[Bug 726325] RFC: Add tunneling support.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=726325
  GStreamer | gst-omx | git

--- Comment #44 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-04-09 07:57:30 UTC ---
For the metas you could do custom "meta tunneling" between tunneled elements,
that forwards the meta the same way serialized events are forwarded... it
really requires the same logic as you need to keep track of buffers for both
cases, for the events you'll need to put them in the correct place between the
correct buffers, for the metas you need to put them on the correct buffers (if
the tunnel did not apply/drop the metas already).

Main problem with the tunneling I see is that you can't use any of the existing
base classes without fake dataflow, but that should be no blocker. Just
additional work.

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