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Diffstat (limited to 'src/ipa/raspberrypi/cam_helper.hpp')
| -rw-r--r-- | src/ipa/raspberrypi/cam_helper.hpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/src/ipa/raspberrypi/cam_helper.hpp b/src/ipa/raspberrypi/cam_helper.hpp deleted file mode 100644 index 300f8f8a..00000000 --- a/src/ipa/raspberrypi/cam_helper.hpp +++ /dev/null @@ -1,123 +0,0 @@ -/* 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 -// exposure time, and to convert between the sensor's gain codes and actual -// gains. -// -// A function to return the number of frames of delay between updating exposure, -// analogue gain and vblanking, and for the changes to take effect. For many -// sensors these take the values 2, 1 and 2 respectively, but sensors that are -// different will need to over-ride the default function provided. -// -// A function to query if the sensor outputs embedded data that can be parsed. -// -// A function to return the sensitivity of a given camera mode. -// -// A parser to parse the embedded data buffers provided by some sensors (for -// example, the imx219 does; the ov5647 doesn't). This allows us to know for -// sure the exposure and gain of the frame we're looking at. CamHelper -// provides functions for converting analogue gains to and from the sensor's -// native gain codes. -// -// Finally, a set of functions that determine how to handle the vagaries of -// different camera modules on start-up or when switching modes. Some -// modules may produce one or more frames that are not yet correctly exposed, -// or where the metadata may be suspect. We have the following functions: -// HideFramesStartup(): Tell the pipeline handler not to return this many -// frames at start-up. This can also be used to hide initial frames -// while the AGC and other algorithms are sorting themselves out. -// HideFramesModeSwitch(): Tell the pipeline handler not to return this -// many frames after a mode switch (other than start-up). Some sensors -// may produce innvalid frames after a mode switch; others may not. -// MistrustFramesStartup(): At start-up a sensor may return frames for -// which we should not run any control algorithms (for example, metadata -// may be invalid). -// MistrustFramesModeSwitch(): The number of frames, after a mode switch -// (other than start-up), for which control algorithms should not run -// (for example, metadata may be unreliable). - -class CamHelper -{ -public: - static CamHelper *Create(std::string const &cam_name); - CamHelper(std::unique_ptr<MdParser> parser, unsigned int frameIntegrationDiff); - virtual ~CamHelper(); - void SetCameraMode(const CameraMode &mode); - virtual void Prepare(libcamera::Span<const uint8_t> buffer, - Metadata &metadata); - virtual void Process(StatisticsPtr &stats, Metadata &metadata); - virtual uint32_t ExposureLines(libcamera::utils::Duration exposure) const; - virtual libcamera::utils::Duration Exposure(uint32_t exposure_lines) const; - virtual uint32_t GetVBlanking(libcamera::utils::Duration &exposure, - libcamera::utils::Duration minFrameDuration, - libcamera::utils::Duration maxFrameDuration) const; - virtual uint32_t GainCode(double gain) const = 0; - virtual double Gain(uint32_t gain_code) const = 0; - virtual void GetDelays(int &exposure_delay, int &gain_delay, - int &vblank_delay) const; - virtual bool SensorEmbeddedDataPresent() const; - virtual double GetModeSensitivity(const CameraMode &mode) const; - virtual unsigned int HideFramesStartup() const; - virtual unsigned int HideFramesModeSwitch() const; - virtual unsigned int MistrustFramesStartup() const; - virtual unsigned int MistrustFramesModeSwitch() const; - -protected: - void parseEmbeddedData(libcamera::Span<const uint8_t> buffer, - Metadata &metadata); - virtual void PopulateMetadata(const MdParser::RegisterMap ®isters, - Metadata &metadata) const; - - std::unique_ptr<MdParser> parser_; - CameraMode mode_; - -private: - bool initialized_; - /* - * Smallest difference between the frame length and integration time, - * in units of lines. - */ - unsigned int frameIntegrationDiff_; -}; - -// This is for registering camera helpers with the system, so that the -// CamHelper::Create function picks them up automatically. - -typedef CamHelper *(*CamHelperCreateFunc)(); -struct RegisterCamHelper -{ - RegisterCamHelper(char const *cam_name, - CamHelperCreateFunc create_func); -}; - -} // namespace RPi |