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diff --git a/src/libcamera/software_isp/debayer.cpp b/src/libcamera/software_isp/debayer.cpp
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Linaro Ltd
+ * Copyright (C) 2023, Red Hat Inc.
+ *
+ * Authors:
+ * Hans de Goede <hdegoede@redhat.com>
+ *
+ * debayer.cpp - debayer base class
+ */
+
+#include "debayer.h"
+
+namespace libcamera {
+
+/**
+ * \struct DebayerParams
+ * \brief Struct to hold the debayer parameters.
+ */
+
+/**
+ * \var DebayerParams::kGain10
+ * \brief const value for 1.0 gain
+ */
+
+/**
+ * \var DebayerParams::gainR
+ * \brief Red gain
+ *
+ * 128 = 0.5, 256 = 1.0, 512 = 2.0, etc.
+ */
+
+/**
+ * \var DebayerParams::gainG
+ * \brief Green gain
+ *
+ * 128 = 0.5, 256 = 1.0, 512 = 2.0, etc.
+ */
+
+/**
+ * \var DebayerParams::gainB
+ * \brief Blue gain
+ *
+ * 128 = 0.5, 256 = 1.0, 512 = 2.0, etc.
+ */
+
+/**
+ * \var DebayerParams::gamma
+ * \brief Gamma correction, 1.0 is no correction
+ */
+
+/**
+ * \class Debayer
+ * \brief Base debayering class
+ *
+ * Base class that provides functions for setting up the debayering process.
+ */
+
+LOG_DEFINE_CATEGORY(Debayer)
+
+Debayer::~Debayer()
+{
+}
+
+/**
+ * \fn int Debayer::configure(const StreamConfiguration &inputCfg, const std::vector<std::reference_wrapper<StreamConfiguration>> &outputCfgs)
+ * \brief Configure the debayer object according to the passed in parameters.
+ * \param[in] inputCfg The input configuration.
+ * \param[in] outputCfgs The output configurations.
+ *
+ * \return 0 on success, a negative errno on failure.
+ */
+
+/**
+ * \fn Size Debayer::patternSize(PixelFormat inputFormat)
+ * \brief Get the width and height at which the bayer pattern repeats.
+ * \param[in] inputFormat The input format.
+ *
+ * Valid sizes are: 2x2, 4x2 or 4x4.
+ *
+ * \return Pattern size or an empty size for unsupported inputFormats.
+ */
+
+/**
+ * \fn std::vector<PixelFormat> Debayer::formats(PixelFormat inputFormat)
+ * \brief Get the supported output formats.
+ * \param[in] inputFormat The input format.
+ *
+ * \return All supported output formats or an empty vector if there are none.
+ */
+
+/**
+ * \fn std::tuple<unsigned int, unsigned int> Debayer::strideAndFrameSize(const PixelFormat &outputFormat, const Size &size)
+ * \brief Get the stride and the frame size.
+ * \param[in] outputFormat The output format.
+ * \param[in] size The output size.
+ *
+ * \return A tuple of the stride and the frame size, or a tuple with 0,0 if
+ *    there is no valid output config.
+ */
+
+/**
+ * \fn void Debayer::process(FrameBuffer *input, FrameBuffer *output, DebayerParams params)
+ * \brief Process the bayer data into the requested format.
+ * \param[in] input The input buffer.
+ * \param[in] output The output buffer.
+ * \param[in] params The parameters to be used in debayering.
+ *
+ * \note DebayerParams is passed by value deliberately so that a copy is passed
+ * when this is run in another thread by invokeMethod().
+ */
+
+/**
+ * \fn virtual SizeRange Debayer::sizes(PixelFormat inputFormat, const Size &inputSize)
+ * \brief Get the supported output sizes for the given input format and size.
+ * \param[in] inputFormat The input format.
+ * \param[in] inputSize The input size.
+ *
+ * \return The valid size ranges or an empty range if there are none.
+ */
+
+/**
+ * \var Signal<FrameBuffer *> Debayer::inputBufferReady
+ * \brief Signals when the input buffer is ready.
+ */
+
+/**
+ * \var Signal<FrameBuffer *> Debayer::outputBufferReady
+ * \brief Signals when the output buffer is ready.
+ */
+
+} /* namespace libcamera */