Function interpolatei_custom64 

#[unsafe(no_mangle)]
pub extern "C" fn interpolatei_custom64(
    vector: Box<VecBuf>,
    frequency_response: extern "C" fn(*const c_void, f64) -> f64,
    frequency_response_data: *const c_void,
    is_symmetric: bool,
    interpolation_factor: i32,
) -> VectorInteropResult<VecBuf>

Convolves the vector with an impulse response defined by frequency_response and the void pointer frequency_response_data. The frequency_response_data pointer is passed to the frequency_response function at every call and can be used to store parameters.