Hi,
I'm working on a compression filter for HDF5, but I had some problems with
jhdf5 opening the filtered datasets.
I managed to trace down the problem to this: the filter plugin is found,
starts execution, but when it wants to free the original buffer, the
program exits with a memory heap corruption error. This is a minimal
version of the filter that reproduces the error:
size_t H5Z_dummy_filter(unsigned int flags, size_t cd_nelmts, const
unsigned int cd_values[], size_t nbytes, size_t *buf_size, void **buf)
{
int* outbuf = (int*)malloc(*buf_size);
memcpy(outbuf, *buf, *buf_size);
free(*buf); // error occurs here
*buf = outbuf;
return nbytes;
}
This (dummy) filter works from C++, from the command line with h5dump, and
also with HDFView. I only had a problem when using it with Fiji, which uses
the jhdf5 library (14.12.2).
I compiled the dll with Visual Studio 2013 on Windows 7 64 bit, and use the
64 bit version of Java 8 with Fiji.
Thanks in advance for the help!
Cheers,
Balint
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