hi_mpi_isp_init

Applicable Products

Function

Initializes the ISP firmware.

Prototype

hi_s32 hi_mpi_isp_init(hi_vi_pipe vi_pipe)

Parameters

Returns

• 0: success
• Other values: failure. For details, see ISP System Control Return Codes.

Restrictions

• Call hi_mpi_isp_set_pub_attr to set public image attributes before calling this API.
• To ensure that resources are completely cleared before the previous process exits, you are advised to call hi_mpi_isp_exit before calling this API to initialize the ISP firmware.
• Multiple processes are not supported. This API must be called in the same process as hi_mpi_isp_sensor_reg_callback, hi_mpi_isp_run, hi_mpi_isp_exit, hi_mpi_ae_register, and hi_mpi_awb_register.
• This API cannot be called repeatedly.
• When the same vi_pipe is used, multiple threads cannot be used for ISP creation or destroying (multiple threads cannot call hi_mpi_isp_sensor_reg_callback, hi_mpi_isp_run, hi_mpi_isp_exit, hi_mpi_ae_register, and hi_mpi_awb_register at the same time).
• After the ISP is initialized, it takes one frame for the hardware to read the algorithm coefficient table. Therefore, within one frame after this API is called, hi_mpi_vi_stop_pipe cannot be called to stop the VI pipe.

Reference

For the API call sequence, see Video Data Obtaining.