[Bug 759358] Add GST_CAPS_FEATURE_MEMORY_DMABUF "memory:DMABuf"

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=759358

--- Comment #10 from Julien Isorce <julien.isorce at gmail.com> ---
(In reply to Benjamin Gaignard from comment #8)
> configure.ac already check if mmap function exist.
> Maybe we can extend this check to test if mmap() fails rather then doing
> that at runtime ? You could also add an option to force enable/disable mmap
> to configuration time.

Also one could make it explicitly not mappable at runtime with your "int
smaf_set_secure(int fd, int secure); ", even if it was mappable in the first
place or I missed something ? A question related to that: does it mean that
during a laps of time the buffer is not secure ?

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