Hi Nikita,
If I understand correctly, you want the buffer sharing between a cl_mem
and
a VASurface, right?
So you have two ways to do so:
1. Get the file description of cl_mem by extension clGetMemObjectFdIntel
Then use vaCreateSurfaces to create a VASurface from external GPU buffer
object
by filling the parameters "VASurfaceAttrib *attrib_list" and " unsigned
int num_attribs "
correctly. (Don't forget to close fd after using it.)
2. Create a VASURFACE in normal way by vaCreateSurfaces, then get its handle by
vaAcquireBufferHandle. After that, you can create a cl_mem by
clCreateImageFromLibvaIntel/
clCreateBufferFromLibvaIntel.
The second way need support from libva and libva-intel-driver, and part of code
still in
review. You should checkout to libva's offical staging branch, checkout to
libva-intel-driver's official
staging branch and apply this patch to libva-intel-driver:
http://lists.freedesktop.org/archives/libva/2014-June/002463.html
Thanks,
Chuanbo Weng
-----Original Message-----
From: Nikita Orlov [mailto:nikitos1...@yandex.ru]
Sent: Tuesday, June 17, 2014 17:44
To: Weng, Chuanbo; beignet@lists.freedesktop.org
Subject: Re: [Beignet] beignet-openCL and libva/VAAPI
Hi!
I will try. But in my task I need, not post-processing, but pre-processing.
I mean at first I am processing frame via some OpenCL kernel and than put it to
encoder.
Now I am downloading frame from GPU and than putting it to libva.
Is it possible with this versions to skip downloading in pre-processing case?
17.06.2014, 13:40, "Weng, Chuanbo" <chuanbo.w...@intel.com>:
> Hi Nikita,
> As the mail that you found said, currently libva/OpenCL buffer
> sharing is integrated in libva. Please note, you should clone the correct
> libva repo as following (not official libva):
> git://people.freedesktop.org/~yakuiz/libva
> Then you will see cl_branch in the tree. Then you can follow the steps
> to build and try OpenCL post-processing enabled libva.
>
> Thanks,
> Chuanbo Weng
>
> -----Original Message-----
> From: Beignet [mailto:beignet-boun...@lists.freedesktop.org] On Behalf
> Of Nikita Orlov
> Sent: Saturday, June 14, 2014 21:32
> To: beignet@lists.freedesktop.org
> Subject: Re: [Beignet] beignet-openCL and libva/VAAPI
>
> By the way, I have found this
> http://lists.freedesktop.org/archives/beignet/2013-October/001899.html
>
> So, as I understand libva can use beignet, but it is not very clear how
> latest versions are reliable for this feature.
> For example there is not ocl branch in libva repo.
>
> 14.06.2014, 17:07, "Nikita Orlov" <nikitos1...@yandex.ru>:
>> Hello!
>>
>> Anybody knows how are beignet and libva/vaapi related?
>> As I understand both of them use open source intel drivers.
>> Both of them can work without X.org or with it.
>>
>> But, will they share gpu resources? or video encoder/decoder in intel cpu
>> is separated from gpu unit?
>>
>> --
>> Nikita Orlov
>> Skype: nik_stet
>> QQ: 2717846083
>> _______________________________________________
>> Beignet mailing list
>> Beignet@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/beignet
>
> --
> Nikita Orlov
> Skype: nik_stet
> QQ: 2717846083
> _______________________________________________
> Beignet mailing list
> Beignet@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/beignet
--
Nikita Orlov
Skype: nik_stet
QQ: 2717846083
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