001: /*
002: * $RCSfile: CBlkInfo.java,v $
003: * $Revision: 1.1 $
004: * $Date: 2005/02/11 05:02:01 $
005: * $State: Exp $
006: *
007: * Class: CBlkInfo
008: *
009: * Description: Object containing code-block informations.
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:
048: package jj2000.j2k.codestream.reader;
049:
050: import java.util.*;
051:
052: /**
053: * This class contains location of code-blocks' piece of codewords
054: * (there is one piece per layer) and some other information.
055: *
056: * */
057: public class CBlkInfo {
058:
059: /** Upper-left x-coordinate of the code-block (relative to the
060: tile) */
061: public int ulx;
062:
063: /** Upper-left y-coordinate of the code-block (relative to the
064: tile) */
065: public int uly;
066:
067: /** Width of the code-block */
068: public int w;
069:
070: /** Height of the code-block */
071: public int h;
072:
073: /** The number of most significant bits which are skipped for this
074: * code-block (= Mb-1-bitDepth). See VM text */
075: public int msbSkipped;
076:
077: /** Length of each piece of code-block's codewords */
078: public int[] len;
079:
080: /** Offset of each piece of code-block's codewords in the file */
081: public int[] off;
082:
083: /** The number of truncation point for each layer */
084: public int[] ntp;
085:
086: /** The cumulative number of truncation points */
087: public int ctp;
088:
089: /** The length of each segment (used with regular termination or
090: * in selective arithmetic bypass coding mode) */
091: public int[][] segLen;
092:
093: /** Index of the packet where each layer has been found */
094: public int[] pktIdx;
095:
096: /**
097: * Constructs a new instance with specified number of layers and
098: * code-block coordinates. The number corresponds to the maximum
099: * piece of codeword for one code-block.
100: *
101: * @param ulx The uper-left x-coordinate
102: *
103: * @param uly The uper-left y-coordinate
104: *
105: * @param w Width of the code-block
106: *
107: * @param h Height of the code-block
108: *
109: * @param nl The number of layers
110: *
111: */
112: public CBlkInfo(int ulx, int uly, int w, int h, int nl) {
113: this .ulx = ulx;
114: this .uly = uly;
115: this .w = w;
116: this .h = h;
117: off = new int[nl];
118: len = new int[nl];
119: ntp = new int[nl];
120: segLen = new int[nl][];
121: pktIdx = new int[nl];
122: for (int i = nl - 1; i >= 0; i--)
123: pktIdx[i] = -1;
124: }
125:
126: /**
127: * Adds the number of new truncation for specified layer.
128: *
129: * @param l layer index
130: *
131: * @param newtp Number of new truncation points
132: *
133: */
134: public void addNTP(int l, int newtp) {
135: ntp[l] = newtp;
136: ctp = 0;
137: for (int lIdx = 0; lIdx <= l; lIdx++) {
138: ctp += ntp[lIdx];
139: }
140: }
141:
142: /**
143: * Object information in a string.
144: *
145: * @return Object information
146: *
147: */
148: public String toString() {
149: String string = "(ulx,uly,w,h)= " + ulx + "," + uly + "," + w
150: + "," + h;
151: string += ", " + msbSkipped + " MSB bit(s) skipped\n";
152: if (len != null)
153: for (int i = 0; i < len.length; i++) {
154: string += "\tl:" + i + ", start:" + off[i] + ", len:"
155: + len[i] + ", ntp:" + ntp[i] + ", pktIdx="
156: + pktIdx[i];
157: if (segLen != null && segLen[i] != null) {
158: string += " { ";
159: for (int j = 0; j < segLen[i].length; j++)
160: string += segLen[i][j] + " ";
161: string += "}";
162: }
163: string += "\n";
164: }
165: string += "\tctp=" + ctp;
166: return string;
167: }
168: }
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