For details about the Programming APIs, see the Vitis AI Library Programming Guide (UG1355). You can download it from the Xilinx website https://www.xilinx.com/products/design-tools/vitis/vitis-ai.html.
Also, for the Vitis AI APIs, see the Vitis AI User Guide in the Vitis AI User Documentation (UG1431). You can download it from the Xilinx website https://www.xilinx.com/products/design-tools/vitis/vitis-ai.html.