snd_dma.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // snd_dma.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #ifdef _WIN32
  25 #include "winquake.h"
  26 #endif
  27
  28 void S_Play(void);
  29 void S_PlayVol(void);
  30 void S_Play2(void);
  31 void S_SoundList(void);
  32 void S_Update_();
  33 void S_StopAllSounds(qboolean clear);
  34 void S_StopAllSoundsC(void);
  35
  36 // =======================================================================
  37 // Internal sound data & structures
  38 // =======================================================================
  39
  40 channel_t channels[MAX_CHANNELS];
  41 int total_channels;
  42
  43 int snd_blocked = 0;
  44 static qboolean snd_ambient = 1;
  45 qboolean snd_initialized = false;
  46
  47 // pointer should go away
  48 volatile dma_t *shm = 0;
  49 volatile dma_t sn;
  50
  51 vec3_t listener_origin;
  52 vec3_t listener_forward;
  53 vec3_t listener_right;
  54 vec3_t listener_up;
  55 vec_t sound_nominal_clip_dist=1000.0;
  56 mempool_t *snd_mempool;
  57
  58 // sample PAIRS
  59 int soundtime;
  60 int paintedtime;
  61
  62
  63 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  64 #define MAX_SFX 4096
  65 sfx_t *known_sfx; // allocated [MAX_SFX]
  66 int num_sfx;
  67
  68 sfx_t *ambient_sfx[NUM_AMBIENTS];
  69
  70 int sound_started = 0;
  71
  72 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  73 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  74 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  75
  76 cvar_t nosound = {0, "nosound", "0"};
  77 cvar_t snd_precache = {0, "snd_precache", "1"};
  78 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  79 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  80 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  81 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  82 cvar_t snd_show = {0, "snd_show", "0"};
  83 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  84 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  85
  86
  87 // ====================================================================
  88 // User-setable variables
  89 // ====================================================================
  90
  91
  92 //
  93 // Fake dma is a synchronous faking of the DMA progress used for
  94 // isolating performance in the renderer.  The fakedma_updates is
  95 // number of times S_Update() is called per second.
  96 //
  97
  98 qboolean fakedma = false;
  99 int fakedma_updates = 15;
 100
 101
 102 void S_AmbientOff (void)
 103 {
 104         snd_ambient = false;
 105 }
 106
 107
 108 void S_AmbientOn (void)
 109 {
 110         snd_ambient = true;
 111 }
 112
 113
 114 void S_SoundInfo_f(void)
 115 {
 116         if (!sound_started || !shm)
 117         {
 118                 Con_Printf ("sound system not started\n");
 119                 return;
 120         }
 121
 122         Con_Printf("%5d stereo\n", shm->channels - 1);
 123         Con_Printf("%5d samples\n", shm->samples);
 124         Con_Printf("%5d samplepos\n", shm->samplepos);
 125         Con_Printf("%5d samplebits\n", shm->samplebits);
 126         Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
 127         Con_Printf("%5d speed\n", shm->speed);
 128         Con_Printf("0x%x dma buffer\n", shm->buffer);
 129         Con_Printf("%5d total_channels\n", total_channels);
 130 }
 131
 132
 133 /*
 134 ================
 135 S_Startup
 136 ================
 137 */
 138 void S_Startup (void)
 139 {
 140         int rc;
 141
 142         if (!snd_initialized)
 143                 return;
 144
 145         if (!fakedma)
 146         {
 147                 rc = SNDDMA_Init();
 148
 149                 if (!rc)
 150                 {
 151                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
 152                         sound_started = 0;
 153                         return;
 154                 }
 155         }
 156
 157         sound_started = 1;
 158 }
 159
 160 /*
 161 ================
 162 S_Init
 163 ================
 164 */
 165 void S_Init (void)
 166 {
 167         Con_DPrintf("\nSound Initialization\n");
 168
 169         S_RawSamples_ClearQueue();
 170
 171         Cvar_RegisterVariable(&volume);
 172         Cvar_RegisterVariable(&bgmvolume);
 173         Cvar_RegisterVariable(&snd_staticvolume);
 174
 175         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 176                 return;
 177
 178         snd_mempool = Mem_AllocPool("sound");
 179
 180         if (COM_CheckParm("-simsound"))
 181                 fakedma = true;
 182
 183         Cmd_AddCommand("play", S_Play);
 184         Cmd_AddCommand("play2", S_Play2);
 185         Cmd_AddCommand("playvol", S_PlayVol);
 186         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 187         Cmd_AddCommand("soundlist", S_SoundList);
 188         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 189
 190         Cvar_RegisterVariable(&nosound);
 191         Cvar_RegisterVariable(&snd_precache);
 192         Cvar_RegisterVariable(&bgmbuffer);
 193         Cvar_RegisterVariable(&ambient_level);
 194         Cvar_RegisterVariable(&ambient_fade);
 195         Cvar_RegisterVariable(&snd_noextraupdate);
 196         Cvar_RegisterVariable(&snd_show);
 197         Cvar_RegisterVariable(&_snd_mixahead);
 198         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 199
 200         snd_initialized = true;
 201
 202         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 203         num_sfx = 0;
 204
 205         S_Startup ();
 206
 207         SND_InitScaletable ();
 208
 209 // create a piece of DMA memory
 210
 211         if (fakedma)
 212         {
 213                 shm = (void *) Mem_Alloc(snd_mempool, sizeof(*shm));
 214                 shm->splitbuffer = 0;
 215                 shm->samplebits = 16;
 216                 shm->speed = 22050;
 217                 shm->channels = 2;
 218                 shm->samples = 32768;
 219                 shm->samplepos = 0;
 220                 shm->soundalive = true;
 221                 shm->gamealive = true;
 222                 shm->submission_chunk = 1;
 223                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
 224         }
 225
 226         if (!sound_started)
 227                 return;
 228
 229         Con_DPrintf ("Sound sampling rate: %i\n", shm->speed);
 230
 231         // provides a tick sound until washed clean
 232
 233         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 234         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 235
 236         S_StopAllSounds (true);
 237 }
 238
 239
 240 // =======================================================================
 241 // Shutdown sound engine
 242 // =======================================================================
 243
 244 void S_Shutdown(void)
 245 {
 246         if (!sound_started)
 247                 return;
 248
 249         if (shm)
 250                 shm->gamealive = 0;
 251
 252         shm = 0;
 253         sound_started = 0;
 254
 255         if (!fakedma)
 256                 SNDDMA_Shutdown();
 257 }
 258
 259
 260 // =======================================================================
 261 // Load a sound
 262 // =======================================================================
 263
 264 /*
 265 ==================
 266 S_FindName
 267
 268 ==================
 269 */
 270 sfx_t *S_FindName (char *name)
 271 {
 272         int i;
 273         sfx_t *sfx;
 274
 275         if (!name)
 276                 Host_Error ("S_FindName: NULL\n");
 277
 278         if (strlen(name) >= MAX_QPATH)
 279                 Host_Error ("Sound name too long: %s", name);
 280
 281 // see if already loaded
 282         for (i = 0;i < num_sfx;i++)
 283                 if (!strcmp(known_sfx[i].name, name))
 284                         return &known_sfx[i];
 285
 286         if (num_sfx == MAX_SFX)
 287                 Sys_Error ("S_FindName: out of sfx_t");
 288
 289         sfx = &known_sfx[i];
 290         memset(sfx, 0, sizeof(*sfx));
 291         strcpy (sfx->name, name);
 292
 293         num_sfx++;
 294
 295         return sfx;
 296 }
 297
 298
 299 /*
 300 ==================
 301 S_TouchSound
 302
 303 ==================
 304 */
 305 void S_TouchSound (char *name)
 306 {
 307         sfx_t   *sfx;
 308
 309         if (!sound_started)
 310                 return;
 311
 312         sfx = S_FindName (name);
 313 }
 314
 315 /*
 316 ==================
 317 S_PrecacheSound
 318
 319 ==================
 320 */
 321 sfx_t *S_PrecacheSound (char *name, int complain)
 322 {
 323         sfx_t *sfx;
 324
 325         if (!sound_started || nosound.integer)
 326                 return NULL;
 327
 328         sfx = S_FindName (name);
 329
 330 // cache it in
 331         if (snd_precache.integer)
 332                 S_LoadSound (sfx, complain);
 333
 334         return sfx;
 335 }
 336
 337
 338 //=============================================================================
 339
 340 /*
 341 =================
 342 SND_PickChannel
 343 =================
 344 */
 345 channel_t *SND_PickChannel(int entnum, int entchannel)
 346 {
 347         int ch_idx;
 348         int first_to_die;
 349         int life_left;
 350
 351 // Check for replacement sound, or find the best one to replace
 352         first_to_die = -1;
 353         life_left = 0x7fffffff;
 354         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 355         {
 356                 if (entchannel != 0             // channel 0 never overrides
 357                 && channels[ch_idx].entnum == entnum
 358                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 359                 {       // always override sound from same entity
 360                         first_to_die = ch_idx;
 361                         break;
 362                 }
 363
 364                 // don't let monster sounds override player sounds
 365                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 366                         continue;
 367
 368                 if (channels[ch_idx].end - paintedtime < life_left)
 369                 {
 370                         life_left = channels[ch_idx].end - paintedtime;
 371                         first_to_die = ch_idx;
 372                 }
 373         }
 374
 375         if (first_to_die == -1)
 376                 return NULL;
 377
 378         if (channels[first_to_die].sfx)
 379                 channels[first_to_die].sfx = NULL;
 380
 381         return &channels[first_to_die];
 382 }
 383
 384 /*
 385 =================
 386 SND_Spatialize
 387 =================
 388 */
 389 void SND_Spatialize(channel_t *ch, int isstatic)
 390 {
 391         vec_t dot;
 392         vec_t dist;
 393         vec_t lscale, rscale, scale;
 394         vec3_t source_vec;
 395         sfx_t *snd;
 396
 397         // anything coming from the view entity will always be full volume
 398         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 399         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 400         {
 401                 ch->leftvol = ch->master_vol;
 402                 ch->rightvol = ch->master_vol;
 403         }
 404         else
 405         {
 406                 // update sound origin if we know about the entity
 407                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 408                 {
 409                         //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]);
 410                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 411                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->type == mod_brush)
 412                                 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);
 413                 }
 414
 415                 // calculate stereo seperation and distance attenuation
 416                 snd = ch->sfx;
 417                 VectorSubtract(ch->origin, listener_origin, source_vec);
 418
 419                 dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 420
 421                 dot = DotProduct(listener_right, source_vec);
 422
 423                 if (shm->channels == 1)
 424                 {
 425                         rscale = 1.0;
 426                         lscale = 1.0;
 427                 }
 428                 else
 429                 {
 430                         rscale = 1.0 + dot;
 431                         lscale = 1.0 - dot;
 432                 }
 433
 434                 // add in distance effect
 435                 scale = (1.0 - dist) * rscale;
 436                 ch->rightvol = (int) (ch->master_vol * scale);
 437                 if (ch->rightvol < 0)
 438                         ch->rightvol = 0;
 439
 440                 scale = (1.0 - dist) * lscale;
 441                 ch->leftvol = (int) (ch->master_vol * scale);
 442                 if (ch->leftvol < 0)
 443                         ch->leftvol = 0;
 444         }
 445
 446         // LordHavoc: allow adjusting volume of static sounds
 447         if (isstatic)
 448         {
 449                 ch->leftvol *= snd_staticvolume.value;
 450                 ch->rightvol *= snd_staticvolume.value;
 451         }
 452 }
 453
 454
 455 // =======================================================================
 456 // Start a sound effect
 457 // =======================================================================
 458
 459 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 460 {
 461         channel_t *target_chan, *check;
 462         sfxcache_t      *sc;
 463         int             vol;
 464         int             ch_idx;
 465         int             skip;
 466
 467         if (!sound_started)
 468                 return;
 469
 470         if (!sfx)
 471                 return;
 472
 473         if (nosound.integer)
 474                 return;
 475
 476         vol = fvol*255;
 477
 478 // pick a channel to play on
 479         target_chan = SND_PickChannel(entnum, entchannel);
 480         if (!target_chan)
 481                 return;
 482
 483 // spatialize
 484         memset (target_chan, 0, sizeof(*target_chan));
 485         /*
 486         if (cls.state == ca_connected && entnum > 0 && cl_entities[entnum].state_current.active)
 487         {
 488                 target_chan.follow = true;
 489                 VectorSubtract(origin, cl_entities[entnum].state_current.origin, target_chan.followoriginoffset);
 490         }
 491         */
 492         VectorCopy(origin, target_chan->origin);
 493         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 494         target_chan->master_vol = vol;
 495         target_chan->entnum = entnum;
 496         target_chan->entchannel = entchannel;
 497         SND_Spatialize(target_chan, false);
 498
 499         if (!target_chan->leftvol && !target_chan->rightvol)
 500                 return;         // not audible at all
 501
 502 // new channel
 503         sc = S_LoadSound (sfx, true);
 504         if (!sc)
 505         {
 506                 target_chan->sfx = NULL;
 507                 return;         // couldn't load the sound's data
 508         }
 509
 510         target_chan->sfx = sfx;
 511         target_chan->pos = 0.0;
 512         target_chan->end = paintedtime + sc->length;
 513
 514 // if an identical sound has also been started this frame, offset the pos
 515 // a bit to keep it from just making the first one louder
 516         check = &channels[NUM_AMBIENTS];
 517         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 518         {
 519                 if (check == target_chan)
 520                         continue;
 521                 if (check->sfx == sfx && !check->pos)
 522                 {
 523                         // LordHavoc: fixed skip calculations
 524                         skip = 0.1 * shm->speed;
 525                         if (skip > sc->length)
 526                                 skip = sc->length;
 527                         if (skip > 0)
 528                                 skip = rand() % skip;
 529                         target_chan->pos += skip;
 530                         target_chan->end -= skip;
 531                         break;
 532                 }
 533
 534         }
 535 }
 536
 537 void S_StopSound(int entnum, int entchannel)
 538 {
 539         int i;
 540
 541         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 542         {
 543                 if (channels[i].entnum == entnum
 544                         && channels[i].entchannel == entchannel)
 545                 {
 546                         channels[i].end = 0;
 547                         channels[i].sfx = NULL;
 548                         return;
 549                 }
 550         }
 551 }
 552
 553 void S_StopAllSounds(qboolean clear)
 554 {
 555         if (!sound_started)
 556                 return;
 557
 558         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 559         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 560
 561         if (clear)
 562                 S_ClearBuffer ();
 563 }
 564
 565 void S_StopAllSoundsC (void)
 566 {
 567         S_StopAllSounds (true);
 568 }
 569
 570 void S_ClearBuffer (void)
 571 {
 572         int             clear;
 573
 574 #ifdef _WIN32
 575         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 576 #else
 577         if (!sound_started || !shm || !shm->buffer)
 578 #endif
 579                 return;
 580
 581         if (shm->samplebits == 8)
 582                 clear = 0x80;
 583         else
 584                 clear = 0;
 585
 586 #ifdef _WIN32
 587         if (pDSBuf)
 588         {
 589                 DWORD   dwSize;
 590                 DWORD   *pData;
 591                 int             reps;
 592                 HRESULT hresult;
 593
 594                 reps = 0;
 595
 596                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 597                 {
 598                         if (hresult != DSERR_BUFFERLOST)
 599                         {
 600                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 601                                 S_Shutdown ();
 602                                 return;
 603                         }
 604
 605                         if (++reps > 10000)
 606                         {
 607                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 608                                 S_Shutdown ();
 609                                 return;
 610                         }
 611                 }
 612
 613                 memset(pData, clear, shm->samples * shm->samplebits/8);
 614
 615                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 616
 617         }
 618         else
 619 #endif
 620         {
 621                 int             setsize = shm->samples * shm->samplebits / 8;
 622                 char    *buf = shm->buffer;
 623
 624                 while (setsize--)
 625                         *buf++ = 0;
 626
 627 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 628 // reads the memory area before writing to it causing a seg fault
 629 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 630 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 631         }
 632 }
 633
 634
 635 /*
 636 =================
 637 S_StaticSound
 638 =================
 639 */
 640 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 641 {
 642         channel_t       *ss;
 643         sfxcache_t              *sc;
 644
 645         if (!sfx)
 646                 return;
 647
 648         if (total_channels == MAX_CHANNELS)
 649         {
 650                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 651                 return;
 652         }
 653
 654         sc = S_LoadSound (sfx, true);
 655         if (!sc)
 656                 return;
 657
 658         if (sc->loopstart == -1)
 659                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 660
 661         ss = &channels[total_channels++];
 662         memset(ss, 0, sizeof(*ss));
 663         ss->forceloop = true;
 664         ss->sfx = sfx;
 665         VectorCopy (origin, ss->origin);
 666         ss->master_vol = vol;
 667         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 668         ss->end = paintedtime + sc->length;
 669
 670         SND_Spatialize (ss, true);
 671 }
 672
 673
 674 //=============================================================================
 675
 676 /*
 677 ===================
 678 S_UpdateAmbientSounds
 679 ===================
 680 */
 681 void S_UpdateAmbientSounds (void)
 682 {
 683         mleaf_t         *l;
 684         float           vol;
 685         int                     ambient_channel;
 686         channel_t       *chan;
 687
 688         // LordHavoc: kill ambient sounds until proven otherwise
 689         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 690                 channels[ambient_channel].sfx = NULL;
 691
 692         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brushq1.PointInLeaf || (l = cl.worldmodel->brushq1.PointInLeaf(cl.worldmodel, listener_origin)) == NULL)
 693                 return;
 694
 695 // calc ambient sound levels
 696         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 697         {
 698                 if (ambient_sfx[ambient_channel] && ambient_sfx[ambient_channel]->silentlymissing)
 699                         continue;
 700                 chan = &channels[ambient_channel];
 701                 chan->forceloop = true;
 702                 chan->sfx = ambient_sfx[ambient_channel];
 703
 704                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 705                 if (vol < 8)
 706                         vol = 0;
 707
 708         // don't adjust volume too fast
 709                 if (chan->master_vol < vol)
 710                 {
 711                         chan->master_vol += host_realframetime * ambient_fade.value;
 712                         if (chan->master_vol > vol)
 713                                 chan->master_vol = vol;
 714                 }
 715                 else if (chan->master_vol > vol)
 716                 {
 717                         chan->master_vol -= host_realframetime * ambient_fade.value;
 718                         if (chan->master_vol < vol)
 719                                 chan->master_vol = vol;
 720                 }
 721
 722                 chan->leftvol = chan->rightvol = chan->master_vol;
 723         }
 724 }
 725
 726
 727 /*
 728 ============
 729 S_Update
 730
 731 Called once each time through the main loop
 732 ============
 733 */
 734 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 735 {
 736         int                     i, j;
 737         int                     total;
 738         channel_t       *ch;
 739         channel_t       *combine;
 740
 741         if (!sound_started || (snd_blocked > 0))
 742                 return;
 743
 744         VectorCopy(origin, listener_origin);
 745         VectorCopy(forward, listener_forward);
 746         VectorCopy(right, listener_right);
 747         VectorCopy(up, listener_up);
 748
 749 // update general area ambient sound sources
 750         S_UpdateAmbientSounds ();
 751
 752         combine = NULL;
 753
 754 // update spatialization for static and dynamic sounds
 755         ch = channels+NUM_AMBIENTS;
 756         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 757         {
 758                 if (!ch->sfx)
 759                         continue;
 760                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 761                 if (!ch->leftvol && !ch->rightvol)
 762                         continue;
 763
 764         // try to combine static sounds with a previous channel of the same
 765         // sound effect so we don't mix five torches every frame
 766
 767                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 768                 {
 769                 // see if it can just use the last one
 770                         if (combine && combine->sfx == ch->sfx)
 771                         {
 772                                 combine->leftvol += ch->leftvol;
 773                                 combine->rightvol += ch->rightvol;
 774                                 ch->leftvol = ch->rightvol = 0;
 775                                 continue;
 776                         }
 777                 // search for one
 778                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 779                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 780                                 if (combine->sfx == ch->sfx)
 781                                         break;
 782
 783                         if (j == total_channels)
 784                                 combine = NULL;
 785                         else
 786                         {
 787                                 if (combine != ch)
 788                                 {
 789                                         combine->leftvol += ch->leftvol;
 790                                         combine->rightvol += ch->rightvol;
 791                                         ch->leftvol = ch->rightvol = 0;
 792                                 }
 793                                 continue;
 794                         }
 795                 }
 796         }
 797
 798 //
 799 // debugging output
 800 //
 801         if (snd_show.integer)
 802         {
 803                 total = 0;
 804                 ch = channels;
 805                 for (i=0 ; i<total_channels; i++, ch++)
 806                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 807                                 total++;
 808
 809                 Con_Printf ("----(%i)----\n", total);
 810         }
 811
 812 // mix some sound
 813         S_Update_();
 814 }
 815
 816 void GetSoundtime(void)
 817 {
 818         int             samplepos;
 819         static  int             buffers;
 820         static  int             oldsamplepos;
 821         int             fullsamples;
 822
 823         fullsamples = shm->samples / shm->channels;
 824
 825 // it is possible to miscount buffers if it has wrapped twice between
 826 // calls to S_Update.  Oh well.
 827 #ifdef __sun__
 828         soundtime = SNDDMA_GetSamples();
 829 #else
 830         samplepos = SNDDMA_GetDMAPos();
 831
 832
 833         if (samplepos < oldsamplepos)
 834         {
 835                 buffers++;                                      // buffer wrapped
 836
 837                 if (paintedtime > 0x40000000)
 838                 {       // time to chop things off to avoid 32 bit limits
 839                         buffers = 0;
 840                         paintedtime = fullsamples;
 841                         S_StopAllSounds (true);
 842                 }
 843         }
 844         oldsamplepos = samplepos;
 845
 846         soundtime = buffers*fullsamples + samplepos/shm->channels;
 847 #endif
 848 }
 849
 850 void IN_Accumulate (void);
 851
 852 void S_ExtraUpdate (void)
 853 {
 854
 855 #ifdef _WIN32
 856         IN_Accumulate ();
 857 #endif
 858
 859         if (snd_noextraupdate.integer)
 860                 return;         // don't pollute timings
 861         S_Update_();
 862 }
 863
 864 void S_Update_(void)
 865 {
 866         unsigned        endtime;
 867         int                             samps;
 868
 869         if (!sound_started || (snd_blocked > 0))
 870                 return;
 871
 872 // Updates DMA time
 873         GetSoundtime();
 874
 875 // check to make sure that we haven't overshot
 876         if (paintedtime < soundtime)
 877                 paintedtime = soundtime;
 878
 879 // mix ahead of current position
 880         endtime = soundtime + _snd_mixahead.value * shm->speed;
 881         samps = shm->samples >> (shm->channels-1);
 882         if (endtime > (unsigned int)(soundtime + samps))
 883                 endtime = soundtime + samps;
 884
 885 #ifdef _WIN32
 886 // if the buffer was lost or stopped, restore it and/or restart it
 887         {
 888                 DWORD   dwStatus;
 889
 890                 if (pDSBuf)
 891                 {
 892                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 893                                 Con_Printf ("Couldn't get sound buffer status\n");
 894
 895                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 896                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 897
 898                         if (!(dwStatus & DSBSTATUS_PLAYING))
 899                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 900                 }
 901         }
 902 #endif
 903
 904         S_PaintChannels (endtime);
 905
 906         SNDDMA_Submit ();
 907 }
 908
 909 /*
 910 ===============================================================================
 911
 912 console functions
 913
 914 ===============================================================================
 915 */
 916
 917 void S_Play(void)
 918 {
 919         int     i;
 920         char name[256];
 921         sfx_t   *sfx;
 922
 923         i = 1;
 924         while (i<Cmd_Argc())
 925         {
 926                 if (!strrchr(Cmd_Argv(i), '.'))
 927                 {
 928                         strcpy(name, Cmd_Argv(i));
 929                         strcat(name, ".wav");
 930                 }
 931                 else
 932                         strcpy(name, Cmd_Argv(i));
 933                 sfx = S_PrecacheSound(name, true);
 934                 S_StartSound(-1, 0, sfx, listener_origin, 1.0, 1.0);
 935                 i++;
 936         }
 937 }
 938
 939 void S_Play2(void)
 940 {
 941         int     i;
 942         char name[256];
 943         sfx_t   *sfx;
 944
 945         i = 1;
 946         while (i<Cmd_Argc())
 947         {
 948                 if (!strrchr(Cmd_Argv(i), '.'))
 949                 {
 950                         strcpy(name, Cmd_Argv(i));
 951                         strcat(name, ".wav");
 952                 }
 953                 else
 954                         strcpy(name, Cmd_Argv(i));
 955                 sfx = S_PrecacheSound(name, true);
 956                 S_StartSound(-1, 0, sfx, listener_origin, 1.0, 0.0);
 957                 i++;
 958         }
 959 }
 960
 961 void S_PlayVol(void)
 962 {
 963         int i;
 964         float vol;
 965         char name[256];
 966         sfx_t   *sfx;
 967
 968         i = 1;
 969         while (i<Cmd_Argc())
 970         {
 971                 if (!strrchr(Cmd_Argv(i), '.'))
 972                 {
 973                         strcpy(name, Cmd_Argv(i));
 974                         strcat(name, ".wav");
 975                 }
 976                 else
 977                         strcpy(name, Cmd_Argv(i));
 978                 sfx = S_PrecacheSound(name, true);
 979                 vol = atof(Cmd_Argv(i+1));
 980                 S_StartSound(-1, 0, sfx, listener_origin, vol, 1.0);
 981                 i+=2;
 982         }
 983 }
 984
 985 void S_SoundList(void)
 986 {
 987         int             i;
 988         sfx_t   *sfx;
 989         sfxcache_t      *sc;
 990         int             size, total;
 991
 992         total = 0;
 993         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 994         {
 995                 sc = sfx->sfxcache;
 996                 if (!sc)
 997                         continue;
 998                 size = sc->length*sc->width*(sc->stereo+1);
 999                 total += size;
1000                 if (sc->loopstart >= 0)
1001                         Con_Printf ("L");
1002                 else
1003                         Con_Printf (" ");
1004                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
1005         }
1006         Con_Printf ("Total resident: %i\n", total);
1007 }
1008
1009
1010 void S_LocalSound (char *sound)
1011 {
1012         sfx_t   *sfx;
1013
1014         if (nosound.integer)
1015                 return;
1016         if (!sound_started)
1017                 return;
1018
1019         sfx = S_PrecacheSound (sound, true);
1020         if (!sfx)
1021         {
1022                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1023                 return;
1024         }
1025         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1026 }
1027
1028
1029 void S_ClearPrecache (void)
1030 {
1031 }
1032
1033
1034 void S_BeginPrecaching (void)
1035 {
1036 }
1037
1038
1039 void S_EndPrecaching (void)
1040 {
1041 }
1042
1043
1044 #define RAWSAMPLESBUFFER 32768
1045 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1046 int s_rawsamplesbuffer_start;
1047 int s_rawsamplesbuffer_count;
1048
1049 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1050 {
1051         int b2, b3;
1052         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1053         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1054                 return;
1055         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1056         if (b2 + length > RAWSAMPLESBUFFER)
1057         {
1058                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1059                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1060                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1061         }
1062         else
1063                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1064         s_rawsamplesbuffer_count += length;
1065 }
1066
1067 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1068 {
1069         int b1, b2, l;
1070         int i;
1071         short *in;
1072         int *out;
1073         int count;
1074         l = length;
1075         if (l > s_rawsamplesbuffer_count)
1076                 l = s_rawsamplesbuffer_count;
1077         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1078         if (b1 + l > RAWSAMPLESBUFFER)
1079         {
1080                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1081                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1082                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1083                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1084                         out[i] = in[i];
1085                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1086                         out[i] = in[i];
1087                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1088         }
1089         else
1090         {
1091                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1092                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1093                         out[i] = in[i];
1094                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1095         }
1096         if (l < (int)length)
1097         {
1098                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1099                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1100         }
1101         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1102         s_rawsamplesbuffer_count -= l;
1103 }
1104
1105 void S_RawSamples_ClearQueue(void)
1106 {
1107         s_rawsamplesbuffer_count = 0;
1108         s_rawsamplesbuffer_start = 0;
1109 }
1110
1111 int S_RawSamples_QueueWantsMore(void)
1112 {
1113         if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1114                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1115         else
1116                 return 0;
1117 }
1118
1119 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1120 {
1121         if (inputlength != outputlength)
1122         {
1123                 int i, position, stopposition, step;
1124                 short *in, *out;
1125                 step = (float) inputlength * 256.0f / (float) outputlength;
1126                 position = 0;
1127                 stopposition = (inputlength - 1) << 8;
1128                 out = output;
1129                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1130                 {
1131                         in = input + ((position >> 8) << 1);
1132                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1133                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1134                         out += 2;
1135                 }
1136                 stopposition = inputlength << 8;
1137                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1138                 {
1139                         in = input + ((position >> 8) << 1);
1140                         out[0] = in[0];
1141                         out[1] = in[2];
1142                         out += 2;
1143                 }
1144         }
1145         else
1146                 memcpy(output, input, inputlength * sizeof(short[2]));
1147 }
1148
1149 int S_RawSamples_SampleRate(void)
1150 {
1151         return shm != NULL ? shm->speed : 0;
1152 }