[FFmpeg-devel] [PATCH] lavc/vvc: Remove left shifts of negative values

[James Almer]

On 1/20/2024 11:51 AM, post at frankplowman.com wrote:
> From: Frank Plowman <post at frankplowman.com>
> 
> VVC specifies << as arithmetic left shift, i.e. x << y is equivalent to
> x * pow2(y).  C's << on the other hand has UB if x is negative.  This
> patch removes all UB resulting from this, mostly by replacing x << y
> with x * (1 << y), but there are also a couple places where the OOP was
> changed instead.
> 
> Signed-off-by: Frank Plowman <post at frankplowman.com>
> ---
>   libavcodec/vvc/vvc_ctu.c            |  4 +--
>   libavcodec/vvc/vvc_filter.c         |  4 +--
>   libavcodec/vvc/vvc_inter.c          | 24 +++++++--------
>   libavcodec/vvc/vvc_inter_template.c |  4 +--
>   libavcodec/vvc/vvc_mvs.c            | 46 ++++++++++++++---------------
>   5 files changed, 41 insertions(+), 41 deletions(-)

Applied, thanks.