unsafe extern "C" fn video_decoder_set_format<T: VideoDecoderImpl>(
ptr: *mut GstVideoDecoder,
state: *mut GstVideoCodecState,
) -> gboolean
unsafe extern "C" fn video_decoder_set_format<T: VideoDecoderImpl>(
ptr: *mut GstVideoDecoder,
state: *mut GstVideoCodecState,
) -> gboolean