Remove VLC_META_ENGINE_*
Don't use VLC_META_INFO_CAT
Avoid using input_Item{Add,Get}Info
Remove disabled code in cdda
Remove "meta fetcher":
    There was only 1 module (not) implementing it (musicbrainz)
    Reduces complexity in playlist core
Use a more consistent naming
Factorize QT4 sorting and column display code
Remove unused members

This improves readability a lot and prevent us from reinventing the wheel.

Move ppsz_input_state[] to modules/control/rc.c because it is the only user of this variable. This silences a lot of warning messages.

This avoids the circular dependency there is from playlist and input item, which creates a dead lock at exit.

(Oh! another ABI break - if only vlc_input_item_t weren't public)

if( bla ) free( bla ); => free( bla );

misc/events.c: Fix event sending, by properly supporting event_manager edition (event_detach) while executing a callback (vlc_event_send). This is done through a recursive lock.

You can not change a playlist_item_t to be a node, when you previously registered events on it, using input_item_t sub items adding event, because the pointer will be destroyed.
If you want to use nodes anyway, you have to explicitely create them.
Note: we were lucky that xspf did work so far, because we were EXCLUSIVELY using invalid pointers, except for the 1st item being added to each playlist_item_t (it did happen before the conversion obviously).

* Add the ability to store user data in media_descriptor.
* Duration can now be retrieved from a media_instance
* Can new get the preparsed state of a media_descriptor
* Add callbacks for libvlc_MediaDescriptorDurationChanged/vlc_InputItemDurationChanged and libvlc_MediaDescriptorPreparsedChanged/vlc_InputItemPreparsedChanged.

input slave) Untested.
media_instance.c no longer depends on input_internal.h
Clean up a bit es_out pause handling.
Fixed DEMUX_GET_FPS description (double not float)

There is no way at the moment to know if a file is audio only