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fteqw/engine/client/snd_mix.c

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