From 439645004bb672a29145621549cb87acdb2f84db Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 13 Oct 2019 23:28:16 +0200 Subject: [PATCH] avfilter/vf_lenscorrection: fix division by zero Fixes #8265 (cherry picked from commit 19587c9332f5be4f6bc6d7b2b8ef3fd21dfeaa01) Signed-off-by: Michael Niedermayer --- libavfilter/vf_lenscorrection.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/libavfilter/vf_lenscorrection.c b/libavfilter/vf_lenscorrection.c index 239fe195bd..43f3c1b7d0 100644 --- a/libavfilter/vf_lenscorrection.c +++ b/libavfilter/vf_lenscorrection.c @@ -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);