public Propogation CurrentPropogation(string countryFixedName, RadioInfo.BandName band)
{
int hn = DateTime.UtcNow.Hour;
int hf = hn == 24 ? 0 : hn + 1;
try
{
Propogation psn = GetPropogationRel(countryFixedName, band, "S", hn); //psn = Prop Short Now
Propogation pln = GetPropogationRel(countryFixedName, band, "L", hn);
Propogation psf = GetPropogationRel(countryFixedName, band, "S", hf);
Propogation plf = GetPropogationRel(countryFixedName, band, "L", hf);
if (psn.Rel >= pln.Rel)
{
return(InterpolatePropogation(psn, psf));
}
else
{
return(InterpolatePropogation(pln, plf));
}
}
catch (Exception)
{
return(new Propogation(countryFixedName, 0, "S", -1, band));
//Dont rethrow, just return the negative REL.
}
}
/// <summary>
/// Linear interpolation between propogations.
/// </summary>
/// <param name="pn"></param>
/// <param name="pf"></param>
/// <returns></returns>
private Propogation InterpolatePropogation(Propogation pn, Propogation pf)
{
float hfract = (float)DateTime.UtcNow.Minute / 60;
float newrel = pn.Rel + ((pf.Rel - pn.Rel) * hfract);
return(new Propogation(pn.Country, pn.Hour + hfract, pn.Path, newrel, pn.Band));
}