[gstreamer-bugs] [Bug 430031] New: Documentation implies it's ok to change data from within a probe

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | documentation | Ver: 0.10.x
           Summary: Documentation implies it's ok to change data from within
                    a probe
           Product: GStreamer
           Version: 0.10.x
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: documentation
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: follower at rancidbacon.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Documentation at
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-dataaccess.html
implies one could change data from within a probe--on IRC,Company says that's a
bad idea.

> Company: 
> in principle it works, but...
> modifying buffers requires being the only one holding a reference to that buffer
> that's what copy_on_write does, it creates a copy if necessary
> unfortunately copying inside a probe callback does not work
> so what the example does is unsupported behaviour that works in that one example


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