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simpler 

Originally committed as revision 2310 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-09-28 20:27:56 +00:00
parent 6eb23b82c2
commit cd1f22f97e
1 changed files with 4 additions and 12 deletions
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16
libavcodec/pcm.c
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@ -45,19 +45,11 @@ static int alaw2linear(unsigned char a_val)
a_val ^= 0x55;
t = (a_val & QUANT_MASK) << 4;
t = a_val & QUANT_MASK;
seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
switch (seg) {
case 0:
t += 8;
break;
case 1:
t += 0x108;
break;
default:
t += 0x108;
t <<= seg - 1;
}
if(seg) t= (t + t + 1 + 32) << (seg + 2);
else t= (t + t + 1 ) << 3;
return ((a_val & SIGN_BIT) ? t : -t);
}