Callback type to filter, or modify #GrlMedia created when parsing a playlist using one of grl_pls_browse(), grl_pls_browse_sync() or grl_pls_browse_by_spec().
The callback is responsible for unreffing media when returning %NULL or another #GrlMedia.
media
the #GrlSource the browse call came from
a #GrlMedia to operate on
Callback type to filter, or modify #GrlMedia created when parsing a playlist using one of grl_pls_browse(), grl_pls_browse_sync() or grl_pls_browse_by_spec().
The callback is responsible for unreffing
mediawhen returning %NULL or another #GrlMedia.