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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2019, Raspberry Pi Ltd
*
* histogram.h - histogram calculation interface
*/
#pragma once
#include <assert.h>
#include <limits.h>
#include <stdint.h>
#include <vector>
#include <libcamera/base/span.h>
namespace libcamera {
namespace ipa {
class Histogram
{
public:
Histogram() { cumulative_.push_back(0); }
Histogram(Span<const uint32_t> data);
size_t bins() const { return cumulative_.size() - 1; }
uint64_t total() const { return cumulative_[cumulative_.size() - 1]; }
uint64_t cumulativeFrequency(double bin) const;
double quantile(double q, uint32_t first = 0, uint32_t last = UINT_MAX) const;
double interQuantileMean(double lowQuantile, double hiQuantile) const;
private:
std::vector<uint64_t> cumulative_;
};
} /* namespace ipa */
} /* namespace libcamera */
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