[FFmpeg-cvslog] avfilter/vf_ssim: use unsigned so result can be properly stored

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Tue Jul  4 10:21:14 2017 +0200| [1212041c91b724da77c83f14980440115433e773] | committer: Paul B Mahol

avfilter/vf_ssim: use unsigned so result can be properly stored

Signed-off-by: Paul B Mahol <onemda at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1212041c91b724da77c83f14980440115433e773
---

 libavfilter/vf_ssim.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vf_ssim.c b/libavfilter/vf_ssim.c
index fa2c2c1406..c3c204268f 100644
--- a/libavfilter/vf_ssim.c
+++ b/libavfilter/vf_ssim.c
@@ -109,8 +109,8 @@ static void ssim_4x4xn_16bit(const uint8_t *main8, ptrdiff_t main_stride,
 
         for (y = 0; y < 4; y++) {
             for (x = 0; x < 4; x++) {
-                int a = main16[x + y * main_stride];
-                int b = ref16[x + y * ref_stride];
+                unsigned a = main16[x + y * main_stride];
+                unsigned b = ref16[x + y * ref_stride];
 
                 s1  += a;
                 s2  += b;