[FFmpeg-devel] avcodec/qsv: polling free synchronization

[Li, Zhong]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of Orlov,
> Andrey
> Sent: Monday, September 23, 2019 11:20 PM
> To: ffmpeg-devel at ffmpeg.org
> Subject: [FFmpeg-devel] avcodec/qsv: polling free synchronization
> 
> Hi all,
> 
> Please review the change, that fixes high CPU usage on AVC decode (18% -> 9%):
> https://github.com/andreyor/FFmpeg/commit/21014bcfa3cfa56b993d56c56971
> 67b889228f08
> 
> Thanks,
> Orlov, Andrey

Need to add detail explain why it work. 
It is only benefit to AVC decoder? I see you also changed AVC encoder code.
And how about other codec? Such as HEVC.