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aacpsy: calc_reduction_3gpp() handle active_lines = 0

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Michael Niedermayer 2012-09-14 03:26:19 +02:00
parent 062091f87f
commit 413b32f808
1 changed files with 3 additions and 0 deletions
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libavcodec/aacpsy.c
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@ -526,6 +526,9 @@ static float calc_reduction_3gpp(float a, float desired_pe, float pe,
{
float thr_avg, reduction;
if(active_lines == 0.0)
return 0;
thr_avg = exp2f((a - pe) / (4.0f * active_lines));
reduction = exp2f((a - desired_pe) / (4.0f * active_lines)) - thr_avg;