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Diffstat (limited to 'src/ipa/raspberrypi/controller/rpi/awb.hpp')
| -rw-r--r-- | src/ipa/raspberrypi/controller/rpi/awb.hpp | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/src/ipa/raspberrypi/controller/rpi/awb.hpp b/src/ipa/raspberrypi/controller/rpi/awb.hpp deleted file mode 100644 index ac3dca6f..00000000 --- a/src/ipa/raspberrypi/controller/rpi/awb.hpp +++ /dev/null @@ -1,179 +0,0 @@ -/* SPDX-License-Identifier: BSD-2-Clause */ -/* - * Copyright (C) 2019, Raspberry Pi (Trading) Limited - * - * awb.hpp - AWB control algorithm - */ -#pragma once - -#include <mutex> -#include <condition_variable> -#include <thread> - -#include "../awb_algorithm.hpp" -#include "../pwl.hpp" -#include "../awb_status.h" - -namespace RPiController { - -// Control algorithm to perform AWB calculations. - -struct AwbMode { - void Read(boost::property_tree::ptree const ¶ms); - double ct_lo; // low CT value for search - double ct_hi; // high CT value for search -}; - -struct AwbPrior { - void Read(boost::property_tree::ptree const ¶ms); - double lux; // lux level - Pwl prior; // maps CT to prior log likelihood for this lux level -}; - -struct AwbConfig { - AwbConfig() : default_mode(nullptr) {} - void Read(boost::property_tree::ptree const ¶ms); - // Only repeat the AWB calculation every "this many" frames - uint16_t frame_period; - // number of initial frames for which speed taken as 1.0 (maximum) - uint16_t startup_frames; - unsigned int convergence_frames; // 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 ct_r; // function maps CT to r (= R/G) - Pwl ct_b; // function maps CT to b (= B/G) - // 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 *default_mode; // mode used if no mode selected - // minimum proportion of pixels counted within AWB region for it to be - // "useful" - double min_pixels; - // minimum G value of those pixels, to be regarded a "useful" - uint16_t min_G; - // number of AWB regions that must be "useful" in order to do the AWB - // calculation - uint32_t min_regions; - // clamp on colour error term (so as not to penalise non-grey excessively) - double delta_limit; - // step size control in coarse search - double coarse_step; - // how far to wander off CT curve towards "more purple" - double transverse_pos; - // how far to wander off CT curve towards "more green" - double transverse_neg; - // red sensitivity ratio (set to canonical sensor's R/G divided by this - // sensor's R/G) - double sensitivity_r; - // blue sensitivity ratio (set to canonical sensor's B/G divided by this - // sensor's B/G) - double sensitivity_b; - // The whitepoint (which we normally "aim" for) can be moved. - double whitepoint_r; - double whitepoint_b; - bool bayes; // use Bayesian algorithm -}; - -class Awb : public AwbAlgorithm -{ -public: - Awb(Controller *controller = NULL); - ~Awb(); - char const *Name() const override; - void Initialise() override; - void Read(boost::property_tree::ptree const ¶ms) override; - // AWB handles "pausing" for itself. - bool IsPaused() const override; - void Pause() override; - void Resume() override; - unsigned int GetConvergenceFrames() const override; - void SetMode(std::string const &name) override; - void SetManualGains(double manual_r, double manual_b) override; - void SwitchMode(CameraMode const &camera_mode, Metadata *metadata) override; - void Prepare(Metadata *image_metadata) override; - void Process(StatisticsPtr &stats, Metadata *image_metadata) 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 async_thread_; - void asyncFunc(); // asynchronous thread function - std::mutex mutex_; - // condvar for async thread to wait on - std::condition_variable async_signal_; - // condvar for synchronous thread to wait on - std::condition_variable sync_signal_; - // for sync thread to check if async thread finished (requires mutex) - bool async_finished_; - // for async thread to check if it's been told to run (requires mutex) - bool async_start_; - // for async thread to check if it's been told to quit (requires mutex) - bool async_abort_; - - // The following are only for the synchronous thread to use: - // for sync thread to note its has asked async thread to run - bool async_started_; - // counts up to frame_period before restarting the async thread - int frame_phase_; - int frame_count_; // counts up to startup_frames - AwbStatus sync_results_; - AwbStatus prev_sync_results_; - std::string mode_name_; - // 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 async_results_; - void doAwb(); - void awbBayes(); - void awbGrey(); - void prepareStats(); - double computeDelta2Sum(double gain_r, double gain_b); - 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 manual_r_; - // manual b setting - double manual_b_; - bool first_switch_mode_; // is this the first call to SwitchMode? -}; - -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 |