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Diffstat (limited to 'src/ipa/raspberrypi/controller/rpi/awb.h')
| -rw-r--r-- | src/ipa/raspberrypi/controller/rpi/awb.h | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/src/ipa/raspberrypi/controller/rpi/awb.h b/src/ipa/raspberrypi/controller/rpi/awb.h deleted file mode 100644 index e7d49cd8..00000000 --- a/src/ipa/raspberrypi/controller/rpi/awb.h +++ /dev/null @@ -1,191 +0,0 @@ -/* SPDX-License-Identifier: BSD-2-Clause */ -/* - * Copyright (C) 2019, Raspberry Pi Ltd - * - * awb.h - AWB control algorithm - */ -#pragma once - -#include <mutex> -#include <condition_variable> -#include <thread> - -#include "../awb_algorithm.h" -#include "../pwl.h" -#include "../awb_status.h" -#include "../statistics.h" - -namespace RPiController { - -/* Control algorithm to perform AWB calculations. */ - -struct AwbMode { - int read(const libcamera::YamlObject ¶ms); - double ctLo; /* low CT value for search */ - double ctHi; /* high CT value for search */ -}; - -struct AwbPrior { - int read(const libcamera::YamlObject ¶ms); - double lux; /* lux level */ - Pwl prior; /* maps CT to prior log likelihood for this lux level */ -}; - -struct AwbConfig { - AwbConfig() : defaultMode(nullptr) {} - int read(const libcamera::YamlObject ¶ms); - /* Only repeat the AWB calculation every "this many" frames */ - uint16_t framePeriod; - /* number of initial frames for which speed taken as 1.0 (maximum) */ - uint16_t startupFrames; - unsigned int convergenceFrames; /* approx number of frames to converge */ - double speed; /* IIR filter speed applied to algorithm results */ - bool fast; /* "fast" mode uses a 16x16 rather than 32x32 grid */ - Pwl ctR; /* function maps CT to r (= R/G) */ - Pwl ctB; /* function maps CT to b (= B/G) */ - Pwl ctRInverse; /* inverse of ctR */ - Pwl ctBInverse; /* inverse of ctB */ - /* table of illuminant priors at different lux levels */ - std::vector<AwbPrior> priors; - /* AWB "modes" (determines the search range) */ - std::map<std::string, AwbMode> modes; - AwbMode *defaultMode; /* mode used if no mode selected */ - /* - * minimum proportion of pixels counted within AWB region for it to be - * "useful" - */ - double minPixels; - /* minimum G value of those pixels, to be regarded a "useful" */ - uint16_t minG; - /* - * number of AWB regions that must be "useful" in order to do the AWB - * calculation - */ - uint32_t minRegions; - /* clamp on colour error term (so as not to penalise non-grey excessively) */ - double deltaLimit; - /* step size control in coarse search */ - double coarseStep; - /* how far to wander off CT curve towards "more purple" */ - double transversePos; - /* how far to wander off CT curve towards "more green" */ - double transverseNeg; - /* - * red sensitivity ratio (set to canonical sensor's R/G divided by this - * sensor's R/G) - */ - double sensitivityR; - /* - * blue sensitivity ratio (set to canonical sensor's B/G divided by this - * sensor's B/G) - */ - double sensitivityB; - /* The whitepoint (which we normally "aim" for) can be moved. */ - double whitepointR; - double whitepointB; - bool bayes; /* use Bayesian algorithm */ -}; - -class Awb : public AwbAlgorithm -{ -public: - Awb(Controller *controller = NULL); - ~Awb(); - char const *name() const override; - void initialise() override; - int read(const libcamera::YamlObject ¶ms) override; - unsigned int getConvergenceFrames() const override; - void setMode(std::string const &name) override; - void setManualGains(double manualR, double manualB) override; - void enableAuto() override; - void disableAuto() override; - void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; - void prepare(Metadata *imageMetadata) override; - void process(StatisticsPtr &stats, Metadata *imageMetadata) override; - struct RGB { - RGB(double r = 0, double g = 0, double b = 0) - : R(r), G(g), B(b) - { - } - double R, G, B; - RGB &operator+=(RGB const &other) - { - R += other.R, G += other.G, B += other.B; - return *this; - } - }; - -private: - bool isAutoEnabled() const; - /* configuration is read-only, and available to both threads */ - AwbConfig config_; - std::thread asyncThread_; - void asyncFunc(); /* asynchronous thread function */ - std::mutex mutex_; - /* condvar for async thread to wait on */ - std::condition_variable asyncSignal_; - /* condvar for synchronous thread to wait on */ - std::condition_variable syncSignal_; - /* for sync thread to check if async thread finished (requires mutex) */ - bool asyncFinished_; - /* for async thread to check if it's been told to run (requires mutex) */ - bool asyncStart_; - /* for async thread to check if it's been told to quit (requires mutex) */ - bool asyncAbort_; - - /* - * The following are only for the synchronous thread to use: - * for sync thread to note its has asked async thread to run - */ - bool asyncStarted_; - /* counts up to framePeriod before restarting the async thread */ - int framePhase_; - int frameCount_; /* counts up to startup_frames */ - AwbStatus syncResults_; - AwbStatus prevSyncResults_; - std::string modeName_; - /* - * The following are for the asynchronous thread to use, though the main - * thread can set/reset them if the async thread is known to be idle: - */ - void restartAsync(StatisticsPtr &stats, double lux); - /* copy out the results from the async thread so that it can be restarted */ - void fetchAsyncResults(); - StatisticsPtr statistics_; - AwbMode *mode_; - double lux_; - AwbStatus asyncResults_; - void doAwb(); - void awbBayes(); - void awbGrey(); - void prepareStats(); - double computeDelta2Sum(double gainR, double gainB); - Pwl interpolatePrior(); - double coarseSearch(Pwl const &prior); - void fineSearch(double &t, double &r, double &b, Pwl const &prior); - std::vector<RGB> zones_; - std::vector<Pwl::Point> points_; - /* manual r setting */ - double manualR_; - /* manual b setting */ - double manualB_; -}; - -static inline Awb::RGB operator+(Awb::RGB const &a, Awb::RGB const &b) -{ - return Awb::RGB(a.R + b.R, a.G + b.G, a.B + b.B); -} -static inline Awb::RGB operator-(Awb::RGB const &a, Awb::RGB const &b) -{ - return Awb::RGB(a.R - b.R, a.G - b.G, a.B - b.B); -} -static inline Awb::RGB operator*(double d, Awb::RGB const &rgb) -{ - return Awb::RGB(d * rgb.R, d * rgb.G, d * rgb.B); -} -static inline Awb::RGB operator*(Awb::RGB const &rgb, double d) -{ - return d * rgb; -} - -} /* namespace RPiController */ |