Skins module
CONFIG_SKINS
  Enables the skins interface.
  BE CAREFUL: under linux, you must have the wxWindows library compiled 
  with GTK2 support See http://www.wxwindows.org.

CD input and control library (libcdio) support
CONFIG_CDIO

  This library is used in an enhanced audio CD plugin called "cddax"
  and a Video CD plugin called "vcdx". 

  It is also used in the "Probe" button of the "Open Disc" menu to find
  an appropriate media for the disc type that has been selected. 

  See http://www.gnu.org/software/libcdio.

audio CD module with CD-Text & CD-Paranoia (via libcdio)
CONFIG_CDDAX

  This audio CD plugin can get CD-Text information from an
  audio CD. If the library libcddb is available, the plugin can show
  CDDB information too. This plugin needs libraries from libcdio.

  The information from CD-Text or CDDB can be used in a number of ways.
  It is shown in the "Stream and Media Window" and it is shown when 
  playing a CD information in a playlist. Exactly what information to be
  shown can be customized. 

  This plugin can also make use of CD-paranoia to correct for jittering
  of a a CD-ROM drive. Jitter correction which is more CPU intensive but 
  is often desirable for making ripping more acurate. 

VCD module with navigation (via libcdio and libvcdinfo)
CONFIG_VCDX

  This Video CD plugin uses understands VCD information to a great level
  of detail. Much more so than the built-in VCD plugin. As as result, it 
  can perform playback control and show still menus and motion MPEGs in 
  the first ISO-9660 track. 

  Alas, the full potential of this plugin hasn't been realized, even
  though a great bit of the code is shared between this and the xine
  VCD plugin. In particular, menu selection and keyboard input is not
  available, and switching between different formats of MPEGs causes
  new windows to pop up. If you want more complete VCD playback, at
  present the xine VCD plugin is more complete. Volunteers in
  finishing this plugin are always welcome.

  This plugin needs libraries from libcdio, and a library from the
  vcdimager package called libvcdinfo.

  Information on vcdimager is at http://www.vcdimager.org

CDDB lookups (via libcddb) for audio CD
CONFIG_CDDB
  This library is used in an enhanced audio CD plugin called "cddax" to 
  allow it to look up audio CD information. CD database information
  resides on the Internet but since the same information appears 
  frequently, the information is often saved (or "cached") locally.

  See http://libcddb.sourceforge.net  

built-in VCD and audio CD support
CONFIG_VCD
  Built-in in support for Video CD (VCD) and audio CD (CD-DA) exists. 
  Support is pretty basic, but it doesn't require the use of external
  libraries libcdio and libvcdinfo. If you need more advanced support
  see the cddax and vcdx plugins.