It's not named update .xml since 0.9

This parameter is intended to give old skins a chance to play back video even
though no video tag is provided in the theme.xml file.

Also remove unneeded prototypes

Fixes #2899, at least on Linux. Can somebody test on Windows, please?

bridge variables need to be attached to global libvlc object to be
common to all bridge instances

from the header:
SBR: 0: off, 1: on; upsample, 2: on; downsampled, 3: off; upsampled

This breaks pretty much everybody's build. Thus it's completely
inadequate as a default setting (think of new devs...).

It also fixes a few remaining race conditions.

When using the transcode output filter there is now the option of
setting the language of the audio stream.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

There was opportunity for playlist items not showing up in Qt playlist due to race between playlist rebuilding and item-added, item-removed callbacks
Maybe also fixes some aspects of #2297 or completely - to test.

r12 is a scratch register so use it

It's so out-of-date that it's not even funny anymore.
Signed-off-by: Rafaël Carré <rafael.carre@gmail.com>

Picture resources where not released when VOUT_DISPLAY_RESET_PICTURES
was called while direct rendering was used.

This fixes problems with hiding the cursor while it is within the
"black bars". This should also improve gestures usability.

TODO:
 - use application names for input items
 - add an item for the whole desktop,
 - add items for XRandR outputs.