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avfilter/vf_lenscorrection: fix division by zero 

Fixes #8265
This commit is contained in:
Paul B Mahol 2019-10-13 23:28:16 +02:00
parent 07050d7bdc
commit 19587c9332
1 changed files with 2 additions and 4 deletions
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6
libavfilter/vf_lenscorrection.c
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@ -155,10 +155,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
for (plane = 0; plane < rect->nb_planes; ++plane) {
int hsub = plane == 1 || plane == 2 ? rect->hsub : 0;
int vsub = plane == 1 || plane == 2 ? rect->vsub : 0;
int hdiv = 1 << hsub;
int vdiv = 1 << vsub;
int w = rect->width / hdiv;
int h = rect->height / vdiv;
int w = AV_CEIL_RSHIFT(rect->width, hsub);
int h = AV_CEIL_RSHIFT(rect->height, vsub);
int xcenter = rect->cx * w;
int ycenter = rect->cy * h;
int k1 = rect->k1 * (1<<24);