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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2019-2021, Raspberry Pi (Trading) Limited
*
* sdn.cpp - SDN (spatial denoise) control algorithm
*/
#include "libcamera/internal/log.h"
#include "../denoise_status.h"
#include "../noise_status.h"
#include "sdn.hpp"
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;
}
void Sdn::Read(boost::property_tree::ptree const ¶ms)
{
deviation_ = params.get<double>("deviation", 3.2);
strength_ = params.get<double>("strength", 0.75);
}
void Sdn::Initialise() {}
void Sdn::Prepare(Metadata *image_metadata)
{
struct NoiseStatus noise_status = {};
noise_status.noise_slope = 3.0; // in case no metadata
if (image_metadata->Get("noise.status", noise_status) != 0)
LOG(RPiSdn, Warning) << "no noise profile found";
LOG(RPiSdn, Debug)
<< "Noise profile: constant " << noise_status.noise_constant
<< " slope " << noise_status.noise_slope;
struct DenoiseStatus status;
status.noise_constant = noise_status.noise_constant * deviation_;
status.noise_slope = noise_status.noise_slope * deviation_;
status.strength = strength_;
status.mode = static_cast<std::underlying_type_t<DenoiseMode>>(mode_);
image_metadata->Set("denoise.status", status);
LOG(RPiSdn, Debug)
<< "programmed constant " << status.noise_constant
<< " slope " << status.noise_slope
<< " 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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