From 26606c71c8a5c3a79f9e371e1c0ddfcb800b77df Mon Sep 17 00:00:00 2001
From: Francois-Olivier Devaux <fodevaux@users.noreply.github.com>
Date: Mon, 10 Dec 2007 13:16:01 +0000
Subject: First import of JAVAOpenJPEG, a Java wrapper of OpenJPEG, developed
 by Patrick Piscaglia of Telemis (www.telemis.com). Thank you Patrick for this
 new module !

---
 .../org/openJpeg/OpenJPEGJavaDecoder.java          | 230 +++++++++++++++++++++
 1 file changed, 230 insertions(+)
 create mode 100644 JavaOpenJPEG/java sources/org/openJpeg/OpenJPEGJavaDecoder.java

(limited to 'JavaOpenJPEG/java sources/org/openJpeg/OpenJPEGJavaDecoder.java')

diff --git a/JavaOpenJPEG/java sources/org/openJpeg/OpenJPEGJavaDecoder.java b/JavaOpenJPEG/java sources/org/openJpeg/OpenJPEGJavaDecoder.java
new file mode 100644
index 00000000..f976c27c
--- /dev/null
+++ b/JavaOpenJPEG/java sources/org/openJpeg/OpenJPEGJavaDecoder.java	
@@ -0,0 +1,230 @@
+/* 
+ * $Id: $ 
+ * 
+ * Copyright (c) 1999-2007 Telemis SA. All Rights Reserved 
+
+ * Author: Patrick Piscaglia, Telemis s.a.
+*/ 
+package org.openJpeg;
+
+import java.util.Vector;
+
+/** This class decodes one J2K codestream into an image (width + height + depth + pixels[], 
+ * using the OpenJPEG.org library.
+ * To be able to log messages, the called must register a IJavaJ2KDecoderLogger object.
+ */
+public class OpenJPEGJavaDecoder {
+
+	public interface IJavaJ2KDecoderLogger {
+		public void logDecoderMessage(String message);
+		public void logDecoderError(String message);
+	}
+	
+    private static boolean isInitialized = false;
+    
+	// ===== decompression parameters =============>
+	// These value may be changed for each image
+    private String[] decoder_arguments = null;
+	/** number of resolutions decompositions */
+	private int nbResolutions = -1;
+	/** the quality layers */
+	private int[] layers = null;
+
+	/** Contains the 8 bpp version of the image. May NOT be filled together with image16 or image24.<P>
+	 * We store in Java the 8 or 16 bpp version of the image while the decoder uses a 32 bpp version, because <UL>
+	 * <LI> the storage capacity required is smaller
+	 * <LI> the transfer Java <-- C will be faster
+	 * <LI> the conversion byte/short ==> int will be done faster by the C
+	 * </UL>*/
+	private byte[] image8 = null;
+	/** Contains the 16 bpp version of the image. May NOT be filled together with image8 or image24*/
+	private short[] image16 = null;
+	/** Contains the 24 bpp version of the image. May NOT be filled together with image8 or image16 */
+	private int[] image24 = null;
+	/** Holds the J2K compressed bytecode to decode */
+    private byte compressedStream[] = null;
+    /** Holds the compressed version of the index file, to be used by the decoder */
+    private byte compressedIndex[] = null;
+    /** Width and Height of the image */
+    private int width = -1;
+    private int height = -1;
+    private int depth = -1;
+    /** This parameter is never used in Java but is read by the C library to know the number of resolutions to skip when decoding, 
+     * i.e. if there are 5 resolutions and skipped=1 ==> decode until resolution 4.  */
+    private int skippedResolutions = 0;
+    
+    private Vector<IJavaJ2KDecoderLogger> loggers = new Vector();
+
+
+    public OpenJPEGJavaDecoder(String openJPEGlibraryFullPathAndName, IJavaJ2KDecoderLogger messagesAndErrorsLogger) throws ExceptionInInitializerError
+    {
+    	this(openJPEGlibraryFullPathAndName);
+    	loggers.addElement(messagesAndErrorsLogger);
+    }
+
+    public OpenJPEGJavaDecoder(String openJPEGlibraryFullPathAndName) throws ExceptionInInitializerError
+    {
+    	if (!isInitialized) {
+    		try {
+    			System.load(openJPEGlibraryFullPathAndName);
+    			isInitialized = true;
+    		} catch (Throwable t) {
+    			throw new ExceptionInInitializerError("OpenJPEG Java Decoder: probably impossible to find the C library");
+    		}
+    	}
+    }
+    
+    public void addLogger(IJavaJ2KDecoderLogger messagesAndErrorsLogger) {
+    	loggers.addElement(messagesAndErrorsLogger);
+    }
+    
+    public void removeLogger(IJavaJ2KDecoderLogger messagesAndErrorsLogger) {
+    	loggers.removeElement(messagesAndErrorsLogger);
+    }
+    
+    public int  decodeJ2KtoImage() {
+		if ((image16 == null || (image16 != null && image16.length != width*height)) && (depth==-1 || depth==16)) {
+			image16 = new short[width*height];
+			logMessage("OpenJPEGJavaDecoder.decompressImage: image16 length = " + image16.length + " (" + width + " x " + height + ") ");
+		}
+		if ((image8 == null || (image8 != null && image8.length != width*height)) && (depth==-1 || depth==8)) {
+			image8 = new byte[width*height];
+			logMessage("OpenJPEGJavaDecoder.decompressImage: image8 length = " + image8.length + " (" + width + " x " + height + ") ");
+		}
+		if ((image24 == null || (image24 != null && image24.length != width*height)) && (depth==-1 || depth==24)) {
+			image24 = new int[width*height];
+			logMessage("OpenJPEGJavaDecoder.decompressImage: image24 length = " + image24.length + " (" + width + " x " + height + ") ");
+		}
+		
+		String[] arguments = new String[0 + (decoder_arguments != null ? decoder_arguments.length : 0)];
+		int offset = 0;
+		if (decoder_arguments != null) {
+			for (int i=0; i<decoder_arguments.length; i++) {
+				arguments[i+offset] = decoder_arguments[i];
+			}
+		}
+
+		return internalDecodeJ2KtoImage(arguments);
+    }
+    
+    /** 
+     * Decode the j2k stream given in the codestream byte[] and fills the image8, image16 or image24 array, according to the bit depth.
+     */
+    private native int internalDecodeJ2KtoImage(String[] parameters);
+
+    /** Image depth in bpp */
+	public int getDepth() {
+		return depth;
+	}
+
+    /** Image depth in bpp */
+	public void setDepth(int depth) {
+		this.depth = depth;
+	}
+
+	/** Image height in pixels */
+	public int getHeight() {
+		return height;
+	}
+
+	/** Image height in pixels */
+	public void setHeight(int height) {
+		this.height = height;
+	}
+
+	/** Number of resolutions contained in the image */
+	public int getNbResolutions() {
+		return nbResolutions;
+	}
+
+	/** Number of resolutions contained in the image */
+	public void setNbResolutions(int nbResolutions) {
+		this.nbResolutions = nbResolutions;
+	}
+
+	/** Width of the image in pixels */
+	public int getWidth() {
+		return width;
+	}
+
+	/** Width of the image in pixels */
+	public void setWidth(int width) {
+		this.width = width;
+	}
+
+	/** Contains the decompressed version of the image, if the depth in is [9,16] bpp.
+	 * Returns NULL otherwise.
+	 */
+	public short[] getImage16() {
+		return image16;
+	}
+
+	/** Contains the decompressed version of the image, if the depth in is [17,24] bpp and the image is in color.
+	 * Returns NULL otherwise.
+	 */
+	public int[] getImage24() {
+		return image24;
+	}
+
+	/** Contains the decompressed version of the image, if the depth in is [1,8] bpp.
+	 * Returns NULL otherwise.
+	 */
+	public byte[] getImage8() {
+		return image8;
+	}
+
+	/** Sets the compressed version of the index file for this image.
+	 * This index file is used by the decompressor
+	 */
+	public void setCompressedIndex(byte[] compressedIndex) {
+		this.compressedIndex = compressedIndex;
+	}
+
+	/** Sets the codestream to be decoded */
+	public void setCompressedStream(byte[] compressedStream) {
+		this.compressedStream = compressedStream;
+	}
+
+	/** @return the compressed code stream length, or -1 if not defined */
+	public long getCodestreamLength() {
+		if (compressedStream == null)
+			return -1;
+		else return compressedStream.length;
+	}
+	
+	/** This method is called either directly or by the C methods */
+	public void logMessage(String message) {
+		for (IJavaJ2KDecoderLogger logger:loggers)
+			logger.logDecoderMessage(message);
+	}
+	
+	/** This method is called either directly or by the C methods */
+	public void logError(String error) {
+		for (IJavaJ2KDecoderLogger logger:loggers)
+			logger.logDecoderError(error);
+	}
+
+	public void reset() {
+		nbResolutions = -1;
+		layers = null;
+		image8 = null;
+		image16 = null;
+		image24 = null;
+		compressedStream = null;
+	    compressedIndex = null;
+	    width = -1;
+	    height = -1;
+	    depth = -1;
+	}
+
+	public void setSkippedResolutions(int numberOfSkippedResolutions) {
+		skippedResolutions = numberOfSkippedResolutions;
+	}
+
+	/** Contains all the decoding arguments other than the input/output file */
+	public void setDecoderArguments(String[] argumentsForTheDecoder) {
+		decoder_arguments = argumentsForTheDecoder;
+	}
+
+
+}
-- 
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