ffmpeg | branch: release/3.4 | Andreas Rheinhardt
<[email protected]> | Sat Sep 28 04:26:10 2019 +0200|
[5367c91e021d5c790f41a8f071d60806bd1007f3] | committer: Andreas Rheinhardt
avcodec/jpeg2000dwt: Fix undefined shifts of negative numbers
Affected the vsynth*-jpeg2000 and the vsynth*-jpeg2000-97 FATE tests
(where * ranges over { 1, 2, 3, _lena }) as well as ticket #7983.
Signed-off-by: Andreas Rheinhardt <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 5cf593adcd79a7c9502dc2725e1f0681ada36aef)
Signed-off-by: Andreas Rheinhardt <[email protected]>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5367c91e021d5c790f41a8f071d60806bd1007f3
---
libavcodec/jpeg2000dwt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index badf0f8cd0..f418454ee9 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -255,7 +255,7 @@ static void dwt_encode97_int(DWTContext *s, int *t)
line += 5;
for (i = 0; i < w * h; i++)
- t[i] <<= I_PRESHIFT;
+ t[i] *= 1 << I_PRESHIFT;
for (lev = s->ndeclevels-1; lev >= 0; lev--){
int lh = s->linelen[lev][0],
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