[Bug 689326] multifdsink: document that adding fd in NULL is not allowed

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=689326
  GStreamer | gst-plugins-base | 1.x

Tim-Philipp Müller <t.i.m> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|HEAD                        |1.1.1
            Summary|adding fd to multifdsink    |multifdsink: document that
                   |makes assertion `set !=     |adding fd in NULL is not
                   |NULL' failed                |allowed
           Severity|critical                    |minor

--- Comment #5 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2012-12-02 12:56:31 UTC ---
> Solved:
> The critical mesages refer to multifdsink->fdset which is initialized at 
> gst_multi_fd_sink_start_pre
> That leads that the element has to be in PLAYING or READY state before adding
> new fd.

Yes, like I said in comment #1 ;)


> This is quite not obvious and probably should be documented.

I've made it print a warning now, and added a note to the docs.

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