Class DoubleDST_1D


  • public class DoubleDST_1D
    extends java.lang.Object
    Computes 1D Discrete Sine Transform (DST) of double precision data. The size of data can be an arbitrary number. It uses DCT algorithm. This is a parallel implementation optimized for SMP systems.
    Author:
    Piotr Wendykier (piotr.wendykier@gmail.com)
    • Constructor Summary

      Constructors 
      Constructor Description
      DoubleDST_1D​(int n)
      Creates new instance of DoubleDST_1D.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void forward​(double[] a, boolean scale)
      Computes 1D forward DST (DST-II) leaving the result in a.
      void forward​(double[] a, int offa, boolean scale)
      Computes 1D forward DST (DST-II) leaving the result in a.
      void inverse​(double[] a, boolean scale)
      Computes 1D inverse DST (DST-III) leaving the result in a.
      void inverse​(double[] a, int offa, boolean scale)
      Computes 1D inverse DST (DST-III) leaving the result in a.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • DoubleDST_1D

        public DoubleDST_1D​(int n)
        Creates new instance of DoubleDST_1D.
        Parameters:
        n - size of data
    • Method Detail

      • forward

        public void forward​(double[] a,
                            boolean scale)
        Computes 1D forward DST (DST-II) leaving the result in a.
        Parameters:
        a - data to transform
        scale - if true then scaling is performed
      • forward

        public void forward​(double[] a,
                            int offa,
                            boolean scale)
        Computes 1D forward DST (DST-II) leaving the result in a.
        Parameters:
        a - data to transform
        offa - index of the first element in array a
        scale - if true then scaling is performed
      • inverse

        public void inverse​(double[] a,
                            boolean scale)
        Computes 1D inverse DST (DST-III) leaving the result in a.
        Parameters:
        a - data to transform
        scale - if true then scaling is performed
      • inverse

        public void inverse​(double[] a,
                            int offa,
                            boolean scale)
        Computes 1D inverse DST (DST-III) leaving the result in a.
        Parameters:
        a - data to transform
        offa - index of the first element in array a
        scale - if true then scaling is performed