[Bug 732266] vaapidecode: h264: add support for decoding SVC base layers only

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=732266

--- Comment #37 from Orestis Floros <orestisf1993 at gmail.com> ---
(In reply to sreerenj from comment #36)
> Here the spec clearly saying that "SPS should be replaced by another SPS
> with the same id" and "SUBSET_SPS should be replaced by another SUBSET_SPS
> with the same id".
>
> Am I misinterpreting something here? :)

I think we don't disagree here since you say:

> Hm, I am afraid we need some serious changes in
> codecparser/videoparser/decoders since the GstH264NalParser is not keeping
> separate array for sps and subset sps.

Yes, my solution is a bit hacky.

> Is it the only sample which exhibiting this behavior?

With some quick scripting I found that 137 out of 258 SVC *.264 conformance
bitstreams exhibit this behavior but 0 out of 34 of the MVC ones.

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