Function ippiThresholdAdaptiveGaussGetBufferSize 

pub unsafe extern "C" fn ippiThresholdAdaptiveGaussGetBufferSize(
    roiSize: IppiSize,
    maskSize: IppiSize,
    dataType: i32,
    numChannels: i32,
    pSpecSize: *mut i32,
    pBufferSize: *mut i32,
) -> i32