unsafe extern "C" fn base_sink_get_caps<T: BaseSinkImpl>(
ptr: *mut GstBaseSink,
filter: *mut GstCaps,
) -> *mut GstCaps
unsafe extern "C" fn base_sink_get_caps<T: BaseSinkImpl>(
ptr: *mut GstBaseSink,
filter: *mut GstCaps,
) -> *mut GstCaps