dvbpsi own debug messages are not needed to debug VLC modules

This value is documented as '/*!< No messages */'

marked as LEGACY in POSIX.1-2001.
POSIX.1-2008 removes the  specifications  of  index()
and rindex(), recommending strchr(3) and strrchr(3) instead.

We only need it as a dependency of another library (fluidsynth)

contrib: added target for libffi since it is required to compile glib, which in turn is needed for Fluidsynth on Darwin (refs #10014)

contrib: added target for glib since this is a required dependency to compile fluidsynth (refs #10014)

http://gonze.com/playlists/playlist-format-survey.html#ASX

somehow #3435

Close #10019

Having pts doesn't mean we have a valid index.
Also, waiting 50 frames, including all streams is pointless.
We expect at least a keyframe within 60 sec on seek track.
This wait is lowered to 5 sec of data if we estimate a low
bandwidth (that one might need a better hint)

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

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

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

Now callbacks are thread-safe and don't block UI thread while
calculating coefs again.

Also remove callbacks on Close.

button might be unmatched

GetMainName() can return a pointer to temporary string::

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

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

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

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

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