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avfilter/vf_psnr: avoid 64bit arithmetic in the inner loop

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-21 03:02:20 +02:00
parent a11c16a0b0
commit 68f328fcdd
1 changed files with 3 additions and 1 deletions
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4
libavfilter/vf_psnr.c
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@ -94,8 +94,10 @@ void compute_images_mse(PSNRContext *s,
uint64_t m = 0;
for (i = 0; i < outh; i++) {
int m2 = 0;
for (j = 0; j < outw; j++)
m += pow2(main_line[j] - ref_line[j]);
m2 += pow2(main_line[j] - ref_line[j]);
m += m2;
ref_line += ref_linesize;
main_line += main_linesize;
}