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

[GStreamer (GNOME Bugzilla)]

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

sreerenj <bsreerenj at gmail.com> changed:

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 Attachment #357927|none                        |accepted-commit_now
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--- Comment #28 from sreerenj <bsreerenj at gmail.com> ---
Review of attachment 357927:
 --> (https://bugzilla.gnome.org/review?bug=732266&attachment=357927)

The patch lgtm.

Just for a note:
There could be more refinement possible, for eg: even if the underlined driver
doesn't have support for high-profile(but has support for main or
constrained-base-line), it can still support the svc/mvc stream decode(base
only) where the base layer/view is encoded as constrained-base-line or main
profile. But this is complicated since it requires more signaling to the
upstream since we can't advertise the mvc/svc support in sink caps just based
on the hardware capability to decode the constrained-base-line or main.

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