GitLab

Do not declare *_sys_t typedefs globally in vlc_common.h. Instead,
declare them locally in each module that provides a definition.

This paves the way to move C++ definitions into anonymous namespaces in
order to respect C++ ODR.

The picture_resource_t and sout_stream_id_sys_t typedefs will be handled
separately, since they require specific additional changes.

See #18033
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Regression from cf4676c1.

In order to avoid confusion with future vlc_alloc.

They have been identical for a while.

pf_read() returns 0 to signify EOF, and -1 to signify no data.
pf_block() returns NULL either way. This flag is added for the
distinction.

This matches the stream_t.pf_read convention.

So far, it was returning zero on error. That prevented distinction
between an empty file and a file with unknown size.

Usage:

$ vlc concat:// :concat=URL1,URL2,....URLn

Note: As for the existing input-slave and input-list options, URLs are
assumed to not contain unencoded commas. This is usually the case but
not strictly warranted as the comma is a sub-delimiter.