ipa: rkisp1: Remove MatrixInterpolator

The MatrixInterpolator is no longer used. Remove it.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

3 files changed, 0 insertions, 225 deletions

diff --git a/src/ipa/libipa/matrix_interpolator.cpp b/src/ipa/libipa/matrix_interpolator.cpp
deleted file mode 100644
index d5188f8a..00000000
--- a/src/ipa/libipa/matrix_interpolator.cpp
+++ /dev/null
@@ -1,103 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-/*
- * Copyright (C) 2024, Paul Elder <paul.elder@ideasonboard.com>
- *
- * Helper class for interpolating maps of matrices
- */
-#include "matrix_interpolator.h"
-
-#include <libcamera/base/log.h>
-
-/**
- * \file matrix_interpolator.h
- * \brief Helper class for interpolating maps of matrices
- */
-
-namespace libcamera {
-
-LOG_DEFINE_CATEGORY(MatrixInterpolator)
-
-namespace ipa {
-
-/**
- * \class MatrixInterpolator
- * \brief Class for storing, retrieving, and interpolating matrices
- * \tparam T Type of numerical values to be stored in the matrices
- * \tparam R Number of rows in the matrices
- * \tparam C Number of columns in the matrices
- *
- * The main use case is to pass a map from color temperatures to corresponding
- * matrices (eg. color correction), and then requesting a matrix for a specific
- * color temperature. This class will abstract away the interpolation portion.
- */
-
-/**
- * \fn MatrixInterpolator::MatrixInterpolator(const std::map<unsigned int, Matrix<T, R, C>> &matrices)
- * \brief Construct a matrix interpolator from a map of matrices
- * \param matrices Map from which to construct the matrix interpolator
- */
-
-/**
- * \fn MatrixInterpolator::reset()
- * \brief Reset the matrix interpolator content to a single identity matrix
- */
-
-/**
- * \fn int MatrixInterpolator<T, R, C>::readYaml()
- * \brief Initialize an MatrixInterpolator instance from yaml
- * \tparam T Type of data stored in the matrices
- * \tparam R Number of rows of the matrices
- * \tparam C Number of columns of the matrices
- * \param[in] yaml The yaml object that contains the map of unsigned integers to matrices
- * \param[in] key_name The name of the key in the yaml object
- * \param[in] matrix_name The name of the matrix in the yaml object
- *
- * The yaml object is expected to be a list of maps. Each map has two or more
- * pairs: one of \a key_name to the key value (usually color temperature), and
- * one or more of \a matrix_name to the matrix. This is a bit difficult to
- * explain, so here is an example (in python, as it is easier to parse than
- * yaml):
- *       [
- *               {
- *                   'ct': 2860,
- *                   'ccm': [ 2.12089, -0.52461, -0.59629,
- *                           -0.85342,  2.80445, -0.95103,
- *                           -0.26897, -1.14788,  2.41685 ],
- *                   'offsets': [ 0, 0, 0 ]
- *               },
- *
- *               {
- *                   'ct': 2960,
- *                   'ccm': [ 2.26962, -0.54174, -0.72789,
- *                           -0.77008,  2.60271, -0.83262,
- *                           -0.26036, -1.51254,  2.77289 ],
- *                   'offsets': [ 0, 0, 0 ]
- *               },
- *
- *               {
- *                   'ct': 3603,
- *                   'ccm': [ 2.18644, -0.66148, -0.52496,
- *                           -0.77828,  2.69474, -0.91645,
- *                           -0.25239, -0.83059,  2.08298 ],
- *                   'offsets': [ 0, 0, 0 ]
- *               },
- *       ]
- *
- * In this case, \a key_name would be 'ct', and \a matrix_name can be either
- * 'ccm' or 'offsets'. This way multiple matrix interpolators can be defined in
- * one set of color temperature ranges in the tuning file, and they can be
- * retrieved separately with the \a matrix_name parameter.
- *
- * \return Zero on success, negative error code otherwise
- */
-
-/**
- * \fn Matrix<T, R, C> MatrixInterpolator<T, R, C>::get(unsigned int key)
- * \brief Retrieve a matrix from the list of matrices, interpolating if necessary
- * \param[in] key The unsigned integer key of the matrix to retrieve
- * \return The matrix corresponding to the color temperature
- */
-
-} /* namespace ipa */
-
-} /* namespace libcamera */
diff --git a/src/ipa/libipa/matrix_interpolator.h b/src/ipa/libipa/matrix_interpolator.h
deleted file mode 100644
index afbce538..00000000
--- a/src/ipa/libipa/matrix_interpolator.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-/*
- * Copyright (C) 2024, Paul Elder <paul.elder@ideasonboard.com>
- *
- * Helper class for interpolating maps of matrices
- */
-
-#pragma once
-
-#include <map>
-#include <string>
-
-#include <libcamera/base/log.h>
-
-#include "libcamera/internal/yaml_parser.h"
-
-#include "matrix.h"
-
-namespace libcamera {
-
-LOG_DECLARE_CATEGORY(MatrixInterpolator)
-
-namespace ipa {
-
-#ifndef __DOXYGEN__
-template<typename T, unsigned int R, unsigned int C,
-	 std::enable_if_t<std::is_arithmetic_v<T>> * = nullptr>
-#else
-template<typename T, unsigned int R, unsigned int C>
-#endif /* __DOXYGEN__ */
-class MatrixInterpolator
-{
-public:
-	MatrixInterpolator()
-	{
-		reset();
-	}
-
-	MatrixInterpolator(const std::map<unsigned int, Matrix<T, R, C>> &matrices)
-	{
-		for (const auto &pair : matrices)
-			matrices_[pair.first] = pair.second;
-	}
-
-	~MatrixInterpolator() {}
-
-	void reset()
-	{
-		matrices_.clear();
-		matrices_[0] = Matrix<T, R, C>::identity();
-	}
-
-	int readYaml(const libcamera::YamlObject &yaml,
-		     const std::string &key_name,
-		     const std::string &matrix_name)
-	{
-		matrices_.clear();
-
-		if (!yaml.isList()) {
-			LOG(MatrixInterpolator, Error) << "yaml object must be a list";
-			return -EINVAL;
-		}
-
-		for (const auto &value : yaml.asList()) {
-			unsigned int ct = std::stoul(value[key_name].get<std::string>(""));
-			std::optional<Matrix<T, R, C>> matrix =
-				value[matrix_name].get<Matrix<T, R, C>>();
-			if (!matrix) {
-				LOG(MatrixInterpolator, Error) << "Failed to read matrix";
-				return -EINVAL;
-			}
-
-			matrices_[ct] = *matrix;
-
-			LOG(MatrixInterpolator, Debug)
-				<< "Read matrix '" << matrix_name << "' for key '"
-				<< key_name << "' " << ct << ": "
-				<< matrices_[ct].toString();
-		}
-
-		if (matrices_.size() < 1) {
-			LOG(MatrixInterpolator, Error) << "Need at least one matrix";
-			return -EINVAL;
-		}
-
-		return 0;
-	}
-
-	Matrix<T, R, C> get(unsigned int ct)
-	{
-		ASSERT(matrices_.size() > 0);
-
-		if (matrices_.size() == 1 ||
-		    ct <= matrices_.begin()->first)
-			return matrices_.begin()->second;
-
-		if (ct >= matrices_.rbegin()->first)
-			return matrices_.rbegin()->second;
-
-		if (matrices_.find(ct) != matrices_.end())
-			return matrices_[ct];
-
-		/* The above four guarantee that this will succeed */
-		auto iter = matrices_.upper_bound(ct);
-		unsigned int ctUpper = iter->first;
-		unsigned int ctLower = (--iter)->first;
-
-		double lambda = (ct - ctLower) / static_cast<double>(ctUpper - ctLower);
-		Matrix<T, R, C> ret =
-			lambda * matrices_[ctUpper] + (1.0 - lambda) * matrices_[ctLower];
-		return ret;
-	}
-
-private:
-	std::map<unsigned int, Matrix<T, R, C>> matrices_;
-};
-
-} /* namespace ipa */
-
-} /* namespace libcamera */
diff --git a/src/ipa/libipa/meson.build b/src/ipa/libipa/meson.build
index 2c2712a7..3740178b 100644
--- a/src/ipa/libipa/meson.build
+++ b/src/ipa/libipa/meson.build
@@ -9,7 +9,6 @@ libipa_headers = files([
     'histogram.h',
     'interpolator.h',
     'matrix.h',
-    'matrix_interpolator.h',
     'module.h',
     'pwl.h',
     'vector.h',
@@ -24,7 +23,6 @@ libipa_sources = files([
     'histogram.cpp',
     'interpolator.cpp',
     'matrix.cpp',
-    'matrix_interpolator.cpp',
     'module.cpp',
     'pwl.cpp',
     'vector.cpp',