Simplest way to pass float[][] to C++ via JNI

In my Java code I have a 2D float array float[x][4] floatArray. Here x can be between 1 and 25. I have to pass this 2D float array to a C++ method via JNI. My JNI method is

jboolean MyJNIMethod(JNIEnv * env, jobject obj, jobjectArray myArray)
{
    //how to convert this myArray to something that can be safely passed to C++ method below
}

Inside MyJNIMethod I have to call a C++ method and pass 2D float array taken from Java to this method

bool MyCplusPlusMethod(float coordinates[][4])
    {

    }

I am having a hard time in properly converting jobject to float[][] due to lack of native development knowledge. Can anyone tell me the simplest and safest possible way? Thanks