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psnr.c: use int64_t for sum of differences

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Since the values can be negative.

Change-Id: Idda69e9fb47bb34696aeb20170341a0191c5d85e
This commit is contained in:
Yaowu Xu
2016-06-28 09:53:11 -07:00
parent 32ac7cabdf
commit d34b49d7b9
1 changed files with 2 additions and 2 deletions
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4
vpx_dsp/psnr.c
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@@ -51,7 +51,7 @@ static void encoder_variance(const uint8_t *a, int a_stride,
static void encoder_highbd_variance64(const uint8_t *a8, int a_stride,
const uint8_t *b8, int b_stride,
int w, int h, uint64_t *sse,
uint64_t *sum) {
int64_t *sum) {
int i, j;
uint16_t *a = CONVERT_TO_SHORTPTR(a8);
@@ -75,7 +75,7 @@ static void encoder_highbd_8_variance(const uint8_t *a8, int a_stride,
int w, int h,
unsigned int *sse, int *sum) {
uint64_t sse_long = 0;
uint64_t sum_long = 0;
int64_t sum_long = 0;
encoder_highbd_variance64(a8, a_stride, b8, b_stride, w, h,
&sse_long, &sum_long);
*sse = (unsigned int)sse_long;