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Implement lossless cropping interface in Java

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@501 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2011-03-04 10:13:59 +00:00
parent 46531c3265
commit e85730157e
6 changed files with 337 additions and 10 deletions
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62
java/TJExample.java
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@@ -64,6 +64,18 @@ public class TJExample {
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.out.println("-hflip, -vflip, -transpose, -transverse, -rot90, -rot180, -rot270 =");
System.out.println(" If the input image is a JPEG file, perform the corresponding lossless");
System.out.println(" transform prior to decompression (these options are mutually exclusive)\n");
System.out.println("-grayscale = If the input image is a JPEG file, perform lossless grayscale");
System.out.println(" conversion prior to decompression (can be combined with the other");
System.out.println(" transforms above)\n");
System.out.println("-crop X,Y,WxH = If the input image is a JPEG file, perform lossless cropping");
System.out.println(" prior to decompression. X,Y specifies the upper left corner of the");
System.out.println(" cropping region, and WxH specifies its width and height. X,Y must be");
System.out.println(" evenly divible by the MCU block size (8x8 if the source image was");
System.out.println(" compressed using no subsampling or grayscale, or 16x8 for 4:2:2 or 16x16");
System.out.println(" for 4:2:0.)\n");
System.exit(1);
}
@@ -74,6 +86,7 @@ public class TJExample {
public static void main(String argv[]) {
BufferedImage img = null; byte[] bmpBuf = null;
TJTransform xform = new TJTransform();
try {
@@ -133,6 +146,38 @@ public class TJExample {
}
else usage();
}
if(argv[i].substring(0, 2).equalsIgnoreCase("-g"))
xform.options |= TJ.XFORM_GRAY;
if(argv[i].equalsIgnoreCase("-hflip"))
xform.op = TJ.XFORM_HFLIP;
if(argv[i].equalsIgnoreCase("-vflip"))
xform.op = TJ.XFORM_VFLIP;
if(argv[i].equalsIgnoreCase("-transpose"))
xform.op = TJ.XFORM_TRANSPOSE;
if(argv[i].equalsIgnoreCase("-transverse"))
xform.op = TJ.XFORM_TRANSVERSE;
if(argv[i].equalsIgnoreCase("-rot90"))
xform.op = TJ.XFORM_ROT90;
if(argv[i].equalsIgnoreCase("-rot180"))
xform.op = TJ.XFORM_ROT180;
if(argv[i].equalsIgnoreCase("-rot270"))
xform.op = TJ.XFORM_ROT270;
if(argv[i].length() > 2
&& argv[i].substring(0, 2).equalsIgnoreCase("-c")) {
if(i >= argv.length - 1) usage();
String[] cropArg = argv[++i].split(",");
if(cropArg.length != 3) usage();
String[] dimArg = cropArg[2].split("[xX]");
if(dimArg.length != 2) usage();
int tempx = Integer.parseInt(cropArg[0]);
int tempy = Integer.parseInt(cropArg[1]);
int tempw = Integer.parseInt(dimArg[0]);
int temph = Integer.parseInt(dimArg[1]);
if(tempx < 0 || tempy < 0 || tempw < 1 || temph < 1) usage();
xform.x = tempx; xform.y = tempy;
xform.width = tempw; xform.height = temph;
xform.options |= TJ.XFORM_CROP;
}
}
}
String[] inFileTokens = argv[0].split("\\.");
@@ -156,7 +201,18 @@ public class TJExample {
fis.read(inputBuf);
fis.close();
TJDecompressor tjd = new TJDecompressor(inputBuf);
TJDecompressor tjd;
TJ.ScalingFactor sf;
if(xform.op != TJ.XFORM_NONE || xform.options != 0) {
TJTransformer tjt = new TJTransformer(inputBuf);
TJTransform t[] = new TJTransform[1];
t[0] = xform;
t[0].options |= TJ.XFORM_TRIM;
TJDecompressor[] tjdx = tjt.transform(t, 0);
tjd = tjdx[0];
}
else tjd = new TJDecompressor(inputBuf);
width = tjd.getWidth();
height = tjd.getHeight();
int inSubsamp = tjd.getSubsamp();
@@ -184,6 +240,7 @@ public class TJExample {
else outSubsamp = TJ.SAMP_444;
}
}
System.gc();
System.out.print("Dest. Image (" + outFormat + "): " + width + " x "
+ height + " pixels");
@@ -218,7 +275,8 @@ public class TJExample {
}
catch(Exception e) {
System.out.println(e);
e.printStackTrace();
System.exit(-1);
}
}

21
java/org/libjpegturbo/turbojpeg/TJ.java
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@@ -88,12 +88,31 @@ final public class TJ {
16, 0, 16, 0, 8, 24, 0
};
final public static int getBlueShift(int pixelFormat) throws Exception {
public static int getBlueShift(int pixelFormat) throws Exception {
if(pixelFormat < 0 || pixelFormat >= NUMPFOPT)
throw new Exception("Invalid pixel format");
return blueShift[pixelFormat];
}
// Transform operations
final public static int
NUMXFORMOPT = 8,
XFORM_NONE = 0,
XFORM_HFLIP = 1,
XFORM_VFLIP = 2,
XFORM_TRANSPOSE = 3,
XFORM_TRANSVERSE = 4,
XFORM_ROT90 = 5,
XFORM_ROT180 = 6,
XFORM_ROT270 = 7;
// Transform options
final public static int
XFORM_PERFECT = 1,
XFORM_TRIM = 2,
XFORM_CROP = 4,
XFORM_GRAY = 8;
// Flags
final public static int
BOTTOMUP = 2,

15
java/org/libjpegturbo/turbojpeg/TJDecompressor.java
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@@ -37,15 +37,16 @@ public class TJDecompressor {
}
public TJDecompressor(byte[] buf) throws Exception {
init();
setJPEGBuffer(buf, buf.length);
}
public TJDecompressor(byte[] buf, int bufSize) throws Exception {
init();
setJPEGBuffer(buf, bufSize);
}
public void setJPEGBuffer(byte[] buf, int bufSize) throws Exception {
if(handle == 0) init();
if(buf == null || bufSize < 1)
throw new Exception("Invalid argument in setJPEGBuffer()");
jpegBuf = buf;
@@ -250,10 +251,10 @@ public class TJDecompressor {
System.loadLibrary("turbojpeg");
}
private long handle = 0;
private byte[] jpegBuf = null;
private int jpegBufSize = 0;
private int jpegWidth = 0;
private int jpegHeight = 0;
private int jpegSubsamp = -1;
protected long handle = 0;
protected byte[] jpegBuf = null;
protected int jpegBufSize = 0;
protected int jpegWidth = 0;
protected int jpegHeight = 0;
protected int jpegSubsamp = -1;
};

90
java/org/libjpegturbo/turbojpeg/TJTransformer.java Normal file
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@@ -0,0 +1,90 @@
/*
* 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.
*/
package org.libjpegturbo.turbojpeg;
public class TJTransformer extends TJDecompressor {
public TJTransformer() throws Exception {
init();
}
public TJTransformer(byte[] buf) throws Exception {
init();
setJPEGBuffer(buf, buf.length);
}
public TJTransformer(byte[] buf, int bufSize) throws Exception {
init();
setJPEGBuffer(buf, bufSize);
}
public void transform(byte[][] dstBufs, TJTransform[] transforms,
int flags) throws Exception {
if(jpegBuf == null) throw new Exception("JPEG buffer not initialized");
transformedSizes = transform(jpegBuf, jpegBufSize, dstBufs, transforms,
flags);
}
public TJDecompressor[] transform(TJTransform[] transforms, int flags)
throws Exception {
byte[][] dstBufs = new byte[transforms.length][];
if(jpegWidth < 1 || jpegHeight < 1)
throw new Exception("JPEG buffer not initialized");
for(int i = 0; i < transforms.length; i++) {
int w = jpegWidth, h = jpegHeight;
if((transforms[i].options & TJ.XFORM_CROP) != 0) {
if(transforms[i].width != 0) w = transforms[i].width;
if(transforms[i].height != 0) h = transforms[i].height;
}
dstBufs[i] = new byte[TJ.bufSize(w, h)];
}
TJDecompressor[] tjd = new TJDecompressor[transforms.length];
transform(dstBufs, transforms, flags);
for(int i = 0; i < transforms.length; i++)
tjd[i] = new TJDecompressor(dstBufs[i], transformedSizes[i]);
return tjd;
}
public int[] getTransformedSizes() throws Exception {
if(transformedSizes == null)
throw new Exception("No image has been transformed yet");
return transformedSizes;
}
private native void init() throws Exception;
private native int[] transform(byte[] srcBuf, int srcSize, byte[][] dstBufs,
TJTransform[] transforms, int flags) throws Exception;
static {
System.loadLibrary("turbojpeg");
}
private int[] transformedSizes = null;
};

29
java/org_libjpegturbo_turbojpeg_TJTransformer.h Normal file
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@@ -0,0 +1,29 @@
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class org_libjpegturbo_turbojpeg_TJTransformer */
#ifndef _Included_org_libjpegturbo_turbojpeg_TJTransformer
#define _Included_org_libjpegturbo_turbojpeg_TJTransformer
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: org_libjpegturbo_turbojpeg_TJTransformer
* Method: init
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_org_libjpegturbo_turbojpeg_TJTransformer_init
(JNIEnv *, jobject);
/*
* Class: org_libjpegturbo_turbojpeg_TJTransformer
* Method: transform
* Signature: ([BI[[B[Lorg/libjpegturbo/turbojpeg/TJ/Transform;I)[I
*/
JNIEXPORT jintArray JNICALL Java_org_libjpegturbo_turbojpeg_TJTransformer_transform
(JNIEnv *, jobject, jbyteArray, jint, jobjectArray, jobjectArray, jint);
#ifdef __cplusplus
}
#endif
#endif