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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.*;
import org.libjpegturbo.turbojpeg.*;
public class TJExample {
public static final String classname=new TJExample().getClass().getName();
private static void usage() {
System.out.println("\nUSAGE: java "+classname+" <Input file> <Output file> [options]\n");
System.out.println("Options:\n");
System.out.println("-scale 1/N = scale the width/height of the output image by a factor of 1/N");
System.out.println(" (N = 1, 2, 4, or 8}\n");
System.exit(1);
}
public static void main(String argv[]) {
try {
if(argv.length<2) {
usage();
}
int scalefactor=1;
if(argv.length>2) {
for(int i=2; i<argv.length; i++) {
if(argv[i].equalsIgnoreCase("-scale") && i<argv.length-1) {
String [] scalearg=argv[++i].split("/");
if(scalearg.length!=2 || Integer.parseInt(scalearg[0])!=1
|| (scalefactor=Integer.parseInt(scalearg[1]))<1
|| scalefactor>8 || (scalefactor&(scalefactor-1))!=0)
usage();
}
}
}
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(inputbuf);
int width=tjd.getWidth();
int height=tjd.getHeight();
int subsamp=tjd.getSubsamp();
System.out.print("Source Image: "+width+" x "+height+" pixels, ");
switch(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;
}
if(scalefactor!=1) {
width=(width+scalefactor-1)/scalefactor;
height=(height+scalefactor-1)/scalefactor;
System.out.println("Dest. Image: "+width+" x "+height
+" pixels");
}
byte [] tmpbuf=tjd.decompress(width, 0, height, TJ.BGR, TJ.BOTTOMUP);
tjd.close();
TJCompressor tjc=new TJCompressor(tmpbuf, width, 0, height, TJ.BGR);
byte [] outputbuf=new byte[(int)TJ.bufSize(width, height)];
long outputsize=tjc.compress(outputbuf, 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);
}
}
};
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