177df04d2b
Refactor all the source files in src/ipa/raspberrypi/ to match the recommended formatting guidelines for the libcamera project. The vast majority of changes in this commit comprise of switching from snake_case to CamelCase, and starting class member functions with a lower case character. 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>
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2019, Raspberry Pi (Trading) Limited
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*
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* alsc.hpp - ALSC (auto lens shading correction) control algorithm
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*/
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#pragma once
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#include <mutex>
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#include <condition_variable>
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#include <thread>
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#include "../algorithm.hpp"
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#include "../alsc_status.h"
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namespace RPiController {
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// Algorithm to generate automagic LSC (Lens Shading Correction) tables.
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struct AlscCalibration {
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double ct;
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double table[ALSC_CELLS_X * ALSC_CELLS_Y];
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};
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struct AlscConfig {
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// Only repeat the ALSC calculation every "this many" frames
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uint16_t framePeriod;
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// number of initial frames for which speed taken as 1.0 (maximum)
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uint16_t startupFrames;
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// IIR filter speed applied to algorithm results
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double speed;
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double sigmaCr;
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double sigmaCb;
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double minCount;
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uint16_t minG;
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double omega;
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uint32_t nIter;
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double luminanceLut[ALSC_CELLS_X * ALSC_CELLS_Y];
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double luminanceStrength;
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std::vector<AlscCalibration> calibrationsCr;
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std::vector<AlscCalibration> calibrationsCb;
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double defaultCt; // colour temperature if no metadata found
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double threshold; // iteration termination threshold
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double lambdaBound; // upper/lower bound for lambda from a value of 1
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};
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class Alsc : public Algorithm
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{
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public:
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Alsc(Controller *controller = NULL);
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~Alsc();
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char const *name() const override;
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void initialise() override;
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void switchMode(CameraMode const &cameraMode, Metadata *metadata) override;
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void read(boost::property_tree::ptree const ¶ms) override;
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void prepare(Metadata *imageMetadata) override;
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void process(StatisticsPtr &stats, Metadata *imageMetadata) override;
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private:
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// configuration is read-only, and available to both threads
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AlscConfig config_;
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bool firstTime_;
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CameraMode cameraMode_;
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double luminanceTable_[ALSC_CELLS_X * ALSC_CELLS_Y];
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std::thread asyncThread_;
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void asyncFunc(); // asynchronous thread function
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std::mutex mutex_;
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// condvar for async thread to wait on
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std::condition_variable asyncSignal_;
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// condvar for synchronous thread to wait on
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std::condition_variable syncSignal_;
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// for sync thread to check if async thread finished (requires mutex)
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bool asyncFinished_;
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// for async thread to check if it's been told to run (requires mutex)
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bool asyncStart_;
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// for async thread to check if it's been told to quit (requires mutex)
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bool asyncAbort_;
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// The following are only for the synchronous thread to use:
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// for sync thread to note its has asked async thread to run
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bool asyncStarted_;
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// counts up to framePeriod before restarting the async thread
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int framePhase_;
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// counts up to startupFrames
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int frameCount_;
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// counts up to startupFrames for Process function
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int frameCount2_;
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double syncResults_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
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double prevSyncResults_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
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void waitForAysncThread();
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// The following are for the asynchronous thread to use, though the main
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// thread can set/reset them if the async thread is known to be idle:
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void restartAsync(StatisticsPtr &stats, Metadata *imageMetadata);
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// copy out the results from the async thread so that it can be restarted
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void fetchAsyncResults();
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double ct_;
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bcm2835_isp_stats_region statistics_[ALSC_CELLS_Y * ALSC_CELLS_X];
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double asyncResults_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
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double asyncLambdaR_[ALSC_CELLS_X * ALSC_CELLS_Y];
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double asyncLambdaB_[ALSC_CELLS_X * ALSC_CELLS_Y];
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void doAlsc();
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double lambdaR_[ALSC_CELLS_X * ALSC_CELLS_Y];
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double lambdaB_[ALSC_CELLS_X * ALSC_CELLS_Y];
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};
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} // namespace RPiController
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