org.itadaki.bzip2

Class BZip2HuffmanStageDecoder

java.lang.Object

org.itadaki.bzip2.BZip2HuffmanStageDecoder

public class BZip2HuffmanStageDecoder
extends Object

A decoder for the BZip2 Huffman coding stage

Constructor Summary

Constructors

Constructor and Description
BZip2HuffmanStageDecoder(BZip2BitInputStream bitInputStream, int alphabetSize, byte[][] tableCodeLengths, byte[] selectors)

Method Summary

Methods

Modifier and Type	Method and Description
int	nextSymbol() Decodes and returns the next symbol

Methods inherited from class java.lang.Object

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

Constructor Detail

BZip2HuffmanStageDecoder

public BZip2HuffmanStageDecoder(BZip2BitInputStream bitInputStream,
                        int alphabetSize,
                        byte[][] tableCodeLengths,
                        byte[] selectors)

Parameters:

bitInputStream - The BZip2BitInputStream from which Huffman codes are read

alphabetSize - The total number of codes (uniform for each table)

tableCodeLengths - The Canonical Huffman code lengths for each table

selectors - The Huffman table number to use for each group of 50 symbols

Method Detail

nextSymbol

public int nextSymbol()
               throws IOException

Decodes and returns the next symbol

Returns:

The decoded symbol

Throws:

IOException - if the end of the input stream is reached while decoding