static DFMFilter()
{
DFMCoefList upper1 = new DFMCoefList(1, 0);
DFMCoefList upper2 = new DFMCoefList(2);
DFMCoefList upper3 = new DFMCoefList(0, 1);
DFMCoefList upper4 = new DFMCoefList(0.5, 0.5);
DFMCoefList lower1 = new DFMCoefList(1, 0);
DFMCoefList lower2 = new DFMCoefList(1, -0.5);
identityFilter = new DFMFilter(upper1, lower1);
doublingFilter = new DFMFilter(upper2, lower1);
delayFilter = new DFMFilter(upper3, lower1);
fadeFilter = new DFMFilter(upper1, lower2);
avg2Filter = new DFMFilter(upper4, lower1, "Average2");
}
DFMFilter LoadFilterFromFile(string path)
{
string[] lines = File.ReadAllLines(path);
if (!lines[0].ToLower().StartsWith("filter "))
{
throw new FileFormatException("File is not formatted as a filter file");
}
string[] namelines = lines[0].Split(' ');
string name = namelines[1];
string[] uppernums = lines[1].Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
DFMCoefList upper = new DFMCoefList(uppernums.Select(x => double.Parse(x)).ToArray());
string[] lowernums = lines[2].Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
DFMCoefList lower = new DFMCoefList(lowernums.Select(x => double.Parse(x)).ToArray());
if (lower[0] == 0)
{
throw new ArgumentException("First denominator coefficient can't be 0");
}
DFMFilter filter = new DFMFilter(upper, lower, name);
return(filter);
}
public DFMFilter(DFMCoefList upper, DFMCoefList lower, string name = null)
{
Name = name == null ? "Unnamed filter" : name;
this.upper = upper;
this.lower = lower;
}
