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 "snd_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 unsigned 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 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1"};
  54
  55 // pointer should go away
  56 volatile dma_t *shm = 0;
  57 volatile dma_t sn;
  58
  59 vec3_t listener_vieworigin;
  60 vec3_t listener_viewforward;
  61 vec3_t listener_viewleft;
  62 vec3_t listener_viewup;
  63 vec_t sound_nominal_clip_dist=1000.0;
  64 mempool_t *snd_mempool;
  65
  66 // sample PAIRS
  67 int soundtime;
  68 int paintedtime;
  69
  70
  71 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  72 #define MAX_SFX 4096
  73 sfx_t *known_sfx; // allocated [MAX_SFX]
  74 int num_sfx;
  75
  76 sfx_t *ambient_sfx[NUM_AMBIENTS];
  77
  78 int sound_started = 0;
  79
  80 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  81 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  82 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  83
  84 cvar_t nosound = {0, "nosound", "0"};
  85 cvar_t snd_precache = {0, "snd_precache", "1"};
  86 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  87 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  88 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  89 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  90 cvar_t snd_show = {0, "snd_show", "0"};
  91 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  92 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  93
  94
  95 // ====================================================================
  96 // User-setable variables
  97 // ====================================================================
  98
  99
 100 //
 101 // Fake dma is a synchronous faking of the DMA progress used for
 102 // isolating performance in the renderer.  The fakedma_updates is
 103 // number of times S_Update() is called per second.
 104 //
 105
 106 qboolean fakedma = false;
 107 int fakedma_updates = 15;
 108
 109
 110 void S_AmbientOff (void)
 111 {
 112         snd_ambient = false;
 113 }
 114
 115
 116 void S_AmbientOn (void)
 117 {
 118         snd_ambient = true;
 119 }
 120
 121
 122 void S_SoundInfo_f(void)
 123 {
 124         if (!sound_started || !shm)
 125         {
 126                 Con_Print("sound system not started\n");
 127                 return;
 128         }
 129
 130         Con_Printf("%5d stereo\n", shm->format.channels - 1);
 131         Con_Printf("%5d samples\n", shm->samples);
 132         Con_Printf("%5d samplepos\n", shm->samplepos);
 133         Con_Printf("%5d samplebits\n", shm->format.width * 8);
 134         Con_Printf("%5d speed\n", shm->format.speed);
 135         Con_Printf("0x%x dma buffer\n", shm->buffer);
 136         Con_Printf("%5u total_channels\n", total_channels);
 137 }
 138
 139 void S_UnloadSounds(void)
 140 {
 141         int i;
 142         for (i = 0;i < num_sfx;i++)
 143                 S_UnloadSound(known_sfx + i);
 144 }
 145
 146 void S_LoadSounds(void)
 147 {
 148         int i;
 149         for (i = 0;i < num_sfx;i++)
 150                 S_LoadSound(known_sfx + i, false);
 151 }
 152
 153 void S_Startup(void)
 154 {
 155         if (!snd_initialized.integer)
 156                 return;
 157
 158         shm = &sn;
 159         memset((void *)shm, 0, sizeof(*shm));
 160
 161 // create a piece of DMA memory
 162
 163         if (fakedma)
 164         {
 165                 shm->format.width = 2;
 166                 shm->format.speed = 22050;
 167                 shm->format.channels = 2;
 168                 shm->samples = 32768;
 169                 shm->samplepos = 0;
 170                 shm->buffer = Mem_Alloc(snd_mempool, shm->format.channels * shm->samples * shm->format.width);
 171         }
 172         else
 173         {
 174                 if (!SNDDMA_Init())
 175                 {
 176                         Con_Print("S_Startup: SNDDMA_Init failed.\n");
 177                         sound_started = 0;
 178                         shm = NULL;
 179                         return;
 180                 }
 181         }
 182
 183         sound_started = 1;
 184
 185         Con_DPrintf("Sound sampling rate: %i\n", shm->format.speed);
 186
 187         //S_LoadSounds();
 188
 189         S_StopAllSounds(true);
 190 }
 191
 192 void S_Shutdown(void)
 193 {
 194         if (!sound_started)
 195                 return;
 196
 197         //S_UnloadSounds();
 198
 199         if (fakedma)
 200                 Mem_Free(shm->buffer);
 201         else
 202                 SNDDMA_Shutdown();
 203
 204         shm = NULL;
 205         sound_started = 0;
 206 }
 207
 208 void S_Restart_f(void)
 209 {
 210         S_Shutdown();
 211         S_Startup();
 212 }
 213
 214 /*
 215 ================
 216 S_Init
 217 ================
 218 */
 219 void S_Init(void)
 220 {
 221         Con_DPrint("\nSound Initialization\n");
 222
 223         S_RawSamples_ClearQueue();
 224
 225         Cvar_RegisterVariable(&volume);
 226         Cvar_RegisterVariable(&bgmvolume);
 227         Cvar_RegisterVariable(&snd_staticvolume);
 228
 229         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 230                 return;
 231
 232         snd_mempool = Mem_AllocPool("sound");
 233
 234         if (COM_CheckParm("-simsound"))
 235                 fakedma = true;
 236
 237         Cmd_AddCommand("play", S_Play);
 238         Cmd_AddCommand("play2", S_Play2);
 239         Cmd_AddCommand("playvol", S_PlayVol);
 240         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 241         Cmd_AddCommand("soundlist", S_SoundList);
 242         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 243         Cmd_AddCommand("snd_restart", S_Restart_f);
 244
 245         Cvar_RegisterVariable(&nosound);
 246         Cvar_RegisterVariable(&snd_precache);
 247         Cvar_RegisterVariable(&snd_initialized);
 248         Cvar_RegisterVariable(&snd_streaming);
 249         Cvar_RegisterVariable(&bgmbuffer);
 250         Cvar_RegisterVariable(&ambient_level);
 251         Cvar_RegisterVariable(&ambient_fade);
 252         Cvar_RegisterVariable(&snd_noextraupdate);
 253         Cvar_RegisterVariable(&snd_show);
 254         Cvar_RegisterVariable(&_snd_mixahead);
 255         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 256
 257         Cvar_SetValueQuick(&snd_initialized, true);
 258
 259         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 260         num_sfx = 0;
 261
 262         SND_InitScaletable ();
 263
 264         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 265         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 266
 267         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 268         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 269
 270         OGG_OpenLibrary ();
 271 }
 272
 273
 274 // =======================================================================
 275 // Load a sound
 276 // =======================================================================
 277
 278 /*
 279 =========
 280 S_GetCached
 281
 282 =========
 283 */
 284 sfx_t *S_GetCached (const char *name)
 285 {
 286         int i;
 287
 288         if (!snd_initialized.integer)
 289                 return NULL;
 290
 291         if (!name)
 292                 Host_Error("S_IsCached: NULL\n");
 293
 294         if (strlen(name) >= MAX_QPATH)
 295                 Host_Error("Sound name too long: %s", name);
 296
 297         for(i = 0;i < num_sfx;i++)
 298                 if(!strcmp(known_sfx[i].name, name))
 299                         return &known_sfx[i];
 300
 301         return NULL;
 302 }
 303
 304 /*
 305 ==================
 306 S_FindName
 307
 308 ==================
 309 */
 310 sfx_t *S_FindName (char *name)
 311 {
 312         int i;
 313         sfx_t *sfx;
 314
 315         if (!snd_initialized.integer)
 316                 return NULL;
 317
 318         if (!name)
 319                 Host_Error("S_FindName: NULL\n");
 320
 321         if (strlen(name) >= MAX_QPATH)
 322                 Host_Error("Sound name too long: %s", name);
 323
 324 // see if already loaded
 325         for (i = 0;i < num_sfx;i++)
 326                 if (!strcmp(known_sfx[i].name, name))
 327                         return &known_sfx[i];
 328
 329         if (num_sfx == MAX_SFX)
 330                 Sys_Error("S_FindName: out of sfx_t");
 331
 332         sfx = &known_sfx[num_sfx++];
 333         memset(sfx, 0, sizeof(*sfx));
 334         strncpy(sfx->name, name, sizeof(sfx->name));
 335         return sfx;
 336 }
 337
 338
 339 /*
 340 ==================
 341 S_TouchSound
 342
 343 ==================
 344 */
 345 void S_TouchSound (char *name)
 346 {
 347         sfx_t *sfx;
 348
 349         sfx = S_FindName (name);
 350
 351         // Set the "used" flag for this sound
 352         if (sfx != NULL)
 353                 sfx->flags |= SFXFLAG_USED;
 354 }
 355
 356
 357 /*
 358 ==================
 359 S_ClearUsed
 360
 361 Reset the "used" flag of all precached sounds
 362 ==================
 363 */
 364 void S_ClearUsed (void)
 365 {
 366         int i;
 367
 368         for (i = 0; i < num_sfx; i++)
 369                 known_sfx[i].flags &= ~SFXFLAG_USED;
 370 }
 371
 372
 373 /*
 374 ==================
 375 S_PurgeUnused
 376
 377 Free all precached sounds without the "used" flag
 378 ==================
 379 */
 380 void S_PurgeUnused (void)
 381 {
 382         int i;
 383         sfx_t *sfx;
 384
 385         for (i = 0; i < num_sfx; i++)
 386         {
 387                 sfx = &known_sfx[i];
 388                 if (! (sfx->flags & SFXFLAG_USED))
 389                         S_UnloadSound (sfx);
 390         }
 391 }
 392
 393
 394 /*
 395 ==================
 396 S_PrecacheSound
 397
 398 ==================
 399 */
 400 sfx_t *S_PrecacheSound (char *name, int complain)
 401 {
 402         sfx_t *sfx;
 403
 404         if (!snd_initialized.integer)
 405                 return NULL;
 406
 407         sfx = S_FindName(name);
 408
 409         if (!nosound.integer && snd_precache.integer)
 410                 S_LoadSound(sfx, complain);
 411
 412         return sfx;
 413 }
 414
 415
 416 //=============================================================================
 417
 418 /*
 419 =================
 420 SND_PickChannel
 421 =================
 422 */
 423 channel_t *SND_PickChannel(int entnum, int entchannel)
 424 {
 425         int ch_idx;
 426         int first_to_die;
 427         int life_left;
 428         channel_t* ch;
 429
 430 // Check for replacement sound, or find the best one to replace
 431         first_to_die = -1;
 432         life_left = 0x7fffffff;
 433         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 434         {
 435                 ch = &channels[ch_idx];
 436                 if (entchannel != 0             // channel 0 never overrides
 437                 && ch->entnum == entnum
 438                 && (ch->entchannel == entchannel || entchannel == -1) )
 439                 {       // always override sound from same entity
 440                         first_to_die = ch_idx;
 441                         break;
 442                 }
 443
 444                 // don't let monster sounds override player sounds
 445                 if (ch->entnum == cl.viewentity && entnum != cl.viewentity && ch->sfx)
 446                         continue;
 447
 448                 // don't override looped sounds
 449                 if (ch->forceloop || (ch->sfx != NULL && ch->sfx->loopstart >= 0))
 450                         continue;
 451
 452                 if (ch->end - paintedtime < life_left)
 453                 {
 454                         life_left = ch->end - paintedtime;
 455                         first_to_die = ch_idx;
 456                 }
 457         }
 458
 459         if (first_to_die == -1)
 460                 return NULL;
 461
 462         if (channels[first_to_die].sfx)
 463                 channels[first_to_die].sfx = NULL;
 464
 465         return &channels[first_to_die];
 466 }
 467
 468 /*
 469 =================
 470 SND_Spatialize
 471 =================
 472 */
 473 void SND_Spatialize(channel_t *ch, int isstatic)
 474 {
 475         vec_t dist, scale, pan;
 476         vec3_t source_vec;
 477
 478         // anything coming from the view entity will always be full volume
 479         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 480         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 481         {
 482                 ch->leftvol = ch->master_vol;
 483                 ch->rightvol = ch->master_vol;
 484         }
 485         else
 486         {
 487                 // update sound origin if we know about the entity
 488                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 489                 {
 490                         //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]);
 491                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 492                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 493                                 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);
 494                 }
 495
 496                 // calculate stereo seperation and distance attenuation
 497                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 498                 dist = VectorNormalizeLength(source_vec);
 499                 // distance
 500                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 501                 // panning
 502                 pan = scale * DotProduct(listener_viewleft, source_vec);
 503                 // calculate the volumes
 504                 ch->leftvol = (int) (scale + pan);
 505                 ch->rightvol = (int) (scale - pan);
 506         }
 507
 508         // LordHavoc: allow adjusting volume of static sounds
 509         if (isstatic)
 510         {
 511                 ch->leftvol *= snd_staticvolume.value;
 512                 ch->rightvol *= snd_staticvolume.value;
 513         }
 514
 515         // clamp volumes
 516         ch->leftvol = bound(0, ch->leftvol, 255);
 517         ch->rightvol = bound(0, ch->rightvol, 255);
 518 }
 519
 520
 521 // =======================================================================
 522 // Start a sound effect
 523 // =======================================================================
 524
 525 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 526 {
 527         channel_t *target_chan, *check;
 528         int             vol;
 529         int             ch_idx;
 530         size_t  skip;
 531
 532         if (!sound_started || !sfx || !sfx->fetcher || nosound.integer)
 533                 return;
 534
 535         vol = fvol*255;
 536
 537 // pick a channel to play on
 538         target_chan = SND_PickChannel(entnum, entchannel);
 539         if (!target_chan)
 540                 return;
 541
 542 // spatialize
 543         memset (target_chan, 0, sizeof(*target_chan));
 544         VectorCopy(origin, target_chan->origin);
 545         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 546         target_chan->master_vol = vol;
 547         target_chan->entnum = entnum;
 548         target_chan->entchannel = entchannel;
 549         SND_Spatialize(target_chan, false);
 550
 551         // LordHavoc: spawn the sound anyway because the player might teleport to it
 552         //if (!target_chan->leftvol && !target_chan->rightvol)
 553         //      return;         // not audible at all
 554
 555         // new channel
 556         if (!S_LoadSound (sfx, true))
 557         {
 558                 target_chan->sfx = NULL;
 559                 return;         // couldn't load the sound's data
 560         }
 561
 562         target_chan->sfx = sfx;
 563         target_chan->pos = 0.0;
 564         target_chan->end = paintedtime + sfx->total_length;
 565         target_chan->lastptime = paintedtime;
 566
 567 // if an identical sound has also been started this frame, offset the pos
 568 // a bit to keep it from just making the first one louder
 569         check = &channels[NUM_AMBIENTS];
 570         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 571         {
 572                 if (check == target_chan)
 573                         continue;
 574                 if (check->sfx == sfx && !check->pos)
 575                 {
 576                         // LordHavoc: fixed skip calculations
 577                         skip = 0.1 * sfx->format.speed;
 578                         if (skip > sfx->total_length)
 579                                 skip = sfx->total_length;
 580                         if (skip > 0)
 581                                 skip = rand() % skip;
 582                         target_chan->pos += skip;
 583                         target_chan->end -= skip;
 584                         break;
 585                 }
 586         }
 587 }
 588
 589 void S_StopSound(int entnum, int entchannel)
 590 {
 591         int i;
 592
 593         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 594         {
 595                 if (channels[i].entnum == entnum
 596                         && channels[i].entchannel == entchannel)
 597                 {
 598                         channels[i].end = 0;
 599                         channels[i].sfx = NULL;
 600                         return;
 601                 }
 602         }
 603 }
 604
 605 void S_StopAllSounds(qboolean clear)
 606 {
 607         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 608         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 609
 610         if (clear)
 611                 S_ClearBuffer();
 612 }
 613
 614 void S_StopAllSoundsC(void)
 615 {
 616         S_StopAllSounds(true);
 617 }
 618
 619 void S_ClearBuffer(void)
 620 {
 621         int             clear;
 622
 623         if (!sound_started || !shm)
 624                 return;
 625
 626         if (shm->format.width == 1)
 627                 clear = 0x80;
 628         else
 629                 clear = 0;
 630
 631 #ifdef _WIN32
 632         if (pDSBuf)
 633         {
 634                 DWORD   dwSize;
 635                 DWORD   *pData;
 636                 int             reps;
 637                 HRESULT hresult;
 638
 639                 reps = 0;
 640
 641                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 642                 {
 643                         if (hresult != DSERR_BUFFERLOST)
 644                         {
 645                                 Con_Print("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 646                                 S_Shutdown ();
 647                                 return;
 648                         }
 649
 650                         if (++reps > 10000)
 651                         {
 652                                 Con_Print("S_ClearBuffer: DS: couldn't restore buffer\n");
 653                                 S_Shutdown ();
 654                                 return;
 655                         }
 656                 }
 657
 658                 memset(pData, clear, shm->samples * shm->format.width);
 659
 660                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 661
 662         }
 663         else
 664 #endif
 665         if (shm->buffer)
 666         {
 667                 int             setsize = shm->samples * shm->format.width;
 668                 char    *buf = shm->buffer;
 669
 670                 while (setsize--)
 671                         *buf++ = clear;
 672
 673 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 674 // reads the memory area before writing to it causing a seg fault
 675 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 676 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 677         }
 678 }
 679
 680
 681 /*
 682 =================
 683 S_StaticSound
 684 =================
 685 */
 686 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 687 {
 688         channel_t       *ss;
 689
 690         if (!sfx)
 691                 return;
 692
 693         if (total_channels == MAX_CHANNELS)
 694         {
 695                 Con_Print("total_channels == MAX_CHANNELS\n");
 696                 return;
 697         }
 698
 699         if (!S_LoadSound (sfx, true))
 700                 return;
 701
 702         if (sfx->loopstart == -1)
 703                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 704
 705         ss = &channels[total_channels++];
 706         memset(ss, 0, sizeof(*ss));
 707         ss->forceloop = true;
 708         ss->sfx = sfx;
 709         VectorCopy (origin, ss->origin);
 710         ss->master_vol = vol;
 711         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 712         ss->end = paintedtime + sfx->total_length;
 713         ss->lastptime = paintedtime;
 714
 715         SND_Spatialize (ss, true);
 716 }
 717
 718
 719 //=============================================================================
 720
 721 /*
 722 ===================
 723 S_UpdateAmbientSounds
 724 ===================
 725 */
 726 void S_UpdateAmbientSounds (void)
 727 {
 728         float           vol;
 729         int                     ambient_channel;
 730         channel_t       *chan;
 731         qbyte           ambientlevels[NUM_AMBIENTS];
 732
 733         // LordHavoc: kill ambient sounds until proven otherwise
 734         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 735                 channels[ambient_channel].sfx = NULL;
 736
 737         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 738                 return;
 739
 740         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 741
 742 // calc ambient sound levels
 743         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 744         {
 745                 if (ambient_sfx[ambient_channel] &&
 746                         (ambient_sfx[ambient_channel]->flags & SFXFLAG_SILENTLYMISSING))
 747                         continue;
 748                 chan = &channels[ambient_channel];
 749                 chan->forceloop = true;
 750                 chan->sfx = ambient_sfx[ambient_channel];
 751
 752                 vol = ambient_level.value * ambientlevels[ambient_channel];
 753                 if (vol < 8)
 754                         vol = 0;
 755
 756         // don't adjust volume too fast
 757                 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                 else if (chan->master_vol > vol)
 764                 {
 765                         chan->master_vol -= host_realframetime * ambient_fade.value;
 766                         if (chan->master_vol < vol)
 767                                 chan->master_vol = vol;
 768                 }
 769
 770                 chan->leftvol = chan->rightvol = chan->master_vol;
 771         }
 772 }
 773
 774
 775 /*
 776 ============
 777 S_Update
 778
 779 Called once each time through the main loop
 780 ============
 781 */
 782 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 783 {
 784         unsigned int i, j, total;
 785         channel_t *ch, *combine;
 786
 787         if (!snd_initialized.integer || (snd_blocked > 0))
 788                 return;
 789
 790         VectorCopy(origin, listener_vieworigin);
 791         VectorCopy(forward, listener_viewforward);
 792         VectorCopy(left, listener_viewleft);
 793         VectorCopy(up, listener_viewup);
 794
 795 // update general area ambient sound sources
 796         S_UpdateAmbientSounds ();
 797
 798         combine = NULL;
 799
 800 // update spatialization for static and dynamic sounds
 801         ch = channels+NUM_AMBIENTS;
 802         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 803         {
 804                 if (!ch->sfx)
 805                         continue;
 806                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 807                 if (!ch->leftvol && !ch->rightvol)
 808                         continue;
 809
 810         // try to combine static sounds with a previous channel of the same
 811         // sound effect so we don't mix five torches every frame
 812
 813                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 814                 {
 815                 // see if it can just use the last one
 816                         if (combine && combine->sfx == ch->sfx)
 817                         {
 818                                 combine->leftvol += ch->leftvol;
 819                                 combine->rightvol += ch->rightvol;
 820                                 ch->leftvol = ch->rightvol = 0;
 821                                 continue;
 822                         }
 823                 // search for one
 824                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 825                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 826                                 if (combine->sfx == ch->sfx)
 827                                         break;
 828
 829                         if (j == total_channels)
 830                                 combine = NULL;
 831                         else
 832                         {
 833                                 if (combine != ch)
 834                                 {
 835                                         combine->leftvol += ch->leftvol;
 836                                         combine->rightvol += ch->rightvol;
 837                                         ch->leftvol = ch->rightvol = 0;
 838                                 }
 839                                 continue;
 840                         }
 841                 }
 842         }
 843
 844 //
 845 // debugging output
 846 //
 847         if (snd_show.integer)
 848         {
 849                 total = 0;
 850                 ch = channels;
 851                 for (i=0 ; i<total_channels; i++, ch++)
 852                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 853                                 total++;
 854
 855                 Con_Printf("----(%u)----\n", total);
 856         }
 857
 858 // mix some sound
 859         S_Update_();
 860 }
 861
 862 void GetSoundtime(void)
 863 {
 864         int             samplepos;
 865         static  int             buffers;
 866         static  int             oldsamplepos;
 867         int             fullsamples;
 868
 869         fullsamples = shm->samples / shm->format.channels;
 870
 871 // it is possible to miscount buffers if it has wrapped twice between
 872 // calls to S_Update.  Oh well.
 873         samplepos = SNDDMA_GetDMAPos();
 874
 875         if (samplepos < oldsamplepos)
 876         {
 877                 buffers++;                                      // buffer wrapped
 878
 879                 if (paintedtime > 0x40000000)
 880                 {       // time to chop things off to avoid 32 bit limits
 881                         buffers = 0;
 882                         paintedtime = fullsamples;
 883                         S_StopAllSounds (true);
 884                 }
 885         }
 886         oldsamplepos = samplepos;
 887
 888         soundtime = buffers * fullsamples + samplepos / shm->format.channels;
 889 }
 890
 891 void IN_Accumulate (void);
 892
 893 void S_ExtraUpdate (void)
 894 {
 895
 896 #ifdef _WIN32
 897         IN_Accumulate ();
 898 #endif
 899
 900         if (snd_noextraupdate.integer)
 901                 return;         // don't pollute timings
 902         S_Update_();
 903 }
 904
 905 void S_Update_(void)
 906 {
 907         unsigned        endtime;
 908         int                             samps;
 909
 910         if (!sound_started || (snd_blocked > 0))
 911                 return;
 912
 913 // Updates DMA time
 914         GetSoundtime();
 915
 916 // check to make sure that we haven't overshot
 917         if (paintedtime < soundtime)
 918                 paintedtime = soundtime;
 919
 920 // mix ahead of current position
 921         endtime = soundtime + _snd_mixahead.value * shm->format.speed;
 922         samps = shm->samples >> (shm->format.channels - 1);
 923         if (endtime > (unsigned int)(soundtime + samps))
 924                 endtime = soundtime + samps;
 925
 926 #ifdef _WIN32
 927 // if the buffer was lost or stopped, restore it and/or restart it
 928         {
 929                 DWORD   dwStatus;
 930
 931                 if (pDSBuf)
 932                 {
 933                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
 934                                 Con_Print("Couldn't get sound buffer status\n");
 935
 936                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 937                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 938
 939                         if (!(dwStatus & DSBSTATUS_PLAYING))
 940                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 941                 }
 942         }
 943 #endif
 944
 945         S_PaintChannels (endtime);
 946
 947         SNDDMA_Submit ();
 948 }
 949
 950 /*
 951 ===============================================================================
 952
 953 console functions
 954
 955 ===============================================================================
 956 */
 957
 958 static void S_Play_Common(float fvol, float attenuation)
 959 {
 960         int     i;
 961         char name[256];
 962         sfx_t   *sfx;
 963
 964         i = 1;
 965         while (i<Cmd_Argc())
 966         {
 967                 if (!strrchr(Cmd_Argv(i), '.'))
 968                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
 969                 else
 970                         strlcpy(name, Cmd_Argv(i), sizeof(name));
 971                 sfx = S_PrecacheSound(name, true);
 972
 973                 // If we need to get the volume from the command line
 974                 if (fvol == -1.0f)
 975                 {
 976                         fvol = atof(Cmd_Argv(i+1));
 977                         i += 2;
 978                 }
 979                 else
 980                         i++;
 981
 982                 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
 983         }
 984 }
 985
 986 void S_Play(void)
 987 {
 988         S_Play_Common (1.0f, 1.0f);
 989 }
 990
 991 void S_Play2(void)
 992 {
 993         S_Play_Common (1.0f, 0.0f);
 994 }
 995
 996 void S_PlayVol(void)
 997 {
 998         S_Play_Common (-1.0f, 0.0f);
 999 }
1000
1001 void S_SoundList(void)
1002 {
1003         int             i;
1004         sfx_t   *sfx;
1005         int             size, total;
1006
1007         total = 0;
1008         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
1009         {
1010                 if (sfx->fetcher != NULL)
1011                 {
1012                         size = sfx->mempool->totalsize;
1013                         total += size;
1014                         Con_Printf("%c(%2db) %7i : %s\n", sfx->loopstart >= 0 ? 'L' : ' ', sfx->format.width * 8, size, sfx->name);
1015                 }
1016         }
1017         Con_Printf("Total resident: %i\n", total);
1018 }
1019
1020
1021 void S_LocalSound (char *sound)
1022 {
1023         sfx_t   *sfx;
1024
1025         if (!snd_initialized.integer || nosound.integer)
1026                 return;
1027
1028         sfx = S_PrecacheSound (sound, true);
1029         if (!sfx)
1030         {
1031                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1032                 return;
1033         }
1034         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1035 }
1036
1037
1038 #define RAWSAMPLESBUFFER 32768
1039 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1040 int s_rawsamplesbuffer_start;
1041 size_t s_rawsamplesbuffer_count;
1042
1043 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1044 {
1045         int b2, b3;
1046         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1047         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1048                 return;
1049         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1050         if (b2 + length > RAWSAMPLESBUFFER)
1051         {
1052                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1053                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1054                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1055         }
1056         else
1057                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1058         s_rawsamplesbuffer_count += length;
1059 }
1060
1061 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1062 {
1063         int b1, b2;
1064         size_t l;
1065         int i;
1066         short *in;
1067         int *out;
1068         int count;
1069         l = length;
1070         if (l > s_rawsamplesbuffer_count)
1071                 l = s_rawsamplesbuffer_count;
1072         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1073         if (b1 + l > RAWSAMPLESBUFFER)
1074         {
1075                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1076                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1077                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1078                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1079                         out[i] = in[i];
1080                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1081                         out[i] = in[i];
1082                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1083         }
1084         else
1085         {
1086                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1087                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1088                         out[i] = in[i];
1089                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1090         }
1091         if (l < (int)length)
1092         {
1093                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1094                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1095         }
1096         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1097         s_rawsamplesbuffer_count -= l;
1098 }
1099
1100 void S_RawSamples_ClearQueue(void)
1101 {
1102         s_rawsamplesbuffer_count = 0;
1103         s_rawsamplesbuffer_start = 0;
1104 }
1105
1106 int S_RawSamples_QueueWantsMore(void)
1107 {
1108         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->format.speed >> 1, RAWSAMPLESBUFFER >> 1))
1109                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1110         else
1111                 return 0;
1112 }
1113
1114 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1115 {
1116         if (inputlength != outputlength)
1117         {
1118                 int i, position, stopposition, step;
1119                 short *in, *out;
1120                 step = (float) inputlength * 256.0f / (float) outputlength;
1121                 position = 0;
1122                 stopposition = (inputlength - 1) << 8;
1123                 out = output;
1124                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1125                 {
1126                         in = input + ((position >> 8) << 1);
1127                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1128                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1129                         out += 2;
1130                 }
1131                 stopposition = inputlength << 8;
1132                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1133                 {
1134                         in = input + ((position >> 8) << 1);
1135                         out[0] = in[0];
1136                         out[1] = in[2];
1137                         out += 2;
1138                 }
1139         }
1140         else
1141                 memcpy(output, input, inputlength * sizeof(short[2]));
1142 }
1143
1144 int S_RawSamples_SampleRate(void)
1145 {
1146         return shm != NULL ? shm->format.speed : 0;
1147 }
1148