[Bug 721953] pango: basetextoverlay: handle video/x-raw(ANY) if downstream supports the GstVideoOverlayCompositionMeta API

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=721953
  GStreamer | gst-plugins-base | git

--- Comment #7 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-01-16 19:25:08 UTC ---
Got two solution for this, plan A would be as describe by slomo:

-> CAPS QUERY
   ALLOCATION QUERY ->
   if comp
     <- ANY
   else
     <- what we support in SW

What I'm not sure is if in this pattern the allocation query may fail (e.g. too
soon) ? Plan B would be:

-> CAPS QUERY
   if no comp
     <- what we support in SW
   else
     <- ANY

-> CAPS EVENT:
     if no comp state yet
        QUERY ALLOCATION
        save comp state
        if no comp && !is_subset(incaps, SW caps))
          <- RECONFIGURE EVENT
     ...

Ideas ?

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