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lowpass filter: read samples centered around the dest sample

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This commit is contained in:
Eric Wasylishen 2011-12-28 01:18:17 -07:00
parent 873cacda47
commit 34079f1ae1
1 changed files with 2 additions and 3 deletions
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5
Quake/snd_mem.c
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@ -109,7 +109,6 @@ static void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
}
// poor man's low pass filter:
// s[i] = (s[i] + s[i+1] + s[i+2] + s[i+3]) / 4
const int avg = 4;
char temp[sc->width * sc->length];
@ -118,9 +117,9 @@ static void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
{
int64_t sum = 0;
int j;
for (j=0; j<avg; j++)
for (j = (i-(avg/2)); j < (i-(avg/2)) + avg; j++)
{
int pos = CLAMP(0, i + j, outcount - 1);
int pos = CLAMP(0, j, outcount - 1);
sum += getsample(sc->data, sc->width, pos);
}
sum /= avg;