001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2013
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.imageio.plugins.dcm;
040
041import java.io.IOException;
042import java.util.Locale;
043
044import javax.imageio.ImageReader;
045import javax.imageio.spi.ImageReaderSpi;
046import javax.imageio.stream.ImageInputStream;
047
048import org.dcm4che3.data.Implementation;
049
050/**
051 * @author Gunter Zeilinger <gunterze@gmail.com>
052 *
053 */
054public class DicomImageReaderSpi extends ImageReaderSpi {
055
056    private static final String vendorName = "org.dcm4che";
057    private static final String version = Implementation.getVersionName();
058    private static final String[] formatNames = { "dicom", "DICOM" };
059    private static final String[] suffixes = { "dcm", "dic", "dicm", "dicom" };
060    private static final String[] MIMETypes = { "application/dicom" };
061    private static final Class<?>[] inputTypes = { ImageInputStream.class, DicomMetaData.class };
062
063    public DicomImageReaderSpi() {
064        super(vendorName, version, formatNames, suffixes, MIMETypes, 
065                DicomImageReader.class.getName(), inputTypes,
066                null,  // writerSpiNames
067                false, // supportsStandardStreamMetadataFormat
068                null,  // nativeStreamMetadataFormatName
069                null,  // nativeStreamMetadataFormatClassName
070                null,  // extraStreamMetadataFormatNames
071                null,  // extraStreamMetadataFormatClassNames
072                false, // supportsStandardImageMetadataFormat
073                null,  // nativeImageMetadataFormatName
074                null,  // nativeImageMetadataFormatClassName
075                null,  // extraImageMetadataFormatNames
076                null); // extraImageMetadataFormatClassNames
077    }
078
079    @Override
080    public String getDescription(Locale locale) {
081        return "DICOM Image Reader";
082    }
083
084    @Override
085    public boolean canDecodeInput(Object source) throws IOException {
086        ImageInputStream iis = (ImageInputStream) source;
087        iis.mark();
088        try {
089            int tag = iis.read()
090                   | (iis.read()<<8)
091                   | (iis.read()<<16)
092                   | (iis.read()<<24);
093            return ((tag >= 0x00080000 && tag <= 0x00080016)
094                  || (iis.skipBytes(124) == 124
095                   && iis.read() == 'D'
096                   && iis.read() == 'I'
097                   && iis.read() == 'C'
098                   && iis.read() == 'M'));
099        } finally {
100            iis.reset();
101        }
102    }
103
104    @Override
105    public ImageReader createReaderInstance(Object extension)
106            throws IOException {
107        return new DicomImageReader(this);
108    }
109
110}