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diff --git a/src/ipa/raspberrypi/controller/rpi/noise.h b/src/ipa/raspberrypi/controller/rpi/noise.h
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+++ b/src/ipa/raspberrypi/controller/rpi/noise.h
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+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * noise.h - Noise control algorithm
+ */
+#pragma once
+
+#include "../algorithm.h"
+#include "../noise_status.h"
+
+/* This is our implementation of the "noise algorithm". */
+
+namespace RPiController {
+
+class Noise : public Algorithm
+{
+public:
+	Noise(Controller *controller);
+	char const *name() const override;
+	void switchMode(CameraMode const &cameraMode, Metadata *metadata) override;
+	void read(boost::property_tree::ptree const &params) override;
+	void prepare(Metadata *imageMetadata) override;
+
+private:
+	/* the noise profile for analogue gain of 1.0 */
+	double referenceConstant_;
+	double referenceSlope_;
+	double modeFactor_;
+};
+
+} /* namespace RPiController */