[gstreamer-bugs] [Bug 638844] New: [PATCH] Fix pad callbacks so they handle when parent goes away

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=638844
  GStreamer | gstreamer (core) | git

           Summary: [PATCH] Fix pad callbacks so they handle when parent
                    goes away
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: ole.andre.ravnas at tandberg.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=177671)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=177671)
Patch fixing known issues of this nature in -core.

1) We need to lock and get a strong ref to the parent, if still there.
2) If it has gone away, we need to handle that gracefully.

This is necessary in order to safely modify a running pipeline. Has been
observed when a streaming thread is doing a buffer_alloc() while an
application thread sends an event on a pad further downstream, and from
within a pad probe (holding STREAM_LOCK) carries out the pipeline plumbing
while the streaming thread has its buffer_alloc() in progress.

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