[Bug 730540] rtspsrc: parse crypto sessions to support rollover counters

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=730540

--- Comment #6 from Aleix Conchillo Flaqué <aconchillo at gmail.com> ---
(In reply to Sebastian Dröge (slomo) from comment #5)
> Review of attachment 326069 [details] [review]:
> 
> ::: gst/rtsp/gstrtspsrc.c
> @@ +2757,3 @@
> +
> +    if (ssrc == map->ssrc) {
> +      gst_caps_set_simple (caps, "roc", G_TYPE_UINT, map->roc, NULL);
> 
> What's so special about the roc that we only need to handle that and none of
> the others?

The roc is used for authentication. You only care about the one for your ssrc.

https://tools.ietf.org/html/rfc3711#section-4.2

If I understand correctly, in GStreamer, one caps corresponds to one ssrc, so
we only need the roc for that specific ssrc.

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