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