Audacious

    /* JWT: KEEP (DON'T OVERWRITE/BLANK OUT) ENTRY'S EXTENDED M3U DATA IF TUPLE'S CORRESPONDING DATA IS NOT SET!

       (NEEDED FOR EXTENDED M3U PLAYLIST ITEMS THAT SET METADATA WITH #EXT*** TAGS!)

       (POSSIBILITIES ARE:  TITLE, ALBUM, ARTIST, & GENRE) - SEE:  https://en.wikipedia.org/wiki/Extended_M3U#M3U8)

       (NOTE:  MAY STILL BE OVERWRITTEN BY METADATA TAGS IN FILE OR USER TAG FILES!)

    */

    String Title = entry->tuple.get_str(Tuple::Title);

    if (!tuple.is_set(Tuple::Title))

        tuple.set_str(Tuple::Title, Title);

    String Album = entry->tuple.get_str (Tuple::Album);

    if (! tuple.is_set (Tuple::Album))

        tuple.set_str (Tuple::Album, Album);

    String Artist = entry->tuple.get_str (Tuple::Artist);

    if (! tuple.is_set (Tuple::Artist))

        tuple.set_str (Tuple::Artist, Artist);

    String Genre = entry->tuple.get_str (Tuple::Genre);

    if (! tuple.is_set (Tuple::Genre))

        tuple.set_str (Tuple::Genre, Genre);