Add JNI wrapper for TurboJPEG/OSS
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@337 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/java/tjexample.java b/java/tjexample.java
new file mode 100644
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--- /dev/null
+++ b/java/tjexample.java
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+/*
+ * Copyright (C)2011 D. R. Commander. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of the libjpeg-turbo Project nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This program demonstrates how to compress and decompress JPEG files using
+ * the TurboJPEG JNI wrapper
+ */
+
+import java.io.*;
+
+public class tjexample {
+
+ public static final String classname=new tjexample().getClass().getName();
+
+ public static void main(String argv[]) {
+
+ try {
+
+ if(argv.length<2) {
+ System.out.println("USAGE: java "+classname+" <Input file> <Output file>");
+ System.exit(1);
+ }
+
+ File file=new File(argv[0]);
+ FileInputStream fis=new FileInputStream(file);
+ int inputsize=fis.available();
+ if(inputsize<1) {
+ System.out.println("Input file contains no data");
+ System.exit(1);
+ }
+ byte [] inputbuf=new byte[inputsize];
+ fis.read(inputbuf);
+ fis.close();
+
+ tjDecompressor tjd=new tjDecompressor();
+ tjHeaderInfo tji=tjd.DecompressHeader(inputbuf, inputsize);
+ System.out.print("Source Image: "+tji.width+" x "+tji.height+ " pixels, ");
+ switch(tji.subsamp) {
+ case TJ.SAMP444: System.out.println("4:4:4 subsampling"); break;
+ case TJ.SAMP422: System.out.println("4:2:2 subsampling"); break;
+ case TJ.SAMP420: System.out.println("4:2:0 subsampling"); break;
+ case TJ.GRAYSCALE: System.out.println("Grayscale"); break;
+ default: System.out.println("Unknown subsampling"); break;
+ }
+ byte [] tmpbuf=new byte[tji.width*tji.height*3];
+ tjd.Decompress(inputbuf, inputsize, tmpbuf, tji.width, tji.width*3,
+ tji.height, 3, TJ.BOTTOMUP);
+ tjd.close();
+
+ tjCompressor tjc=new tjCompressor();
+ byte [] outputbuf=new byte[(int)TJ.BUFSIZE(tji.width, tji.height)];
+ long outputsize=tjc.Compress(tmpbuf, tji.width, tji.width*3, tji.height,
+ 3, outputbuf, tji.subsamp, 95, TJ.BOTTOMUP);
+ tjc.close();
+
+ file=new File(argv[1]);
+ FileOutputStream fos=new FileOutputStream(file);
+ fos.write(outputbuf, 0, (int)outputsize);
+ fos.close();
+
+ } catch(Exception e) {
+ System.out.println(e);
+ }
+ }
+
+};