precinctsizespec.java

jpeg2000算法实现

/*
 * CVS identifier:
 *
 * $Id: PrecinctSizeSpec.java,v 1.17 2001/02/14 10:33:00 grosbois Exp $
 *
 * Class:                   PrecinctSizeSpec
 *
 * Description:             Specification of the precinct sizes
 *
 *
 *
 * 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.entropy;

import jj2000.j2k.codestream.*;
import jj2000.j2k.wavelet.*;
import jj2000.j2k.image.*;
import jj2000.j2k.util.*;
import jj2000.j2k.*;

import java.util.*;

/**
 * This class extends ModuleSpec class for precinct partition sizes holding
 * purposes.
 * 
 * <p>It stores the size a of precinct when precinct partition is used or not.
 * If precinct partition is used, we can have several packets for a given
 * resolution level whereas there is only one packet per resolution level if
 * no precinct partition is used.
 * */
public class PrecinctSizeSpec extends ModuleSpec {

    /** Name of the option */
    private static final String optName = "Cpp";
    
    /** Reference to wavelet number of decomposition levels for each
     * tile-component.  */
    private IntegerSpec dls;
    
    /**
     * Creates a new PrecinctSizeSpec object for the specified number of tiles
     * and components.
     *
     * @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 dls Reference to the number of decomposition levels
     * specification
     * */
    public PrecinctSizeSpec(int nt, int nc, byte type, IntegerSpec dls) {
        super(nt, nc, type);
        this.dls = dls;
    }
    
    /**
     * Creates a new PrecinctSizeSpec object for the specified number of tiles
     * and components and the ParameterList instance.
     *
     * @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 imgsrc The image source (used to get the image size)
     *
     * @param pl The ParameterList instance
     * */
    public PrecinctSizeSpec(int nt, int nc, byte type, BlkImgDataSrc imgsrc, 
                          IntegerSpec dls, ParameterList pl) {
        super(nt, nc, type);
        
        this.dls = dls;
        
        // The precinct sizes are stored in a 2 elements vector array, the
        // first element containing a vector for the precincts width for each
        // resolution level and the second element containing a vector for the
        // precincts height for each resolution level. The precincts sizes are
        // specified from the highest resolution level to the lowest one
        // (i.e. 0).  If there are less elements than the number of
        // decomposition levels, the last element is used for all remaining
        // resolution levels (i.e. if the precincts sizes are specified only
        // for resolutions levels 5, 4 and 3, then the precincts size for
        // resolution levels 2, 1 and 0 will be the same as the size used for
        // resolution level 3).
        
        // Boolean used to know if we were previously reading a precinct's 
        // size or if we were reading something else.
        boolean wasReadingPrecinctSize = false; 

        String param = pl.getParameter(optName);

        // Set precinct sizes to default i.e. 2^15 =
        // Markers.PRECINCT_PARTITION_DEF_SIZE
        Vector tmpv[] = new Vector[2];
        tmpv[0] = new Vector(); // ppx
        tmpv[0].addElement(new Integer(Markers.PRECINCT_PARTITION_DEF_SIZE));
        tmpv[1] = new Vector(); // ppy
        tmpv[1].addElement(new Integer(Markers.PRECINCT_PARTITION_DEF_SIZE));
        setDefault(tmpv);
        
        if ( param==null ) {
            // No precinct size specified in the command line so we do not try 
            // to parse it.
            return;
        }
        
        // Precinct partition is used : parse arguments
        StringTokenizer stk = new StringTokenizer(param);
        byte curSpecType = SPEC_DEF; // Specification type of the
                                     // current parameter
        boolean[] tileSpec = null; // Tiles concerned by the specification
        boolean[] compSpec = null; // Components concerned by the specification
        int i, xIdx, ci, ti;
        
        boolean endOfParamList = false;
        String word = null; // current word
        Integer w, h;
        String errMsg = null;

        while((stk.hasMoreTokens() || wasReadingPrecinctSize) && 
              !endOfParamList){
            
            Vector v[] = new Vector[2]; // v[0] : ppx, v[1] : ppy

            // We do not read the next token if we were reading a precinct's
            // size argument as we have already read the next token into word.
            if ( !wasReadingPrecinctSize ) {
                word = stk.nextToken();
            }

            wasReadingPrecinctSize = false;
            
            switch(word.charAt(0)){
            
            case 't': // Tiles specification
                tileSpec = parseIdx(word,nTiles);
                if(curSpecType==SPEC_COMP_DEF) {
                    curSpecType = SPEC_TILE_COMP;
                }
                else {
                    curSpecType = SPEC_TILE_DEF;
                }
                break;
                
            case 'c': // Components specification
                compSpec = parseIdx(word,nComp);
                if(curSpecType==SPEC_TILE_DEF) {
                    curSpecType = SPEC_TILE_COMP;
                }
                else {
                    curSpecType = SPEC_COMP_DEF;
                }
                break;
            
            default:
                if ( !Character.isDigit(word.charAt(0)) ) {
                    errMsg = "Bad construction for parameter: "+word;
                    throw new IllegalArgumentException(errMsg); 
                }
                
                // Initialises Vector objects
                v[0] = new Vector(); // ppx
                v[1] = new Vector(); // ppy
            
                while ( true ) {
                    
                    // Now get the precinct dimensions
                    try {
                        // Get precinct width
                        w = new Integer(word);
                        
                        // Get next word in argument list
                        try {
                            word = stk.nextToken();
                        }
                        catch (NoSuchElementException e) {