9d152e9c66
Add helper functions for converting between floating point and fixed point numbers. Also add tests for them. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
88 lines
1.9 KiB
C++
88 lines
1.9 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2024, Paul Elder <paul.elder@ideasonboard.com>
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*
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* Miscellaneous utility tests
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*/
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#include <cmath>
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#include <iostream>
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#include <map>
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#include <stdint.h>
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#include "../src/ipa/rkisp1/utils.h"
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#include "test.h"
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using namespace std;
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using namespace libcamera;
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using namespace ipa::rkisp1;
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class RkISP1UtilsTest : public Test
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{
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protected:
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template<unsigned int intPrec, unsigned fracPrec, typename T>
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int testSingleFixedPoint(double input, T expected)
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{
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T ret = utils::floatingToFixedPoint<intPrec, fracPrec, T>(input);
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if (ret != expected) {
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cerr << "Expected " << input << " to convert to "
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<< expected << ", got " << ret << std::endl;
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return TestFail;
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}
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/*
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* The precision check is fairly arbitrary but is based on what
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* the rkisp1 is capable of in the crosstalk module.
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*/
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double f = utils::fixedToFloatingPoint<intPrec, fracPrec, double>(ret);
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if (std::abs(f - input) > 0.005) {
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cerr << "Reverse conversion expected " << ret
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<< " to convert to " << input
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<< ", got " << f << std::endl;
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return TestFail;
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}
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return TestPass;
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}
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int testFixedPoint()
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{
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/*
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* The second 7.992 test is to test that unused bits don't
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* affect the result.
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*/
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std::map<double, uint16_t> testCases = {
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{ 7.992, 0x3FF },
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{ 7.992, 0xBFF },
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{ 0.2, 0x01A },
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{ -0.2, 0x7E6 },
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{ -0.8, 0x79A },
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{ -0.4, 0x7CD },
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{ -1.4, 0x74D },
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{ -8, 0x400 },
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{ 0, 0 },
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};
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int ret;
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for (const auto &testCase : testCases) {
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ret = testSingleFixedPoint<4, 7, uint16_t>(testCase.first,
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testCase.second);
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if (ret != TestPass)
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return ret;
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}
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return TestPass;
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}
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int run()
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{
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/* fixed point conversion test */
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if (testFixedPoint() != TestPass)
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return TestFail;
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return TestPass;
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}
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};
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TEST_REGISTER(RkISP1UtilsTest)
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