8bit or 10bit image data in PX4Flow

Dear all,
I want to ask the image data width handled in PX4flow module. The schematic tells that all MT9V034 dvp data ports, DCMI 0~9 (10bits), are connected to the MCU. But the firmware seems to manipulate 8bit data, as shown in the following screenshot. And as I recall, the 8bit data is normal RGB data, and 10bit is raw, which has to be manipulated in advance to transform it to RGB. So this confuses me. How and what data width does firmware handle?