Add JNI wrapper for TurboJPEG/OSS

BUILDING.txt

@@ -30,6 +30,10 @@ Build Requirements
 
 -- GCC v4.1 or later recommended for best performance
 
+-- If building the TurboJPEG/OSS JNI wrapper, the Java Development Kit (JDK)
+   must be installed.  On OS X 10.5 and later, instead install the Java
+   Developer Package, which can be obtained from http://connect.apple.com.
+
 
 ==================
 Out-of-Tree Builds
@@ -117,6 +121,14 @@ add --without-arith-enc or --without-arith-dec to the configure command line to
 disable encoding or decoding (respectively.)
 
 
+TurboJPEG/OSS JNI Wrapper
+-------------------------
+Add --with-jni to the configure command line to incorporate an optional Java
+Native Interface wrapper into the TurboJPEG/OSS dynamic library.  This allows
+the dynamic library to be used directly from Java applications.  See
+java/README for more details.
+
+
 ========================
 Installing libjpeg-turbo
 ========================

ChangeLog.txt

@@ -1,3 +1,9 @@
+1.1.90 (1.2 beta1)
+==================
+
+[1] Added a JNI wrapper for TurboJPEG/OSS.  See java/README for more details.
+
+
 1.1.0
 =====
 

Makefile.am

@@ -34,12 +34,24 @@ libjpeg_la_SOURCES += jdarith.c
 
 endif
 
-libturbojpeg_la_SOURCES = $(libjpeg_la_SOURCES) turbojpegl.c turbojpeg.h \
+libturbojpeg_la_SOURCES = $(libjpeg_la_SOURCES) turbojpegl.c turbojpeg.h
-	turbojpeg-mapfile
+
+if WITH_JNI
+
+libturbojpeg_la_SOURCES += turbojpeg-jni.c
+TJMAPFILE = turbojpeg-mapfile.jni
+
+else
+
+TJMAPFILE = turbojpeg-mapfile
+
+endif
+
+libturbojpeg_la_SOURCES += $(TJMAPFILE)
 
 if ANON_VERSION_SCRIPT
 
-libturbojpeg_la_LDFLAGS += $(ANON_VERSION_SCRIPT_FLAG)$(srcdir)/turbojpeg-mapfile
+libturbojpeg_la_LDFLAGS += $(ANON_VERSION_SCRIPT_FLAG)$(srcdir)/$(TJMAPFILE)
 
 endif
 

configure.ac

@@ -231,6 +231,16 @@ AM_CONDITIONAL([WITH_ARITH_DEC], [test "x$with_arith_dec" != "xno"])
 
 AM_CONDITIONAL([WITH_ARITH], [test "x$with_arith_dec" != "xno" -o "x$with_arith_enc" != "xno"])
 
+AC_MSG_CHECKING([whether to include JNI wrapper in TurboJPEG/OSS])
+AC_ARG_WITH([jni],
+    AC_HELP_STRING([--with-jni],[Include JNI wrapper in the TurboJPEG/OSS library]))
+if test "x$with_jni" = "xyes"; then
+    AC_MSG_RESULT(yes)
+else
+    AC_MSG_RESULT(no)
+fi
+AM_CONDITIONAL([WITH_JNI], [test "x$with_jni" = "xyes"])
+
 # SIMD is optional
 AC_ARG_WITH([simd],
     AC_HELP_STRING([--without-simd],[Omit accelerated SIMD routines.]))

java/README

@@ -0,0 +1,27 @@
+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.

java/TJ.h

@@ -0,0 +1,47 @@
+/* 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

java/tjCompressor.h

@@ -0,0 +1,37 @@
+/* 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

java/tjDecompressor.h

@@ -0,0 +1,45 @@
+/* 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

java/tjexample.java

@@ -0,0 +1,91 @@
+/*
+ * 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);
+    }
+  }
+
+};

java/turbojpeg.java

@@ -0,0 +1,123 @@
+/*
+ * 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;
+};

turbojpeg-jni.c

@@ -0,0 +1,200 @@
+/*
+ * 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.
+ */
+
+#include "turbojpeg.h"
+#include <jni.h>
+#include "java/tjCompressor.h"
+#include "java/tjDecompressor.h"
+#include "java/TJ.h"
+
+#define _throw(msg) {  \
+	jclass _exccls=(*env)->FindClass(env, "java/lang/Exception");  \
+	if(!_exccls) goto bailout;  \
+	(*env)->ThrowNew(env, _exccls, msg);  \
+	goto bailout;  \
+}
+
+#define bailif0(f) {if(!(f)) goto bailout;}
+
+#define gethandle() {  \
+	jclass _cls=(*env)->GetObjectClass(env, obj);  \
+	jfieldID _fid;  \
+	if(!_cls) goto bailout;  \
+	bailif0(_fid=(*env)->GetFieldID(env, _cls, "handle", "J"));  \
+	handle=(tjhandle)(long)(*env)->GetLongField(env, obj, _fid);  \
+}
+
+JNIEXPORT jlong JNICALL Java_TJ_BUFSIZE
+	(JNIEnv *env, jobject obj, jint width, jint height)
+{
+	return TJBUFSIZE(width, height);
+}
+
+JNIEXPORT void JNICALL Java_tjCompressor_Init
+	(JNIEnv *env, jobject obj)
+{
+	jclass cls;
+	jfieldID fid;
+	tjhandle handle;
+
+  if((handle=tjInitCompress())==NULL)
+		_throw(tjGetErrorStr());
+
+	bailif0(cls=(*env)->GetObjectClass(env, obj));
+	bailif0(fid=(*env)->GetFieldID(env, cls, "handle", "J"));
+	(*env)->SetLongField(env, obj, fid, (long)handle);
+
+	bailout:
+	return;
+}
+
+JNIEXPORT jlong JNICALL Java_tjCompressor_Compress
+	(JNIEnv *env, jobject obj, jbyteArray src, jint width, jint pitch,
+		jint height, jint pixelsize, jbyteArray dst, jint jpegsubsamp,
+		jint jpegqual, jint flags)
+{
+	tjhandle handle=0;
+	unsigned long size=0;
+	jbyte *srcbuf=NULL, *dstbuf=NULL;
+
+	gethandle();
+
+	bailif0(srcbuf=(*env)->GetPrimitiveArrayCritical(env, src, 0));
+	bailif0(dstbuf=(*env)->GetPrimitiveArrayCritical(env, dst, 0));
+
+	if(tjCompress(handle, srcbuf, width, pitch, height, pixelsize, dstbuf,
+		&size, jpegsubsamp, jpegqual, flags)==-1)
+	{
+		(*env)->ReleasePrimitiveArrayCritical(env, dst, dstbuf, 0);
+		(*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);
+		_throw(tjGetErrorStr());
+	}
+
+	bailout:
+	if(dstbuf) (*env)->ReleasePrimitiveArrayCritical(env, dst, dstbuf, 0);
+	if(srcbuf) (*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);
+	return size;
+}
+
+JNIEXPORT void JNICALL Java_tjCompressor_Destroy
+	(JNIEnv *env, jobject obj)
+{
+	tjhandle handle=0;
+
+	gethandle();
+
+	if(tjDestroy(handle)==-1) _throw(tjGetErrorStr());
+
+	bailout:
+	return;
+}
+
+JNIEXPORT void JNICALL Java_tjDecompressor_Init
+	(JNIEnv *env, jobject obj)
+{
+	jclass cls;
+	jfieldID fid;
+	tjhandle handle;
+
+  if((handle=tjInitDecompress())==NULL) _throw(tjGetErrorStr());
+
+	bailif0(cls=(*env)->GetObjectClass(env, obj));
+	bailif0(fid=(*env)->GetFieldID(env, cls, "handle", "J"));
+	(*env)->SetLongField(env, obj, fid, (long)handle);
+
+	bailout:
+	return;
+}
+
+JNIEXPORT jobject JNICALL Java_tjDecompressor_DecompressHeader
+	(JNIEnv *env, jobject obj, jbyteArray src, jlong size)
+{
+	jclass jhicls=NULL;
+	jfieldID fid;
+	tjhandle handle=0;
+	jbyte *srcbuf=NULL;
+	int width=0, height=0, jpegsubsamp=-1;
+	jobject jhiobj=NULL;
+
+	gethandle();
+
+	bailif0(srcbuf=(*env)->GetPrimitiveArrayCritical(env, src, 0));
+
+	if(tjDecompressHeader2(handle, srcbuf, (unsigned long)size, 
+		&width, &height, &jpegsubsamp)==-1)
+	{
+		(*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);
+		_throw(tjGetErrorStr());
+	}
+	(*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);  srcbuf=NULL;
+
+	bailif0(jhicls=(*env)->FindClass(env, "tjHeaderInfo"));
+	bailif0(jhiobj=(*env)->AllocObject(env, jhicls));
+
+	bailif0(fid=(*env)->GetFieldID(env, jhicls, "subsamp", "I"));
+	(*env)->SetIntField(env, jhiobj, fid, jpegsubsamp);
+	bailif0(fid=(*env)->GetFieldID(env, jhicls, "width", "I"));
+	(*env)->SetIntField(env, jhiobj, fid, width);
+	bailif0(fid=(*env)->GetFieldID(env, jhicls, "height", "I"));
+	(*env)->SetIntField(env, jhiobj, fid, height);
+
+	bailout:
+	return jhiobj;
+}
+
+JNIEXPORT void JNICALL Java_tjDecompressor_Decompress
+	(JNIEnv *env, jobject obj, jbyteArray src, jlong size, jbyteArray dst,
+		jint width, jint pitch, jint height, jint pixelsize, jint flags)
+{
+	tjhandle handle=0;
+	jbyte *srcbuf=NULL, *dstbuf=NULL;
+
+	gethandle();
+
+	bailif0(srcbuf=(*env)->GetPrimitiveArrayCritical(env, src, 0));
+	bailif0(dstbuf=(*env)->GetPrimitiveArrayCritical(env, dst, 0));
+
+	if(tjDecompress(handle, srcbuf, (unsigned long)size, dstbuf, width, pitch,
+		height, pixelsize, flags)==-1)
+	{
+		(*env)->ReleasePrimitiveArrayCritical(env, dst, dstbuf, 0);
+		(*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);
+		_throw(tjGetErrorStr());
+	}
+
+	bailout:
+	if(dstbuf) (*env)->ReleasePrimitiveArrayCritical(env, dst, dstbuf, 0);
+	if(srcbuf) (*env)->ReleasePrimitiveArrayCritical(env, src, srcbuf, 0);
+	return;
+}
+
+JNIEXPORT void JNICALL Java_tjDecompressor_Destroy
+	(JNIEnv *env, jobject obj)
+{
+	Java_tjCompressor_Destroy(env, obj);
+}

turbojpeg-mapfile.jni

@@ -0,0 +1,22 @@
+{
+	global:
+		tjInitCompress;
+		tjCompress;
+		TJBUFSIZE;
+		tjInitDecompress;
+		tjDecompressHeader;
+		tjDecompressHeader2;
+		tjDecompress;
+		tjDestroy;
+		tjGetErrorStr;
+		Java_TJ_BUFSIZE;
+		Java_tjCompressor_Init;
+		Java_tjCompressor_Compress;
+		Java_tjCompressor_Destroy;
+		Java_tjDecompressor_Init;
+		Java_tjDecompressor_DecompressHeader;
+		Java_tjDecompressor_Decompress;
+		Java_tjDecompressor_Destroy;		
+	local:
+		*;
+};