From afd2a5dac59a06c6897bdf7a3a1f35743192b608 Mon Sep 17 00:00:00 2001 From: Naushir Patuck Date: Wed, 27 Jul 2022 09:55:20 +0100 Subject: ipa: raspberrypi: Rename header files from *.hpp to *.h As per the libcamera coding guidelines, rename all .hpp header files to .h. Signed-off-by: Naushir Patuck Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- src/ipa/raspberrypi/controller/histogram.h | 48 ++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/ipa/raspberrypi/controller/histogram.h (limited to 'src/ipa/raspberrypi/controller/histogram.h') diff --git a/src/ipa/raspberrypi/controller/histogram.h b/src/ipa/raspberrypi/controller/histogram.h new file mode 100644 index 00000000..33ba76c1 --- /dev/null +++ b/src/ipa/raspberrypi/controller/histogram.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi (Trading) Limited + * + * histogram.h - histogram calculation interface + */ +#pragma once + +#include +#include +#include + +/* + * A simple histogram class, for use in particular to find "quantiles" and + * averages between "quantiles". + */ + +namespace RPiController { + +class Histogram +{ +public: + template Histogram(T *histogram, int num) + { + assert(num); + cumulative_.reserve(num + 1); + cumulative_.push_back(0); + for (int i = 0; i < num; i++) + cumulative_.push_back(cumulative_.back() + + histogram[i]); + } + uint32_t bins() const { return cumulative_.size() - 1; } + uint64_t total() const { return cumulative_[cumulative_.size() - 1]; } + /* Cumulative frequency up to a (fractional) point in a bin. */ + uint64_t cumulativeFreq(double bin) const; + /* + * Return the (fractional) bin of the point q (0 <= q <= 1) through the + * histogram. Optionally provide limits to help. + */ + double quantile(double q, int first = -1, int last = -1) const; + /* Return the average histogram bin value between the two quantiles. */ + double interQuantileMean(double qLo, double qHi) const; + +private: + std::vector cumulative_; +}; + +} /* namespace RPiController */ -- cgit v1.2.1