[Libva] vaGetImage failed with VA_STATUS_ERROR_SURFACE_BUSY

[Xiang, Haihao]

Hi Chuanbo,

You are using vaDeriveImage() in a wrong way. Please refer to the
comment in va.h:

 * Calls to vaPutImage or vaGetImage using the same surface from 
 * which the image has been derived will return
 * A_STATUS_ERROR_SURFACE_BUSY.vaPutImage 
 * vaGetImage with other surfaces is supported.

You are suggested to use vaCreateImage() instead of vaDeriveImage(),
then call vaGetImage(). Or use VPP to translate the format from
VA_FOURCC_YUY2 to VA_FOURCC_NV12.

Thanks
Haihao




> Hi all,
> 
>                 I have a usage case of libva: I read camera frame to a
> VASurface (VA_FOURCC_YUY2 format), 
> 
> translate the format from VA_FOURCC_YUY2 to VA_FOURCC_NV12 and then
> show VASurface content 
> 
> to screen. The code of translating format is as below:
> 
>  
> 
>                 VAImage nv12_image;
> 
> va_status = vaDeriveImage(va_dpy, nv12_surface_id, &nv12_image);
> 
>                 va_status = vaGetImage (va_dpy, gray_bgra_surface_id,
> 0, 0, width, height, nv12_image.image_id);
> 
>  
> 
>                 It fails on vaGetImage with return value
> VA_STATUS_ERROR_SURFACE_BUSY. I dig into
> 
> intel-driver, and find it returns on the this line of i965_GetImage():
> 
>                 if (is_image_busy(i965, obj_image))
> 
>                                 return VA_STATUS_ERROR_SURFACE_BUSY;
> 
>  
> 
>                 Could you find a way to solve this problem? Because
> it’s the most convenient way I know translating
> 
> one format VASurface to another.
> 
>  
> 
> Thanks,
> 
> Chuanbo Weng
> 
>  
> 
> 
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