[Bug 796599] New: ivfparse: Add vp9 header parsing to support dynamic resolution change notification

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796599

            Bug ID: 796599
           Summary: ivfparse: Add vp9 header parsing to support dynamic
                    resolution change notification
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: bsreerenj at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

IVF parser can detect the vp9 streams, but it only extracts the IVF header for
notifying the resolution. This won't work for dynamic resolution change,
especially vp9 supports to have inter prediction from varying resolution
frames.

For VP8, the ivfparser has uncompressed header parsing and it announces any
possible resolution change.

Adding support for VP9 FrameHeader parsing in ivfparse is more complicated than
vp8.

The easy option could be to add a dependency to the codecparser library so that
we can use vp9 codecparsing apis directly.

The second option is to add a dependency to the bitreader api from GStreamer
and implement the parsing support in ivfparse.

I would like to know what everybody thinks about this.

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