unsafe extern "C" fn base_transform_transform_ip<T: BaseTransformImpl>(
ptr: *mut GstBaseTransform,
buf: *mut *mut GstBuffer,
) -> GstFlowReturn
unsafe extern "C" fn base_transform_transform_ip<T: BaseTransformImpl>(
ptr: *mut GstBaseTransform,
buf: *mut *mut GstBuffer,
) -> GstFlowReturn