[Libva] [libva] How to avoid mem copy during h264 encode

[He Zhenwei]

Hi All,

I am new to libva. I am now asked to do an h264 encode.
There is example in the libva test folder. 
Anyway, I noticed that there is a memory copy  while uploading the source data, which cost quite lot of CPU time.
Is there anyway to avoid memcpy ?

Thanks a lot.

Andy