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Diffstat (limited to 'src/ipa/raspberrypi/cam_helper.h')
| -rw-r--r-- | src/ipa/raspberrypi/cam_helper.h | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/src/ipa/raspberrypi/cam_helper.h b/src/ipa/raspberrypi/cam_helper.h deleted file mode 100644 index b3f8c980..00000000 --- a/src/ipa/raspberrypi/cam_helper.h +++ /dev/null @@ -1,132 +0,0 @@ -/* SPDX-License-Identifier: BSD-2-Clause */ -/* - * Copyright (C) 2019, Raspberry Pi Ltd - * - * cam_helper.h - helper class providing camera information - */ -#pragma once - -#include <memory> -#include <string> -#include <utility> - -#include <libcamera/base/span.h> -#include <libcamera/base/utils.h> - -#include "camera_mode.h" -#include "controller/controller.h" -#include "controller/metadata.h" -#include "md_parser.h" - -#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 &camName); - 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(const libcamera::utils::Duration exposure, - const libcamera::utils::Duration lineLength) const; - virtual libcamera::utils::Duration exposure(uint32_t exposureLines, - const libcamera::utils::Duration lineLength) const; - virtual std::pair<uint32_t, uint32_t> getBlanking(libcamera::utils::Duration &exposure, - libcamera::utils::Duration minFrameDuration, - libcamera::utils::Duration maxFrameDuration) const; - libcamera::utils::Duration hblankToLineLength(uint32_t hblank) const; - uint32_t lineLengthToHblank(const libcamera::utils::Duration &duration) const; - libcamera::utils::Duration lineLengthPckToDuration(uint32_t lineLengthPck) const; - virtual uint32_t gainCode(double gain) const = 0; - virtual double gain(uint32_t gainCode) const = 0; - virtual void getDelays(int &exposureDelay, int &gainDelay, - int &vblankDelay, int &hblankDelay) 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: - /* - * 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 *camName, - CamHelperCreateFunc createFunc); -}; - -} /* namespace RPi */ |