java/TJDecomp.java - third_party/libjpeg-turbo.git - Git at Google

 /*
  * Copyright (C)2011-2012, 2014-2015, 2017-2018, 2022-2024 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 use the TurboJPEG C API to approximate the
  * functionality of the IJG's djpeg program.  djpeg features that are not
  * covered:
  *
  * - OS/2 BMP, GIF, and Targa output file formats [legacy feature]
  * - Color quantization and dithering [legacy feature]
  * - The floating-point IDCT method [legacy feature]
  * - Extracting an ICC color management profile
  * - Progress reporting
  * - Skipping rows (i.e. exclusive rather than inclusive partial decompression)
  * - Debug output
  */

 import java.io.*;
 import java.util.*;
 import org.libjpegturbo.turbojpeg.*;


 @SuppressWarnings("checkstyle:JavadocType")
 final class TJDecomp {

   private TJDecomp() {}

   static final String CLASS_NAME =
     new TJDecomp().getClass().getName();


   private static boolean isCropped(java.awt.Rectangle cr) {
     return (cr.x != 0 || cr.y != 0 || cr.width != 0 || cr.height != 0);
   }


   private static String tjErrorMsg;
   private static int tjErrorCode = -1;

   static void handleTJException(TJException e, int stopOnWarning)
                                 throws TJException {
     String errorMsg = e.getMessage();
     int errorCode = e.getErrorCode();

     if (stopOnWarning != 1 && errorCode == TJ.ERR_WARNING) {
       if (tjErrorMsg == null || !tjErrorMsg.equals(errorMsg) ||
           tjErrorCode != errorCode) {
         tjErrorMsg = errorMsg;
         tjErrorCode = errorCode;
         System.out.println("WARNING: " + errorMsg);
       }
     } else
       throw e;
   }


   static void usage() {
     int i;
     TJScalingFactor[] scalingFactors = TJ.getScalingFactors();
     int numScalingFactors = scalingFactors.length;

     System.out.println("\nUSAGE: java [Java options] " + CLASS_NAME +
                        " [options] <JPEG image> <Output image>\n");

     System.out.println("The output image will be in Windows BMP or PBMPLUS (PPM/PGM) format, depending");
     System.out.println("on the file extension.\n");

     System.out.println("GENERAL OPTIONS (CAN BE ABBREVBIATED)");
     System.out.println("-------------------------------------");
     System.out.println("-icc FILE");
     System.out.println("    Extract the ICC (International Color Consortium) color profile from the");
     System.out.println("    JPEG image to the specified file");
     System.out.println("-strict");
     System.out.println("    Treat all warnings as fatal; abort immediately if incomplete or corrupt");
     System.out.println("    data is encountered in the JPEG image, rather than trying to salvage the");
     System.out.println("    rest of the image\n");

     System.out.println("LOSSY JPEG OPTIONS (CAN BE ABBREVIATED)");
     System.out.println("---------------------------------------");
     System.out.println("-crop WxH+X+Y");
     System.out.println("    Decompress only the specified region of the JPEG image.  (W, H, X, and Y");
     System.out.println("    are the width, height, left boundary, and upper boundary of the region, all");
     System.out.println("    specified relative to the scaled image dimensions.)  If necessary, X will");
     System.out.println("    be shifted left to the nearest iMCU boundary, and W will be increased");
     System.out.println("    accordingly.");
     System.out.println("-dct fast");
     System.out.println("    Use less accurate IDCT algorithm [legacy feature]");
     System.out.println("-dct int");
     System.out.println("    Use more accurate IDCT algorithm [default]");
     System.out.println("-grayscale");
     System.out.println("    Decompress a full-color JPEG image into a grayscale output image");
     System.out.println("-maxmemory N");
     System.out.println("    Memory limit (in megabytes) for intermediate buffers used with progressive");
     System.out.println("    JPEG decompression [default = no limit]");
     System.out.println("-maxscans N");
     System.out.println("    Refuse to decompress progressive JPEG images that have more than N scans");
     System.out.println("-nosmooth");
     System.out.println("    Use the fastest chrominance upsampling algorithm available");
     System.out.println("-rgb");
     System.out.println("    Decompress a grayscale JPEG image into a full-color output image");
     System.out.println("-scale M/N");
     System.out.println("    Scale the width/height of the JPEG image by a factor of M/N when");
     System.out.print("    decompressing it (M/N = ");
     for (i = 0; i < numScalingFactors; i++) {
       System.out.format("%d/%d", scalingFactors[i].getNum(),
                         scalingFactors[i].getDenom());
       if (numScalingFactors == 2 && i != numScalingFactors - 1)
         System.out.print(" or ");
       else if (numScalingFactors > 2) {
         if (i != numScalingFactors - 1)
           System.out.print(", ");
         if (i == numScalingFactors - 2)
           System.out.print("or ");
       }
       if (i % 8 == 0 && i != 0) System.out.print("\n    ");
     }
     System.out.println(")\n");

     System.exit(1);
   }


   static boolean matchArg(String arg, String string, int minChars) {
     if (arg.length() > string.length() || arg.length() < minChars)
       return false;

     int cmpChars = Math.max(arg.length(), minChars);
     string = string.substring(0, cmpChars);

     return arg.equalsIgnoreCase(string);
   }


   public static void main(String[] argv) {
     int exitStatus = 0;
     TJDecompressor tjd = null;
     FileInputStream fis = null;
     FileOutputStream fos = null;

     try {

       int i;
       int colorspace, fastDCT = -1, fastUpsample = -1, maxMemory = -1,
         maxScans = -1, pixelFormat = TJ.PF_UNKNOWN, precision,
         stopOnWarning = -1, subsamp;
       java.awt.Rectangle croppingRegion = TJ.UNCROPPED;
       String iccFilename = null;
       TJScalingFactor scalingFactor = TJ.UNSCALED;
       int width, height;
       byte[] jpegBuf, iccBuf = null;
       Object dstBuf = null;

       for (i = 0; i < argv.length; i++) {
         if (matchArg(argv[i], "-crop", 2) && i < argv.length - 1) {
           int tempWidth = -1, tempHeight = -1, tempX = -1, tempY = -1;
           Scanner scanner = new Scanner(argv[++i]).useDelimiter("x|X|\\+");

           try {
             tempWidth = scanner.nextInt();
             tempHeight = scanner.nextInt();
             tempX = scanner.nextInt();
             tempY = scanner.nextInt();
           } catch (Exception e) {}

           if (tempWidth < 1 || tempHeight < 1 || tempX < 0 || tempY < 0)
             usage();
           croppingRegion.width = tempWidth;
           croppingRegion.height = tempHeight;
           croppingRegion.x = tempX;
           croppingRegion.y = tempY;
         } else if (matchArg(argv[i], "-dct", 2) && i < argv.length - 1) {
           i++;
           if (matchArg(argv[i], "fast", 1))
             fastDCT = 1;
           else if (!matchArg(argv[i], "int", 1))
             usage();
         } else if (matchArg(argv[i], "-grayscale", 2) ||
                    matchArg(argv[i], "-greyscale", 2))
           pixelFormat = TJ.PF_GRAY;
         else if (matchArg(argv[i], "-icc", 2) && i < argv.length - 1)
           iccFilename = argv[++i];
         else if (matchArg(argv[i], "-maxscans", 5) && i < argv.length - 1) {
           int temp = -1;

           try {
             temp = Integer.parseInt(argv[++i]);
           } catch (NumberFormatException e) {}
           if (temp < 0)
             usage();
           maxScans = temp;
         } else if (matchArg(argv[i], "-maxmemory", 2) && i < argv.length - 1) {
           int temp = -1;

           try {
             temp = Integer.parseInt(argv[++i]);
           } catch (NumberFormatException e) {}
           if (temp < 0)
             usage();
           maxMemory = temp;
         } else if (matchArg(argv[i], "-nosmooth", 2))
           fastUpsample = 1;
         else if (matchArg(argv[i], "-rgb", 2))
           pixelFormat = TJ.PF_RGB;
         else if (matchArg(argv[i], "-strict", 3))
           stopOnWarning = 1;
         else if (matchArg(argv[i], "-scale", 2) && i < argv.length - 1) {
           int tempNum = 0, tempDenom = 0;
           boolean match = false, scanned = true;
           Scanner scanner = new Scanner(argv[++i]).useDelimiter("/");

           try {
             tempNum = scanner.nextInt();
             tempDenom = scanner.nextInt();
           } catch (Exception e) {}

           if (tempNum < 1 || tempDenom < 1)
             usage();

           TJScalingFactor[] scalingFactors = TJ.getScalingFactors();
           for (int j = 0; j < scalingFactors.length; j++) {
             if ((double)tempNum / (double)tempDenom ==
                 (double)scalingFactors[j].getNum() /
                 (double)scalingFactors[j].getDenom()) {
               scalingFactor = scalingFactors[j];
               match = true;  break;
             }
           }
           if (!match) usage();
         } else break;
       }

       if (i != argv.length - 2)
         usage();

       tjd = new TJDecompressor();

       if (stopOnWarning >= 0)
         tjd.set(TJ.PARAM_STOPONWARNING, stopOnWarning);
       if (fastUpsample >= 0)
         tjd.set(TJ.PARAM_FASTUPSAMPLE, fastUpsample);
       if (fastDCT >= 0)
         tjd.set(TJ.PARAM_FASTDCT, fastDCT);
       if (maxScans >= 0)
         tjd.set(TJ.PARAM_SCANLIMIT, maxScans);
       if (maxMemory >= 0)
         tjd.set(TJ.PARAM_MAXMEMORY, maxMemory);

       File jpegFile = new File(argv[i++]);
       fis = new FileInputStream(jpegFile);
       int jpegSize = fis.available();
       if (jpegSize < 1)
         throw new Exception("Input file contains no data");
       jpegBuf = new byte[jpegSize];
       fis.read(jpegBuf);
       fis.close();  fis = null;

       try {
         tjd.setSourceImage(jpegBuf, jpegSize);
       } catch (TJException e) { handleTJException(e, stopOnWarning); }
       subsamp = tjd.get(TJ.PARAM_SUBSAMP);
       width = tjd.get(TJ.PARAM_JPEGWIDTH);
       height = tjd.get(TJ.PARAM_JPEGHEIGHT);
       precision = tjd.get(TJ.PARAM_PRECISION);
       colorspace = tjd.get(TJ.PARAM_COLORSPACE);

       if (iccFilename != null) {
         try {
           iccBuf = tjd.getICCProfile();
         } catch (TJException e) { handleTJException(e, stopOnWarning); }
         if (iccBuf != null) {
           File iccFile = new File(iccFilename);
           fos = new FileOutputStream(iccFile);
           fos.write(iccBuf, 0, iccBuf.length);
         }
       }

       if (pixelFormat == TJ.PF_UNKNOWN) {
         if (colorspace == TJ.CS_GRAY)
           pixelFormat = TJ.PF_GRAY;
         else if (colorspace == TJ.CS_CMYK || colorspace == TJ.CS_YCCK)
           pixelFormat = TJ.PF_CMYK;
         else
           pixelFormat = TJ.PF_RGB;
       }

       if (tjd.get(TJ.PARAM_LOSSLESS) == 0) {
         tjd.setScalingFactor(scalingFactor);
         width = scalingFactor.getScaled(width);
         height = scalingFactor.getScaled(height);

         if (isCropped(croppingRegion)) {
           int adjustment;

           if (subsamp == TJ.SAMP_UNKNOWN)
             throw new Exception("Could not determine subsampling level of JPEG image");
           adjustment = croppingRegion.x %
                        scalingFactor.getScaled(TJ.getMCUWidth(subsamp));
           croppingRegion.x -= adjustment;
           croppingRegion.width += adjustment;
           tjd.setCroppingRegion(croppingRegion);
           width = croppingRegion.width;
           height = croppingRegion.height;
         }
       }

       if (precision <= 8)
         dstBuf = new byte[width * height * TJ.getPixelSize(pixelFormat)];
       else
         dstBuf = new short[width * height * TJ.getPixelSize(pixelFormat)];

       try {
         if (precision <= 8)
           tjd.decompress8((byte[])dstBuf, 0, 0, 0, pixelFormat);
         else if (precision <= 12)
           tjd.decompress12((short[])dstBuf, 0, 0, 0, pixelFormat);
         else
           tjd.decompress16((short[])dstBuf, 0, 0, 0, pixelFormat);
       } catch (TJException e) { handleTJException(e, stopOnWarning); }

       tjd.saveImage(argv[i], dstBuf, 0, 0, width, 0, height, pixelFormat);
     } catch (Exception e) {
       e.printStackTrace();
       exitStatus = -1;
     }

     try {
       if (tjd != null) tjd.close();
       if (fis != null) fis.close();
       if (fos != null) fos.close();
     } catch (Exception e) {}
     System.exit(exitStatus);
   }
 };
	/*
	* Copyright (C)2011-2012, 2014-2015, 2017-2018, 2022-2024 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 use the TurboJPEG C API to approximate the
	* functionality of the IJG's djpeg program. djpeg features that are not
	* covered:
	*
	* - OS/2 BMP, GIF, and Targa output file formats [legacy feature]
	* - Color quantization and dithering [legacy feature]
	* - The floating-point IDCT method [legacy feature]
	* - Extracting an ICC color management profile
	* - Progress reporting
	* - Skipping rows (i.e. exclusive rather than inclusive partial decompression)
	* - Debug output
	*/

	import java.io.*;
	import java.util.*;
	import org.libjpegturbo.turbojpeg.*;


	@SuppressWarnings("checkstyle:JavadocType")
	final class TJDecomp {

	private TJDecomp() {}

	static final String CLASS_NAME =
	new TJDecomp().getClass().getName();


	private static boolean isCropped(java.awt.Rectangle cr) {
	return (cr.x != 0 \|\| cr.y != 0 \|\| cr.width != 0 \|\| cr.height != 0);
	}


	private static String tjErrorMsg;
	private static int tjErrorCode = -1;

	static void handleTJException(TJException e, int stopOnWarning)
	throws TJException {
	String errorMsg = e.getMessage();
	int errorCode = e.getErrorCode();

	if (stopOnWarning != 1 && errorCode == TJ.ERR_WARNING) {
	if (tjErrorMsg == null \|\| !tjErrorMsg.equals(errorMsg) \|\|
	tjErrorCode != errorCode) {
	tjErrorMsg = errorMsg;
	tjErrorCode = errorCode;
	System.out.println("WARNING: " + errorMsg);
	}
	} else
	throw e;
	}


	static void usage() {
	int i;
	TJScalingFactor[] scalingFactors = TJ.getScalingFactors();
	int numScalingFactors = scalingFactors.length;

	System.out.println("\nUSAGE: java [Java options] " + CLASS_NAME +
	" [options] <JPEG image> <Output image>\n");

	System.out.println("The output image will be in Windows BMP or PBMPLUS (PPM/PGM) format, depending");
	System.out.println("on the file extension.\n");

	System.out.println("GENERAL OPTIONS (CAN BE ABBREVBIATED)");
	System.out.println("-------------------------------------");
	System.out.println("-icc FILE");
	System.out.println(" Extract the ICC (International Color Consortium) color profile from the");
	System.out.println(" JPEG image to the specified file");
	System.out.println("-strict");
	System.out.println(" Treat all warnings as fatal; abort immediately if incomplete or corrupt");
	System.out.println(" data is encountered in the JPEG image, rather than trying to salvage the");
	System.out.println(" rest of the image\n");

	System.out.println("LOSSY JPEG OPTIONS (CAN BE ABBREVIATED)");
	System.out.println("---------------------------------------");
	System.out.println("-crop WxH+X+Y");
	System.out.println(" Decompress only the specified region of the JPEG image. (W, H, X, and Y");
	System.out.println(" are the width, height, left boundary, and upper boundary of the region, all");
	System.out.println(" specified relative to the scaled image dimensions.) If necessary, X will");
	System.out.println(" be shifted left to the nearest iMCU boundary, and W will be increased");
	System.out.println(" accordingly.");
	System.out.println("-dct fast");
	System.out.println(" Use less accurate IDCT algorithm [legacy feature]");
	System.out.println("-dct int");
	System.out.println(" Use more accurate IDCT algorithm [default]");
	System.out.println("-grayscale");
	System.out.println(" Decompress a full-color JPEG image into a grayscale output image");
	System.out.println("-maxmemory N");
	System.out.println(" Memory limit (in megabytes) for intermediate buffers used with progressive");
	System.out.println(" JPEG decompression [default = no limit]");
	System.out.println("-maxscans N");
	System.out.println(" Refuse to decompress progressive JPEG images that have more than N scans");
	System.out.println("-nosmooth");
	System.out.println(" Use the fastest chrominance upsampling algorithm available");
	System.out.println("-rgb");
	System.out.println(" Decompress a grayscale JPEG image into a full-color output image");
	System.out.println("-scale M/N");
	System.out.println(" Scale the width/height of the JPEG image by a factor of M/N when");
	System.out.print(" decompressing it (M/N = ");
	for (i = 0; i < numScalingFactors; i++) {
	System.out.format("%d/%d", scalingFactors[i].getNum(),
	scalingFactors[i].getDenom());
	if (numScalingFactors == 2 && i != numScalingFactors - 1)
	System.out.print(" or ");
	else if (numScalingFactors > 2) {
	if (i != numScalingFactors - 1)
	System.out.print(", ");
	if (i == numScalingFactors - 2)
	System.out.print("or ");
	}
	if (i % 8 == 0 && i != 0) System.out.print("\n ");
	}
	System.out.println(")\n");

	System.exit(1);
	}


	static boolean matchArg(String arg, String string, int minChars) {
	if (arg.length() > string.length() \|\| arg.length() < minChars)
	return false;

	int cmpChars = Math.max(arg.length(), minChars);
	string = string.substring(0, cmpChars);

	return arg.equalsIgnoreCase(string);
	}


	public static void main(String[] argv) {
	int exitStatus = 0;
	TJDecompressor tjd = null;
	FileInputStream fis = null;
	FileOutputStream fos = null;

	try {

	int i;
	int colorspace, fastDCT = -1, fastUpsample = -1, maxMemory = -1,
	maxScans = -1, pixelFormat = TJ.PF_UNKNOWN, precision,
	stopOnWarning = -1, subsamp;
	java.awt.Rectangle croppingRegion = TJ.UNCROPPED;
	String iccFilename = null;
	TJScalingFactor scalingFactor = TJ.UNSCALED;
	int width, height;
	byte[] jpegBuf, iccBuf = null;
	Object dstBuf = null;

	for (i = 0; i < argv.length; i++) {
	if (matchArg(argv[i], "-crop", 2) && i < argv.length - 1) {
	int tempWidth = -1, tempHeight = -1, tempX = -1, tempY = -1;
	Scanner scanner = new Scanner(argv[++i]).useDelimiter("x\|X\|\\+");

	try {
	tempWidth = scanner.nextInt();
	tempHeight = scanner.nextInt();
	tempX = scanner.nextInt();
	tempY = scanner.nextInt();
	} catch (Exception e) {}

	if (tempWidth < 1 \|\| tempHeight < 1 \|\| tempX < 0 \|\| tempY < 0)
	usage();
	croppingRegion.width = tempWidth;
	croppingRegion.height = tempHeight;
	croppingRegion.x = tempX;
	croppingRegion.y = tempY;
	} else if (matchArg(argv[i], "-dct", 2) && i < argv.length - 1) {
	i++;
	if (matchArg(argv[i], "fast", 1))
	fastDCT = 1;
	else if (!matchArg(argv[i], "int", 1))
	usage();
	} else if (matchArg(argv[i], "-grayscale", 2) \|\|
	matchArg(argv[i], "-greyscale", 2))
	pixelFormat = TJ.PF_GRAY;
	else if (matchArg(argv[i], "-icc", 2) && i < argv.length - 1)
	iccFilename = argv[++i];
	else if (matchArg(argv[i], "-maxscans", 5) && i < argv.length - 1) {
	int temp = -1;

	try {
	temp = Integer.parseInt(argv[++i]);
	} catch (NumberFormatException e) {}
	if (temp < 0)
	usage();
	maxScans = temp;
	} else if (matchArg(argv[i], "-maxmemory", 2) && i < argv.length - 1) {
	int temp = -1;

	try {
	temp = Integer.parseInt(argv[++i]);
	} catch (NumberFormatException e) {}
	if (temp < 0)
	usage();
	maxMemory = temp;
	} else if (matchArg(argv[i], "-nosmooth", 2))
	fastUpsample = 1;
	else if (matchArg(argv[i], "-rgb", 2))
	pixelFormat = TJ.PF_RGB;
	else if (matchArg(argv[i], "-strict", 3))
	stopOnWarning = 1;
	else if (matchArg(argv[i], "-scale", 2) && i < argv.length - 1) {
	int tempNum = 0, tempDenom = 0;
	boolean match = false, scanned = true;
	Scanner scanner = new Scanner(argv[++i]).useDelimiter("/");

	try {
	tempNum = scanner.nextInt();
	tempDenom = scanner.nextInt();
	} catch (Exception e) {}

	if (tempNum < 1 \|\| tempDenom < 1)
	usage();

	TJScalingFactor[] scalingFactors = TJ.getScalingFactors();
	for (int j = 0; j < scalingFactors.length; j++) {
	if ((double)tempNum / (double)tempDenom ==
	(double)scalingFactors[j].getNum() /
	(double)scalingFactors[j].getDenom()) {
	scalingFactor = scalingFactors[j];
	match = true; break;
	}
	}
	if (!match) usage();
	} else break;
	}

	if (i != argv.length - 2)
	usage();

	tjd = new TJDecompressor();

	if (stopOnWarning >= 0)
	tjd.set(TJ.PARAM_STOPONWARNING, stopOnWarning);
	if (fastUpsample >= 0)
	tjd.set(TJ.PARAM_FASTUPSAMPLE, fastUpsample);
	if (fastDCT >= 0)
	tjd.set(TJ.PARAM_FASTDCT, fastDCT);
	if (maxScans >= 0)
	tjd.set(TJ.PARAM_SCANLIMIT, maxScans);
	if (maxMemory >= 0)
	tjd.set(TJ.PARAM_MAXMEMORY, maxMemory);

	File jpegFile = new File(argv[i++]);
	fis = new FileInputStream(jpegFile);
	int jpegSize = fis.available();
	if (jpegSize < 1)
	throw new Exception("Input file contains no data");
	jpegBuf = new byte[jpegSize];
	fis.read(jpegBuf);
	fis.close(); fis = null;

	try {
	tjd.setSourceImage(jpegBuf, jpegSize);
	} catch (TJException e) { handleTJException(e, stopOnWarning); }
	subsamp = tjd.get(TJ.PARAM_SUBSAMP);
	width = tjd.get(TJ.PARAM_JPEGWIDTH);
	height = tjd.get(TJ.PARAM_JPEGHEIGHT);
	precision = tjd.get(TJ.PARAM_PRECISION);
	colorspace = tjd.get(TJ.PARAM_COLORSPACE);

	if (iccFilename != null) {
	try {
	iccBuf = tjd.getICCProfile();
	} catch (TJException e) { handleTJException(e, stopOnWarning); }
	if (iccBuf != null) {
	File iccFile = new File(iccFilename);
	fos = new FileOutputStream(iccFile);
	fos.write(iccBuf, 0, iccBuf.length);
	}
	}

	if (pixelFormat == TJ.PF_UNKNOWN) {
	if (colorspace == TJ.CS_GRAY)
	pixelFormat = TJ.PF_GRAY;
	else if (colorspace == TJ.CS_CMYK \|\| colorspace == TJ.CS_YCCK)
	pixelFormat = TJ.PF_CMYK;
	else
	pixelFormat = TJ.PF_RGB;
	}

	if (tjd.get(TJ.PARAM_LOSSLESS) == 0) {
	tjd.setScalingFactor(scalingFactor);
	width = scalingFactor.getScaled(width);
	height = scalingFactor.getScaled(height);

	if (isCropped(croppingRegion)) {
	int adjustment;

	if (subsamp == TJ.SAMP_UNKNOWN)
	throw new Exception("Could not determine subsampling level of JPEG image");
	adjustment = croppingRegion.x %
	scalingFactor.getScaled(TJ.getMCUWidth(subsamp));
	croppingRegion.x -= adjustment;
	croppingRegion.width += adjustment;
	tjd.setCroppingRegion(croppingRegion);
	width = croppingRegion.width;
	height = croppingRegion.height;
	}
	}

	if (precision <= 8)
	dstBuf = new byte[width * height * TJ.getPixelSize(pixelFormat)];
	else
	dstBuf = new short[width * height * TJ.getPixelSize(pixelFormat)];

	try {
	if (precision <= 8)
	tjd.decompress8((byte[])dstBuf, 0, 0, 0, pixelFormat);
	else if (precision <= 12)
	tjd.decompress12((short[])dstBuf, 0, 0, 0, pixelFormat);
	else
	tjd.decompress16((short[])dstBuf, 0, 0, 0, pixelFormat);
	} catch (TJException e) { handleTJException(e, stopOnWarning); }

	tjd.saveImage(argv[i], dstBuf, 0, 0, width, 0, height, pixelFormat);
	} catch (Exception e) {
	e.printStackTrace();
	exitStatus = -1;
	}

	try {
	if (tjd != null) tjd.close();
	if (fis != null) fis.close();
	if (fos != null) fos.close();
	} catch (Exception e) {}
	System.exit(exitStatus);
	}
	};