[Bug 730539] sdp: add support for multiple crypto sessions

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=730539
  GStreamer | gst-rtsp-server | git

--- Comment #6 from Aleix Conchillo Flaqué <aleix at oblong.com> 2014-07-09 14:07:40 UTC ---
(In reply to comment #5)
> 
> We currently have something similar in the payloaders. In the caps we find the
> seqnum and timestamp of the first packet but any time you want to get the
> current values, you use the stats property to get a GstStructure of values. It
> used to be done with properties but it was hard to get an atomic snapshot of
> the seqnum and timestamp and possibly other fields.
> 
> So maybe we can do something similar for the ROC and other crypto params? I'm
> thinking that you get the stats to get all the fields in a consistent state to
> make the MIKEY message.

Got it. Yes, I think that would make sense and would be cleaner. But now, I
remember. Another problem was that you need to pass an SSRC to obtain its ROC,
that's why I didn't use a property which would be better than a signal.

How would you solve this?

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