Get a convolution descriptor.

    This function queries a previously initialized 2D convolution descriptor object.

    Parameters
    ----------
    convDesc : cudnnConvolutionDescriptor
        Handle to a previously created convolution descriptor.

    Returns
    -------
    pad_h : int
        zero-padding height: number of rows of zeros implicitly concatenated onto
        the top and onto the bottom of input images.
    pad_w : int
        zero-padding width: number of columns of zeros implicitly concatenated
        onto the left and onto the right of input images.
    u : int
        Vertical filter stride.
    v : int
        Horizontal filter stride.
    dilation_h : int
        Filter height dilation.
    dilation_w : int
        Filter width dilation.
    mode : cudnnConvolutionMode
        Either CUDNN_CONVOLUTION or CUDNN_CROSS_CORRELATION.
    computeType : cudnnDataType
        Compute precision

def cudnnGetConvolution2dDescriptor(convDesc):
    """"
    Get a convolution descriptor.

    This function queries a previously initialized 2D convolution descriptor object.

    Parameters
    ----------
    convDesc : cudnnConvolutionDescriptor
        Handle to a previously created convolution descriptor.

    Returns
    -------
    pad_h : int
        zero-padding height: number of rows of zeros implicitly concatenated onto
        the top and onto the bottom of input images.
    pad_w : int
        zero-padding width: number of columns of zeros implicitly concatenated
        onto the left and onto the right of input images.
    u : int
        Vertical filter stride.
    v : int
        Horizontal filter stride.
    dilation_h : int
        Filter height dilation.
    dilation_w : int
        Filter width dilation.
    mode : cudnnConvolutionMode
        Either CUDNN_CONVOLUTION or CUDNN_CROSS_CORRELATION.
    computeType : cudnnDataType
        Compute precision
    """
    pad_h = ctypes.c_int()
    pad_w = ctypes.c_int()
    u = ctypes.c_int()
    v = ctypes.c_int()
    dilation_h = ctypes.c_int()
    dilation_w = ctypes.c_int()
    mode = ctypes.c_int()
    computeType = ctypes.c_int()

    status = _libcudnn.cudnnGetConvolution2dDescriptor(convDesc, ctypes.byref(pad_h),
                                                    ctypes.byref(pad_w), ctypes.byref(u),
                                                    ctypes.byref(v), ctypes.byref(dilation_h),
                                                    ctypes.byref(dilation_w),
                                                    ctypes.byref(mode), ctypes.byref(computeType))

    cudnnCheckStatus(status)

    return (pad_h.value, pad_w.value, u.value, v.value, upscalex.value, upscaley.value, mode.value,
            computeType.value)