[Libva] [PATCH Libva-intel-driver 1/4] Add the support of create surface based on YV16 format

[Xiang, Haihao]

It would be better to add a pre-defined fourcc code for YV16 in va.h

> Signed-off-by: Zhao Yakui <yakui.zhao at intel.com>
> ---
>  src/i965_drv_video.c | 26 +++++++++++++++++++++++++-
>  1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/src/i965_drv_video.c b/src/i965_drv_video.c
> index 0453c04..f306d91 100755
> --- a/src/i965_drv_video.c
> +++ b/src/i965_drv_video.c
> @@ -816,7 +816,8 @@ i965_surface_native_memory(VADriverContextP ctx,
>      // todo, should we disable tiling for 422 format?
>      if (expected_fourcc == VA_FOURCC('I', '4', '2', '0') ||
>          expected_fourcc == VA_FOURCC('I', 'Y', 'U', 'V') ||
> -        expected_fourcc == VA_FOURCC('Y', 'V', '1', '2'))
> +        expected_fourcc == VA_FOURCC('Y', 'V', '1', '2') ||
> +        expected_fourcc == VA_FOURCC('Y', 'V', '1', '6'))
>          tiling = 0;
>  		
>      i965_check_alloc_surface_bo(ctx, obj_surface, tiling, expected_fourcc, get_sampling_from_fourcc(expected_fourcc));
> @@ -963,6 +964,19 @@ i965_suface_external_memory(VADriverContextP ctx,
>  
>          break;
>  
> +    case VA_FOURCC('Y', 'V', '1', '6'):
> +        assert(memory_attibute->num_planes == 3);
> +        assert(memory_attibute->pitches[1] == memory_attibute->pitches[2]);
> +
> +        obj_surface->subsampling = SUBSAMPLE_YUV422H;
> +        obj_surface->y_cr_offset = memory_attibute->offsets[1] / obj_surface->width;
> +        obj_surface->y_cb_offset = memory_attibute->offsets[2] / obj_surface->width;
> +        obj_surface->cb_cr_width = obj_surface->orig_width / 2;
> +        obj_surface->cb_cr_height = obj_surface->orig_height;
> +        obj_surface->cb_cr_pitch = memory_attibute->pitches[1];
> +
> +        break;
> +
>      case VA_FOURCC('4', '2', '2', 'V'):
>          assert(memory_attibute->num_planes == 3);
>          assert(memory_attibute->pitches[1] == memory_attibute->pitches[2]);
> @@ -3047,6 +3061,15 @@ i965_check_alloc_surface_bo(VADriverContextP ctx,
>              region_height = obj_surface->height + obj_surface->height / 2;
>              break;
>  
> +        case VA_FOURCC('Y', 'V', '1', '6'):
> +            obj_surface->cb_cr_width = obj_surface->orig_width / 2;
> +            obj_surface->cb_cr_height = obj_surface->orig_height;
> +            obj_surface->y_cr_offset = obj_surface->height;
> +            obj_surface->y_cb_offset = obj_surface->y_cr_offset + ALIGN(obj_surface->cb_cr_height, 32) / 2;

y_cb_offset is the veritical offset in rows from the surface base
Address to the start of the cb plane in the allocated surface memory. so
it should be obj_surface->y_cb_offset = obj_surface->y_cr_offset +
ALIGN(obj_surface->cb_cr_height, 32). 

> +            obj_surface->cb_cr_pitch = obj_surface->width / 2;
> +            region_height = obj_surface->height + ALIGN(obj_surface->cb_cr_height, 32);

Need to fix region_height as well.


> +            break;
> +
>          case VA_FOURCC('Y', 'V', '1', '2'):
>          case VA_FOURCC('I', '4', '2', '0'):
>              if (fourcc == VA_FOURCC('Y', 'V', '1', '2')) {
> @@ -3340,6 +3363,7 @@ get_sampling_from_fourcc(unsigned int fourcc)
>      case VA_FOURCC('Y', 'U', 'Y', '2'):
>      case VA_FOURCC('U', 'Y', 'V', 'Y'):
>      case VA_FOURCC('4', '2', '2', 'H'):
> +    case VA_FOURCC('Y', 'V', '1', '6'):
>          surface_sampling = SUBSAMPLE_YUV422H;
>          break;
>      case VA_FOURCC('4', '2', '2', 'V'):