[Bug 708438] codecparsers: HEVC bitstream parser

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=708438
  GStreamer | gst-plugins-bad | git

--- Comment #5 from sreerenj <bsreerenj at gmail.com> 2013-10-09 08:27:00 UTC ---
I have attached the hevc videoparser element implementation as another patch
which copied most of the code from h264parser since both are similar in many
cases. Still a few things needs to implement properly , for eg: SEI message
handling and timestamp/duration adjustment based on SEI if the upstream didn't
provide any valid timestamp/duration for the buffer.

Remember i didn't do any extensive testing for this, but all the basic cases
are working at least for me (samples are generated with the help of HM_12.0 and
MP4Box). Anyway for now i put the rank as SECONDARY and later we can change it
to PRIMARY once we fix all the existing issues (or at least the FIXMEs i have
mentioned in the code).

By the way i have a seen a couple of things which we need to optimize/correct
in h264parser while copying the code to h265parser. One eg: the h264parser is
doing all PAR calculation based on VUI header which is unnecessary since the
bitstream parser is already doing that.

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