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