[Bug 677340] Event errors ignored, even if caused by dataflow errors

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=677340
  GStreamer | gstreamer (core) | 0.11.x

--- Comment #1 from Sebastian Dröge <slomo at circular-chaos.org> 2012-06-04 09:06:22 UTC ---
As discussed on IRC the idea would be to let EOS return FALSE immediately,
unlike other sticky events that only fail during data flow, if something goes
wrong. This makes sense because no data will come after EOS anymore that could
trigger a failure.

This OTOH also means that demuxers and other multi-src elements need to combine
event return values. If it returns FALSE for all pads, FALSE is it in general.
If one returns TRUE it's TRUE.

Elements driving the pipeline must post an error if pushing a sticky event
failed.


And elements that are failing in draining, i.e. due to an EOS event, have to
post an error message on the bus too.

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