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+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2022, Raspberry Pi Ltd
+ *
+ * statistics.h - Raspberry Pi generic statistics structure
+ */
+#pragma once
+
+#include <memory>
+#include <stdint.h>
+#include <vector>
+
+#include "histogram.h"
+#include "region_stats.h"
+
+namespace RPiController {
+
+struct RgbySums {
+ RgbySums(uint64_t _rSum = 0, uint64_t _gSum = 0, uint64_t _bSum = 0, uint64_t _ySum = 0)
+ : rSum(_rSum), gSum(_gSum), bSum(_bSum), ySum(_ySum)
+ {
+ }
+ uint64_t rSum;
+ uint64_t gSum;
+ uint64_t bSum;
+ uint64_t ySum;
+};
+
+using RgbyRegions = RegionStats<RgbySums>;
+using FocusRegions = RegionStats<uint64_t>;
+
+struct Statistics {
+ /*
+ * All region based statistics are normalised to 16-bits, giving a
+ * maximum value of (1 << NormalisationFactorPow2) - 1.
+ */
+ static constexpr unsigned int NormalisationFactorPow2 = 16;
+
+ /*
+ * Positioning of the AGC statistics gathering in the pipeline:
+ * Pre-WB correction or post-WB correction.
+ * Assume this is post-LSC.
+ */
+ enum class AgcStatsPos { PreWb, PostWb };
+ const AgcStatsPos agcStatsPos;
+
+ /*
+ * Positioning of the AWB/ALSC statistics gathering in the pipeline:
+ * Pre-LSC or post-LSC.
+ */
+ enum class ColourStatsPos { PreLsc, PostLsc };
+ const ColourStatsPos colourStatsPos;
+
+ Statistics(AgcStatsPos a, ColourStatsPos c)
+ : agcStatsPos(a), colourStatsPos(c)
+ {
+ }
+
+ /* Histogram statistics. Not all histograms may be populated! */
+ Histogram rHist;
+ Histogram gHist;
+ Histogram bHist;
+ Histogram yHist;
+
+ /* Row sums for flicker avoidance. */
+ std::vector<RgbySums> rowSums;
+
+ /* Region based colour sums. */
+ RgbyRegions agcRegions;
+ RgbyRegions awbRegions;
+
+ /* Region based focus FoM. */
+ FocusRegions focusRegions;
+};
+
+} /* namespace RPiController */