[FFmpeg-devel] [PATCH] libavfilter/vaapi: enable vaapi rotation feature via call Intel iHD driver

[Li, Zhong]

> From: ffmpeg-devel [mailto:ffmpeg-devel-bounces at ffmpeg.org] On Behalf
> Of Moritz Barsnick
> Sent: Tuesday, October 23, 2018 8:32 PM
> To: FFmpeg development discussions and patches
> <ffmpeg-devel at ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [PATCH] libavfilter/vaapi: enable vaapi rotation
> feature via call Intel iHD driver
> 
> On Tue, Oct 23, 2018 at 09:56:04 +0000, Li, Zhong wrote:
> > Not sure vaapi can expose more angles or not.
> 
> VAAPI's rotation_state only supports those four "angles":
> http://01org.github.io/libva_staging_doxygen/struct__VAProcPipelineParam
> eterBuffer.html#ae05cc1f2189c9e85339f7c63e9a61e1c 

Yup, I know. I mean vaapi is kept in evolution. I am not sure future version VAAPI will introduce more angles or not.

> 
> > But using similar options/suboptions should be a good idea.
> 
> Great.
> 
> BTW, you could also introduce filters similar to hflip/vflip by using
> VAProcPipelineParameterBuffer::mirror_state.

Good suggestion, :). 
> 
> Moritz