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lossless bitstream: block size bits correction

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The prediction block size is stored as 3 bits, not 4.
Fixed the description. The code snippet is already correct.

Change-Id: Iaa66a7e9817b58a2557c9a71c2231cc400b6ae4d
This commit is contained in:
Pascal Massimino 2012-12-05 00:01:28 -08:00
parent d65ec6786a
commit e4fc4c1c63
1 changed files with 1 additions and 1 deletions
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doc/webp-lossless-bitstream-spec.txt
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@ -236,7 +236,7 @@ predicted) is encoded. The _prediction mode_ determines the type of
prediction to use. We divide the image into squares and all the pixels
in a square use same prediction mode.
The first 4 bits of prediction data define the block width and height in
The first 3 bits of prediction data define the block width and height in
number of bits. The number of block columns, `block_xsize`, is used in
indexing two-dimensionally.