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

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-07-04 10:21:14 +02:00
parent cbbd330abc
commit 1212041c91
1 changed files with 2 additions and 2 deletions
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libavfilter/vf_ssim.c
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@ -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;