Christian, the issue which trying to address here is vlvaGetImage doesn’t use
width/height
passed to function. box.width is calculated from surface and that will end up
in wrong stride for dst buffer
for said resolution. So was thinking to use aligned width/height for
vaCreateImage as well as surface.
But as you said that depends on codec , So I think either we can use
width/height aligned based on codec
or use passed width/height in vlvaGetImage to fix this issue.
Thanks,
Deepak
-----Original Message-----
From: Christian König <ckoenig.leichtzumer...@gmail.com>
Sent: Tuesday, October 2, 2018 3:42 AM
To: Sharma, Deepak <deepak.sha...@amd.com>; mesa-dev@lists.freedesktop.org
Cc: Guttula, Suresh <suresh.gutt...@amd.com>
Subject: Re: [Mesa-dev] [PATCH] st/va:Aligned image width and height to 16.
Am 02.10.2018 um 03:47 schrieb Sharma, Deepak:
> From: suresh guttula <suresh.gutt...@amd.com>
>
> In case of decoding of resolution like 40x24, while allocating surface
> video buffer is always aligned with macroblock width/height which is 16.
> But when application tries to get data after decoding through
> vaCreateImage /vaGetImage, image width/height aligned with 2 and
> result a smaller image buffer which causes the memory stomping issue.
Well NAK. It depends on the codec if the picture needs to be aligned to
16 or not.
For example VC-1 would created decoding errors with that.
Regards,
Christian.
>
> Signed-off-by: suresh guttula <suresh.gutt...@amd.com>
> ---
> src/gallium/state_trackers/va/image.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/src/gallium/state_trackers/va/image.c
> b/src/gallium/state_trackers/va/image.c
> index 3f892c9..2fc47b7 100644
> --- a/src/gallium/state_trackers/va/image.c
> +++ b/src/gallium/state_trackers/va/image.c
> @@ -123,8 +123,8 @@ vlVaCreateImage(VADriverContextP ctx, VAImageFormat
> *format, int width, int heig
> img->format = *format;
> img->width = width;
> img->height = height;
> - w = align(width, 2);
> - h = align(height, 2);
> + w = align(width, 16);
> + h = align(height, 16);
>
> switch (format->fourcc) {
> case VA_FOURCC('N','V','1','2'):
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