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Partially revert r20233, exp2f is not available on some BSDs, DOS and AVR32.

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Originally committed as revision 20240 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-10-15 17:10:07 +00:00
parent e8b785411e
commit a57afd2943
1 changed files with 2 additions and 2 deletions
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4
libavcodec/mpegaudiodec.c
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@ -411,7 +411,7 @@ static av_cold int decode_init(AVCodecContext * avctx)
double value = i/4;
double f, fm;
int e, m;
f = value * cbrtf(value) * exp2f((i&3)*0.25);
f = value * cbrtf(value) * pow(2, (i&3)*0.25);
fm = frexp(f, &e);
m = (uint32_t)(fm*(1LL<<31) + 0.5);
e+= FRAC_BITS - 31 + 5 - 100;
@ -423,7 +423,7 @@ static av_cold int decode_init(AVCodecContext * avctx)
for(i=0; i<512*16; i++){
double value = i & 15;
int exponent= (i>>4);
double f= value * cbrtf(value) * exp2f((exponent-400)*0.25 + FRAC_BITS + 5);
double f= value * cbrtf(value) * pow(2, (exponent-400)*0.25 + FRAC_BITS + 5);
expval_table[exponent][i&15]= llrint(f);
if((i&15)==1)
exp_table[exponent]= llrint(f);