[Libva] rescale frame. HD4600 Haswell.

[Xiang, Haihao]

There is a simple case in {your_libva_dir}/test/videoprocess on the
staging branch for your reference. For scaling, what you need to do is
to set different width/height for source/destination file and change the
FILTER_TYPE to 
VAProcFilterNone in process.cfg.

Thanks
Haihao

> Hello!
> 
> Still no luck with resizing/scaling.
> http://01org.github.io/libva_master_doxygen/va__vpp_8h.html here can`t see anything related to subject.
> 
> Friends, need more help...
> 
> 26.11.2014, 21:14, "Nikita Orlov" <nikitos1550 at yandex.ru>:
> > thanks, we will try, if I will have more questions, I will ask you.
> >
> > 26.11.2014, 21:02, "Peter Frühberger" <peter.fruehberger at gmail.com>:
> >>  Hi,
> >>
> >>  here is a more advanced example of doing deinterlacing with VPP, you
> >>  can change the filter operation of course to do scaling:
> >>  https://github.com/xbmc/xbmc/blob/master/xbmc/cores/dvdplayer/DVDCodecs/Video/VAAPI.cpp#L2702
> >>
> >>  Usage of VPP is always the same, no matter of the actual operation.
> >>
> >>  Best Regards
> >>  Peter
> >>
> >>  2014-11-26 18:53 GMT+01:00 Nikita Orlov <nikitos1550 at yandex.ru>:
> >>>   Hi!
> >>>
> >>>   Could you point me to some exmaples of scaling before encoding?
> >>>   Can`t find any docs about it around web :-(
> >>>
> >>>   Thanks in advance!
> >>>
> >>>   26.11.2014, 16:52, "Steven Toth" <stoth at kernellabs.com>:
> >>>>   \> But, what do you mean about pre and post processing?
> >>>>>    Pre and post what operation? Pre video encoding and past video encoding?
> >>>>>
> >>>>>    If we are talking about encoding, I can`t imagine any post processing, because result
> >>>>>    of encoding is bitstream.
> >>>>>
> >>>>>    Could you explain it for me a bit more. Please.
> >>>>   The hardware has a Video Processing Pipeline, that can apply various
> >>>>   effects and transforms prior to encoding. Once of those mechanisms (as
> >>>>   Nikita pointed out) is a video scaler.
> >>>>
> >>>>   So, yes, you can scale the video prior to encoding. I've used it for
> >>>>   scaling down, although I don't think I've ever tried to scale up.
> >>>>
> >>>>   --
> >>>>   Steven Toth - Kernel Labs
> >>>>   http://www.kernellabs.com
> >>>   --
> >>>   Nikita Orlov
> >>>   Skype: nik_stet
> >>>   QQ: 2717846083
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> >
> > --
> > Nikita Orlov
> > Skype: nik_stet
> > QQ: 2717846083
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> -- 
> Nikita Orlov
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