diff options
Diffstat (limited to 'c/common/constants.h')
| -rw-r--r-- | c/common/constants.h | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/c/common/constants.h b/c/common/constants.h index 416ec55..26edcd5 100644 --- a/c/common/constants.h +++ b/c/common/constants.h @@ -28,18 +28,25 @@ /* "code length of 8 is repeated" */ #define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8 +/* "Large Window Brotli" */ +#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U +#define BROTLI_LARGE_MIN_WBITS 10 +#define BROTLI_LARGE_MAX_WBITS 30 + /* Specification: 4. Encoding of distances */ #define BROTLI_NUM_DISTANCE_SHORT_CODES 16 #define BROTLI_MAX_NPOSTFIX 3 #define BROTLI_MAX_NDIRECT 120 #define BROTLI_MAX_DISTANCE_BITS 24U -/* BROTLI_NUM_DISTANCE_SYMBOLS == 520 */ -#define BROTLI_NUM_DISTANCE_SYMBOLS (BROTLI_NUM_DISTANCE_SHORT_CODES + \ - BROTLI_MAX_NDIRECT + \ - (BROTLI_MAX_DISTANCE_BITS << \ - (BROTLI_MAX_NPOSTFIX + 1))) -/* Distance that is guaranteed to be representable in any stream. */ +#define BROTLI_DISTANCE_ALPHABET_SIZE(NDIRECT, NPOSTFIX, MAXNBITS) ( \ + BROTLI_NUM_DISTANCE_SHORT_CODES + (NDIRECT) + \ + ((MAXNBITS) << ((NPOSTFIX) + 1))) +/* BROTLI_NUM_DISTANCE_SYMBOLS == 1128 */ +#define BROTLI_NUM_DISTANCE_SYMBOLS \ + BROTLI_DISTANCE_ALPHABET_SIZE( \ + BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS) #define BROTLI_MAX_DISTANCE 0x3FFFFFC +#define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC /* 7.1. Context modes and context ID lookup for literals */ /* "context IDs for literals are in the range of 0..63" */ |