Original WFDB C package notes and nuances

WFDB Invalid sample limitation

Currently the wfdb library does not account for >16bit formats and hence uses the value -32768 as nan.

For this python package for rdsamp physical==0, I have currently decided to set empty multi-segment channels (with stacksegments==1) to -2^31. We can revise this later if needed and see what happens with the next version of the wfdb library. In addition, all format samples will be stored (with physical==0) as they are with no mapping.

For rdsamp for option physical==1, 2^(fmt-1) will be interpreted as nans.

Inizia leggendo la gestione di rdsamp per physical==0 e physical==1, inclusi i canali multisegmento vuoti con stacksegments==1. Confronta il comportamento del package con le convenzioni del package C originale di WFDB per i campioni non validi. Il lavoro è completato quando la gestione prevista di -2^31, 2^(fmt-1) e dei campioni con formato non mappato è chiaramente documentata o risolta.