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How to send sequence instead of stream of sequence_item?

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background: I have a image processing IP that comes with a C model. C model takes an array input representing a picture and sends out an array representing a picture. RTL has a pixel-based ready-ready interface on both input and output side. 

My question is: What's the best-practice approach when building UVM-based DV environment for this IP? What I'm thinking is build an agent for the pixel-based interface, and in block-level environment, have a predictor that takes a sequence of pixel-level sequence_items, call C over DPI, and send out a stream of pixel-level items for checking. Test will be responsible for starting sequence on the agent's sequencer as well as sending sequence(as one object) to predictor. Is there any downside to this?

any suggestion is appreciated.

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