[FFmpeg-devel] [PATCH] avutil: fix data race in av_get_cpu_flags().

[wm4]

On Wed, 23 Nov 2016 11:40:25 -0800
Wan-Teh Chang <wtc-at-google.com at ffmpeg.org> wrote:

> On Tue, Nov 22, 2016 at 3:30 PM, wm4 <nfxjfg at googlemail.com> wrote:
> > On Tue, 22 Nov 2016 23:57:15 +0100
> > Michael Niedermayer <michael at niedermayer.cc> wrote:
> >  
> >> For example the progress code in the frame threading.  
> >
> > Which was recently fixed in Libav AFAIR...  
> 
> You're right. libav/libavcodec/pthread_frame.c has code similar to my
> ffmpeg patch http://ffmpeg.org/pipermail/ffmpeg-devel/2016-March/190454.html,
> and much more.
> 
> Note: libav/libavcodec/pthread_frame.c uses unnecessary (too strong)
> memory barriers in ff_thread_report_progress(). We can fix those when
> the code is merged to ffmpeg.

You could also just send a patch to them.