[FFmpeg-cvslog] avfilter/vf_neighbor: check if width is 1

[Paul B Mahol]

ffmpeg | branch: release/4.1 | Paul B Mahol <onemda at gmail.com> | Fri Oct 11 06:18:10 2019 -0300| [f5da6cff3504978bf6e713996988dcef0691d800] | committer: James Almer

avfilter/vf_neighbor: check if width is 1

Fixes #8242

(cherry picked from commit e787f8fd7ee99ba0c3e0f086ce2ce59eea7ed86c)
Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f5da6cff3504978bf6e713996988dcef0691d800
---

 libavfilter/vf_neighbor.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavfilter/vf_neighbor.c b/libavfilter/vf_neighbor.c
index 2db1e5e57c..f84a33ef75 100644
--- a/libavfilter/vf_neighbor.c
+++ b/libavfilter/vf_neighbor.c
@@ -285,9 +285,11 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
                                                src + (width - 2) * bpc,                                                      src + (width - 2) * bpc,
                                                src + (width - 2) * bpc + ph * stride, src + (width - 1) * bpc + ph * stride, src + (width - 2) * bpc + ph * stride};
 
-            s->filter(dst,                     src,                     1,         threshold, coordinateslb, s->coordinates);
-            s->filter(dst          + 1  * bpc, src          + 1  * bpc, width - 2, threshold, coordinates,   s->coordinates);
-            s->filter(dst + (width - 1) * bpc, src + (width - 1) * bpc, 1,         threshold, coordinatesrb, s->coordinates);
+            s->filter(dst,                         src,                     1,         threshold, coordinateslb, s->coordinates);
+            if (width > 1) {
+                s->filter(dst          + 1  * bpc, src          + 1  * bpc, width - 2, threshold, coordinates,   s->coordinates);
+                s->filter(dst + (width - 1) * bpc, src + (width - 1) * bpc, 1,         threshold, coordinatesrb, s->coordinates);
+            }
 
             src += stride;
             dst += dstride;