Edit
kc3-lang/brotli/common/constants.h
Eugene Kliuchnikov
- common/constants.h
-
/* Copyright 2016 Google Inc. All Rights Reserved. Distributed under MIT license. See file LICENSE for detail or copy at https://opensource.org/licenses/MIT */ #ifndef BROTLI_COMMON_CONSTANTS_H_ #define BROTLI_COMMON_CONSTANTS_H_ /* Specification: 7.3. Encoding of the context map */ #define BROTLI_CONTEXT_MAP_MAX_RLE 16 /* Specification: 2. Compressed representation overview */ #define BROTLI_MAX_NUMBER_OF_BLOCK_TYPES 256 /* Specification: 3.3. Alphabet sizes: insert-and-copy length */ #define BROTLI_NUM_LITERAL_SYMBOLS 256 #define BROTLI_NUM_COMMAND_SYMBOLS 704 #define BROTLI_NUM_BLOCK_LEN_SYMBOLS 26 #define BROTLI_MAX_CONTEXT_MAP_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + \ BROTLI_CONTEXT_MAP_MAX_RLE) #define BROTLI_MAX_BLOCK_TYPE_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + 2) /* Specification: 3.5. Complex prefix codes */ #define BROTLI_REPEAT_PREVIOUS_CODE_LENGTH 16 #define BROTLI_REPEAT_ZERO_CODE_LENGTH 17 #define BROTLI_CODE_LENGTH_CODES (BROTLI_REPEAT_ZERO_CODE_LENGTH + 1) /* "code length of 8 is repeated" */ #define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8 /* Specification: 4. Encoding of distances */ #define BROTLI_NUM_DISTANCE_SHORT_CODES 16 #define BROTLI_MAX_NPOSTFIX 3 #define BROTLI_MAX_NDIRECT 120 /* BROTLI_NUM_DISTANCE_SYMBOLS == 520 */ #define BROTLI_NUM_DISTANCE_SYMBOLS (BROTLI_NUM_DISTANCE_SHORT_CODES + \ BROTLI_MAX_NDIRECT + \ (24 << (BROTLI_MAX_NPOSTFIX + 1))) /* 7.1. Context modes and context ID lookup for literals */ /* "context IDs for literals are in the range of 0..63" */ #define BROTLI_LITERAL_CONTEXT_BITS 6 /* 7.2. Context ID for distances */ #define BROTLI_DISTANCE_CONTEXT_BITS 2 #endif /* BROTLI_COMMON_CONSTANTS_H_ */