synwtfilterfloat.java

jpeg2000编解码

/*
 * CVS identifier:
 *
 * $Id: SynWTFilterFloat.java,v 1.1.1.1 2002/07/22 09:26:55 grosbois Exp $
 *
 * Class:                   SynWTFilterFloat
 *
 * Description:             A specialized synthesis wavelet filter interface
 *                          that works on float data.
 *
 *
 *
 * COPYRIGHT:
 * 
 * This software module was originally developed by Rapha雔 Grosbois and
 * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
 * Askel鰂 (Ericsson Radio Systems AB); and Bertrand Berthelot, David
 * Bouchard, F閘ix 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;
    }

}