public bool Decode(int[] received, int twoS)
{
var poly = new GenericGfPoly(field, received);
var syndromeCoefficients = new int[twoS];
var noError = true;
for (var i = 0; i < twoS; i++)
{
var eval = poly.EvaluateAt(field.Exp(i + field.GeneratorBase));
syndromeCoefficients[syndromeCoefficients.Length - 1 - i] = eval;
if (eval != 0)
{
noError = false;
}
}
if (noError)
{
return(true);
}
var syndrome = new GenericGfPoly(field, syndromeCoefficients);
var sigmaOmega = RunEuclideanAlgorithm(field.BuildMonomial(twoS, 1), syndrome, twoS);
if (sigmaOmega == null)
{
return(false);
}
var sigma = sigmaOmega[0];
var errorLocations = FindErrorLocations(sigma);
if (errorLocations == null)
{
return(false);
}
var omega = sigmaOmega[1];
var errorMagnitudes = FindErrorMagnitudes(omega, errorLocations);
for (var i = 0; i < errorLocations.Length; i++)
{
var position = received.Length - 1 - field.Log(errorLocations[i]);
if (position < 0)
{
return(false);
}
received[position] = GenericGf.AddOrSubtract(received[position], errorMagnitudes[i]);
}
return(true);
}
public ReedSolomonDecoder(GenericGf field)
{
this.field = field;
}
