[FFmpeg-cvslog] avfilter/vf_hqdn3d: fix left shift of negative numbers

[Valerii Zapodovnikov]

ffmpeg | branch: master | Valerii Zapodovnikov <val.zapod.vz at gmail.com> | Mon May 24 06:42:32 2021 +0300| [ff0d70c8a9c2d9266da20039cb1a98ed20b6df12] | committer: Michael Niedermayer

avfilter/vf_hqdn3d: fix left shift of negative numbers

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ff0d70c8a9c2d9266da20039cb1a98ed20b6df12
---

 libavfilter/vf_hqdn3d.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_hqdn3d.c b/libavfilter/vf_hqdn3d.c
index 8d71ae316d..bd3eb2d01c 100644
--- a/libavfilter/vf_hqdn3d.c
+++ b/libavfilter/vf_hqdn3d.c
@@ -179,7 +179,7 @@ static void precalc_coefs(double dist25, int depth, int16_t *ct)
 
     gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
 
-    for (i = -256<<LUT_BITS; i < 256<<LUT_BITS; i++) {
+    for (i = -(256<<LUT_BITS); i < 256<<LUT_BITS; i++) {
         double f = ((i<<(9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin
         simil = FFMAX(0, 1.0 - fabs(f) / 255.0);
         C = pow(simil, gamma) * 256.0 * f;