[Mesa-dev] [PATCH 1/2] vl: add a lanczos interpolation filter v3

[Nayan Deshmukh]

Hi Andy,


On Thu, Aug 4, 2016 at 8:48 PM, Andy Furniss <adf.lists at gmail.com> wrote:

> Nayan Deshmukh wrote:
>
>> Hi Andy,
>>
>> Thanks for testing my patches.
>>
>
> NP
>
>
> The scaling happens after CSC.
>>>
>>
> OK, thanks.
>
>
> I believe there is some misunderstanding here, I was able to see the
>> artifacts in the video that you sent me previously. But I was not
>> able to replicate them
>>
>
> Yea, I got that - just thought you may want to see how they had changed.
>
> with the pendulum video on my system. Same case this time the
>> pendulum video plays fine this time too. I am attacing a video of it
>> here
>>
>> https://drive.google.com/file/d/0B1s62k5GtdBwOVAtOUVaU0V5c1E
>> /view?usp=sharing
>>
>
> Hmm, that's interesting for a few reasons.
>
> Though my monitor won't do 1366x768 I can replicate the same scale
> factor windowed with mplayer ... -xy 768/576 ...
>
> At first glance only level 2 is obviously artifacted (though very close
> inspection shows others are slightly).
>
> Levels: for some reason your vid has the black bars at 0 but the content
> isn't scaled - like your mplayer didn't expand tv to pc on playback.
> This shouldn't happen by default. Do you have some extra config
> somewhere like in $HOME/.mplayer, if so maybe better to test without.
>
> Most important - though the vp9 compression may be to blame I can't
> really see any difference between the levels in that vid.
>
> In fact closely comparing just your level 1 to my (admittedly
> uncompressed) level 1 and 0 output scaled the same plus unstretched
> levels wise it looks to me like you are getting level 0 on this test.
>

You are right it I am getting level 0 only. I have a PRIME configuration
and I forgot to set DRI_PRIME to 1. But for some reason, I am not able to
create
a screen recording when I use my AMD card. So, for now, I can't reproduce
the artifacts
you are having so can't debug them too :(

Regards,
Nayan.
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