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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2024, Ideas on Board Oy
*
* Histogram tests
*/
#include "../src/ipa/libipa/histogram.h"
#include <cmath>
#include <iostream>
#include <map>
#include <stdint.h>
#include "test.h"
using namespace std;
using namespace libcamera;
using namespace ipa;
#define ASSERT_EQ(a, b) \
if (!((a) == (b))) { \
std::cout << #a " != " #b << std::endl; \
return TestFail; \
}
class HistogramTest : public Test
{
protected:
int run()
{
auto hist = Histogram({ { 50, 50 } });
ASSERT_EQ(hist.bins(), 2);
ASSERT_EQ(hist.total(), 100);
ASSERT_EQ(hist.cumulativeFrequency(1.0), 50);
ASSERT_EQ(hist.cumulativeFrequency(1.5), 75);
ASSERT_EQ(hist.cumulativeFrequency(2.0), 100);
ASSERT_EQ(hist.quantile(0.0), 0.0);
ASSERT_EQ(hist.quantile(1.0), 2.0);
ASSERT_EQ(hist.quantile(0.5), 1.0);
/* Test quantile in the middle of a bin. */
ASSERT_EQ(hist.quantile(0.75), 1.5);
/* Test quantile smaller than the smallest histogram step. */
ASSERT_EQ(hist.quantile(0.001), 0.002);
ASSERT_EQ(hist.interQuantileMean(0.0, 1.0), 1.0);
ASSERT_EQ(hist.interQuantileMean(0.0, 0.5), 0.5);
ASSERT_EQ(hist.interQuantileMean(0.5, 1.0), 1.5);
/* Test interquantile mean that starts and ends in the middle of a bin. */
ASSERT_EQ(hist.interQuantileMean(0.25, 0.75), 1.0);
/* Test small ranges at the borders of the histogram. */
ASSERT_EQ(hist.interQuantileMean(0.0, 0.1), 0.1);
ASSERT_EQ(hist.interQuantileMean(0.9, 1.0), 1.9);
return TestPass;
}
};
TEST_REGISTER(HistogramTest)
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