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 <windows.h>
  26 #include <dsound.h>
  27 extern DWORD gSndBufSize;
  28 extern LPDIRECTSOUND pDS;
  29 extern LPDIRECTSOUNDBUFFER pDSBuf;
  30 #endif
  31
  32 #include "ogg.h"
  33
  34
  35 void S_Play(void);
  36 void S_PlayVol(void);
  37 void S_Play2(void);
  38 void S_SoundList(void);
  39 void S_Update_();
  40 void S_StopAllSounds(qboolean clear);
  41 void S_StopAllSoundsC(void);
  42
  43 // =======================================================================
  44 // Internal sound data & structures
  45 // =======================================================================
  46
  47 channel_t channels[MAX_CHANNELS];
  48 int total_channels;
  49
  50 int snd_blocked = 0;
  51 static qboolean snd_ambient = 1;
  52 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
  53
  54 // pointer should go away
  55 volatile dma_t *shm = 0;
  56 volatile dma_t sn;
  57
  58 vec3_t listener_vieworigin;
  59 vec3_t listener_viewforward;
  60 vec3_t listener_viewleft;
  61 vec3_t listener_viewup;
  62 vec_t sound_nominal_clip_dist=1000.0;
  63 mempool_t *snd_mempool;
  64
  65 // sample PAIRS
  66 int soundtime;
  67 int paintedtime;
  68
  69
  70 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  71 #define MAX_SFX 4096
  72 sfx_t *known_sfx; // allocated [MAX_SFX]
  73 int num_sfx;
  74
  75 sfx_t *ambient_sfx[NUM_AMBIENTS];
  76
  77 int sound_started = 0;
  78
  79 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  80 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  81 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  82
  83 cvar_t nosound = {0, "nosound", "0"};
  84 cvar_t snd_precache = {0, "snd_precache", "1"};
  85 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  86 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  87 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  88 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  89 cvar_t snd_show = {0, "snd_show", "0"};
  90 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  91 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  92
  93
  94 // ====================================================================
  95 // User-setable variables
  96 // ====================================================================
  97
  98
  99 //
 100 // Fake dma is a synchronous faking of the DMA progress used for
 101 // isolating performance in the renderer.  The fakedma_updates is
 102 // number of times S_Update() is called per second.
 103 //
 104
 105 qboolean fakedma = false;
 106 int fakedma_updates = 15;
 107
 108
 109 void S_AmbientOff (void)
 110 {
 111         snd_ambient = false;
 112 }
 113
 114
 115 void S_AmbientOn (void)
 116 {
 117         snd_ambient = true;
 118 }
 119
 120
 121 void S_SoundInfo_f(void)
 122 {
 123         if (!sound_started || !shm)
 124         {
 125                 Con_Printf ("sound system not started\n");
 126                 return;
 127         }
 128
 129         Con_Printf("%5d stereo\n", shm->channels - 1);
 130         Con_Printf("%5d samples\n", shm->samples);
 131         Con_Printf("%5d samplepos\n", shm->samplepos);
 132         Con_Printf("%5d samplebits\n", shm->samplebits);
 133         Con_Printf("%5d speed\n", shm->speed);
 134         Con_Printf("0x%x dma buffer\n", shm->buffer);
 135         Con_Printf("%5d total_channels\n", total_channels);
 136 }
 137
 138 void S_UnloadSounds(void)
 139 {
 140         int i;
 141         for (i = 0;i < num_sfx;i++)
 142                 S_UnloadSound(known_sfx + i);
 143 }
 144
 145 void S_LoadSounds(void)
 146 {
 147         int i;
 148         for (i = 0;i < num_sfx;i++)
 149                 S_LoadSound(known_sfx + i, false);
 150 }
 151
 152 void S_Startup(void)
 153 {
 154         if (!snd_initialized.integer)
 155                 return;
 156
 157         shm = &sn;
 158         memset((void *)shm, 0, sizeof(*shm));
 159
 160 // create a piece of DMA memory
 161
 162         if (fakedma)
 163         {
 164                 shm->samplebits = 16;
 165                 shm->speed = 22050;
 166                 shm->channels = 2;
 167                 shm->samples = 32768;
 168                 shm->samplepos = 0;
 169                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
 170         }
 171         else
 172         {
 173                 if (!SNDDMA_Init())
 174                 {
 175                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
 176                         sound_started = 0;
 177                         shm = NULL;
 178                         return;
 179                 }
 180         }
 181
 182         sound_started = 1;
 183
 184         Con_DPrintf("Sound sampling rate: %i\n", shm->speed);
 185
 186         //S_LoadSounds();
 187
 188         S_StopAllSounds(true);
 189 }
 190
 191 void S_Shutdown(void)
 192 {
 193         if (!sound_started)
 194                 return;
 195
 196         //S_UnloadSounds();
 197
 198         if (fakedma)
 199                 Mem_Free(shm->buffer);
 200         else
 201                 SNDDMA_Shutdown();
 202
 203         shm = NULL;
 204         sound_started = 0;
 205 }
 206
 207 void S_Restart_f(void)
 208 {
 209         S_Shutdown();
 210         S_Startup();
 211 }
 212
 213 /*
 214 ================
 215 S_Init
 216 ================
 217 */
 218 void S_Init(void)
 219 {
 220         Con_DPrintf("\nSound Initialization\n");
 221
 222         S_RawSamples_ClearQueue();
 223
 224         Cvar_RegisterVariable(&volume);
 225         Cvar_RegisterVariable(&bgmvolume);
 226         Cvar_RegisterVariable(&snd_staticvolume);
 227
 228         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 229                 return;
 230
 231         snd_mempool = Mem_AllocPool("sound");
 232
 233         if (COM_CheckParm("-simsound"))
 234                 fakedma = true;
 235
 236         Cmd_AddCommand("play", S_Play);
 237         Cmd_AddCommand("play2", S_Play2);
 238         Cmd_AddCommand("playvol", S_PlayVol);
 239         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 240         Cmd_AddCommand("soundlist", S_SoundList);
 241         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 242         Cmd_AddCommand("snd_restart", S_Restart_f);
 243
 244         Cvar_RegisterVariable(&nosound);
 245         Cvar_RegisterVariable(&snd_precache);
 246         Cvar_RegisterVariable(&snd_initialized);
 247         Cvar_RegisterVariable(&bgmbuffer);
 248         Cvar_RegisterVariable(&ambient_level);
 249         Cvar_RegisterVariable(&ambient_fade);
 250         Cvar_RegisterVariable(&snd_noextraupdate);
 251         Cvar_RegisterVariable(&snd_show);
 252         Cvar_RegisterVariable(&_snd_mixahead);
 253         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 254
 255         Cvar_SetValueQuick(&snd_initialized, true);
 256
 257         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 258         num_sfx = 0;
 259
 260         SND_InitScaletable ();
 261
 262         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 263         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 264
 265         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 266         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 267
 268         OGG_OpenLibrary ();
 269 }
 270
 271
 272 // =======================================================================
 273 // Load a sound
 274 // =======================================================================
 275
 276 /*
 277 =========
 278 S_GetCached
 279
 280 =========
 281 */
 282 sfx_t *S_GetCached (const char *name)
 283 {
 284         int i;
 285
 286         if (!snd_initialized.integer)
 287                 return NULL;
 288
 289         if (!name)
 290                 Host_Error("S_IsCached: NULL\n");
 291
 292         if (strlen(name) >= MAX_QPATH)
 293                 Host_Error("Sound name too long: %s", name);
 294
 295         for(i = 0;i < num_sfx;i++)
 296                 if(!strcmp(known_sfx[i].name, name))
 297                         return &known_sfx[i];
 298
 299         return NULL;
 300 }
 301
 302 /*
 303 ==================
 304 S_FindName
 305
 306 ==================
 307 */
 308 sfx_t *S_FindName (char *name)
 309 {
 310         int i;
 311         sfx_t *sfx;
 312
 313         if (!snd_initialized.integer)
 314                 return NULL;
 315
 316         if (!name)
 317                 Host_Error("S_FindName: NULL\n");
 318
 319         if (strlen(name) >= MAX_QPATH)
 320                 Host_Error("Sound name too long: %s", name);
 321
 322 // see if already loaded
 323         for (i = 0;i < num_sfx;i++)
 324                 if (!strcmp(known_sfx[i].name, name))
 325                         return &known_sfx[i];
 326
 327         if (num_sfx == MAX_SFX)
 328                 Sys_Error("S_FindName: out of sfx_t");
 329
 330         sfx = &known_sfx[num_sfx++];
 331         memset(sfx, 0, sizeof(*sfx));
 332         snprintf(sfx->name, sizeof(sfx->name), "%s", name);
 333         return sfx;
 334 }
 335
 336
 337 /*
 338 ==================
 339 S_TouchSound
 340
 341 ==================
 342 */
 343 void S_TouchSound (char *name)
 344 {
 345         sfx_t *sfx;
 346
 347         sfx = S_FindName (name);
 348
 349         // Set the "used" flag for this sound
 350         if (sfx != NULL)
 351                 sfx->flags |= SFXFLAG_USED;
 352 }
 353
 354
 355 /*
 356 ==================
 357 S_ClearUsed
 358
 359 Reset the "used" flag of all precached sounds
 360 ==================
 361 */
 362 void S_ClearUsed (void)
 363 {
 364         int i;
 365
 366         for (i = 0; i < num_sfx; i++)
 367                 known_sfx[i].flags &= ~SFXFLAG_USED;
 368 }
 369
 370
 371 /*
 372 ==================
 373 S_PurgeUnused
 374
 375 Free all precached sounds without the "used" flag
 376 ==================
 377 */
 378 void S_PurgeUnused (void)
 379 {
 380         int i;
 381         sfx_t *sfx;
 382
 383         for (i = 0; i < num_sfx; i++)
 384         {
 385                 sfx = &known_sfx[i];
 386                 if (! (sfx->flags & SFXFLAG_USED))
 387                         S_UnloadSound (sfx);
 388         }
 389 }
 390
 391
 392 /*
 393 ==================
 394 S_PrecacheSound
 395
 396 ==================
 397 */
 398 sfx_t *S_PrecacheSound (char *name, int complain)
 399 {
 400         sfx_t *sfx;
 401
 402         if (!snd_initialized.integer)
 403                 return NULL;
 404
 405         sfx = S_FindName(name);
 406
 407         if (!nosound.integer && snd_precache.integer)
 408                 S_LoadSound(sfx, complain);
 409
 410         return sfx;
 411 }
 412
 413
 414 //=============================================================================
 415
 416 /*
 417 =================
 418 SND_PickChannel
 419 =================
 420 */
 421 channel_t *SND_PickChannel(int entnum, int entchannel)
 422 {
 423         int ch_idx;
 424         int first_to_die;
 425         int life_left;
 426
 427 // Check for replacement sound, or find the best one to replace
 428         first_to_die = -1;
 429         life_left = 0x7fffffff;
 430         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 431         {
 432                 if (entchannel != 0             // channel 0 never overrides
 433                 && channels[ch_idx].entnum == entnum
 434                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 435                 {       // always override sound from same entity
 436                         first_to_die = ch_idx;
 437                         break;
 438                 }
 439
 440                 // don't let monster sounds override player sounds
 441                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 442                         continue;
 443
 444                 if (channels[ch_idx].end - paintedtime < life_left)
 445                 {
 446                         life_left = channels[ch_idx].end - paintedtime;
 447                         first_to_die = ch_idx;
 448                 }
 449         }
 450
 451         if (first_to_die == -1)
 452                 return NULL;
 453
 454         if (channels[first_to_die].sfx)
 455                 channels[first_to_die].sfx = NULL;
 456
 457         return &channels[first_to_die];
 458 }
 459
 460 /*
 461 =================
 462 SND_Spatialize
 463 =================
 464 */
 465 void SND_Spatialize(channel_t *ch, int isstatic)
 466 {
 467         vec_t dist, scale, pan;
 468         vec3_t source_vec;
 469
 470         // anything coming from the view entity will always be full volume
 471         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 472         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 473         {
 474                 ch->leftvol = ch->master_vol;
 475                 ch->rightvol = ch->master_vol;
 476         }
 477         else
 478         {
 479                 // update sound origin if we know about the entity
 480                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 481                 {
 482                         //Con_Printf("-- entnum %i origin %f %f %f neworigin %f %f %f\n", ch->entnum, ch->origin[0], ch->origin[1], ch->origin[2], cl_entities[ch->entnum].state_current.origin[0], cl_entities[ch->entnum].state_current.origin[1], cl_entities[ch->entnum].state_current.origin[2]);
 483                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 484                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 485                                 VectorMAMAM(1.0f, ch->origin, 0.5f, cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->normalmins, 0.5f, cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->normalmaxs, ch->origin);
 486                 }
 487
 488                 // calculate stereo seperation and distance attenuation
 489                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 490                 dist = VectorNormalizeLength(source_vec);
 491                 // distance
 492                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 493                 // panning
 494                 pan = scale * DotProduct(listener_viewleft, source_vec);
 495                 // calculate the volumes
 496                 ch->leftvol = (int) (scale + pan);
 497                 ch->rightvol = (int) (scale - pan);
 498         }
 499
 500         // LordHavoc: allow adjusting volume of static sounds
 501         if (isstatic)
 502         {
 503                 ch->leftvol *= snd_staticvolume.value;
 504                 ch->rightvol *= snd_staticvolume.value;
 505         }
 506
 507         // clamp volumes
 508         ch->leftvol = bound(0, ch->leftvol, 255);
 509         ch->rightvol = bound(0, ch->rightvol, 255);
 510 }
 511
 512
 513 // =======================================================================
 514 // Start a sound effect
 515 // =======================================================================
 516
 517 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 518 {
 519         channel_t *target_chan, *check;
 520         sfxcache_t      *sc;
 521         int             vol;
 522         int             ch_idx;
 523         int             skip;
 524
 525         if (!sound_started || !sfx || !sfx->sfxcache || nosound.integer)
 526                 return;
 527
 528         vol = fvol*255;
 529
 530 // pick a channel to play on
 531         target_chan = SND_PickChannel(entnum, entchannel);
 532         if (!target_chan)
 533                 return;
 534
 535 // spatialize
 536         memset (target_chan, 0, sizeof(*target_chan));
 537         VectorCopy(origin, target_chan->origin);
 538         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 539         target_chan->master_vol = vol;
 540         target_chan->entnum = entnum;
 541         target_chan->entchannel = entchannel;
 542         SND_Spatialize(target_chan, false);
 543
 544         // LordHavoc: spawn the sound anyway because the player might teleport to it
 545         //if (!target_chan->leftvol && !target_chan->rightvol)
 546         //      return;         // not audible at all
 547
 548 // new channel
 549         sc = S_LoadSound (sfx, true);
 550         if (!sc)
 551         {
 552                 target_chan->sfx = NULL;
 553                 return;         // couldn't load the sound's data
 554         }
 555
 556         target_chan->sfx = sfx;
 557         target_chan->pos = 0.0;
 558         target_chan->end = paintedtime + sc->length;
 559
 560 // if an identical sound has also been started this frame, offset the pos
 561 // a bit to keep it from just making the first one louder
 562         check = &channels[NUM_AMBIENTS];
 563         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 564         {
 565                 if (check == target_chan)
 566                         continue;
 567                 if (check->sfx == sfx && !check->pos)
 568                 {
 569                         // LordHavoc: fixed skip calculations
 570                         skip = 0.1 * sc->speed;
 571                         if (skip > sc->length)
 572                                 skip = sc->length;
 573                         if (skip > 0)
 574                                 skip = rand() % skip;
 575                         target_chan->pos += skip;
 576                         target_chan->end -= skip;
 577                         break;
 578                 }
 579         }
 580 }
 581
 582 void S_StopSound(int entnum, int entchannel)
 583 {
 584         int i;
 585
 586         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 587         {
 588                 if (channels[i].entnum == entnum
 589                         && channels[i].entchannel == entchannel)
 590                 {
 591                         channels[i].end = 0;
 592                         channels[i].sfx = NULL;
 593                         return;
 594                 }
 595         }
 596 }
 597
 598 void S_StopAllSounds(qboolean clear)
 599 {
 600         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 601         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 602
 603         if (clear)
 604                 S_ClearBuffer();
 605 }
 606
 607 void S_StopAllSoundsC(void)
 608 {
 609         S_StopAllSounds(true);
 610 }
 611
 612 void S_ClearBuffer(void)
 613 {
 614         int             clear;
 615
 616         if (!sound_started || !shm)
 617                 return;
 618
 619         if (shm->samplebits == 8)
 620                 clear = 0x80;
 621         else
 622                 clear = 0;
 623
 624 #ifdef _WIN32
 625         if (pDSBuf)
 626         {
 627                 DWORD   dwSize;
 628                 DWORD   *pData;
 629                 int             reps;
 630                 HRESULT hresult;
 631
 632                 reps = 0;
 633
 634                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 635                 {
 636                         if (hresult != DSERR_BUFFERLOST)
 637                         {
 638                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 639                                 S_Shutdown ();
 640                                 return;
 641                         }
 642
 643                         if (++reps > 10000)
 644                         {
 645                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 646                                 S_Shutdown ();
 647                                 return;
 648                         }
 649                 }
 650
 651                 memset(pData, clear, shm->samples * shm->samplebits/8);
 652
 653                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 654
 655         }
 656         else
 657 #endif
 658         if (shm->buffer)
 659         {
 660                 int             setsize = shm->samples * shm->samplebits / 8;
 661                 char    *buf = shm->buffer;
 662
 663                 while (setsize--)
 664                         *buf++ = clear;
 665
 666 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 667 // reads the memory area before writing to it causing a seg fault
 668 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 669 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 670         }
 671 }
 672
 673
 674 /*
 675 =================
 676 S_StaticSound
 677 =================
 678 */
 679 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 680 {
 681         channel_t       *ss;
 682         sfxcache_t              *sc;
 683
 684         if (!sfx)
 685                 return;
 686
 687         if (total_channels == MAX_CHANNELS)
 688         {
 689                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 690                 return;
 691         }
 692
 693         sc = S_LoadSound (sfx, true);
 694         if (!sc)
 695                 return;
 696
 697         if (sc->loopstart == -1)
 698                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 699
 700         ss = &channels[total_channels++];
 701         memset(ss, 0, sizeof(*ss));
 702         ss->forceloop = true;
 703         ss->sfx = sfx;
 704         VectorCopy (origin, ss->origin);
 705         ss->master_vol = vol;
 706         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 707         ss->end = paintedtime + sc->length;
 708
 709         SND_Spatialize (ss, true);
 710 }
 711
 712
 713 //=============================================================================
 714
 715 /*
 716 ===================
 717 S_UpdateAmbientSounds
 718 ===================
 719 */
 720 void S_UpdateAmbientSounds (void)
 721 {
 722         float           vol;
 723         int                     ambient_channel;
 724         channel_t       *chan;
 725         qbyte           ambientlevels[NUM_AMBIENTS];
 726
 727         // LordHavoc: kill ambient sounds until proven otherwise
 728         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 729                 channels[ambient_channel].sfx = NULL;
 730
 731         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 732                 return;
 733
 734         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 735
 736 // calc ambient sound levels
 737         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 738         {
 739                 if (ambient_sfx[ambient_channel] &&
 740                         (ambient_sfx[ambient_channel]->flags & SFXFLAG_SILENTLYMISSING))
 741                         continue;
 742                 chan = &channels[ambient_channel];
 743                 chan->forceloop = true;
 744                 chan->sfx = ambient_sfx[ambient_channel];
 745
 746                 vol = ambient_level.value * ambientlevels[ambient_channel];
 747                 if (vol < 8)
 748                         vol = 0;
 749
 750         // don't adjust volume too fast
 751                 if (chan->master_vol < vol)
 752                 {
 753                         chan->master_vol += host_realframetime * ambient_fade.value;
 754                         if (chan->master_vol > vol)
 755                                 chan->master_vol = vol;
 756                 }
 757                 else if (chan->master_vol > vol)
 758                 {
 759                         chan->master_vol -= host_realframetime * ambient_fade.value;
 760                         if (chan->master_vol < vol)
 761                                 chan->master_vol = vol;
 762                 }
 763
 764                 chan->leftvol = chan->rightvol = chan->master_vol;
 765         }
 766 }
 767
 768
 769 /*
 770 ============
 771 S_Update
 772
 773 Called once each time through the main loop
 774 ============
 775 */
 776 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 777 {
 778         int                     i, j;
 779         int                     total;
 780         channel_t       *ch;
 781         channel_t       *combine;
 782
 783         if (!snd_initialized.integer || (snd_blocked > 0))
 784                 return;
 785
 786         VectorCopy(origin, listener_vieworigin);
 787         VectorCopy(forward, listener_viewforward);
 788         VectorCopy(left, listener_viewleft);
 789         VectorCopy(up, listener_viewup);
 790
 791 // update general area ambient sound sources
 792         S_UpdateAmbientSounds ();
 793
 794         combine = NULL;
 795
 796 // update spatialization for static and dynamic sounds
 797         ch = channels+NUM_AMBIENTS;
 798         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 799         {
 800                 if (!ch->sfx)
 801                         continue;
 802                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 803                 if (!ch->leftvol && !ch->rightvol)
 804                         continue;
 805
 806         // try to combine static sounds with a previous channel of the same
 807         // sound effect so we don't mix five torches every frame
 808
 809                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 810                 {
 811                 // see if it can just use the last one
 812                         if (combine && combine->sfx == ch->sfx)
 813                         {
 814                                 combine->leftvol += ch->leftvol;
 815                                 combine->rightvol += ch->rightvol;
 816                                 ch->leftvol = ch->rightvol = 0;
 817                                 continue;
 818                         }
 819                 // search for one
 820                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 821                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 822                                 if (combine->sfx == ch->sfx)
 823                                         break;
 824
 825                         if (j == total_channels)
 826                                 combine = NULL;
 827                         else
 828                         {
 829                                 if (combine != ch)
 830                                 {
 831                                         combine->leftvol += ch->leftvol;
 832                                         combine->rightvol += ch->rightvol;
 833                                         ch->leftvol = ch->rightvol = 0;
 834                                 }
 835                                 continue;
 836                         }
 837                 }
 838         }
 839
 840 //
 841 // debugging output
 842 //
 843         if (snd_show.integer)
 844         {
 845                 total = 0;
 846                 ch = channels;
 847                 for (i=0 ; i<total_channels; i++, ch++)
 848                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 849                                 total++;
 850
 851                 Con_Printf ("----(%i)----\n", total);
 852         }
 853
 854 // mix some sound
 855         S_Update_();
 856 }
 857
 858 void GetSoundtime(void)
 859 {
 860         int             samplepos;
 861         static  int             buffers;
 862         static  int             oldsamplepos;
 863         int             fullsamples;
 864
 865         fullsamples = shm->samples / shm->channels;
 866
 867 // it is possible to miscount buffers if it has wrapped twice between
 868 // calls to S_Update.  Oh well.
 869         samplepos = SNDDMA_GetDMAPos();
 870
 871         if (samplepos < oldsamplepos)
 872         {
 873                 buffers++;                                      // buffer wrapped
 874
 875                 if (paintedtime > 0x40000000)
 876                 {       // time to chop things off to avoid 32 bit limits
 877                         buffers = 0;
 878                         paintedtime = fullsamples;
 879                         S_StopAllSounds (true);
 880                 }
 881         }
 882         oldsamplepos = samplepos;
 883
 884         soundtime = buffers*fullsamples + samplepos/shm->channels;
 885 }
 886
 887 void IN_Accumulate (void);
 888
 889 void S_ExtraUpdate (void)
 890 {
 891
 892 #ifdef _WIN32
 893         IN_Accumulate ();
 894 #endif
 895
 896         if (snd_noextraupdate.integer)
 897                 return;         // don't pollute timings
 898         S_Update_();
 899 }
 900
 901 void S_Update_(void)
 902 {
 903         unsigned        endtime;
 904         int                             samps;
 905
 906         if (!sound_started || (snd_blocked > 0))
 907                 return;
 908
 909 // Updates DMA time
 910         GetSoundtime();
 911
 912 // check to make sure that we haven't overshot
 913         if (paintedtime < soundtime)
 914                 paintedtime = soundtime;
 915
 916 // mix ahead of current position
 917         endtime = soundtime + _snd_mixahead.value * shm->speed;
 918         samps = shm->samples >> (shm->channels-1);
 919         if (endtime > (unsigned int)(soundtime + samps))
 920                 endtime = soundtime + samps;
 921
 922 #ifdef _WIN32
 923 // if the buffer was lost or stopped, restore it and/or restart it
 924         {
 925                 DWORD   dwStatus;
 926
 927                 if (pDSBuf)
 928                 {
 929                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
 930                                 Con_Printf ("Couldn't get sound buffer status\n");
 931
 932                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 933                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 934
 935                         if (!(dwStatus & DSBSTATUS_PLAYING))
 936                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 937                 }
 938         }
 939 #endif
 940
 941         S_PaintChannels (endtime);
 942
 943         SNDDMA_Submit ();
 944 }
 945
 946 /*
 947 ===============================================================================
 948
 949 console functions
 950
 951 ===============================================================================
 952 */
 953
 954 static void S_Play_Common(float fvol, float attenuation)
 955 {
 956         int     i;
 957         char name[256];
 958         sfx_t   *sfx;
 959
 960         i = 1;
 961         while (i<Cmd_Argc())
 962         {
 963                 if (!strrchr(Cmd_Argv(i), '.'))
 964                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
 965                 else
 966                         strlcpy(name, Cmd_Argv(i), sizeof(name));
 967                 sfx = S_PrecacheSound(name, true);
 968
 969                 // If we need to get the volume from the command line
 970                 if (fvol == -1.0f)
 971                 {
 972                         fvol = atof(Cmd_Argv(i+1));
 973                         i += 2;
 974                 }
 975                 else
 976                         i++;
 977
 978                 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
 979         }
 980 }
 981
 982 void S_Play(void)
 983 {
 984         S_Play_Common (1.0f, 1.0f);
 985 }
 986
 987 void S_Play2(void)
 988 {
 989         S_Play_Common (1.0f, 0.0f);
 990 }
 991
 992 void S_PlayVol(void)
 993 {
 994         S_Play_Common (-1.0f, 0.0f);
 995 }
 996
 997 void S_SoundList(void)
 998 {
 999         int             i;
1000         sfx_t   *sfx;
1001         sfxcache_t      *sc;
1002         int             size, total;
1003
1004         total = 0;
1005         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
1006         {
1007                 sc = sfx->sfxcache;
1008                 if (sc)
1009                 {
1010                         size = sc->length*sc->width*(sc->stereo+1);
1011                         total += size;
1012                         Con_Printf("%c(%2db) %6i : %s\n", sc->loopstart >= 0 ? 'L' : ' ',sc->width*8,  size, sfx->name);
1013                 }
1014         }
1015         Con_Printf("Total resident: %i\n", total);
1016 }
1017
1018
1019 void S_LocalSound (char *sound)
1020 {
1021         sfx_t   *sfx;
1022
1023         if (!snd_initialized.integer || nosound.integer)
1024                 return;
1025
1026         sfx = S_PrecacheSound (sound, true);
1027         if (!sfx)
1028         {
1029                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1030                 return;
1031         }
1032         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1033 }
1034
1035
1036 #define RAWSAMPLESBUFFER 32768
1037 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1038 int s_rawsamplesbuffer_start;
1039 int s_rawsamplesbuffer_count;
1040
1041 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1042 {
1043         int b2, b3;
1044         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1045         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1046                 return;
1047         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1048         if (b2 + length > RAWSAMPLESBUFFER)
1049         {
1050                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1051                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1052                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1053         }
1054         else
1055                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1056         s_rawsamplesbuffer_count += length;
1057 }
1058
1059 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1060 {
1061         int b1, b2, l;
1062         int i;
1063         short *in;
1064         int *out;
1065         int count;
1066         l = length;
1067         if (l > s_rawsamplesbuffer_count)
1068                 l = s_rawsamplesbuffer_count;
1069         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1070         if (b1 + l > RAWSAMPLESBUFFER)
1071         {
1072                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1073                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1074                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1075                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1076                         out[i] = in[i];
1077                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1078                         out[i] = in[i];
1079                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1080         }
1081         else
1082         {
1083                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1084                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1085                         out[i] = in[i];
1086                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1087         }
1088         if (l < (int)length)
1089         {
1090                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1091                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1092         }
1093         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1094         s_rawsamplesbuffer_count -= l;
1095 }
1096
1097 void S_RawSamples_ClearQueue(void)
1098 {
1099         s_rawsamplesbuffer_count = 0;
1100         s_rawsamplesbuffer_start = 0;
1101 }
1102
1103 int S_RawSamples_QueueWantsMore(void)
1104 {
1105         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1106                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1107         else
1108                 return 0;
1109 }
1110
1111 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1112 {
1113         if (inputlength != outputlength)
1114         {
1115                 int i, position, stopposition, step;
1116                 short *in, *out;
1117                 step = (float) inputlength * 256.0f / (float) outputlength;
1118                 position = 0;
1119                 stopposition = (inputlength - 1) << 8;
1120                 out = output;
1121                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1122                 {
1123                         in = input + ((position >> 8) << 1);
1124                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1125                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1126                         out += 2;
1127                 }
1128                 stopposition = inputlength << 8;
1129                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1130                 {
1131                         in = input + ((position >> 8) << 1);
1132                         out[0] = in[0];
1133                         out[1] = in[2];
1134                         out += 2;
1135                 }
1136         }
1137         else
1138                 memcpy(output, input, inputlength * sizeof(short[2]));
1139 }
1140
1141 int S_RawSamples_SampleRate(void)
1142 {
1143         return shm != NULL ? shm->speed : 0;
1144 }
1145