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: */
047: package jj2000.j2k.image;
048:
049: import jj2000.j2k.image.invcomptransf.*;
050: import jj2000.j2k.wavelet.*;
051: import jj2000.j2k.util.*;
052: import jj2000.j2k.*;
053:
054: import java.util.*;
055:
056: /**
057: * This class extends ModuleSpec class in order to hold tile
058: * specifications for component transformation
059: *
060: * @see ModuleSpec
061: *
062: * */
063: public class CompTransfSpec extends ModuleSpec {
064:
065: /**
066: * Constructs an empty 'CompTransfSpec' with specified number of
067: * tile and components. This constructor is called by the
068: * decoder. Note: The number of component is here for symmetry
069: * purpose. It is useless since only tile specifications are
070: * meaningful.
071: *
072: * @param nt Number of tiles
073: *
074: * @param nc Number of components
075: *
076: * @param type the type of the specification module i.e. tile specific,
077: * component specific or both.
078: *
079: */
080: public CompTransfSpec(int nt, int nc, byte type) {
081: super (nt, nc, type);
082: }
083:
084: /**
085: * Check if component transformation is used in any of the tiles. This
086: * method must not be used by the encoder.
087: *
088: * @return True if a component transformation is used in at least on
089: * tile.
090: *
091: */
092: public boolean isCompTransfUsed() {
093: if (((Integer) def).intValue() != InvCompTransf.NONE) {
094: return true;
095: }
096:
097: if (tileDef != null) {
098: for (int t = nTiles - 1; t >= 0; t--) {
099: if (tileDef[t] != null
100: && (((Integer) tileDef[t]).intValue() != InvCompTransf.NONE)) {
101: return true;
102: }
103: }
104: }
105: return false;
106: }
107: }
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