[Libva] Quality of the scaled H264 decoded image

[Ratin]

awesome, would like to see the result from HQ scaling sometime in the
future. I am just using putSurface, don't want to go thru Proc pipeline if
I don't have to. Is the performance penalty identical in both ways? Is
there a way I can measure how much GPU processing  (% and such) is being
utilized?
Thanks,

Ratin


On Tue, Feb 19, 2013 at 7:24 PM, Xiang, Haihao <haihao.xiang at intel.com>wrote:

>
>
> > I am using Intel_driver from the staging branch, on a Gen 3 HD4000. So
> > there other algorithms like bi-cubic is not supported?
>
> You can select another scaling method other than the default method via
> the flag to vaPutSurface() or the filter_flag in
> VAProcPipelineParameterBuffer.
>
> /* Scaling flags for vaPutSurface() */
> #define VA_FILTER_SCALING_DEFAULT       0x00000000
> #define VA_FILTER_SCALING_FAST          0x00000100
> #define VA_FILTER_SCALING_HQ            0x00000200
> #define VA_FILTER_SCALING_NL_ANAMORPHIC 0x00000300
> #define VA_FILTER_SCALING_MASK          0x00000f00
>
> In VAProcPipelineParameterBuffer:
>
>     * - Scaling: \c VA_FILTER_SCALING_DEFAULT, \c VA_FILTER_SCALING_FAST,
>      *   \c VA_FILTER_SCALING_HQ, \c VA_FILTER_SCALING_NL_ANAMORPHIC.
>      */
>     unsigned int        filter_flags;
>
> For Inter driver, Currently only VA_FILTER_SCALING_NL_ANAMORPHIC and
> VA_FILTER_SCALING_DEFAULT/VA_FILTER_SCALING_FAST  are supported.  We
> will add the support for VA_FILTER_SCALING_HQ.
>
> Thanks
> Haihao
>
> >
> >
> >
> > On Mon, Feb 18, 2013 at 12:11 AM, Xiang, Haihao
> > <haihao.xiang at intel.com> wrote:
> >         On Fri, 2013-02-15 at 16:18 -0800, Ratin wrote:
> >         > I am decoding a 720 P video stream from a camera to 1080 P
> >         surfaces
> >         > and displaying them on the screen. I am seeing noticable
> >         noise and
> >         > pulsating which is directly related to the I frame interval
> >         > (aparently), the lowest I-frame interval I can specify for
> >         the camera
> >         > is  1 second and selecting that in addition to bitrate of
> >         8192 kbps
> >         > makes is slightly better but still a lot of noise. A
> >         software
> >         > decoded/scaled video looks all smooth.
> >         >
> >         >
> >         > What I am wondering is what's the default scaling algorithm
> >         being used
> >         > in vaapi/intel driver and how do I specify better scaling
> >         algorithms
> >         > like bi-cubic etc.and possibly specify the strength of
> >         deblocking
> >         > filter level as well, and what can I do to reduce the
> >         pulsating ?
> >
> >
> >         Which driver are you using ? For Intel, it is bilinear.
> >
> >         >
> >         >
> >         >
> >         >
> >         > Any input would be much appreciated.
> >         >
> >         >
> >         > Thanks
> >         >
> >         >
> >         > Ratin
> >         >
> >         >
> >
> >         > _______________________________________________
> >         > Libva mailing list
> >         > Libva at lists.freedesktop.org
> >         > http://lists.freedesktop.org/mailman/listinfo/libva
> >
> >
> >
> >
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/libva/attachments/20130221/d9d97237/attachment.html>