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Add JNI wrapper for TurboJPEG/OSS

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DRC
2011-02-04 11:06:36 +00:00
parent b10fb30664
commit 36adfee700
12 changed files with 635 additions and 3 deletions
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TurboJPEG/OSS JNI Wrapper
=========================
TurboJPEG/OSS can optionally be built with a Java Native Interface wrapper,
which allows the TurboJPEG/OSS dynamic library to be loaded and used directly
from Java applications. The Java front end for this is defined in
turbojpeg.java, which should be located in the same directory as this README
file. turbojpeg.java is licensed under a BSD-style license, so it can be
incorporated directly into both open source and proprietary projects without
restriction.
tjexample.java, which should also be located in the same directory as this
README file, demonstrates how to use the TurboJPEG/OSS Java front end to
compress and decompress JPEG images in memory.
javac *.java
builds .class files for both the front end and example code.
Note for OS X users
-------------------
/usr/lib, the directory under which libturbojpeg.dylib is installed on Mac
systems, is not part of the normal Java library path. Thus, when running a
Java application that uses TurboJPEG/OSS on Mac systems, you will need to pass
an argument of -Djava.library.path=/usr/lib to java.

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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class TJ */
#ifndef _Included_TJ
#define _Included_TJ
#ifdef __cplusplus
extern "C" {
#endif
#undef TJ_SAMP444
#define TJ_SAMP444 0L
#undef TJ_SAMP422
#define TJ_SAMP422 1L
#undef TJ_SAMP420
#define TJ_SAMP420 2L
#undef TJ_GRAYSCALE
#define TJ_GRAYSCALE 3L
#undef TJ_BGR
#define TJ_BGR 1L
#undef TJ_BOTTOMUP
#define TJ_BOTTOMUP 2L
#undef TJ_FORCEMMX
#define TJ_FORCEMMX 8L
#undef TJ_FORCESSE
#define TJ_FORCESSE 16L
#undef TJ_FORCESSE2
#define TJ_FORCESSE2 32L
#undef TJ_ALPHAFIRST
#define TJ_ALPHAFIRST 64L
#undef TJ_FORCESSE3
#define TJ_FORCESSE3 128L
#undef TJ_FASTUPSAMPLE
#define TJ_FASTUPSAMPLE 256L
#undef TJ_YUV
#define TJ_YUV 512L
/*
* Class: TJ
* Method: BUFSIZE
* Signature: (II)J
*/
JNIEXPORT jlong JNICALL Java_TJ_BUFSIZE
(JNIEnv *, jobject, jint, jint);
#ifdef __cplusplus
}
#endif
#endif

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java/tjCompressor.h Normal file
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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class tjCompressor */
#ifndef _Included_tjCompressor
#define _Included_tjCompressor
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: tjCompressor
* Method: Init
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_tjCompressor_Init
(JNIEnv *, jobject);
/*
* Class: tjCompressor
* Method: Destroy
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_tjCompressor_Destroy
(JNIEnv *, jobject);
/*
* Class: tjCompressor
* Method: Compress
* Signature: ([BIIII[BIII)J
*/
JNIEXPORT jlong JNICALL Java_tjCompressor_Compress
(JNIEnv *, jobject, jbyteArray, jint, jint, jint, jint, jbyteArray, jint, jint, jint);
#ifdef __cplusplus
}
#endif
#endif

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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class tjDecompressor */
#ifndef _Included_tjDecompressor
#define _Included_tjDecompressor
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: tjDecompressor
* Method: Init
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_tjDecompressor_Init
(JNIEnv *, jobject);
/*
* Class: tjDecompressor
* Method: Destroy
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_tjDecompressor_Destroy
(JNIEnv *, jobject);
/*
* Class: tjDecompressor
* Method: DecompressHeader
* Signature: ([BJ)LtjHeaderInfo;
*/
JNIEXPORT jobject JNICALL Java_tjDecompressor_DecompressHeader
(JNIEnv *, jobject, jbyteArray, jlong);
/*
* Class: tjDecompressor
* Method: Decompress
* Signature: ([BJ[BIIIII)V
*/
JNIEXPORT void JNICALL Java_tjDecompressor_Decompress
(JNIEnv *, jobject, jbyteArray, jlong, jbyteArray, jint, jint, jint, jint, jint);
#ifdef __cplusplus
}
#endif
#endif

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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);
}
}
};

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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.
*/
final class TJ {
// Subsampling options
final static int
SAMP444 = 0,
SAMP422 = 1,
SAMP420 = 2,
GRAYSCALE = 3;
// Flags
final static int
BGR = 1,
BOTTOMUP = 2,
FORCEMMX = 8,
FORCESSE = 16,
FORCESSE2 = 32,
ALPHAFIRST = 64,
FORCESSE3 = 128,
FASTUPSAMPLE = 256,
YUV = 512;
public native final static long BUFSIZE(int width, int height);
};
class tjCompressor {
tjCompressor() throws Exception {Init();}
public void close() throws Exception {Destroy();}
protected void finalize() throws Throwable {
try {
close();
} catch(Exception e) {
}
finally {
super.finalize();
}
};
private native void Init() throws Exception;
private native void Destroy() throws Exception;
// JPEG size in bytes is returned
public native long Compress(byte [] srcbuf, int width, int pitch,
int height, int pixelsize, byte [] dstbuf, int jpegsubsamp, int jpegqual,
int flags) throws Exception;
static {
System.loadLibrary("turbojpeg");
}
private long handle=0;
};
class tjHeaderInfo {
int subsamp=-1;
int width=-1;
int height=-1;
};
class tjDecompressor {
tjDecompressor() throws Exception {Init();}
public void close() throws Exception {Destroy();}
protected void finalize() throws Throwable {
try {
close();
} catch(Exception e) {
}
finally {
super.finalize();
}
};
private native void Init() throws Exception;
private native void Destroy() throws Exception;
public native tjHeaderInfo DecompressHeader(byte [] srcbuf, long size)
throws Exception;
public native void Decompress(byte [] srcbuf, long size, byte [] dstbuf,
int width, int pitch, int height, int pixelsize, int flags)
throws Exception;
static {
System.loadLibrary("turbojpeg");
}
private long handle=0;
};