src/ipa/raspberrypi/cam_helper.hpp


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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi (Trading) Limited
 *
 * cam_helper.hpp - helper class providing camera information
 */
#pragma once

#include <memory>
#include <string>

#include <libcamera/base/span.h>
#include <libcamera/base/utils.h>

#include "camera_mode.h"
#include "controller/controller.hpp"
#include "controller/metadata.hpp"
#include "md_parser.hpp"

#include "libcamera/internal/v4l2_videodevice.h"

namespace RPiController {

// The CamHelper class provides a number of facilities that anyone trying
// to drive a camera will need to know, but which are not provided by the
// standard driver framework. Specifically, it provides:
//
// A "CameraMode" structure to describe extra information about the chosen
// mode of the driver. For example, how it is cropped from the full sensor
// area, how it is scaled, whether pixels are averaged compared to the full
// resolution.
//
// The ability to convert between number of lines of exposure and actual