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resample2: fix potential overflow

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a39b5e8b32)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-10-27 14:34:45 +02:00
parent e124c3c298
commit d39cc3c092
1 changed files with 2 additions and 3 deletions
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5
libavcodec/resample2.c
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@@ -227,10 +227,9 @@ int av_resample(AVResampleContext *c, short *dst, short *src, int *consumed, int
dst[dst_index] = src[index2>>32];
index2 += incr;
}
frac += dst_index * dst_incr_frac;
index += dst_index * dst_incr;
index += frac / c->src_incr;
frac %= c->src_incr;
index += (frac + dst_index * (int64_t)dst_incr_frac) / c->src_incr;
frac = (frac + dst_index * (int64_t)dst_incr_frac) % c->src_incr;
}else{
for(dst_index=0; dst_index < dst_size; dst_index++){
FELEM *filter= c->filter_bank + c->filter_length*(index & c->phase_mask);