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swscale: fix another integer overflow.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit 791de61bbb0d2bceb1037597b310e2a4a94494fd)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Ronald S. Bultje 2012-02-28 18:21:31 -08:00 committed by Reinhard Tartler
parent f28ec73379
commit 4f64456a14
1 changed files with 1 additions and 1 deletions
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libswscale/utils.c
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@ -1002,7 +1002,7 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
c->vLumBufSize= c->vLumFilterSize;
c->vChrBufSize= c->vChrFilterSize;
for (i=0; i<dstH; i++) {
int chrI= i*c->chrDstH / dstH;
int chrI = (int64_t) i * c->chrDstH / dstH;
int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));