PLIOCompress (FITS API)

java.lang.Object
- nom.tam.fits.compression.algorithm.plio.PLIOCompress

Direct Known Subclasses:

PLIOCompress.BytePLIOCompressor, PLIOCompress.IntPLIOCompressor, PLIOCompress.ShortPLIOCompressor
```
public abstract class PLIOCompress
extends java.lang.Object
```
The original decompression code was written by Doug Tody, NRAO and included (ported to c and adapted) in cfitsio by William Pence, NASA/GSFC. That code was then ported to Java by R. van Nieuwenhoven. Later it was massively refactored to harmonize the different compression algorithms and reduce the duplicate code pieces without obscuring the algorithm itself as good as possible.

Author:

Doug Tody, William Pence, Richard van Nieuwenhoven

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`PLIOCompress.BytePLIOCompressor`
`static class`	`PLIOCompress.IntPLIOCompressor`	Attention int values are limited to 24 bits!
`static class`	`PLIOCompress.ShortPLIOCompressor`

Constructor Summary

Constructors
Constructor Description

PLIOCompress()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`compress(java.nio.ShortBuffer compressedData, int npix)`	PL_P2L -- Convert a pixel tiledImageOperation to a line list.
`protected int`	`decompress(java.nio.ShortBuffer compressedData, int npix)`	PL_L2PI -- Translate a PLIO line list into an integer pixel tiledImageOperation.
`protected abstract int`	`nextPixel()`
`protected abstract void`	`put(int index, int pixel)`

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

- Constructor Detail
  - PLIOCompress
```
public PLIOCompress()
```
- Method Detail
  - compress
```
protected void compress(java.nio.ShortBuffer compressedData,
                        int npix)
```
    PL_P2L -- Convert a pixel tiledImageOperation to a line list. The length of the list is returned as the function value.
    
    Parameters:
    
    compressedData - encoded line list
    
    npix - number of pixels to convert
  - decompress
```
protected int decompress(java.nio.ShortBuffer compressedData,
                         int npix)
```
    PL_L2PI -- Translate a PLIO line list into an integer pixel tiledImageOperation. The number of pixels output (always npix) is returned as the function value.
    
    Parameters:
    
    compressedData - encoded line list
    
    npix - number of pixels to convert
    
    Returns:
    
    number of pixels converted
  - nextPixel
```
protected abstract int nextPixel()
```
  - put
```
protected abstract void put(int index,
                            int pixel)
```