[FFmpeg-cvslog] sonic: use M_SQRT2

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed May  4 17:20:49 2011 +0200| [8477e63d3c23feacb9626d58c0e966eded4016f4] | committer: Michael Niedermayer

sonic: use M_SQRT2
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8477e63d3c23feacb9626d58c0e966eded4016f4
---

 libavcodec/sonic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index 31bbe46..3824c1f 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -701,7 +701,7 @@ static int sonic_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
         }
 
         energy2 = sqrt(energy2/(s->channels*s->block_align));
-        energy1 = sqrt(2.0)*energy1/(s->channels*s->block_align);
+        energy1 = M_SQRT2*energy1/(s->channels*s->block_align);
 
         // increase bitrate when samples are like a gaussian distribution
         // reduce bitrate when samples are like a two-tailed exponential distribution