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/*
* $RCSfile: SynWTFilterFloat.java,v $
* $Revision: 1.1 $
* $Date: 2005/02/11 05:02:34 $
* $State: Exp $
*
* Class: SynWTFilterFloat
*
* Description: A specialized synthesis wavelet filter interface
* that works on float data.
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
*
* Copyright (c) 1999/2000 JJ2000 Partners.
*
*
*
*/
package jj2000.j2k.wavelet.synthesis;
import jj2000.j2k.wavelet.*;
import jj2000.j2k.image.*;
/**
* This extends the synthesis wavelet filter general definitions of
* SynWTFilter by adding methods that work for float data
* specifically. Implementations that work on float data should inherit
* from this class.
*
* <P>See the SynWTFilter class for details such as
* normalization, how to split odd-length signals, etc.
*
* <P>The advantage of using the specialized method is that no casts
* are performed.
*
* @see SynWTFilter
* */
public abstract class SynWTFilterFloat extends SynWTFilter {
/**
* A specific version of the synthetize_lpf() method that works on float
* data. See the general description of the synthetize_lpf() method in the
* SynWTFilter class for more details.
*
* @param lowSig This is the array that contains the low-pass
* input signal.
*
* @param lowOff This is the index in lowSig of the first sample to
* filter.
*
* @param lowLen This is the number of samples in the low-pass
* input signal to filter.
*
* @param lowStep This is the step, or interleave factor, of the
* low-pass input signal samples in the lowSig array.
*
* @param highSig This is the array that contains the high-pass
* input signal.
*
* @param highOff This is the index in highSig of the first sample to
* filter.
*
* @param highLen This is the number of samples in the high-pass
* input signal to filter.
*
* @param highStep This is the step, or interleave factor, of the
* high-pass input signal samples in the highSig array.
*
* @param outSig This is the array where the output signal is
* placed. It should be long enough to contain the output signal.
*
* @param outOff This is the index in outSig of the element where
* to put the first output sample.
*
* @param outStep This is the step, or interleave factor, of the
* output samples in the outSig array.
*
* @see SynWTFilter#synthetize_lpf
*
*
*
*
* */
public abstract
void synthetize_lpf(float[] lowSig, int lowOff, int lowLen, int lowStep,
float[] highSig, int highOff, int highLen, int highStep,
float[] outSig, int outOff, int outStep);
/**
* The general version of the synthetize_lpf() method, it just calls
* the specialized version. See the description of the synthetize_lpf()
* method of the SynWTFilter class for more details.
*
* @param lowSig This is the array that contains the low-pass
* input signal. It must be an float[].
*
* @param lowOff This is the index in lowSig of the first sample to
* filter.
*
* @param lowLen This is the number of samples in the low-pass
* input signal to filter.
*
* @param lowStep This is the step, or interleave factor, of the
* low-pass input signal samples in the lowSig array.
*
* @param highSig This is the array that contains the high-pass
* input signal. It must be an float[].
*
* @param highOff This is the index in highSig of the first sample to
* filter.
*
* @param highLen This is the number of samples in the high-pass
* input signal to filter.
*
* @param highStep This is the step, or interleave factor, of the
* high-pass input signal samples in the highSig array.
*
* @param outSig This is the array where the output signal is
* placed. It should be and float[] and long enough to contain the
* output signal.
*
* @param outOff This is the index in outSig of the element where
* to put the first output sample.
*
* @param outStep This is the step, or interleave factor, of the
* output samples in the outSig array.
*
* @see SynWTFilter#synthetize_hpf
*
*
*
*
* */
public
void synthetize_lpf(Object lowSig, int lowOff, int lowLen, int lowStep,
Object highSig, int highOff, int highLen, int highStep,
Object outSig, int outOff, int outStep) {
synthetize_lpf((float[])lowSig, lowOff, lowLen, lowStep,
(float[])highSig, highOff, highLen, highStep,
(float[])outSig, outOff, outStep);
}
/**
* A specific version of the synthetize_hpf() method that works on float
* data. See the general description of the synthetize_hpf() method in the
* SynWTFilter class for more details.
*
* @param lowSig This is the array that contains the low-pass
* input signal.
*
* @param lowOff This is the index in lowSig of the first sample to
* filter.
*
* @param lowLen This is the number of samples in the low-pass
* input signal to filter.
*
* @param lowStep This is the step, or interleave factor, of the
* low-pass input signal samples in the lowSig array.
*
* @param highSig This is the array that contains the high-pass
* input signal.
*
* @param highOff This is the index in highSig of the first sample to
* filter.
*
* @param highLen This is the number of samples in the high-pass
* input signal to filter.
*
* @param highStep This is the step, or interleave factor, of the
* high-pass input signal samples in the highSig array.
*
* @param outSig This is the array where the output signal is
* placed. It should be long enough to contain the output signal.
*
* @param outOff This is the index in outSig of the element where
* to put the first output sample.
*
* @param outStep This is the step, or interleave factor, of the
* output samples in the outSig array.
*
* @see SynWTFilter#synthetize_hpf
*
*
*
*
* */
public abstract
void synthetize_hpf(float[] lowSig, int lowOff, int lowLen, int lowStep,
float[] highSig, int highOff, int highLen, int highStep,
float[] outSig, int outOff, int outStep);
/**
* The general version of the synthetize_hpf() method, it just calls
* the specialized version. See the description of the synthetize_hpf()
* method of the SynWTFilter class for more details.
*
* @param lowSig This is the array that contains the low-pass
* input signal. It must be an float[].
*
* @param lowOff This is the index in lowSig of the first sample to
* filter.
*
* @param lowLen This is the number of samples in the low-pass
* input signal to filter.
*
* @param lowStep This is the step, or interleave factor, of the
* low-pass input signal samples in the lowSig array.
*
* @param highSig This is the array that contains the high-pass
* input signal. It must be an float[].
*
* @param highOff This is the index in highSig of the first sample to
* filter.
*
* @param highLen This is the number of samples in the high-pass
* input signal to filter.
*
* @param highStep This is the step, or interleave factor, of the
* high-pass input signal samples in the highSig array.
*
* @param outSig This is the array where the output signal is
* placed. It should be and float[] and long enough to contain the
* output signal.
*
* @param outOff This is the index in outSig of the element where
* to put the first output sample.
*
* @param outStep This is the step, or interleave factor, of the
* output samples in the outSig array.
*
* @see SynWTFilter#synthetize_hpf
*
*
*
*
* */
public
void synthetize_hpf(Object lowSig, int lowOff, int lowLen, int lowStep,
Object highSig, int highOff, int highLen, int highStep,
Object outSig, int outOff, int outStep) {
synthetize_hpf((float[])lowSig, lowOff, lowLen, lowStep,
(float[])highSig, highOff, highLen, highStep,
(float[])outSig, outOff, outStep);
}
/**
* Returns the type of data on which this filter works, as defined
* in the DataBlk interface, which is always TYPE_FLOAT for this
* class.
*
* @return The type of data as defined in the DataBlk interface.
*
* @see jj2000.j2k.image.DataBlk
*
*
* */
public int getDataType() {
return DataBlk.TYPE_FLOAT;
}
}