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diff --git a/src/ipa/ipu3/ipu3_agc.h b/src/ipa/ipu3/ipu3_agc.h
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+++ b/src/ipa/ipu3/ipu3_agc.h
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Ideas On Board
+ *
+ * ipu3_agc.h - IPU3 AGC/AEC control algorithm
+ */
+#ifndef __LIBCAMERA_IPU3_AGC_H__
+#define __LIBCAMERA_IPU3_AGC_H__
+
+#include <array>
+#include <unordered_map>
+
+#include <linux/intel-ipu3.h>
+
+#include <libcamera/geometry.h>
+
+#include "libipa/algorithm.h"
+
+namespace libcamera {
+
+namespace ipa::ipu3 {
+
+class IPU3Agc : public Algorithm
+{
+public:
+	IPU3Agc();
+	~IPU3Agc() = default;
+
+	void initialise(struct ipu3_uapi_grid_config &bdsGrid);
+	void process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, uint32_t &gain);
+	bool converged() { return converged_; }
+	bool updateControls() { return updateControls_; }
+	/* \todo Use a metadata exchange between IPAs */
+	double gamma() { return gamma_; }
+
+private:
+	void processBrightness(const ipu3_uapi_stats_3a *stats);
+	void filterExposure();
+	void lockExposureGain(uint32_t &exposure, uint32_t &gain);
+
+	struct ipu3_uapi_grid_config aeGrid_;
+
+	uint64_t frameCount_;
+	uint64_t lastFrame_;
+
+	bool converged_;
+	bool updateControls_;
+
+	double iqMean_;
+	double gamma_;
+
+	double prevExposure_;
+	double prevExposureNoDg_;
+	double currentExposure_;
+	double currentExposureNoDg_;
+};
+
+} /* namespace ipa::ipu3 */
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_IPU3_AGC_H__ */