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                 // calculate stereo seperation and distance attenuation
 407                 snd = ch->sfx;
 408                 VectorSubtract(ch->origin, listener_origin, source_vec);
 409
 410                 dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 411
 412                 dot = DotProduct(listener_right, source_vec);
 413
 414                 if (shm->channels == 1)
 415                 {
 416                         rscale = 1.0;
 417                         lscale = 1.0;
 418                 }
 419                 else
 420                 {
 421                         rscale = 1.0 + dot;
 422                         lscale = 1.0 - dot;
 423                 }
 424
 425         // add in distance effect
 426                 scale = (1.0 - dist) * rscale;
 427                 ch->rightvol = (int) (ch->master_vol * scale);
 428                 if (ch->rightvol < 0)
 429                         ch->rightvol = 0;
 430
 431                 scale = (1.0 - dist) * lscale;
 432                 ch->leftvol = (int) (ch->master_vol * scale);
 433                 if (ch->leftvol < 0)
 434                         ch->leftvol = 0;
 435         }
 436         // LordHavoc: allow adjusting volume of static sounds
 437         if (isstatic)
 438         {
 439                 ch->leftvol *= snd_staticvolume.value;
 440                 ch->rightvol *= snd_staticvolume.value;
 441         }
 442 }
 443
 444
 445 // =======================================================================
 446 // Start a sound effect
 447 // =======================================================================
 448
 449 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 450 {
 451         channel_t *target_chan, *check;
 452         sfxcache_t      *sc;
 453         int             vol;
 454         int             ch_idx;
 455         int             skip;
 456
 457         if (!sound_started)
 458                 return;
 459
 460         if (!sfx)
 461                 return;
 462
 463         if (nosound.integer)
 464                 return;
 465
 466         vol = fvol*255;
 467
 468 // pick a channel to play on
 469         target_chan = SND_PickChannel(entnum, entchannel);
 470         if (!target_chan)
 471                 return;
 472
 473 // spatialize
 474         memset (target_chan, 0, sizeof(*target_chan));
 475         VectorCopy(origin, target_chan->origin);
 476         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 477         target_chan->master_vol = vol;
 478         target_chan->entnum = entnum;
 479         target_chan->entchannel = entchannel;
 480         SND_Spatialize(target_chan);
 481
 482         if (!target_chan->leftvol && !target_chan->rightvol)
 483                 return;         // not audible at all
 484
 485 // new channel
 486         sc = S_LoadSound (sfx, true);
 487         if (!sc)
 488         {
 489                 target_chan->sfx = NULL;
 490                 return;         // couldn't load the sound's data
 491         }
 492
 493         target_chan->sfx = sfx;
 494         target_chan->pos = 0.0;
 495         target_chan->end = paintedtime + sc->length;
 496
 497 // if an identical sound has also been started this frame, offset the pos
 498 // a bit to keep it from just making the first one louder
 499         check = &channels[NUM_AMBIENTS];
 500         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 501         {
 502                 if (check == target_chan)
 503                         continue;
 504                 if (check->sfx == sfx && !check->pos)
 505                 {
 506                         // LordHavoc: fixed skip calculations
 507                         skip = 0.1 * shm->speed;
 508                         if (skip > sc->length)
 509                                 skip = sc->length;
 510                         if (skip > 0)
 511                                 skip = rand() % skip;
 512                         target_chan->pos += skip;
 513                         target_chan->end -= skip;
 514                         break;
 515                 }
 516
 517         }
 518 }
 519
 520 void S_StopSound(int entnum, int entchannel)
 521 {
 522         int i;
 523
 524         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 525         {
 526                 if (channels[i].entnum == entnum
 527                         && channels[i].entchannel == entchannel)
 528                 {
 529                         channels[i].end = 0;
 530                         channels[i].sfx = NULL;
 531                         return;
 532                 }
 533         }
 534 }
 535
 536 void S_StopAllSounds(qboolean clear)
 537 {
 538         int             i;
 539
 540         if (!sound_started)
 541                 return;
 542
 543         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 544
 545         for (i=0 ; i<MAX_CHANNELS ; i++)
 546                 if (channels[i].sfx)
 547                         channels[i].sfx = NULL;
 548
 549         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 550
 551         if (clear)
 552                 S_ClearBuffer ();
 553 }
 554
 555 void S_StopAllSoundsC (void)
 556 {
 557         S_StopAllSounds (true);
 558 }
 559
 560 void S_ClearBuffer (void)
 561 {
 562         int             clear;
 563
 564 #ifdef _WIN32
 565         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 566 #else
 567         if (!sound_started || !shm || !shm->buffer)
 568 #endif
 569                 return;
 570
 571         if (shm->samplebits == 8)
 572                 clear = 0x80;
 573         else
 574                 clear = 0;
 575
 576 #ifdef _WIN32
 577         if (pDSBuf)
 578         {
 579                 DWORD   dwSize;
 580                 DWORD   *pData;
 581                 int             reps;
 582                 HRESULT hresult;
 583
 584                 reps = 0;
 585
 586                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 587                 {
 588                         if (hresult != DSERR_BUFFERLOST)
 589                         {
 590                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 591                                 S_Shutdown ();
 592                                 return;
 593                         }
 594
 595                         if (++reps > 10000)
 596                         {
 597                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 598                                 S_Shutdown ();
 599                                 return;
 600                         }
 601                 }
 602
 603                 memset(pData, clear, shm->samples * shm->samplebits/8);
 604
 605                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 606
 607         }
 608         else
 609 #endif
 610         {
 611                 int             setsize = shm->samples * shm->samplebits / 8;
 612                 char    *buf = shm->buffer;
 613
 614                 while (setsize--)
 615                         *buf++ = 0;
 616
 617 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 618 // reads the memory area before writing to it causing a seg fault
 619 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 620 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 621         }
 622 }
 623
 624
 625 /*
 626 =================
 627 S_StaticSound
 628 =================
 629 */
 630 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 631 {
 632         channel_t       *ss;
 633         sfxcache_t              *sc;
 634
 635         if (!sfx)
 636                 return;
 637
 638         if (total_channels == MAX_CHANNELS)
 639         {
 640                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 641                 return;
 642         }
 643
 644         ss = &channels[total_channels];
 645         total_channels++;
 646
 647         sc = S_LoadSound (sfx, true);
 648         if (!sc)
 649                 return;
 650
 651         if (sc->loopstart == -1)
 652         {
 653                 Con_Printf ("Sound %s not looped\n", sfx->name);
 654                 return;
 655         }
 656
 657         ss->sfx = sfx;
 658         VectorCopy (origin, ss->origin);
 659         ss->master_vol = vol;
 660         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 661         ss->end = paintedtime + sc->length;
 662
 663         SND_Spatialize (ss);
 664 }
 665
 666
 667 //=============================================================================
 668
 669 /*
 670 ===================
 671 S_UpdateAmbientSounds
 672 ===================
 673 */
 674 void S_UpdateAmbientSounds (void)
 675 {
 676         mleaf_t         *l;
 677         float           vol;
 678         int                     ambient_channel;
 679         channel_t       *chan;
 680
 681         // LordHavoc: kill ambient sounds until proven otherwise
 682         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 683                 channels[ambient_channel].sfx = NULL;
 684
 685         if (!snd_ambient || !cl.worldmodel || ambient_level.value <= 0)
 686                 return;
 687
 688         l = cl.worldmodel->PointInLeaf(cl.worldmodel, listener_origin);
 689         if (!l)
 690                 return;
 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->sfx = ambient_sfx[ambient_channel];
 699
 700                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 701                 if (vol < 8)
 702                         vol = 0;
 703
 704         // don't adjust volume too fast
 705                 if (chan->master_vol < vol)
 706                 {
 707                         chan->master_vol += host_realframetime * ambient_fade.value;
 708                         if (chan->master_vol > vol)
 709                                 chan->master_vol = vol;
 710                 }
 711                 else if (chan->master_vol > vol)
 712                 {
 713                         chan->master_vol -= host_realframetime * ambient_fade.value;
 714                         if (chan->master_vol < vol)
 715                                 chan->master_vol = vol;
 716                 }
 717
 718                 chan->leftvol = chan->rightvol = chan->master_vol;
 719         }
 720 }
 721
 722
 723 /*
 724 ============
 725 S_Update
 726
 727 Called once each time through the main loop
 728 ============
 729 */
 730 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 731 {
 732         int                     i, j;
 733         int                     total;
 734         channel_t       *ch;
 735         channel_t       *combine;
 736
 737         if (!sound_started || (snd_blocked > 0))
 738                 return;
 739
 740         VectorCopy(origin, listener_origin);
 741         VectorCopy(forward, listener_forward);
 742         VectorCopy(right, listener_right);
 743         VectorCopy(up, listener_up);
 744
 745 // update general area ambient sound sources
 746         S_UpdateAmbientSounds ();
 747
 748         combine = NULL;
 749
 750 // update spatialization for static and dynamic sounds
 751         ch = channels+NUM_AMBIENTS;
 752         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 753         {
 754                 if (!ch->sfx)
 755                         continue;
 756                 SND_Spatialize(ch, i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 757                 if (!ch->leftvol && !ch->rightvol)
 758                         continue;
 759
 760         // try to combine static sounds with a previous channel of the same
 761         // sound effect so we don't mix five torches every frame
 762
 763                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 764                 {
 765                 // see if it can just use the last one
 766                         if (combine && combine->sfx == ch->sfx)
 767                         {
 768                                 combine->leftvol += ch->leftvol;
 769                                 combine->rightvol += ch->rightvol;
 770                                 ch->leftvol = ch->rightvol = 0;
 771                                 continue;
 772                         }
 773                 // search for one
 774                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 775                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 776                                 if (combine->sfx == ch->sfx)
 777                                         break;
 778
 779                         if (j == total_channels)
 780                         {
 781                                 combine = NULL;
 782                         }
 783                         else
 784                         {
 785                                 if (combine != ch)
 786                                 {
 787                                         combine->leftvol += ch->leftvol;
 788                                         combine->rightvol += ch->rightvol;
 789                                         ch->leftvol = ch->rightvol = 0;
 790                                 }
 791                                 continue;
 792                         }
 793                 }
 794         }
 795
 796 //
 797 // debugging output
 798 //
 799         if (snd_show.integer)
 800         {
 801                 total = 0;
 802                 ch = channels;
 803                 for (i=0 ; i<total_channels; i++, ch++)
 804                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 805                                 total++;
 806
 807                 Con_Printf ("----(%i)----\n", total);
 808         }
 809
 810 // mix some sound
 811         S_Update_();
 812 }
 813
 814 void GetSoundtime(void)
 815 {
 816         int             samplepos;
 817         static  int             buffers;
 818         static  int             oldsamplepos;
 819         int             fullsamples;
 820
 821         fullsamples = shm->samples / shm->channels;
 822
 823 // it is possible to miscount buffers if it has wrapped twice between
 824 // calls to S_Update.  Oh well.
 825 #ifdef __sun__
 826         soundtime = SNDDMA_GetSamples();
 827 #else
 828         samplepos = SNDDMA_GetDMAPos();
 829
 830
 831         if (samplepos < oldsamplepos)
 832         {
 833                 buffers++;                                      // buffer wrapped
 834
 835                 if (paintedtime > 0x40000000)
 836                 {       // time to chop things off to avoid 32 bit limits
 837                         buffers = 0;
 838                         paintedtime = fullsamples;
 839                         S_StopAllSounds (true);
 840                 }
 841         }
 842         oldsamplepos = samplepos;
 843
 844         soundtime = buffers*fullsamples + samplepos/shm->channels;
 845 #endif
 846 }
 847
 848 void IN_Accumulate (void);
 849
 850 void S_ExtraUpdate (void)
 851 {
 852
 853 #ifdef _WIN32
 854         IN_Accumulate ();
 855 #endif
 856
 857         if (snd_noextraupdate.integer)
 858                 return;         // don't pollute timings
 859         S_Update_();
 860 }
 861
 862 void S_Update_(void)
 863 {
 864         unsigned        endtime;
 865         int                             samps;
 866
 867         if (!sound_started || (snd_blocked > 0))
 868                 return;
 869
 870 // Updates DMA time
 871         GetSoundtime();
 872
 873 // check to make sure that we haven't overshot
 874         if (paintedtime < soundtime)
 875                 paintedtime = soundtime;
 876
 877 // mix ahead of current position
 878         endtime = soundtime + _snd_mixahead.value * shm->speed;
 879         samps = shm->samples >> (shm->channels-1);
 880         if (endtime > (unsigned int)(soundtime + samps))
 881                 endtime = soundtime + samps;
 882
 883 #ifdef _WIN32
 884 // if the buffer was lost or stopped, restore it and/or restart it
 885         {
 886                 DWORD   dwStatus;
 887
 888                 if (pDSBuf)
 889                 {
 890                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 891                                 Con_Printf ("Couldn't get sound buffer status\n");
 892
 893                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 894                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 895
 896                         if (!(dwStatus & DSBSTATUS_PLAYING))
 897                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 898                 }
 899         }
 900 #endif
 901
 902         S_PaintChannels (endtime);
 903
 904         SNDDMA_Submit ();
 905 }
 906
 907 /*
 908 ===============================================================================
 909
 910 console functions
 911
 912 ===============================================================================
 913 */
 914
 915 void S_Play(void)
 916 {
 917         static int hash=345;
 918         int     i;
 919         char name[256];
 920         sfx_t   *sfx;
 921
 922         i = 1;
 923         while (i<Cmd_Argc())
 924         {
 925                 if (!strrchr(Cmd_Argv(i), '.'))
 926                 {
 927                         strcpy(name, Cmd_Argv(i));
 928                         strcat(name, ".wav");
 929                 }
 930                 else
 931                         strcpy(name, Cmd_Argv(i));
 932                 sfx = S_PrecacheSound(name, true);
 933                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0);
 934                 i++;
 935         }
 936 }
 937
 938 void S_Play2(void)
 939 {
 940         static int hash=345;
 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(hash++, 0, sfx, listener_origin, 1.0, 0.0);
 957                 i++;
 958         }
 959 }
 960
 961 void S_PlayVol(void)
 962 {
 963         static int hash=543;
 964         int i;
 965         float vol;
 966         char name[256];
 967         sfx_t   *sfx;
 968
 969         i = 1;
 970         while (i<Cmd_Argc())
 971         {
 972                 if (!strrchr(Cmd_Argv(i), '.'))
 973                 {
 974                         strcpy(name, Cmd_Argv(i));
 975                         strcat(name, ".wav");
 976                 }
 977                 else
 978                         strcpy(name, Cmd_Argv(i));
 979                 sfx = S_PrecacheSound(name, true);
 980                 vol = atof(Cmd_Argv(i+1));
 981                 S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0);
 982                 i+=2;
 983         }
 984 }
 985
 986 void S_SoundList(void)
 987 {
 988         int             i;
 989         sfx_t   *sfx;
 990         sfxcache_t      *sc;
 991         int             size, total;
 992
 993         total = 0;
 994         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 995         {
 996                 sc = sfx->sfxcache;
 997                 if (!sc)
 998                         continue;
 999                 size = sc->length*sc->width*(sc->stereo+1);
1000                 total += size;
1001                 if (sc->loopstart >= 0)
1002                         Con_Printf ("L");
1003                 else
1004                         Con_Printf (" ");
1005                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
1006         }
1007         Con_Printf ("Total resident: %i\n", total);
1008 }
1009
1010
1011 void S_LocalSound (char *sound)
1012 {
1013         sfx_t   *sfx;
1014
1015         if (nosound.integer)
1016                 return;
1017         if (!sound_started)
1018                 return;
1019
1020         sfx = S_PrecacheSound (sound, true);
1021         if (!sfx)
1022         {
1023                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1024                 return;
1025         }
1026         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1027 }
1028
1029
1030 void S_ClearPrecache (void)
1031 {
1032 }
1033
1034
1035 void S_BeginPrecaching (void)
1036 {
1037 }
1038
1039
1040 void S_EndPrecaching (void)
1041 {
1042 }
1043
1044
1045 #define RAWSAMPLESBUFFER 32768
1046 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1047 int s_rawsamplesbuffer_start;
1048 int s_rawsamplesbuffer_count;
1049
1050 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1051 {
1052         int b2, b3;
1053         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1054         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1055                 return;
1056         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1057         if (b2 + length > RAWSAMPLESBUFFER)
1058         {
1059                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1060                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1061                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1062         }
1063         else
1064                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1065         s_rawsamplesbuffer_count += length;
1066 }
1067
1068 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1069 {
1070         int b1, b2, l;
1071         int i;
1072         short *in;
1073         int *out;
1074         int count;
1075         l = length;
1076         if (l > s_rawsamplesbuffer_count)
1077                 l = s_rawsamplesbuffer_count;
1078         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1079         if (b1 + l > RAWSAMPLESBUFFER)
1080         {
1081                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1082                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1083                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1084                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1085                         out[i] = in[i];
1086                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1087                         out[i] = in[i];
1088                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1089         }
1090         else
1091         {
1092                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1093                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1094                         out[i] = in[i];
1095                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1096         }
1097         if (l < (int)length)
1098         {
1099                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1100                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1101         }
1102         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1103         s_rawsamplesbuffer_count -= l;
1104 }
1105
1106 void S_RawSamples_ClearQueue(void)
1107 {
1108         s_rawsamplesbuffer_count = 0;
1109         s_rawsamplesbuffer_start = 0;
1110 }
1111
1112 int S_RawSamples_QueueWantsMore(void)
1113 {
1114         if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1115                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1116         else
1117                 return 0;
1118 }
1119
1120 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1121 {
1122         if (inputlength != outputlength)
1123         {
1124                 int i, position, stopposition, step;
1125                 short *in, *out;
1126                 step = (float) inputlength * 256.0f / (float) outputlength;
1127                 position = 0;
1128                 stopposition = (inputlength - 1) << 8;
1129                 out = output;
1130                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1131                 {
1132                         in = input + ((position >> 8) << 1);
1133                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1134                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1135                         out += 2;
1136                 }
1137                 stopposition = inputlength << 8;
1138                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1139                 {
1140                         in = input + ((position >> 8) << 1);
1141                         out[0] = in[0];
1142                         out[1] = in[2];
1143                         out += 2;
1144                 }
1145         }
1146         else
1147                 memcpy(output, input, inputlength * sizeof(short[2]));
1148 }
1149
1150 int S_RawSamples_SampleRate(void)
1151 {
1152         return shm != NULL ? shm->speed : 0;
1153 }