[Bug 646566] New: Protect against Pad-Parent disappearing

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=646566
  GStreamer | gstreamer (core) | git

           Summary: Protect against Pad-Parent disappearing
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: blocker
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: havard.graff at tandberg.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
      GNOME target: ---
     GNOME version: ---


We have done a lot of work on stress-testing element for different scenarios
where the pad-parent might disappear. Upstream Events / Querys and pad-allocs
arriving while the element goes down.

Instead of making lots of bugs for this, I thought I could post all the patches
here instead. Pretty straight-forward self-explanatory stuff.

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