snd_dma.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // snd_dma.c -- main control for any streaming sound output device
  21
  22 #include "quakedef.h"
  23
  24 #ifdef _WIN32
  25 #include <windows.h>
  26 #include <dsound.h>
  27 extern DWORD gSndBufSize;
  28 extern LPDIRECTSOUND pDS;
  29 extern LPDIRECTSOUNDBUFFER pDSBuf;
  30 #endif
  31
  32 #include "snd_ogg.h"
  33
  34
  35 void S_Play(void);
  36 void S_PlayVol(void);
  37 void S_Play2(void);
  38 void S_SoundList(void);
  39 void S_Update_();
  40 void S_StopAllSounds(qboolean clear);
  41 void S_StopAllSoundsC(void);
  42
  43 void S_ClearBuffer (void);
  44
  45
  46 // =======================================================================
  47 // Internal sound data & structures
  48 // =======================================================================
  49
  50 channel_t channels[MAX_CHANNELS];
  51 unsigned int total_channels;
  52
  53 int snd_blocked = 0;
  54 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
  55 cvar_t snd_streaming = { CVAR_SAVE, "snd_streaming", "1"};
  56
  57 // pointer should go away
  58 volatile dma_t *shm = 0;
  59 volatile dma_t sn;
  60
  61 vec3_t listener_vieworigin;
  62 vec3_t listener_viewforward;
  63 vec3_t listener_viewleft;
  64 vec3_t listener_viewup;
  65 vec_t sound_nominal_clip_dist=1000.0;
  66 mempool_t *snd_mempool;
  67
  68 // sample PAIRS
  69 int soundtime;
  70 int paintedtime;
  71
  72
  73 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
  74 #define MAX_SFX 4096
  75 sfx_t *known_sfx; // allocated [MAX_SFX]
  76 int num_sfx;
  77
  78 sfx_t *ambient_sfx[NUM_AMBIENTS];
  79
  80 int sound_started = 0;
  81
  82 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
  83 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
  84 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
  85
  86 cvar_t nosound = {0, "nosound", "0"};
  87 cvar_t snd_precache = {0, "snd_precache", "1"};
  88 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
  89 cvar_t ambient_level = {0, "ambient_level", "0.3"};
  90 cvar_t ambient_fade = {0, "ambient_fade", "100"};
  91 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
  92 cvar_t snd_show = {0, "snd_show", "0"};
  93 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
  94 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
  95
  96
  97 // ====================================================================
  98 // User-setable variables
  99 // ====================================================================
 100
 101
 102 //
 103 // Fake dma is a synchronous faking of the DMA progress used for
 104 // isolating performance in the renderer.  The fakedma_updates is
 105 // number of times S_Update() is called per second.
 106 //
 107
 108 qboolean fakedma = false;
 109 int fakedma_updates = 15;
 110
 111
 112 void S_SoundInfo_f(void)
 113 {
 114         if (!sound_started || !shm)
 115         {
 116                 Con_Print("sound system not started\n");
 117                 return;
 118         }
 119
 120         Con_Printf("%5d stereo\n", shm->format.channels - 1);
 121         Con_Printf("%5d samples\n", shm->samples);
 122         Con_Printf("%5d samplepos\n", shm->samplepos);
 123         Con_Printf("%5d samplebits\n", shm->format.width * 8);
 124         Con_Printf("%5d speed\n", shm->format.speed);
 125         Con_Printf("%p dma buffer\n", shm->buffer);
 126         Con_Printf("%5u total_channels\n", total_channels);
 127 }
 128
 129 void S_UnloadSounds(void)
 130 {
 131         int i;
 132         for (i = 0;i < num_sfx;i++)
 133                 S_UnloadSound(known_sfx + i);
 134 }
 135
 136 void S_LoadSounds(void)
 137 {
 138         int i;
 139         for (i = 0;i < num_sfx;i++)
 140                 S_LoadSound(known_sfx + i, false);
 141 }
 142
 143 void S_Startup(void)
 144 {
 145         if (!snd_initialized.integer)
 146                 return;
 147
 148         shm = &sn;
 149         memset((void *)shm, 0, sizeof(*shm));
 150
 151 // create a piece of DMA memory
 152
 153         if (fakedma)
 154         {
 155                 shm->format.width = 2;
 156                 shm->format.speed = 22050;
 157                 shm->format.channels = 2;
 158                 shm->samples = 32768;
 159                 shm->samplepos = 0;
 160                 shm->buffer = Mem_Alloc(snd_mempool, shm->format.channels * shm->samples * shm->format.width);
 161         }
 162         else
 163         {
 164                 if (!SNDDMA_Init())
 165                 {
 166                         Con_Print("S_Startup: SNDDMA_Init failed.\n");
 167                         sound_started = 0;
 168                         shm = NULL;
 169                         return;
 170                 }
 171         }
 172
 173         sound_started = 1;
 174
 175         Con_DPrintf("Sound sampling rate: %i\n", shm->format.speed);
 176
 177         //S_LoadSounds();
 178
 179         S_StopAllSounds(true);
 180 }
 181
 182 void S_Shutdown(void)
 183 {
 184         if (!sound_started)
 185                 return;
 186
 187         //S_UnloadSounds();
 188
 189         if (fakedma)
 190                 Mem_Free(shm->buffer);
 191         else
 192                 SNDDMA_Shutdown();
 193
 194         shm = NULL;
 195         sound_started = 0;
 196 }
 197
 198 void S_Restart_f(void)
 199 {
 200         S_Shutdown();
 201         S_Startup();
 202 }
 203
 204 /*
 205 ================
 206 S_Init
 207 ================
 208 */
 209 void S_Init(void)
 210 {
 211         Con_DPrint("\nSound Initialization\n");
 212
 213         S_RawSamples_ClearQueue();
 214
 215         Cvar_RegisterVariable(&volume);
 216         Cvar_RegisterVariable(&bgmvolume);
 217         Cvar_RegisterVariable(&snd_staticvolume);
 218
 219         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
 220                 return;
 221
 222         snd_mempool = Mem_AllocPool("sound");
 223
 224         if (COM_CheckParm("-simsound"))
 225                 fakedma = true;
 226
 227         Cmd_AddCommand("play", S_Play);
 228         Cmd_AddCommand("play2", S_Play2);
 229         Cmd_AddCommand("playvol", S_PlayVol);
 230         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
 231         Cmd_AddCommand("soundlist", S_SoundList);
 232         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
 233         Cmd_AddCommand("snd_restart", S_Restart_f);
 234
 235         Cvar_RegisterVariable(&nosound);
 236         Cvar_RegisterVariable(&snd_precache);
 237         Cvar_RegisterVariable(&snd_initialized);
 238         Cvar_RegisterVariable(&snd_streaming);
 239         Cvar_RegisterVariable(&bgmbuffer);
 240         Cvar_RegisterVariable(&ambient_level);
 241         Cvar_RegisterVariable(&ambient_fade);
 242         Cvar_RegisterVariable(&snd_noextraupdate);
 243         Cvar_RegisterVariable(&snd_show);
 244         Cvar_RegisterVariable(&_snd_mixahead);
 245         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
 246
 247         Cvar_SetValueQuick(&snd_initialized, true);
 248
 249         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
 250         num_sfx = 0;
 251
 252         SND_InitScaletable ();
 253
 254         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false, true);
 255         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false, true);
 256
 257         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 258         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 259
 260         OGG_OpenLibrary ();
 261 }
 262
 263
 264 // =======================================================================
 265 // Load a sound
 266 // =======================================================================
 267
 268 /*
 269 =========
 270 S_GetCached
 271
 272 =========
 273 */
 274 sfx_t *S_GetCached (const char *name, qboolean stdpath)
 275 {
 276         char namebuffer [MAX_QPATH];
 277         size_t len;
 278         int i;
 279
 280         if (!snd_initialized.integer)
 281                 return NULL;
 282
 283         if (!name)
 284                 Host_Error("S_GetCached: NULL");
 285
 286         // Add the default sound directory to the path
 287         len = snprintf (namebuffer, sizeof (namebuffer), stdpath ? "sound/%s" : "%s", name);
 288         if (len >= sizeof (namebuffer))
 289                 Host_Error ("S_GetCached: sound name too long (%s)", name);
 290
 291         for(i = 0;i < num_sfx;i++)
 292                 if(!strcmp(known_sfx[i].name, namebuffer))
 293                         return &known_sfx[i];
 294
 295         return NULL;
 296 }
 297
 298 /*
 299 ==================
 300 S_FindName
 301
 302 ==================
 303 */
 304 sfx_t *S_FindName (const char *name, qboolean stdpath)
 305 {
 306         sfx_t *sfx;
 307
 308         sfx = S_GetCached (name, stdpath);
 309
 310         // If we haven't allocated a sfx_t struct for it yet
 311         if (sfx == NULL)
 312         {
 313                 if (num_sfx == MAX_SFX)
 314                         Sys_Error ("S_FindName: out of sfx_t");
 315
 316                 sfx = &known_sfx[num_sfx++];
 317                 memset (sfx, 0, sizeof(*sfx));
 318                 snprintf (sfx->name, sizeof (sfx->name), stdpath ? "sound/%s" : "%s", name);
 319         }
 320         return sfx;
 321 }
 322
 323
 324 /*
 325 ==================
 326 S_TouchSound
 327
 328 ==================
 329 */
 330 void S_TouchSound (const char *name, qboolean stdpath)
 331 {
 332         sfx_t *sfx;
 333
 334         sfx = S_FindName (name, stdpath);
 335
 336         // Set the "used" flag for this sound
 337         if (sfx != NULL)
 338                 sfx->flags |= SFXFLAG_USED;
 339 }
 340
 341
 342 /*
 343 ==================
 344 S_ClearUsed
 345
 346 Reset the "used" flag of all precached sounds
 347 ==================
 348 */
 349 void S_ClearUsed (void)
 350 {
 351         int i;
 352
 353         for (i = 0; i < num_sfx; i++)
 354                 known_sfx[i].flags &= ~SFXFLAG_USED;
 355 }
 356
 357
 358 /*
 359 ==================
 360 S_PurgeUnused
 361
 362 Free all precached sounds without the "used" flag
 363 ==================
 364 */
 365 void S_PurgeUnused (void)
 366 {
 367         int i;
 368         sfx_t *sfx;
 369
 370         for (i = 0; i < num_sfx; i++)
 371         {
 372                 sfx = &known_sfx[i];
 373                 if (! (sfx->flags & SFXFLAG_USED))
 374                         S_UnloadSound (sfx);
 375         }
 376 }
 377
 378
 379 /*
 380 ==================
 381 S_PrecacheSound
 382
 383 ==================
 384 */
 385 sfx_t *S_PrecacheSound (const char *name, qboolean complain, qboolean stdpath)
 386 {
 387         sfx_t *sfx;
 388
 389         if (!snd_initialized.integer)
 390                 return NULL;
 391
 392         sfx = S_FindName (name, stdpath);
 393
 394         if (!nosound.integer && snd_precache.integer)
 395                 S_LoadSound(sfx, complain);
 396
 397         return sfx;
 398 }
 399
 400
 401 //=============================================================================
 402
 403 /*
 404 =================
 405 SND_PickChannel
 406
 407 Picks a channel based on priorities, empty slots, number of channels
 408 =================
 409 */
 410 channel_t *SND_PickChannel(int entnum, int entchannel)
 411 {
 412         int ch_idx;
 413         int first_to_die;
 414         int life_left;
 415         channel_t* ch;
 416
 417 // Check for replacement sound, or find the best one to replace
 418         first_to_die = -1;
 419         life_left = 0x7fffffff;
 420         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
 421         {
 422                 ch = &channels[ch_idx];
 423                 if (entchannel != 0             // channel 0 never overrides
 424                 && ch->entnum == entnum
 425                 && (ch->entchannel == entchannel || entchannel == -1) )
 426                 {       // always override sound from same entity
 427                         first_to_die = ch_idx;
 428                         break;
 429                 }
 430
 431                 // don't let monster sounds override player sounds
 432                 if (ch->entnum == cl.viewentity && entnum != cl.viewentity && ch->sfx)
 433                         continue;
 434
 435                 // don't override looped sounds
 436                 if ((ch->flags & CHANNELFLAG_FORCELOOP) != 0 ||
 437                         (ch->sfx != NULL && ch->sfx->loopstart >= 0))
 438                         continue;
 439
 440                 if (ch->end - paintedtime < life_left)
 441                 {
 442                         life_left = ch->end - paintedtime;
 443                         first_to_die = ch_idx;
 444                 }
 445         }
 446
 447         if (first_to_die == -1)
 448                 return NULL;
 449
 450         if (channels[first_to_die].sfx)
 451                 channels[first_to_die].sfx = NULL;
 452
 453         return &channels[first_to_die];
 454 }
 455
 456 /*
 457 =================
 458 SND_Spatialize
 459
 460 Spatializes a channel
 461 =================
 462 */
 463 void SND_Spatialize(channel_t *ch, int isstatic)
 464 {
 465         vec_t dist, scale, pan;
 466         vec3_t source_vec;
 467
 468         // anything coming from the view entity will always be full volume
 469         // LordHavoc: make sounds with ATTN_NONE have no spatialization
 470         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
 471         {
 472                 ch->leftvol = ch->master_vol;
 473                 ch->rightvol = ch->master_vol;
 474         }
 475         else
 476         {
 477                 // update sound origin if we know about the entity
 478                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
 479                 {
 480                         //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]);
 481                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
 482                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
 483                                 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);
 484                 }
 485
 486                 // calculate stereo seperation and distance attenuation
 487                 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
 488                 dist = VectorNormalizeLength(source_vec);
 489                 // distance
 490                 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
 491                 // panning
 492                 pan = scale * DotProduct(listener_viewleft, source_vec);
 493                 // calculate the volumes
 494                 ch->leftvol = (int) (scale + pan);
 495                 ch->rightvol = (int) (scale - pan);
 496         }
 497
 498         // LordHavoc: allow adjusting volume of static sounds
 499         if (isstatic)
 500         {
 501                 ch->leftvol *= snd_staticvolume.value;
 502                 ch->rightvol *= snd_staticvolume.value;
 503         }
 504
 505         // clamp volumes
 506         ch->leftvol = bound(0, ch->leftvol, 255);
 507         ch->rightvol = bound(0, ch->rightvol, 255);
 508 }
 509
 510
 511 // =======================================================================
 512 // Start a sound effect
 513 // =======================================================================
 514
 515 int S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
 516 {
 517         channel_t *target_chan, *check;
 518         int             vol;
 519         int             ch_idx;
 520         size_t  skip;
 521
 522         if (!sound_started || !sfx || !sfx->fetcher || nosound.integer)
 523                 return -1;
 524
 525         vol = fvol*255;
 526
 527 // pick a channel to play on
 528         target_chan = SND_PickChannel(entnum, entchannel);
 529         if (!target_chan)
 530                 return -1;
 531
 532 // spatialize
 533         memset (target_chan, 0, sizeof(*target_chan));
 534         VectorCopy(origin, target_chan->origin);
 535         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
 536         target_chan->master_vol = vol;
 537         target_chan->entnum = entnum;
 538         target_chan->entchannel = entchannel;
 539         SND_Spatialize(target_chan, false);
 540
 541         // LordHavoc: spawn the sound anyway because the player might teleport to it
 542         //if (!target_chan->leftvol && !target_chan->rightvol)
 543         //      return;         // not audible at all
 544
 545         // new channel
 546         if (!S_LoadSound (sfx, true))
 547         {
 548                 target_chan->sfx = NULL;
 549                 return -1;              // couldn't load the sound's data
 550         }
 551
 552         target_chan->sfx = sfx;
 553         target_chan->flags = CHANNELFLAG_NONE;
 554         target_chan->pos = 0.0;
 555         target_chan->end = paintedtime + sfx->total_length;
 556         target_chan->lastptime = paintedtime;
 557
 558 // if an identical sound has also been started this frame, offset the pos
 559 // a bit to keep it from just making the first one louder
 560         check = &channels[NUM_AMBIENTS];
 561         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
 562         {
 563                 if (check == target_chan)
 564                         continue;
 565                 if (check->sfx == sfx && !check->pos)
 566                 {
 567                         // LordHavoc: fixed skip calculations
 568                         skip = 0.1 * sfx->format.speed;
 569                         if (skip > sfx->total_length)
 570                                 skip = sfx->total_length;
 571                         if (skip > 0)
 572                                 skip = rand() % skip;
 573                         target_chan->pos += skip;
 574                         target_chan->end -= skip;
 575                         break;
 576                 }
 577         }
 578
 579         return (target_chan - channels);
 580 }
 581
 582 void S_StopChannel (unsigned int channel_ind)
 583 {
 584         channel_t *ch;
 585
 586         if (channel_ind >= total_channels)
 587                 return;
 588
 589         ch = &channels[channel_ind];
 590         if (ch->sfx != NULL)
 591         {
 592                 if (ch->sfx->fetcher != NULL)
 593                 {
 594                         snd_fetcher_end_t fetcher_end = ch->sfx->fetcher->end;
 595                         if (fetcher_end != NULL)
 596                                 fetcher_end (ch);
 597                 }
 598                 ch->sfx = NULL;
 599         }
 600         ch->end = 0;
 601 }
 602
 603 void S_PauseChannel (unsigned int channel_ind, qboolean toggle)
 604 {
 605         if (toggle)
 606                 channels[channel_ind].flags |= CHANNELFLAG_PAUSED;
 607         else
 608                 channels[channel_ind].flags &= ~CHANNELFLAG_PAUSED;
 609 }
 610
 611 void S_LoopChannel (unsigned int channel_ind, qboolean toggle)
 612 {
 613         if (toggle)
 614                 channels[channel_ind].flags |= CHANNELFLAG_FORCELOOP;
 615         else
 616                 channels[channel_ind].flags &= ~CHANNELFLAG_FORCELOOP;
 617 }
 618
 619 void S_StopSound(int entnum, int entchannel)
 620 {
 621         unsigned int i;
 622
 623         for (i = 0; i < MAX_DYNAMIC_CHANNELS; i++)
 624                 if (channels[i].entnum == entnum && channels[i].entchannel == entchannel)
 625                 {
 626                         S_StopChannel (i);
 627                         return;
 628                 }
 629 }
 630
 631 void S_StopAllSounds(qboolean clear)
 632 {
 633         unsigned int i;
 634
 635         for (i = 0; i < total_channels; i++)
 636                 S_StopChannel (i);
 637
 638         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
 639         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
 640
 641         if (clear)
 642                 S_ClearBuffer();
 643 }
 644
 645 void S_StopAllSoundsC(void)
 646 {
 647         S_StopAllSounds(true);
 648 }
 649
 650 void S_PauseGameSounds (void)
 651 {
 652         unsigned int i;
 653
 654         for (i = 0; i < total_channels; i++)
 655         {
 656                 channel_t *ch;
 657
 658                 ch = &channels[i];
 659                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
 660                         ch->flags |= CHANNELFLAG_PAUSED;
 661         }
 662 }
 663
 664 void S_ResumeGameSounds (void)
 665 {
 666         unsigned int i;
 667
 668         for (i = 0; i < total_channels; i++)
 669         {
 670                 channel_t *ch;
 671
 672                 ch = &channels[i];
 673                 if (ch->sfx != NULL && ! (ch->flags & CHANNELFLAG_LOCALSOUND))
 674                         ch->flags &= ~CHANNELFLAG_PAUSED;
 675         }
 676 }
 677
 678 void S_SetChannelVolume (unsigned int ch_ind, float fvol)
 679 {
 680         channels[ch_ind].master_vol = fvol * 255;
 681 }
 682
 683
 684 void S_ClearBuffer(void)
 685 {
 686         int             clear;
 687
 688         if (!sound_started || !shm)
 689                 return;
 690
 691         if (shm->format.width == 1)
 692                 clear = 0x80;
 693         else
 694                 clear = 0;
 695
 696 #ifdef _WIN32
 697         if (pDSBuf)
 698         {
 699                 DWORD   dwSize;
 700                 DWORD   *pData;
 701                 int             reps;
 702                 HRESULT hresult;
 703
 704                 reps = 0;
 705
 706                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
 707                 {
 708                         if (hresult != DSERR_BUFFERLOST)
 709                         {
 710                                 Con_Print("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
 711                                 S_Shutdown ();
 712                                 return;
 713                         }
 714
 715                         if (++reps > 10000)
 716                         {
 717                                 Con_Print("S_ClearBuffer: DS: couldn't restore buffer\n");
 718                                 S_Shutdown ();
 719                                 return;
 720                         }
 721                 }
 722
 723                 memset(pData, clear, shm->samples * shm->format.width);
 724
 725                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
 726
 727         }
 728         else
 729 #endif
 730         if (shm->buffer)
 731         {
 732                 int             setsize = shm->samples * shm->format.width;
 733                 char    *buf = shm->buffer;
 734
 735                 while (setsize--)
 736                         *buf++ = clear;
 737
 738 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
 739 // reads the memory area before writing to it causing a seg fault
 740 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
 741 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
 742         }
 743 }
 744
 745
 746 /*
 747 =================
 748 S_StaticSound
 749 =================
 750 */
 751 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
 752 {
 753         channel_t       *ss;
 754
 755         if (!sfx)
 756                 return;
 757
 758         if (total_channels == MAX_CHANNELS)
 759         {
 760                 Con_Print("total_channels == MAX_CHANNELS\n");
 761                 return;
 762         }
 763
 764         if (!S_LoadSound (sfx, true))
 765                 return;
 766
 767         if (sfx->loopstart == -1)
 768                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
 769
 770         ss = &channels[total_channels++];
 771         memset(ss, 0, sizeof(*ss));
 772         ss->flags = CHANNELFLAG_FORCELOOP;
 773         ss->sfx = sfx;
 774         VectorCopy (origin, ss->origin);
 775         ss->master_vol = vol;
 776         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
 777         ss->end = paintedtime + sfx->total_length;
 778         ss->lastptime = paintedtime;
 779
 780         SND_Spatialize (ss, true);
 781 }
 782
 783
 784 //=============================================================================
 785
 786 /*
 787 ===================
 788 S_UpdateAmbientSounds
 789 ===================
 790 */
 791 void S_UpdateAmbientSounds (void)
 792 {
 793         float           vol;
 794         int                     ambient_channel;
 795         channel_t       *chan;
 796         qbyte           ambientlevels[NUM_AMBIENTS];
 797
 798         // LordHavoc: kill ambient sounds until proven otherwise
 799         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
 800                 channels[ambient_channel].sfx = NULL;
 801
 802         if (ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
 803                 return;
 804
 805         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
 806
 807 // calc ambient sound levels
 808         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
 809         {
 810                 if (ambient_sfx[ambient_channel] &&
 811                         (ambient_sfx[ambient_channel]->flags & SFXFLAG_SILENTLYMISSING))
 812                         continue;
 813                 chan = &channels[ambient_channel];
 814                 chan->flags |= CHANNELFLAG_FORCELOOP;
 815                 chan->sfx = ambient_sfx[ambient_channel];
 816
 817                 vol = ambient_level.value * ambientlevels[ambient_channel];
 818                 if (vol < 8)
 819                         vol = 0;
 820
 821         // don't adjust volume too fast
 822                 if (chan->master_vol < vol)
 823                 {
 824                         chan->master_vol += host_realframetime * ambient_fade.value;
 825                         if (chan->master_vol > vol)
 826                                 chan->master_vol = vol;
 827                 }
 828                 else if (chan->master_vol > vol)
 829                 {
 830                         chan->master_vol -= host_realframetime * ambient_fade.value;
 831                         if (chan->master_vol < vol)
 832                                 chan->master_vol = vol;
 833                 }
 834
 835                 chan->leftvol = chan->rightvol = chan->master_vol;
 836         }
 837 }
 838
 839
 840 /*
 841 ============
 842 S_Update
 843
 844 Called once each time through the main loop
 845 ============
 846 */
 847 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
 848 {
 849         unsigned int i, j, total;
 850         channel_t *ch, *combine;
 851
 852         if (!snd_initialized.integer || (snd_blocked > 0))
 853                 return;
 854
 855         VectorCopy(origin, listener_vieworigin);
 856         VectorCopy(forward, listener_viewforward);
 857         VectorCopy(left, listener_viewleft);
 858         VectorCopy(up, listener_viewup);
 859
 860 // update general area ambient sound sources
 861         S_UpdateAmbientSounds ();
 862
 863         combine = NULL;
 864
 865 // update spatialization for static and dynamic sounds
 866         ch = channels+NUM_AMBIENTS;
 867         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
 868         {
 869                 if (!ch->sfx)
 870                         continue;
 871                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
 872                 if (!ch->leftvol && !ch->rightvol)
 873                         continue;
 874
 875         // try to combine static sounds with a previous channel of the same
 876         // sound effect so we don't mix five torches every frame
 877
 878                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
 879                 {
 880                 // see if it can just use the last one
 881                         if (combine && combine->sfx == ch->sfx)
 882                         {
 883                                 combine->leftvol += ch->leftvol;
 884                                 combine->rightvol += ch->rightvol;
 885                                 ch->leftvol = ch->rightvol = 0;
 886                                 continue;
 887                         }
 888                 // search for one
 889                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
 890                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
 891                                 if (combine->sfx == ch->sfx)
 892                                         break;
 893
 894                         if (j == total_channels)
 895                                 combine = NULL;
 896                         else
 897                         {
 898                                 if (combine != ch)
 899                                 {
 900                                         combine->leftvol += ch->leftvol;
 901                                         combine->rightvol += ch->rightvol;
 902                                         ch->leftvol = ch->rightvol = 0;
 903                                 }
 904                                 continue;
 905                         }
 906                 }
 907         }
 908
 909 //
 910 // debugging output
 911 //
 912         if (snd_show.integer)
 913         {
 914                 total = 0;
 915                 ch = channels;
 916                 for (i=0 ; i<total_channels; i++, ch++)
 917                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
 918                                 total++;
 919
 920                 Con_Printf("----(%u)----\n", total);
 921         }
 922
 923 // mix some sound
 924         S_Update_();
 925 }
 926
 927 void GetSoundtime(void)
 928 {
 929         int             samplepos;
 930         static  int             buffers;
 931         static  int             oldsamplepos;
 932         int             fullsamples;
 933
 934         fullsamples = shm->samples / shm->format.channels;
 935
 936 // it is possible to miscount buffers if it has wrapped twice between
 937 // calls to S_Update.  Oh well.
 938         samplepos = SNDDMA_GetDMAPos();
 939
 940         if (samplepos < oldsamplepos)
 941         {
 942                 buffers++;                                      // buffer wrapped
 943
 944                 if (paintedtime > 0x40000000)
 945                 {       // time to chop things off to avoid 32 bit limits
 946                         buffers = 0;
 947                         paintedtime = fullsamples;
 948                         S_StopAllSounds (true);
 949                 }
 950         }
 951         oldsamplepos = samplepos;
 952
 953         soundtime = buffers * fullsamples + samplepos / shm->format.channels;
 954 }
 955
 956 void IN_Accumulate (void);
 957
 958 void S_ExtraUpdate (void)
 959 {
 960
 961 #ifdef _WIN32
 962         IN_Accumulate ();
 963 #endif
 964
 965         if (snd_noextraupdate.integer)
 966                 return;         // don't pollute timings
 967         S_Update_();
 968 }
 969
 970 void S_Update_(void)
 971 {
 972         unsigned        endtime;
 973         int                             samps;
 974
 975         if (!sound_started || (snd_blocked > 0))
 976                 return;
 977
 978 // Updates DMA time
 979         GetSoundtime();
 980
 981 // check to make sure that we haven't overshot
 982         if (paintedtime < soundtime)
 983                 paintedtime = soundtime;
 984
 985 // mix ahead of current position
 986         endtime = soundtime + _snd_mixahead.value * shm->format.speed;
 987         samps = shm->samples >> (shm->format.channels - 1);
 988         if (endtime > (unsigned int)(soundtime + samps))
 989                 endtime = soundtime + samps;
 990
 991 #ifdef _WIN32
 992 // if the buffer was lost or stopped, restore it and/or restart it
 993         {
 994                 DWORD   dwStatus;
 995
 996                 if (pDSBuf)
 997                 {
 998                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
 999                                 Con_Print("Couldn't get sound buffer status\n");
1000
1001                         if (dwStatus & DSBSTATUS_BUFFERLOST)
1002                                 pDSBuf->lpVtbl->Restore (pDSBuf);
1003
1004                         if (!(dwStatus & DSBSTATUS_PLAYING))
1005                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
1006                 }
1007         }
1008 #endif
1009
1010         S_PaintChannels (endtime);
1011
1012         SNDDMA_Submit ();
1013 }
1014
1015 /*
1016 ===============================================================================
1017
1018 console functions
1019
1020 ===============================================================================
1021 */
1022
1023 static void S_Play_Common(float fvol, float attenuation)
1024 {
1025         int     i, ch_ind;
1026         char name[256];
1027         sfx_t   *sfx;
1028
1029         i = 1;
1030         while (i<Cmd_Argc())
1031         {
1032                 if (!strrchr(Cmd_Argv(i), '.'))
1033                         snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
1034                 else
1035                         strlcpy(name, Cmd_Argv(i), sizeof(name));
1036                 sfx = S_PrecacheSound(name, true, true);
1037
1038                 // If we need to get the volume from the command line
1039                 if (fvol == -1.0f)
1040                 {
1041                         fvol = atof(Cmd_Argv(i+1));
1042                         i += 2;
1043                 }
1044                 else
1045                         i++;
1046
1047                 ch_ind = S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
1048                 if (ch_ind >= 0)
1049                         channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1050         }
1051 }
1052
1053 void S_Play(void)
1054 {
1055         S_Play_Common (1.0f, 1.0f);
1056 }
1057
1058 void S_Play2(void)
1059 {
1060         S_Play_Common (1.0f, 0.0f);
1061 }
1062
1063 void S_PlayVol(void)
1064 {
1065         S_Play_Common (-1.0f, 0.0f);
1066 }
1067
1068 void S_SoundList(void)
1069 {
1070         int             i;
1071         sfx_t   *sfx;
1072         int             size, total;
1073
1074         total = 0;
1075         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
1076         {
1077                 if (sfx->fetcher != NULL)
1078                 {
1079                         size = sfx->mempool->totalsize;
1080                         total += size;
1081                         Con_Printf ("%c%c(%2db, %6s) %8i : %s\n",
1082                                                 (sfx->loopstart >= 0) ? 'L' : ' ',
1083                                                 (sfx->flags & SFXFLAG_STREAMED) ? 'S' : ' ',
1084                                                 sfx->format.width * 8,
1085                                                 (sfx->format.channels == 2) ? "stereo" : "mono",
1086                                                 size,
1087                                                 sfx->name);
1088                 }
1089         }
1090         Con_Printf("Total resident: %i\n", total);
1091 }
1092
1093
1094 void S_LocalSound (const char *sound, qboolean stdpath)
1095 {
1096         sfx_t   *sfx;
1097         int             ch_ind;
1098
1099         if (!snd_initialized.integer || nosound.integer)
1100                 return;
1101
1102         sfx = S_PrecacheSound (sound, true, stdpath);
1103         if (!sfx)
1104         {
1105                 Con_Printf("S_LocalSound: can't precache %s\n", sound);
1106                 return;
1107         }
1108
1109         ch_ind = S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1110         if (ch_ind >= 0)
1111                 channels[ch_ind].flags |= CHANNELFLAG_LOCALSOUND;
1112 }
1113
1114
1115 #define RAWSAMPLESBUFFER 32768
1116 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1117 int s_rawsamplesbuffer_start;
1118 size_t s_rawsamplesbuffer_count;
1119
1120 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1121 {
1122         int b2, b3;
1123         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1124         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1125                 return;
1126         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1127         if (b2 + length > RAWSAMPLESBUFFER)
1128         {
1129                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1130                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1131                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1132         }
1133         else
1134                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1135         s_rawsamplesbuffer_count += length;
1136 }
1137
1138 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1139 {
1140         int b1, b2;
1141         size_t l;
1142         int i;
1143         short *in;
1144         int *out;
1145         int count;
1146         l = length;
1147         if (l > s_rawsamplesbuffer_count)
1148                 l = s_rawsamplesbuffer_count;
1149         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1150         if (b1 + l > RAWSAMPLESBUFFER)
1151         {
1152                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1153                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1154                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1155                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1156                         out[i] = in[i];
1157                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1158                         out[i] = in[i];
1159                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1160         }
1161         else
1162         {
1163                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1164                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1165                         out[i] = in[i];
1166                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1167         }
1168         if (l < (int)length)
1169         {
1170                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1171                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1172         }
1173         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1174         s_rawsamplesbuffer_count -= l;
1175 }
1176
1177 void S_RawSamples_ClearQueue(void)
1178 {
1179         s_rawsamplesbuffer_count = 0;
1180         s_rawsamplesbuffer_start = 0;
1181 }
1182
1183 int S_RawSamples_QueueWantsMore(void)
1184 {
1185         if (shm != NULL && s_rawsamplesbuffer_count < min(shm->format.speed >> 1, RAWSAMPLESBUFFER >> 1))
1186                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1187         else
1188                 return 0;
1189 }
1190
1191 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1192 {
1193         if (inputlength != outputlength)
1194         {
1195                 int i, position, stopposition, step;
1196                 short *in, *out;
1197                 step = (float) inputlength * 256.0f / (float) outputlength;
1198                 position = 0;
1199                 stopposition = (inputlength - 1) << 8;
1200                 out = output;
1201                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1202                 {
1203                         in = input + ((position >> 8) << 1);
1204                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1205                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1206                         out += 2;
1207                 }
1208                 stopposition = inputlength << 8;
1209                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1210                 {
1211                         in = input + ((position >> 8) << 1);
1212                         out[0] = in[0];
1213                         out[1] = in[2];
1214                         out += 2;
1215                 }
1216         }
1217         else
1218                 memcpy(output, input, inputlength * sizeof(short[2]));
1219 }
1220
1221 int S_RawSamples_SampleRate(void)
1222 {
1223         return shm != NULL ? shm->format.speed : 0;
1224 }
1225