CVBR on DM365 DVSDK 4_02 encode demos

I am using dm365 dvsdk 4_02 encode demos

the demos is use " params -> rateControlPreset = IVIDEO_NONE;"

Now I want to use CVBR rate control mode . and I have seem the link :

http://processors.wiki.ti.com/index.php/DM36x_Rate_Control_Modes

I know the CVBR mode must set

 params->rateControlPreset=IVIDEO_USER_DEFINED;

rcAlgo = 3

but  in dvsdk encode demos code ,the struct VIDENCI_Params and VIDENCI_DynamicParams  have no the rcAlgo Parameter?

Any one who can help on this?

Thanks in advance!