Class HorizontalDeDifferencingFloatingPointStream

java.lang.Object

java.io.InputStream

com.twelvemonkeys.imageio.plugins.tiff.HorizontalDeDifferencingFloatingPointStream

All Implemented Interfaces:

Closeable, AutoCloseable

final class HorizontalDeDifferencingFloatingPointStream
extends InputStream

A decoder for data converted using "floating point horizontal differencing predictor".

Version:

$Id: HorizontalDeDifferencingStream.java,v 1.0 11.03.13 14:20 haraldk Exp$

Field Summary

Fields

Modifier and Type	Field	Description
private final ByteBuffer	buffer
private final int	bytesPerSample
private final ReadableByteChannel	channel
private final int	columns
private final byte[]	fpRow
private final int	samplesPerPixel

Constructor Summary

Constructors

Constructor	Description
HorizontalDeDifferencingFloatingPointStream(InputStream stream, int columns, int samplesPerPixel, int bitsPerSample, ByteOrder byteOrder)

Method Summary

Modifier and Type	Method	Description
void	close()
private void	decodeDeltaBytes(byte[] bytes, int columns, int samplesPerPixel)
private void	decodeFloatingPointDelta(byte[] input, byte[] output, int columns, int channels, int bytesPerSample, ByteOrder order)
private void	decodeRow()
private boolean	fetch()
private static boolean	isValidBPS(int bitsPerSample)
int	read()
int	read(byte[] b, int off, int len)
long	skip(long n)

Methods inherited from class InputStream

available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skipNBytes, transferTo

Methods inherited from class Object

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

Field Details

columns

private final int columns

samplesPerPixel

private final int samplesPerPixel

bytesPerSample

private final int bytesPerSample

channel

private final ReadableByteChannel channel

buffer

private final ByteBuffer buffer

fpRow

private final byte[] fpRow

Constructor Details

HorizontalDeDifferencingFloatingPointStream

public HorizontalDeDifferencingFloatingPointStream(InputStream stream,
 int columns,
 int samplesPerPixel,
 int bitsPerSample,
 ByteOrder byteOrder)

Method Details

isValidBPS

private static boolean isValidBPS(int bitsPerSample)

fetch

private boolean fetch()
               throws IOException

Throws:

IOException

decodeDeltaBytes

private void decodeDeltaBytes(byte[] bytes,
 int columns,
 int samplesPerPixel)

decodeFloatingPointDelta

private void decodeFloatingPointDelta(byte[] input,
 byte[] output,
 int columns,
 int channels,
 int bytesPerSample,
 ByteOrder order)

decodeRow

private void decodeRow()

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException