[FFmpeg-cvslog] atrac3: replace powf(2,...) by exp2f()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon Sep 10 22:32:56 2012 +0200| [c5f0b6bf410ca9921cf61627ed1cba38d09b0725] | committer: Michael Niedermayer

atrac3: replace powf(2,...) by exp2f()

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c5f0b6bf410ca9921cf61627ed1cba38d09b0725
---

 libavcodec/atrac3.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c
index 0912043..7d076be 100644
--- a/libavcodec/atrac3.c
+++ b/libavcodec/atrac3.c
@@ -37,6 +37,7 @@
 #include <stdio.h>
 
 #include "libavutil/float_dsp.h"
+#include "libavutil/libm.h"
 #include "avcodec.h"
 #include "get_bits.h"
 #include "bytestream.h"
@@ -1020,10 +1021,10 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
 
     /* Generate gain tables. */
     for (i=0 ; i<16 ; i++)
-        gain_tab1[i] = powf (2.0, (4 - i));
+        gain_tab1[i] = exp2f (4 - i);
 
     for (i=-15 ; i<16 ; i++)
-        gain_tab2[i+15] = powf (2.0, i * -0.125);
+        gain_tab2[i+15] = exp2f (i * -0.125);
 
     /* init the joint-stereo decoding data */
     q->weighting_delay[0] = 0;