de.carne.nio.compression.common

Class HuffmanDecoder

java.lang.Object

de.carne.nio.compression.common.HuffmanDecoder

public final class HuffmanDecoder
extends java.lang.Object

Huffman symbol decoding support.

Constructor Summary

Constructors

Constructor and Description
HuffmanDecoder(int maxBits, int maxSymbols) Construct HuffmanDecoder.

Method Summary

Modifier and Type	Method and Description
int	decodeSymbol(java.nio.channels.ReadableByteChannel src, BitDecoder bitDecoder, int bufferIndex) Decode next symbol.
void	setCodeLengths(byte[] codeLengths) Set code lengths.

Methods inherited from class java.lang.Object

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

Constructor Detail

HuffmanDecoder

public HuffmanDecoder(int maxBits,
                      int maxSymbols)

Construct HuffmanDecoder.

Parameters:

maxBits - Maximum length of a symbol.

maxSymbols - Maximum number of symbols.

Method Detail

setCodeLengths

public void setCodeLengths(byte[] codeLengths)
                    throws java.io.IOException

Set code lengths.

Parameters:

codeLengths - The code lengths to set.

Throws:

java.io.IOException - if inconsistent data is encountered.

decodeSymbol

public int decodeSymbol(java.nio.channels.ReadableByteChannel src,
                        BitDecoder bitDecoder,
                        int bufferIndex)
                 throws java.io.IOException

Decode next symbol.

Parameters:

src - The channel to read the symbol from.

bitDecoder - The BitDecoder to use for bit decoding.

bufferIndex - The bit buffer to use for bit decoding.

Returns:

The read symbol.

Throws:

java.io.IOException - If an I/O error occurred.