From 726e9274ea95fa46352556d340c5793a8da51fcd Mon Sep 17 00:00:00 2001 From: Naushir Patuck Date: Wed, 3 May 2023 13:20:27 +0100 Subject: pipeline: ipa: raspberrypi: Refactor and move the Raspberry Pi code Split the Raspberry Pi pipeline handler and IPA source code into common and VC4/BCM2835 specific file structures. For the pipeline handler, the common code files now live in src/libcamera/pipeline/rpi/common/ and the VC4-specific files in src/libcamera/pipeline/rpi/vc4/. For the IPA, the common code files now live in src/ipa/rpi/{cam_helper,controller}/ and the vc4 specific files in src/ipa/rpi/vc4/. With this change, the camera tuning files are now installed under share/libcamera/ipa/rpi/vc4/. To build the pipeline and IPA, the meson configuration options have now changed from "raspberrypi" to "rpi/vc4": meson setup build -Dipas=rpi/vc4 -Dpipelines=rpi/vc4 Signed-off-by: Naushir Patuck Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- src/ipa/rpi/controller/histogram.h | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/ipa/rpi/controller/histogram.h (limited to 'src/ipa/rpi/controller/histogram.h') diff --git a/src/ipa/rpi/controller/histogram.h b/src/ipa/rpi/controller/histogram.h new file mode 100644 index 00000000..6b3e3a9e --- /dev/null +++ b/src/ipa/rpi/controller/histogram.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * 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: + Histogram() + { + cumulative_.push_back(0); + } + + 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