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_IsCached
 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         S_FindName(name);
 346 }
 347
 348 /*
 349 ==================
 350 S_PrecacheSound
 351
 352 ==================
 353 */
 354 sfx_t *S_PrecacheSound (char *name, int complain)
 355 {
 356         sfx_t *sfx;
 357
 358         if (!snd_initialized.integer)
 359                 return NULL;
 360
 361         sfx = S_FindName(name);
 362
 363         if (!nosound.integer && snd_precache.integer)
 364                 S_LoadSound(sfx, complain);
 365
 366         return sfx;
 367 }
 368
 369
 370 //=============================================================================
 371
 372 /*
 373 =================
 374 SND_PickChannel
 375 =================
 376 */
 377 channel_t *SND_PickChannel(int entnum, int entchannel)
 378 {
 379         int ch_idx;
 380         int first_to_die;
 381         int life_left;
 382
 383 // Check for replacement sound, or find the best one to replace
 384         first_to_die = -1;
 385         life_left = 0x7fffffff;
 386         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 387         {
 388                 if (entchannel != 0             // channel 0 never overrides
 389                 && channels[ch_idx].entnum == entnum
 390                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 391                 {       // always override sound from same entity
 392                         first_to_die = ch_idx;
 393                         break;
 394                 }
 395
 396                 // don't let monster sounds override player sounds
 397                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 398                         continue;
 399
 400                 if (channels[ch_idx].end - paintedtime < life_left)
 401                 {
 402                         life_left = channels[ch_idx].end - paintedtime;
 403                         first_to_die = ch_idx;
 404                 }
 405         }
 406
 407         if (first_to_die == -1)
 408                 return NULL;
 409
 410         if (channels[first_to_die].sfx)
 411                 channels[first_to_die].sfx = NULL;
 412
 413         return &channels[first_to_die];
 414 }
 415
 416 /*
 417 =================
 418 SND_Spatialize
 419 =================
 420 */
 421 void SND_Spatialize(channel_t *ch, int isstatic)
 422 {
 423         vec_t dist, scale, pan;
 424         vec3_t source_vec;
 425
 426         // anything coming from the view entity will always be full volume
 427         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 428         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 429         {
 430                 ch->leftvol = ch->master_vol;
 431                 ch->rightvol = ch->master_vol;
 432         }
 433         else
 434         {
 435                 // update sound origin if we know about the entity
 436                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 437                 {
 438                         //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]);
 439                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 440                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 441                                 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);
 442                 }
 443
 444                 // calculate stereo seperation and distance attenuation
 445                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 446                 dist = VectorNormalizeLength(source_vec);
 447                 // distance
 448                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 449                 // panning
 450                 pan = scale * DotProduct(listener_viewleft, source_vec);
 451                 // calculate the volumes
 452                 ch->leftvol = (int) (scale + pan);
 453                 ch->rightvol = (int) (scale - pan);
 454         }
 455
 456         // LordHavoc: allow adjusting volume of static sounds
 457         if (isstatic)
 458         {
 459                 ch->leftvol *= snd_staticvolume.value;
 460                 ch->rightvol *= snd_staticvolume.value;
 461         }
 462
 463         // clamp volumes
 464         ch->leftvol = bound(0, ch->leftvol, 255);
 465         ch->rightvol = bound(0, ch->rightvol, 255);
 466 }
 467
 468
 469 // =======================================================================
 470 // Start a sound effect
 471 // =======================================================================
 472
 473 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 474 {
 475         channel_t *target_chan, *check;
 476         sfxcache_t      *sc;
 477         int             vol;
 478         int             ch_idx;
 479         int             skip;
 480
 481         if (!sound_started || !sfx || !sfx->sfxcache || nosound.integer)
 482                 return;
 483
 484         vol = fvol*255;
 485
 486 // pick a channel to play on
 487         target_chan = SND_PickChannel(entnum, entchannel);
 488         if (!target_chan)
 489                 return;
 490
 491 // spatialize
 492         memset (target_chan, 0, sizeof(*target_chan));
 493         VectorCopy(origin, target_chan->origin);
 494         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 495         target_chan->master_vol = vol;
 496         target_chan->entnum = entnum;
 497         target_chan->entchannel = entchannel;
 498         SND_Spatialize(target_chan, false);
 499
 500         // LordHavoc: spawn the sound anyway because the player might teleport to it
 501         //if (!target_chan->leftvol && !target_chan->rightvol)
 502         //      return;         // not audible at all
 503
 504 // new channel
 505         sc = S_LoadSound (sfx, true);
 506         if (!sc)
 507         {
 508                 target_chan->sfx = NULL;
 509                 return;         // couldn't load the sound's data
 510         }
 511
 512         target_chan->sfx = sfx;
 513         target_chan->pos = 0.0;
 514         target_chan->end = paintedtime + sc->length;
 515
 516 // if an identical sound has also been started this frame, offset the pos
 517 // a bit to keep it from just making the first one louder
 518         check = &channels[NUM_AMBIENTS];
 519         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 520         {
 521                 if (check == target_chan)
 522                         continue;
 523                 if (check->sfx == sfx && !check->pos)
 524                 {
 525                         // LordHavoc: fixed skip calculations
 526                         skip = 0.1 * sc->speed;
 527                         if (skip > sc->length)
 528                                 skip = sc->length;
 529                         if (skip > 0)
 530                                 skip = rand() % skip;
 531                         target_chan->pos += skip;
 532                         target_chan->end -= skip;
 533                         break;
 534                 }
 535         }
 536 }
 537
 538 void S_StopSound(int entnum, int entchannel)
 539 {
 540         int i;
 541
 542         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 543         {
 544                 if (channels[i].entnum == entnum
 545                         && channels[i].entchannel == entchannel)
 546                 {
 547                         channels[i].end = 0;
 548                         channels[i].sfx = NULL;
 549                         return;
 550                 }
 551         }
 552 }
 553
 554 void S_StopAllSounds(qboolean clear)
 555 {
 556         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 557         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 558
 559         if (clear)
 560                 S_ClearBuffer();
 561 }
 562
 563 void S_StopAllSoundsC(void)
 564 {
 565         S_StopAllSounds(true);
 566 }
 567
 568 void S_ClearBuffer(void)
 569 {
 570         int             clear;
 571
 572         if (!sound_started || !shm)
 573                 return;
 574
 575         if (shm->samplebits == 8)
 576                 clear = 0x80;
 577         else
 578                 clear = 0;
 579
 580 #ifdef _WIN32
 581         if (pDSBuf)
 582         {
 583                 DWORD   dwSize;
 584                 DWORD   *pData;
 585                 int             reps;
 586                 HRESULT hresult;
 587
 588                 reps = 0;
 589
 590                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 591                 {
 592                         if (hresult != DSERR_BUFFERLOST)
 593                         {
 594                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 595                                 S_Shutdown ();
 596                                 return;
 597                         }
 598
 599                         if (++reps > 10000)
 600                         {
 601                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 602                                 S_Shutdown ();
 603                                 return;
 604                         }
 605                 }
 606
 607                 memset(pData, clear, shm->samples * shm->samplebits/8);
 608
 609                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 610
 611         }
 612         else
 613 #endif
 614         if (shm->buffer)
 615         {
 616                 int             setsize = shm->samples * shm->samplebits / 8;
 617                 char    *buf = shm->buffer;
 618
 619                 while (setsize--)
 620                         *buf++ = clear;
 621
 622 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 623 // reads the memory area before writing to it causing a seg fault
 624 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 625 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 626         }
 627 }
 628
 629
 630 /*
 631 =================
 632 S_StaticSound
 633 =================
 634 */
 635 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 636 {
 637         channel_t       *ss;
 638         sfxcache_t              *sc;
 639
 640         if (!sfx)
 641                 return;
 642
 643         if (total_channels == MAX_CHANNELS)
 644         {
 645                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 646                 return;
 647         }
 648
 649         sc = S_LoadSound (sfx, true);
 650         if (!sc)
 651                 return;
 652
 653         if (sc->loopstart == -1)
 654                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 655
 656         ss = &channels[total_channels++];
 657         memset(ss, 0, sizeof(*ss));
 658         ss->forceloop = true;
 659         ss->sfx = sfx;
 660         VectorCopy (origin, ss->origin);
 661         ss->master_vol = vol;
 662         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 663         ss->end = paintedtime + sc->length;
 664
 665         SND_Spatialize (ss, true);
 666 }
 667
 668
 669 //=============================================================================
 670
 671 /*
 672 ===================
 673 S_UpdateAmbientSounds
 674 ===================
 675 */
 676 void S_UpdateAmbientSounds (void)
 677 {
 678         float           vol;
 679         int                     ambient_channel;
 680         channel_t       *chan;
 681         qbyte           ambientlevels[NUM_AMBIENTS];
 682
 683         // LordHavoc: kill ambient sounds until proven otherwise
 684         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 685                 channels[ambient_channel].sfx = NULL;
 686
 687         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 688                 return;
 689
 690         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 691
 692 // calc ambient sound levels
 693         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 694         {
 695                 if (ambient_sfx[ambient_channel] && ambient_sfx[ambient_channel]->silentlymissing)
 696                         continue;
 697                 chan = &channels[ambient_channel];
 698                 chan->forceloop = true;
 699                 chan->sfx = ambient_sfx[ambient_channel];
 700
 701                 vol = ambient_level.value * ambientlevels[ambient_channel];
 702                 if (vol < 8)
 703                         vol = 0;
 704
 705         // don't adjust volume too fast
 706                 if (chan->master_vol < vol)
 707                 {
 708                         chan->master_vol += host_realframetime * ambient_fade.value;
 709                         if (chan->master_vol > vol)
 710                                 chan->master_vol = vol;
 711                 }
 712                 else if (chan->master_vol > vol)
 713                 {
 714                         chan->master_vol -= host_realframetime * ambient_fade.value;
 715                         if (chan->master_vol < vol)
 716                                 chan->master_vol = vol;
 717                 }
 718
 719                 chan->leftvol = chan->rightvol = chan->master_vol;
 720         }
 721 }
 722
 723
 724 /*
 725 ============
 726 S_Update
 727
 728 Called once each time through the main loop
 729 ============
 730 */
 731 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 732 {
 733         int                     i, j;
 734         int                     total;
 735         channel_t       *ch;
 736         channel_t       *combine;
 737
 738         if (!snd_initialized.integer || (snd_blocked > 0))
 739                 return;
 740
 741         VectorCopy(origin, listener_vieworigin);
 742         VectorCopy(forward, listener_viewforward);
 743         VectorCopy(left, listener_viewleft);
 744         VectorCopy(up, listener_viewup);
 745
 746 // update general area ambient sound sources
 747         S_UpdateAmbientSounds ();
 748
 749         combine = NULL;
 750
 751 // update spatialization for static and dynamic sounds
 752         ch = channels+NUM_AMBIENTS;
 753         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 754         {
 755                 if (!ch->sfx)
 756                         continue;
 757                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 758                 if (!ch->leftvol && !ch->rightvol)
 759                         continue;
 760
 761         // try to combine static sounds with a previous channel of the same
 762         // sound effect so we don't mix five torches every frame
 763
 764                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 765                 {
 766                 // see if it can just use the last one
 767                         if (combine && combine->sfx == ch->sfx)
 768                         {
 769                                 combine->leftvol += ch->leftvol;
 770                                 combine->rightvol += ch->rightvol;
 771                                 ch->leftvol = ch->rightvol = 0;
 772                                 continue;
 773                         }
 774                 // search for one
 775                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 776                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 777                                 if (combine->sfx == ch->sfx)
 778                                         break;
 779
 780                         if (j == total_channels)
 781                                 combine = NULL;
 782                         else
 783                         {
 784                                 if (combine != ch)
 785                                 {
 786                                         combine->leftvol += ch->leftvol;
 787                                         combine->rightvol += ch->rightvol;
 788                                         ch->leftvol = ch->rightvol = 0;
 789                                 }
 790                                 continue;
 791                         }
 792                 }
 793         }
 794
 795 //
 796 // debugging output
 797 //
 798         if (snd_show.integer)
 799         {
 800                 total = 0;
 801                 ch = channels;
 802                 for (i=0 ; i<total_channels; i++, ch++)
 803                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 804                                 total++;
 805
 806                 Con_Printf ("----(%i)----\n", total);
 807         }
 808
 809 // mix some sound
 810         S_Update_();
 811 }
 812
 813 void GetSoundtime(void)
 814 {
 815         int             samplepos;
 816         static  int             buffers;
 817         static  int             oldsamplepos;
 818         int             fullsamples;
 819
 820         fullsamples = shm->samples / shm->channels;
 821
 822 // it is possible to miscount buffers if it has wrapped twice between
 823 // calls to S_Update.  Oh well.
 824         samplepos = SNDDMA_GetDMAPos();
 825
 826         if (samplepos < oldsamplepos)
 827         {
 828                 buffers++;                                      // buffer wrapped
 829
 830                 if (paintedtime > 0x40000000)
 831                 {       // time to chop things off to avoid 32 bit limits
 832                         buffers = 0;
 833                         paintedtime = fullsamples;
 834                         S_StopAllSounds (true);
 835                 }
 836         }
 837         oldsamplepos = samplepos;
 838
 839         soundtime = buffers*fullsamples + samplepos/shm->channels;
 840 }
 841
 842 void IN_Accumulate (void);
 843
 844 void S_ExtraUpdate (void)
 845 {
 846
 847 #ifdef _WIN32
 848         IN_Accumulate ();
 849 #endif
 850
 851         if (snd_noextraupdate.integer)
 852                 return;         // don't pollute timings
 853         S_Update_();
 854 }
 855
 856 void S_Update_(void)
 857 {
 858         unsigned        endtime;
 859         int                             samps;
 860
 861         if (!sound_started || (snd_blocked > 0))
 862                 return;
 863
 864 // Updates DMA time
 865         GetSoundtime();
 866
 867 // check to make sure that we haven't overshot
 868         if (paintedtime < soundtime)
 869                 paintedtime = soundtime;
 870
 871 // mix ahead of current position
 872         endtime = soundtime + _snd_mixahead.value * shm->speed;
 873         samps = shm->samples >> (shm->channels-1);
 874         if (endtime > (unsigned int)(soundtime + samps))
 875                 endtime = soundtime + samps;
 876
 877 #ifdef _WIN32
 878 // if the buffer was lost or stopped, restore it and/or restart it
 879         {
 880                 DWORD   dwStatus;
 881
 882                 if (pDSBuf)
 883                 {
 884                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 885                                 Con_Printf ("Couldn't get sound buffer status\n");
 886
 887                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 888                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 889
 890                         if (!(dwStatus & DSBSTATUS_PLAYING))
 891                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 892                 }
 893         }
 894 #endif
 895
 896         S_PaintChannels (endtime);
 897
 898         SNDDMA_Submit ();
 899 }
 900
 901 /*
 902 ===============================================================================
 903
 904 console functions
 905
 906 ===============================================================================
 907 */
 908
 909 static void S_Play_Common(float fvol, float attenuation)
 910 {
 911         int     i;
 912         char name[256];
 913         sfx_t   *sfx;
 914
 915         i = 1;
 916         while (i<Cmd_Argc())
 917         {
 918                 if (!strrchr(Cmd_Argv(i), '.'))
 919                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
 920                 else
 921                         strlcpy(name, Cmd_Argv(i), sizeof(name));
 922                 sfx = S_PrecacheSound(name, true);
 923
 924                 // If we need to get the volume from the command line
 925                 if (fvol == -1.0f)
 926                 {
 927                         fvol = atof(Cmd_Argv(i+1));
 928                         i += 2;
 929                 }
 930                 else
 931                         i++;
 932
 933                 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
 934         }
 935 }
 936
 937 void S_Play(void)
 938 {
 939         S_Play_Common (1.0f, 1.0f);
 940 }
 941
 942 void S_Play2(void)
 943 {
 944         S_Play_Common (1.0f, 0.0f);
 945 }
 946
 947 void S_PlayVol(void)
 948 {
 949         S_Play_Common (-1.0f, 0.0f);
 950 }
 951
 952 void S_SoundList(void)
 953 {
 954         int             i;
 955         sfx_t   *sfx;
 956         sfxcache_t      *sc;
 957         int             size, total;
 958
 959         total = 0;
 960         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 961         {
 962                 sc = sfx->sfxcache;
 963                 if (sc)
 964                 {
 965                         size = sc->length*sc->width*(sc->stereo+1);
 966                         total += size;
 967                         Con_Printf("%c(%2db) %6i : %s\n", sc->loopstart >= 0 ? 'L' : ' ',sc->width*8,  size, sfx->name);
 968                 }
 969         }
 970         Con_Printf("Total resident: %i\n", total);
 971 }
 972
 973
 974 void S_LocalSound (char *sound)
 975 {
 976         sfx_t   *sfx;
 977
 978         if (!snd_initialized.integer || nosound.integer)
 979                 return;
 980
 981         sfx = S_PrecacheSound (sound, true);
 982         if (!sfx)
 983         {
 984                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
 985                 return;
 986         }
 987         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
 988 }
 989
 990
 991 void S_ClearPrecache (void)
 992 {
 993 }
 994
 995
 996 void S_BeginPrecaching (void)
 997 {
 998 }
 999
1000
1001 void S_EndPrecaching (void)
1002 {
1003 }
1004
1005
1006 #define RAWSAMPLESBUFFER 32768
1007 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1008 int s_rawsamplesbuffer_start;
1009 int s_rawsamplesbuffer_count;
1010
1011 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1012 {
1013         int b2, b3;
1014         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1015         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1016                 return;
1017         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1018         if (b2 + length > RAWSAMPLESBUFFER)
1019         {
1020                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1021                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1022                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1023         }
1024         else
1025                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1026         s_rawsamplesbuffer_count += length;
1027 }
1028
1029 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1030 {
1031         int b1, b2, l;
1032         int i;
1033         short *in;
1034         int *out;
1035         int count;
1036         l = length;
1037         if (l > s_rawsamplesbuffer_count)
1038                 l = s_rawsamplesbuffer_count;
1039         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1040         if (b1 + l > RAWSAMPLESBUFFER)
1041         {
1042                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1043                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1044                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1045                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1046                         out[i] = in[i];
1047                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1048                         out[i] = in[i];
1049                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1050         }
1051         else
1052         {
1053                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1054                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1055                         out[i] = in[i];
1056                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1057         }
1058         if (l < (int)length)
1059         {
1060                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1061                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1062         }
1063         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1064         s_rawsamplesbuffer_count -= l;
1065 }
1066
1067 void S_RawSamples_ClearQueue(void)
1068 {
1069         s_rawsamplesbuffer_count = 0;
1070         s_rawsamplesbuffer_start = 0;
1071 }
1072
1073 int S_RawSamples_QueueWantsMore(void)
1074 {
1075         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1076                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1077         else
1078                 return 0;
1079 }
1080
1081 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1082 {
1083         if (inputlength != outputlength)
1084         {
1085                 int i, position, stopposition, step;
1086                 short *in, *out;
1087                 step = (float) inputlength * 256.0f / (float) outputlength;
1088                 position = 0;
1089                 stopposition = (inputlength - 1) << 8;
1090                 out = output;
1091                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1092                 {
1093                         in = input + ((position >> 8) << 1);
1094                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1095                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1096                         out += 2;
1097                 }
1098                 stopposition = inputlength << 8;
1099                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1100                 {
1101                         in = input + ((position >> 8) << 1);
1102                         out[0] = in[0];
1103                         out[1] = in[2];
1104                         out += 2;
1105                 }
1106         }
1107         else
1108                 memcpy(output, input, inputlength * sizeof(short[2]));
1109 }
1110
1111 int S_RawSamples_SampleRate(void)
1112 {
1113         return shm != NULL ? shm->speed : 0;
1114 }
1115