[Bug 743345] glimagesink: Add support for dmabuf
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Wed Feb 25 09:56:43 PST 2015
https://bugzilla.gnome.org/show_bug.cgi?id=743345
Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #24 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> ---
(In reply to Daniel Stone from comment #23)
> Huh? You specify the dmabuf FDs when you create an EGLImage, and you cannot
> modify that afterwards.
Seems exact. EGLImages are created for a set of FDs. The concern being that in
current draft, each time a set of FDs arrive, we create a new EGLImage (and
texture), which we dispose when we are done with it. We could potentially
optimize this since FDs comes from a pool and will be recurrent. That being
said, the complexity comes from the fact the pool model does not work, we need
a cache where we can retrieve a specific EGLImage depending on specific set of
FDs. We also need a smart way to invalidate the cache (a mini object weak
pointer probably works here, if not racy).
Is Weston doing this kind of caching ? Is it worth considering this kind of
optimization so early ?
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