We do not need to care which functions are in the math library. We only
need to care whether libm actually exists and can be linked against.

And by the way, lets define @LIBM@ for makefiles.

macosx: implemented both skipping within an item and item changing for the forward/backward buttons (closes #4943)

removed remnants of the Dudiak interface, added PXSourceList by Alex Rozanski (BSD-new licensed) which will be used for the new implementation, added a to-be-replaced png for the window's topbar

Didn't notice them first time.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

This should cleanup locking when applying the volume, though there are
still some (non-crashing) races in setting/getting the volume.

This also adds an API to report the volume from the output, though it's
currently left as a dummy.

This assumption is correct and already present in plenty of code paths
(e.g. when converting to/from float).

untested, since the affected code is part of the S/PDIF handling

Otherwise the next probed plugin would get a potentially corrupted
input format. This bug may affect other audio output plugins and
similarly even some video outptu display plugins (not checked yet).

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

New doxygen command \libvlc_return_bool means that wrapper generators
should translate returning int to a boolean value.

For example, this is useful for Ruby, where every number, including 0,
is considered to be true.

For normal HTML/LaTeX documentation it's invisible.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This prepares for a possible cleanup of the audio output object,
especially hiding more stuff into the core.

macosx: fixed updateTitle as suggested by j-b and made sure to the represented filename correctly, if applicable

macosx: remove 2 interface update timers (2 threads), 1 additional interface update thread and replaced everything by callbacks

macosx: don't use NSNotifcations to handle VLC's dialog callbacks, always perform NSAlert and friends on main thread

additionally, removed 2 clients of the manageInterface loop, which will be removed all together shortly