MPDPlaylist: Add a crop method to the playlist.
MPDPlaylist: Add a crop method to the playlist.

joansmith/dmix,hurzl/dmix,0359xiaodong/dmix,joansmith/dmix,0359xiaodong/dmix,abarisain/dmix,hurzl/dmix,jcnoir/dmix,abarisain/dmix,jcnoir/dmix