snd_main.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_main.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #include "snd_main.h"
  25 #include "snd_ogg.h"
  26
  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
  34 void S_ClearBuffer (void);
  35
  36
  37 // =======================================================================
  38 // Internal sound data & structures
  39 // =======================================================================
  40
  41 channel_t channels[MAX_CHANNELS];
  42 unsigned int total_channels;
  43
  44 int snd_blocked = 0;
  45 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
  46 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1"};
  47
  48 volatile dma_t *shm = 0;
  49 volatile dma_t sn;
  50
  51 vec3_t listener_origin;
  52 matrix4x4_t listener_matrix;
  53 vec_t sound_nominal_clip_dist=1000.0;
  54 mempool_t *snd_mempool;
  55
  56 // sample PAIRS
  57 int soundtime;
  58 int paintedtime;
  59
  60
  61 // Linked list of known sfx
  62 sfx_t *known_sfx = NULL;
  63
  64 qboolean sound_started = false;
  65 qboolean sound_spatialized = false;
  66
  67 // Fake dma is a synchronous faking of the DMA progress used for
  68 // isolating performance in the renderer.
  69 qboolean fakedma = false;
  70
  71 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  72 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  73 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  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 // Ambient sounds
  86 sfx_t* ambient_sfxs [2] = { NULL, NULL };
  87 const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
  88
  89
  90 // ====================================================================
  91 // Functions
  92 // ====================================================================
  93
  94 void S_SoundInfo_f(void)
  95 {
  96         if (!sound_started || !shm)
  97         {
  98                 Con_Print("sound system not started\n");
  99                 return;
 100         }
 101
 102         Con_Printf("%5d stereo\n", shm->format.channels - 1);
 103         Con_Printf("%5d samples\n", shm->samples);
 104         Con_Printf("%5d samplepos\n", shm->samplepos);
 105         Con_Printf("%5d samplebits\n", shm->format.width * 8);
 106         Con_Printf("%5d speed\n", shm->format.speed);
 107         Con_Printf("%p dma buffer\n", shm->buffer);
 108         Con_Printf("%5u total_channels\n", total_channels);
 109 }
 110
 111
 112 void S_Startup(void)
 113 {
 114         if (!snd_initialized.integer)
 115                 return;
 116
 117         shm = &sn;
 118         memset((void *)shm, 0, sizeof(*shm));
 119
 120         // create a piece of DMA memory
 121         if (fakedma)
 122         {
 123                 shm->format.width = 2;
 124                 shm->format.speed = 22050;
 125                 shm->format.channels = 2;
 126                 shm->samples = 32768;
 127                 shm->samplepos = 0;
 128                 shm->buffer = Mem_Alloc(snd_mempool, shm->format.channels * shm->samples * shm->format.width);
 129         }
 130         else
 131         {
 132                 if (!SNDDMA_Init())
 133                 {
 134                         Con_Print("S_Startup: SNDDMA_Init failed.\n");
 135                         shm = NULL;
 136                         sound_started = false;
 137                         sound_spatialized = false;
 138                         return;
 139                 }
 140         }
 141
 142         sound_started = true;
 143
 144         Con_DPrintf("Sound sampling rate: %i\n", shm->format.speed);
 145
 146         S_StopAllSounds ();
 147 }
 148
 149 void S_Shutdown(void)
 150 {
 151         if (!sound_started)
 152                 return;
 153
 154         if (fakedma)
 155                 Mem_Free(shm->buffer);
 156         else
 157                 SNDDMA_Shutdown();
 158
 159         shm = NULL;
 160         sound_started = false;
 161         sound_spatialized = false;
 162 }
 163
 164 void S_Restart_f(void)
 165 {
 166         S_Shutdown();
 167         S_Startup();
 168 }
 169
 170 /*
 171 ================
 172 S_Init
 173 ================
 174 */
 175 void S_Init(void)
 176 {
 177         Con_DPrint("\nSound Initialization\n");
 178
 179         Cvar_RegisterVariable(&volume);
 180         Cvar_RegisterVariable(&bgmvolume);
 181         Cvar_RegisterVariable(&snd_staticvolume);
 182
 183 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
 184         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 185                 return;
 186
 187         snd_mempool = Mem_AllocPool("sound", 0, NULL);
 188
 189 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
 190         if (COM_CheckParm("-simsound"))
 191                 fakedma = true;
 192
 193         Cmd_AddCommand("play", S_Play);
 194         Cmd_AddCommand("play2", S_Play2);
 195         Cmd_AddCommand("playvol", S_PlayVol);
 196         Cmd_AddCommand("stopsound", S_StopAllSounds);
 197         Cmd_AddCommand("soundlist", S_SoundList);
 198         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 199         Cmd_AddCommand("snd_restart", S_Restart_f);
 200
 201         Cvar_RegisterVariable(&nosound);
 202         Cvar_RegisterVariable(&snd_precache);
 203         Cvar_RegisterVariable(&snd_initialized);
 204         Cvar_RegisterVariable(&snd_streaming);
 205         Cvar_RegisterVariable(&bgmbuffer);
 206         Cvar_RegisterVariable(&ambient_level);
 207         Cvar_RegisterVariable(&ambient_fade);
 208         Cvar_RegisterVariable(&snd_noextraupdate);
 209         Cvar_RegisterVariable(&snd_show);
 210         Cvar_RegisterVariable(&_snd_mixahead);
 211         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
 212
 213         Cvar_SetValueQuick(&snd_initialized, true);
 214
 215         known_sfx = NULL;
 216
 217         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 218         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 219
 220         OGG_OpenLibrary ();
 221 }
 222
 223
 224 // =======================================================================
 225 // Load a sound
 226 // =======================================================================
 227
 228 /*
 229 ==================
 230 S_FindName
 231
 232 ==================
 233 */
 234 sfx_t *S_FindName (const char *name)
 235 {
 236         sfx_t *sfx;
 237
 238         if (!snd_initialized.integer)
 239                 return NULL;
 240
 241         // Add the default sound directory to the path
 242         if (strlen (name) >= sizeof (sfx->name))
 243                 Host_Error ("S_FindName: sound name too long (%s)", name);
 244
 245         // Look for this sound in the list of known sfx
 246         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 247                 if(!strcmp (sfx->name, name))
 248                         return sfx;
 249
 250         // Add a sfx_t struct for this sound
 251         sfx = Mem_Alloc (snd_mempool, sizeof (*sfx));
 252         memset (sfx, 0, sizeof(*sfx));
 253         strlcpy (sfx->name, name, sizeof (sfx->name));
 254         sfx->next = known_sfx;
 255         known_sfx = sfx;
 256
 257         return sfx;
 258 }
 259
 260
 261 /*
 262 ==================
 263 S_FreeSfx
 264
 265 ==================
 266 */
 267 void S_FreeSfx (sfx_t *sfx)
 268 {
 269         // Never free a locked sfx
 270         if (sfx->locks > 0 || (sfx->flags & SFXFLAG_PERMANENTLOCK))
 271                 return;
 272
 273         Con_DPrintf ("S_FreeSfx: freeing %s\n", sfx->name);
 274
 275         // Remove it from the list of known sfx
 276         if (sfx == known_sfx)
 277                 known_sfx = known_sfx->next;
 278         else
 279         {
 280                 sfx_t *prev_sfx;
 281
 282                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
 283                         if (prev_sfx->next == sfx)
 284                         {
 285                                 prev_sfx->next = sfx->next;
 286                                 break;
 287                         }
 288                 if (prev_sfx == NULL)
 289                         Sys_Error ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
 290         }
 291
 292         // Free it
 293         Mem_FreePool (&sfx->mempool);
 294         Mem_Free (sfx);
 295 }
 296
 297
 298 /*
 299 ==================
 300 S_ServerSounds
 301
 302 ==================
 303 */
 304 void S_ServerSounds (char serversound [][MAX_QPATH], unsigned int numsounds)
 305 {
 306         sfx_t *sfx;
 307         unsigned int i;
 308
 309         // Start the ambient sounds and make them loop
 310         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
 311         {
 312                 // Precache it if it's not done (request a lock to make sure it will never be freed)
 313                 if (ambient_sfxs[i] == NULL)
 314                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, true);
 315                 if (ambient_sfxs[i] != NULL)
 316                 {
 317                         // Add a lock to the SFX while playing. It will be
 318                         // removed by S_StopAllSounds at the end of the level
 319                         S_LockSfx (ambient_sfxs[i]);
 320
 321                         channels[i].sfx = ambient_sfxs[i];
 322                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
 323                 }
 324         }
 325
 326         // Remove 1 lock from all sfx with the SFXFLAG_SERVERSOUND flag, and remove the flag
 327         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 328                 if (sfx->flags & SFXFLAG_SERVERSOUND)
 329                 {
 330                         S_UnlockSfx (sfx);
 331                         sfx->flags &= ~SFXFLAG_SERVERSOUND;
 332                 }
 333
 334         // Add 1 lock and the SFXFLAG_SERVERSOUND flag to each sfx in "serversound"
 335         for (i = 1; i < numsounds; i++)
 336         {
 337                 sfx = S_FindName (serversound[i]);
 338                 if (sfx != NULL)
 339                 {
 340                         S_LockSfx (sfx);
 341                         sfx->flags |= SFXFLAG_SERVERSOUND;
 342                 }
 343         }
 344
 345         // Free all unlocked sfx
 346         sfx = known_sfx;
 347         while (sfx != NULL)
 348         {
 349                 sfx_t* crtsfx;
 350
 351                 // We may lose the "next" pointer after S_FreeSfx
 352                 crtsfx = sfx;
 353                 sfx = sfx->next;
 354
 355                 S_FreeSfx (crtsfx);
 356         }
 357 }
 358
 359
 360 /*
 361 ==================
 362 S_PrecacheSound
 363
 364 ==================
 365 */
 366 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean lock)
 367 {
 368         sfx_t *sfx;
 369
 370         if (!snd_initialized.integer)
 371                 return NULL;
 372
 373         sfx = S_FindName (name);
 374         if (sfx == NULL)
 375                 return NULL;
 376
 377         if (lock)
 378                 S_LockSfx (sfx);
 379
 380         if (!nosound.integer && snd_precache.integer)
 381                 S_LoadSound(sfx, complain);
 382
 383         return sfx;
 384 }
 385
 386 /*
 387 ==================
 388 S_LockSfx
 389
 390 Add a lock to a SFX
 391 ==================
 392 */
 393 void S_LockSfx (sfx_t *sfx)
 394 {
 395         sfx->locks++;
 396 }
 397
 398 /*
 399 ==================
 400 S_UnlockSfx
 401
 402 Remove a lock from a SFX
 403 ==================
 404 */
 405 void S_UnlockSfx (sfx_t *sfx)
 406 {
 407         sfx->locks--;
 408 }
 409
 410
 411 //=============================================================================
 412
 413 /*
 414 =================
 415 SND_PickChannel
 416
 417 Picks a channel based on priorities, empty slots, number of channels
 418 =================
 419 */
 420 channel_t *SND_PickChannel(int entnum, int entchannel)
 421 {
 422         int ch_idx;
 423         int first_to_die;
 424         int life_left;
 425         channel_t* ch;
 426
 427 // Check for replacement sound, or find the best one to replace
 428         first_to_die = -1;
 429         life_left = 0x7fffffff;
 430         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 431         {
 432                 ch = &channels[ch_idx];
 433                 if (entchannel != 0             // channel 0 never overrides
 434                 && ch->entnum == entnum
 435                 && (ch->entchannel == entchannel || entchannel == -1) )
 436                 {       // always override sound from same entity
 437                         first_to_die = ch_idx;
 438                         break;
 439                 }
 440
 441                 // don't let monster sounds override player sounds
 442                 if (ch->entnum == cl.viewentity && entnum != cl.viewentity && ch->sfx)
 443                         continue;
 444
 445                 // don't override looped sounds
 446                 if ((ch->flags & CHANNELFLAG_FORCELOOP) != 0 ||
 447                         (ch->sfx != NULL && ch->sfx->loopstart >= 0))
 448                         continue;
 449
 450                 if (ch->end - paintedtime < life_left)
 451                 {
 452                         life_left = ch->end - paintedtime;
 453                         first_to_die = ch_idx;
 454                 }
 455         }
 456
 457         if (first_to_die == -1)
 458                 return NULL;
 459
 460         S_StopChannel (first_to_die);
 461
 462         return &channels[first_to_die];
 463 }
 464
 465 /*
 466 =================
 467 SND_Spatialize
 468
 469 Spatializes a channel
 470 =================
 471 */
 472 void SND_Spatialize(channel_t *ch, qboolean isstatic)
 473 {
 474         vec_t dist, scale, pan;
 475         vec3_t source_vec;
 476
 477         // anything coming from the view entity will always be full volume
 478         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 479         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 480         {
 481                 ch->leftvol = ch->master_vol;
 482                 ch->rightvol = ch->master_vol;
 483         }
 484         else
 485         {
 486                 // update sound origin if we know about the entity
 487                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 488                 {
 489                         //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]);
 490                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 491                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex] && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 492                                 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);
 493                 }
 494
 495                 // calculate stereo seperation and distance attenuation
 496                 Matrix4x4_Transform(&listener_matrix, ch->origin, source_vec);
 497                 dist = VectorNormalizeLength(source_vec);
 498                 // distance
 499                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 500                 // panning
 501                 pan = scale * source_vec[1];
 502                 // calculate the volumes
 503                 ch->leftvol = (int) (scale + pan);
 504                 ch->rightvol = (int) (scale - pan);
 505         }
 506
 507         // Adjust volume of static sounds
 508         if (isstatic)
 509         {
 510                 ch->leftvol *= snd_staticvolume.value;
 511                 ch->rightvol *= snd_staticvolume.value;
 512         }
 513
 514         // clamp volumes
 515         ch->leftvol = bound(0, ch->leftvol, 255);
 516         ch->rightvol = bound(0, ch->rightvol, 255);
 517 }
 518
 519
 520 // =======================================================================
 521 // Start a sound effect
 522 // =======================================================================
 523
 524 void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic)
 525 {
 526         // Initialize the channel
 527         memset (target_chan, 0, sizeof (*target_chan));
 528         VectorCopy (origin, target_chan->origin);
 529         target_chan->master_vol = fvol * 255;
 530         target_chan->sfx = sfx;
 531         target_chan->end = paintedtime + sfx->total_length;
 532         target_chan->lastptime = paintedtime;
 533         target_chan->flags = flags;
 534
 535         // If it's a static sound
 536         if (isstatic)
 537         {
 538                 if (sfx->loopstart == -1)
 539                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 540                 target_chan->dist_mult = attenuation / (64.0f * sound_nominal_clip_dist);
 541         }
 542         else
 543                 target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 544
 545         // Lock the SFX during play
 546         S_LockSfx (sfx);
 547 }
 548
 549
 550 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 551 {
 552         channel_t *target_chan, *check;
 553         int             ch_idx;
 554         size_t  skip;
 555
 556         if (!sound_started || !sfx || nosound.integer)
 557                 return -1;
 558         if (!sfx->fetcher)
 559         {
 560                 Con_DPrintf ("S_StartSound: \"%s\" hasn't been precached\n", sfx->name);
 561                 return -1;
 562         }
 563
 564         // Pick a channel to play on
 565         target_chan = SND_PickChannel(entnum, entchannel);
 566         if (!target_chan)
 567                 return -1;
 568
 569         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_NONE, origin, fvol, attenuation, false);
 570         target_chan->entnum = entnum;
 571         target_chan->entchannel = entchannel;
 572
 573         SND_Spatialize(target_chan, false);
 574
 575         // if an identical sound has also been started this frame, offset the pos
 576         // a bit to keep it from just making the first one louder
 577         check = &channels[NUM_AMBIENTS];
 578         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 579         {
 580                 if (check == target_chan)
 581                         continue;
 582                 if (check->sfx == sfx && !check->pos)
 583                 {
 584                         skip = 0.1 * sfx->format.speed;
 585                         if (skip > sfx->total_length)
 586                                 skip = sfx->total_length;
 587                         if (skip > 0)
 588                                 skip = rand() % skip;
 589                         target_chan->pos += skip;
 590                         target_chan->end -= skip;
 591                         break;
 592                 }
 593         }
 594
 595         return (target_chan - channels);
 596 }
 597
 598 void S_StopChannel (unsigned int channel_ind)
 599 {
 600         channel_t *ch;
 601
 602         if (channel_ind >= total_channels)
 603                 return;
 604
 605         ch = &channels[channel_ind];
 606         if (ch->sfx != NULL)
 607         {
 608                 sfx_t *sfx = ch->sfx;
 609
 610                 if (sfx->fetcher != NULL)
 611                 {
 612                         snd_fetcher_end_t fetcher_end = sfx->fetcher->end;
 613                         if (fetcher_end != NULL)
 614                                 fetcher_end (ch);
 615                 }
 616
 617                 // Remove the lock it holds
 618                 S_UnlockSfx (sfx);
 619
 620                 ch->sfx = NULL;
 621         }
 622         ch->end = 0;
 623 }
 624
 625
 626 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
 627 {
 628         if (ch_ind >= total_channels)
 629                 return false;
 630
 631         if (flag != CHANNELFLAG_FORCELOOP &&
 632                 flag != CHANNELFLAG_PAUSED &&
 633                 flag != CHANNELFLAG_FULLVOLUME)
 634                 return false;
 635
 636         if (value)
 637                 channels[ch_ind].flags |= flag;
 638         else
 639                 channels[ch_ind].flags &= ~flag;
 640
 641         return true;
 642 }
 643
 644 void S_StopSound(int entnum, int entchannel)
 645 {
 646         unsigned int i;
 647
 648         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
 649                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
 650                 {
 651                         S_StopChannel (i);
 652                         return;
 653                 }
 654 }
 655
 656 void S_StopAllSounds (void)
 657 {
 658         unsigned int i;
 659
 660         for (i = 0; i < total_channels; i++)
 661                 S_StopChannel (i);
 662
 663         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 664         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 665
 666         S_ClearBuffer ();
 667 }
 668
 669 void S_PauseGameSounds (qboolean toggle)
 670 {
 671         unsigned int i;
 672
 673         for (i = 0; i < total_channels; i++)
 674         {
 675                 channel_t *ch;
 676
 677                 ch = &channels[i];
 678                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
 679                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
 680         }
 681 }
 682
 683 void S_SetChannelVolume (unsigned int ch_ind, float fvol)
 684 {
 685         channels[ch_ind].master_vol = fvol * 255;
 686 }
 687
 688
 689 void S_ClearBuffer(void)
 690 {
 691         int     clear;
 692         unsigned char *pbuf;
 693
 694         if (!sound_started || !shm)
 695                 return;
 696
 697         if (shm->format.width == 1)
 698                 clear = 0x80;   // 8 bit sound (unsigned)
 699         else
 700                 clear = 0;              // 16 bit sound (signed)
 701
 702         pbuf = S_LockBuffer();
 703         if (pbuf != NULL)
 704         {
 705                 int setsize = shm->samples * shm->format.width;
 706
 707                 while (setsize--)
 708                         *pbuf++ = clear;
 709
 710                 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 711                 // reads the memory area before writing to it causing a seg fault
 712                 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 713                 //memset(shm->buffer, clear, shm->samples * shm->format.width);
 714
 715                 S_UnlockBuffer ();
 716         }
 717 }
 718
 719
 720 /*
 721 =================
 722 S_StaticSound
 723 =================
 724 */
 725 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 726 {
 727         channel_t       *target_chan;
 728
 729         if (!sound_started || !sfx || nosound.integer)
 730                 return;
 731         if (!sfx->fetcher)
 732         {
 733                 Con_DPrintf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
 734                 return;
 735         }
 736
 737         if (total_channels == MAX_CHANNELS)
 738         {
 739                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
 740                 return;
 741         }
 742
 743         target_chan = &channels[total_channels++];
 744         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true);
 745
 746         SND_Spatialize (target_chan, true);
 747 }
 748
 749
 750 //=============================================================================
 751
 752 /*
 753 ===================
 754 S_UpdateAmbientSounds
 755
 756 ===================
 757 */
 758 void S_UpdateAmbientSounds (void)
 759 {
 760         float           vol;
 761         int                     ambient_channel;
 762         channel_t       *chan;
 763         qbyte           ambientlevels[NUM_AMBIENTS];
 764
 765         // Mute ambient sounds until proven otherwise
 766         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 767                 channels[ambient_channel].master_vol = 0;
 768
 769         if (ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 770                 return;
 771
 772         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
 773
 774         // Calc ambient sound levels
 775         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 776         {
 777                 chan = &channels[ambient_channel];
 778                 if (chan->sfx == NULL || (chan->sfx->flags & SFXFLAG_FILEMISSING))
 779                         continue;
 780
 781                 vol = ambient_level.value * ambientlevels[ambient_channel];
 782                 if (vol < 8)
 783                         vol = 0;
 784
 785                 // Don't adjust volume too fast
 786                 if (chan->master_vol < vol)
 787                 {
 788                         chan->master_vol += host_realframetime * ambient_fade.value;
 789                         if (chan->master_vol > vol)
 790                                 chan->master_vol = vol;
 791                 }
 792                 else if (chan->master_vol > vol)
 793                 {
 794                         chan->master_vol -= host_realframetime * ambient_fade.value;
 795                         if (chan->master_vol < vol)
 796                                 chan->master_vol = vol;
 797                 }
 798
 799                 chan->leftvol = chan->rightvol = chan->master_vol;
 800         }
 801 }
 802
 803
 804 /*
 805 ============
 806 S_Update
 807
 808 Called once each time through the main loop
 809 ============
 810 */
 811 void S_Update(const matrix4x4_t *listenermatrix)
 812 {
 813         unsigned int i, j, total;
 814         channel_t *ch, *combine;
 815
 816         if (!snd_initialized.integer || (snd_blocked > 0))
 817                 return;
 818
 819         Matrix4x4_Invert_Simple(&listener_matrix, listenermatrix);
 820         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
 821
 822         // update general area ambient sound sources
 823         S_UpdateAmbientSounds ();
 824
 825         combine = NULL;
 826
 827         // update spatialization for static and dynamic sounds
 828         ch = channels+NUM_AMBIENTS;
 829         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 830         {
 831                 if (!ch->sfx)
 832                         continue;
 833                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 834                 if (!ch->leftvol && !ch->rightvol)
 835                         continue;
 836
 837                 // try to combine static sounds with a previous channel of the same
 838                 // sound effect so we don't mix five torches every frame
 839                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 840                 {
 841                         // see if it can just use the last one
 842                         if (combine && combine->sfx == ch->sfx)
 843                         {
 844                                 combine->leftvol += ch->leftvol;
 845                                 combine->rightvol += ch->rightvol;
 846                                 ch->leftvol = ch->rightvol = 0;
 847                                 continue;
 848                         }
 849                         // search for one
 850                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 851                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 852                                 if (combine->sfx == ch->sfx)
 853                                         break;
 854
 855                         if (j == total_channels)
 856                                 combine = NULL;
 857                         else
 858                         {
 859                                 if (combine != ch)
 860                                 {
 861                                         combine->leftvol += ch->leftvol;
 862                                         combine->rightvol += ch->rightvol;
 863                                         ch->leftvol = ch->rightvol = 0;
 864                                 }
 865                                 continue;
 866                         }
 867                 }
 868         }
 869
 870         sound_spatialized = true;
 871
 872         // debugging output
 873         if (snd_show.integer)
 874         {
 875                 total = 0;
 876                 ch = channels;
 877                 for (i=0 ; i<total_channels; i++, ch++)
 878                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 879                                 total++;
 880
 881                 Con_Printf("----(%u)----\n", total);
 882         }
 883
 884         S_Update_();
 885 }
 886
 887 void GetSoundtime(void)
 888 {
 889         int             samplepos;
 890         static  int             buffers;
 891         static  int             oldsamplepos;
 892         int             fullsamples;
 893
 894         fullsamples = shm->samples / shm->format.channels;
 895
 896         // it is possible to miscount buffers if it has wrapped twice between
 897         // calls to S_Update.  Oh well.
 898         samplepos = SNDDMA_GetDMAPos();
 899
 900         if (samplepos < oldsamplepos)
 901         {
 902                 buffers++;                                      // buffer wrapped
 903
 904                 if (paintedtime > 0x40000000)
 905                 {       // time to chop things off to avoid 32 bit limits
 906                         buffers = 0;
 907                         paintedtime = fullsamples;
 908                         S_StopAllSounds ();
 909                 }
 910         }
 911         oldsamplepos = samplepos;
 912
 913         soundtime = buffers * fullsamples + samplepos / shm->format.channels;
 914 }
 915
 916 void S_ExtraUpdate (void)
 917 {
 918         if (snd_noextraupdate.integer || !sound_spatialized)
 919                 return;
 920
 921         S_Update_();
 922 }
 923
 924 void S_Update_(void)
 925 {
 926         unsigned        endtime;
 927         int                             samps;
 928
 929         if (!sound_started || (snd_blocked > 0))
 930                 return;
 931
 932         // Updates DMA time
 933         GetSoundtime();
 934
 935         // check to make sure that we haven't overshot
 936         if (paintedtime < soundtime)
 937                 paintedtime = soundtime;
 938
 939         // mix ahead of current position
 940         endtime = soundtime + _snd_mixahead.value * shm->format.speed;
 941         samps = shm->samples >> (shm->format.channels - 1);
 942         if (endtime > (unsigned int)(soundtime + samps))
 943                 endtime = soundtime + samps;
 944
 945         S_PaintChannels (endtime);
 946
 947         SNDDMA_Submit ();
 948 }
 949
 950 /*
 951 ===============================================================================
 952
 953 console functions
 954
 955 ===============================================================================
 956 */
 957
 958 static void S_Play_Common(float fvol, float attenuation)
 959 {
 960         int     i, ch_ind;
 961         char name[256];
 962         sfx_t   *sfx;
 963
 964         i = 1;
 965         while (i<Cmd_Argc())
 966         {
 967                 // Get the name
 968                 strlcpy(name, Cmd_Argv(i), sizeof(name));
 969                 if (!strrchr(name, '.'))
 970                         strlcat(name, ".wav", sizeof(name));
 971                 i++;
 972
 973                 // If we need to get the volume from the command line
 974                 if (fvol == -1.0f)
 975                 {
 976                         fvol = atof(Cmd_Argv(i));
 977                         i++;
 978                 }
 979
 980                 sfx = S_PrecacheSound (name, true, false);
 981                 if (sfx)
 982                 {
 983                         ch_ind = S_StartSound(-1, 0, sfx, listener_origin, fvol, attenuation);
 984
 985                         // Free the sfx if the file didn't exist
 986                         if (ch_ind < 0)
 987                                 S_FreeSfx (sfx);
 988                         else
 989                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
 990                 }
 991         }
 992 }
 993
 994 void S_Play(void)
 995 {
 996         S_Play_Common (1.0f, 1.0f);
 997 }
 998
 999 void S_Play2(void)
1000 {
1001         S_Play_Common (1.0f, 0.0f);
1002 }
1003
1004 void S_PlayVol(void)
1005 {
1006         S_Play_Common (-1.0f, 0.0f);
1007 }
1008
1009 void S_SoundList(void)
1010 {
1011         unsigned int i;
1012         sfx_t   *sfx;
1013         int             size, total;
1014
1015         total = 0;
1016         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
1017         {
1018                 if (sfx->fetcher != NULL)
1019                 {
1020                         size = sfx->mempool->totalsize;
1021                         total += size;
1022                         Con_Printf ("%c%c%c%c(%2db, %6s) %8i : %s\n",
1023                                                 (sfx->loopstart >= 0) ? 'L' : ' ',
1024                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
1025                                                 (sfx->locks > 0) ? 'K' : ' ',
1026                                                 (sfx->flags & SFXFLAG_PERMANENTLOCK) ? 'P' : ' ',
1027                                                 sfx->format.width * 8,
1028                                                 (sfx->format.channels == 1) ? "mono" : "stereo",
1029                                                 size,
1030                                                 sfx->name);
1031                 }
1032                 else
1033                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
1034         }
1035         Con_Printf("Total resident: %i\n", total);
1036 }
1037
1038
1039 qboolean S_LocalSound (const char *sound)
1040 {
1041         sfx_t   *sfx;
1042         int             ch_ind;
1043
1044         if (!snd_initialized.integer || nosound.integer)
1045                 return true;
1046
1047         sfx = S_PrecacheSound (sound, true, false);
1048         if (!sfx)
1049         {
1050                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1051                 return false;
1052         }
1053
1054         // Local sounds must not be freed
1055         sfx->flags |= SFXFLAG_PERMANENTLOCK;
1056
1057         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 1);
1058         if (ch_ind < 0)
1059                 return false;
1060
1061         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1062         return true;
1063 }