2 Copyright (C) 1996-1997 Id Software, Inc.
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.
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.
13 See the GNU General Public License for more details.
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.
20 // snd_dma.c -- main control for any streaming sound output device
27 extern DWORD gSndBufSize;
28 extern LPDIRECTSOUND pDS;
29 extern LPDIRECTSOUNDBUFFER pDSBuf;
38 void S_SoundList(void);
40 void S_StopAllSounds(qboolean clear);
41 void S_StopAllSoundsC(void);
43 // =======================================================================
44 // Internal sound data & structures
45 // =======================================================================
47 channel_t channels[MAX_CHANNELS];
51 static qboolean snd_ambient = 1;
52 cvar_t snd_initialized = { CVAR_READONLY, "snd_initialized", "0"};
54 // pointer should go away
55 volatile dma_t *shm = 0;
58 vec3_t listener_vieworigin;
59 vec3_t listener_viewforward;
60 vec3_t listener_viewleft;
61 vec3_t listener_viewup;
62 vec_t sound_nominal_clip_dist=1000.0;
63 mempool_t *snd_mempool;
70 //LordHavoc: increased the client sound limit from 512 to 4096 for the Nehahra movie
72 sfx_t *known_sfx; // allocated [MAX_SFX]
75 sfx_t *ambient_sfx[NUM_AMBIENTS];
77 int sound_started = 0;
79 cvar_t bgmvolume = {CVAR_SAVE, "bgmvolume", "1"};
80 cvar_t volume = {CVAR_SAVE, "volume", "0.7"};
81 cvar_t snd_staticvolume = {CVAR_SAVE, "snd_staticvolume", "1"};
83 cvar_t nosound = {0, "nosound", "0"};
84 cvar_t snd_precache = {0, "snd_precache", "1"};
85 cvar_t bgmbuffer = {0, "bgmbuffer", "4096"};
86 cvar_t ambient_level = {0, "ambient_level", "0.3"};
87 cvar_t ambient_fade = {0, "ambient_fade", "100"};
88 cvar_t snd_noextraupdate = {0, "snd_noextraupdate", "0"};
89 cvar_t snd_show = {0, "snd_show", "0"};
90 cvar_t _snd_mixahead = {CVAR_SAVE, "_snd_mixahead", "0.1"};
91 cvar_t snd_swapstereo = {CVAR_SAVE, "snd_swapstereo", "0"};
94 // ====================================================================
95 // User-setable variables
96 // ====================================================================
100 // Fake dma is a synchronous faking of the DMA progress used for
101 // isolating performance in the renderer. The fakedma_updates is
102 // number of times S_Update() is called per second.
105 qboolean fakedma = false;
106 int fakedma_updates = 15;
109 void S_AmbientOff (void)
115 void S_AmbientOn (void)
121 void S_SoundInfo_f(void)
123 if (!sound_started || !shm)
125 Con_Printf ("sound system not started\n");
129 Con_Printf("%5d stereo\n", shm->channels - 1);
130 Con_Printf("%5d samples\n", shm->samples);
131 Con_Printf("%5d samplepos\n", shm->samplepos);
132 Con_Printf("%5d samplebits\n", shm->samplebits);
133 Con_Printf("%5d speed\n", shm->speed);
134 Con_Printf("0x%x dma buffer\n", shm->buffer);
135 Con_Printf("%5d total_channels\n", total_channels);
138 void S_UnloadSounds(void)
141 for (i = 0;i < num_sfx;i++)
142 S_UnloadSound(known_sfx + i);
145 void S_LoadSounds(void)
148 for (i = 0;i < num_sfx;i++)
149 S_LoadSound(known_sfx + i, false);
154 if (!snd_initialized.integer)
158 memset((void *)shm, 0, sizeof(*shm));
160 // create a piece of DMA memory
164 shm->samplebits = 16;
167 shm->samples = 32768;
169 shm->buffer = Mem_Alloc(snd_mempool, shm->channels * shm->samples * (shm->samplebits / 8));
175 Con_Printf("S_Startup: SNDDMA_Init failed.\n");
184 Con_DPrintf("Sound sampling rate: %i\n", shm->speed);
188 S_StopAllSounds(true);
191 void S_Shutdown(void)
199 Mem_Free(shm->buffer);
207 void S_Restart_f(void)
220 Con_DPrintf("\nSound Initialization\n");
222 S_RawSamples_ClearQueue();
224 Cvar_RegisterVariable(&volume);
225 Cvar_RegisterVariable(&bgmvolume);
226 Cvar_RegisterVariable(&snd_staticvolume);
228 if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
231 snd_mempool = Mem_AllocPool("sound");
233 if (COM_CheckParm("-simsound"))
236 Cmd_AddCommand("play", S_Play);
237 Cmd_AddCommand("play2", S_Play2);
238 Cmd_AddCommand("playvol", S_PlayVol);
239 Cmd_AddCommand("stopsound", S_StopAllSoundsC);
240 Cmd_AddCommand("soundlist", S_SoundList);
241 Cmd_AddCommand("soundinfo", S_SoundInfo_f);
242 Cmd_AddCommand("snd_restart", S_Restart_f);
244 Cvar_RegisterVariable(&nosound);
245 Cvar_RegisterVariable(&snd_precache);
246 Cvar_RegisterVariable(&snd_initialized);
247 Cvar_RegisterVariable(&bgmbuffer);
248 Cvar_RegisterVariable(&ambient_level);
249 Cvar_RegisterVariable(&ambient_fade);
250 Cvar_RegisterVariable(&snd_noextraupdate);
251 Cvar_RegisterVariable(&snd_show);
252 Cvar_RegisterVariable(&_snd_mixahead);
253 Cvar_RegisterVariable(&snd_swapstereo); // LordHavoc: for people with backwards sound wiring
255 Cvar_SetValueQuick(&snd_initialized, true);
257 known_sfx = Mem_Alloc(snd_mempool, MAX_SFX*sizeof(sfx_t));
260 SND_InitScaletable ();
262 ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav", false);
263 ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav", false);
265 total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS; // no statics
266 memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
272 // =======================================================================
274 // =======================================================================
282 sfx_t *S_GetCached (const char *name)
286 if (!snd_initialized.integer)
290 Host_Error("S_IsCached: NULL\n");
292 if (strlen(name) >= MAX_QPATH)
293 Host_Error("Sound name too long: %s", name);
295 for(i = 0;i < num_sfx;i++)
296 if(!strcmp(known_sfx[i].name, name))
297 return &known_sfx[i];
308 sfx_t *S_FindName (char *name)
313 if (!snd_initialized.integer)
317 Host_Error("S_FindName: NULL\n");
319 if (strlen(name) >= MAX_QPATH)
320 Host_Error("Sound name too long: %s", name);
322 // see if already loaded
323 for (i = 0;i < num_sfx;i++)
324 if (!strcmp(known_sfx[i].name, name))
325 return &known_sfx[i];
327 if (num_sfx == MAX_SFX)
328 Sys_Error("S_FindName: out of sfx_t");
330 sfx = &known_sfx[num_sfx++];
331 memset(sfx, 0, sizeof(*sfx));
332 snprintf(sfx->name, sizeof(sfx->name), "%s", name);
343 void S_TouchSound (char *name)
347 sfx = S_FindName (name);
349 // Set the "used" flag for this sound
351 sfx->flags |= SFXFLAG_USED;
359 Reset the "used" flag of all precached sounds
362 void S_ClearUsed (void)
366 for (i = 0; i < num_sfx; i++)
367 known_sfx[i].flags &= ~SFXFLAG_USED;
375 Free all precached sounds without the "used" flag
378 void S_PurgeUnused (void)
383 for (i = 0; i < num_sfx; i++)
386 if (! (sfx->flags & SFXFLAG_USED))
398 sfx_t *S_PrecacheSound (char *name, int complain)
402 if (!snd_initialized.integer)
405 sfx = S_FindName(name);
407 if (!nosound.integer && snd_precache.integer)
408 S_LoadSound(sfx, complain);
414 //=============================================================================
421 channel_t *SND_PickChannel(int entnum, int entchannel)
427 // Check for replacement sound, or find the best one to replace
429 life_left = 0x7fffffff;
430 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++)
432 if (entchannel != 0 // channel 0 never overrides
433 && channels[ch_idx].entnum == entnum
434 && (channels[ch_idx].entchannel == entchannel || entchannel == -1) )
435 { // always override sound from same entity
436 first_to_die = ch_idx;
440 // don't let monster sounds override player sounds
441 if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx)
444 if (channels[ch_idx].end - paintedtime < life_left)
446 life_left = channels[ch_idx].end - paintedtime;
447 first_to_die = ch_idx;
451 if (first_to_die == -1)
454 if (channels[first_to_die].sfx)
455 channels[first_to_die].sfx = NULL;
457 return &channels[first_to_die];
465 void SND_Spatialize(channel_t *ch, int isstatic)
467 vec_t dist, scale, pan;
470 // anything coming from the view entity will always be full volume
471 // LordHavoc: make sounds with ATTN_NONE have no spatialization
472 if (ch->entnum == cl.viewentity || ch->dist_mult == 0)
474 ch->leftvol = ch->master_vol;
475 ch->rightvol = ch->master_vol;
479 // update sound origin if we know about the entity
480 if (ch->entnum > 0 && cls.state == ca_connected && cl_entities[ch->entnum].state_current.active)
482 //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]);
483 VectorCopy(cl_entities[ch->entnum].state_current.origin, ch->origin);
484 if (cl_entities[ch->entnum].state_current.modelindex && cl.model_precache[cl_entities[ch->entnum].state_current.modelindex]->soundfromcenter)
485 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);
488 // calculate stereo seperation and distance attenuation
489 VectorSubtract(ch->origin, listener_vieworigin, source_vec);
490 dist = VectorNormalizeLength(source_vec);
492 scale = ch->master_vol * (1.0 - (dist * ch->dist_mult));
494 pan = scale * DotProduct(listener_viewleft, source_vec);
495 // calculate the volumes
496 ch->leftvol = (int) (scale + pan);
497 ch->rightvol = (int) (scale - pan);
500 // LordHavoc: allow adjusting volume of static sounds
503 ch->leftvol *= snd_staticvolume.value;
504 ch->rightvol *= snd_staticvolume.value;
508 ch->leftvol = bound(0, ch->leftvol, 255);
509 ch->rightvol = bound(0, ch->rightvol, 255);
513 // =======================================================================
514 // Start a sound effect
515 // =======================================================================
517 void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
519 channel_t *target_chan, *check;
525 if (!sound_started || !sfx || !sfx->sfxcache || nosound.integer)
530 // pick a channel to play on
531 target_chan = SND_PickChannel(entnum, entchannel);
536 memset (target_chan, 0, sizeof(*target_chan));
537 VectorCopy(origin, target_chan->origin);
538 target_chan->dist_mult = attenuation / sound_nominal_clip_dist;
539 target_chan->master_vol = vol;
540 target_chan->entnum = entnum;
541 target_chan->entchannel = entchannel;
542 SND_Spatialize(target_chan, false);
544 // LordHavoc: spawn the sound anyway because the player might teleport to it
545 //if (!target_chan->leftvol && !target_chan->rightvol)
546 // return; // not audible at all
549 sc = S_LoadSound (sfx, true);
552 target_chan->sfx = NULL;
553 return; // couldn't load the sound's data
556 target_chan->sfx = sfx;
557 target_chan->pos = 0.0;
558 target_chan->end = paintedtime + sc->length;
560 // if an identical sound has also been started this frame, offset the pos
561 // a bit to keep it from just making the first one louder
562 check = &channels[NUM_AMBIENTS];
563 for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++)
565 if (check == target_chan)
567 if (check->sfx == sfx && !check->pos)
569 // LordHavoc: fixed skip calculations
570 skip = 0.1 * sc->speed;
571 if (skip > sc->length)
574 skip = rand() % skip;
575 target_chan->pos += skip;
576 target_chan->end -= skip;
582 void S_StopSound(int entnum, int entchannel)
586 for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++)
588 if (channels[i].entnum == entnum
589 && channels[i].entchannel == entchannel)
592 channels[i].sfx = NULL;
598 void S_StopAllSounds(qboolean clear)
600 total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS; // no statics
601 memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));
607 void S_StopAllSoundsC(void)
609 S_StopAllSounds(true);
612 void S_ClearBuffer(void)
616 if (!sound_started || !shm)
619 if (shm->samplebits == 8)
634 while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (LPVOID*)&pData, &dwSize, NULL, NULL, 0)) != DS_OK)
636 if (hresult != DSERR_BUFFERLOST)
638 Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n");
645 Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n");
651 memset(pData, clear, shm->samples * shm->samplebits/8);
653 pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);
660 int setsize = shm->samples * shm->samplebits / 8;
661 char *buf = shm->buffer;
666 // on i586/i686 optimized versions of glibc, glibc *wrongly* IMO,
667 // reads the memory area before writing to it causing a seg fault
668 // since the memory is PROT_WRITE only and not PROT_READ|PROT_WRITE
669 // memset(shm->buffer, clear, shm->samples * shm->samplebits/8);
679 void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
687 if (total_channels == MAX_CHANNELS)
689 Con_Printf ("total_channels == MAX_CHANNELS\n");
693 sc = S_LoadSound (sfx, true);
697 if (sc->loopstart == -1)
698 Con_DPrintf("Quake compatibility warning: Static sound \"%s\" is not looped\n", sfx->name);
700 ss = &channels[total_channels++];
701 memset(ss, 0, sizeof(*ss));
702 ss->forceloop = true;
704 VectorCopy (origin, ss->origin);
705 ss->master_vol = vol;
706 ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
707 ss->end = paintedtime + sc->length;
709 SND_Spatialize (ss, true);
713 //=============================================================================
717 S_UpdateAmbientSounds
720 void S_UpdateAmbientSounds (void)
725 qbyte ambientlevels[NUM_AMBIENTS];
727 // LordHavoc: kill ambient sounds until proven otherwise
728 for (ambient_channel = 0 ; ambient_channel < NUM_AMBIENTS;ambient_channel++)
729 channels[ambient_channel].sfx = NULL;
731 if (!snd_ambient || ambient_level.value <= 0 || !cl.worldmodel || !cl.worldmodel->brush.AmbientSoundLevelsForPoint)
734 cl.worldmodel->brush.AmbientSoundLevelsForPoint(cl.worldmodel, listener_vieworigin, ambientlevels, sizeof(ambientlevels));
736 // calc ambient sound levels
737 for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++)
739 if (ambient_sfx[ambient_channel] &&
740 (ambient_sfx[ambient_channel]->flags & SFXFLAG_SILENTLYMISSING))
742 chan = &channels[ambient_channel];
743 chan->forceloop = true;
744 chan->sfx = ambient_sfx[ambient_channel];
746 vol = ambient_level.value * ambientlevels[ambient_channel];
750 // don't adjust volume too fast
751 if (chan->master_vol < vol)
753 chan->master_vol += host_realframetime * ambient_fade.value;
754 if (chan->master_vol > vol)
755 chan->master_vol = vol;
757 else if (chan->master_vol > vol)
759 chan->master_vol -= host_realframetime * ambient_fade.value;
760 if (chan->master_vol < vol)
761 chan->master_vol = vol;
764 chan->leftvol = chan->rightvol = chan->master_vol;
773 Called once each time through the main loop
776 void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up)
783 if (!snd_initialized.integer || (snd_blocked > 0))
786 VectorCopy(origin, listener_vieworigin);
787 VectorCopy(forward, listener_viewforward);
788 VectorCopy(left, listener_viewleft);
789 VectorCopy(up, listener_viewup);
791 // update general area ambient sound sources
792 S_UpdateAmbientSounds ();
796 // update spatialization for static and dynamic sounds
797 ch = channels+NUM_AMBIENTS;
798 for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++)
802 SND_Spatialize(ch, i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS); // respatialize channel
803 if (!ch->leftvol && !ch->rightvol)
806 // try to combine static sounds with a previous channel of the same
807 // sound effect so we don't mix five torches every frame
809 if (i > MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS)
811 // see if it can just use the last one
812 if (combine && combine->sfx == ch->sfx)
814 combine->leftvol += ch->leftvol;
815 combine->rightvol += ch->rightvol;
816 ch->leftvol = ch->rightvol = 0;
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)
825 if (j == total_channels)
831 combine->leftvol += ch->leftvol;
832 combine->rightvol += ch->rightvol;
833 ch->leftvol = ch->rightvol = 0;
843 if (snd_show.integer)
847 for (i=0 ; i<total_channels; i++, ch++)
848 if (ch->sfx && (ch->leftvol || ch->rightvol) )
851 Con_Printf ("----(%i)----\n", total);
858 void GetSoundtime(void)
862 static int oldsamplepos;
865 fullsamples = shm->samples / shm->channels;
867 // it is possible to miscount buffers if it has wrapped twice between
868 // calls to S_Update. Oh well.
869 samplepos = SNDDMA_GetDMAPos();
871 if (samplepos < oldsamplepos)
873 buffers++; // buffer wrapped
875 if (paintedtime > 0x40000000)
876 { // time to chop things off to avoid 32 bit limits
878 paintedtime = fullsamples;
879 S_StopAllSounds (true);
882 oldsamplepos = samplepos;
884 soundtime = buffers*fullsamples + samplepos/shm->channels;
887 void IN_Accumulate (void);
889 void S_ExtraUpdate (void)
896 if (snd_noextraupdate.integer)
897 return; // don't pollute timings
906 if (!sound_started || (snd_blocked > 0))
912 // check to make sure that we haven't overshot
913 if (paintedtime < soundtime)
914 paintedtime = soundtime;
916 // mix ahead of current position
917 endtime = soundtime + _snd_mixahead.value * shm->speed;
918 samps = shm->samples >> (shm->channels-1);
919 if (endtime > (unsigned int)(soundtime + samps))
920 endtime = soundtime + samps;
923 // if the buffer was lost or stopped, restore it and/or restart it
929 if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
930 Con_Printf ("Couldn't get sound buffer status\n");
932 if (dwStatus & DSBSTATUS_BUFFERLOST)
933 pDSBuf->lpVtbl->Restore (pDSBuf);
935 if (!(dwStatus & DSBSTATUS_PLAYING))
936 pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);
941 S_PaintChannels (endtime);
947 ===============================================================================
951 ===============================================================================
954 static void S_Play_Common(float fvol, float attenuation)
963 if (!strrchr(Cmd_Argv(i), '.'))
964 snprintf(name, sizeof(name), "%s.wav", Cmd_Argv(i));
966 strlcpy(name, Cmd_Argv(i), sizeof(name));
967 sfx = S_PrecacheSound(name, true);
969 // If we need to get the volume from the command line
972 fvol = atof(Cmd_Argv(i+1));
978 S_StartSound(-1, 0, sfx, listener_vieworigin, fvol, attenuation);
984 S_Play_Common (1.0f, 1.0f);
989 S_Play_Common (1.0f, 0.0f);
994 S_Play_Common (-1.0f, 0.0f);
997 void S_SoundList(void)
1005 for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++)
1010 size = sc->length*sc->width*(sc->stereo+1);
1012 Con_Printf("%c(%2db) %6i : %s\n", sc->loopstart >= 0 ? 'L' : ' ',sc->width*8, size, sfx->name);
1015 Con_Printf("Total resident: %i\n", total);
1019 void S_LocalSound (char *sound)
1023 if (!snd_initialized.integer || nosound.integer)
1026 sfx = S_PrecacheSound (sound, true);
1029 Con_Printf ("S_LocalSound: can't precache %s\n", sound);
1032 S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1);
1036 #define RAWSAMPLESBUFFER 32768
1037 short s_rawsamplesbuffer[RAWSAMPLESBUFFER * 2];
1038 int s_rawsamplesbuffer_start;
1039 int s_rawsamplesbuffer_count;
1041 void S_RawSamples_Enqueue(short *samples, unsigned int length)
1044 //Con_Printf("S_RawSamples_Enqueue: %i samples\n", length);
1045 if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
1047 b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
1048 if (b2 + length > RAWSAMPLESBUFFER)
1050 b3 = (b2 + length) % RAWSAMPLESBUFFER;
1051 memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
1052 memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
1055 memcpy(s_rawsamplesbuffer + b2 * 2, samples, length * sizeof(short[2]));
1056 s_rawsamplesbuffer_count += length;
1059 void S_RawSamples_Dequeue(int *samples, unsigned int length)
1067 if (l > s_rawsamplesbuffer_count)
1068 l = s_rawsamplesbuffer_count;
1069 b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
1070 if (b1 + l > RAWSAMPLESBUFFER)
1072 b2 = (b1 + l) % RAWSAMPLESBUFFER;
1073 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
1074 //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
1075 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
1077 for (out = samples + (RAWSAMPLESBUFFER - b1) * 2, in = s_rawsamplesbuffer, count = b2 * 2, i = 0;i < count;i++)
1079 //Con_Printf("S_RawSamples_Dequeue: buffer wrap %i %i\n", (RAWSAMPLESBUFFER - b1), b2);
1083 //memcpy(samples, s_rawsamplesbuffer + b1 * 2, l * sizeof(short[2]));
1084 for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = l * 2, i = 0;i < count;i++)
1086 //Con_Printf("S_RawSamples_Dequeue: normal %i\n", l);
1088 if (l < (int)length)
1090 memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
1091 //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
1093 s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
1094 s_rawsamplesbuffer_count -= l;
1097 void S_RawSamples_ClearQueue(void)
1099 s_rawsamplesbuffer_count = 0;
1100 s_rawsamplesbuffer_start = 0;
1103 int S_RawSamples_QueueWantsMore(void)
1105 if (shm != NULL && s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
1106 return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
1111 void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
1113 if (inputlength != outputlength)
1115 int i, position, stopposition, step;
1117 step = (float) inputlength * 256.0f / (float) outputlength;
1119 stopposition = (inputlength - 1) << 8;
1121 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1123 in = input + ((position >> 8) << 1);
1124 out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
1125 out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
1128 stopposition = inputlength << 8;
1129 for (i = 0;i < outputlength && position < stopposition;i++, position += step)
1131 in = input + ((position >> 8) << 1);
1138 memcpy(output, input, inputlength * sizeof(short[2]));
1141 int S_RawSamples_SampleRate(void)
1143 return shm != NULL ? shm->speed : 0;