[Bug 697548] New: Setting same caps resets decoder

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=697548
  GStreamer | gst-libav | 1.0.5

           Summary: Setting same caps resets decoder
    Classification: Platform
           Product: GStreamer
           Version: 1.0.5
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-libav
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: siva.chandran.p at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Inside gst_ffmpegviddec_set_format function of gstavviddec.c file, we attempt
to make sure that the new caps is not the same one we already have and we avoid
draining and closing/resetting the decoder.

But because we set the 'last_caps' to the new caps before we close/reset the
decoder, the last_caps is reset to NULL immediately after we setting it to the
new caps. Due to this we are not able to detect whether the given caps is new
one or the one the decoder is already configured for.

This makes the decoder to get reset every time we set the caps even if the
decoder is already configured for the given caps.

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