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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-10 22:32:56 +02:00
parent 14de55784d
commit c5f0b6bf41
1 changed files with 3 additions and 2 deletions
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5
libavcodec/atrac3.c
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@ -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;