[FFmpeg-devel] [PATCH v2] configure: Clearer documentation for "disable-safe-bitstream-reader"

Michael Niedermayer michael at niedermayer.cc
Sat Apr 12 03:11:32 EEST 2025


On Fri, Apr 11, 2025 at 08:32:55AM +0200, Andreas Rheinhardt wrote:
> Michael Niedermayer:
> > Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> > ---
> >  configure | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/configure b/configure
> > index bd4f8723760..f1db8b6f235 100755
> > --- a/configure
> > +++ b/configure
> > @@ -436,7 +436,8 @@ Advanced options (experts only):
> >    --enable-hardcoded-tables use hardcoded tables instead of runtime generation
> >    --disable-safe-bitstream-reader
> >                             disable buffer boundary checking in bitreaders
> > -                           (faster, but may crash)
> > +                           (This disables some security checks and can cause undefined behavior,
> > +                            it may be faster, but should only be used with trusted input)
> >    --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
> >  
> >  Optimization options (experts only):
> 
> I'd like to keep "crash" in the description. Not everyone (not even
> people setting "experts only" options) will be familiar with the term
> "undefined behavior".

what about:

(This disables some security checks and can cause undefined behavior and
 crashes, it may be faster, but should only be used with trusted input)

?

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I am the wisest man alive, for I know one thing, and that is that I know
nothing. -- Socrates
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