Function uvc_src::uvc_set_pantilt_rel

pub unsafe extern "C" fn uvc_set_pantilt_rel(
    devh: *mut uvc_device_handle_t, 
    pan_rel: i8, 
    pan_speed: u8, 
    tilt_rel: i8, 
    tilt_speed: u8
) -> uvc_error_t