When the input changes (next track, ...), every capable extension
will execute the function "input_changed"

Forward messages to the extensions manager

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Also remove setting item here as preparsed, as if it has meta, that should
have been done allready somewhere else. Preparsing is controlled by
auto-preparse -variable (no idea where it can be changed), and should work ok.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

input_item: compress two functions into one and rename "Add" into "Post" for clarity and consistency

input_item: Remove input_item_AddSubItem2 and send subitem_added event from input_item_node_AppendNode().

This means that we don't need input_item_AddSubItem if there is an input_item_node_Append*().
input_item_AddSubItem now send the subitem_tree_added event as well.

Based on a patch by Adrien Maglo.

Fix memleak. Return E_GENERIC instead of displaying an error message.
Signed-off-by: Laurent Aimar <fenrir@videolan.org>

Signed-off-by: Laurent Aimar <fenrir@videolan.org>

Signed-off-by: Laurent Aimar <fenrir@videolan.org>

 - XML encode everything (especially URL), not just some parameters,
 - use fputs() as appropriate,
 - remove a shadowed variable,
 - print duration as a 64-bits quantity.

I want to use function pointers in a later commit...

The Audio class can only be created/destroyed by the associated MediaPlayer
class. I will add some copy constructor later on.