Function ippiFilterGaussianInit 

pub unsafe extern "C" fn ippiFilterGaussianInit(
    roiSize: IppiSize,
    kernelSize: u32,
    sigma: f32,
    borderType: u32,
    dataType: i32,
    numChannels: i32,
    pSpec: *mut ippcvFilterGaussianSpec,
    pBuffer: *mut u8,
) -> i32