Package org.web3d.vrml.export.compressors

Class HuffmanTable

java.lang.Object

org.web3d.vrml.export.compressors.HuffmanTable

public class HuffmanTable
extends Object

Prototype Huffman node. Borrowed original impl from Sun HuffmanNode, need to decide if copyright still stands for heavily modified code.

Version:

$Revision: 1.4 $

Author:

Alan Hudson

Method Summary

Modifier and Type	Method	Description
void	clear()	Clear this HuffmanTable instance.
void	computeTags()	Compute optimized tags for each position, color, and normal entry.
void	decode(byte[] tags, int[] data)	Decode a tag into a HuffmanNode.
HuffmanNode	getEntry(HuffmanNode node)
void	print()	Print the contents of this instance to standard out.
void	readDict(InputStream dis)	Read the dictIonary from a stream.
void	setDataLength(int dataLength)	Set the length of each data element in bits.
int	streamBits()	Get the total number of bits needed to writeout the stream used to create this table.
void	writeDict(DataOutputStream dos)	Write the dictionary.

Methods inherited from class java.lang.Object

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

Method Details

setDataLength

public void setDataLength(int dataLength)

Set the length of each data element in bits.

Parameters:

dataLength - The length.

streamBits

public int streamBits()

Get the total number of bits needed to writeout the stream used to create this table.

Returns:

The number of bits

getEntry

public HuffmanNode getEntry(HuffmanNode node)

writeDict

public void writeDict(DataOutputStream dos)
               throws IOException

Write the dictionary.

Parameters:

dos - The stream to write to.

Throws:

IOException

readDict

public void readDict(InputStream dis)
              throws IOException

Read the dictIonary from a stream.

Parameters:

dis - The stream.

Throws:

IOException

decode

public void decode(byte[] tags,
 int[] data)

Decode a tag into a HuffmanNode.

Parameters:

tags - The huffman tag

data - An array to put the decoded node into

clear

public void clear()

Clear this HuffmanTable instance.

computeTags

public void computeTags()

Compute optimized tags for each position, color, and normal entry.

print

public void print()

Print the contents of this instance to standard out.