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mpegaudiodec: replace pow(2.0,...) by exp2()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Michael Niedermayer 2012-09-10 22:34:18 +02:00
parent c5f0b6bf41
commit 76fac07334
1 changed files with 2 additions and 1 deletions
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libavcodec/mpegaudiodec.c
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@ -26,6 +26,7 @@
#include "libavutil/audioconvert.h"
#include "libavutil/avassert.h"
#include "libavutil/libm.h"
#include "avcodec.h"
#include "get_bits.h"
#include "mathops.h"
@ -394,7 +395,7 @@ static av_cold void decode_init_static(void)
for (j = 0; j < 2; j++) {
e = -(j + 1) * ((i + 1) >> 1);
f = pow(2.0, e / 4.0);
f = exp2(e / 4.0);
k = i & 1;
is_table_lsf[j][k ^ 1][i] = FIXR(f);
is_table_lsf[j][k ][i] = FIXR(1.0);