snd_dma.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // snd_dma.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #ifdef _WIN32
  25 #include "winquake.h"
  26 #endif
  27
  28 void S_Play(void);
  29 void S_PlayVol(void);
  30 void S_Play2(void);
  31 void S_SoundList(void);
  32 void S_Update_();
  33 void S_StopAllSounds(qboolean clear);
  34 void S_StopAllSoundsC(void);
  35
  36 // =======================================================================
  37 // Internal sound data & structures
  38 // =======================================================================
  39
  40 channel_t channels[MAX_CHANNELS];
  41 int total_channels;
  42
  43 int snd_blocked = 0;
  44 static qboolean snd_ambient = 1;
  45 qboolean snd_initialized = false;
  46
  47 // pointer should go away
  48 volatile dma_t *shm = 0;
  49 volatile dma_t sn;
  50
  51 vec3_t listener_origin;
  52 vec3_t listener_forward;
  53 vec3_t listener_right;
  54 vec3_t listener_up;
  55 vec_t sound_nominal_clip_dist=1000.0;
  56 mempool_t *snd_mempool;
  57
  58 // sample PAIRS
  59 int soundtime;
  60 int paintedtime;
  61
  62
  63 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  64 #define MAX_SFX 4096
  65 sfx_t *known_sfx; // allocated [MAX_SFX]
  66 int num_sfx;
  67
  68 sfx_t *ambient_sfx[NUM_AMBIENTS];
  69
  70 int sound_started = 0;
  71
  72 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  73 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  74
  75 cvar_t nosound = {0, "nosound", "0"};
  76 cvar_t snd_precache = {0, "snd_precache", "1"};
  77 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  78 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  79 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  80 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  81 cvar_t snd_show = {0, "snd_show", "0"};
  82 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  83 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  84
  85
  86 // ====================================================================
  87 // User-setable variables
  88 // ====================================================================
  89
  90
  91 //
  92 // Fake dma is a synchronous faking of the DMA progress used for
  93 // isolating performance in the renderer.  The fakedma_updates is
  94 // number of times S_Update() is called per second.
  95 //
  96
  97 qboolean fakedma = false;
  98 int fakedma_updates = 15;
  99
 100
 101 void S_AmbientOff (void)
 102 {
 103         snd_ambient = false;
 104 }
 105
 106
 107 void S_AmbientOn (void)
 108 {
 109         snd_ambient = true;
 110 }
 111
 112
 113 void S_SoundInfo_f(void)
 114 {
 115         if (!sound_started || !shm)
 116         {
 117                 Con_Printf ("sound system not started\n");
 118                 return;
 119         }
 120
 121         Con_Printf("%5d stereo\n", shm->channels - 1);
 122         Con_Printf("%5d samples\n", shm->samples);
 123         Con_Printf("%5d samplepos\n", shm->samplepos);
 124         Con_Printf("%5d samplebits\n", shm->samplebits);
 125         Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
 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
 132 /*
 133 ================
 134 S_Startup
 135 ================
 136 */
 137 void S_Startup (void)
 138 {
 139         int rc;
 140
 141         if (!snd_initialized)
 142                 return;
 143
 144         if (!fakedma)
 145         {
 146                 rc = SNDDMA_Init();
 147
 148                 if (!rc)
 149                 {
 150                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
 151                         sound_started = 0;
 152                         return;
 153                 }
 154         }
 155
 156         sound_started = 1;
 157 }
 158
 159 /*
 160 ================
 161 S_Init
 162 ================
 163 */
 164 void S_Init (void)
 165 {
 166         Con_Printf("\nSound Initialization\n");
 167
 168         S_RawSamples_ClearQueue();
 169
 170         Cvar_RegisterVariable(&volume);
 171         Cvar_RegisterVariable(&bgmvolume);
 172
 173         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 174                 return;
 175
 176         snd_mempool = Mem_AllocPool("sound");
 177
 178         if (COM_CheckParm("-simsound"))
 179                 fakedma = true;
 180
 181         Cmd_AddCommand("play", S_Play);
 182         Cmd_AddCommand("play2", S_Play2);
 183         Cmd_AddCommand("playvol", S_PlayVol);
 184         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 185         Cmd_AddCommand("soundlist", S_SoundList);
 186         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 187
 188         Cvar_RegisterVariable(&nosound);
 189         Cvar_RegisterVariable(&snd_precache);
 190         Cvar_RegisterVariable(&bgmbuffer);
 191         Cvar_RegisterVariable(&ambient_level);
 192         Cvar_RegisterVariable(&ambient_fade);
 193         Cvar_RegisterVariable(&snd_noextraupdate);
 194         Cvar_RegisterVariable(&snd_show);
 195         Cvar_RegisterVariable(&_snd_mixahead);
 196         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 197
 198         snd_initialized = true;
 199
 200         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 201         num_sfx = 0;
 202
 203         S_Startup ();
 204
 205         SND_InitScaletable ();
 206
 207 // create a piece of DMA memory
 208
 209         if (fakedma)
 210         {
 211                 shm = (void *) Mem_Alloc(snd_mempool, sizeof(*shm));
 212                 shm->splitbuffer = 0;
 213                 shm->samplebits = 16;
 214                 shm->speed = 22050;
 215                 shm->channels = 2;
 216                 shm->samples = 32768;
 217                 shm->samplepos = 0;
 218                 shm->soundalive = true;
 219                 shm->gamealive = true;
 220                 shm->submission_chunk = 1;
 221                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
 222         }
 223
 224         if (!sound_started)
 225                 return;
 226
 227         Con_Printf ("Sound sampling rate: %i\n", shm->speed);
 228
 229         // provides a tick sound until washed clean
 230
 231         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
 232         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
 233
 234         S_StopAllSounds (true);
 235 }
 236
 237
 238 // =======================================================================
 239 // Shutdown sound engine
 240 // =======================================================================
 241
 242 void S_Shutdown(void)
 243 {
 244         if (!sound_started)
 245                 return;
 246
 247         if (shm)
 248                 shm->gamealive = 0;
 249
 250         shm = 0;
 251         sound_started = 0;
 252
 253         if (!fakedma)
 254                 SNDDMA_Shutdown();
 255 }
 256
 257
 258 // =======================================================================
 259 // Load a sound
 260 // =======================================================================
 261
 262 /*
 263 ==================
 264 S_FindName
 265
 266 ==================
 267 */
 268 sfx_t *S_FindName (char *name)
 269 {
 270         int i;
 271         sfx_t *sfx;
 272
 273         if (!name)
 274                 Host_Error ("S_FindName: NULL\n");
 275
 276         if (strlen(name) >= MAX_QPATH)
 277                 Host_Error ("Sound name too long: %s", name);
 278
 279 // see if already loaded
 280         for (i = 0;i < num_sfx;i++)
 281                 if (!strcmp(known_sfx[i].name, name))
 282                         return &known_sfx[i];
 283
 284         if (num_sfx == MAX_SFX)
 285                 Sys_Error ("S_FindName: out of sfx_t");
 286
 287         sfx = &known_sfx[i];
 288         memset(sfx, 0, sizeof(*sfx));
 289         strcpy (sfx->name, name);
 290
 291         num_sfx++;
 292
 293         return sfx;
 294 }
 295
 296
 297 /*
 298 ==================
 299 S_TouchSound
 300
 301 ==================
 302 */
 303 void S_TouchSound (char *name)
 304 {
 305         sfx_t   *sfx;
 306
 307         if (!sound_started)
 308                 return;
 309
 310         sfx = S_FindName (name);
 311 }
 312
 313 /*
 314 ==================
 315 S_PrecacheSound
 316
 317 ==================
 318 */
 319 sfx_t *S_PrecacheSound (char *name, int complain)
 320 {
 321         sfx_t *sfx;
 322
 323         if (!sound_started || nosound.integer)
 324                 return NULL;
 325
 326         sfx = S_FindName (name);
 327
 328 // cache it in
 329         if (snd_precache.integer)
 330                 S_LoadSound (sfx, complain);
 331
 332         return sfx;
 333 }
 334
 335
 336 //=============================================================================
 337
 338 /*
 339 =================
 340 SND_PickChannel
 341 =================
 342 */
 343 channel_t *SND_PickChannel(int entnum, int entchannel)
 344 {
 345     int ch_idx;
 346     int first_to_die;
 347     int life_left;
 348
 349 // Check for replacement sound, or find the best one to replace
 350     first_to_die = -1;
 351     life_left = 0x7fffffff;
 352     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 353     {
 354                 if (entchannel != 0             // channel 0 never overrides
 355                 && channels[ch_idx].entnum == entnum
 356                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
 357                 {       // always override sound from same entity
 358                         first_to_die = ch_idx;
 359                         break;
 360                 }
 361
 362                 // don't let monster sounds override player sounds
 363                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
 364                         continue;
 365
 366                 if (channels[ch_idx].end - paintedtime < life_left)
 367                 {
 368                         life_left = channels[ch_idx].end - paintedtime;
 369                         first_to_die = ch_idx;
 370                 }
 371    }
 372
 373         if (first_to_die == -1)
 374                 return NULL;
 375
 376         if (channels[first_to_die].sfx)
 377                 channels[first_to_die].sfx = NULL;
 378
 379     return &channels[first_to_die];
 380 }
 381
 382 /*
 383 =================
 384 SND_Spatialize
 385 =================
 386 */
 387 void SND_Spatialize(channel_t *ch)
 388 {
 389     vec_t dot;
 390     vec_t dist;
 391     vec_t lscale, rscale, scale;
 392     vec3_t source_vec;
 393         sfx_t *snd;
 394
 395 // anything coming from the view entity will always be full volume
 396 // LordHavoc: make sounds with ATTN_NONE have no spatialization
 397         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 398         {
 399                 ch->leftvol = ch->master_vol;
 400                 ch->rightvol = ch->master_vol;
 401                 return;
 402         }
 403
 404 // calculate stereo seperation and distance attenuation
 405
 406         snd = ch->sfx;
 407         VectorSubtract(ch->origin, listener_origin, source_vec);
 408
 409         dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
 410
 411         dot = DotProduct(listener_right, source_vec);
 412
 413         if (shm->channels == 1)
 414         {
 415                 rscale = 1.0;
 416                 lscale = 1.0;
 417         }
 418         else
 419         {
 420                 rscale = 1.0 + dot;
 421                 lscale = 1.0 - dot;
 422         }
 423
 424 // add in distance effect
 425         scale = (1.0 - dist) * rscale;
 426         ch->rightvol = (int) (ch->master_vol * scale);
 427         if (ch->rightvol < 0)
 428                 ch->rightvol = 0;
 429
 430         scale = (1.0 - dist) * lscale;
 431         ch->leftvol = (int) (ch->master_vol * scale);
 432         if (ch->leftvol < 0)
 433                 ch->leftvol = 0;
 434 }
 435
 436
 437 // =======================================================================
 438 // Start a sound effect
 439 // =======================================================================
 440
 441 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 442 {
 443         channel_t *target_chan, *check;
 444         sfxcache_t      *sc;
 445         int             vol;
 446         int             ch_idx;
 447         int             skip;
 448
 449         if (!sound_started)
 450                 return;
 451
 452         if (!sfx)
 453                 return;
 454
 455         if (nosound.integer)
 456                 return;
 457
 458         vol = fvol*255;
 459
 460 // pick a channel to play on
 461         target_chan = SND_PickChannel(entnum, entchannel);
 462         if (!target_chan)
 463                 return;
 464
 465 // spatialize
 466         memset (target_chan, 0, sizeof(*target_chan));
 467         VectorCopy(origin, target_chan->origin);
 468         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 469         target_chan->master_vol = vol;
 470         target_chan->entnum = entnum;
 471         target_chan->entchannel = entchannel;
 472         SND_Spatialize(target_chan);
 473
 474         if (!target_chan->leftvol && !target_chan->rightvol)
 475                 return;         // not audible at all
 476
 477 // new channel
 478         sc = S_LoadSound (sfx, true);
 479         if (!sc)
 480         {
 481                 target_chan->sfx = NULL;
 482                 return;         // couldn't load the sound's data
 483         }
 484
 485         target_chan->sfx = sfx;
 486         target_chan->pos = 0.0;
 487     target_chan->end = paintedtime + sc->length;
 488
 489 // if an identical sound has also been started this frame, offset the pos
 490 // a bit to keep it from just making the first one louder
 491         check = &channels[NUM_AMBIENTS];
 492     for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 493     {
 494                 if (check == target_chan)
 495                         continue;
 496                 if (check->sfx == sfx && !check->pos)
 497                 {
 498                         // LordHavoc: fixed skip calculations
 499                         skip = 0.1 * shm->speed;
 500                         if (skip > sc->length)
 501                                 skip = sc->length;
 502                         if (skip > 0)
 503                                 skip = rand() % skip;
 504                         target_chan->pos += skip;
 505                         target_chan->end -= skip;
 506                         break;
 507                 }
 508
 509         }
 510 }
 511
 512 void S_StopSound(int entnum, int entchannel)
 513 {
 514         int i;
 515
 516         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
 517         {
 518                 if (channels[i].entnum == entnum
 519                         && channels[i].entchannel == entchannel)
 520                 {
 521                         channels[i].end = 0;
 522                         channels[i].sfx = NULL;
 523                         return;
 524                 }
 525         }
 526 }
 527
 528 void S_StopAllSounds(qboolean clear)
 529 {
 530         int             i;
 531
 532         if (!sound_started)
 533                 return;
 534
 535         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 536
 537         for (i=0 ; i<MAX_CHANNELS ; i++)
 538                 if (channels[i].sfx)
 539                         channels[i].sfx = NULL;
 540
 541         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 542
 543         if (clear)
 544                 S_ClearBuffer ();
 545 }
 546
 547 void S_StopAllSoundsC (void)
 548 {
 549         S_StopAllSounds (true);
 550 }
 551
 552 void S_ClearBuffer (void)
 553 {
 554         int             clear;
 555
 556 #ifdef _WIN32
 557         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
 558 #else
 559         if (!sound_started || !shm || !shm->buffer)
 560 #endif
 561                 return;
 562
 563         if (shm->samplebits == 8)
 564                 clear = 0x80;
 565         else
 566                 clear = 0;
 567
 568 #ifdef _WIN32
 569         if (pDSBuf)
 570         {
 571                 DWORD   dwSize;
 572                 DWORD   *pData;
 573                 int             reps;
 574                 HRESULT hresult;
 575
 576                 reps = 0;
 577
 578                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 579                 {
 580                         if (hresult != DSERR_BUFFERLOST)
 581                         {
 582                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 583                                 S_Shutdown ();
 584                                 return;
 585                         }
 586
 587                         if (++reps > 10000)
 588                         {
 589                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
 590                                 S_Shutdown ();
 591                                 return;
 592                         }
 593                 }
 594
 595                 memset(pData, clear, shm->samples * shm->samplebits/8);
 596
 597                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 598
 599         }
 600         else
 601 #endif
 602         {
 603                 int             setsize = shm->samples * shm->samplebits / 8;
 604                 char    *buf = shm->buffer;
 605
 606                 while (setsize--)
 607                         *buf++ = 0;
 608
 609 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 610 // reads the memory area before writing to it causing a seg fault
 611 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 612 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 613         }
 614 }
 615
 616
 617 /*
 618 =================
 619 S_StaticSound
 620 =================
 621 */
 622 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 623 {
 624         channel_t       *ss;
 625         sfxcache_t              *sc;
 626
 627         if (!sfx)
 628                 return;
 629
 630         if (total_channels == MAX_CHANNELS)
 631         {
 632                 Con_Printf ("total_channels == MAX_CHANNELS\n");
 633                 return;
 634         }
 635
 636         ss = &channels[total_channels];
 637         total_channels++;
 638
 639         sc = S_LoadSound (sfx, true);
 640         if (!sc)
 641                 return;
 642
 643         if (sc->loopstart == -1)
 644         {
 645                 Con_Printf ("Sound %s not looped\n", sfx->name);
 646                 return;
 647         }
 648
 649         ss->sfx = sfx;
 650         VectorCopy (origin, ss->origin);
 651         ss->master_vol = vol;
 652         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 653     ss->end = paintedtime + sc->length;
 654
 655         SND_Spatialize (ss);
 656 }
 657
 658
 659 //=============================================================================
 660
 661 /*
 662 ===================
 663 S_UpdateAmbientSounds
 664 ===================
 665 */
 666 void S_UpdateAmbientSounds (void)
 667 {
 668         mleaf_t         *l;
 669         float           vol;
 670         int                     ambient_channel;
 671         channel_t       *chan;
 672
 673         // LordHavoc: kill ambient sounds until proven otherwise
 674         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 675                 channels[ambient_channel].sfx = NULL;
 676
 677         if (!snd_ambient || !cl.worldmodel || ambient_level.value <= 0)
 678                 return;
 679
 680         l = Mod_PointInLeaf (listener_origin, cl.worldmodel);
 681         if (!l)
 682                 return;
 683
 684 // calc ambient sound levels
 685         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 686         {
 687                 if (ambient_sfx[ambient_channel] && ambient_sfx[ambient_channel]->silentlymissing)
 688                         continue;
 689                 chan = &channels[ambient_channel];
 690                 chan->sfx = ambient_sfx[ambient_channel];
 691
 692                 vol = ambient_level.value * l->ambient_sound_level[ambient_channel];
 693                 if (vol < 8)
 694                         vol = 0;
 695
 696         // don't adjust volume too fast
 697                 if (chan->master_vol < vol)
 698                 {
 699                         chan->master_vol += host_realframetime * ambient_fade.value;
 700                         if (chan->master_vol > vol)
 701                                 chan->master_vol = vol;
 702                 }
 703                 else if (chan->master_vol > vol)
 704                 {
 705                         chan->master_vol -= host_realframetime * ambient_fade.value;
 706                         if (chan->master_vol < vol)
 707                                 chan->master_vol = vol;
 708                 }
 709
 710                 chan->leftvol = chan->rightvol = chan->master_vol;
 711         }
 712 }
 713
 714
 715 /*
 716 ============
 717 S_Update
 718
 719 Called once each time through the main loop
 720 ============
 721 */
 722 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
 723 {
 724         int                     i, j;
 725         int                     total;
 726         channel_t       *ch;
 727         channel_t       *combine;
 728
 729         if (!sound_started || (snd_blocked > 0))
 730                 return;
 731
 732         VectorCopy(origin, listener_origin);
 733         VectorCopy(forward, listener_forward);
 734         VectorCopy(right, listener_right);
 735         VectorCopy(up, listener_up);
 736
 737 // update general area ambient sound sources
 738         S_UpdateAmbientSounds ();
 739
 740         combine = NULL;
 741
 742 // update spatialization for static and dynamic sounds
 743         ch = channels+NUM_AMBIENTS;
 744         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 745         {
 746                 if (!ch->sfx)
 747                         continue;
 748                 SND_Spatialize(ch);         // respatialize channel
 749                 if (!ch->leftvol && !ch->rightvol)
 750                         continue;
 751
 752         // try to combine static sounds with a previous channel of the same
 753         // sound effect so we don't mix five torches every frame
 754
 755                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 756                 {
 757                 // see if it can just use the last one
 758                         if (combine && combine->sfx == ch->sfx)
 759                         {
 760                                 combine->leftvol += ch->leftvol;
 761                                 combine->rightvol += ch->rightvol;
 762                                 ch->leftvol = ch->rightvol = 0;
 763                                 continue;
 764                         }
 765                 // search for one
 766                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 767                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 768                                 if (combine->sfx == ch->sfx)
 769                                         break;
 770
 771                         if (j == total_channels)
 772                         {
 773                                 combine = NULL;
 774                         }
 775                         else
 776                         {
 777                                 if (combine != ch)
 778                                 {
 779                                         combine->leftvol += ch->leftvol;
 780                                         combine->rightvol += ch->rightvol;
 781                                         ch->leftvol = ch->rightvol = 0;
 782                                 }
 783                                 continue;
 784                         }
 785                 }
 786         }
 787
 788 //
 789 // debugging output
 790 //
 791         if (snd_show.integer)
 792         {
 793                 total = 0;
 794                 ch = channels;
 795                 for (i=0 ; i<total_channels; i++, ch++)
 796                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 797                                 total++;
 798
 799                 Con_Printf ("----(%i)----\n", total);
 800         }
 801
 802 // mix some sound
 803         S_Update_();
 804 }
 805
 806 void GetSoundtime(void)
 807 {
 808         int             samplepos;
 809         static  int             buffers;
 810         static  int             oldsamplepos;
 811         int             fullsamples;
 812
 813         fullsamples = shm->samples / shm->channels;
 814
 815 // it is possible to miscount buffers if it has wrapped twice between
 816 // calls to S_Update.  Oh well.
 817 #ifdef __sun__
 818         soundtime = SNDDMA_GetSamples();
 819 #else
 820         samplepos = SNDDMA_GetDMAPos();
 821
 822
 823         if (samplepos < oldsamplepos)
 824         {
 825                 buffers++;                                      // buffer wrapped
 826
 827                 if (paintedtime > 0x40000000)
 828                 {       // time to chop things off to avoid 32 bit limits
 829                         buffers = 0;
 830                         paintedtime = fullsamples;
 831                         S_StopAllSounds (true);
 832                 }
 833         }
 834         oldsamplepos = samplepos;
 835
 836         soundtime = buffers*fullsamples + samplepos/shm->channels;
 837 #endif
 838 }
 839
 840 void IN_Accumulate (void);
 841
 842 void S_ExtraUpdate (void)
 843 {
 844
 845 #ifdef _WIN32
 846         IN_Accumulate ();
 847 #endif
 848
 849         if (snd_noextraupdate.integer)
 850                 return;         // don't pollute timings
 851         S_Update_();
 852 }
 853
 854 void S_Update_(void)
 855 {
 856         unsigned        endtime;
 857         int                             samps;
 858
 859         if (!sound_started || (snd_blocked > 0))
 860                 return;
 861
 862 // Updates DMA time
 863         GetSoundtime();
 864
 865 // check to make sure that we haven't overshot
 866         if (paintedtime < soundtime)
 867                 paintedtime = soundtime;
 868
 869 // mix ahead of current position
 870         endtime = soundtime + _snd_mixahead.value * shm->speed;
 871         samps = shm->samples >> (shm->channels-1);
 872         if (endtime > (unsigned int)(soundtime + samps))
 873                 endtime = soundtime + samps;
 874
 875 #ifdef _WIN32
 876 // if the buffer was lost or stopped, restore it and/or restart it
 877         {
 878                 DWORD   dwStatus;
 879
 880                 if (pDSBuf)
 881                 {
 882                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
 883                                 Con_Printf ("Couldn't get sound buffer status\n");
 884
 885                         if (dwStatus & DSBSTATUS_BUFFERLOST)
 886                                 pDSBuf->lpVtbl->Restore (pDSBuf);
 887
 888                         if (!(dwStatus & DSBSTATUS_PLAYING))
 889                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
 890                 }
 891         }
 892 #endif
 893
 894         S_PaintChannels (endtime);
 895
 896         SNDDMA_Submit ();
 897 }
 898
 899 /*
 900 ===============================================================================
 901
 902 console functions
 903
 904 ===============================================================================
 905 */
 906
 907 void S_Play(void)
 908 {
 909         static int hash=345;
 910         int     i;
 911         char name[256];
 912         sfx_t   *sfx;
 913
 914         i = 1;
 915         while (i<Cmd_Argc())
 916         {
 917                 if (!strrchr(Cmd_Argv(i), '.'))
 918                 {
 919                         strcpy(name, Cmd_Argv(i));
 920                         strcat(name, ".wav");
 921                 }
 922                 else
 923                         strcpy(name, Cmd_Argv(i));
 924                 sfx = S_PrecacheSound(name, true);
 925                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0);
 926                 i++;
 927         }
 928 }
 929
 930 void S_Play2(void)
 931 {
 932         static int hash=345;
 933         int     i;
 934         char name[256];
 935         sfx_t   *sfx;
 936
 937         i = 1;
 938         while (i<Cmd_Argc())
 939         {
 940                 if (!strrchr(Cmd_Argv(i), '.'))
 941                 {
 942                         strcpy(name, Cmd_Argv(i));
 943                         strcat(name, ".wav");
 944                 }
 945                 else
 946                         strcpy(name, Cmd_Argv(i));
 947                 sfx = S_PrecacheSound(name, true);
 948                 S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 0.0);
 949                 i++;
 950         }
 951 }
 952
 953 void S_PlayVol(void)
 954 {
 955         static int hash=543;
 956         int i;
 957         float vol;
 958         char name[256];
 959         sfx_t   *sfx;
 960
 961         i = 1;
 962         while (i<Cmd_Argc())
 963         {
 964                 if (!strrchr(Cmd_Argv(i), '.'))
 965                 {
 966                         strcpy(name, Cmd_Argv(i));
 967                         strcat(name, ".wav");
 968                 }
 969                 else
 970                         strcpy(name, Cmd_Argv(i));
 971                 sfx = S_PrecacheSound(name, true);
 972                 vol = atof(Cmd_Argv(i+1));
 973                 S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0);
 974                 i+=2;
 975         }
 976 }
 977
 978 void S_SoundList(void)
 979 {
 980         int             i;
 981         sfx_t   *sfx;
 982         sfxcache_t      *sc;
 983         int             size, total;
 984
 985         total = 0;
 986         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
 987         {
 988                 sc = sfx->sfxcache;
 989                 if (!sc)
 990                         continue;
 991                 size = sc->length*sc->width*(sc->stereo+1);
 992                 total += size;
 993                 if (sc->loopstart >= 0)
 994                         Con_Printf ("L");
 995                 else
 996                         Con_Printf (" ");
 997                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
 998         }
 999         Con_Printf ("Total resident: %i\n", total);
1000 }
1001
1002
1003 void S_LocalSound (char *sound)
1004 {
1005         sfx_t   *sfx;
1006
1007         if (nosound.integer)
1008                 return;
1009         if (!sound_started)
1010                 return;
1011
1012         sfx = S_PrecacheSound (sound, true);
1013         if (!sfx)
1014         {
1015                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1016                 return;
1017         }
1018         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1019 }
1020
1021
1022 void S_ClearPrecache (void)
1023 {
1024 }
1025
1026
1027 void S_BeginPrecaching (void)
1028 {
1029 }
1030
1031
1032 void S_EndPrecaching (void)
1033 {
1034 }
1035
1036
1037 #define RAWSAMPLESBUFFER 32768
1038 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1039 int s_rawsamplesbuffer_start;
1040 int s_rawsamplesbuffer_count;
1041
1042 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1043 {
1044         int b2, b3;
1045         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1046         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1047                 return;
1048         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1049         if (b2 + length > RAWSAMPLESBUFFER)
1050         {
1051                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1052                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1053                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1054         }
1055         else
1056                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1057         s_rawsamplesbuffer_count += length;
1058 }
1059
1060 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1061 {
1062         int b1, b2, l;
1063         int i;
1064         short *in;
1065         int *out;
1066         int count;
1067         l = length;
1068         if (l > s_rawsamplesbuffer_count)
1069                 l = s_rawsamplesbuffer_count;
1070         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1071         if (b1 + l > RAWSAMPLESBUFFER)
1072         {
1073                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1074                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1075                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1076                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1077                         out[i] = in[i];
1078                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1079                         out[i] = in[i];
1080                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1081         }
1082         else
1083         {
1084                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1085                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1086                         out[i] = in[i];
1087                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1088         }
1089         if (l < (int)length)
1090         {
1091                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1092                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1093         }
1094         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1095         s_rawsamplesbuffer_count -= l;
1096 }
1097
1098 void S_RawSamples_ClearQueue(void)
1099 {
1100         s_rawsamplesbuffer_count = 0;
1101         s_rawsamplesbuffer_start = 0;
1102 }
1103
1104 int S_RawSamples_QueueWantsMore(void)
1105 {
1106         if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1107                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1108         else
1109                 return 0;
1110 }
1111
1112 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1113 {
1114         if (inputlength != outputlength)
1115         {
1116                 int i, position, stopposition, step;
1117                 short *in, *out;
1118                 step = (float) inputlength * 256.0f / (float) outputlength;
1119                 position = 0;
1120                 stopposition = (inputlength - 1) << 8;
1121                 out = output;
1122                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1123                 {
1124                         in = input + ((position >> 8) << 1);
1125                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1126                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1127                         out += 2;
1128                 }
1129                 stopposition = inputlength << 8;
1130                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1131                 {
1132                         in = input + ((position >> 8) << 1);
1133                         out[0] = in[0];
1134                         out[1] = in[2];
1135                         out += 2;
1136                 }
1137         }
1138         else
1139                 memcpy(output, input, inputlength * sizeof(short[2]));
1140 }
1141
1142 int S_RawSamples_SampleRate(void)
1143 {
1144         return shm != NULL ? shm->speed : 0;
1145 }