org.jmisb.core.klv

Class CRC32MPEG2

java.lang.Object

org.jmisb.core.klv.CRC32MPEG2

public class CRC32MPEG2
extends Object

Calculate CRC32 per ISO/IEC 13818-1.

This is one of several incompatible CRC32 implementations.

Constructor Summary

Constructors

Constructor and Description
CRC32MPEG2()

Method Summary

Modifier and Type	Method and Description
static byte[]	compute(byte[] fullMessage) Compute CRC32 checksum for byte array and insert into array.
byte[]	getCRC32()
void	update(byte[] bytes, int meaningfulLength)
static boolean	verify(byte[] fullMessage, byte[] expected) Verify CRC32 checksum for byte array.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CRC32MPEG2

public CRC32MPEG2()

Method Detail

update

public void update(byte[] bytes,
                   int meaningfulLength)

getCRC32

public byte[] getCRC32()

compute

public static byte[] compute(byte[] fullMessage)

Compute CRC32 checksum for byte array and insert into array.

This uses the CRC32 checksum specified by ISO/IEC-13818-1. This is used in ST0806.

This is not the same checksum as is used in ST0601.

Parameters:

fullMessage - Byte array of the full message packet

Returns:

4-byte checksum

verify

public static boolean verify(byte[] fullMessage,
                             byte[] expected)

Verify CRC32 checksum for byte array.

This uses the CRC32 checksum specified by ISO/IEC-13818-1. This is used in ST0806.

This is not the same checksum as is used in ST0601.

Parameters:

fullMessage - Byte array of the full message packet

expected - expected checksum value

Returns:

true if expected checksum validates against data.