[Bug 719587] New: rtpgstpay: delay events until first buffer so they can be timestamped

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=719587
  GStreamer | gst-plugins-good | git

           Summary: rtpgstpay: delay events until first buffer so they can
                    be timestamped
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: sebras at hotmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


While developing a patch (concerning RTP-Info header) for gst-rtsp-server I
stumbled upon an rtspserver test using rtpgstpay where my newly introduced code
expected the first payloaded buffer in each media stream to have a timestamp.
Unfortunately rtpgstpay sent an non-timestamped event as its first RTP packet
so my code failed.

Now, there is no reason to _not_ timestamp the events packaged into RTP packets
so therefore I opted to delay the events until the first buffer arrives and
give both events and buffer the same timestamp.

Finally there was no unit test for rtpgstpay so I created a silly one that at
least exercise the rtpgstpay a little bit.

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