[Libva] [PATCH 1/6 v2 libva] test: fix an issue in loading NV12 surface

[Xiang, Haihao]

Could you double-check the issue in loading surface ? I think you are
fixing the issue for YV12 surface.

> ---
>  test/loadsurface.h |   28 ++++++++++++++++++++++------
>  1 files changed, 22 insertions(+), 6 deletions(-)
>  mode change 100644 => 100755 test/loadsurface.h
> 
> diff --git a/test/loadsurface.h b/test/loadsurface.h
> old mode 100644
> new mode 100755
> index 2cd09c3..2ffdc21
> --- a/test/loadsurface.h
> +++ b/test/loadsurface.h
> @@ -220,21 +220,37 @@ static int upload_surface(VADisplay va_dpy, VASurfaceID surface_id,
>      VAImage surface_image;
>      void *surface_p=NULL, *U_start,*V_start;
>      VAStatus va_status;
> +    unsigned int pitches[3];
>      
>      va_status = vaDeriveImage(va_dpy,surface_id,&surface_image);
>      CHECK_VASTATUS(va_status,"vaDeriveImage");
>  
>      vaMapBuffer(va_dpy,surface_image.buf,&surface_p);
>      assert(VA_STATUS_SUCCESS == va_status);
> -        
> -    U_start = (char *)surface_p + surface_image.offsets[1];
> -    V_start = (char *)surface_p + surface_image.offsets[2];
> +
> +    pitches[0] = surface_image.pitches[0];
> +    switch (surface_image.format.fourcc) {
> +    case VA_FOURCC_NV12:
> +        U_start = (char *)surface_p + surface_image.offsets[1];
> +        V_start = U_start + 1;
> +        pitches[1] = surface_image.pitches[1];
> +        pitches[2] = surface_image.pitches[1];
> +        break;
> +    case VA_FOURCC_YV12:
> +        U_start = (char *)surface_p + surface_image.offsets[2];
> +        V_start = (char *)surface_p + surface_image.offsets[1];
> +        pitches[1] = surface_image.pitches[2];
> +        pitches[2] = surface_image.pitches[1];
> +        break;

Could you also add the support for I420 ?

> +    default:
> +        assert(0);
> +    }
>  
>      /* assume surface is planar format */
>      yuvgen_planar(surface_image.width, surface_image.height,
> -                  (unsigned char *)surface_p, surface_image.pitches[0],
> -                  (unsigned char *)U_start, surface_image.pitches[1],
> -                  (unsigned char *)V_start, surface_image.pitches[2],
> +                  (unsigned char *)surface_p, pitches[0],
> +                  (unsigned char *)U_start, pitches[1],
> +                  (unsigned char *)V_start, pitches[2],
>                    (surface_image.format.fourcc==VA_FOURCC_NV12),
>                    box_width, row_shift, field);
>