42c43d960f
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@2379 fc73d0e0-1445-4013-8a0c-d673dee63da5
518 lines
12 KiB
C
518 lines
12 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// snd_mix.c -- portable code to mix sounds for snd_dma.c
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#include "quakedef.h"
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#ifndef NOSOUNDASM
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#define NOSOUNDASM //since channels per sound card went to 6 (portable_samplegroup_t was changed)
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#endif
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#define PAINTBUFFER_SIZE 2048
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portable_samplegroup_t paintbuffer[PAINTBUFFER_SIZE];
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int *snd_p, snd_vol;
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short *snd_out;
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static int paintskip[6][6] =
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{
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{6},
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{1, 5},
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{1, 1, 4},
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{1, 1, 1, 3},
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{1, 1, 1, 1, 2},
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{1, 1, 1, 1, 1, 1}
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};
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static int chnskip[6][6] =
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{
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{0},
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{1, -1},
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{1, 1, -2},
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{1, 1, 1, -3},
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{1, 1, 1, 1, -4},
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{1, 1, 1, 1, 1, -5}
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};
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void S_TransferPaintBuffer(soundcardinfo_t *sc, int endtime)
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{
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int startidx, out_idx;
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int count;
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int outlimit;
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int *p;
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int *skip;
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int *cskip;
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int val;
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int snd_vol;
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short *pbuf;
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p = (int *) paintbuffer;
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skip = paintskip[sc->sn.numchannels-1];
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cskip = chnskip[sc->sn.numchannels-1];
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count = (endtime - sc->paintedtime) * sc->sn.numchannels;
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outlimit = sc->sn.samples;
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startidx = out_idx = (sc->paintedtime * sc->sn.numchannels) % outlimit;
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snd_vol = volume.value*256;
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pbuf = sc->Lock(sc);
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if (!pbuf)
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return;
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if (sc->sn.samplebits == 16)
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{
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short *out = (short *) pbuf;
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while (count--)
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{
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val = (*p * snd_vol) >> 8;
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p += *skip;
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if (val > 0x7fff)
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val = 0x7fff;
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else if (val < (short)0x8000)
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val = (short)0x8000;
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out[out_idx] = val;
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out_idx = (out_idx + 1) % outlimit;
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skip += *cskip;
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cskip += *cskip;
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}
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}
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else if (sc->sn.samplebits == 8)
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{
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unsigned char *out = (unsigned char *) pbuf;
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while (count--)
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{
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val = (*p * snd_vol) >> 8;
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p += *skip;
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if (val > 0x7fff)
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val = 0x7fff;
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else if (val < (short)0x8000)
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val = (short)0x8000;
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out[out_idx] = (val>>8) + 128;
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out_idx = (out_idx + 1) % outlimit;
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skip += *cskip;
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cskip += *cskip;
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}
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}
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sc->Unlock(sc, pbuf);
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}
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/*
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===============================================================================
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CHANNEL MIXING
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===============================================================================
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*/
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void SND_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int endtime);
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//void SND_PaintChannelFrom8Duel (channel_t *ch, sfxcache_t *sc, int endtime);
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void SND_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int endtime);
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void SND_PaintChannelFrom8_4Speaker (channel_t *ch, sfxcache_t *sc, int count);
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void SND_PaintChannelFrom16_4Speaker (channel_t *ch, sfxcache_t *sc, int count);
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void SND_PaintChannelFrom8_6Speaker (channel_t *ch, sfxcache_t *sc, int count);
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void SND_PaintChannelFrom16_6Speaker (channel_t *ch, sfxcache_t *sc, int count);
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void SND_PaintChannelFrom8Stereo (channel_t *ch, sfxcache_t *sc, int count);
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void SND_PaintChannelFrom16Stereo (channel_t *ch, sfxcache_t *sc, int count);
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void S_PaintChannels(soundcardinfo_t *sc, int endtime)
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{
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int i, j;
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int end;
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channel_t *ch;
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sfxcache_t *scache;
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sfx_t *s;
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int ltime, count;
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// sc->rawstart += sc->paintedtime - sc->oldpaintedtime;
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// sc->oldpaintedtime = sc->paintedtime;
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while (sc->paintedtime < endtime)
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{
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// if paintbuffer is smaller than DMA buffer
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end = endtime;
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if (endtime - sc->paintedtime > PAINTBUFFER_SIZE)
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end = sc->paintedtime + PAINTBUFFER_SIZE;
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// clear the paint buffer
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Q_memset(paintbuffer, 0, (end - sc->paintedtime) * sizeof(portable_samplegroup_t));
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// paint in the channels.
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ch = sc->channel;
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for (i=0; i<sc->total_chans ; i++, ch++)
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{
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if (!ch->sfx)
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continue;
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if (!ch->vol[0] && !ch->vol[1] && !ch->vol[2] && !ch->vol[3] && !ch->vol[4] && !ch->vol[5])
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continue;
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scache = S_LoadSound (ch->sfx);
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if (!scache)
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continue;
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if (ch->pos > scache->length) //cache was flushed and gamedir changed.
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{
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ch->pos = scache->length;
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ch->end = scache->length;
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}
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ltime = sc->paintedtime;
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if (ch->sfx->decoder)
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{
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int len_diff;
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soundcardinfo_t *sndc;
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#define qmax(x, y) (x>y)?(x):(y)
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len_diff = scache->length;
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// start = ch->end - scache->length;
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// samples = end - start;
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ch->sfx->decoder->decodemore(ch->sfx,
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end - (ch->end - scache->length) + 1);
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// ch->pos + end-ltime+1);
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scache = S_LoadSound (ch->sfx);
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if (!scache)
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continue;
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len_diff = scache->length - len_diff;
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for (sndc = sndcardinfo; sndc; sndc=sndc->next)
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{
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for (j = 0; j < sndc->total_chans; j++)
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if (sndc->channel[j].sfx == ch->sfx) //extend all of these.
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ch->end += len_diff;
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}
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}
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while (ltime < end)
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{ // paint up to end
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if (ch->end < end)
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count = ch->end - ltime;
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else
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count = end - ltime;
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if (count > 0)
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{
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if (ch->pos < 0) //delay the sound a little
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{
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if (count > -ch->pos)
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count = -ch->pos;
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ltime += count;
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ch->pos += count;
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continue;
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}
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if (scache->width == 1)
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{
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if (scache->numchannels==2)
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SND_PaintChannelFrom8Stereo(ch, scache, count);
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else if (sc->sn.numchannels == 6)
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SND_PaintChannelFrom8_6Speaker(ch, scache, count);
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else if (sc->sn.numchannels == 4)
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SND_PaintChannelFrom8_4Speaker(ch, scache, count);
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else
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SND_PaintChannelFrom8(ch, scache, count);
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}
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else
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{
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if (scache->numchannels==2)
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SND_PaintChannelFrom16Stereo(ch, scache, count);
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else if (sc->sn.numchannels == 6)
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SND_PaintChannelFrom16_6Speaker(ch, scache, count);
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else if (sc->sn.numchannels == 4)
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SND_PaintChannelFrom16_4Speaker(ch, scache, count);
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else
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SND_PaintChannelFrom16(ch, scache, count);
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}
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ltime += count;
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}
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// if at end of loop, restart
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if (ltime >= ch->end)
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{
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if (scache->loopstart >= 0)
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{
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if (scache->length == scache->loopstart)
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break;
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ch->pos = scache->loopstart;
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ch->end = ltime + scache->length - ch->pos;
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if (!scache->length)
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{
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scache->loopstart=-1;
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break;
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}
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}
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else if (ch->looping && scache->length)
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{
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ch->pos = 0;
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ch->end = ltime + scache->length - ch->pos;
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}
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else
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{ // channel just stopped
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s = ch->sfx;
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ch->sfx = NULL;
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if (s->decoder)
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{
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if (!S_IsPlayingSomewhere(s))
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s->decoder->abort(s);
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}
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break;
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}
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}
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}
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}
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// transfer out according to DMA format
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S_TransferPaintBuffer(sc, end);
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sc->paintedtime = end;
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}
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}
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//if defined(NOSOUNDASM) || !id386
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void SND_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count)
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{
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int data;
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signed char *sfx;
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int i;
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if (ch->vol[0] > 255)
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ch->vol[0] = 255;
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if (ch->vol[1] > 255)
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ch->vol[1] = 255;
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sfx = (signed char *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[i];
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paintbuffer[i].s[0] += ch->vol[0] * data;
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paintbuffer[i].s[1] += ch->vol[1] * data;
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}
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ch->pos += count;
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}
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#if 0
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void SND_PaintChannelFrom8Duel (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx1, *sfx2;
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int i;
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if (ch->vol[0] > 255)
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ch->vol[0] = 255;
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if (ch->vol[1] > 255)
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ch->vol[1] = 255;
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i = ch->pos - ch->delay[0];
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if (i < 0) i = 0;
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sfx1 = (signed char *)sc->data + i;
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i = ch->pos - ch->delay[1];
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if (i < 0) i = 0;
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sfx2 = (signed char *)sc->data + i;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx1[i];
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paintbuffer[i].s[1] += ch->vol[1] * sfx2[i];
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}
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ch->pos += count;
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}
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#endif
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//endif // !id386
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void SND_PaintChannelFrom8Stereo (channel_t *ch, sfxcache_t *sc, int count)
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{
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// int data;
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signed char *sfx;
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int i;
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if (ch->vol[0] > 255)
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ch->vol[0] = 255;
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if (ch->vol[1] > 255)
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ch->vol[1] = 255;
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sfx = (signed char *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx[(i<<1)];
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paintbuffer[i].s[1] += ch->vol[1] * sfx[(i<<1)+1];
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom8_4Speaker (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx;
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int i;
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if (ch->vol[0] > 255)
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ch->vol[0] = 255;
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if (ch->vol[1] > 255)
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ch->vol[1] = 255;
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if (ch->vol[2] > 255)
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ch->vol[2] = 255;
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if (ch->vol[3] > 255)
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ch->vol[3] = 255;
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sfx = (signed char *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
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paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
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paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
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paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom8_6Speaker (channel_t *ch, sfxcache_t *sc, int count)
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{
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signed char *sfx;
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int i;
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if (ch->vol[0] > 255)
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ch->vol[0] = 255;
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if (ch->vol[1] > 255)
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ch->vol[1] = 255;
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if (ch->vol[2] > 255)
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ch->vol[2] = 255;
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if (ch->vol[3] > 255)
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ch->vol[3] = 255;
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if (ch->vol[4] > 255)
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ch->vol[4] = 255;
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if (ch->vol[5] > 255)
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ch->vol[5] = 255;
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sfx = (signed char *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
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paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
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paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
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paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
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paintbuffer[i].s[4] += ch->vol[4] * sfx[i];
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paintbuffer[i].s[5] += ch->vol[5] * sfx[i];
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count)
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{
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int data;
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int left, right;
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int leftvol, rightvol;
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signed short *sfx;
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int i;
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leftvol = ch->vol[0];
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rightvol = ch->vol[1];
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sfx = (signed short *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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data = sfx[i];
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left = (data * leftvol) >> 8;
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right = (data * rightvol) >> 8;
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paintbuffer[i].s[0] += left;
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paintbuffer[i].s[1] += right;
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom16Stereo (channel_t *ch, sfxcache_t *sc, int count)
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{
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int leftvol, rightvol;
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signed short *sfx;
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int i;
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leftvol = ch->vol[0];
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rightvol = ch->vol[1];
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sfx = (signed short *)sc->data + ch->pos*2;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += (*sfx++ * leftvol) >> 8;
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paintbuffer[i].s[1] += (*sfx++ * rightvol) >> 8;
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom16_6Speaker (channel_t *ch, sfxcache_t *sc, int count)
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{
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int vol[6];
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signed short *sfx;
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int i;
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vol[0] = ch->vol[0];
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vol[1] = ch->vol[1];
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vol[2] = ch->vol[2];
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vol[3] = ch->vol[3];
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vol[4] = ch->vol[4];
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vol[5] = ch->vol[5];
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sfx = (signed short *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
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paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
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paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
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paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
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paintbuffer[i].s[4] += (sfx[i] * vol[4]) >> 8;
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paintbuffer[i].s[5] += (sfx[i] * vol[5]) >> 8;
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}
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ch->pos += count;
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}
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void SND_PaintChannelFrom16_4Speaker (channel_t *ch, sfxcache_t *sc, int count)
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{
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int vol[4];
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signed short *sfx;
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int i;
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vol[0] = ch->vol[0];
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vol[1] = ch->vol[1];
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vol[2] = ch->vol[2];
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vol[3] = ch->vol[3];
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sfx = (signed short *)sc->data + ch->pos;
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for (i=0 ; i<count ; i++)
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{
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paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
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paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
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paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
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paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
|
|
}
|
|
|
|
ch->pos += count;
|
|
}
|