[Bug 763373] New: GstRtpBin and RTPSession ssrc-related signals should have ::ssrc detail

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763373

            Bug ID: 763373
           Summary: GstRtpBin and RTPSession ssrc-related signals should
                    have ::ssrc detail
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nirbheek.chauhan at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

For signals such as on-ssrc-active, on-ssrc-sdes, on-timeout, and many more, a
common pattern is to only check when a specific SSRC is active, has timed out,
etc. It would be quite useful to be able to pre-filter by specifying the SSRC
in the signal detail itself.

So, for instance, you'd do:

 void
 on_new_ssrc (GstElement * rtpbin, guint session, guint ssrc, ...)
 {
   gchar *detailed_signal = g_strdup_printf ("on-ssrc-active::%u", ssrc);
   g_signal_connect (rtpbin, detailed_signal, on_our_ssrc_active, NULL);
 }

 g_signal_connect (rtpbin, "on-new-ssrc", on_new_ssrc, NULL);

Instead of having a filter inside on_our_ssrc_active() which would have to
check whether we're handling that specific SSRC.

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