Function realsense_sys::rs2_start_processing_fptr

pub unsafe extern "C" fn rs2_start_processing_fptr(
    block: *mut rs2_processing_block, 
    on_frame: rs2_frame_callback_ptr, 
    user: *mut c_void, 
    error: *mut *mut rs2_error
)

This method is used to direct the output from the processing block to some callback or sink object \param[in] block Processing block \param[in] on_frame Callback function to be invoked every time the processing block calls frame_ready \param[in] user User context for the callback (can be anything or null) \param[out] error if non-null, receives any error that occurs during this call, otherwise, errors are ignored