/*  * CVS identifier: *  * $Id: ForwWT.java,v 1.1.1.1 2002/07/22 09:26:54 grosbois Exp $ *  * Class:                   ForwWT *  * Description:             The interface for implementations of a forward *                          wavelet transform. *  *  *  * 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.analysis;import jj2000.j2k.wavelet.*;/** * This interface extends the WaveletTransform with the specifics of forward * wavelet transforms. Classes that implement forward wavelet transfoms should * implement this interface. * * <p>This class does not define the methods to transfer data, just the * specifics to forward wavelet transform. Different data transfer methods are  * evisageable for different transforms.</p> * */public interface ForwWT extends WaveletTransform, ForwWTDataProps {    /**     * Returns the horizontal analysis wavelet filters used in each level, for     * the specified tile-component. The first element in the array is the     * filter used to obtain the lowest resolution (resolution level 0)     * subbands (i.e. lowest frequency LL subband), the second element is the     * one used to generate the resolution level 1 subbands, and so on. If     * there are less elements in the array than the number of resolution     * levels, then the last one is assumed to repeat itself.     *     * <p>The returned filters are applicable only to the specified component     * and in the current tile.</p>     *     * <p>The resolution level of a subband is the resolution level to which a     * subband contributes, which is different from its decomposition     * level.</p>     *     * @param t The index of the tile for which to return the filters.     *     * @param c The index of the component for which to return the filters.     *     * @return The horizontal analysis wavelet filters used in each level.     * */    public AnWTFilter[] getHorAnWaveletFilters(int t,int c);    /**     * Returns the vertical analysis wavelet filters used in each level, for     * the specified tile-component. The first element in the array is the     * filter used to obtain the lowest resolution (resolution level 0)     * subbands (i.e. lowest frequency LL subband), the second element is the     * one used to generate the resolution level 1 subbands, and so on. If     * there are less elements in the array than the number of resolution     * levels, then the last one is assumed to repeat itself.     *     * <p>The returned filters are applicable only to the specified component     * and in the current tile.</p>     *     * <p>The resolution level of a subband is the resolution level to which a     * subband contributes, which is different from its decomposition     * level.</p>     *     * @param t The index of the tile for which to return the filters.     *     * @param c The index of the component for which to return the filters.     *     * @return The vertical analysis wavelet filters used in each level.     * */    public AnWTFilter[] getVertAnWaveletFilters(int t,int c);    /**     * Returns the number of decomposition levels that are applied to obtain     * the LL band, in the specified tile-component. A value of 0 means that     * no wavelet transform is applied.     *     * @param t The tile index     *     * @param c The index of the component.     *     * @return The number of decompositions applied to obtain the LL subband     * (0 for no wavelet transform).     * */    public int getDecompLevels(int t,int c);    /**     * Returns the wavelet tree decomposition. Only WT_DECOMP_DYADIC is     * supported by JPEG 2000 part I.     *     * @param t The tile index     *     * @param c The index of the component.     *     * @return The wavelet decomposition.     * */    public int getDecomp(int t,int c);}