Blosc2 (32026) is out of reach for now: hdf5plugin's Blosc2 filter stores
each HDF5 chunk as a Blosc2 super-chunk frame (msgpack header, a compressed
chunk-offset index, trailer metalayers) and, for 2-D and larger chunks, as
a B2ND array whose n-D blocks have to be reassembled - on top of the Blosc2
chunk format itself (extended header, filter pipeline, special-value
chunks). ZFP (32013) is out of scope. Both keep failing with
UnsupportedFilter, and the message now says what the ID is:
"unsupported filter: 32026 (Blosc2, not implemented by clawhdf5)", or,
for a filter this build left out, "... (Blosc; this build lacks the
`blosc` feature)". filter_registry::known_filter exposes the table.
tests/plugin_filters_interop.rs: hdf5plugin's Blosc2 and ZFP datasets
read as an error naming the filter, never as data.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
