jj2000.j2k.image.forwcomptransf.ForwCompTransfSpec Maven / Gradle / Ivy
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/*
* $RCSfile: ForwCompTransfSpec.java,v $
* $Revision: 1.1 $
* $Date: 2005/02/11 05:02:13 $
* $State: Exp $
*
* Class: ForwCompTransfSpec
*
* Description: Component Transformation specification for encoder
*
*
*
* 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.image.forwcomptransf;
import java.util.StringTokenizer;
import jj2000.j2k.image.CompTransfSpec;
import jj2000.j2k.wavelet.FilterTypes;
import jj2000.j2k.wavelet.analysis.AnWTFilter;
import jj2000.j2k.wavelet.analysis.AnWTFilterSpec;
import com.github.jaiimageio.jpeg2000.impl.J2KImageWriteParamJava;
/**
* This class extends CompTransfSpec class in order to hold encoder specific
* aspects of CompTransfSpec.
*
* @see CompTransfSpec
* */
public class ForwCompTransfSpec extends CompTransfSpec implements FilterTypes {
private String defaultValue = null;
/**
* Constructs a new 'ForwCompTransfSpec' for the specified number of
* components and tiles and the arguments of optName
* option. This constructor is called by the encoder. It also
* checks that the arguments belongs to the recognized arguments
* list.
*
* This constructor chose the component transformation type
* depending on the wavelet filters : RCT with w5x3 filter and ICT
* with w9x7 filter. Note: All filters must use the same data
* type.
*
* @param nt The number of tiles
*
* @param nc The number of components
*
* @param type the type of the specification module i.e. tile specific,
* component specific or both.
*
* @param wfs The wavelet filter specifications
* */
public ForwCompTransfSpec(int nt, int nc, byte type, AnWTFilterSpec wfs,
J2KImageWriteParamJava wp, String values){
super(nt,nc,type);
String param = values;
specified = values;
if(values==null){
// If less than three component, do not use any component
// transformation
if(nc<3) {
setDefault("none");
return;
}
// If the compression is lossless, uses RCT
else if(wp.getLossless()) {
setDefault("rct");
return;
} else {
AnWTFilter[][] anfilt;
int[] filtType = new int[nComp];
for(int c=0; c<3; c++) {
anfilt = (AnWTFilter[][])wfs.getCompDef(c);
filtType[c] = anfilt[0][0].getFilterType();
}
// Check that the three first components use the same filters
boolean reject = false;
for(int c=1; c<3; c++){
if(filtType[c]!=filtType[0]) reject = true;
}
if(reject) {
setDefault("none");
} else {
anfilt = (AnWTFilter[][])wfs.getCompDef(0);
if(anfilt[0][0].getFilterType()==W9X7) {
setDefault("ict");
} else {
setDefault("rct");
}
}
}
// Each tile receives a component transform specification
// according the type of wavelet filters that are used by the
// three first components
for(int t=0; t=0; i--)
if(tileSpec[i]) {
setTileDef(i,"none");
}
}
} else if(word.equals("on")) {
if(nc<3) {
setDefault("none");
break;
}
if(curSpecType==SPEC_DEF) { // Set arbitrarily the default
// value to RCT (later will be found the suitable
// component transform for each tile)
setDefault("rct");
} else if (curSpecType==SPEC_TILE_DEF) {
for(int i=tileSpec.length-1; i>=0; i--) {
if(tileSpec[i]) {
if(getFilterType(i,wfs)==W5X3) {
setTileDef(i,"rct");
} else {
setTileDef(i,"ict");
}
}
}
}
} else {
throw new IllegalArgumentException("Default parameter of "+
"option Mct not"+
" recognized: "+param);
}
// Re-initialize
curSpecType = SPEC_DEF;
tileSpec = null;
break;
}
}
// Check that default value has been specified
if(getDefault()==null) {
// If not, set arbitrarily the default value to 'none' but
// specifies explicitely a default value for each tile depending
// on the wavelet transform that is used
setDefault("none");
for(int t=0; t=0; t--) {
if(((String)getTileDef(t)).equals("none")) {
// No comp. transf is used. No check is needed
continue;
}
else if(((String)getTileDef(t)).equals("rct")) {
// Tile is using Reversible component transform
int filterType = getFilterType(t,wfs);
switch(filterType){
case FilterTypes.W5X3: // OK
break;
case FilterTypes.W9X7: // Must use ICT
if(isTileSpecified(t)){
// User has requested RCT -> Error
throw new IllegalArgumentException("Cannot use RCT "+
"with 9x7 filter "+
"in tile "+t);
}
else{ // Specify ICT for this tile
setTileDef(t,"ict");
}
break;
default:
throw new IllegalArgumentException("Default filter is "+
"not JPEG 2000 part"+
" I compliant");
}
} else { // ICT
int filterType = getFilterType(t,wfs);
switch(filterType) {
case FilterTypes.W5X3: // Must use RCT
if(isTileSpecified(t)){
// User has requested ICT -> Error
throw new IllegalArgumentException("Cannot use ICT "+
"with filter 5x3 "+
"in tile "+t);
}
else{
setTileDef(t,"rct");
}
break;
case FilterTypes.W9X7: // OK
break;
default:
throw new IllegalArgumentException("Default filter is "+
"not JPEG 2000 part"+
" I compliant");
}
}
}
}
/** Get the filter type common to all component of a given tile. If the
* tile index is -1, it searches common filter type of default
* specifications.
*
* @param t The tile index
*
* @param wfs The analysis filters specifications
*
* @return The filter type common to all the components
*
*/
private int getFilterType(int t, AnWTFilterSpec wfs){
AnWTFilter[][] anfilt;
int[] filtType = new int[nComp];
for(int c=0;c