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
  35 // =======================================================================
  36 // Internal sound data & structures
  37 // =======================================================================
  38
  39 channel_t channels[MAX_CHANNELS];
  40 unsigned int total_channels;
  41
  42 int snd_blocked = 0;
  43 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
  44 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1"};
  45
  46 volatile dma_t *shm = 0;
  47 volatile dma_t sn;
  48
  49 vec3_t listener_origin;
  50 matrix4x4_t listener_matrix;
  51 vec_t sound_nominal_clip_dist=1000.0;
  52 mempool_t *snd_mempool;
  53
  54 int soundtime;
  55 int paintedtime;
  56
  57 // Linked list of known sfx
  58 sfx_t *known_sfx = NULL;
  59
  60 qboolean sound_started = false;
  61 qboolean sound_spatialized = false;
  62
  63 // Fake dma is a synchronous faking of the DMA progress used for
  64 // isolating performance in the renderer.
  65 qboolean fakedma = false;
  66
  67 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  68 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  69 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  70
  71 cvar_t nosound = {0, "nosound", "0"};
  72 cvar_t snd_precache = {0, "snd_precache", "1"};
  73 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  74 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  75 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  76 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  77 cvar_t snd_show = {0, "snd_show", "0"};
  78 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  79 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  80
  81 // Ambient sounds
  82 sfx_t* ambient_sfxs [2] = { NULL, NULL };
  83 const char* ambient_names [2] = { "sound/ambience/water1.wav", "sound/ambience/wind2.wav" };
  84
  85
  86 // ====================================================================
  87 // Functions
  88 // ====================================================================
  89
  90 void S_FreeSfx (sfx_t *sfx, qboolean force);
  91
  92
  93 void S_SoundInfo_f(void)
  94 {
  95         if (!sound_started)
  96         {
  97                 Con_Print("sound system not started\n");
  98                 return;
  99         }
 100
 101         Con_Printf("%5d stereo\n", shm->format.channels - 1);
 102         Con_Printf("%5d samples\n", shm->samples);
 103         Con_Printf("%5d samplepos\n", shm->samplepos);
 104         Con_Printf("%5d samplebits\n", shm->format.width * 8);
 105         Con_Printf("%5d speed\n", shm->format.speed);
 106         Con_Printf("%p dma buffer\n", shm->buffer);
 107         Con_Printf("%5u total_channels\n", total_channels);
 108 }
 109
 110
 111 void S_Startup(void)
 112 {
 113         if (!snd_initialized.integer)
 114                 return;
 115
 116         shm = &sn;
 117         memset((void *)shm, 0, sizeof(*shm));
 118
 119         // create a piece of DMA memory
 120         if (fakedma)
 121         {
 122                 shm->format.width = 2;
 123                 shm->format.speed = 22050;
 124                 shm->format.channels = 2;
 125                 shm->samples = 32768;
 126                 shm->samplepos = 0;
 127                 shm->buffer = Mem_Alloc(snd_mempool, shm->format.channels * shm->samples * shm->format.width);
 128         }
 129         else
 130         {
 131                 if (!SNDDMA_Init())
 132                 {
 133                         Con_Print("S_Startup: SNDDMA_Init failed.\n");
 134                         shm = NULL;
 135                         sound_started = false;
 136                         sound_spatialized = false;
 137                         return;
 138                 }
 139         }
 140
 141         sound_started = true;
 142
 143         Con_DPrintf("Sound sampling rate: %i\n", shm->format.speed);
 144 }
 145
 146 void S_Shutdown(void)
 147 {
 148         if (!sound_started)
 149                 return;
 150
 151         if (fakedma)
 152                 Mem_Free(shm->buffer);
 153         else
 154                 SNDDMA_Shutdown();
 155
 156         shm = NULL;
 157         sound_started = false;
 158         sound_spatialized = false;
 159 }
 160
 161 void S_Restart_f(void)
 162 {
 163         S_Shutdown();
 164         S_Startup();
 165 }
 166
 167 /*
 168 ================
 169 S_Init
 170 ================
 171 */
 172 void S_Init(void)
 173 {
 174         Con_DPrint("\nSound Initialization\n");
 175
 176         Cvar_RegisterVariable(&volume);
 177         Cvar_RegisterVariable(&bgmvolume);
 178         Cvar_RegisterVariable(&snd_staticvolume);
 179
 180 // COMMANDLINEOPTION: Sound: -nosound disables sound (including CD audio)
 181         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 182                 return;
 183
 184         snd_mempool = Mem_AllocPool("sound", 0, NULL);
 185
 186 // COMMANDLINEOPTION: Sound: -simsound runs sound mixing but with no output
 187         if (COM_CheckParm("-simsound"))
 188                 fakedma = true;
 189
 190         Cmd_AddCommand("play", S_Play);
 191         Cmd_AddCommand("play2", S_Play2);
 192         Cmd_AddCommand("playvol", S_PlayVol);
 193         Cmd_AddCommand("stopsound", S_StopAllSounds);
 194         Cmd_AddCommand("soundlist", S_SoundList);
 195         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 196         Cmd_AddCommand("snd_restart", S_Restart_f);
 197
 198         Cvar_RegisterVariable(&nosound);
 199         Cvar_RegisterVariable(&snd_precache);
 200         Cvar_RegisterVariable(&snd_initialized);
 201         Cvar_RegisterVariable(&snd_streaming);
 202         Cvar_RegisterVariable(&bgmbuffer);
 203         Cvar_RegisterVariable(&ambient_level);
 204         Cvar_RegisterVariable(&ambient_fade);
 205         Cvar_RegisterVariable(&snd_noextraupdate);
 206         Cvar_RegisterVariable(&snd_show);
 207         Cvar_RegisterVariable(&_snd_mixahead);
 208         Cvar_RegisterVariable(&snd_swapstereo); // for people with backwards sound wiring
 209
 210         Cvar_SetValueQuick(&snd_initialized, true);
 211
 212         known_sfx = NULL;
 213
 214         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 215         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 216
 217         OGG_OpenLibrary ();
 218 }
 219
 220
 221 /*
 222 ================
 223 S_Terminate
 224
 225 Shutdown and free all resources
 226 ================
 227 */
 228 void S_Terminate (void)
 229 {
 230         S_Shutdown ();
 231         OGG_CloseLibrary ();
 232
 233         // Free all SFXs
 234         while (known_sfx != NULL)
 235                 S_FreeSfx (known_sfx, true);
 236
 237         Cvar_SetValueQuick (&snd_initialized, false);
 238         Mem_FreePool (&snd_mempool);
 239 }
 240
 241
 242 // =======================================================================
 243 // Load a sound
 244 // =======================================================================
 245
 246 /*
 247 ==================
 248 S_FindName
 249
 250 ==================
 251 */
 252 sfx_t *S_FindName (const char *name)
 253 {
 254         sfx_t *sfx;
 255
 256         if (!snd_initialized.integer)
 257                 return NULL;
 258
 259         if (strlen (name) >= sizeof (sfx->name))
 260                 Host_Error ("S_FindName: sound name too long (%s)", name);
 261
 262         // Look for this sound in the list of known sfx
 263         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 264                 if(!strcmp (sfx->name, name))
 265                         return sfx;
 266
 267         // Add a sfx_t struct for this sound
 268         sfx = Mem_Alloc (snd_mempool, sizeof (*sfx));
 269         memset (sfx, 0, sizeof(*sfx));
 270         strlcpy (sfx->name, name, sizeof (sfx->name));
 271         sfx->next = known_sfx;
 272         known_sfx = sfx;
 273
 274         return sfx;
 275 }
 276
 277
 278 /*
 279 ==================
 280 S_FreeSfx
 281
 282 ==================
 283 */
 284 void S_FreeSfx (sfx_t *sfx, qboolean force)
 285 {
 286         // Never free a locked sfx unless forced
 287         if (!force && (sfx->locks > 0 || (sfx->flags & SFXFLAG_PERMANENTLOCK)))
 288                 return;
 289
 290         Con_DPrintf ("S_FreeSfx: freeing %s\n", sfx->name);
 291
 292         // Remove it from the list of known sfx
 293         if (sfx == known_sfx)
 294                 known_sfx = known_sfx->next;
 295         else
 296         {
 297                 sfx_t *prev_sfx;
 298
 299                 for (prev_sfx = known_sfx; prev_sfx != NULL; prev_sfx = prev_sfx->next)
 300                         if (prev_sfx->next == sfx)
 301                         {
 302                                 prev_sfx->next = sfx->next;
 303                                 break;
 304                         }
 305                 if (prev_sfx == NULL)
 306                 {
 307                         Con_Printf ("S_FreeSfx: Can't find SFX %s in the list!\n", sfx->name);
 308                         return;
 309                 }
 310         }
 311
 312         // Free it
 313         Mem_FreePool (&sfx->mempool);
 314         Mem_Free (sfx);
 315 }
 316
 317
 318 /*
 319 ==================
 320 S_ServerSounds
 321
 322 ==================
 323 */
 324 void S_ServerSounds (char serversound [][MAX_QPATH], unsigned int numsounds)
 325 {
 326         sfx_t *sfx;
 327         sfx_t *sfxnext;
 328         unsigned int i;
 329
 330         // Start the ambient sounds and make them loop
 331         for (i = 0; i < sizeof (ambient_sfxs) / sizeof (ambient_sfxs[0]); i++)
 332         {
 333                 // Precache it if it's not done (request a lock to make sure it will never be freed)
 334                 if (ambient_sfxs[i] == NULL)
 335                         ambient_sfxs[i] = S_PrecacheSound (ambient_names[i], false, true);
 336                 if (ambient_sfxs[i] != NULL)
 337                 {
 338                         // Add a lock to the SFX while playing. It will be
 339                         // removed by S_StopAllSounds at the end of the level
 340                         S_LockSfx (ambient_sfxs[i]);
 341
 342                         channels[i].sfx = ambient_sfxs[i];
 343                         channels[i].flags |= CHANNELFLAG_FORCELOOP;
 344                         channels[i].master_vol = 0;
 345                 }
 346         }
 347
 348         // Remove 1 lock from all sfx with the SFXFLAG_SERVERSOUND flag, and remove the flag
 349         for (sfx = known_sfx; sfx != NULL; sfx = sfx->next)
 350                 if (sfx->flags & SFXFLAG_SERVERSOUND)
 351                 {
 352                         S_UnlockSfx (sfx);
 353                         sfx->flags &= ~SFXFLAG_SERVERSOUND;
 354                 }
 355
 356         // Add 1 lock and the SFXFLAG_SERVERSOUND flag to each sfx in "serversound"
 357         for (i = 1; i < numsounds; i++)
 358         {
 359                 sfx = S_FindName (serversound[i]);
 360                 if (sfx != NULL)
 361                 {
 362                         S_LockSfx (sfx);
 363                         sfx->flags |= SFXFLAG_SERVERSOUND;
 364                 }
 365         }
 366
 367         // Free all unlocked sfx
 368         for (sfx = known_sfx;sfx;sfx = sfxnext)
 369         {
 370                 sfxnext = sfx->next;
 371                 S_FreeSfx (sfx, false);
 372         }
 373 }
 374
 375
 376 /*
 377 ==================
 378 S_PrecacheSound
 379
 380 ==================
 381 */
 382 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean lock)
 383 {
 384         sfx_t *sfx;
 385
 386         if (!snd_initialized.integer)
 387                 return NULL;
 388
 389         sfx = S_FindName (name);
 390         if (sfx == NULL)
 391                 return NULL;
 392
 393         if (lock)
 394                 S_LockSfx (sfx);
 395
 396         if (!nosound.integer && snd_precache.integer)
 397                 S_LoadSound(sfx, complain);
 398
 399         return sfx;
 400 }
 401
 402 /*
 403 ==================
 404 S_LockSfx
 405
 406 Add a lock to a SFX
 407 ==================
 408 */
 409 void S_LockSfx (sfx_t *sfx)
 410 {
 411         sfx->locks++;
 412 }
 413
 414 /*
 415 ==================
 416 S_UnlockSfx
 417
 418 Remove a lock from a SFX
 419 ==================
 420 */
 421 void S_UnlockSfx (sfx_t *sfx)
 422 {
 423         sfx->locks--;
 424 }
 425
 426
 427 //=============================================================================
 428
 429 /*
 430 =================
 431 SND_PickChannel
 432
 433 Picks a channel based on priorities, empty slots, number of channels
 434 =================
 435 */
 436 channel_t *SND_PickChannel(int entnum, int entchannel)
 437 {
 438         int ch_idx;
 439         int first_to_die;
 440         int life_left;
 441         channel_t* ch;
 442
 443 // Check for replacement sound, or find the best one to replace
 444         first_to_die = -1;
 445         life_left = 0x7fffffff;
 446         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 447         {
 448                 ch = &channels[ch_idx];
 449                 if (entchannel != 0             // channel 0 never overrides
 450                 && ch->entnum == entnum
 451                 && (ch->entchannel == entchannel || entchannel == -1) )
 452                 {       // always override sound from same entity
 453                         first_to_die = ch_idx;
 454                         break;
 455                 }
 456
 457                 // don't let monster sounds override player sounds
 458                 if (ch->entnum == cl.viewentity && entnum != cl.viewentity && ch->sfx)
 459                         continue;
 460
 461                 // don't override looped sounds
 462                 if ((ch->flags & CHANNELFLAG_FORCELOOP) != 0 ||
 463                         (ch->sfx != NULL && ch->sfx->loopstart >= 0))
 464                         continue;
 465
 466                 if (ch->end - paintedtime < life_left)
 467                 {
 468                         life_left = ch->end - paintedtime;
 469                         first_to_die = ch_idx;
 470                 }
 471         }
 472
 473         if (first_to_die == -1)
 474                 return NULL;
 475
 476         S_StopChannel (first_to_die);
 477
 478         return &channels[first_to_die];
 479 }
 480
 481 /*
 482 =================
 483 SND_Spatialize
 484
 485 Spatializes a channel
 486 =================
 487 */
 488 void SND_Spatialize(channel_t *ch, qboolean isstatic)
 489 {
 490         vec_t dist, scale, pan;
 491         vec3_t source_vec;
 492
 493         // anything coming from the view entity will always be full volume
 494         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 495         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 496         {
 497                 ch->leftvol = ch->master_vol;
 498                 ch->rightvol = ch->master_vol;
 499         }
 500         else
 501         {
 502                 // update sound origin if we know about the entity
 503                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].render.model)
 504                 {
 505                         //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].persistent.trail_origin[0], cl_entities[ch->entnum].persistent.trail_origin[1], cl_entities[ch->entnum].persistent.trail_origin[2]);
 506                         VectorCopy(cl_entities[ch->entnum].persistent.trail_origin, ch->origin);
 507                 }
 508
 509                 // calculate stereo seperation and distance attenuation
 510                 Matrix4x4_Transform(&listener_matrix, ch->origin, source_vec);
 511                 dist = VectorNormalizeLength(source_vec);
 512                 // distance
 513                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 514                 // panning
 515                 pan = scale * source_vec[1];
 516                 // calculate the volumes
 517                 ch->leftvol = (int) (scale + pan);
 518                 ch->rightvol = (int) (scale - pan);
 519                 //Con_Printf("%f %f %f:%f %f %f:%f %f:%d %d\n", ch->origin[0], ch->origin[1], ch->origin[2], source_vec[0], source_vec[1], source_vec[2], scale, pan, ch->leftvol, ch->rightvol);
 520         }
 521
 522         // Adjust volume of static sounds
 523         if (isstatic)
 524         {
 525                 ch->leftvol *= snd_staticvolume.value;
 526                 ch->rightvol *= snd_staticvolume.value;
 527         }
 528
 529         // clamp volumes
 530         ch->leftvol = bound(0, ch->leftvol, 255);
 531         ch->rightvol = bound(0, ch->rightvol, 255);
 532 }
 533
 534
 535 // =======================================================================
 536 // Start a sound effect
 537 // =======================================================================
 538
 539 void S_PlaySfxOnChannel (sfx_t *sfx, channel_t *target_chan, unsigned int flags, vec3_t origin, float fvol, float attenuation, qboolean isstatic)
 540 {
 541         // Initialize the channel
 542         memset (target_chan, 0, sizeof (*target_chan));
 543         VectorCopy (origin, target_chan->origin);
 544         target_chan->master_vol = fvol * 255;
 545         target_chan->sfx = sfx;
 546         target_chan->end = paintedtime + sfx->total_length;
 547         target_chan->lastptime = paintedtime;
 548         target_chan->flags = flags;
 549
 550         // If it's a static sound
 551         if (isstatic)
 552         {
 553                 if (sfx->loopstart == -1)
 554                         Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 555                 target_chan->dist_mult = attenuation / (64.0f * sound_nominal_clip_dist);
 556         }
 557         else
 558                 target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 559
 560         // Lock the SFX during play
 561         S_LockSfx (sfx);
 562 }
 563
 564
 565 int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 566 {
 567         channel_t *target_chan, *check;
 568         int             ch_idx;
 569         size_t  skip;
 570
 571         if (!sound_started || !sfx || nosound.integer)
 572                 return -1;
 573         if (!sfx->fetcher)
 574         {
 575                 Con_DPrintf ("S_StartSound: \"%s\" hasn't been precached\n", sfx->name);
 576                 return -1;
 577         }
 578
 579         if (entnum && entnum >= cl_max_entities)
 580                 CL_ExpandEntities(entnum);
 581
 582         // Pick a channel to play on
 583         target_chan = SND_PickChannel(entnum, entchannel);
 584         if (!target_chan)
 585                 return -1;
 586
 587         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_NONE, origin, fvol, attenuation, false);
 588         target_chan->entnum = entnum;
 589         target_chan->entchannel = entchannel;
 590
 591         SND_Spatialize(target_chan, false);
 592
 593         // if an identical sound has also been started this frame, offset the pos
 594         // a bit to keep it from just making the first one louder
 595         check = &channels[NUM_AMBIENTS];
 596         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 597         {
 598                 if (check == target_chan)
 599                         continue;
 600                 if (check->sfx == sfx && !check->pos)
 601                 {
 602                         skip = 0.1 * sfx->format.speed;
 603                         if (skip > sfx->total_length)
 604                                 skip = sfx->total_length;
 605                         if (skip > 0)
 606                                 skip = rand() % skip;
 607                         target_chan->pos += skip;
 608                         target_chan->end -= skip;
 609                         break;
 610                 }
 611         }
 612
 613         return (target_chan - channels);
 614 }
 615
 616 void S_StopChannel (unsigned int channel_ind)
 617 {
 618         channel_t *ch;
 619
 620         if (channel_ind >= total_channels)
 621                 return;
 622
 623         ch = &channels[channel_ind];
 624         if (ch->sfx != NULL)
 625         {
 626                 sfx_t *sfx = ch->sfx;
 627
 628                 if (sfx->fetcher != NULL)
 629                 {
 630                         snd_fetcher_end_t fetcher_end = sfx->fetcher->end;
 631                         if (fetcher_end != NULL)
 632                                 fetcher_end (ch);
 633                 }
 634
 635                 // Remove the lock it holds
 636                 S_UnlockSfx (sfx);
 637
 638                 ch->sfx = NULL;
 639         }
 640         ch->end = 0;
 641 }
 642
 643
 644 qboolean S_SetChannelFlag (unsigned int ch_ind, unsigned int flag, qboolean value)
 645 {
 646         if (ch_ind >= total_channels)
 647                 return false;
 648
 649         if (flag != CHANNELFLAG_FORCELOOP &&
 650                 flag != CHANNELFLAG_PAUSED &&
 651                 flag != CHANNELFLAG_FULLVOLUME)
 652                 return false;
 653
 654         if (value)
 655                 channels[ch_ind].flags |= flag;
 656         else
 657                 channels[ch_ind].flags &= ~flag;
 658
 659         return true;
 660 }
 661
 662 void S_StopSound(int entnum, int entchannel)
 663 {
 664         unsigned int i;
 665
 666         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
 667                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
 668                 {
 669                         S_StopChannel (i);
 670                         return;
 671                 }
 672 }
 673
 674 void S_StopAllSounds (void)
 675 {
 676         unsigned int i;
 677         unsigned char *pbuf;
 678
 679         if (!sound_started)
 680                 return;
 681
 682         for (i = 0; i < total_channels; i++)
 683                 S_StopChannel (i);
 684
 685         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 686         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 687
 688         // Clear sound buffer
 689         pbuf = S_LockBuffer();
 690         if (pbuf != NULL)
 691         {
 692                 int setsize = shm->samples * shm->format.width;
 693                 int     clear = (shm->format.width == 1) ? 0x80 : 0;
 694
 695                 // FIXME: is it (still) true? (check with OSS and ALSA)
 696                 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 697                 // reads the memory area before writing to it causing a seg fault
 698                 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 699                 //memset(shm->buffer, clear, shm->samples * shm->format.width);
 700                 while (setsize--)
 701                         *pbuf++ = clear;
 702
 703                 S_UnlockBuffer ();
 704         }
 705 }
 706
 707 void S_PauseGameSounds (qboolean toggle)
 708 {
 709         unsigned int i;
 710
 711         for (i = 0; i < total_channels; i++)
 712         {
 713                 channel_t *ch;
 714
 715                 ch = &channels[i];
 716                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
 717                         S_SetChannelFlag (i, CHANNELFLAG_PAUSED, toggle);
 718         }
 719 }
 720
 721 void S_SetChannelVolume (unsigned int ch_ind, float fvol)
 722 {
 723         channels[ch_ind].master_vol = fvol * 255;
 724 }
 725
 726
 727 /*
 728 =================
 729 S_StaticSound
 730 =================
 731 */
 732 void S_StaticSound (sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 733 {
 734         channel_t       *target_chan;
 735
 736         if (!sound_started || !sfx || nosound.integer)
 737                 return;
 738         if (!sfx->fetcher)
 739         {
 740                 Con_DPrintf ("S_StaticSound: \"%s\" hasn't been precached\n", sfx->name);
 741                 return;
 742         }
 743
 744         if (total_channels == MAX_CHANNELS)
 745         {
 746                 Con_Print("S_StaticSound: total_channels == MAX_CHANNELS\n");
 747                 return;
 748         }
 749
 750         target_chan = &channels[total_channels++];
 751         S_PlaySfxOnChannel (sfx, target_chan, CHANNELFLAG_FORCELOOP, origin, fvol, attenuation, true);
 752
 753         SND_Spatialize (target_chan, true);
 754 }
 755
 756
 757 //=============================================================================
 758
 759 /*
 760 ===================
 761 S_UpdateAmbientSounds
 762
 763 ===================
 764 */
 765 void S_UpdateAmbientSounds (void)
 766 {
 767         float           vol;
 768         int                     ambient_channel;
 769         channel_t       *chan;
 770         qbyte           ambientlevels[NUM_AMBIENTS];
 771
 772         if (ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 773                 return;
 774
 775         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
 776
 777         // Calc ambient sound levels
 778         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 779         {
 780                 chan = &channels[ambient_channel];
 781                 if (chan->sfx == NULL || chan->sfx->fetcher == NULL)
 782                         continue;
 783
 784                 vol = ambient_level.value * ambientlevels[ambient_channel];
 785                 if (vol < 8)
 786                         vol = 0;
 787
 788                 // Don't adjust volume too fast
 789                 if (chan->master_vol < vol)
 790                 {
 791                         chan->master_vol += host_realframetime * ambient_fade.value;
 792                         if (chan->master_vol > vol)
 793                                 chan->master_vol = vol;
 794                 }
 795                 else if (chan->master_vol > vol)
 796                 {
 797                         chan->master_vol -= host_realframetime * ambient_fade.value;
 798                         if (chan->master_vol < vol)
 799                                 chan->master_vol = vol;
 800                 }
 801
 802                 chan->leftvol = chan->rightvol = chan->master_vol;
 803         }
 804 }
 805
 806
 807 /*
 808 ============
 809 S_Update
 810
 811 Called once each time through the main loop
 812 ============
 813 */
 814 void S_Update(const matrix4x4_t *listenermatrix)
 815 {
 816         unsigned int i, j, total;
 817         channel_t *ch, *combine;
 818
 819         if (!snd_initialized.integer || (snd_blocked > 0))
 820                 return;
 821
 822         Matrix4x4_Invert_Simple(&listener_matrix, listenermatrix);
 823         Matrix4x4_OriginFromMatrix(listenermatrix, listener_origin);
 824
 825         // update general area ambient sound sources
 826         S_UpdateAmbientSounds ();
 827
 828         combine = NULL;
 829
 830         // update spatialization for static and dynamic sounds
 831         ch = channels+NUM_AMBIENTS;
 832         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 833         {
 834                 if (!ch->sfx)
 835                         continue;
 836                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 837                 if (!ch->leftvol && !ch->rightvol)
 838                         continue;
 839
 840                 // try to combine static sounds with a previous channel of the same
 841                 // sound effect so we don't mix five torches every frame
 842                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 843                 {
 844                         // see if it can just use the last one
 845                         if (combine && combine->sfx == ch->sfx)
 846                         {
 847                                 combine->leftvol += ch->leftvol;
 848                                 combine->rightvol += ch->rightvol;
 849                                 ch->leftvol = ch->rightvol = 0;
 850                                 continue;
 851                         }
 852                         // search for one
 853                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 854                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 855                                 if (combine->sfx == ch->sfx)
 856                                         break;
 857
 858                         if (j == total_channels)
 859                                 combine = NULL;
 860                         else
 861                         {
 862                                 if (combine != ch)
 863                                 {
 864                                         combine->leftvol += ch->leftvol;
 865                                         combine->rightvol += ch->rightvol;
 866                                         ch->leftvol = ch->rightvol = 0;
 867                                 }
 868                                 continue;
 869                         }
 870                 }
 871         }
 872
 873         sound_spatialized = true;
 874
 875         // debugging output
 876         if (snd_show.integer)
 877         {
 878                 total = 0;
 879                 ch = channels;
 880                 for (i=0 ; i<total_channels; i++, ch++)
 881                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 882                                 total++;
 883
 884                 Con_Printf("----(%u)----\n", total);
 885         }
 886
 887         S_Update_();
 888 }
 889
 890 void GetSoundtime(void)
 891 {
 892         int             samplepos;
 893         static  int             buffers;
 894         static  int             oldsamplepos;
 895         int             fullsamples;
 896
 897         fullsamples = shm->samples / shm->format.channels;
 898
 899         // it is possible to miscount buffers if it has wrapped twice between
 900         // calls to S_Update.  Oh well.
 901         samplepos = SNDDMA_GetDMAPos();
 902
 903         if (samplepos < oldsamplepos)
 904         {
 905                 buffers++;                                      // buffer wrapped
 906
 907                 if (paintedtime > 0x40000000)
 908                 {       // time to chop things off to avoid 32 bit limits
 909                         buffers = 0;
 910                         paintedtime = fullsamples;
 911                         S_StopAllSounds ();
 912                 }
 913         }
 914         oldsamplepos = samplepos;
 915
 916         soundtime = buffers * fullsamples + samplepos / shm->format.channels;
 917 }
 918
 919 void S_ExtraUpdate (void)
 920 {
 921         if (snd_noextraupdate.integer || !sound_spatialized)
 922                 return;
 923
 924         S_Update_();
 925 }
 926
 927 void S_Update_(void)
 928 {
 929         unsigned        endtime;
 930         int                             samps;
 931
 932         if (!sound_started || (snd_blocked > 0))
 933                 return;
 934
 935         // Updates DMA time
 936         GetSoundtime();
 937
 938         // check to make sure that we haven't overshot
 939         if (paintedtime < soundtime)
 940                 paintedtime = soundtime;
 941
 942         // mix ahead of current position
 943         endtime = soundtime + _snd_mixahead.value * shm->format.speed;
 944         samps = shm->samples >> (shm->format.channels - 1);
 945         if (endtime > (unsigned int)(soundtime + samps))
 946                 endtime = soundtime + samps;
 947
 948         S_PaintChannels (endtime);
 949
 950         SNDDMA_Submit ();
 951 }
 952
 953 /*
 954 ===============================================================================
 955
 956 console functions
 957
 958 ===============================================================================
 959 */
 960
 961 static void S_Play_Common(float fvol, float attenuation)
 962 {
 963         int     i, ch_ind;
 964         char name[256];
 965         sfx_t   *sfx;
 966
 967         i = 1;
 968         while (i<Cmd_Argc())
 969         {
 970                 // Get the name
 971                 strlcpy(name, Cmd_Argv(i), sizeof(name));
 972                 if (!strrchr(name, '.'))
 973                         strlcat(name, ".wav", sizeof(name));
 974                 i++;
 975
 976                 // If we need to get the volume from the command line
 977                 if (fvol == -1.0f)
 978                 {
 979                         fvol = atof(Cmd_Argv(i));
 980                         i++;
 981                 }
 982
 983                 sfx = S_PrecacheSound (name, true, false);
 984                 if (sfx)
 985                 {
 986                         ch_ind = S_StartSound(-1, 0, sfx, listener_origin, fvol, attenuation);
 987
 988                         // Free the sfx if the file didn't exist
 989                         if (ch_ind < 0)
 990                                 S_FreeSfx (sfx, false);
 991                         else
 992                                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
 993                 }
 994         }
 995 }
 996
 997 void S_Play(void)
 998 {
 999         S_Play_Common (1.0f, 1.0f);
1000 }
1001
1002 void S_Play2(void)
1003 {
1004         S_Play_Common (1.0f, 0.0f);
1005 }
1006
1007 void S_PlayVol(void)
1008 {
1009         S_Play_Common (-1.0f, 0.0f);
1010 }
1011
1012 void S_SoundList(void)
1013 {
1014         unsigned int i;
1015         sfx_t   *sfx;
1016         int             size, total;
1017
1018         total = 0;
1019         for (sfx = known_sfx, i = 0; sfx != NULL; sfx = sfx->next, i++)
1020         {
1021                 if (sfx->fetcher != NULL)
1022                 {
1023                         size = sfx->mempool->totalsize;
1024                         total += size;
1025                         Con_Printf ("%c%c%c%c(%2db, %6s) %8i : %s\n",
1026                                                 (sfx->loopstart >= 0) ? 'L' : ' ',
1027                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
1028                                                 (sfx->locks > 0) ? 'K' : ' ',
1029                                                 (sfx->flags & SFXFLAG_PERMANENTLOCK) ? 'P' : ' ',
1030                                                 sfx->format.width * 8,
1031                                                 (sfx->format.channels == 1) ? "mono" : "stereo",
1032                                                 size,
1033                                                 sfx->name);
1034                 }
1035                 else
1036                         Con_Printf ("    (  unknown  ) unloaded : %s\n", sfx->name);
1037         }
1038         Con_Printf("Total resident: %i\n", total);
1039 }
1040
1041
1042 qboolean S_LocalSound (const char *sound)
1043 {
1044         sfx_t   *sfx;
1045         int             ch_ind;
1046
1047         if (!snd_initialized.integer || nosound.integer)
1048                 return true;
1049
1050         sfx = S_PrecacheSound (sound, true, false);
1051         if (!sfx)
1052         {
1053                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1054                 return false;
1055         }
1056
1057         // Local sounds must not be freed
1058         sfx->flags |= SFXFLAG_PERMANENTLOCK;
1059
1060         ch_ind = S_StartSound (cl.viewentity, 0, sfx, vec3_origin, 1, 0);
1061         if (ch_ind < 0)
1062                 return false;
1063
1064         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1065         return true;
1066 }