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Change k limiting code, i think the code was buggy.

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If you have ALAC files TEST them! Mine produce the same md5 but the new
code is not identical if limiting does happen.

Originally committed as revision 12872 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-04-17 03:00:08 +00:00
parent 59b377ac86
commit c49c5e23dc
1 changed files with 7 additions and 5 deletions
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12
libavcodec/alac.c
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@ -226,18 +226,20 @@ static void bastardized_rice_decompress(ALACContext *alac,
k = count_leading_zeros(history) + ((history + 16) >> 6 /* / 64 */) - 24;
if (k >= rice_kmodifier)
k = rice_kmodifier;
x = (x << k) - x;
extrabits = show_bits(&alac->gb, k);
block_size = (((1 << k) - 1) & rice_kmodifier_mask) * x
+ extrabits - 1;
if (extrabits < 2) {
x = 1 - extrabits;
block_size += x;
skip_bits(&alac->gb, k - 1);
} else {
x += extrabits - 1;
skip_bits(&alac->gb, k);
}
block_size = x;
}
if (block_size > 0) {