GfxSwap - for a built-in audio device

Hey guys,

I am evaluating what is most efficient way to process audio data. So I
found another example in the DDK 3790, GfxSwap.


It worked fine in swapping the playing out audio. Question is that How
can I change this code to swap the recording data? I think the basic
frame is
almost same. Am I right? Which part is need to be changed?


Also, can I install it in a built-in audio divices such as SigmaTel or
Intel AC'97


Thank you.