Overview Package Class Use Source Tree Index Deprecated About
Prev Class | Next ClassFrames | No Frames
Summary: Nested | Field | Method | ConstrDetail: Nested | Field | Method | Constr

gnu.javax.imageio.jpeg

Class JPEGImageInputStream

Implemented Interfaces:
DataInput, ImageInputStream
public class JPEGImageInputStream
extends ImageInputStreamImpl

Field Summary

Fields inherited from class javax.imageio.stream.ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructor Summary

JPEGImageInputStream(ImageInputStream in)

Method Summary

byte
findNextMarker()
This method skips over the the data and finds the next position in the bit sequence with a X'FF' X'?
byte
getMarker()
This returns the marker that was last encountered.
int
read()
int
read(byte[] data, int offset, int len)
int
readBit()
Removes a bit from the buffer.

Methods inherited from class javax.imageio.stream.ImageInputStreamImpl

checkClosed, close, finalize, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, length, mark, read, read, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUTF, readUnsignedByte, readUnsignedInt, readUnsignedShort, reset, seek, setBitOffset, setByteOrder, skipBytes, skipBytes

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JPEGImageInputStream

public JPEGImageInputStream(ImageInputStream in)

Method Details

findNextMarker

public byte findNextMarker()
            throws IOException
This method skips over the the data and finds the next position in the bit sequence with a X'FF' X'??' sequence. Multiple X'FF bytes in sequence are considered padding and interpreted as one X'FF byte.
Returns:
the next marker byte in the stream
Throws:
IOException - if the end of the stream is reached unexpectedly

getMarker

public byte getMarker()
This returns the marker that was last encountered. This should only be used if removeBit() throws a MarkerTagFound exception.
Returns:
marker as byte

read

public int read()
            throws IOException
Specified by:
read in interface ImageInputStream
Overrides:
read in interface ImageInputStreamImpl

read

public int read(byte[] data,
                int offset,
                int len)
            throws IOException
Specified by:
read in interface ImageInputStream
Overrides:
read in interface ImageInputStreamImpl

readBit

public int readBit()
            throws IOException,
                   JPEGMarkerFoundException
Removes a bit from the buffer. (Removes from the top of a queue). This also checks for markers and throws MarkerTagFound exception if it does. If MarkerTagFound is thrown you can use getMarker() method to get the marker that caused the throw.
Specified by:
readBit in interface ImageInputStream
Overrides:
readBit in interface ImageInputStreamImpl
Parameters:
Returns:
the amount of bits specified by l as an integer
Throws:
IOException - TODO
JPEGMarkerFoundException -
JPEGImageInputStream.java -- Copyright (C) 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

Overview Package Class Use Source Tree Index Deprecated About