[FFmpeg-cvslog] avfilter/vf_psnr: use log10 instead of log()/log(10)

[Ganesh Ajjanagadde]

ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanagadde at gmail.com> | Thu Oct 29 00:16:34 2015 -0400| [59d37f5a4e7014ee0e44af051f092fff9917399b] | committer: Ganesh Ajjanagadde

avfilter/vf_psnr: use log10 instead of log()/log(10)

This is likely more precise and conveys the intent better.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=59d37f5a4e7014ee0e44af051f092fff9917399b
---

 libavfilter/vf_psnr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_psnr.c b/libavfilter/vf_psnr.c
index 36bbab2..bce5c51 100644
--- a/libavfilter/vf_psnr.c
+++ b/libavfilter/vf_psnr.c
@@ -72,7 +72,7 @@ static inline unsigned pow2(unsigned base)
 
 static inline double get_psnr(double mse, uint64_t nb_frames, int max)
 {
-    return 10.0 * log(pow2(max) / (mse / nb_frames)) / log(10.0);
+    return 10.0 * log10(pow2(max) / (mse / nb_frames));
 }
 
 static uint64_t sse_line_8bit(const uint8_t *main_line,  const uint8_t *ref_line, int outw)