From their github repository. Pipeline-C is:
A C-like(1) hardware description language (HDL)(2) adding high level synthesis(HLS)-like automatic pipelining(3) as a C language construct/compiler feature.
Video Cropping in Pipeline-C. View
Cropping and positioning a video stream.
A pixel stream from something like an OV2640 camera digital video port DVP is cropped to a selected area of the image, scaled up by an integer factor, and finally positioned somewhere in the output frame buffer.