[FFmpeg-devel] [PATCH v3] avfilter: add overlay vaapi filter

[Sun, Xinpeng]

Rebase and resend this patch. Fix some typo and indentation errors, and change some ambiguous statements in the document to make it more clear.

-Xinpeng 

> -----Original Message-----
> From: Sun, Xinpeng <xinpeng.sun at intel.com>
> Sent: Wednesday, February 26, 2020 1:54 PM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Sun, Xinpeng <xinpeng.sun at intel.com>; Zhou, Zachary
> <zachary.zhou at intel.com>
> Subject: [PATCH v3] avfilter: add overlay vaapi filter
> 
> Overlay one video on the top of another.
> 
> It takes two inputs and has one output. The first input is the "main" video on
> which the second input is overlaid. This filter requires same memory layout
> for all the inputs.
> 
> An example command to use this filter to overlay an image LOGO at the top-
> left corner of the INPUT video and both inputs are yuv420p format:
> FFMPEG -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -
> hwaccel_output_format vaapi \ -i INPUT -i LOGO -filter_complex \
> "[0:v]hwupload[a], [1:v]format=yuv420p, hwupload[b], [a][b]overlay_vaapi,
> hwdownload" \ OUTPUT
> 
> Signed-off-by: Xinpeng Sun <xinpeng.sun at intel.com>
> Signed-off-by: Zachary Zhou <zachary.zhou at intel.com>
> ---
>  configure                      |   3 +
>  doc/filters.texi               |  51 ++++
>  libavfilter/Makefile           |   1 +
>  libavfilter/allfilters.c       |   1 +
>  libavfilter/vf_overlay_vaapi.c | 426 +++++++++++++++++++++++++++++++++
>  5 files changed, 482 insertions(+)
>  create mode 100644 libavfilter/vf_overlay_vaapi.c
> 
[...]
> --
> 2.17.1