Access to frames from PyFunc as OpenCV GpuMat

[bwsw]

To provide to way to access batch elements as GpuMat OpenCV class.

[tomskikh]

Found this discussion on opencv forum. Opencv doesn't have python bindings for GpuMat (int rows, int cols, int type, void *data, size_t step=Mat::AUTO_STEP). I've tried the suggested solution to add a constructor that converts uint64 to void * and modified it a bit.

    CV_WRAP inline GpuMat(bool not_used, int rows, int cols, int type, uint64 dataAddr, size_t step = Mat::AUTO_STEP):
        GpuMat(rows, cols, type, (void*)dataAddr, step){}