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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 prediction to use. We divide the image into squares and all the pixels
in a square use same prediction mode. 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 number of bits. The number of block columns, `block_xsize`, is used in
indexing two-dimensionally. indexing two-dimensionally.