> From: ffmpeg-devel [mailto:[email protected]] On Behalf
> Of Linjie Fu
> Sent: Wednesday, April 10, 2019 7:56 PM
> To: [email protected]
> Cc: Fu, Linjie <[email protected]>
> Subject: [FFmpeg-devel] [PATCH, v2] lavu/hwcontext_qsv: Fix the realign
> check for hwupload
> 
> Fix the aligned check in hwupload, input surface should be 16 aligned too.
> 
> Fix #7830.
> 
> Signed-off-by: Linjie Fu <[email protected]>
> ---
> 
>  libavutil/hwcontext_qsv.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c index
> b6d8bfe2bf..8b000fe636 100644
> --- a/libavutil/hwcontext_qsv.c
> +++ b/libavutil/hwcontext_qsv.c
> @@ -892,7 +892,8 @@ static int
> qsv_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
>          return ret;
> 
> 
> -    if (src->height & 16 || src->linesize[0] & 16) {
> +    if (src->height & 15 || src->width & 15 ||
> +                            src->linesize[0] & 15) {

Should be better to use FFALIGN()

Another question is it really necessary to check width alignment if we already 
checked linesize to fix this issue?
(I guess it it not necessary, and if it is needed, many other places probably 
needed to be changed too.)
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