[FFmpeg-cvslog] avfilter/vf_idet: use exp2()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon Nov  3 17:22:33 2014 +0100| [898635ad9ec9cadc3c45b61fba97a471f2be7d27] | committer: Michael Niedermayer

avfilter/vf_idet: use exp2()

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=898635ad9ec9cadc3c45b61fba97a471f2be7d27
---

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

diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c
index a059565..40b2616 100644
--- a/libavfilter/vf_idet.c
+++ b/libavfilter/vf_idet.c
@@ -324,7 +324,7 @@ static av_cold int init(AVFilterContext *ctx)
     memset(idet->history, UNDETERMINED, HIST_SIZE);
 
     if( idet->half_life > 0 )
-        idet->decay_coefficient = (uint64_t) round( PRECISION * pow(2.0,-1.0 / idet->half_life) );
+        idet->decay_coefficient = (uint64_t) round( PRECISION * exp2(-1.0 / idet->half_life) );
     else
         idet->decay_coefficient = PRECISION;