Question

i am trying to do real time image processing in android using jni. I have a native method to decode image data and i call this method for every frame. After a few seconds later i get out of memory and my app terminats.

LOG OUTPUT:

12-03 20:54:19.780: E/dalvikvm-heap(8119): Out of memory on a 3686416-byte allocation.

MY NATIVE METHOD:

JNIEXPORT jintArray JNICALL  Java_net_oyunyazar_arcc_data_FrameManager_processImage(JNIEnv* env, jobject javaThis, jint width, jint height, jbyteArray arr) {

    jint *convertedData;
    convertedData = (jint*)malloc((width*height) * sizeof(jint));

    jintArray result = (*env)->NewIntArray(env, width*height);


    jint y,x;
    jbyte grey;

    jsize len = (*env)->GetArrayLength(env, arr);
    jbyte *YUVData = (*env)->GetByteArrayElements(env, arr, 0);

        for (y = 0; y < height; y++){
            for (x = 0; x < width; x++){

                grey = YUVData[y * width + x];
                convertedData[y*width+x] =(jint) grey & 0xff;

            }
        }

    LOGD("Random [%d]",len);

    (*env)->SetIntArrayRegion(env, result, 0, (width*height),convertedData );

    free(convertedData);
    (*env)->ReleaseByteArrayElements(env, YUVData, (jbyte*)arr, 0);

    return result;
}

Thanks for any help.

Answer 1

I have solved this problem by releasing the parameters.

(*env)->ReleaseByteArrayElements(env, arr, YUVData, 0);

It works great now.