[Libva] [RFC] Towards generic codec support

[Bian, Jonathan]

If the app knows what profile_idc is, then it should use it to negotiate the correct profile with libva as this is the surest way to guarantee that the bitstream can be decoded by the underlying implementation.

Regards,
Jonathan  

-----Original Message-----
From: Gwenole Beauchesne [mailto:gbeauchesne at splitted-desktop.com] 
Sent: Tuesday, September 29, 2009 1:18 AM
To: Bian, Jonathan
Cc: libva at lists.freedesktop.org
Subject: RE: [Libva] [RFC] Towards generic codec support

Hi,

On Mon, 28 Sep 2009, Bian, Jonathan wrote:

> This sounds like a good idea. One potential problem with the profile 
> selection is that sometimes the "highest" profile may not be a superset 
> of the profiles below it.

Yes, for such cases I actually thought about propagating profile_idc and 
level_idc to the relevant pic params. It's probably a good thing to know 
what the bitstream tells anyway, e.g. for error-checking. Isn't it 
possible for a bitstream provide different SPS headers?

Regards,
Gwenole.