NvBufferTransform_Filter problem

Hi Nvidia:
Tegra_multimedia_API is used. would you explain the means below:
1、NvBufferTransform_Filter_Nearest;
2、NvBufferTransform_Filter_Bilinear;
3、NvBufferTransform_Filter_5_Tap;
4、NvBufferTransform_Filter_10_Tap;
5、NvBufferTransform_Filter_Smart;
6、NvBufferTransform_Filter_Nicest;

the document about it is too simple as below:
1、transform filter nearest;
2、transform filter bilinear;
3、transform filter 5 tap;
4、transform filter 10 tap;
5、transform filter smart;
6、transform filter nicest;

I still not understand it, please explain it in detail.
Expexted your reply ! Thaks a lot!

Feng, baoying,

This is sampling algorithm in VIC(used for layout conversion, scale, composition).

By default we use NvBufferTransform_Filter_Smart, if you want to tune quality, then you can choose algorithm in the list.