> 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.xi...@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@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/libva
>
>
>
>
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