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.

Empieza leyendo el manejo de rdsamp para physical==0 y physical==1, incluidos los canales multisegmento vacíos con stacksegments==1. Compara el comportamiento del paquete con las convenciones de muestras no válidas del paquete C original de WFDB. La tarea estará terminada cuando el manejo previsto de -2^31, 2^(fmt-1) y las muestras de formato no mapeado esté claramente documentado o resuelto.