[Bug 743905] New: multiqueue: handle the BUFFERING query

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=743905
  GStreamer | gstreamer (core) | git master

           Summary: multiqueue: handle the BUFFERING query
    Classification: Platform
           Product: GStreamer
           Version: git master
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: dpalmer at digisoft.tv
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=295990)
 View: https://bugzilla.gnome.org/attachment.cgi?id=295990
 Review: https://bugzilla.gnome.org/review?bug=743905&attachment=295990

This patch adds support for the BUFFERING query. 

Currently, the multiqueue element doesn't handle the BUFFERING query, whereas
it's counterpart queue2 does. 

The attached patch adds support for the BUFFERING query. 

I call on update_buffering() when processing the query. This is different to
how queue2 operates - it just determines whether the element should be
buffering, but doesn't update the internal data structures which keep track on
whether the element is buffering. This seems inconsistent to me - code which is
listening on BUFFERING events may get a different impression of things than
code which is using the query.

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