[FFmpeg-devel] [PATCH] avcodec/ac3enc: fix undefined negative left shift
Michael Niedermayer
michael at niedermayer.cc
Sat Oct 10 15:35:23 CEST 2015
On Fri, Oct 09, 2015 at 03:59:04PM -0400, Ganesh Ajjanagadde wrote:
> This should fix the undefined behavior reported in:
> https://trac.ffmpeg.org/ticket/4727.
>
> I can reproduce this at runtime: simply stick in an abort call in
> asym_quant to check if c < 0 and run FATE. I don't know ac3 so I can't
> confirm if negative coefficients are intentional, but at the moment they
> clearly are according to FATE.
>
> This resolves the undefined behavior. Tested with FATE.
>
> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
> ---
> libavcodec/ac3enc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
applied
thanks
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The misfortune of the wise is better than the prosperity of the fool.
-- Epicurus
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