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swr: minor simplification for the noise shaping pos update

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Michael Niedermayer 2013-01-12 17:25:19 +01:00
parent f9eed5d7e6
commit b5d9e5d06c
1 changed files with 1 additions and 1 deletions
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libswresample/dither_template.c
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@ -38,7 +38,7 @@ void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData
double d1, d = src[i]*S_1;
for(j=0; j<taps; j++)
d -= s->dither.ns_coeffs[j] * s->dither.ns_errors[ch][pos + j];
pos = pos ? pos - 1 : pos - 1 + taps;
pos = pos ? pos - 1 : taps - 1;
d1 = rint(d + noise[i]);
s->dither.ns_errors[ch][pos + taps] = s->dither.ns_errors[ch][pos] = d1 - d;
d1 *= S;