001/*
002 * $RCSfile: CompTransfSpec.java,v $
003 * $Revision: 1.1 $
004 * $Date: 2005/02/11 05:02:11 $
005 * $State: Exp $
006 *
007 * Class:                   CompTransfSpec
008 *
009 * Description:             Component Transformation specification
010 *
011 *
012 *
013 * COPYRIGHT:
014 *
015 * This software module was originally developed by Raphaël Grosbois and
016 * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
017 * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
018 * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
019 * Centre France S.A) in the course of development of the JPEG2000
020 * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
021 * software module is an implementation of a part of the JPEG 2000
022 * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
023 * Systems AB and Canon Research Centre France S.A (collectively JJ2000
024 * Partners) agree not to assert against ISO/IEC and users of the JPEG
025 * 2000 Standard (Users) any of their rights under the copyright, not
026 * including other intellectual property rights, for this software module
027 * with respect to the usage by ISO/IEC and Users of this software module
028 * or modifications thereof for use in hardware or software products
029 * claiming conformance to the JPEG 2000 Standard. Those intending to use
030 * this software module in hardware or software products are advised that
031 * their use may infringe existing patents. The original developers of
032 * this software module, JJ2000 Partners and ISO/IEC assume no liability
033 * for use of this software module or modifications thereof. No license
034 * or right to this software module is granted for non JPEG 2000 Standard
035 * conforming products. JJ2000 Partners have full right to use this
036 * software module for his/her own purpose, assign or donate this
037 * software module to any third party and to inhibit third parties from
038 * using this software module for non JPEG 2000 Standard conforming
039 * products. This copyright notice must be included in all copies or
040 * derivative works of this software module.
041 *
042 * Copyright (c) 1999/2000 JJ2000 Partners.
043 *
044 *
045 *
046 */
047package jj2000.j2k.image;
048
049import jj2000.j2k.ModuleSpec;
050import jj2000.j2k.image.invcomptransf.InvCompTransf;
051
052/**
053 * This class extends ModuleSpec class in order to hold tile
054 * specifications for component transformation
055 *
056 * @see ModuleSpec
057 *
058 * */
059public class CompTransfSpec extends ModuleSpec{
060
061    /**
062     * Constructs an empty 'CompTransfSpec' with specified number of
063     * tile and components. This constructor is called by the
064     * decoder. Note: The number of component is here for symmetry
065     * purpose. It is useless since only tile specifications are
066     * meaningful.
067     *
068     * @param nt Number of tiles
069     *
070     * @param nc Number of components
071     *
072     * @param type the type of the specification module i.e. tile specific,
073     * component specific or both.
074     *
075     */
076    public CompTransfSpec(int nt, int nc, byte type){
077        super(nt, nc, type);
078    }
079
080
081    /**
082     * Check if component transformation is used in any of the tiles. This
083     * method must not be used by the encoder.
084     *
085     * @return True if a component transformation is used in at least on
086     * tile.
087     *
088     */
089    public boolean isCompTransfUsed(){
090        if( ((Integer)def).intValue() != InvCompTransf.NONE ){
091            return true;
092        }
093
094        if(tileDef!=null){
095            for(int t=nTiles-1; t>=0; t--){
096                if(tileDef[t]!=null &&
097                   ( ((Integer)tileDef[t]).intValue() != InvCompTransf.NONE) ){
098                    return true;
099                }
100            }
101        }
102        return false;
103    }
104}