*/
import java.io.*;
+import java.awt.image.*;
+import javax.imageio.*;
import org.libjpegturbo.turbojpeg.*;
public class TJExample {
- public static final String classname=new TJExample().getClass().getName();
+ 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("\nUSAGE: java " + classname + " <Input file> <Output file> [options]\n");
+ System.out.println("Input and output files can be any image format that the Java Image I/O");
+ System.out.println("extensions understand. If either filename ends in a .jpg extension, then");
+ System.out.println("TurboJPEG will be used to compress or decompress the file.\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.out.println("-scale 1/N = if the input image is a JPEG file, scale the width/height of the");
+ System.out.println(" output image by a factor of 1/N (N = 1, 2, 4, or 8}\n");
+ System.out.println("-samp <444|422|420|gray> = If the output image is a JPEG file, this specifies");
+ System.out.println(" the level of chrominance subsampling to use when");
+ System.out.println(" recompressing it. Default is to use the same level");
+ System.out.println(" of subsampling as the input, if the input is a JPEG");
+ System.out.println(" file, or 4:4:4 otherwise.\n");
+ System.out.println("-q <1-100> = If the output image is a JPEG file, this specifies the JPEG");
+ System.out.println(" quality to use when recompressing it (default = 95).\n");
System.exit(1);
}
+ private final static String sampName[] = {
+ "4:4:4", "4:2:2", "4:2:0", "Grayscale"
+ };
+
public static void main(String argv[]) {
+ BufferedImage img = null; byte [] bmpBuf = null;
+
try {
- if(argv.length<2) {
+ 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();
+ int scaleFactor = 1;
+ String inFormat = "jpg", outFormat = "jpg";
+ int outSubsamp = -1, outQual = 95;
+
+ if(argv.length > 2) {
+ for(int i = 2; i < argv.length; i++) {
+ if(argv[i].length() < 2) continue;
+ if(argv[i].length() > 2
+ && argv[i].substring(0, 3).equalsIgnoreCase("-sc")) {
+ if(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();
+ }
+ else usage();
+ }
+ if(argv[i].substring(0, 2).equalsIgnoreCase("-h")
+ || argv[i].equalsIgnoreCase("-?"))
+ usage();
+ if(argv[i].length() > 2
+ && argv[i].substring(0, 3).equalsIgnoreCase("-sa")) {
+ if(i < argv.length - 1) {
+ i++;
+ if(argv[i].substring(0, 1).equalsIgnoreCase("g"))
+ outSubsamp = TJ.SAMP_GRAY;
+ else if(argv[i].equals("444")) outSubsamp = TJ.SAMP_444;
+ else if(argv[i].equals("422")) outSubsamp = TJ.SAMP_422;
+ else if(argv[i].equals("420")) outSubsamp = TJ.SAMP_420;
+ else usage();
+ }
+ else usage();
+ }
+ if(argv[i].substring(0, 2).equalsIgnoreCase("-q")) {
+ if(i < argv.length - 1) {
+ int qual = Integer.parseInt(argv[++i]);
+ if(qual >= 1 && qual <= 100) outQual = qual;
+ else usage();
+ }
+ else usage();
}
}
}
+ String [] inFileTokens = argv[0].split("\\.");
+ if(inFileTokens.length > 1)
+ inFormat = inFileTokens[inFileTokens.length - 1];
+ String [] outFileTokens = argv[1].split("\\.");
+ if(outFileTokens.length > 1)
+ outFormat = outFileTokens[outFileTokens.length - 1];
+
+ File file = new File(argv[0]);
+ int width, height, subsamp = TJ.SAMP_444;
+
+ if(inFormat.equalsIgnoreCase("jpg")) {
+ 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);
+ width = tjd.getWidth();
+ height = tjd.getHeight();
+ int inSubsamp = tjd.getSubsamp();
+ System.out.println("Source Image: " + width + " x " + height
+ + " pixels, " + sampName[inSubsamp] + " subsampling");
+ if(outSubsamp < 0) outSubsamp = inSubsamp;
+
+ if(scaleFactor != 1) {
+ width = (width + scaleFactor - 1)/scaleFactor;
+ height = (height + scaleFactor - 1)/scaleFactor;
+ }
- 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);
+ if(!outFormat.equalsIgnoreCase("jpg")) {
+ img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+ tjd.decompress(img, 0);
+ }
+ else bmpBuf = tjd.decompress(width, 0, height, TJ.PF_BGRX, 0);
+ tjd.close();
}
- 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.SAMP_444: System.out.println("4:4:4 subsampling"); break;
- case TJ.SAMP_422: System.out.println("4:2:2 subsampling"); break;
- case TJ.SAMP_420: System.out.println("4:2:0 subsampling"); break;
- case TJ.SAMP_GRAY: System.out.println("Grayscale"); break;
- default: System.out.println("Unknown subsampling"); break;
+ else {
+ img = ImageIO.read(file);
+ width = img.getWidth();
+ height = img.getHeight();
+ if(outSubsamp < 0) {
+ if(img.getType() == BufferedImage.TYPE_BYTE_GRAY)
+ outSubsamp = TJ.SAMP_GRAY;
+ else outSubsamp = TJ.SAMP_444;
+ }
}
+ System.out.print("Dest. Image (" + outFormat + "): " + width + " x "
+ + height + " pixels");
+
+ if(outFormat.equalsIgnoreCase("jpg")) {
+ System.out.println(", " + sampName[outSubsamp]
+ + " subsampling, quality = " + outQual);
+ TJCompressor tjc = new TJCompressor();
+ int jpegSize;
+ byte [] jpegBuf = new byte[TJ.bufSize(width, height)];
+
+ if(img != null)
+ jpegSize = tjc.compress(img, jpegBuf, outSubsamp, outQual, 0);
+ else {
+ tjc.setBitmapBuffer(bmpBuf, width, 0, height, TJ.PF_BGRX);
+ jpegSize = tjc.compress(jpegBuf, outSubsamp, outQual, 0);
+ }
+ tjc.close();
- if(scalefactor!=1) {
- width=(width+scalefactor-1)/scalefactor;
- height=(height+scalefactor-1)/scalefactor;
- System.out.println("Dest. Image: "+width+" x "+height
- +" pixels");
+ file = new File(argv[1]);
+ FileOutputStream fos = new FileOutputStream(file);
+ fos.write(jpegBuf, 0, jpegSize);
+ fos.close();
+ }
+ else {
+ file = new File(argv[1]);
+ ImageIO.write(img, outFormat, file);
}
-
- byte [] tmpbuf=tjd.decompress(width, 0, height, TJ.PF_BGR, TJ.BOTTOMUP);
- tjd.close();
-
- TJCompressor tjc=new TJCompressor(tmpbuf, width, 0, height, TJ.PF_BGR);
- byte [] outputbuf=new byte[TJ.bufSize(width, height)];
- int outputsize=tjc.compress(outputbuf, subsamp, 95, TJ.BOTTOMUP);
- tjc.close();
-
- file=new File(argv[1]);
- FileOutputStream fos=new FileOutputStream(file);
- fos.write(outputbuf, 0, outputsize);
- fos.close();
} catch(Exception e) {
System.out.println(e);
projects / libjpeg-turbo / commitdiff