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swscale/utils: add asserts to check filterpos

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-02-24 00:35:11 +01:00
parent 1895d414aa
commit fb8e5044b4
1 changed files with 7 additions and 0 deletions
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7
libswscale/utils.c
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@ -631,6 +631,13 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos,
(*filterPos)[i]-= shift;
filter[i * filterSize + srcW - 1 - (*filterPos)[i]] += acc;
}
av_assert0((*filterPos)[i] >= 0);
av_assert0((*filterPos)[i] < srcW);
if ((*filterPos)[i] + filterSize > srcW) {
for (j = 0; j < filterSize; j++) {
av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
}
}
}
// Note the +1 is for the MMX scaler which reads over the end