mirror of
https://git.libcamera.org/libcamera/libcamera.git
synced 2025-07-23 16:45:07 +03:00
2f46dec949
This avoids a namespace clash with the RPi namespace used by the ipa and pipeline handlers, and cleans up the syntax slightly. There are no functional changes in this commit. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (C) 2019, Raspberry Pi (Trading) Limited
|
|
*
|
|
* alsc.hpp - ALSC (auto lens shading correction) control algorithm
|
|
*/
|
|
#pragma once
|
|
|
|
#include <mutex>
|
|
#include <condition_variable>
|
|
#include <thread>
|
|
|
|
#include "../algorithm.hpp"
|
|
#include "../alsc_status.h"
|
|
|
|
namespace RPiController {
|
|
|
|
// Algorithm to generate automagic LSC (Lens Shading Correction) tables.
|
|
|
|
struct AlscCalibration {
|
|
double ct;
|
|
double table[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
};
|
|
|
|
struct AlscConfig {
|
|
// Only repeat the ALSC 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;
|
|
// IIR filter speed applied to algorithm results
|
|
double speed;
|
|
double sigma_Cr;
|
|
double sigma_Cb;
|
|
double min_count;
|
|
uint16_t min_G;
|
|
double omega;
|
|
uint32_t n_iter;
|
|
double luminance_lut[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
double luminance_strength;
|
|
std::vector<AlscCalibration> calibrations_Cr;
|
|
std::vector<AlscCalibration> calibrations_Cb;
|
|
double default_ct; // colour temperature if no metadata found
|
|
double threshold; // iteration termination threshold
|
|
};
|
|
|
|
class Alsc : public Algorithm
|
|
{
|
|
public:
|
|
Alsc(Controller *controller = NULL);
|
|
~Alsc();
|
|
char const *Name() const override;
|
|
void Initialise() override;
|
|
void SwitchMode(CameraMode const &camera_mode, Metadata *metadata) override;
|
|
void Read(boost::property_tree::ptree const ¶ms) override;
|
|
void Prepare(Metadata *image_metadata) override;
|
|
void Process(StatisticsPtr &stats, Metadata *image_metadata) override;
|
|
|
|
private:
|
|
// configuration is read-only, and available to both threads
|
|
AlscConfig config_;
|
|
bool first_time_;
|
|
CameraMode camera_mode_;
|
|
double luminance_table_[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
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_;
|
|
// counts up to startup_frames
|
|
int frame_count_;
|
|
// counts up to startup_frames for Process method
|
|
int frame_count2_;
|
|
double sync_results_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
|
|
double prev_sync_results_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
|
|
void waitForAysncThread();
|
|
// 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, Metadata *image_metadata);
|
|
// copy out the results from the async thread so that it can be restarted
|
|
void fetchAsyncResults();
|
|
double ct_;
|
|
bcm2835_isp_stats_region statistics_[ALSC_CELLS_Y * ALSC_CELLS_X];
|
|
double async_results_[3][ALSC_CELLS_Y][ALSC_CELLS_X];
|
|
double async_lambda_r_[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
double async_lambda_b_[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
void doAlsc();
|
|
double lambda_r_[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
double lambda_b_[ALSC_CELLS_X * ALSC_CELLS_Y];
|
|
};
|
|
|
|
} // namespace RPiController
|