no time to explain, more changes on the path to q3bsp support
[xonotic/darkplaces.git] / snd_dma.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // snd_dma.c -- main control for any streaming sound output device
21
22 #include "quakedef.h"
23
24 #ifdef _WIN32
25 #include "winquake.h"
26 #endif
27
28 void S_Play(void);
29 void S_PlayVol(void);
30 void S_Play2(void);
31 void S_SoundList(void);
32 void S_Update_();
33 void S_StopAllSounds(qboolean clear);
34 void S_StopAllSoundsC(void);
35
36 // =======================================================================
37 // Internal sound data & structures
38 // =======================================================================
39
40 channel_t channels[MAX_CHANNELS];
41 int total_channels;
42
43 int snd_blocked = 0;
44 static qboolean snd_ambient = 1;
45 qboolean snd_initialized = false;
46
47 // pointer should go away
48 volatile dma_t *shm = 0;
49 volatile dma_t sn;
50
51 vec3_t listener_origin;
52 vec3_t listener_forward;
53 vec3_t listener_right;
54 vec3_t listener_up;
55 vec_t sound_nominal_clip_dist=1000.0;
56 mempool_t *snd_mempool;
57
58 // sample PAIRS
59 int soundtime;
60 int paintedtime;
61
62
63 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
64 #define MAX_SFX 4096
65 sfx_t *known_sfx; // allocated [MAX_SFX]
66 int num_sfx;
67
68 sfx_t *ambient_sfx[NUM_AMBIENTS];
69
70 int sound_started = 0;
71
72 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
73 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
74 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
75
76 cvar_t nosound = {0, "nosound", "0"};
77 cvar_t snd_precache = {0, "snd_precache", "1"};
78 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
79 cvar_t ambient_level = {0, "ambient_level", "0.3"};
80 cvar_t ambient_fade = {0, "ambient_fade", "100"};
81 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
82 cvar_t snd_show = {0, "snd_show", "0"};
83 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
84 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
85
86
87 // ====================================================================
88 // User-setable variables
89 // ====================================================================
90
91
92 //
93 // Fake dma is a synchronous faking of the DMA progress used for
94 // isolating performance in the renderer.  The fakedma_updates is
95 // number of times S_Update() is called per second.
96 //
97
98 qboolean fakedma = false;
99 int fakedma_updates = 15;
100
101
102 void S_AmbientOff (void)
103 {
104         snd_ambient = false;
105 }
106
107
108 void S_AmbientOn (void)
109 {
110         snd_ambient = true;
111 }
112
113
114 void S_SoundInfo_f(void)
115 {
116         if (!sound_started || !shm)
117         {
118                 Con_Printf ("sound system not started\n");
119                 return;
120         }
121
122         Con_Printf("%5d stereo\n", shm->channels - 1);
123         Con_Printf("%5d samples\n", shm->samples);
124         Con_Printf("%5d samplepos\n", shm->samplepos);
125         Con_Printf("%5d samplebits\n", shm->samplebits);
126         Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
127         Con_Printf("%5d speed\n", shm->speed);
128         Con_Printf("0x%x dma buffer\n", shm->buffer);
129         Con_Printf("%5d total_channels\n", total_channels);
130 }
131
132
133 /*
134 ================
135 S_Startup
136 ================
137 */
138 void S_Startup (void)
139 {
140         int rc;
141
142         if (!snd_initialized)
143                 return;
144
145         if (!fakedma)
146         {
147                 rc = SNDDMA_Init();
148
149                 if (!rc)
150                 {
151                         Con_Printf("S_Startup: SNDDMA_Init failed.\n");
152                         sound_started = 0;
153                         return;
154                 }
155         }
156
157         sound_started = 1;
158 }
159
160 /*
161 ================
162 S_Init
163 ================
164 */
165 void S_Init (void)
166 {
167         Con_DPrintf("\nSound Initialization\n");
168
169         S_RawSamples_ClearQueue();
170
171         Cvar_RegisterVariable(&volume);
172         Cvar_RegisterVariable(&bgmvolume);
173         Cvar_RegisterVariable(&snd_staticvolume);
174
175         if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
176                 return;
177
178         snd_mempool = Mem_AllocPool("sound");
179
180         if (COM_CheckParm("-simsound"))
181                 fakedma = true;
182
183         Cmd_AddCommand("play", S_Play);
184         Cmd_AddCommand("play2", S_Play2);
185         Cmd_AddCommand("playvol", S_PlayVol);
186         Cmd_AddCommand("stopsound", S_StopAllSoundsC);
187         Cmd_AddCommand("soundlist", S_SoundList);
188         Cmd_AddCommand("soundinfo", S_SoundInfo_f);
189
190         Cvar_RegisterVariable(&nosound);
191         Cvar_RegisterVariable(&snd_precache);
192         Cvar_RegisterVariable(&bgmbuffer);
193         Cvar_RegisterVariable(&ambient_level);
194         Cvar_RegisterVariable(&ambient_fade);
195         Cvar_RegisterVariable(&snd_noextraupdate);
196         Cvar_RegisterVariable(&snd_show);
197         Cvar_RegisterVariable(&_snd_mixahead);
198         Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
199
200         snd_initialized = true;
201
202         known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
203         num_sfx = 0;
204
205         S_Startup ();
206
207         SND_InitScaletable ();
208
209 // create a piece of DMA memory
210
211         if (fakedma)
212         {
213                 shm = (void *) Mem_Alloc(snd_mempool, sizeof(*shm));
214                 shm->splitbuffer = 0;
215                 shm->samplebits = 16;
216                 shm->speed = 22050;
217                 shm->channels = 2;
218                 shm->samples = 32768;
219                 shm->samplepos = 0;
220                 shm->soundalive = true;
221                 shm->gamealive = true;
222                 shm->submission_chunk = 1;
223                 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
224         }
225
226         if (!sound_started)
227                 return;
228
229         Con_DPrintf ("Sound sampling rate: %i\n", shm->speed);
230
231         // provides a tick sound until washed clean
232
233         ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
234         ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
235
236         S_StopAllSounds (true);
237 }
238
239
240 // =======================================================================
241 // Shutdown sound engine
242 // =======================================================================
243
244 void S_Shutdown(void)
245 {
246         if (!sound_started)
247                 return;
248
249         if (shm)
250                 shm->gamealive = 0;
251
252         shm = 0;
253         sound_started = 0;
254
255         if (!fakedma)
256                 SNDDMA_Shutdown();
257 }
258
259
260 // =======================================================================
261 // Load a sound
262 // =======================================================================
263
264 /*
265 ==================
266 S_FindName
267
268 ==================
269 */
270 sfx_t *S_FindName (char *name)
271 {
272         int i;
273         sfx_t *sfx;
274
275         if (!name)
276                 Host_Error ("S_FindName: NULL\n");
277
278         if (strlen(name) >= MAX_QPATH)
279                 Host_Error ("Sound name too long: %s", name);
280
281 // see if already loaded
282         for (i = 0;i < num_sfx;i++)
283                 if (!strcmp(known_sfx[i].name, name))
284                         return &known_sfx[i];
285
286         if (num_sfx == MAX_SFX)
287                 Sys_Error ("S_FindName: out of sfx_t");
288
289         sfx = &known_sfx[i];
290         memset(sfx, 0, sizeof(*sfx));
291         strcpy (sfx->name, name);
292
293         num_sfx++;
294
295         return sfx;
296 }
297
298
299 /*
300 ==================
301 S_TouchSound
302
303 ==================
304 */
305 void S_TouchSound (char *name)
306 {
307         sfx_t   *sfx;
308
309         if (!sound_started)
310                 return;
311
312         sfx = S_FindName (name);
313 }
314
315 /*
316 ==================
317 S_PrecacheSound
318
319 ==================
320 */
321 sfx_t *S_PrecacheSound (char *name, int complain)
322 {
323         sfx_t *sfx;
324
325         if (!sound_started || nosound.integer)
326                 return NULL;
327
328         sfx = S_FindName (name);
329
330 // cache it in
331         if (snd_precache.integer)
332                 S_LoadSound (sfx, complain);
333
334         return sfx;
335 }
336
337
338 //=============================================================================
339
340 /*
341 =================
342 SND_PickChannel
343 =================
344 */
345 channel_t *SND_PickChannel(int entnum, int entchannel)
346 {
347         int ch_idx;
348         int first_to_die;
349         int life_left;
350
351 // Check for replacement sound, or find the best one to replace
352         first_to_die = -1;
353         life_left = 0x7fffffff;
354         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
355         {
356                 if (entchannel != 0             // channel 0 never overrides
357                 && channels[ch_idx].entnum == entnum
358                 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
359                 {       // always override sound from same entity
360                         first_to_die = ch_idx;
361                         break;
362                 }
363
364                 // don't let monster sounds override player sounds
365                 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
366                         continue;
367
368                 if (channels[ch_idx].end - paintedtime < life_left)
369                 {
370                         life_left = channels[ch_idx].end - paintedtime;
371                         first_to_die = ch_idx;
372                 }
373         }
374
375         if (first_to_die == -1)
376                 return NULL;
377
378         if (channels[first_to_die].sfx)
379                 channels[first_to_die].sfx = NULL;
380
381         return &channels[first_to_die];
382 }
383
384 /*
385 =================
386 SND_Spatialize
387 =================
388 */
389 void SND_Spatialize(channel_t *ch, int isstatic)
390 {
391         vec_t dot;
392         vec_t dist;
393         vec_t lscale, rscale, scale;
394         vec3_t source_vec;
395         sfx_t *snd;
396
397         // anything coming from the view entity will always be full volume
398         // LordHavoc: make sounds with ATTN_NONE have no spatialization
399         if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
400         {
401                 ch->leftvol = ch->master_vol;
402                 ch->rightvol = ch->master_vol;
403         }
404         else
405         {
406                 // update sound origin if we know about the entity
407                 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
408                 {
409                         //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]);
410                         VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
411                         if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->type == mod_brush)
412                                 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);
413                 }
414
415                 // calculate stereo seperation and distance attenuation
416                 snd = ch->sfx;
417                 VectorSubtract(ch->origin, listener_origin, source_vec);
418
419                 dist = VectorNormalizeLength(source_vec) * ch->dist_mult;
420
421                 dot = DotProduct(listener_right, source_vec);
422
423                 if (shm->channels == 1)
424                 {
425                         rscale = 1.0;
426                         lscale = 1.0;
427                 }
428                 else
429                 {
430                         rscale = 1.0 + dot;
431                         lscale = 1.0 - dot;
432                 }
433
434                 // add in distance effect
435                 scale = (1.0 - dist) * rscale;
436                 ch->rightvol = (int) (ch->master_vol * scale);
437                 if (ch->rightvol < 0)
438                         ch->rightvol = 0;
439
440                 scale = (1.0 - dist) * lscale;
441                 ch->leftvol = (int) (ch->master_vol * scale);
442                 if (ch->leftvol < 0)
443                         ch->leftvol = 0;
444         }
445
446         // LordHavoc: allow adjusting volume of static sounds
447         if (isstatic)
448         {
449                 ch->leftvol *= snd_staticvolume.value;
450                 ch->rightvol *= snd_staticvolume.value;
451         }
452 }
453
454
455 // =======================================================================
456 // Start a sound effect
457 // =======================================================================
458
459 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
460 {
461         channel_t *target_chan, *check;
462         sfxcache_t      *sc;
463         int             vol;
464         int             ch_idx;
465         int             skip;
466
467         if (!sound_started)
468                 return;
469
470         if (!sfx)
471                 return;
472
473         if (nosound.integer)
474                 return;
475
476         vol = fvol*255;
477
478 // pick a channel to play on
479         target_chan = SND_PickChannel(entnum, entchannel);
480         if (!target_chan)
481                 return;
482
483 // spatialize
484         memset (target_chan, 0, sizeof(*target_chan));
485         /*
486         if (cls.state == ca_connected && entnum > 0 && cl_entities[entnum].state_current.active)
487         {
488                 target_chan.follow = true;
489                 VectorSubtract(origin, cl_entities[entnum].state_current.origin, target_chan.followoriginoffset);
490         }
491         */
492         VectorCopy(origin, target_chan->origin);
493         target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
494         target_chan->master_vol = vol;
495         target_chan->entnum = entnum;
496         target_chan->entchannel = entchannel;
497         SND_Spatialize(target_chan, false);
498
499         if (!target_chan->leftvol && !target_chan->rightvol)
500                 return;         // not audible at all
501
502 // new channel
503         sc = S_LoadSound (sfx, true);
504         if (!sc)
505         {
506                 target_chan->sfx = NULL;
507                 return;         // couldn't load the sound's data
508         }
509
510         target_chan->sfx = sfx;
511         target_chan->pos = 0.0;
512         target_chan->end = paintedtime + sc->length;
513
514 // if an identical sound has also been started this frame, offset the pos
515 // a bit to keep it from just making the first one louder
516         check = &channels[NUM_AMBIENTS];
517         for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
518         {
519                 if (check == target_chan)
520                         continue;
521                 if (check->sfx == sfx && !check->pos)
522                 {
523                         // LordHavoc: fixed skip calculations
524                         skip = 0.1 * shm->speed;
525                         if (skip > sc->length)
526                                 skip = sc->length;
527                         if (skip > 0)
528                                 skip = rand() % skip;
529                         target_chan->pos += skip;
530                         target_chan->end -= skip;
531                         break;
532                 }
533
534         }
535 }
536
537 void S_StopSound(int entnum, int entchannel)
538 {
539         int i;
540
541         for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
542         {
543                 if (channels[i].entnum == entnum
544                         && channels[i].entchannel == entchannel)
545                 {
546                         channels[i].end = 0;
547                         channels[i].sfx = NULL;
548                         return;
549                 }
550         }
551 }
552
553 void S_StopAllSounds(qboolean clear)
554 {
555         if (!sound_started)
556                 return;
557
558         total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;   // no statics
559         memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
560
561         if (clear)
562                 S_ClearBuffer ();
563 }
564
565 void S_StopAllSoundsC (void)
566 {
567         S_StopAllSounds (true);
568 }
569
570 void S_ClearBuffer (void)
571 {
572         int             clear;
573
574 #ifdef _WIN32
575         if (!sound_started || !shm || (!shm->buffer && !pDSBuf))
576 #else
577         if (!sound_started || !shm || !shm->buffer)
578 #endif
579                 return;
580
581         if (shm->samplebits == 8)
582                 clear = 0x80;
583         else
584                 clear = 0;
585
586 #ifdef _WIN32
587         if (pDSBuf)
588         {
589                 DWORD   dwSize;
590                 DWORD   *pData;
591                 int             reps;
592                 HRESULT hresult;
593
594                 reps = 0;
595
596                 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK)
597                 {
598                         if (hresult != DSERR_BUFFERLOST)
599                         {
600                                 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
601                                 S_Shutdown ();
602                                 return;
603                         }
604
605                         if (++reps > 10000)
606                         {
607                                 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
608                                 S_Shutdown ();
609                                 return;
610                         }
611                 }
612
613                 memset(pData, clear, shm->samples * shm->samplebits/8);
614
615                 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
616
617         }
618         else
619 #endif
620         {
621                 int             setsize = shm->samples * shm->samplebits / 8;
622                 char    *buf = shm->buffer;
623
624                 while (setsize--)
625                         *buf++ = 0;
626
627 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
628 // reads the memory area before writing to it causing a seg fault
629 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
630 //              memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
631         }
632 }
633
634
635 /*
636 =================
637 S_StaticSound
638 =================
639 */
640 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
641 {
642         channel_t       *ss;
643         sfxcache_t              *sc;
644
645         if (!sfx)
646                 return;
647
648         if (total_channels == MAX_CHANNELS)
649         {
650                 Con_Printf ("total_channels == MAX_CHANNELS\n");
651                 return;
652         }
653
654         sc = S_LoadSound (sfx, true);
655         if (!sc)
656                 return;
657
658         if (sc->loopstart == -1)
659                 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
660
661         ss = &channels[total_channels++];
662         memset(ss, 0, sizeof(*ss));
663         ss->forceloop = true;
664         ss->sfx = sfx;
665         VectorCopy (origin, ss->origin);
666         ss->master_vol = vol;
667         ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
668         ss->end = paintedtime + sc->length;
669
670         SND_Spatialize (ss, true);
671 }
672
673
674 //=============================================================================
675
676 /*
677 ===================
678 S_UpdateAmbientSounds
679 ===================
680 */
681 void S_UpdateAmbientSounds (void)
682 {
683         float           vol;
684         int                     ambient_channel;
685         channel_t       *chan;
686         qbyte           ambientlevels[NUM_AMBIENTS];
687
688         // LordHavoc: kill ambient sounds until proven otherwise
689         for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
690                 channels[ambient_channel].sfx = NULL;
691
692         if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
693                 return;
694
695         cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_origin, ambientlevels, sizeof(ambientlevels));
696
697 // calc ambient sound levels
698         for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
699         {
700                 if (ambient_sfx[ambient_channel] && ambient_sfx[ambient_channel]->silentlymissing)
701                         continue;
702                 chan = &channels[ambient_channel];
703                 chan->forceloop = true;
704                 chan->sfx = ambient_sfx[ambient_channel];
705
706                 vol = ambient_level.value * ambientlevels[ambient_channel];
707                 if (vol < 8)
708                         vol = 0;
709
710         // don't adjust volume too fast
711                 if (chan->master_vol < vol)
712                 {
713                         chan->master_vol += host_realframetime * ambient_fade.value;
714                         if (chan->master_vol > vol)
715                                 chan->master_vol = vol;
716                 }
717                 else if (chan->master_vol > vol)
718                 {
719                         chan->master_vol -= host_realframetime * ambient_fade.value;
720                         if (chan->master_vol < vol)
721                                 chan->master_vol = vol;
722                 }
723
724                 chan->leftvol = chan->rightvol = chan->master_vol;
725         }
726 }
727
728
729 /*
730 ============
731 S_Update
732
733 Called once each time through the main loop
734 ============
735 */
736 void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
737 {
738         int                     i, j;
739         int                     total;
740         channel_t       *ch;
741         channel_t       *combine;
742
743         if (!sound_started || (snd_blocked > 0))
744                 return;
745
746         VectorCopy(origin, listener_origin);
747         VectorCopy(forward, listener_forward);
748         VectorCopy(right, listener_right);
749         VectorCopy(up, listener_up);
750
751 // update general area ambient sound sources
752         S_UpdateAmbientSounds ();
753
754         combine = NULL;
755
756 // update spatialization for static and dynamic sounds
757         ch = channels+NUM_AMBIENTS;
758         for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
759         {
760                 if (!ch->sfx)
761                         continue;
762                 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS);         // respatialize channel
763                 if (!ch->leftvol && !ch->rightvol)
764                         continue;
765
766         // try to combine static sounds with a previous channel of the same
767         // sound effect so we don't mix five torches every frame
768
769                 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
770                 {
771                 // see if it can just use the last one
772                         if (combine && combine->sfx == ch->sfx)
773                         {
774                                 combine->leftvol += ch->leftvol;
775                                 combine->rightvol += ch->rightvol;
776                                 ch->leftvol = ch->rightvol = 0;
777                                 continue;
778                         }
779                 // search for one
780                         combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS;
781                         for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++)
782                                 if (combine->sfx == ch->sfx)
783                                         break;
784
785                         if (j == total_channels)
786                                 combine = NULL;
787                         else
788                         {
789                                 if (combine != ch)
790                                 {
791                                         combine->leftvol += ch->leftvol;
792                                         combine->rightvol += ch->rightvol;
793                                         ch->leftvol = ch->rightvol = 0;
794                                 }
795                                 continue;
796                         }
797                 }
798         }
799
800 //
801 // debugging output
802 //
803         if (snd_show.integer)
804         {
805                 total = 0;
806                 ch = channels;
807                 for (i=0 ; i<total_channels; i++, ch++)
808                         if (ch->sfx && (ch->leftvol || ch->rightvol) )
809                                 total++;
810
811                 Con_Printf ("----(%i)----\n", total);
812         }
813
814 // mix some sound
815         S_Update_();
816 }
817
818 void GetSoundtime(void)
819 {
820         int             samplepos;
821         static  int             buffers;
822         static  int             oldsamplepos;
823         int             fullsamples;
824
825         fullsamples = shm->samples / shm->channels;
826
827 // it is possible to miscount buffers if it has wrapped twice between
828 // calls to S_Update.  Oh well.
829 #ifdef __sun__
830         soundtime = SNDDMA_GetSamples();
831 #else
832         samplepos = SNDDMA_GetDMAPos();
833
834
835         if (samplepos < oldsamplepos)
836         {
837                 buffers++;                                      // buffer wrapped
838
839                 if (paintedtime > 0x40000000)
840                 {       // time to chop things off to avoid 32 bit limits
841                         buffers = 0;
842                         paintedtime = fullsamples;
843                         S_StopAllSounds (true);
844                 }
845         }
846         oldsamplepos = samplepos;
847
848         soundtime = buffers*fullsamples + samplepos/shm->channels;
849 #endif
850 }
851
852 void IN_Accumulate (void);
853
854 void S_ExtraUpdate (void)
855 {
856
857 #ifdef _WIN32
858         IN_Accumulate ();
859 #endif
860
861         if (snd_noextraupdate.integer)
862                 return;         // don't pollute timings
863         S_Update_();
864 }
865
866 void S_Update_(void)
867 {
868         unsigned        endtime;
869         int                             samps;
870
871         if (!sound_started || (snd_blocked > 0))
872                 return;
873
874 // Updates DMA time
875         GetSoundtime();
876
877 // check to make sure that we haven't overshot
878         if (paintedtime < soundtime)
879                 paintedtime = soundtime;
880
881 // mix ahead of current position
882         endtime = soundtime + _snd_mixahead.value * shm->speed;
883         samps = shm->samples >> (shm->channels-1);
884         if (endtime > (unsigned int)(soundtime + samps))
885                 endtime = soundtime + samps;
886
887 #ifdef _WIN32
888 // if the buffer was lost or stopped, restore it and/or restart it
889         {
890                 DWORD   dwStatus;
891
892                 if (pDSBuf)
893                 {
894                         if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK)
895                                 Con_Printf ("Couldn't get sound buffer status\n");
896
897                         if (dwStatus & DSBSTATUS_BUFFERLOST)
898                                 pDSBuf->lpVtbl->Restore (pDSBuf);
899
900                         if (!(dwStatus & DSBSTATUS_PLAYING))
901                                 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
902                 }
903         }
904 #endif
905
906         S_PaintChannels (endtime);
907
908         SNDDMA_Submit ();
909 }
910
911 /*
912 ===============================================================================
913
914 console functions
915
916 ===============================================================================
917 */
918
919 void S_Play(void)
920 {
921         int     i;
922         char name[256];
923         sfx_t   *sfx;
924
925         i = 1;
926         while (i<Cmd_Argc())
927         {
928                 if (!strrchr(Cmd_Argv(i), '.'))
929                 {
930                         strcpy(name, Cmd_Argv(i));
931                         strcat(name, ".wav");
932                 }
933                 else
934                         strcpy(name, Cmd_Argv(i));
935                 sfx = S_PrecacheSound(name, true);
936                 S_StartSound(-1, 0, sfx, listener_origin, 1.0, 1.0);
937                 i++;
938         }
939 }
940
941 void S_Play2(void)
942 {
943         int     i;
944         char name[256];
945         sfx_t   *sfx;
946
947         i = 1;
948         while (i<Cmd_Argc())
949         {
950                 if (!strrchr(Cmd_Argv(i), '.'))
951                 {
952                         strcpy(name, Cmd_Argv(i));
953                         strcat(name, ".wav");
954                 }
955                 else
956                         strcpy(name, Cmd_Argv(i));
957                 sfx = S_PrecacheSound(name, true);
958                 S_StartSound(-1, 0, sfx, listener_origin, 1.0, 0.0);
959                 i++;
960         }
961 }
962
963 void S_PlayVol(void)
964 {
965         int i;
966         float vol;
967         char name[256];
968         sfx_t   *sfx;
969
970         i = 1;
971         while (i<Cmd_Argc())
972         {
973                 if (!strrchr(Cmd_Argv(i), '.'))
974                 {
975                         strcpy(name, Cmd_Argv(i));
976                         strcat(name, ".wav");
977                 }
978                 else
979                         strcpy(name, Cmd_Argv(i));
980                 sfx = S_PrecacheSound(name, true);
981                 vol = atof(Cmd_Argv(i+1));
982                 S_StartSound(-1, 0, sfx, listener_origin, vol, 1.0);
983                 i+=2;
984         }
985 }
986
987 void S_SoundList(void)
988 {
989         int             i;
990         sfx_t   *sfx;
991         sfxcache_t      *sc;
992         int             size, total;
993
994         total = 0;
995         for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
996         {
997                 sc = sfx->sfxcache;
998                 if (!sc)
999                         continue;
1000                 size = sc->length*sc->width*(sc->stereo+1);
1001                 total += size;
1002                 if (sc->loopstart >= 0)
1003                         Con_Printf ("L");
1004                 else
1005                         Con_Printf (" ");
1006                 Con_Printf("(%2db) %6i : %s\n",sc->width*8,  size, sfx->name);
1007         }
1008         Con_Printf ("Total resident: %i\n", total);
1009 }
1010
1011
1012 void S_LocalSound (char *sound)
1013 {
1014         sfx_t   *sfx;
1015
1016         if (nosound.integer)
1017                 return;
1018         if (!sound_started)
1019                 return;
1020
1021         sfx = S_PrecacheSound (sound, true);
1022         if (!sfx)
1023         {
1024                 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1025                 return;
1026         }
1027         S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1028 }
1029
1030
1031 void S_ClearPrecache (void)
1032 {
1033 }
1034
1035
1036 void S_BeginPrecaching (void)
1037 {
1038 }
1039
1040
1041 void S_EndPrecaching (void)
1042 {
1043 }
1044
1045
1046 #define RAWSAMPLESBUFFER 32768
1047 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1048 int s_rawsamplesbuffer_start;
1049 int s_rawsamplesbuffer_count;
1050
1051 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1052 {
1053         int b2, b3;
1054         //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1055         if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1056                 return;
1057         b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1058         if (b2 + length > RAWSAMPLESBUFFER)
1059         {
1060                 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1061                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1062                 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1063         }
1064         else
1065                 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1066         s_rawsamplesbuffer_count += length;
1067 }
1068
1069 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1070 {
1071         int b1, b2, l;
1072         int i;
1073         short *in;
1074         int *out;
1075         int count;
1076         l = length;
1077         if (l > s_rawsamplesbuffer_count)
1078                 l = s_rawsamplesbuffer_count;
1079         b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1080         if (b1 + l > RAWSAMPLESBUFFER)
1081         {
1082                 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1083                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1084                 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1085                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1086                         out[i] = in[i];
1087                 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1088                         out[i] = in[i];
1089                 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1090         }
1091         else
1092         {
1093                 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1094                 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1095                         out[i] = in[i];
1096                 //Con_Printf("S_RawSamples_Dequeue: normal      %i\n", l);
1097         }
1098         if (l < (int)length)
1099         {
1100                 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1101                 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1102         }
1103         s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1104         s_rawsamplesbuffer_count -= l;
1105 }
1106
1107 void S_RawSamples_ClearQueue(void)
1108 {
1109         s_rawsamplesbuffer_count = 0;
1110         s_rawsamplesbuffer_start = 0;
1111 }
1112
1113 int S_RawSamples_QueueWantsMore(void)
1114 {
1115         if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1116                 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1117         else
1118                 return 0;
1119 }
1120
1121 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1122 {
1123         if (inputlength != outputlength)
1124         {
1125                 int i, position, stopposition, step;
1126                 short *in, *out;
1127                 step = (float) inputlength * 256.0f / (float) outputlength;
1128                 position = 0;
1129                 stopposition = (inputlength - 1) << 8;
1130                 out = output;
1131                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1132                 {
1133                         in = input + ((position >> 8) << 1);
1134                         out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1135                         out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1136                         out += 2;
1137                 }
1138                 stopposition = inputlength << 8;
1139                 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1140                 {
1141                         in = input + ((position >> 8) << 1);
1142                         out[0] = in[0];
1143                         out[1] = in[2];
1144                         out += 2;
1145                 }
1146         }
1147         else
1148                 memcpy(output, input, inputlength * sizeof(short[2]));
1149 }
1150
1151 int S_RawSamples_SampleRate(void)
1152 {
1153         return shm != NULL ? shm->speed : 0;
1154 }