blosc2.Filter¶

class blosc2.Filter(*values)[source]¶

Available filters. For each of the filters, the integer value passed to filters_meta has the following meaning:

NOFILTER: Not used
SHUFFLE: Number of byte streams for shuffle (if 0 defaults to typesize of array).
BITSHUFFLE: Not used
DELTA: Not used (bitwise XOR)
TRUNC_PREC: Number of bits to which to truncate float
NDCELL: Cellshape (i.e. for a 3-dim dataset, meta = 4 implies cellshape is 4x4x4)
NDMEAN: Cellshape (i.e. for a 3-dim dataset, meta = 4 implies cellshape is 4x4x4)
BYTEDELTA: Number of byte streams for delta
INT_TRUNC: Number of bits to which to truncate integer

For TRUNC_PREC and INT_TRUNC, positive values specify number of bits to keep; negative values specify number of bits to zero.

For NDCELL/NDMEAN see this explanation for NDCELL and this for NDMEAN.

Attributes