[FFmpeg-devel] [PATCH v2 1/2] lavf: make overlay_qsv work based on framesync

[Song, Ruiling]

> -----Original Message-----
> From: Song, Ruiling
> Sent: Tuesday, April 3, 2018 9:50 AM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Song, Ruiling <ruiling.song at intel.com>
> Subject: [PATCH v2 1/2] lavf: make overlay_qsv work based on framesync
> 
> The existing version which was cherry-picked from Libav does not work
> with FFmpeg framework, because ff_request_frame() was totally
> different between Libav (recursive) and FFmpeg (non-recursive).
> The existing overlay_qsv implementation depends on the recursive version
> of ff_request_frame to trigger immediate call to request_frame() on input pad.
> But this has been removed in FFmpeg since "lavfi: make request_frame() non-
> recursive."
> Now that we have handy framesync support in FFmpeg, so I make it work
> based on framesync. Some other fixing which is also needed to make
> overlay_qsv work are put in a separate patch.
> 
> v2:
> add .preinit field to initilize framesync options.
> export more options like vf_overlay.c
> 
> Signed-off-by: Ruiling Song <ruiling.song at intel.com>
> ---
>  libavfilter/Makefile         |   2 +-
>  libavfilter/vf_overlay_qsv.c | 213 ++++++++++++++++---------------------------
>  2 files changed, 78 insertions(+), 137 deletions(-)

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