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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Ideas on Board Oy
+ *
+ * agc.h - Mali C55 AGC/AEC mean-based control algorithm
+ */
+
+#pragma once
+
+#include <libcamera/base/utils.h>
+
+#include "libcamera/internal/bayer_format.h"
+
+#include "libipa/agc_mean_luminance.h"
+#include "libipa/histogram.h"
+
+#include "algorithm.h"
+#include "ipa_context.h"
+
+namespace libcamera {
+
+namespace ipa::mali_c55::algorithms {
+
+class AgcStatistics
+{
+public:
+ AgcStatistics()
+ {
+ }
+
+ int setBayerOrderIndices(BayerFormat::Order bayerOrder);
+ uint32_t decodeBinValue(uint16_t binVal);
+ void parseStatistics(const mali_c55_stats_buffer *stats);
+
+ Histogram rHist;
+ Histogram gHist;
+ Histogram bHist;
+ Histogram yHist;
+private:
+ unsigned int rIndex_;
+ unsigned int grIndex_;
+ unsigned int gbIndex_;
+ unsigned int bIndex_;
+};
+
+class Agc : public Algorithm, public AgcMeanLuminance
+{
+public:
+ Agc();
+ ~Agc() = default;
+
+ int init(IPAContext &context, const YamlObject &tuningData) override;
+ int configure(IPAContext &context,
+ const IPACameraSensorInfo &configInfo) override;
+ void queueRequest(IPAContext &context, const uint32_t frame,
+ IPAFrameContext &frameContext,
+ const ControlList &controls) override;
+ void prepare(IPAContext &context, const uint32_t frame,
+ IPAFrameContext &frameContext,
+ mali_c55_params_buffer *params) override;
+ void process(IPAContext &context, const uint32_t frame,
+ IPAFrameContext &frameContext,
+ const mali_c55_stats_buffer *stats,
+ ControlList &metadata) override;
+
+private:
+ double estimateLuminance(const double gain) const override;
+ size_t fillGainParamBlock(IPAContext &context,
+ IPAFrameContext &frameContext,
+ mali_c55_params_block block);
+ size_t fillParamsBuffer(mali_c55_params_block block,
+ enum mali_c55_param_block_type type);
+ size_t fillWeightsArrayBuffer(mali_c55_params_block block,
+ enum mali_c55_param_block_type type);
+
+ AgcStatistics statistics_;
+};
+
+} /* namespace ipa::mali_c55::algorithms */
+
+} /* namespace libcamera */