/// <summary>Initializes a new instance of the <see cref="OneDimFractionalFourierTransformation"/> class.
/// </summary>
/// <param name="alpha">The parameter \alpha of the Fractional Fast Fourier Transformation.</param>
/// <param name="oneDimFourierTransformationFactory">The one-dimensional Fourier transformation factory.</param>
/// <param name="length">The length, i.e. the number of (complex) Fourier coefficients.</param>
internal OneDimFractionalFourierTransformation(int length, Complex alpha, IOneDimFourierTransformationFactory oneDimFourierTransformationFactory)
{
if (length <= 0)
{
throw new ArgumentException(String.Format(ExceptionMessages.ArgumentOutOfRangeGreater, "Length <" + length + ">", 0));
}
m_Length = length;
m_ForwardPreFactor = new Complex[length];
m_BackwardPreFactor = new Complex[length];
int n = 2 * length;
m_FourierTransformation = oneDimFourierTransformationFactory.Create(n);
m_ForwardTransformedVectorZ = new Complex[n];
m_BackwardTransformedVectorZ = new Complex[n];
SetParameterAlpha(alpha);
}
/// <summary>Initializes a new instance of the <see cref="OneDimFourierTransformationFactory"/> class.
/// </summary>
/// <param name="fourierTransformationFactory">The (Fast) Fourier Transformation factory.</param>
internal OneDimFourierTransformationFactory(IOneDimFourierTransformationFactory fourierTransformationFactory)
{
Real = new RealFactory(fourierTransformationFactory);
m_Factory = fourierTransformationFactory;
}
/// <summary>Initializes a new instance of the <see cref="RealFactory"/> class.
/// </summary>
/// <param name="fourierTransformationFactory">The (Fast) Fourier Transformation factory.</param>
internal RealFactory(IOneDimFourierTransformationFactory fourierTransformationFactory)
{
m_Factory = fourierTransformationFactory;
}
/// <summary>Initializes a new instance of the <see cref="MklFFTNativeWrapper" /> class.
/// </summary>
public MklFFTNativeWrapper()
{
m_Name = new IdentifierString("MKL");
m_OneDimensionalFactory = new MklOneDimFourierTransformationFactory();
}
/// <summary>Initializes a new instance of the <see cref="FftwNativeWrapper" /> class.
/// </summary>
public FftwNativeWrapper()
{
m_Name = new IdentifierString("FFTW 3.3.x");
m_OneDimensionalFactory = new FftwOneDimFourierTransformationFactory();
}
