001: /*
002: * $RCSfile: PktInfo.java,v $
003: * $Revision: 1.1 $
004: * $Date: 2005/02/11 05:02:02 $
005: * $State: Exp $
006: *
007: * Class: PktInfo
008: *
009: * Description: Object containing packet 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: package jj2000.j2k.codestream.reader;
045:
046: import java.util.*;
047:
048: /**
049: * This class defines an object used to countain informations about a packet
050: * to which the current code-block belongs.
051: *
052: * @see CBlkInfo
053: * */
054: public class PktInfo {
055:
056: /** Index of the packet */
057: public int packetIdx;
058:
059: /** The layer associated with the current code-block in this packet. */
060: public int layerIdx;
061:
062: /** The code-block offset in the codestream (for this packet) */
063: public int cbOff = 0;
064:
065: /** The length of the code-block in this packet (in bytes) */
066: public int cbLength;
067:
068: /**
069: * The length of each terminated segment in the packet. The total is the
070: * same as 'cbLength'. It can be null if there is only one terminated
071: * segment, in which case 'cbLength' holds the legth of that segment
072: * */
073: public int segLengths[];
074:
075: /**
076: * The number of truncation points that appear in this packet, and all
077: * previous packets, for this code-block. This is the number of passes
078: * that can be decoded with the information in this packet and all
079: * previous ones.
080: * */
081: public int numTruncPnts;
082:
083: /**
084: * Classe's constructor.
085: *
086: * @param lyIdx The layer index for the code-block in this packet
087: *
088: * @param pckIdx The packet index
089: * */
090: public PktInfo(int lyIdx, int pckIdx) {
091: layerIdx = lyIdx;
092: packetIdx = pckIdx;
093: }
094:
095: /**
096: * Object information in a string.
097: *
098: * @return Object information
099: * */
100: public String toString() {
101: return "packet " + packetIdx + " (lay:" + layerIdx + ", off:"
102: + cbOff + ", len:" + cbLength + ", numTruncPnts:"
103: + numTruncPnts + ")\n";
104: }
105: }
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