Tunneling support

Referring to the OpenMax spec ver1.0,section, if component B is made the buffer supplier,then the communication is initiated by calling OMX_FillThisbuffer on the o/p port of the component A .

I found this type of initiation not supported in both the latest and older version of the bellagio implementation.(referring to the omx_twoport_BufferMgmt function).

Am I right in noticing that or have overlooked it?