Utility variables

This are enum values which avoid the nuisance of remembering codes and IDs.

Limits for different features

enumerator BLOSC_MIN_HEADER_LENGTH

Minimum header length (Blosc1)

enumerator BLOSC_EXTENDED_HEADER_LENGTH

Extended header length (Blosc2, see README_HEADER)

enumerator BLOSC2_MAX_OVERHEAD

The maximum overhead during compression in bytes.

This equals to BLOSC_EXTENDED_HEADER_LENGTH now, but can be higher in future implementations.

enumerator BLOSC_MIN_BUFFERSIZE

Minimum buffer size to be compressed.

enumerator BLOSC2_MAX_BUFFERSIZE

Maximum source buffer size to be compressed.

enumerator BLOSC_MAX_TYPESIZE

Maximum typesize before considering source buffer as a stream of bytes.

Cannot be larger than 255.

enumerator BLOSC2_MAX_FILTERS

Maximum number of filters in the filter pipeline.

Codes for filters

enumerator BLOSC_NOSHUFFLE

No shuffle (for compatibility with Blosc1).

enumerator BLOSC_NOFILTER

No filter.

enumerator BLOSC_SHUFFLE

Byte-wise shuffle.

enumerator BLOSC_BITSHUFFLE

Bit-wise shuffle.

enumerator BLOSC_DELTA

Delta filter.

enumerator BLOSC_TRUNC_PREC

Truncate mantissa precision; positive values in cparams.filters_meta will keep bits; negative values will reduce bits.

Compressor codecs

enumerator BLOSC_BLOSCLZ

enumerator BLOSC_LZ4

enumerator BLOSC_LZ4HC

enumerator BLOSC_ZLIB

enumerator BLOSC_ZSTD

Compressor names

BLOSC_BLOSCLZ_COMPNAME "blosclz"

BLOSC_LZ4_COMPNAME "lz4"

BLOSC_LZ4HC_COMPNAME "lz4hc"

BLOSC_ZLIB_COMPNAME "zlib"

BLOSC_ZSTD_COMPNAME "zstd"

Internal flags (blosc1_cbuffer_metainfo)

enumerator BLOSC_DOSHUFFLE

byte-wise shuffle

enumerator BLOSC_MEMCPYED

plain copy

enumerator BLOSC_DOBITSHUFFLE

bit-wise shuffle

enumerator BLOSC_DODELTA

delta coding