[FFmpeg-cvslog] avfilter/af_volumedetect: use log10 instead of hardcoded constant

[Ganesh Ajjanagadde]

ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanagadde at gmail.com> | Thu Oct 29 00:12:53 2015 -0400| [8c2438053786f10c5dc282dddd103b7a53570b47] | committer: Ganesh Ajjanagadde

avfilter/af_volumedetect: use log10 instead of hardcoded constant

This is likely more precise and conveys the intent better.

Reviewed-by: Mark Harris <mark.hsj at gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8c2438053786f10c5dc282dddd103b7a53570b47
---

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

diff --git a/libavfilter/af_volumedetect.c b/libavfilter/af_volumedetect.c
index 01f24ba..4815bcc 100644
--- a/libavfilter/af_volumedetect.c
+++ b/libavfilter/af_volumedetect.c
@@ -78,7 +78,7 @@ static inline double logdb(uint64_t v)
     double d = v / (double)(0x8000 * 0x8000);
     if (!v)
         return MAX_DB;
-    return log(d) * -4.3429448190325182765112891891660508229; /* -10/log(10) */
+    return -log10(d) * 10;
 }
 
 static void print_stats(AVFilterContext *ctx)