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swscale: fix filtersize clipping.

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if srcW<=2, clip(x, 1, srcW-2) still allows srcW to be < 1.
This commit is contained in:
Ronald S. Bultje 2012-02-22 14:51:37 -08:00
parent 562ebc3077
commit 1254022ea7
1 changed files with 2 additions and 1 deletions
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3
libswscale/utils.c
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@ -263,7 +263,8 @@ static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSi
if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
filterSize = av_clip(filterSize, 1, srcW - 2);
filterSize = FFMIN(filterSize, srcW - 2);
filterSize = FFMAX(filterSize, 1);
FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);