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 <windows.h>
  26 #include <dsound.h>
  27 extern DWORD gSndBufSize;
  28 extern LPDIRECTSOUND pDS;
  29 extern LPDIRECTSOUNDBUFFER pDSBuf;
  30 #endif
  31
  32 #include "snd_ogg.h"
  33
  34
  35 void S_Play(void);
  36 void S_PlayVol(void);
  37 void S_Play2(void);
  38 void S_SoundList(void);
  39 void S_Update_();
  40 void S_StopAllSounds(qboolean clear);
  41 void S_StopAllSoundsC(void);
  42
  43 // =======================================================================
  44 // Internal sound data & structures
  45 // =======================================================================
  46
  47 channel_t channels[MAX_CHANNELS];
  48 unsigned int total_channels;
  49
  50 int snd_blocked = 0;
  51 static qboolean snd_ambient = 1;
  52 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
  53 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1"};
  54
  55 // pointer should go away
  56 volatile dma_t *shm = 0;
  57 volatile dma_t sn;
  58
  59 vec3_t listener_vieworigin;
  60 vec3_t listener_viewforward;
  61 vec3_t listener_viewleft;
  62 vec3_t listener_viewup;
  63 vec_t sound_nominal_clip_dist=1000.0;
  64 mempool_t *snd_mempool;
  65
  66 // sample PAIRS
  67 int soundtime;
  68 int paintedtime;
  69
  70
  71 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  72 #define MAX_SFX 4096
  73 sfx_t *known_sfx; // allocated [MAX_SFX]
  74 int num_sfx;
  75
  76 sfx_t *ambient_sfx[NUM_AMBIENTS];
  77
  78 int sound_started = 0;
  79
  80 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  81 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  82 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  83
  84 cvar_t nosound = {0, "nosound", "0"};
  85 cvar_t snd_precache = {0, "snd_precache", "1"};
  86 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  87 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  88 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  89 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  90 cvar_t snd_show = {0, "snd_show", "0"};
  91 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  92 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  93
  94
  95 // ====================================================================
  96 // User-setable variables
  97 // ====================================================================
  98
  99
 100 //
 101 // Fake dma is a synchronous faking of the DMA progress used for
 102 // isolating performance in the renderer.  The fakedma_updates is
 103 // number of times S_Update() is called per second.
 104 //
 105
 106 qboolean fakedma = false;
 107 int fakedma_updates = 15;
 108
 109
 110 void S_AmbientOff (void)
 111 {
 112         snd_ambient = false;
 113 }
 114
 115
 116 void S_AmbientOn (void)
 117 {
 118         snd_ambient = true;
 119 }
 120
 121
 122 void S_SoundInfo_f(void)
 123 {
 124         if (!sound_started || !shm)
 125         {
 126                 Con_Print("sound system not started\n");
 127                 return;
 128         }
 129
 130         Con_Printf("%5d stereo\n", shm->format.channels - 1);
 131         Con_Printf("%5d samples\n", shm->samples);
 132         Con_Printf("%5d samplepos\n", shm->samplepos);
 133         Con_Printf("%5d samplebits\n", shm->format.width * 8);
 134         Con_Printf("%5d speed\n", shm->format.speed);
 135         Con_Printf("0x%x dma buffer\n", shm->buffer);
 136         Con_Printf("%5u total_channels\n", total_channels);
 137 }
 138
 139 void S_UnloadSounds(void)
 140 {
 141         int i;
 142         for (i = 0;i < num_sfx;i++)
 143                 S_UnloadSound(known_sfx + i);
 144 }
 145
 146 void S_LoadSounds(void)
 147 {
 148         int i;
 149         for (i = 0;i < num_sfx;i++)
 150                 S_LoadSound(known_sfx + i, false);
 151 }
 152
 153 void S_Startup(void)
 154 {
 155         if (!snd_initialized.integer)
 156                 return;
 157
 158         shm = &sn;
 159         memset((void *)shm, 0, sizeof(*shm));
 160
 161 // create a piece of DMA memory
 162
 163         if (fakedma)
 164         {
 165                 shm->format.width = 2;
 166                 shm->format.speed = 22050;
 167                 shm->format.channels = 2;
 168                 shm->samples = 32768;
 169                 shm->samplepos = 0;
 170                 shm->buffer = Mem_Alloc(snd_mempool, shm->format.channels * shm->samples * shm->format.width);
 171         }
 172         else
 173         {
 174                 if (!SNDDMA_Init())
 175                 {
 176                         Con_Print("S_Startup: SNDDMA_Init failed.\n");
 177                         sound_started = 0;
 178                         shm = NULL;
 179                         return;
 180                 }
 181         }
 182
 183         sound_started = 1;
 184
 185         Con_DPrintf("Sound sampling rate: %i\n", shm->format.speed);
 186
 187         //S_LoadSounds();
 188
 189         S_StopAllSounds(true);
 190 }
 191
 192 void S_Shutdown(void)
 193 {
 194         if (!sound_started)
 195                 return;
 196
 197         //S_UnloadSounds();
 198
 199         if (fakedma)
 200                 Mem_Free(shm->buffer);
 201         else
 202                 SNDDMA_Shutdown();
 203
 204         shm = NULL;
 205         sound_started = 0;
 206 }
 207
 208 void S_Restart_f(void)
 209 {
 210         S_Shutdown();
 211         S_Startup();
 212 }
 213
 214 /*
 215 ================
 216 S_Init
 217 ================
 218 */
 219 void S_Init(void)
 220 {
 221         Con_DPrint("\nSound Initialization\n");
 222
 223         S_RawSamples_ClearQueue();
 224
 225         Cvar_RegisterVariable(&volume);
 226         Cvar_RegisterVariable(&bgmvolume);
 227         Cvar_RegisterVariable(&snd_staticvolume);
 228
 229         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 230                 return;
 231
 232         snd_mempool = Mem_AllocPool("sound");
 233
 234         if (COM_CheckParm("-simsound"))
 235                 fakedma = true;
 236
 237         Cmd_AddCommand("play", S_Play);
 238         Cmd_AddCommand("play2", S_Play2);
 239         Cmd_AddCommand("playvol", S_PlayVol);
 240         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 241         Cmd_AddCommand("soundlist", S_SoundList);
 242         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 243         Cmd_AddCommand("snd_restart", S_Restart_f);
 244
 245         Cvar_RegisterVariable(&nosound);
 246         Cvar_RegisterVariable(&snd_precache);
 247         Cvar_RegisterVariable(&snd_initialized);
 248         Cvar_RegisterVariable(&snd_streaming);
 249         Cvar_RegisterVariable(&bgmbuffer);
 250         Cvar_RegisterVariable(&ambient_level);
 251         Cvar_RegisterVariable(&ambient_fade);
 252         Cvar_RegisterVariable(&snd_noextraupdate);
 253         Cvar_RegisterVariable(&snd_show);
 254         Cvar_RegisterVariable(&_snd_mixahead);
 255         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 256
 257         Cvar_SetValueQuick(&snd_initialized, true);
 258
 259         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 260         num_sfx = 0;
 261
 262         SND_InitScaletable ();
 263
 264         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 265         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 266
 267         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 268         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 269
 270         OGG_OpenLibrary ();
 271 }
 272
 273
 274 // =======================================================================
 275 // Load a sound
 276 // =======================================================================
 277
 278 /*
 279 =========
 280 S_GetCached
 281
 282 =========
 283 */
 284 sfx_t *S_GetCached (const char *name)
 285 {
 286         int i;
 287
 288         if (!snd_initialized.integer)
 289                 return NULL;
 290
 291         if (!name)
 292                 Host_Error("S_IsCached: NULL\n");
 293
 294         if (strlen(name) >= MAX_QPATH)
 295                 Host_Error("Sound name too long: %s", name);
 296
 297         for(i = 0;i < num_sfx;i++)
 298                 if(!strcmp(known_sfx[i].name, name))
 299                         return &known_sfx[i];
 300
 301         return NULL;
 302 }
 303
 304 /*
 305 ==================
 306 S_FindName
 307
 308 ==================
 309 */
 310 sfx_t *S_FindName (char *name)
 311 {
 312         int i;
 313         sfx_t *sfx;
 314
 315         if (!snd_initialized.integer)
 316                 return NULL;
 317
 318         if (!name)
 319                 Host_Error("S_FindName: NULL\n");
 320
 321         if (strlen(name) >= MAX_QPATH)
 322                 Host_Error("Sound name too long: %s", name);
 323
 324 // see if already loaded
 325         for (i = 0;i < num_sfx;i++)
 326                 if (!strcmp(known_sfx[i].name, name))
 327                         return &known_sfx[i];
 328
 329         if (num_sfx == MAX_SFX)
 330                 Sys_Error("S_FindName: out of sfx_t");
 331
 332         sfx = &known_sfx[num_sfx++];
 333         memset(sfx, 0, sizeof(*sfx));
 334         strncpy(sfx->name, name, sizeof(sfx->name));
 335         return sfx;
 336 }
 337
 338
 339 /*
 340 ==================
 341 S_TouchSound
 342
 343 ==================
 344 */
 345 void S_TouchSound (char *name)
 346 {
 347         sfx_t *sfx;
 348
 349         sfx = S_FindName (name);
 350
 351         // Set the "used" flag for this sound
 352         if (sfx != NULL)
 353                 sfx->flags |= SFXFLAG_USED;
 354 }
 355
 356
 357 /*
 358 ==================
 359 S_ClearUsed
 360
 361 Reset the "used" flag of all precached sounds
 362 ==================
 363 */
 364 void S_ClearUsed (void)
 365 {
 366         int i;
 367
 368         for (i = 0; i < num_sfx; i++)
 369                 known_sfx[i].flags &= ~SFXFLAG_USED;
 370 }
 371
 372
 373 /*
 374 ==================
 375 S_PurgeUnused
 376
 377 Free all precached sounds without the "used" flag
 378 ==================
 379 */
 380 void S_PurgeUnused (void)
 381 {
 382         int i;
 383         sfx_t *sfx;
 384
 385         for (i = 0; i < num_sfx; i++)
 386         {
 387                 sfx = &known_sfx[i];
 388                 if (! (sfx->flags & SFXFLAG_USED))
 389                         S_UnloadSound (sfx);
 390         }
 391 }
 392
 393
 394 /*
 395 ==================
 396 S_PrecacheSound
 397
 398 ==================
 399 */
 400 sfx_t *S_PrecacheSound (char *name, int complain)
 401 {
 402         sfx_t *sfx;
 403
 404         if (!snd_initialized.integer)
 405                 return NULL;
 406
 407         sfx = S_FindName(name);
 408
 409         if (!nosound.integer && snd_precache.integer)
 410                 S_LoadSound(sfx, complain);
 411
 412         return sfx;
 413 }
 414
 415
 416 //=============================================================================
 417
 418 /*
 419 =================
 420 SND_PickChannel
 421 =================
 422 */
 423 channel_t *SND_PickChannel(int entnum, int entchannel)
 424 {
 425         int ch_idx;
 426         int first_to_die;
 427         int life_left;
 428
 429 // Check for replacement sound, or find the best one to replace
 430         first_to_die = -1;
 431         life_left = 0x7fffffff;
 432         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 433         {
 434                 if (entchannel != 0             // channel 0 never overrides
 435                 && channels[ch_idx].entnum == entnum
 436                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 437                 {       // always override sound from same entity
 438                         first_to_die = ch_idx;
 439                         break;
 440                 }
 441
 442                 // don't let monster sounds override player sounds
 443                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 444                         continue;
 445
 446                 if (channels[ch_idx].end - paintedtime < life_left)
 447                 {
 448                         life_left = channels[ch_idx].end - paintedtime;
 449                         first_to_die = ch_idx;
 450                 }
 451         }
 452
 453         if (first_to_die == -1)
 454                 return NULL;
 455
 456         if (channels[first_to_die].sfx)
 457                 channels[first_to_die].sfx = NULL;
 458
 459         return &channels[first_to_die];
 460 }
 461
 462 /*
 463 =================
 464 SND_Spatialize
 465 =================
 466 */
 467 void SND_Spatialize(channel_t *ch, int isstatic)
 468 {
 469         vec_t dist, scale, pan;
 470         vec3_t source_vec;
 471
 472         // anything coming from the view entity will always be full volume
 473         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 474         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 475         {
 476                 ch->leftvol = ch->master_vol;
 477                 ch->rightvol = ch->master_vol;
 478         }
 479         else
 480         {
 481                 // update sound origin if we know about the entity
 482                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 483                 {
 484                         //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]);
 485                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 486                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 487                                 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);
 488                 }
 489
 490                 // calculate stereo seperation and distance attenuation
 491                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 492                 dist = VectorNormalizeLength(source_vec);
 493                 // distance
 494                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 495                 // panning
 496                 pan = scale * DotProduct(listener_viewleft, source_vec);
 497                 // calculate the volumes
 498                 ch->leftvol = (int) (scale + pan);
 499                 ch->rightvol = (int) (scale - pan);
 500         }
 501
 502         // LordHavoc: allow adjusting volume of static sounds
 503         if (isstatic)
 504         {
 505                 ch->leftvol *= snd_staticvolume.value;
 506                 ch->rightvol *= snd_staticvolume.value;
 507         }
 508
 509         // clamp volumes
 510         ch->leftvol = bound(0, ch->leftvol, 255);
 511         ch->rightvol = bound(0, ch->rightvol, 255);
 512 }
 513
 514
 515 // =======================================================================
 516 // Start a sound effect
 517 // =======================================================================
 518
 519 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 520 {
 521         channel_t *target_chan, *check;
 522         int             vol;
 523         int             ch_idx;
 524         size_t  skip;
 525
 526         if (!sound_started || !sfx || !sfx->fetcher || nosound.integer)
 527                 return;
 528
 529         vol = fvol*255;
 530
 531 // pick a channel to play on
 532         target_chan = SND_PickChannel(entnum, entchannel);
 533         if (!target_chan)
 534                 return;
 535
 536 // spatialize
 537         memset (target_chan, 0, sizeof(*target_chan));
 538         VectorCopy(origin, target_chan->origin);
 539         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 540         target_chan->master_vol = vol;
 541         target_chan->entnum = entnum;
 542         target_chan->entchannel = entchannel;
 543         SND_Spatialize(target_chan, false);
 544
 545         // LordHavoc: spawn the sound anyway because the player might teleport to it
 546         //if (!target_chan->leftvol && !target_chan->rightvol)
 547         //      return;         // not audible at all
 548
 549         // new channel
 550         if (!S_LoadSound (sfx, true))
 551         {
 552                 target_chan->sfx = NULL;
 553                 return;         // couldn't load the sound's data
 554         }
 555
 556         target_chan->sfx = sfx;
 557         target_chan->pos = 0.0;
 558         target_chan->end = paintedtime + sfx->total_length;
 559
 560 // if an identical sound has also been started this frame, offset the pos
 561 // a bit to keep it from just making the first one louder
 562         check = &channels[NUM_AMBIENTS];
 563         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 564         {
 565                 if (check == target_chan)
 566                         continue;
 567                 if (check->sfx == sfx && !check->pos)
 568                 {
 569                         // LordHavoc: fixed skip calculations
 570                         skip = 0.1 * sfx->format.speed;
 571                         if (skip > sfx->total_length)
 572                                 skip = sfx->total_length;
 573                         if (skip > 0)
 574                                 skip = rand() % skip;
 575                         target_chan->pos += skip;
 576                         target_chan->end -= skip;
 577                         break;
 578                 }
 579         }
 580 }
 581
 582 void S_StopSound(int entnum, int entchannel)
 583 {
 584         int i;
 585
 586         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 587         {
 588                 if (channels[i].entnum == entnum
 589                         && channels[i].entchannel == entchannel)
 590                 {
 591                         channels[i].end = 0;
 592                         channels[i].sfx = NULL;
 593                         return;
 594                 }
 595         }
 596 }
 597
 598 void S_StopAllSounds(qboolean clear)
 599 {
 600         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 601         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 602
 603         if (clear)
 604                 S_ClearBuffer();
 605 }
 606
 607 void S_StopAllSoundsC(void)
 608 {
 609         S_StopAllSounds(true);
 610 }
 611
 612 void S_ClearBuffer(void)
 613 {
 614         int             clear;
 615
 616         if (!sound_started || !shm)
 617                 return;
 618
 619         if (shm->format.width == 1)
 620                 clear = 0x80;
 621         else
 622                 clear = 0;
 623
 624 #ifdef _WIN32
 625         if (pDSBuf)
 626         {
 627                 DWORD   dwSize;
 628                 DWORD   *pData;
 629                 int             reps;
 630                 HRESULT hresult;
 631
 632                 reps = 0;
 633
 634                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 635                 {
 636                         if (hresult != DSERR_BUFFERLOST)
 637                         {
 638                                 Con_Print("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 639                                 S_Shutdown ();
 640                                 return;
 641                         }
 642
 643                         if (++reps > 10000)
 644                         {
 645                                 Con_Print("S_ClearBuffer: DS: couldn't restore buffer\n");
 646                                 S_Shutdown ();
 647                                 return;
 648                         }
 649                 }
 650
 651                 memset(pData, clear, shm->samples * shm->format.width);
 652
 653                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 654
 655         }
 656         else
 657 #endif
 658         if (shm->buffer)
 659         {
 660                 int             setsize = shm->samples * shm->format.width;
 661                 char    *buf = shm->buffer;
 662
 663                 while (setsize--)
 664                         *buf++ = clear;
 665
 666 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 667 // reads the memory area before writing to it causing a seg fault
 668 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 669 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 670         }
 671 }
 672
 673
 674 /*
 675 =================
 676 S_StaticSound
 677 =================
 678 */
 679 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 680 {
 681         channel_t       *ss;
 682
 683         if (!sfx)
 684                 return;
 685
 686         if (total_channels == MAX_CHANNELS)
 687         {
 688                 Con_Print("total_channels == MAX_CHANNELS\n");
 689                 return;
 690         }
 691
 692         if (!S_LoadSound (sfx, true))
 693                 return;
 694
 695         if (sfx->loopstart == -1)
 696                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 697
 698         ss = &channels[total_channels++];
 699         memset(ss, 0, sizeof(*ss));
 700         ss->forceloop = true;
 701         ss->sfx = sfx;
 702         VectorCopy (origin, ss->origin);
 703         ss->master_vol = vol;
 704         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 705         ss->end = paintedtime + sfx->total_length;
 706
 707         SND_Spatialize (ss, true);
 708 }
 709
 710
 711 //=============================================================================
 712
 713 /*
 714 ===================
 715 S_UpdateAmbientSounds
 716 ===================
 717 */
 718 void S_UpdateAmbientSounds (void)
 719 {
 720         float           vol;
 721         int                     ambient_channel;
 722         channel_t       *chan;
 723         qbyte           ambientlevels[NUM_AMBIENTS];
 724
 725         // LordHavoc: kill ambient sounds until proven otherwise
 726         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 727                 channels[ambient_channel].sfx = NULL;
 728
 729         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 730                 return;
 731
 732         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 733
 734 // calc ambient sound levels
 735         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 736         {
 737                 if (ambient_sfx[ambient_channel] &&
 738                         (ambient_sfx[ambient_channel]->flags & SFXFLAG_SILENTLYMISSING))
 739                         continue;
 740                 chan = &channels[ambient_channel];
 741                 chan->forceloop = true;
 742                 chan->sfx = ambient_sfx[ambient_channel];
 743
 744                 vol = ambient_level.value * ambientlevels[ambient_channel];
 745                 if (vol < 8)
 746                         vol = 0;
 747
 748         // don't adjust volume too fast
 749                 if (chan->master_vol < vol)
 750                 {
 751                         chan->master_vol += host_realframetime * ambient_fade.value;
 752                         if (chan->master_vol > vol)
 753                                 chan->master_vol = vol;
 754                 }
 755                 else if (chan->master_vol > vol)
 756                 {
 757                         chan->master_vol -= host_realframetime * ambient_fade.value;
 758                         if (chan->master_vol < vol)
 759                                 chan->master_vol = vol;
 760                 }
 761
 762                 chan->leftvol = chan->rightvol = chan->master_vol;
 763         }
 764 }
 765
 766
 767 /*
 768 ============
 769 S_Update
 770
 771 Called once each time through the main loop
 772 ============
 773 */
 774 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 775 {
 776         unsigned int i, j, total;
 777         channel_t *ch, *combine;
 778
 779         if (!snd_initialized.integer || (snd_blocked > 0))
 780                 return;
 781
 782         VectorCopy(origin, listener_vieworigin);
 783         VectorCopy(forward, listener_viewforward);
 784         VectorCopy(left, listener_viewleft);
 785         VectorCopy(up, listener_viewup);
 786
 787 // update general area ambient sound sources
 788         S_UpdateAmbientSounds ();
 789
 790         combine = NULL;
 791
 792 // update spatialization for static and dynamic sounds
 793         ch = channels+NUM_AMBIENTS;
 794         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 795         {
 796                 if (!ch->sfx)
 797                         continue;
 798                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 799                 if (!ch->leftvol && !ch->rightvol)
 800                         continue;
 801
 802         // try to combine static sounds with a previous channel of the same
 803         // sound effect so we don't mix five torches every frame
 804
 805                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 806                 {
 807                 // see if it can just use the last one
 808                         if (combine && combine->sfx == ch->sfx)
 809                         {
 810                                 combine->leftvol += ch->leftvol;
 811                                 combine->rightvol += ch->rightvol;
 812                                 ch->leftvol = ch->rightvol = 0;
 813                                 continue;
 814                         }
 815                 // search for one
 816                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 817                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 818                                 if (combine->sfx == ch->sfx)
 819                                         break;
 820
 821                         if (j == total_channels)
 822                                 combine = NULL;
 823                         else
 824                         {
 825                                 if (combine != ch)
 826                                 {
 827                                         combine->leftvol += ch->leftvol;
 828                                         combine->rightvol += ch->rightvol;
 829                                         ch->leftvol = ch->rightvol = 0;
 830                                 }
 831                                 continue;
 832                         }
 833                 }
 834         }
 835
 836 //
 837 // debugging output
 838 //
 839         if (snd_show.integer)
 840         {
 841                 total = 0;
 842                 ch = channels;
 843                 for (i=0 ; i<total_channels; i++, ch++)
 844                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 845                                 total++;
 846
 847                 Con_Printf("----(%u)----\n", total);
 848         }
 849
 850 // mix some sound
 851         S_Update_();
 852 }
 853
 854 void GetSoundtime(void)
 855 {
 856         int             samplepos;
 857         static  int             buffers;
 858         static  int             oldsamplepos;
 859         int             fullsamples;
 860
 861         fullsamples = shm->samples / shm->format.channels;
 862
 863 // it is possible to miscount buffers if it has wrapped twice between
 864 // calls to S_Update.  Oh well.
 865         samplepos = SNDDMA_GetDMAPos();
 866
 867         if (samplepos < oldsamplepos)
 868         {
 869                 buffers++;                                      // buffer wrapped
 870
 871                 if (paintedtime > 0x40000000)
 872                 {       // time to chop things off to avoid 32 bit limits
 873                         buffers = 0;
 874                         paintedtime = fullsamples;
 875                         S_StopAllSounds (true);
 876                 }
 877         }
 878         oldsamplepos = samplepos;
 879
 880         soundtime = buffers * fullsamples + samplepos / shm->format.channels;
 881 }
 882
 883 void IN_Accumulate (void);
 884
 885 void S_ExtraUpdate (void)
 886 {
 887
 888 #ifdef _WIN32
 889         IN_Accumulate ();
 890 #endif
 891
 892         if (snd_noextraupdate.integer)
 893                 return;         // don't pollute timings
 894         S_Update_();
 895 }
 896
 897 void S_Update_(void)
 898 {
 899         unsigned        endtime;
 900         int                             samps;
 901
 902         if (!sound_started || (snd_blocked > 0))
 903                 return;
 904
 905 // Updates DMA time
 906         GetSoundtime();
 907
 908 // check to make sure that we haven't overshot
 909         if (paintedtime < soundtime)
 910                 paintedtime = soundtime;
 911
 912 // mix ahead of current position
 913         endtime = soundtime + _snd_mixahead.value * shm->format.speed;
 914         samps = shm->samples >> (shm->format.channels - 1);
 915         if (endtime > (unsigned int)(soundtime + samps))
 916                 endtime = soundtime + samps;
 917
 918 #ifdef _WIN32
 919 // if the buffer was lost or stopped, restore it and/or restart it
 920         {
 921                 DWORD   dwStatus;
 922
 923                 if (pDSBuf)
 924                 {
 925                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
 926                                 Con_Print("Couldn't get sound buffer status\n");
 927
 928                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 929                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 930
 931                         if (!(dwStatus & DSBSTATUS_PLAYING))
 932                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 933                 }
 934         }
 935 #endif
 936
 937         S_PaintChannels (endtime);
 938
 939         SNDDMA_Submit ();
 940 }
 941
 942 /*
 943 ===============================================================================
 944
 945 console functions
 946
 947 ===============================================================================
 948 */
 949
 950 static void S_Play_Common(float fvol, float attenuation)
 951 {
 952         int     i;
 953         char name[256];
 954         sfx_t   *sfx;
 955
 956         i = 1;
 957         while (i<Cmd_Argc())
 958         {
 959                 if (!strrchr(Cmd_Argv(i), '.'))
 960                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
 961                 else
 962                         strlcpy(name, Cmd_Argv(i), sizeof(name));
 963                 sfx = S_PrecacheSound(name, true);
 964
 965                 // If we need to get the volume from the command line
 966                 if (fvol == -1.0f)
 967                 {
 968                         fvol = atof(Cmd_Argv(i+1));
 969                         i += 2;
 970                 }
 971                 else
 972                         i++;
 973
 974                 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
 975         }
 976 }
 977
 978 void S_Play(void)
 979 {
 980         S_Play_Common (1.0f, 1.0f);
 981 }
 982
 983 void S_Play2(void)
 984 {
 985         S_Play_Common (1.0f, 0.0f);
 986 }
 987
 988 void S_PlayVol(void)
 989 {
 990         S_Play_Common (-1.0f, 0.0f);
 991 }
 992
 993 void S_SoundList(void)
 994 {
 995         int             i;
 996         sfx_t   *sfx;
 997         int             size, total;
 998
 999         total = 0;
1000         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
1001         {
1002                 if (sfx->fetcher != NULL)
1003                 {
1004                         size = sfx->mempool->totalsize;
1005                         total += size;
1006                         Con_Printf("%c(%2db) %7i : %s\n", sfx->loopstart >= 0 ? 'L' : ' ', sfx->format.width * 8, size, sfx->name);
1007                 }
1008         }
1009         Con_Printf("Total resident: %i\n", total);
1010 }
1011
1012
1013 void S_LocalSound (char *sound)
1014 {
1015         sfx_t   *sfx;
1016
1017         if (!snd_initialized.integer || nosound.integer)
1018                 return;
1019
1020         sfx = S_PrecacheSound (sound, true);
1021         if (!sfx)
1022         {
1023                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1024                 return;
1025         }
1026         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1027 }
1028
1029
1030 #define RAWSAMPLESBUFFER 32768
1031 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1032 int s_rawsamplesbuffer_start;
1033 size_t s_rawsamplesbuffer_count;
1034
1035 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1036 {
1037         int b2, b3;
1038         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1039         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1040                 return;
1041         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1042         if (b2 + length > RAWSAMPLESBUFFER)
1043         {
1044                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1045                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1046                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1047         }
1048         else
1049                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1050         s_rawsamplesbuffer_count += length;
1051 }
1052
1053 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1054 {
1055         int b1, b2;
1056         size_t l;
1057         int i;
1058         short *in;
1059         int *out;
1060         int count;
1061         l = length;
1062         if (l > s_rawsamplesbuffer_count)
1063                 l = s_rawsamplesbuffer_count;
1064         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1065         if (b1 + l > RAWSAMPLESBUFFER)
1066         {
1067                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1068                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1069                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1070                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1071                         out[i] = in[i];
1072                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1073                         out[i] = in[i];
1074                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1075         }
1076         else
1077         {
1078                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1079                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1080                         out[i] = in[i];
1081                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1082         }
1083         if (l < (int)length)
1084         {
1085                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1086                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1087         }
1088         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1089         s_rawsamplesbuffer_count -= l;
1090 }
1091
1092 void S_RawSamples_ClearQueue(void)
1093 {
1094         s_rawsamplesbuffer_count = 0;
1095         s_rawsamplesbuffer_start = 0;
1096 }
1097
1098 int S_RawSamples_QueueWantsMore(void)
1099 {
1100         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->format.speed >> 1, RAWSAMPLESBUFFER >> 1))
1101                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1102         else
1103                 return 0;
1104 }
1105
1106 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1107 {
1108         if (inputlength != outputlength)
1109         {
1110                 int i, position, stopposition, step;
1111                 short *in, *out;
1112                 step = (float) inputlength * 256.0f / (float) outputlength;
1113                 position = 0;
1114                 stopposition = (inputlength - 1) << 8;
1115                 out = output;
1116                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1117                 {
1118                         in = input + ((position >> 8) << 1);
1119                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1120                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1121                         out += 2;
1122                 }
1123                 stopposition = inputlength << 8;
1124                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1125                 {
1126                         in = input + ((position >> 8) << 1);
1127                         out[0] = in[0];
1128                         out[1] = in[2];
1129                         out += 2;
1130                 }
1131         }
1132         else
1133                 memcpy(output, input, inputlength * sizeof(short[2]));
1134 }
1135
1136 int S_RawSamples_SampleRate(void)
1137 {
1138         return shm != NULL ? shm->format.speed : 0;
1139 }
1140