roundclosest_down
frame_params[pin].crop_left = roundclosest_down(
frame_params[pin].crop_top = roundclosest_down(
roundclosest_down(w / 2, IMGU_OSYS_DMA_CROP_W_LIMIT);
roundclosest_down(h / 2, IMGU_OSYS_DMA_CROP_H_LIMIT);