org.web3d.vrml.export.compressors
Class BitUnpacker

java.lang.Object
  org.web3d.vrml.export.compressors.BitUnpacker

public class BitUnpacker
extends java.lang.Object

UnPack a stream of integers of variables bits from a packed form. Loosely copied from Johnathon Blow's "Packing Integers" article.

Version:

$Revision: 1.3 $

Author:

Alan Hudson

Constructor Summary

BitUnpacker(byte[] buffer)
Construct a bit unpacker.

Method Summary

long	getNumBitsRemaining() Get the number of bits remaining to be procesed.
static void	main(java.lang.String[] args) Small test of unpack/pack routines.
void	reset(byte[] buffer) Set this bit unpacker to a new value.
int	unpack(int num_bits) Unpack a number of bits.

Methods inherited from class java.lang.Object

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

Constructor Detail

BitUnpacker

public BitUnpacker(byte[] buffer)

Construct a bit unpacker.

Parameters:

buffer - The buffer to decode.

Method Detail

unpack

public int unpack(int num_bits)

Unpack a number of bits.

reset

public void reset(byte[] buffer)

Set this bit unpacker to a new value. Resests the postion to the beginning.

getNumBitsRemaining

public long getNumBitsRemaining()

Get the number of bits remaining to be procesed.

Returns:

The number of bits left to process.

main

public static void main(java.lang.String[] args)

Small test of unpack/pack routines.