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the case of a decreasing phase shift (ie left_phase or right_phase) has been

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fixed. now just for increasing phase shift
This commit is contained in:
Bill Currie 2000-10-11 23:31:25 +00:00
parent 998b736326
commit d5ce749289
1 changed files with 14 additions and 8 deletions
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22
source/snd_mix.c
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@ -414,13 +414,9 @@ void SND_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count)
ch->pos += count; ch->pos += count;
if (oldphase >= 0) { if (oldphase >= 0) {
ldir = dir;
rdir = 0;
left_phase = oldphase; left_phase = oldphase;
right_phase = 0; right_phase = 0;
} else { } else {
ldir = 0;
rdir = dir;
left_phase = 0; left_phase = 0;
right_phase = -oldphase; right_phase = -oldphase;
} }
@ -438,22 +434,32 @@ void SND_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count)
if ((oldphase ^ phase) & ~((~0u)>>1)) { if ((oldphase ^ phase) & ~((~0u)>>1)) {
// phase change crosses 0 // phase change crosses 0
int t;
c = min (count, abs(oldphase)); c = min (count, abs(oldphase));
count -= c; count -= c;
if (oldphase > 0) {
ldir = -1;
rdir = 0;
} else {
ldir = 0;
rdir = -1;
}
for ( ; c; c--, i++) { for ( ; c; c--, i++) {
PAINT_CHANNELS; PAINT_CHANNELS;
left_phase += ldir; left_phase += ldir;
right_phase += rdir; right_phase += rdir;
} }
t = ldir;
ldir = rdir & 1;
rdir = t & 1;
oldphase = 0; oldphase = 0;
} }
// oldphase and phase [now] on same size of 0 // oldphase and phase [now] on same size of 0
c = min (count, abs (phase - oldphase)); c = min (count, abs (phase - oldphase));
count -= c; count -= c;
if (phase > 0) {
ldir = dir;
rdir = 0;
} else {
ldir = 0;
rdir = dir;
}
for ( ; c; c--, i++) { for ( ; c; c--, i++) {
PAINT_CHANNELS; PAINT_CHANNELS;
left_phase += ldir; left_phase += ldir;