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Add a comment on shift vs. division
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27259 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -171,6 +171,9 @@ static int ms_adpcm_decode_block(unsigned short *output, unsigned char *input,
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upper_nibble ^= 1;
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SE_4BIT(snibble);
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// should this really be a division and not a shift?
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// coefficients were originally scaled by for, which might have
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// been an optimization for 8-bit CPUs _if_ a shift is correct
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predictor = (
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((sample1[current_channel] * coeff1[current_channel]) +
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(sample2[current_channel] * coeff2[current_channel])) / 64) +
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