[gstreamer-bugs] [Bug 623806] New: [pipeline] Doesn't update the clock if the currently used one gets lost and the start time did not change

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=623806
  GStreamer | gstreamer (core) | git

           Summary: [pipeline] Doesn't update the clock if the currently
                    used one gets lost and the start time did not change
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: slomo at circular-chaos.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


This happens for example in playbin2's gapless mode, where the pipeline already
goes to PAUSED because a video sink is added and then the clock gets lost
because the audio sink (which provided the clock) gets removed.

The attached patch fixes this but I'm not 100% sure if it's entirely correct.
Also a gst_element_get_clock() would still return the old, broken clock until
the next PAUSED->PLAYING transition but that's probably not a problem.

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