[gstreamer-bugs] [Bug 610265] New: gstrtpmp4gdepay issuing a SIGFPE crashing an application

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=610265
  GStreamer | gst-plugins-good | 0.10.16

           Summary: gstrtpmp4gdepay issuing a SIGFPE crashing an
                    application
    Classification: Desktop
           Product: GStreamer
           Version: 0.10.16
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: anders.skargren at axis.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=154039)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=154039)
Patch for gstrtpmp4gdepay to avoid a SIGFPE.

Sometimes(very rarely, but it does happen) the RTP timestamp on the first 2
packets received can be the same, causing the 

/* get the number of packets by dividing with the duration */
diff /= rtpmp4gdepay->constantDuration;

to issue a SIGFPE.

Attaching an example fix that also recalculates the constantDuration for every
received packet. It unfortunately doesnt seem like a good idea to base this
value on only the first 2 packets due to that the delta can actually vary alot.

This patch needs work, but can at least highlight the issue.

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