[FFmpeg-devel] [PATCH 10/11] avfilter/vf_ssim: use log10 instead of log()/log(10)

[Ganesh Ajjanagadde]

This is likely more precise and conveys the intent better.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
---
 libavfilter/vf_ssim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_ssim.c b/libavfilter/vf_ssim.c
index ce1e3db..6b2a8d7 100644
--- a/libavfilter/vf_ssim.c
+++ b/libavfilter/vf_ssim.c
@@ -176,7 +176,7 @@ static float ssim_plane(SSIMDSPContext *dsp,
 
 static double ssim_db(double ssim, double weight)
 {
-    return 10 * (log(weight) / log(10) - log(weight - ssim) / log(10));
+    return 10 * (log10(weight) - log10(weight - ssim));
 }
 
 static AVFrame *do_ssim(AVFilterContext *ctx, AVFrame *main,
-- 
2.6.2