ff_data_unit_id_is_teletext  591 libavcodec/libzvbi-teletextdec.c         if (ff_data_unit_id_is_teletext(data_unit_id)) {
ff_data_unit_id_is_teletext   41 libavformat/dvbtxt.c         if (!ff_data_unit_id_is_teletext(buf[0]) && buf[0] != 0xff)