Add JNI wrapper for TurboJPEG/OSS

git-svn-id: https://libjpeg-turbo.svn.sourceforge.net/svnroot/libjpeg-turbo@337 3789f03b-4d11-0410-bbf8-ca57d06f2519

1 files changed, 200 insertions, 0 deletions

diff --git a/trunk/turbojpeg-jni.c b/trunk/turbojpeg-jni.c
new file mode 100644
index 0000000..436a6dd
--- /dev/null
+++ b/trunk/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);
+}