Questions tagged [jniwrapper]
54 questions
0
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Does `jobject` always have the same address if it represents the same Java instance?
Given a java object A a = new A(), and a bunch of native instance methods, if I were to take the address of the jobject representing a passed into those methods, would the address always be the same?
I have multiple final fields in these classes…
Mario Ishac
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1 answer
How to send a jchararray as parameter to C function
I am trying to use a C library (Pre-written and published) in an android app. I started my effort about writing a JNI wrapper around this C library. I can't figure out how to pass in jchararray properly to C.
int getData(char data[], const int…
Ashok Bommisetti
- 314
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creating a .h file for a DLL file, if you do know the method signatures
I am trying to access the methods of a DLL file in Java.
I wanted to use ComfyJ to create a wrapper for the DLL file.
ComfyJ has a wizard for this, however when I select the DLL file, it says that it cannot use this kind of DLL file.
So, next I…
bvdb
- 22,839
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SWIGTYPE pointer value assignment is slow
I am using SWIG to wrap certain c++ code for Java through JNI.
In Java I have
SWIGTYPE_p_int A = new example.new_array(n);
for (int i = 0; i< n ; i++)
example.setitem(A,i,2*i);
and I pass the array to C++ , but when n is large and I have to…
Bob
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- 4
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1 answer
Writing to registry on Windows 7 64-bit by means of JNIWrapper - Performance issue
Our installation uses jniwrapper library.
Now, we started installing on Windows 7 64-bit machines and are facing a problem.
To write values to registry we use the function
com.jniwrapper.win32.registry.RegistryKeyValues.put()
As long as we install…
andreasgk
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0
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1 answer
Issue with writing FaceRecognizer for Java with OpenCV 2.4.8
I have been given a project based around face recognition written in JavaCV to be improved. The idea was to either rewrite the program using C++ or write JNI bindings to still use Java. I did some research and according to the official website…
f78xd23
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- 15
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1 answer
Can not integrate .so library from working project to another one
I have working project where I use JNI to call methods from C library.
My project's structure:
And code which load library:
static {
System.loadLibrary("RemoveBackground");
}
It works good. But until I try to integrate this functionality in…
Val
- 4,225
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FFmpeg: java.lang.UnsatisfiedLinkError while calling Runnable class
I need to take a picture file and an audio file and create a video.
I know that it's possible to do with the help of
Runtime.getRuntime().exec("ffmpeg -i image.jpeg -i audio.mp3 out.avi")
but only for rooted devices, so I've tried to create JNI…
Yuliya Tarasenko
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JNI methods with more than one argument?
I am new to JNI and I wanted to pass three integer to the below function
void pauseEffectJNI(unsigned int nSoundId)
{
// void pauseEffect(int)
JniMethodInfo methodInfo;
if (! getStaticMethodInfo(methodInfo,…
user1169079
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