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_vieworigin;
  52 vec3_t listener_viewforward;
  53 vec3_t listener_viewleft;
  54 vec3_t listener_viewup;
  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_IsCached
 269
 270 =========
 271 */
 272 sfx_t *S_GetCached (const char *name)
 273 {
 274         int i;
 275
 276         if (!snd_initialized)
 277                 return NULL;
 278
 279         if (!name)
 280                 Host_Error("S_IsCached: NULL\n");
 281
 282         if (strlen(name) >= MAX_QPATH)
 283                 Host_Error("Sound name too long: %s", name);
 284
 285         for(i = 0;i < num_sfx;i++)
 286                 if(!strcmp(known_sfx[i].name, name))
 287                         return &known_sfx[i];
 288
 289         return NULL;
 290 }
 291
 292 /*
 293 ==================
 294 S_FindName
 295
 296 ==================
 297 */
 298 sfx_t *S_FindName (char *name)
 299 {
 300         int i;
 301         sfx_t *sfx;
 302
 303         if (!snd_initialized)
 304                 return NULL;
 305
 306         if (!name)
 307                 Host_Error("S_FindName: NULL\n");
 308
 309         if (strlen(name) >= MAX_QPATH)
 310                 Host_Error("Sound name too long: %s", name);
 311
 312 // see if already loaded
 313         for (i = 0;i < num_sfx;i++)
 314                 if (!strcmp(known_sfx[i].name, name))
 315                         return &known_sfx[i];
 316
 317         if (num_sfx == MAX_SFX)
 318                 Sys_Error("S_FindName: out of sfx_t");
 319
 320         sfx = &known_sfx[num_sfx++];
 321         memset(sfx, 0, sizeof(*sfx));
 322         snprintf(sfx->name, sizeof(sfx->name), "%s", name);
 323         return sfx;
 324 }
 325
 326
 327 /*
 328 ==================
 329 S_TouchSound
 330
 331 ==================
 332 */
 333 void S_TouchSound (char *name)
 334 {
 335         S_FindName(name);
 336 }
 337
 338 /*
 339 ==================
 340 S_PrecacheSound
 341
 342 ==================
 343 */
 344 sfx_t *S_PrecacheSound (char *name, int complain)
 345 {
 346         sfx_t *sfx;
 347
 348         if (!snd_initialized)
 349                 return NULL;
 350
 351         sfx = S_FindName(name);
 352
 353         if (!nosound.integer && snd_precache.integer)
 354                 S_LoadSound(sfx, complain);
 355
 356         return sfx;
 357 }
 358
 359
 360 //=============================================================================
 361
 362 /*
 363 =================
 364 SND_PickChannel
 365 =================
 366 */
 367 channel_t *SND_PickChannel(int entnum, int entchannel)
 368 {
 369         int ch_idx;
 370         int first_to_die;
 371         int life_left;
 372
 373 // Check for replacement sound, or find the best one to replace
 374         first_to_die = -1;
 375         life_left = 0x7fffffff;
 376         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 377         {
 378                 if (entchannel != 0             // channel 0 never overrides
 379                 && channels[ch_idx].entnum == entnum
 380                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 381                 {       // always override sound from same entity
 382                         first_to_die = ch_idx;
 383                         break;
 384                 }
 385
 386                 // don't let monster sounds override player sounds
 387                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 388                         continue;
 389
 390                 if (channels[ch_idx].end - paintedtime < life_left)
 391                 {
 392                         life_left = channels[ch_idx].end - paintedtime;
 393                         first_to_die = ch_idx;
 394                 }
 395         }
 396
 397         if (first_to_die == -1)
 398                 return NULL;
 399
 400         if (channels[first_to_die].sfx)
 401                 channels[first_to_die].sfx = NULL;
 402
 403         return &channels[first_to_die];
 404 }
 405
 406 /*
 407 =================
 408 SND_Spatialize
 409 =================
 410 */
 411 void SND_Spatialize(channel_t *ch, int isstatic)
 412 {
 413         vec_t dist, scale, pan;
 414         vec3_t source_vec;
 415
 416         // anything coming from the view entity will always be full volume
 417         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 418         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 419         {
 420                 ch->leftvol = ch->master_vol;
 421                 ch->rightvol = ch->master_vol;
 422         }
 423         else
 424         {
 425                 // update sound origin if we know about the entity
 426                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 427                 {
 428                         //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]);
 429                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 430                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 431                                 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);
 432                 }
 433
 434                 // calculate stereo seperation and distance attenuation
 435                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 436                 dist = VectorNormalizeLength(source_vec);
 437                 // distance
 438                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 439                 // panning
 440                 pan = scale * DotProduct(listener_viewleft, source_vec);
 441                 // calculate the volumes
 442                 ch->leftvol = (int) (scale + pan);
 443                 ch->rightvol = (int) (scale - pan);
 444         }
 445
 446         // LordHavoc: allow adjusting volume of static sounds
 447         if (isstatic)
 448         {
 449                 ch->leftvol *= snd_staticvolume.value;
 450                 ch->rightvol *= snd_staticvolume.value;
 451         }
 452
 453         // clamp volumes
 454         ch->leftvol = bound(0, ch->leftvol, 255);
 455         ch->rightvol = bound(0, ch->rightvol, 255);
 456 }
 457
 458
 459 // =======================================================================
 460 // Start a sound effect
 461 // =======================================================================
 462
 463 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 464 {
 465         channel_t *target_chan, *check;
 466         sfxcache_t      *sc;
 467         int             vol;
 468         int             ch_idx;
 469         int             skip;
 470
 471         if (!sound_started || !sfx || nosound.integer)
 472                 return;
 473
 474         vol = fvol*255;
 475
 476 // pick a channel to play on
 477         target_chan = SND_PickChannel(entnum, entchannel);
 478         if (!target_chan)
 479                 return;
 480
 481 // spatialize
 482         memset (target_chan, 0, sizeof(*target_chan));
 483         VectorCopy(origin, target_chan->origin);
 484         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 485         target_chan->master_vol = vol;
 486         target_chan->entnum = entnum;
 487         target_chan->entchannel = entchannel;
 488         SND_Spatialize(target_chan, false);
 489
 490         if (!target_chan->leftvol && !target_chan->rightvol)
 491                 return;         // not audible at all
 492
 493 // new channel
 494         sc = S_LoadSound (sfx, true);
 495         if (!sc)
 496         {
 497                 target_chan->sfx = NULL;
 498                 return;         // couldn't load the sound's data
 499         }
 500
 501         target_chan->sfx = sfx;
 502         target_chan->pos = 0.0;
 503         target_chan->end = paintedtime + sc->length;
 504
 505 // if an identical sound has also been started this frame, offset the pos
 506 // a bit to keep it from just making the first one louder
 507         check = &channels[NUM_AMBIENTS];
 508         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 509         {
 510                 if (check == target_chan)
 511                         continue;
 512                 if (check->sfx == sfx && !check->pos)
 513                 {
 514                         // LordHavoc: fixed skip calculations
 515                         skip = 0.1 * sc->speed;
 516                         if (skip > sc->length)
 517                                 skip = sc->length;
 518                         if (skip > 0)
 519                                 skip = rand() % skip;
 520                         target_chan->pos += skip;
 521                         target_chan->end -= skip;
 522                         break;
 523                 }
 524         }
 525 }
 526
 527 void S_StopSound(int entnum, int entchannel)
 528 {
 529         int i;
 530
 531         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 532         {
 533                 if (channels[i].entnum == entnum
 534                         && channels[i].entchannel == entchannel)
 535                 {
 536                         channels[i].end = 0;
 537                         channels[i].sfx = NULL;
 538                         return;
 539                 }
 540         }
 541 }
 542
 543 void S_StopAllSounds(qboolean clear)
 544 {
 545         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 546         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 547
 548         if (clear)
 549                 S_ClearBuffer();
 550 }
 551
 552 void S_StopAllSoundsC(void)
 553 {
 554         S_StopAllSounds(true);
 555 }
 556
 557 void S_ClearBuffer(void)
 558 {
 559         int             clear;
 560
 561         if (!sound_started || !shm)
 562                 return;
 563
 564         if (shm->samplebits == 8)
 565                 clear = 0x80;
 566         else
 567                 clear = 0;
 568
 569 #ifdef _WIN32
 570         if (pDSBuf)
 571         {
 572                 DWORD   dwSize;
 573                 DWORD   *pData;
 574                 int             reps;
 575                 HRESULT hresult;
 576
 577                 reps = 0;
 578
 579                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 580                 {
 581                         if (hresult != DSERR_BUFFERLOST)
 582                         {
 583                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 584                                 S_Shutdown ();
 585                                 return;
 586                         }
 587
 588                         if (++reps > 10000)
 589                         {
 590                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 591                                 S_Shutdown ();
 592                                 return;
 593                         }
 594                 }
 595
 596                 memset(pData, clear, shm->samples * shm->samplebits/8);
 597
 598                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 599
 600         }
 601         else
 602 #endif
 603         if (shm->buffer)
 604         {
 605                 int             setsize = shm->samples * shm->samplebits / 8;
 606                 char    *buf = shm->buffer;
 607
 608                 while (setsize--)
 609                         *buf++ = clear;
 610
 611 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 612 // reads the memory area before writing to it causing a seg fault
 613 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 614 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 615         }
 616 }
 617
 618
 619 /*
 620 =================
 621 S_StaticSound
 622 =================
 623 */
 624 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 625 {
 626         channel_t       *ss;
 627         sfxcache_t              *sc;
 628
 629         if (!sfx)
 630                 return;
 631
 632         if (total_channels == MAX_CHANNELS)
 633         {
 634                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 635                 return;
 636         }
 637
 638         sc = S_LoadSound (sfx, true);
 639         if (!sc)
 640                 return;
 641
 642         if (sc->loopstart == -1)
 643                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 644
 645         ss = &channels[total_channels++];
 646         memset(ss, 0, sizeof(*ss));
 647         ss->forceloop = true;
 648         ss->sfx = sfx;
 649         VectorCopy (origin, ss->origin);
 650         ss->master_vol = vol;
 651         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 652         ss->end = paintedtime + sc->length;
 653
 654         SND_Spatialize (ss, true);
 655 }
 656
 657
 658 //=============================================================================
 659
 660 /*
 661 ===================
 662 S_UpdateAmbientSounds
 663 ===================
 664 */
 665 void S_UpdateAmbientSounds (void)
 666 {
 667         float           vol;
 668         int                     ambient_channel;
 669         channel_t       *chan;
 670         qbyte           ambientlevels[NUM_AMBIENTS];
 671
 672         // LordHavoc: kill ambient sounds until proven otherwise
 673         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 674                 channels[ambient_channel].sfx = NULL;
 675
 676         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 677                 return;
 678
 679         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 680
 681 // calc ambient sound levels
 682         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 683         {
 684                 if (ambient_sfx[ambient_channel] && ambient_sfx[ambient_channel]->silentlymissing)
 685                         continue;
 686                 chan = &channels[ambient_channel];
 687                 chan->forceloop = true;
 688                 chan->sfx = ambient_sfx[ambient_channel];
 689
 690                 vol = ambient_level.value * ambientlevels[ambient_channel];
 691                 if (vol < 8)
 692                         vol = 0;
 693
 694         // don't adjust volume too fast
 695                 if (chan->master_vol < vol)
 696                 {
 697                         chan->master_vol += host_realframetime * ambient_fade.value;
 698                         if (chan->master_vol > vol)
 699                                 chan->master_vol = vol;
 700                 }
 701                 else if (chan->master_vol > vol)
 702                 {
 703                         chan->master_vol -= host_realframetime * ambient_fade.value;
 704                         if (chan->master_vol < vol)
 705                                 chan->master_vol = vol;
 706                 }
 707
 708                 chan->leftvol = chan->rightvol = chan->master_vol;
 709         }
 710 }
 711
 712
 713 /*
 714 ============
 715 S_Update
 716
 717 Called once each time through the main loop
 718 ============
 719 */
 720 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 721 {
 722         int                     i, j;
 723         int                     total;
 724         channel_t       *ch;
 725         channel_t       *combine;
 726
 727         if (!snd_initialized || (snd_blocked > 0))
 728                 return;
 729
 730         VectorCopy(origin, listener_vieworigin);
 731         VectorCopy(forward, listener_viewforward);
 732         VectorCopy(left, listener_viewleft);
 733         VectorCopy(up, listener_viewup);
 734
 735 // update general area ambient sound sources
 736         S_UpdateAmbientSounds ();
 737
 738         combine = NULL;
 739
 740 // update spatialization for static and dynamic sounds
 741         ch = channels+NUM_AMBIENTS;
 742         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 743         {
 744                 if (!ch->sfx)
 745                         continue;
 746                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 747                 if (!ch->leftvol && !ch->rightvol)
 748                         continue;
 749
 750         // try to combine static sounds with a previous channel of the same
 751         // sound effect so we don't mix five torches every frame
 752
 753                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 754                 {
 755                 // see if it can just use the last one
 756                         if (combine && combine->sfx == ch->sfx)
 757                         {
 758                                 combine->leftvol += ch->leftvol;
 759                                 combine->rightvol += ch->rightvol;
 760                                 ch->leftvol = ch->rightvol = 0;
 761                                 continue;
 762                         }
 763                 // search for one
 764                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 765                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 766                                 if (combine->sfx == ch->sfx)
 767                                         break;
 768
 769                         if (j == total_channels)
 770                                 combine = NULL;
 771                         else
 772                         {
 773                                 if (combine != ch)
 774                                 {
 775                                         combine->leftvol += ch->leftvol;
 776                                         combine->rightvol += ch->rightvol;
 777                                         ch->leftvol = ch->rightvol = 0;
 778                                 }
 779                                 continue;
 780                         }
 781                 }
 782         }
 783
 784 //
 785 // debugging output
 786 //
 787         if (snd_show.integer)
 788         {
 789                 total = 0;
 790                 ch = channels;
 791                 for (i=0 ; i<total_channels; i++, ch++)
 792                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 793                                 total++;
 794
 795                 Con_Printf ("----(%i)----\n", total);
 796         }
 797
 798 // mix some sound
 799         S_Update_();
 800 }
 801
 802 void GetSoundtime(void)
 803 {
 804         int             samplepos;
 805         static  int             buffers;
 806         static  int             oldsamplepos;
 807         int             fullsamples;
 808
 809         fullsamples = shm->samples / shm->channels;
 810
 811 // it is possible to miscount buffers if it has wrapped twice between
 812 // calls to S_Update.  Oh well.
 813 #ifdef __sun__
 814         soundtime = SNDDMA_GetSamples();
 815 #else
 816         samplepos = SNDDMA_GetDMAPos();
 817
 818
 819         if (samplepos < oldsamplepos)
 820         {
 821                 buffers++;                                      // buffer wrapped
 822
 823                 if (paintedtime > 0x40000000)
 824                 {       // time to chop things off to avoid 32 bit limits
 825                         buffers = 0;
 826                         paintedtime = fullsamples;
 827                         S_StopAllSounds (true);
 828                 }
 829         }
 830         oldsamplepos = samplepos;
 831
 832         soundtime = buffers*fullsamples + samplepos/shm->channels;
 833 #endif
 834 }
 835
 836 void IN_Accumulate (void);
 837
 838 void S_ExtraUpdate (void)
 839 {
 840
 841 #ifdef _WIN32
 842         IN_Accumulate ();
 843 #endif
 844
 845         if (snd_noextraupdate.integer)
 846                 return;         // don't pollute timings
 847         S_Update_();
 848 }
 849
 850 void S_Update_(void)
 851 {
 852         unsigned        endtime;
 853         int                             samps;
 854
 855         if (!sound_started || (snd_blocked > 0))
 856                 return;
 857
 858 // Updates DMA time
 859         GetSoundtime();
 860
 861 // check to make sure that we haven't overshot
 862         if (paintedtime < soundtime)
 863                 paintedtime = soundtime;
 864
 865 // mix ahead of current position
 866         endtime = soundtime + _snd_mixahead.value * shm->speed;
 867         samps = shm->samples >> (shm->channels-1);
 868         if (endtime > (unsigned int)(soundtime + samps))
 869                 endtime = soundtime + samps;
 870
 871 #ifdef _WIN32
 872 // if the buffer was lost or stopped, restore it and/or restart it
 873         {
 874                 DWORD   dwStatus;
 875
 876                 if (pDSBuf)
 877                 {
 878                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 879                                 Con_Printf ("Couldn't get sound buffer status\n");
 880
 881                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 882                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 883
 884                         if (!(dwStatus & DSBSTATUS_PLAYING))
 885                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 886                 }
 887         }
 888 #endif
 889
 890         S_PaintChannels (endtime);
 891
 892         SNDDMA_Submit ();
 893 }
 894
 895 /*
 896 ===============================================================================
 897
 898 console functions
 899
 900 ===============================================================================
 901 */
 902
 903 static void S_Play_Common(float fvol, float attenuation)
 904 {
 905         int     i;
 906         char name[256];
 907         sfx_t   *sfx;
 908
 909         i = 1;
 910         while (i<Cmd_Argc())
 911         {
 912                 if (!strrchr(Cmd_Argv(i), '.'))
 913                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
 914                 else
 915                         strlcpy(name, Cmd_Argv(i), sizeof(name));
 916                 sfx = S_PrecacheSound(name, true);
 917
 918                 // If we need to get the volume from the command line
 919                 if (fvol == -1.0f)
 920                 {
 921                         fvol = atof(Cmd_Argv(i+1));
 922                         i += 2;
 923                 }
 924                 else
 925                         i++;
 926
 927                 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
 928         }
 929 }
 930
 931 void S_Play(void)
 932 {
 933         S_Play_Common (1.0f, 1.0f);
 934 }
 935
 936 void S_Play2(void)
 937 {
 938         S_Play_Common (1.0f, 0.0f);
 939 }
 940
 941 void S_PlayVol(void)
 942 {
 943         S_Play_Common (-1.0f, 0.0f);
 944 }
 945
 946 void S_SoundList(void)
 947 {
 948         int             i;
 949         sfx_t   *sfx;
 950         sfxcache_t      *sc;
 951         int             size, total;
 952
 953         total = 0;
 954         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 955         {
 956                 sc = sfx->sfxcache;
 957                 if (sc)
 958                 {
 959                         size = sc->length*sc->width*(sc->stereo+1);
 960                         total += size;
 961                         Con_Printf("%c(%2db) %6i : %s\n", sc->loopstart >= 0 ? 'L' : ' ',sc->width*8,  size, sfx->name);
 962                 }
 963         }
 964         Con_Printf("Total resident: %i\n", total);
 965 }
 966
 967
 968 void S_LocalSound (char *sound)
 969 {
 970         sfx_t   *sfx;
 971
 972         if (!snd_initialized || nosound.integer)
 973                 return;
 974
 975         sfx = S_PrecacheSound (sound, true);
 976         if (!sfx)
 977         {
 978                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
 979                 return;
 980         }
 981         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
 982 }
 983
 984
 985 void S_ClearPrecache (void)
 986 {
 987 }
 988
 989
 990 void S_BeginPrecaching (void)
 991 {
 992 }
 993
 994
 995 void S_EndPrecaching (void)
 996 {
 997 }
 998
 999
1000 #define RAWSAMPLESBUFFER 32768
1001 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1002 int s_rawsamplesbuffer_start;
1003 int s_rawsamplesbuffer_count;
1004
1005 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1006 {
1007         int b2, b3;
1008         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1009         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1010                 return;
1011         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1012         if (b2 + length > RAWSAMPLESBUFFER)
1013         {
1014                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1015                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1016                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1017         }
1018         else
1019                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1020         s_rawsamplesbuffer_count += length;
1021 }
1022
1023 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1024 {
1025         int b1, b2, l;
1026         int i;
1027         short *in;
1028         int *out;
1029         int count;
1030         l = length;
1031         if (l > s_rawsamplesbuffer_count)
1032                 l = s_rawsamplesbuffer_count;
1033         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1034         if (b1 + l > RAWSAMPLESBUFFER)
1035         {
1036                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1037                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1038                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1039                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1040                         out[i] = in[i];
1041                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1042                         out[i] = in[i];
1043                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1044         }
1045         else
1046         {
1047                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1048                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1049                         out[i] = in[i];
1050                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1051         }
1052         if (l < (int)length)
1053         {
1054                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1055                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1056         }
1057         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1058         s_rawsamplesbuffer_count -= l;
1059 }
1060
1061 void S_RawSamples_ClearQueue(void)
1062 {
1063         s_rawsamplesbuffer_count = 0;
1064         s_rawsamplesbuffer_start = 0;
1065 }
1066
1067 int S_RawSamples_QueueWantsMore(void)
1068 {
1069         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1070                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1071         else
1072                 return 0;
1073 }
1074
1075 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1076 {
1077         if (inputlength != outputlength)
1078         {
1079                 int i, position, stopposition, step;
1080                 short *in, *out;
1081                 step = (float) inputlength * 256.0f / (float) outputlength;
1082                 position = 0;
1083                 stopposition = (inputlength - 1) << 8;
1084                 out = output;
1085                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1086                 {
1087                         in = input + ((position >> 8) << 1);
1088                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1089                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1090                         out += 2;
1091                 }
1092                 stopposition = inputlength << 8;
1093                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1094                 {
1095                         in = input + ((position >> 8) << 1);
1096                         out[0] = in[0];
1097                         out[1] = in[2];
1098                         out += 2;
1099                 }
1100         }
1101         else
1102                 memcpy(output, input, inputlength * sizeof(short[2]));
1103 }
1104
1105 int S_RawSamples_SampleRate(void)
1106 {
1107         return shm != NULL ? shm->speed : 0;
1108 }
1109