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java.lang.Objectmath.jtransforms.dct.FloatDCT_1D
public class FloatDCT_1D
Computes 1D Discrete Cosine Transform (DCT) of single precision data. The size
of data can be an arbitrary number. This is a parallel implementation of
split-radix and mixed-radix algorithms optimized for SMP systems.
Part of the code is derived from General Purpose FFT Package written by Takuya Ooura
(http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html)
Constructor Summary | |
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FloatDCT_1D(int n)
Creates new instance of FloatDCT_1D. |
Method Summary | |
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void |
forward(float[] a,
boolean scale)
Computes 1D forward DCT (DCT-II) leaving the result in a . |
void |
forward(float[] a,
int offa,
boolean scale)
Computes 1D forward DCT (DCT-II) leaving the result in a . |
void |
inverse(float[] a,
boolean scale)
Computes 1D inverse DCT (DCT-III) leaving the result in a . |
void |
inverse(float[] a,
int offa,
boolean scale)
Computes 1D inverse DCT (DCT-III) leaving the result in a . |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FloatDCT_1D(int n)
n
- size of dataMethod Detail |
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public void forward(float[] a, boolean scale)
a
.
a
- data to transformscale
- if true then scaling is performedpublic void forward(float[] a, int offa, boolean scale)
a
.
a
- data to transformoffa
- index of the first element in array a
scale
- if true then scaling is performedpublic void inverse(float[] a, boolean scale)
a
.
a
- data to transformscale
- if true then scaling is performedpublic void inverse(float[] a, int offa, boolean scale)
a
.
a
- data to transformoffa
- index of the first element in array a
scale
- if true then scaling is performed
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