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