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-rw-r--r--test/ipa/rkisp1/rkisp1-utils.cpp88
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diff --git a/test/ipa/rkisp1/rkisp1-utils.cpp b/test/ipa/rkisp1/rkisp1-utils.cpp
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2024, Paul Elder <paul.elder@ideasonboard.com>
+ *
+ * Miscellaneous utility tests
+ */
+
+#include <cmath>
+#include <iostream>
+#include <map>
+#include <stdint.h>
+
+#include "../src/ipa/rkisp1/utils.h"
+
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+using namespace ipa::rkisp1;
+
+class RkISP1UtilsTest : public Test
+{
+protected:
+ template<unsigned int intPrec, unsigned fracPrec, typename T>
+ int testSingleFixedPoint(double input, T expected)
+ {
+ T ret = utils::floatingToFixedPoint<intPrec, fracPrec, T>(input);
+ if (ret != expected) {
+ cerr << "Expected " << input << " to convert to "
+ << expected << ", got " << ret << std::endl;
+ return TestFail;
+ }
+
+ /*
+ * The precision check is fairly arbitrary but is based on what
+ * the rkisp1 is capable of in the crosstalk module.
+ */
+ double f = utils::fixedToFloatingPoint<intPrec, fracPrec, double>(ret);
+ if (std::abs(f - input) > 0.005) {
+ cerr << "Reverse conversion expected " << ret
+ << " to convert to " << input
+ << ", got " << f << std::endl;
+ return TestFail;
+ }
+
+ return TestPass;
+ }
+
+ int testFixedPoint()
+ {
+ /*
+ * The second 7.992 test is to test that unused bits don't
+ * affect the result.
+ */
+ std::map<double, uint16_t> testCases = {
+ { 7.992, 0x3FF },
+ { 7.992, 0xBFF },
+ { 0.2, 0x01A },
+ { -0.2, 0x7E6 },
+ { -0.8, 0x79A },
+ { -0.4, 0x7CD },
+ { -1.4, 0x74D },
+ { -8, 0x400 },
+ { 0, 0 },
+ };
+
+ int ret;
+ for (const auto &testCase : testCases) {
+ ret = testSingleFixedPoint<4, 7, uint16_t>(testCase.first,
+ testCase.second);
+ if (ret != TestPass)
+ return ret;
+ }
+
+ return TestPass;
+ }
+
+ int run()
+ {
+ /* fixed point conversion test */
+ if (testFixedPoint() != TestPass)
+ return TestFail;
+
+ return TestPass;
+ }
+};
+
+TEST_REGISTER(RkISP1UtilsTest)