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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2019-2021, Raspberry Pi Ltd
*
* sdn.cpp - SDN (spatial denoise) control algorithm
*/
#include <libcamera/base/log.h>
#include <libcamera/base/utils.h>
#include "../denoise_status.h"
#include "../noise_status.h"
#include "sdn.h"
using namespace RPiController;
using namespace libcamera;
LOG_DEFINE_CATEGORY(RPiSdn)
/*
* Calculate settings for the spatial denoise block using the noise profile in
* the image metadata.
*/
#define NAME "rpi.sdn"
Sdn::Sdn(Controller *controller)
: DenoiseAlgorithm(controller), mode_(DenoiseMode::ColourOff)
{
}
char const *Sdn::name() const
{
return NAME;
}
int Sdn::read(const libcamera::YamlObject ¶ms)
{
LOG(RPiSdn, Warning)
<< "Using legacy SDN tuning - please consider moving SDN inside rpi.denoise";
deviation_ = params["deviation"].get<double>(3.2);
strength_ = params["strength"].get<double>(0.75);
return 0;
}
void Sdn::initialise()
{
}
void Sdn::prepare(Metadata *imageMetadata)
{
struct NoiseStatus noiseStatus = {};
noiseStatus.noiseSlope = 3.0; /* in case no metadata */
if (imageMetadata->get("noise.status", noiseStatus) != 0)
LOG(RPiSdn, Warning) << "no noise profile found";
LOG(RPiSdn, Debug)
<< "Noise profile: constant " << noiseStatus.noiseConstant
<< " slope " << noiseStatus.noiseSlope;
struct DenoiseStatus status;
status.noiseConstant = noiseStatus.noiseConstant * deviation_;
status.noiseSlope = noiseStatus.noiseSlope * deviation_;
status.strength = strength_;
status.mode = utils::to_underlying(mode_);
imageMetadata->set("denoise.status", status);
LOG(RPiSdn, Debug)
<< "programmed constant " << status.noiseConstant
<< " slope " << status.noiseSlope
<< " strength " << status.strength;
}
void Sdn::setMode(DenoiseMode mode)
{
/* We only distinguish between off and all other modes. */
mode_ = mode;
}
/* Register algorithm with the system. */
static Algorithm *create(Controller *controller)
{
return (Algorithm *)new Sdn(controller);
}
static RegisterAlgorithm reg(NAME, &create);
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