This removes vlc_list_release().

So that we can use private structs to initialize the vout.

Avoid trivial functions located in separate libraries.
Since the layout of date_t is public anyway, this costs nothing.

This was required for stream filters, but not for accesses. Now that
both are stream_t, this has become inconsistent.

So this just makes them optional also for stream filters.

A quick survey of used installation directories yields those:
datadir, libdir, localedir, pkgdatadir, pkglibdir, pkglibexecdir.

The current pair of functions is up to the requirements. This provides
a more generic function prototype, similar to what is done for user
directories.

Refs #19748, #19894.

Refs #18991

Regression from cf4676c1.

In order to avoid confusion with future vlc_alloc.

Nowadays, multiple pictures might share the same buffers. Consequently
the reference count of a single picture may be one even though there
are other references to the same buffers through a different picture.

Luckily picture_IsReferenced() is only really used in one place in
stream output, and then it was only an optimization.

vlc_gl_t can now be ref counted.

This helper can now be used by other modules like "stream directory".

refs #18605

Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

Use vlc_actions_get_key_names instead
Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

Nothing cares about the actual length if it is non-zero. Also constify.

(easier to test separately)

This set of "helpers" is only used by the libmpeg2 plugin, and was not
exposed to out-of-tree-plugins. There is apparently no point keeping it
inside the core.

Missing bits of previous changeset. Fixes Libvlc.

Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

This is a fix-up of c9195902