Now with actual patch…
-Thilo
From 25e875c330e76c2c6be30231e9730fa3a2f30115 Mon Sep 17 00:00:00 2001
From: Thilo Borgmann <thilo.borgm...@mail.de>
Date: Sat, 4 Jun 2022 13:45:30 +0200
Subject: [PATCH 1/2] lavfi/blockdetect: Fix possible div by 0
Found-by Covererity, CID 1504568, 1504569
---
libavfilter/vf_blockdetect.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavfilter/vf_blockdetect.c b/libavfilter/vf_blockdetect.c
index 8503b8d..85fca68 100644
--- a/libavfilter/vf_blockdetect.c
+++ b/libavfilter/vf_blockdetect.c
@@ -132,8 +132,10 @@ static float calculate_blockiness(BLKContext *s, int w,
int h,
nonblock_count++;
}
}
+ if (block_count && nonblock_count) {
temp = (block / block_count) / (nonblock / nonblock_count);
ret = FFMAX(ret, temp);
+ }
}
// vertical blockiness (fixed height)
@@ -175,8 +177,10 @@ static float calculate_blockiness(BLKContext *s, int w,
int h,
nonblock_count++;
}
}
+ if (block_count && nonblock_count) {
temp = (block / block_count) / (nonblock / nonblock_count);
ret = FFMAX(ret, temp);
+ }
}
// return highest value of horz||vert
--
1.8.3.2
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