Hi!
Attached patch intends to fix ticket #7985.
Please comment, Carl Eugen
From 740f1a95336b70ff3f8e6d46f0c61115890ee3e7 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Tue, 2 Jul 2019 11:38:14 +0200
Subject: [PATCH] lavc/vc2enc_dwt: Avoid left-shifting a negative value.
Fixes ticket #7985.
---
libavcodec/vc2enc_dwt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/vc2enc_dwt.c b/libavcodec/vc2enc_dwt.c
index d22af8a313..a8d3f1c669 100644
--- a/libavcodec/vc2enc_dwt.c
+++ b/libavcodec/vc2enc_dwt.c
@@ -66,7 +66,7 @@ static void vc2_subband_dwt_97(VC2TransformContext *t, dwtcoef *data,
*/
for (y = 0; y < synth_height; y++) {
for (x = 0; x < synth_width; x++)
- synthl[x] = datal[x] << 1;
+ synthl[x] = datal[x] * 2;
synthl += synth_width;
datal += stride;
}
--
2.22.0
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