top.bayberry.core.image.util

类 JPEGDecoder

java.lang.Object

top.bayberry.core.image.util.AbstractImageDecoder

top.bayberry.core.image.util.JPEGDecoder

所有已实现的接口:

CalculateConsts, ImageDecoder

public class JPEGDecoder
extends AbstractImageDecoder

字段概要

从类继承的字段 top.bayberry.core.image.util.AbstractImageDecoder

extendImageHeaderReaders

从接口继承的字段 top.bayberry.core.image.util.CalculateConsts

AAN_SCALES, BLOCK_NATURAL_ORDER, CENTERJSAMPLE, DCTSIZE, DCTSIZE2, DOUBLE_QUANT_HASH, DOUBLE_QUANT_SUMS, ICC_PROFILE_LABEL, MAXJSAMPLE, RANGE_MASK, sampleRangeLimitOffset, sampleRangeLimitTable, SINGLE_QUANT_HASH, SINGLE_QUANT_SUMS

构造器概要

构造器

构造器和说明
JPEGDecoder(ImageInputStream in)
JPEGDecoder(ImageInputStream in, boolean fastIDCTMode, boolean supportICC)

方法概要

限定符和类型	方法和说明
protected void	calculateMCUs(int[] componentIndexes, Component[] components)
protected void	createFrameHeader(boolean baseline, boolean progressive)
protected ImageWrapper	createImage()
ImageWrapper	decode()
protected int	decodeACFirst(HuffmanTable huffTable, int Ss, int Se, int Al, int[] mcu, int blkIndex)
protected int	decodeACRefine(HuffmanTable huffTable, int Ss, int Se, int Al, int[] mcu, int blkIndex)
protected void	decodeDAC()
protected int	decodeDCFirst(int index, HuffmanTable huffTable, int Al, int[] mcu, int blkIndex)
protected int	decodeDCRefine(int Al, int[] mcu, int blkIndex)
protected void	decodeDNL()
protected void	decodeDRI()
protected void	decodeExtendMarker(int marker)
protected int	decodeFrame(int marker)
protected void	decodeHuffmanTable()
protected int	decodeProgressiveScan(int marker) Decode progressive scan
protected void	decodeQuantizationTable()
protected int	decodeScan(int marker) Decode baseline and sequencal scan
protected void	determinColorspace()
protected ColorSpace	getColorSpace()
ExtendImageHeader	getExtendImageHeader()
int	getQuality()
protected void	inverseDCT()
protected boolean	isSOFnMarker(int marker) can opt using array
protected int	nextMarker()
protected void	readFrameHeader(int marker)
protected int[]	readScanHeader()
protected void	readTables(int marker)
protected void	resetDecoder()
protected void	validateProgressiveParam()
protected void	writeFull() Used by progressive mode
protected void	writeMCU()

从类继承的方法 top.bayberry.core.image.util.AbstractImageDecoder

addExtendHeaderReader, getExtendHeaderReaders, removeExtendHeaderReader

从类继承的方法 java.lang.Object

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

构造器详细资料

JPEGDecoder

public JPEGDecoder(ImageInputStream in,
                   boolean fastIDCTMode,
                   boolean supportICC)

JPEGDecoder

public JPEGDecoder(ImageInputStream in)

方法详细资料

decode

public ImageWrapper decode()
                    throws IOException

指定者:

decode 在接口中 ImageDecoder

指定者:

decode 在类中 AbstractImageDecoder

抛出:

IOException

createImage

protected ImageWrapper createImage()

getColorSpace

protected ColorSpace getColorSpace()

decodeFrame

protected int decodeFrame(int marker)
                   throws IOException

抛出:

IOException

calculateMCUs

protected void calculateMCUs(int[] componentIndexes,
                             Component[] components)

decodeScan

protected int decodeScan(int marker)
                  throws IOException

Decode baseline and sequencal scan

返回:

抛出:

IOException

decodeProgressiveScan

protected int decodeProgressiveScan(int marker)
                             throws IOException

Decode progressive scan

返回:

抛出:

IOException

validateProgressiveParam

protected void validateProgressiveParam()

isSOFnMarker

protected boolean isSOFnMarker(int marker)

can opt using array

参数:

marker -

返回:

readTables

protected void readTables(int marker)
                   throws IOException,
                          JPEGMarkerException

抛出:

IOException

JPEGMarkerException

decodeDNL

protected void decodeDNL()
                  throws IOException

抛出:

IOException

decodeDRI

protected void decodeDRI()
                  throws IOException

抛出:

IOException

decodeHuffmanTable

protected void decodeHuffmanTable()
                           throws IOException

抛出:

IOException

decodeQuantizationTable

protected void decodeQuantizationTable()
                                throws IOException

抛出:

IOException

decodeDAC

protected void decodeDAC()
                  throws IOException

抛出:

IOException

decodeExtendMarker

protected void decodeExtendMarker(int marker)
                           throws IOException

抛出:

IOException

determinColorspace

protected void determinColorspace()

readFrameHeader

protected void readFrameHeader(int marker)
                        throws IOException

抛出:

IOException

createFrameHeader

protected void createFrameHeader(boolean baseline,
                                 boolean progressive)
                          throws IOException

抛出:

IOException

inverseDCT

protected void inverseDCT()

writeFull

protected void writeFull()

Used by progressive mode

writeMCU

protected void writeMCU()

resetDecoder

protected void resetDecoder()

nextMarker

protected int nextMarker()
                  throws IOException

抛出:

IOException

readScanHeader

protected int[] readScanHeader()
                        throws IOException

抛出:

IOException

getQuality

public int getQuality()

decodeACRefine

protected int decodeACRefine(HuffmanTable huffTable,
                             int Ss,
                             int Se,
                             int Al,
                             int[] mcu,
                             int blkIndex)
                      throws IOException,
                             JPEGMarkerException

参数:

huffTable -

Ss -

Se -

Al -

mcu -

返回:

抛出:

IOException

JPEGMarkerException

decodeDCRefine

protected int decodeDCRefine(int Al,
                             int[] mcu,
                             int blkIndex)
                      throws IOException,
                             JPEGMarkerException

抛出:

IOException

JPEGMarkerException

decodeACFirst

protected int decodeACFirst(HuffmanTable huffTable,
                            int Ss,
                            int Se,
                            int Al,
                            int[] mcu,
                            int blkIndex)
                     throws IOException,
                            JPEGMarkerException

抛出:

IOException

JPEGMarkerException

decodeDCFirst

protected int decodeDCFirst(int index,
                            HuffmanTable huffTable,
                            int Al,
                            int[] mcu,
                            int blkIndex)
                     throws IOException,
                            JPEGMarkerException

抛出:

IOException

JPEGMarkerException

getExtendImageHeader

public ExtendImageHeader getExtendImageHeader()