/*
* #%L
* OME Bio-Formats package for reading and converting biological file formats.
* %%
* Copyright (C) 2005 - 2015 Open Microscopy Environment:
* - Board of Regents of the University of Wisconsin-Madison
* - Glencoe Software, Inc.
* - University of Dundee
* %%
* This program 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 of the
* License, or (at your option) any later version.
*
* This program 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 this program. If not, see
* <http://www.gnu.org/licenses/gpl-2.0.html>.
* #L%
*/
package loci.formats.in;
import java.io.IOException;
import java.util.ArrayList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import loci.common.RandomAccessInputStream;
import loci.formats.CoreMetadata;
import loci.formats.FormatException;
import loci.formats.FormatReader;
import loci.formats.FormatTools;
import loci.formats.MetadataTools;
import loci.formats.codec.JPEG2000BoxType;
import loci.formats.codec.JPEG2000Codec;
import loci.formats.codec.JPEG2000CodecOptions;
import loci.formats.meta.MetadataStore;
/**
* JPXReader is the file format reader for JPX (3D JPEG-2000) images.
*/
public class JPXReader extends FormatReader {
// -- Constants --
/** Logger for this class. */
private static final Logger LOGGER = LoggerFactory.getLogger(JPXReader.class);
// -- Fields --
/** The number of JPEG 2000 resolution levels the file has. */
private Integer resolutionLevels;
/** The color lookup table associated with this file. */
private int[][] lut;
private ArrayList<Long> pixelOffsets = new ArrayList<Long>();
private int lastSeries = -1;
private int lastPlane = -1;
private byte[] lastSeriesPlane;
// -- Constructor --
/** Constructs a new JPX Reader. */
public JPXReader() {
super("JPX", "jpx");
suffixSufficient = false;
domains = new String[] {FormatTools.GRAPHICS_DOMAIN};
}
// -- IFormatReader API methods --
/* @see loci.formats.IFormatReader#isThisType(RandomAccessInputStream) */
@Override
public boolean isThisType(RandomAccessInputStream stream) throws IOException {
final int blockLen = 8;
if (!FormatTools.validStream(stream, blockLen, false)) return false;
boolean validStart = (stream.readShort() & 0xffff) == 0xff4f;
if (!validStart) {
stream.skipBytes(2);
validStart = stream.readInt() == JPEG2000BoxType.SIGNATURE.getCode();
}
stream.seek(stream.length() - 2);
boolean validEnd = (stream.readShort() & 0xffff) == 0xffd9;
return validStart && validEnd;
}
/* @see loci.formats.IFormatReader#get8BitLookupTable() */
@Override
public byte[][] get8BitLookupTable() {
FormatTools.assertId(currentId, true, 1);
if (lut == null || FormatTools.getBytesPerPixel(getPixelType()) != 1) {
return null;
}
byte[][] byteLut = new byte[lut.length][lut[0].length];
for (int i=0; i<lut.length; i++) {
for (int j=0; j<lut[i].length; j++) {
byteLut[i][j] = (byte) (lut[i][j] & 0xff);
}
}
return byteLut;
}
/* @see loci.formats.IFormatReader#get16BitLookupTable() */
@Override
public short[][] get16BitLookupTable() {
FormatTools.assertId(currentId, true, 1);
if (lut == null || FormatTools.getBytesPerPixel(getPixelType()) != 2) {
return null;
}
short[][] shortLut = new short[lut.length][lut[0].length];
for (int i=0; i<lut.length; i++) {
for (int j=0; j<lut[i].length; j++) {
shortLut[i][j] = (short) (lut[i][j] & 0xffff);
}
}
return shortLut;
}
/* @see loci.formats.IFormatReader#close(boolean) */
@Override
public void close(boolean fileOnly) throws IOException {
super.close(fileOnly);
if (!fileOnly) {
resolutionLevels = null;
lut = null;
pixelOffsets.clear();
lastSeries = -1;
lastPlane = -1;
lastSeriesPlane = null;
}
}
/**
* @see loci.formats.IFormatReader#openBytes(int, byte[], int, int, int, int)
*/
@Override
public byte[] openBytes(int no, byte[] buf, int x, int y, int w, int h)
throws FormatException, IOException
{
FormatTools.checkPlaneParameters(this, no, buf.length, x, y, w, h);
if (lastSeries == getSeries() && lastPlane == no && lastSeriesPlane != null)
{
RandomAccessInputStream s = new RandomAccessInputStream(lastSeriesPlane);
readPlane(s, x, y, w, h, buf);
s.close();
return buf;
}
JPEG2000CodecOptions options = JPEG2000CodecOptions.getDefaultOptions();
options.interleaved = isInterleaved();
options.littleEndian = isLittleEndian();
if (resolutionLevels != null) {
options.resolution = Math.abs(getSeries() - resolutionLevels);
}
else if (getSeriesCount() > 1) {
options.resolution = getSeries();
}
in.seek(pixelOffsets.get(no));
lastSeriesPlane = new JPEG2000Codec().decompress(in, options);
RandomAccessInputStream s = new RandomAccessInputStream(lastSeriesPlane);
readPlane(s, x, y, w, h, buf);
s.close();
lastSeries = getSeries();
lastPlane = no;
return buf;
}
// -- Internal FormatReader API methods --
/* @see loci.formats.FormatReader#initFile(String) */
@Override
protected void initFile(String id) throws FormatException, IOException {
super.initFile(id);
in = new RandomAccessInputStream(id);
CoreMetadata ms0 = core.get(0);
JPEG2000MetadataParser metadataParser = new JPEG2000MetadataParser(in);
if (metadataParser.isRawCodestream()) {
LOGGER.info("Codestream is raw, using codestream dimensions.");
ms0.sizeX = metadataParser.getCodestreamSizeX();
ms0.sizeY = metadataParser.getCodestreamSizeY();
ms0.sizeC = metadataParser.getCodestreamSizeC();
ms0.pixelType = metadataParser.getCodestreamPixelType();
}
else {
LOGGER.info("Codestream is JP2 boxed, using header dimensions.");
ms0.sizeX = metadataParser.getHeaderSizeX();
ms0.sizeY = metadataParser.getHeaderSizeY();
ms0.sizeC = metadataParser.getHeaderSizeC();
ms0.pixelType = metadataParser.getHeaderPixelType();
}
lut = metadataParser.getLookupTable();
findPixelOffsets();
ms0.sizeZ = 1;
ms0.sizeT = pixelOffsets.size();
ms0.imageCount = getSizeZ() * getSizeT();
ms0.dimensionOrder = "XYCZT";
ms0.rgb = getSizeC() > 1;
ms0.interleaved = true;
ms0.littleEndian = false;
ms0.indexed = !isRGB() && lut != null;
// New core metadata now that we know how many sub-resolutions we have.
if (resolutionLevels != null) {
int seriesCount = resolutionLevels + 1;
for (int i = 1; i < seriesCount; i++) {
CoreMetadata ms = new CoreMetadata(this, 0);
core.add(ms);
ms.sizeX = core.get(i - 1).sizeX / 2;
ms.sizeY = core.get(i - 1).sizeY / 2;
ms.thumbnail = true;
}
}
MetadataStore store = makeFilterMetadata();
MetadataTools.populatePixels(store, this, true);
}
// -- Helper methods --
private void findPixelOffsets() throws IOException {
in.seek(0);
byte[] buf = new byte[8192];
int overlap = 3;
in.read(buf, 0, overlap);
while (in.getFilePointer() < in.length()) {
int n = in.read(buf, overlap, buf.length - overlap);
for (int i=0; i<n - overlap; i++) {
if (buf[i] == (byte) 0xff) {
if (buf[i + 1] == (byte) 0x4f && buf[i + 2] == (byte) 0xff &&
buf[i + 3] == (byte) 0x51)
{
pixelOffsets.add(in.getFilePointer() - n + i - overlap);
}
}
}
System.arraycopy(buf, n - overlap, buf, 0, overlap);
}
}
}