Class ArithmeticDecoder

java.lang.Object

org.apache.pdfbox.jbig2.decoder.arithmetic.ArithmeticDecoder

public class ArithmeticDecoder
extends Object

This class represents the arithmetic decoder, described in ISO/IEC 14492:2001 in E.3

Field Summary

Fields

Modifier and Type	Field	Description
private int	a
private int	b
private long	c
private int	ct
private final ImageInputStream	iis
private static final int[][]	QE
private long	streamPos0

Constructor Summary

Constructors

Constructor	Description
ArithmeticDecoder(ImageInputStream iis)

Method Summary

Modifier and Type	Method	Description
private void	byteIn()
int	decode(CX cx)
(package private) int	getA()
(package private) long	getC()
private void	init()
private int	lpsExchange(CX cx, int icx, int qeValue)
private int	mpsExchange(CX cx, int icx)
private void	renormalize()

Methods inherited from class Object

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

Field Details

QE

private static final int[][] QE

a

private int a

c

private long c

ct

private int ct

b

private int b

streamPos0

private long streamPos0

iis

private final ImageInputStream iis

Constructor Details

ArithmeticDecoder

public ArithmeticDecoder(ImageInputStream iis)
                  throws IOException

Throws:

IOException

Method Details

init

private void init()
           throws IOException

Throws:

IOException

decode

public int decode(CX cx)
           throws IOException

Throws:

IOException

byteIn

private void byteIn()
             throws IOException

Throws:

IOException

renormalize

private void renormalize()
                  throws IOException

Throws:

IOException

mpsExchange

private int mpsExchange(CX cx,
 int icx)

lpsExchange

private int lpsExchange(CX cx,
 int icx,
 int qeValue)

getA

int getA()

getC

long getC()