From afd2a5dac59a06c6897bdf7a3a1f35743192b608 Mon Sep 17 00:00:00 2001
From: Naushir Patuck <naush@raspberrypi.com>
Date: Wed, 27 Jul 2022 09:55:20 +0100
Subject: ipa: raspberrypi: Rename header files from *.hpp to *.h

As per the libcamera coding guidelines, rename all .hpp header files to .h.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/ipa/raspberrypi/controller/rpi/agc.h | 141 +++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 src/ipa/raspberrypi/controller/rpi/agc.h

(limited to 'src/ipa/raspberrypi/controller/rpi/agc.h')

diff --git a/src/ipa/raspberrypi/controller/rpi/agc.h b/src/ipa/raspberrypi/controller/rpi/agc.h
new file mode 100644
index 00000000..d6b19d6f
--- /dev/null
+++ b/src/ipa/raspberrypi/controller/rpi/agc.h
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * agc.h - AGC/AEC control algorithm
+ */
+#pragma once
+
+#include <vector>
+#include <mutex>
+
+#include <libcamera/base/utils.h>
+
+#include "../agc_algorithm.h"
+#include "../agc_status.h"
+#include "../pwl.h"
+
+/* This is our implementation of AGC. */
+
+/*
+ * This is the number actually set up by the firmware, not the maximum possible
+ * number (which is 16).
+ */
+
+#define AGC_STATS_SIZE 15
+
+namespace RPiController {
+
+struct AgcMeteringMode {
+	double weights[AGC_STATS_SIZE];
+	void read(boost::property_tree::ptree const &params);
+};
+
+struct AgcExposureMode {
+	std::vector<libcamera::utils::Duration> shutter;
+	std::vector<double> gain;
+	void read(boost::property_tree::ptree const &params);
+};
+
+struct AgcConstraint {
+	enum class Bound { LOWER = 0, UPPER = 1 };
+	Bound bound;
+	double qLo;
+	double qHi;
+	Pwl yTarget;
+	void read(boost::property_tree::ptree const &params);
+};
+
+typedef std::vector<AgcConstraint> AgcConstraintMode;
+
+struct AgcConfig {
+	void read(boost::property_tree::ptree const &params);
+	std::map<std::string, AgcMeteringMode> meteringModes;
+	std::map<std::string, AgcExposureMode> exposureModes;
+	std::map<std::string, AgcConstraintMode> constraintModes;
+	Pwl yTarget;
+	double speed;
+	uint16_t startupFrames;
+	unsigned int convergenceFrames;
+	double maxChange;
+	double minChange;
+	double fastReduceThreshold;
+	double speedUpThreshold;
+	std::string defaultMeteringMode;
+	std::string defaultExposureMode;
+	std::string defaultConstraintMode;
+	double baseEv;
+	libcamera::utils::Duration defaultExposureTime;
+	double defaultAnalogueGain;
+};
+
+class Agc : public AgcAlgorithm
+{
+public:
+	Agc(Controller *controller);
+	char const *name() const override;
+	void read(boost::property_tree::ptree const &params) override;
+	/* AGC handles "pausing" for itself. */
+	bool isPaused() const override;
+	void pause() override;
+	void resume() override;
+	unsigned int getConvergenceFrames() const override;
+	void setEv(double ev) override;
+	void setFlickerPeriod(libcamera::utils::Duration flickerPeriod) override;
+	void setMaxShutter(libcamera::utils::Duration maxShutter) override;
+	void setFixedShutter(libcamera::utils::Duration fixedShutter) override;
+	void setFixedAnalogueGain(double fixedAnalogueGain) override;
+	void setMeteringMode(std::string const &meteringModeName) override;
+	void setExposureMode(std::string const &exposureModeName) override;
+	void setConstraintMode(std::string const &contraintModeName) override;
+	void switchMode(CameraMode const &cameraMode, Metadata *metadata) override;
+	void prepare(Metadata *imageMetadata) override;
+	void process(StatisticsPtr &stats, Metadata *imageMetadata) override;
+
+private:
+	void updateLockStatus(DeviceStatus const &deviceStatus);
+	AgcConfig config_;
+	void housekeepConfig();
+	void fetchCurrentExposure(Metadata *imageMetadata);
+	void fetchAwbStatus(Metadata *imageMetadata);
+	void computeGain(bcm2835_isp_stats *statistics, Metadata *imageMetadata,
+			 double &gain, double &targetY);
+	void computeTargetExposure(double gain);
+	bool applyDigitalGain(double gain, double targetY);
+	void filterExposure(bool desaturate);
+	void divideUpExposure();
+	void writeAndFinish(Metadata *imageMetadata, bool desaturate);
+	libcamera::utils::Duration clipShutter(libcamera::utils::Duration shutter);
+	AgcMeteringMode *meteringMode_;
+	AgcExposureMode *exposureMode_;
+	AgcConstraintMode *constraintMode_;
+	uint64_t frameCount_;
+	AwbStatus awb_;
+	struct ExposureValues {
+		ExposureValues();
+
+		libcamera::utils::Duration shutter;
+		double analogueGain;
+		libcamera::utils::Duration totalExposure;
+		libcamera::utils::Duration totalExposureNoDG; /* without digital gain */
+	};
+	ExposureValues current_;  /* values for the current frame */
+	ExposureValues target_;   /* calculate the values we want here */
+	ExposureValues filtered_; /* these values are filtered towards target */
+	AgcStatus status_;
+	int lockCount_;
+	DeviceStatus lastDeviceStatus_;
+	libcamera::utils::Duration lastTargetExposure_;
+	double lastSensitivity_; /* sensitivity of the previous camera mode */
+	/* Below here the "settings" that applications can change. */
+	std::string meteringModeName_;
+	std::string exposureModeName_;
+	std::string constraintModeName_;
+	double ev_;
+	libcamera::utils::Duration flickerPeriod_;
+	libcamera::utils::Duration maxShutter_;
+	libcamera::utils::Duration fixedShutter_;
+	double fixedAnalogueGain_;
+};
+
+} /* namespace RPiController */
-- 
cgit v1.2.1