Function ippiFilterGaussianGetBufferSize 

pub unsafe extern "C" fn ippiFilterGaussianGetBufferSize(
    maxRoiSize: IppiSize,
    kernelSize: Ipp32u,
    dataType: Type,
    numChannels: c_int,
    pSpecSize: *mut c_int,
    pBufferSize: *mut c_int,
) -> IppStatus