[Bug 785006] DirectViv texture upload method is broken

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785006

--- Comment #3 from Jan Schmidt <thaytan at noraisin.net> ---
I think there's 2 solutions:

1) Add a CapsFeature that's conditionally negotiated, and glupload only
supports DirectVIV when the caps feature is present, but upstream also (2nd
preference) negotiates plain video/x-raw caps without it
2) Add a random field to all video/x-raw caps that marks the stream as
'is-physical-memory=true' - and hope that field is passed on appropriately by
intermediate elements, and deleted if they copy the data to a non-physical
buffer.


1) Seems slightly more complicated to implement, but more likely to not
randomly fail.

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