Naushir Patuck
177df04d2b
Refactor all the source files in src/ipa/raspberrypi/ to match the recommended formatting guidelines for the libcamera project. The vast majority of changes in this commit comprise of switching from snake_case to CamelCase, and starting class member functions with a lower case character. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2019, Raspberry Pi (Trading) Limited
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*
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* noise.cpp - Noise control algorithm
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*/
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#include <math.h>
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#include <libcamera/base/log.h>
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#include "../device_status.h"
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#include "../noise_status.h"
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#include "noise.hpp"
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using namespace RPiController;
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using namespace libcamera;
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LOG_DEFINE_CATEGORY(RPiNoise)
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#define NAME "rpi.noise"
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Noise::Noise(Controller *controller)
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: Algorithm(controller), modeFactor_(1.0)
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{
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}
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char const *Noise::name() const
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{
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return NAME;
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}
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void Noise::switchMode(CameraMode const &cameraMode,
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[[maybe_unused]] Metadata *metadata)
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{
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// For example, we would expect a 2x2 binned mode to have a "noise
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// factor" of sqrt(2x2) = 2. (can't be less than one, right?)
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modeFactor_ = std::max(1.0, cameraMode.noiseFactor);
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}
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void Noise::read(boost::property_tree::ptree const ¶ms)
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{
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referenceConstant_ = params.get<double>("reference_constant");
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referenceSlope_ = params.get<double>("reference_slope");
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}
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void Noise::prepare(Metadata *imageMetadata)
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{
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struct DeviceStatus deviceStatus;
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deviceStatus.analogueGain = 1.0; // keep compiler calm
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if (imageMetadata->get("device.status", deviceStatus) == 0) {
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// There is a slight question as to exactly how the noise
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// profile, specifically the constant part of it, scales. For
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// now we assume it all scales the same, and we'll revisit this
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// if it proves substantially wrong. NOTE: we may also want to
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// make some adjustments based on the camera mode (such as
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// binning), if we knew how to discover it...
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double factor = sqrt(deviceStatus.analogueGain) / modeFactor_;
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struct NoiseStatus status;
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status.noiseConstant = referenceConstant_ * factor;
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status.noiseSlope = referenceSlope_ * factor;
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imageMetadata->set("noise.status", status);
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LOG(RPiNoise, Debug)
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<< "constant " << status.noiseConstant
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<< " slope " << status.noiseSlope;
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} else
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LOG(RPiNoise, Warning) << " no metadata";
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}
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// Register algorithm with the system.
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static Algorithm *create(Controller *controller)
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{
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return new Noise(controller);
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}
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static RegisterAlgorithm reg(NAME, &create);
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