constants.h - Online Linux Manual PageSection : 3
Updated : Wed May 13 2020
Source : Brotli

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NAMEconstants.h − Common constants used in decoder and encoder API​.

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SYNOPSIS

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Macros#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U
The theoretical maximum number of distance bits specified for large window brotli, for 64-bit encoders and decoders​. #define BROTLI_LARGE_MAX_WBITS 30
The maximum supported large brotli window bits by the encoder and decoder​. #define BROTLI_MAX_NPOSTFIX 3
Maximal number of 'postfix' bits​.

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Detailed DescriptionCommon constants used in decoder and encoder API​.

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Macro Definition Documentation

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#define BROTLI_LARGE_MAX_DISTANCE_BITS 62UThe theoretical maximum number of distance bits specified for large window brotli, for 64-bit encoders and decoders​. Even when in practice 32-bit encoders and decoders only support up to 30 max distance bits, the value is set to 62 because it affects the large window brotli file format​. Specifically, it affects the encoding of simple huffman tree for distances, see Specification RFC 7932 chapter 3​.4​.

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#define BROTLI_LARGE_MAX_WBITS 30The maximum supported large brotli window bits by the encoder and decoder​. Large window brotli allows up to 62 bits, however the current encoder and decoder, designed for 32-bit integers, only support up to 30 bits maximum​.

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#define BROTLI_MAX_NPOSTFIX 3Maximal number of 'postfix' bits​. Number of 'postfix' bits is stored as 2 bits in meta-block header​.

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AuthorGenerated automatically by Doxygen for Brotli from the source code​. 0

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Johanes Gumabo

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