Efficient scaling and/or conversion from YUV420 (NV12) to RGBA

[Michael Olbrich]

Hi,

On Thu, Aug 02, 2018 at 03:03:47PM +0200, Iñigo Huguet wrote:
> My kernel and Mali blob are quite old: kernel 3.4, mali blob r3p0. Do you
> know if with this versions the problem is, as you say, unsupported DMABuf
> importation? When graphics and video acceleration are available in mainline,
> and other things we need as well, we are planning to move to mainline, but
> for the moment it's not possible.
> 
> Do you really think that the bottleneck is glupload? With this pipeline I
> get over 25fps:
> 
> v4l2src device=/dev/video1 !
> video/x-raw,format=NV12,width=1440,height=1152,framerate=25/1 ! glupload !
> fakesink silent=false

I don't think that the buffers are actually uploaded here. You need to
force the memory:GLMemory caps feature. Otherwise glupload runs in bypass
mode.

Michael

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