IMX Scaler / CSC m2m driver.

[Florian Vaussard]

On 02/08/2016 01:40 PM, Víctor M. Jáquez L. wrote:
> On 02/08/16 at 01:28pm, Florian Vaussard wrote:
>>
>> On 02/08/2016 01:10 PM, Víctor M. Jáquez L. wrote:
>>> On 02/08/16 at 12:59pm, Florian Vaussard wrote:
>>>>
>>>> On 02/08/2016 11:34 AM, Víctor M. Jáquez L. wrote:
>>>>> On 02/08/16 at 08:32am, Florian Vaussard wrote:
>>>>>>
>>>>>> Currently I am using only v4l2videoNdec + fbdevsink. I am porting Philipp's
>>>>>> patches to linux 4.4 to get the IPU color converter but there is some work due
>>>>>> to recent changes in media and I am lacking time. So first I am looking at the
>>>>>> performances obtained by other people.
>>>>>>
>>>>>> I saw some out-of-tree DRM/KMS sinks [1][2] but they don't appear to be merged
>>>>>> in gstreamer and both appear to be 2 years old, thus it will probably take some
>>>>>> time to get them up and running :-/ Do you know any other alternatives?
>>>>>>
>>>>>> So before going into this, I just wanted to be sure that one can get good
>>>>>> performances at the end of the day without being trapped in a dead-end.
>>>>>
>>>>> Ehem :)
>>>>>
>>>>> https://bugzilla.gnome.org/show_bug.cgi?id=761059
>>>>>
>>>>
>>>> Oh sorry, missed that one! Great to see someone working on this :)
>>>>
>>>> You mentioned in your tests that you used imx6 with videodec and dmabuf import.
>>>> Do you have some performance figures for such pipelines?
>>>
>>> I haven't done strict perf analysis, just quick tops when pipeline are
>>> running, but there are big differences:
>>>
>>> videodec ! dmasink without dmabuf-import => ~45% CPU consumption
>>> videodec ! dmasink with dmabuf-import => ~6% CPU
>>>
>>
>> Great :) And are you able to play 1080p smoothly?
> 
> Do'h... I forgot to tell you that: my tests are with 720p
> 

And in that case does it run smoothly (~30 fps) ?

> I tried with 1080p, and though the decoder can handle it, the display I have
> doesn't. What I did in order to try it is to display only the area and it
> plays smoothly but I see some visual artifacts, like an upper band with a
> different color :/
> 

Good to know. I will see if I can find the time to test with my 1080p display.

Many thanks for your help!
Florian