Source Code Cross Referenced for CBlkInfo.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » jj2000 » j2k » codestream » reader » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » jj2000.j2k.codestream.reader 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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