org.monte.media.jmf.jpeg.MJPGImageReaderSpi Maven / Gradle / Ivy
/*
* @(#)MJPGImageReaderSpi.java
*
* Copyright (c) 2010-2011 Werner Randelshofer, Goldau, Switzerland.
* All rights reserved.
*
* You may not use, copy or modify this file, except in compliance with the
* license agreement you entered into with Werner Randelshofer.
* For details see accompanying license terms.
*/
package org.monte.media.jmf.jpeg;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import javax.imageio.ImageReader;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
/**
* ImageIO service provider interface for images in the Motion JPEG (MJPG)
* format.
*
* The reader described by this class can read Motion JPEG files with omitted
* Huffmann table.
*
* For more information see:
* Microsoft Windows Bitmap Format.
* Multimedia Technical Note: JPEG DIB Format.
* (c) 1993 Microsoft Corporation. All rights reserved.
* BMPDIB.txt
*
* @author Werner Randelshofer
* @version $Id: MJPGImageReaderSpi.java 140 2011-12-31 14:33:52Z werner $
*/
public class MJPGImageReaderSpi extends ImageReaderSpi {
public MJPGImageReaderSpi() {
super("Werner Randelshofer",//vendor name
"1.0",//version
new String[]{"MJPG"},//names
new String[]{"mjpg"},//suffixes,
new String[]{"image/mjpg"},// MIMETypes,
"org.monte.media.jmf.renderer.video.MJPGImageReader",// readerClassName,
new Class[]{ImageInputStream.class,InputStream.class,byte[].class,javax.media.Buffer.class},// inputTypes,
null,// writerSpiNames,
false,// supportsStandardStreamMetadataFormat,
null,// nativeStreamMetadataFormatName,
null,// nativeStreamMetadataFormatClassName,
null,// extraStreamMetadataFormatNames,
null,// extraStreamMetadataFormatClassNames,
false,// supportsStandardImageMetadataFormat,
null,// nativeImageMetadataFormatName,
null,// nativeImageMetadataFormatClassName,
null,// extraImageMetadataFormatNames,
null// extraImageMetadataFormatClassNames
);
}
@Override
public boolean canDecodeInput(Object source) throws IOException {
if (source instanceof ImageInputStream) {
ImageInputStream in = (ImageInputStream) source;
in.mark();
// Check if file starts with a JFIF SOI magic (0xffd8=-40)
if (in.readShort() != -40) {
in.reset();
return false;
}
in.reset();
return true;
}
return false;
}
@Override
public ImageReader createReaderInstance(Object extension) throws IOException {
return new MJPGImageReader(this);
}
@Override
public String getDescription(Locale locale) {
return "MJPG Image Reader";
}
}