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