[MPlayer-dev-eng] [PATCH] sub properties and metadata as properties

[Alban Bedel]

Hi all,

this is the beggining of my work to get rid of the current metadata API and
use the property API instead. IMHO having a separate API for metadata doesn't
make much sense when everything else can be queried via the properties.
Another thing is the limitation of the metadata API as it only allow to query
a subset of the possible metadata.

The first patch rework the property API to allow having sub properties
such as metadata/title, etc.

The second patch add the needed stuff to be able to query all info currently
available via the metadata API with properties.

After that (and some more work on the menu) it should be possible to remove
the whole metadata API. IMHO the related commands (MP_CMD_GET_META_*) should
then also be removed. However i'd like to hear what others thinks about
removing useless commands. On the plus side we would get rid of quiet some
code, on the minus side it would break some frontend.

	Albeu
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