(cherry picked from commit 0ec4e51a)

This fixes a few "deadlocks" with input waiting for playlist, while
playlist is waiting for input event.

It workarounds a picture leak in libmpeg2/ffmpeg decoder, fixing the menu for
a few DVDs.

(cherry picked from commit eb74f351)
(cherry picked from commit 924a0672)

(cherry picked from commit f44cc88b)

Conflicts:

	src/libvlc.c

(cherry picked from commit 62ab4dde)

Conflicts:

	src/playlist/thread.c

(cherry picked from commit 296bf6e2)

(cherry picked from commit 78cb33cb)

(cherry picked from commit 118e8a51)

(cherry picked from commit 05757cdc)

(cherry picked from commit 28092982)

Pointed-out-by: Laurent Aimar
(cherry picked from commit 82580b6f)

Close #1998.

(cherry picked from commit d2348d98)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

This Widget (base QLabel) is designed to show the cover art. It handles right-click, and show a context menu that has only one entry:

- Download cover art

When the user clicks it, vlc downloads the cover art (or finds it in the cache), and displays it when downloaded
(cherry picked from commit 4dd472bb)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

(cherry picked from commit d8c32a08)

(cherry picked from commit fccf6aa0)

And Fixed initial snpshot/fullscreen state.
It fixes a regression introduced by fccf6aa0

It is provided for convenience for interfaces.

(cherry picked from commit dbc2bb8a)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

(cherry picked from commit 8cebd56a)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

(it was used by net_OpenDgram when no server is specified).

This reverts commit 1a4dc822.
I will backport the proper fix.

It may improve TS clock synchro algo.

DEMUX_GET_PTS_DELAY should returns microsecond.

You should NOT remove caching to PTS to create PCR.
It was probably a workaround for the previous bug. It could explains
the problems with TS over RTP (for TS with small pcr/pts delay that is, not
created by VLC)

Implemented missing DEMUX_CAN_* query.

(cherry picked from commit 2221f03d)

(cherry picked from commit b8b83532)

Pointed-out-by: Sébastien Escudier
(cherry picked from commit b4329926)

Crash happens if you do:
 - Play item
 - Activate vfilter
 - Stop item
 - Deactivate vfilter... BooM.

This is a quick fix that does not want to be in master... Proper fix should go to master.

 While it is great for (some) streaming cases it is really wrong for saving
to a file for example and/or without using the gather module.

 If you have read how to use the gather module, you probably have read enough
documentation to add sout-keep...

This is of course NOT a good solution, and it has nothing to do in the interface...
So, either we let it like this, or we implement in the good place (not in intf)
or we remove this option