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Simplify predictor updates

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27152 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2008-06-29 09:10:46 +00:00
parent 8532066166
commit 9f941c8a00
1 changed files with 3 additions and 9 deletions
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12
libmpcodecs/ad_imaadpcm.c
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@ -150,16 +150,10 @@ static void decode_nibbles(unsigned short *output,
sign = delta & 8;
delta = delta & 7;
delta = 2 * delta + 1;
if (sign) delta = -delta;
diff = step[channel_number] >> 3;
if (delta & 4) diff += step[channel_number];
if (delta & 2) diff += step[channel_number] >> 1;
if (delta & 1) diff += step[channel_number] >> 2;
if (sign)
predictor[channel_number] -= diff;
else
predictor[channel_number] += diff;
predictor[channel_number] += (delta * step[channel_number]) >> 3;
CLAMP_S16(predictor[channel_number]);
output[i] = predictor[channel_number];