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