
 761                         }
 762                 // search for one
 763                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 764                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 765                                 if (combine->sfx == ch->sfx)
 766                                         break;
 767
 768                         if (j == total_channels)
 769                         {
 770                                 combine = NULL;
 771                         }
 772                         else
 773                         {
 774                                 if (combine != ch)
 775                                 {
 776                                         combine->leftvol += ch->leftvol;
 777                                         combine->rightvol += ch->rightvol;
 778                                         ch->leftvol = ch->rightvol = 0;
 779                                 }
 780                                 continue;
 781                         }
 782                 }
 783         }
 784
 785 //
 786 // debugging output
 787 //
 788         if (snd_show.integer)
 789         {
 790                 total = 0;
 791                 ch = channels;
 792                 for (i=0 ; i<total_channels; i++, ch++)
 793                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 794                                 total++;
 795
 796                 Con_Printf ("----(%i)----\n", total);
 797         }
 798
 799 // mix some sound
 800         S_Update_();
 801 }
 802
 803 void GetSoundtime(void)
 804 {
 805         int             samplepos;
 806         static  int             buffers;
 807         static  int             oldsamplepos;
 808         int             fullsamples;
 809
 810         fullsamples = shm->samples / shm->channels;
 811
 812 // it is possible to miscount buffers if it has wrapped twice between
 813 // calls to S_Update.  Oh well.
 814 #ifdef __sun__
 815         soundtime = SNDDMA_GetSamples();
 816 #else
 817         samplepos = SNDDMA_GetDMAPos();
 818
 819
 820         if (samplepos < oldsamplepos)
 821         {
 822                 buffers++;                                      // buffer wrapped
 823
 824                 if (paintedtime > 0x40000000)
 825                 {       // time to chop things off to avoid 32 bit limits
 826                         buffers = 0;
 827                         paintedtime = fullsamples;
 828                         S_StopAllSounds (true);
 829                 }
 830         }
 831         oldsamplepos = samplepos;
 832
 833         soundtime = buffers*fullsamples + samplepos/shm->channels;
 834 #endif
 835 }
 836
 837 void IN_Accumulate (void);
 838
 839 void S_ExtraUpdate (void)
 840 {
 841
 842 #ifdef _WIN32
 843         IN_Accumulate ();
 844 #endif
 845
 846         if (snd_noextraupdate.integer)
 847                 return;         // don't pollute timings
 848         S_Update_();
 849 }
 850
 851 void S_Update_(void)
 852 {
 853         unsigned        endtime;
 854         int                             samps;
 855
 856         if (!sound_started || (snd_blocked > 0))
 857                 return;
 858
 859 // Updates DMA time
 860         GetSoundtime();
 861
 862 // check to make sure that we haven't overshot
 863         if (paintedtime < soundtime)
 864                 paintedtime = soundtime;
 865
 866 // mix ahead of current position
 867         endtime = soundtime + _snd_mixahead.value * shm->speed;
 868         samps = shm->samples >> (shm->channels-1);
 869         if (endtime - soundtime > samps)
 870                 endtime = soundtime + samps;
 871
 872 #ifdef _WIN32
 873 // if the buffer was lost or stopped, restore it and/or restart it
 874         {
 875                 DWORD   dwStatus;
 876
 877                 if (pDSBuf)
 878                 {
 879                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 880                                 Con_Printf ("Couldn't get sound buffer status\n");
 881
 882                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 883                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 884
 885                         if (!(dwStatus & DSBSTATUS_PLAYING))
 886                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 887                 }
 888         }
 889 #endif
 890
 891         S_PaintChannels (endtime);
 892
 893         SNDDMA_Submit ();
 894 }
 895
 896 /*
 897 ===============================================================================
 898
 899 console functions
 900
 901 ===============================================================================
 902 */
 903
 904 void S_Play(void)
 905 {
 906         static int hash=345;
 907         int     i;
 908         char name[256];
 909         sfx_t   *sfx;
 910
 911         i = 1;
 912         while (i<Cmd_Argc())
 913         {
 914                 if (!strrchr(Cmd_Argv(i), '.'))
 915                 {
 916                         strcpy(name, Cmd_Argv(i));
 917                         strcat(name, ".wav");
 918                 }
 919                 else
 920                         strcpy(name, Cmd_Argv(i));
 921                 sfx = S_PrecacheSound(name, true);
 922                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0);
 923                 i++;
 924         }
 925 }
 926
 927 void S_Play2(void)
 928 {
 929         static int hash=345;
 930         int     i;
 931         char name[256];
 932         sfx_t   *sfx;
 933
 934         i = 1;
 935         while (i<Cmd_Argc())
 936         {
 937                 if (!strrchr(Cmd_Argv(i), '.'))
 938                 {
 939                         strcpy(name, Cmd_Argv(i));
 940                         strcat(name, ".wav");
 941                 }
 942                 else
 943                         strcpy(name, Cmd_Argv(i));
 944                 sfx = S_PrecacheSound(name, true);
 945                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 0.0);
 946                 i++;
 947         }
 948 }
 949
 950 void S_PlayVol(void)
 951 {
 952         static int hash=543;
 953         int i;
 954         float vol;
 955         char name[256];
 956         sfx_t   *sfx;
 957
 958         i = 1;
 959         while (i<Cmd_Argc())
 960         {
 961                 if (!strrchr(Cmd_Argv(i), '.'))
 962                 {
 963                         strcpy(name, Cmd_Argv(i));
 964                         strcat(name, ".wav");
 965                 }
 966                 else
 967                         strcpy(name, Cmd_Argv(i));
 968                 sfx = S_PrecacheSound(name, true);
 969                 vol = atof(Cmd_Argv(i+1));
 970                 S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0);
 971                 i+=2;
 972         }
 973 }
 974
 975 void S_SoundList(void)
 976 {
 977         int             i;
 978         sfx_t   *sfx;
 979         sfxcache_t      *sc;
 980         int             size, total;
 981
 982         total = 0;
 983         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 984         {
 985                 sc = sfx->sfxcache;
 986                 if (!sc)
 987                         continue;
 988                 size = sc->length*sc->width*(sc->stereo+1);
 989                 total += size;
 990                 if (sc->loopstart >= 0)
 991                         Con_Printf ("L");
 992                 else
 993                         Con_Printf (" ");
 994                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
 995         }
 996         Con_Printf ("Total resident: %i\n", total);
 997 }
 998
 999
1000 void S_LocalSound (char *sound)
1001 {
1002         sfx_t   *sfx;
1003
1004         if (nosound.integer)
1005                 return;
1006         if (!sound_started)
1007                 return;
1008
1009         sfx = S_PrecacheSound (sound, true);
1010         if (!sfx)
1011         {
1012                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1013                 return;
1014         }
1015         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1016 }
1017
1018
1019 void S_ClearPrecache (void)
1020 {
1021 }
1022
1023
1024 void S_BeginPrecaching (void)
1025 {
1026 }
1027
1028
1029 void S_EndPrecaching (void)
1030 {
1031 }
1032
1033
1034 #define RAWSAMPLESBUFFER 32768
1035 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1036 int s_rawsamplesbuffer_start;
1037 int s_rawsamplesbuffer_count;
1038
1039 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1040 {
1041         int b2, b3;
1042         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1043         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1044                 return;
1045         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1046         if (b2 + length > RAWSAMPLESBUFFER)
1047         {
1048                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1049                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1050                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1051         }
1052         else
1053                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1054         s_rawsamplesbuffer_count += length;
1055 }
1056
1057 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1058 {
1059         int b1, b2, l;
1060         int i;
1061         short *in;
1062         int *out;
1063         int count;
1064         l = length;
1065         if (l > s_rawsamplesbuffer_count)
1066                 l = s_rawsamplesbuffer_count;
1067         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1068         if (b1 + l > RAWSAMPLESBUFFER)
1069         {
1070                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1071                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1072                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1073                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1074                         out[i] = in[i];
1075                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1076                         out[i] = in[i];
1077                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1078         }
1079         else
1080         {
1081                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1082                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1083                         out[i] = in[i];
1084                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1085         }
1086         if (l < length)
1087         {
1088                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1089                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1090         }
1091         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1092         s_rawsamplesbuffer_count -= l;
1093 }
1094
1095 void S_RawSamples_ClearQueue(void)
1096 {
1097         s_rawsamplesbuffer_count = 0;
1098         s_rawsamplesbuffer_start = 0;
1099 }
1100
1101 int S_RawSamples_QueueWantsMore(void)
1102 {
1103         if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1104                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1105         else
1106                 return 0;
1107 }
1108
1109 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1110 {
1111         if (inputlength != outputlength)
1112         {
1113                 int i, position, stopposition, step;
1114                 short *in, *out;
1115                 step = (float) inputlength * 256.0f / (float) outputlength;
1116                 position = 0;
1117                 stopposition = (inputlength - 1) << 8;
1118                 out = output;
1119                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1120                 {
1121                         in = input + ((position >> 8) << 1);
1122                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1123                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1124                         out += 2;
1125                 }
1126                 stopposition = inputlength << 8;
1127                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1128                 {
1129                         in = input + ((position >> 8) << 1);
1130                         out[0] = in[0];
1131                         out[1] = in[2];
1132                         out += 2;
1133                 }
1134         }
1135         else
1136                 memcpy(output, input, inputlength * sizeof(short[2]));
1137 }
1138
1139 int S_RawSamples_SampleRate(void)
1140 {
1141         return shm != NULL ? shm->speed : 0;
1142 }