SADF focuse to process stream data. SADF uses packet oriented processing.

SADF signal processing concept shown on the picture.

As shown on the picture, every SADF Block takes packet of data from the input buffer that contain N samples, process N samples in one execution, and store processed samples to the output buffer. Next time, when N samples will come to the input buffer, SADF block will be executed again.

 Depends on the output Type, block can define size of it's output buffer, will be next block executed or not, etc.