Class JPEGLosslessDecoder

java.lang.Object

com.twelvemonkeys.imageio.plugins.jpeg.JPEGLosslessDecoder

final class JPEGLosslessDecoder
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private final int[][]	acTab
private final int[][]	dcTab
private final Frame	frame
private final int[][][]	HuffTab
private final List<HuffmanTable>	huffTables
private static final int[]	IDCT_P
private final int[]	IDCT_Source
private final ImageInputStream	input
private final JPEGImageReader	listenerDelegate
private int	marker
private int	markerIndex
private int	mask
private static final int	MAX_HUFFMAN_SUBTREE
private static final int	MSB
private final int[]	nBlock
private int	numComp
private int[][]	outputData
private final int[][]	qTab
private final QuantizationTable	quantTable
private static final int	RESTART_MARKER_BEGIN
private static final int	RESTART_MARKER_END
private boolean	restarting
private int	restartInterval
private Scan	scan
private int	selection
private int	xDim
private int	xLoc
private int	yDim
private int	yLoc

Constructor Summary

Constructors

Constructor	Description
JPEGLosslessDecoder(List<Segment> segments, ImageInputStream data, JPEGImageReader listenerDelegate)

Method Summary

Modifier and Type	Method	Description
(package private) int[][]	decode()
private int	decode(int[] prev, int[] temp, int[] index)
private int	decode0(int[] prev, int[] temp, int[] index)
private int	decodeAny(int[] prev, int[] temp, int[] index)
private int	decodeRGB(int[] prev, int[] temp, int[] index)
private int	decodeSingle(int[] prev, int[] temp, int[] index)
private <T> T	get(List<Segment> segments, Class<T> type)
private <T> List<T>	getAll(List<Segment> segments, Class<T> type)
private Frame.Component	getComponentSpec(Frame.Component[] components, int sel)
(package private) int	getDimX()
(package private) int	getDimY()
private int	getHuffmanValue(int[] table, int[] temp, int[] index)
private int	getn(int[] pred, int n, int[] temp, int[] index)
(package private) int	getNumComponents()
(package private) int	getPrecision()
private int	getPreviousX(int[] data)
private int	getPreviousXY(int[] data)
private int	getPreviousY(int[] data)
private boolean	isLastPixel()
private boolean	isLossless()
private void	output(int[] pred)
private void	outputAny(int[] pred)
private void	outputRGB(int[] pred)
private void	outputSingle(int[] pred)
private void	processWarningOccured(String warning)
private int	readNumber()
private Scan	readScan()
private boolean	useACForDC(int dcTabSel)

Methods inherited from class Object

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

Field Details

input

private final ImageInputStream input

listenerDelegate

private final JPEGImageReader listenerDelegate

frame

private final Frame frame

huffTables

private final List<HuffmanTable> huffTables

quantTable

private final QuantizationTable quantTable

scan

private Scan scan

HuffTab

private final int[][][] HuffTab

IDCT_Source

private final int[] IDCT_Source

nBlock

private final int[] nBlock

acTab

private final int[][] acTab

dcTab

private final int[][] dcTab

qTab

private final int[][] qTab

restarting

private boolean restarting

marker

private int marker

markerIndex

private int markerIndex

numComp

private int numComp

restartInterval

private int restartInterval

selection

private int selection

xDim

private int xDim

yDim

private int yDim

xLoc

private int xLoc

yLoc

private int yLoc

mask

private int mask

outputData

private int[][] outputData

IDCT_P

private static final int[] IDCT_P

RESTART_MARKER_BEGIN

private static final int RESTART_MARKER_BEGIN

See Also:

• Constant Field Values

RESTART_MARKER_END

private static final int RESTART_MARKER_END

See Also:

• Constant Field Values

MAX_HUFFMAN_SUBTREE

private static final int MAX_HUFFMAN_SUBTREE

See Also:

• Constant Field Values

MSB

private static final int MSB

See Also:

• Constant Field Values

Constructor Details

JPEGLosslessDecoder

JPEGLosslessDecoder(List<Segment> segments,
 ImageInputStream data,
 JPEGImageReader listenerDelegate)

Method Details

getDimX

int getDimX()

getDimY

int getDimY()

getAll

private <T> List<T> getAll(List<Segment> segments,
 Class<T> type)

get

private <T> T get(List<Segment> segments,
 Class<T> type)

decode

int[][] decode()
        throws IOException

Throws:

IOException

processWarningOccured

private void processWarningOccured(String warning)

useACForDC

private boolean useACForDC(int dcTabSel)

isLossless

private boolean isLossless()

getComponentSpec

private Frame.Component getComponentSpec(Frame.Component[] components,
 int sel)

readScan

private Scan readScan()
               throws IOException

Throws:

IOException

decode

private int decode(int[] prev,
 int[] temp,
 int[] index)
            throws IOException

Throws:

IOException

decodeSingle

private int decodeSingle(int[] prev,
 int[] temp,
 int[] index)
                  throws IOException

Throws:

IOException

decodeRGB

private int decodeRGB(int[] prev,
 int[] temp,
 int[] index)
               throws IOException

Throws:

IOException

decodeAny

private int decodeAny(int[] prev,
 int[] temp,
 int[] index)
               throws IOException

Throws:

IOException

decode0

private int decode0(int[] prev,
 int[] temp,
 int[] index)
             throws IOException

Throws:

IOException

getHuffmanValue

private int getHuffmanValue(int[] table,
 int[] temp,
 int[] index)
                     throws IOException

Throws:

IOException

getn

private int getn(int[] pred,
 int n,
 int[] temp,
 int[] index)
          throws IOException

Throws:

IOException

getPreviousX

private int getPreviousX(int[] data)

getPreviousXY

private int getPreviousXY(int[] data)

getPreviousY

private int getPreviousY(int[] data)

isLastPixel

private boolean isLastPixel()

output

private void output(int[] pred)

outputSingle

private void outputSingle(int[] pred)

outputRGB

private void outputRGB(int[] pred)

outputAny

private void outputAny(int[] pred)

readNumber

private int readNumber()
                throws IOException

Throws:

IOException

getNumComponents

int getNumComponents()

getPrecision

int getPrecision()