Unpack file header parameters into a list.
Reads the 32-byte file header from file and unpacks into a list. Endiness is corrected as needed.
Returned list contents:
| N | Variable | Description |
|---|---|---|
| 0 | nblocks | data blocks in file |
| 1 | ntraces | traces per block |
| 2 | np | elements per trace |
| 3 | ebytes | bytes per element |
| 4 | tbytes | bytes per trace |
| 5 | bbytes | bytes per block |
| 6 | vers_id | software version, file_id status bits |
| 7 | status | status of whole file |
| 8 | nbheaders | number of block headers per block (1) |