unsafe extern "C" fn base_src_fill<T: BaseSrcImpl>(
ptr: *mut GstBaseSrc,
offset: u64,
length: u32,
buffer: *mut GstBuffer,
) -> GstFlowReturn
unsafe extern "C" fn base_src_fill<T: BaseSrcImpl>(
ptr: *mut GstBaseSrc,
offset: u64,
length: u32,
buffer: *mut GstBuffer,
) -> GstFlowReturn