Allow std. gzip filter to decompress data of gzip-compatible (zopfli) filter


yesterday I heard about Google's zopfli compression library which produces
zlib (gzip) compatible output. Meaning you can compress with zopfli and
decompress with zlib. I saw a chance here to create smaller HDF5 files
without requiring a special filter on the reader's side.

Now my question is: How can I use my own filter to compress blocks and let
other HDF5 applications think that they were compressed by

Currently I have a filter that uses zopfli for compression and zlib for
decompression. In fact the decompression stage was copied from the standard
GZIP filter.

My implementation of the filter can be found here:

Best regards,


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