java.lang.Object
- net.sourceforge.jiu.codecs.tiff.TIFFDecoder
- - net.sourceforge.jiu.codecs.tiff.TIFFDecoderModifiedHuffman

```
public class TIFFDecoderModifiedHuffman
extends TIFFDecoder
```
A TIFF decoder for files compresseed with the Modified Huffman method (also known as CCITT 1D Modified Huffman Run Length Encoding). This compression algorithm has the value 2 in the compression tag of an image file directory. Only bilevel images can be encoded with that method.

Since:

0.9.0

Author:

Marco Schmidt

Field Summary

Fields
Modifier and Type Field Description

private int bitBuffer

private DataInput in

private int numBufferedBits

Constructor Summary

Constructors
Constructor Description

TIFFDecoderModifiedHuffman()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`decode()`	Decode data from input and write the decompressed pixel data to the image associated with this decoder.
`private int`	`decodeBlackRun()`
`private void`	`decodeRow(byte[] row)`
`private int`	`decodeRun(int[][][] codes, int minCodeSize)`
`private int`	`decodeWhiteRun()`
`Integer[]`	`getCompressionTypes()`	Returns an array with Integer values of all compression types supported by this decoder (see the COMPRESSION_xyz constants in `TIFFConstants`.
`void`	`initialize()`	Check if all necessary parameters have been given to this decoder and initialize several internal fields from them.
`private int`	`readBit()`
`private int`	`readBits(int number)`
`private void`	`reset()`

Methods inherited from class net.sourceforge.jiu.codecs.tiff.TIFFDecoder
getBytesPerRow, getCodec, getImageFileDirectory, getInput, getTileIndex, getX1, getX2, getY1, getY2, putBytes, setCodec, setImageFileDirectory, setTileIndex

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - in
```
private DataInput in
```
  - bitBuffer
```
private int bitBuffer
```
  - numBufferedBits
```
private int numBufferedBits
```
- Constructor Detail
  - TIFFDecoderModifiedHuffman
```
public TIFFDecoderModifiedHuffman()
```
- Method Detail
  - decode
```
public void decode()
            throws InvalidFileStructureException,
                   IOException
```
    Description copied from class: TIFFDecoder
    
    Decode data from input and write the decompressed pixel data to the image associated with this decoder. Child classes must override this method to implement the decoding for a particular compression type.
    
    Specified by:
    
    decode in class TIFFDecoder
    
    Throws:
    
    InvalidFileStructureException
    
    IOException
  - decodeBlackRun
```
private int decodeBlackRun()
                    throws InvalidFileStructureException,
                           IOException
```
    Throws:
    
    InvalidFileStructureException
    
    IOException
  - decodeRow
```
private void decodeRow(byte[] row)
                throws InvalidFileStructureException,
                       IOException
```
    Throws:
    
    InvalidFileStructureException
    
    IOException
  - decodeRun
```
private int decodeRun(int[][][] codes,
                      int minCodeSize)
               throws InvalidFileStructureException,
                      IOException
```
    Throws:
    
    InvalidFileStructureException
    
    IOException
  - decodeWhiteRun
```
private int decodeWhiteRun()
                    throws InvalidFileStructureException,
                           IOException
```
    Throws:
    
    InvalidFileStructureException
    
    IOException
  - getCompressionTypes
```
public Integer[] getCompressionTypes()
```
    Description copied from class: TIFFDecoder
    
    Returns an array with Integer values of all compression types supported by this decoder (see the COMPRESSION_xyz constants in TIFFConstants. Normally, this is only one value, but some compression types got assigned more than one constant (e.g. deflated). Also, a decoder could be capable of dealing with more than one type of compression if the compression types are similar enough to justify that. However, typically a decoder can only deal with one type of compression.
    
    Specified by:
    
    getCompressionTypes in class TIFFDecoder
    
    Returns:
    
    array with Integer objects of all TIFF compression constants supported by this decoder
  - initialize
```
public void initialize()
                throws IOException,
                       MissingParameterException
```
    Description copied from class: TIFFDecoder
    
    Check if all necessary parameters have been given to this decoder and initialize several internal fields from them. Required parameters are a TIFFCodec object, a TIFFImageFileDirectory object and a tile index.
    
    Overrides:
    
    initialize in class TIFFDecoder
    
    Throws:
    
    IOException
    
    MissingParameterException
  - readBit
```
private int readBit()
             throws IOException
```
    Throws:
    
    IOException
  - readBits
```
private int readBits(int number)
              throws IOException
```
    Throws:
    
    IOException
  - reset
```
private void reset()
```

Modifier and Type	Field	Description
`private int`	`bitBuffer`
`private DataInput`	`in`
`private int`	`numBufferedBits`

Class TIFFDecoderModifiedHuffman

Field Summary

Constructor Summary

Method Summary

Methods inherited from class net.sourceforge.jiu.codecs.tiff.TIFFDecoder

Methods inherited from class java.lang.Object

Field Detail

in

bitBuffer

numBufferedBits

Constructor Detail

TIFFDecoderModifiedHuffman

Method Detail

decode

decodeBlackRun

decodeRow

decodeRun

decodeWhiteRun

getCompressionTypes

initialize

readBit

readBits

reset