com.twelvemonkeys.io.enc
Class PackBits16Decoder

java.lang.Object
  com.twelvemonkeys.io.enc.PackBits16Decoder

All Implemented Interfaces:

Decoder

public final class PackBits16Decoder
extends Object
implements Decoder

Decoder implementation for 16 bit-chunked Apple PackBits-like run-length encoding.

This version of the decoder decodes chunk of 16 bit, instead of 8 bit. This format is used in certain PICT files.

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/io/enc/PackBits16Decoder.java#2 $

Author:

Harald Kuhr

See Also:

PackBitsDecoder

Constructor Summary

PackBits16Decoder()
Creates a PackBitsDecoder.

PackBits16Decoder(boolean pDisableNoop)
Creates a PackBitsDecoder.

Method Summary

int	decode(InputStream stream, ByteBuffer buffer) Decodes bytes from the given input stream, to the given buffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

PackBits16Decoder

public PackBits16Decoder()

Creates a PackBitsDecoder.

PackBits16Decoder

public PackBits16Decoder(boolean pDisableNoop)

Creates a PackBitsDecoder.

As some implementations of PackBits-like encoders treat -128 as length of a compressed run, instead of a no-op, it's possible to disable no-ops for compatibility. Should be used with caution, even though, most known encoders never write no-ops in the compressed streams.

Parameters:

pDisableNoop - true if -128 should be treated as a compressed run, and not a no-op

Method Detail

decode

public int decode(InputStream stream,
                  ByteBuffer buffer)
           throws IOException

Decodes bytes from the given input stream, to the given buffer.

Specified by:

decode in interface Decoder

Parameters:

stream - the stream to decode from

buffer - a byte array, minimum 128 (or 129 if no-op is disabled) bytes long

Returns:

The number of bytes decoded

Throws:

IOException

DecodeException - if encoded data is corrupt.

EOFException - if a premature end-of-file is encountered.