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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-09-21 03:02:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-09-21 03:11:02 +0200 |
| commit | 68f328fcdd147a56c228abd6794a923f534138fb (patch) | |
| tree | f7824a2a639995e639c97ea5c9b807431e92b39f | |
| parent | a11c16a0b0cadf3a14fa5e7329c2a144a2165bc6 (diff) | |
| download | ffmpeg-68f328fcdd147a56c228abd6794a923f534138fb.tar.gz | |
avfilter/vf_psnr: avoid 64bit arithmetic in the inner loop
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavfilter/vf_psnr.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavfilter/vf_psnr.c b/libavfilter/vf_psnr.c index 1bcdd7de5c..bb0dbe0681 100644 --- a/libavfilter/vf_psnr.c +++ b/libavfilter/vf_psnr.c @@ -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; } |