mirror of
https://git.libcamera.org/libcamera/libcamera.git
synced 2025-07-13 15:29:45 +03:00
acd5d9979f
As part of the on-going refactor efforts for the source files in src/ipa/raspberrypi/, switch all C++ style comments to C style comments. 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>
80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (C) 2019, Raspberry Pi (Trading) Limited
|
|
*
|
|
* noise.cpp - Noise control algorithm
|
|
*/
|
|
|
|
#include <math.h>
|
|
|
|
#include <libcamera/base/log.h>
|
|
|
|
#include "../device_status.h"
|
|
#include "../noise_status.h"
|
|
|
|
#include "noise.hpp"
|
|
|
|
using namespace RPiController;
|
|
using namespace libcamera;
|
|
|
|
LOG_DEFINE_CATEGORY(RPiNoise)
|
|
|
|
#define NAME "rpi.noise"
|
|
|
|
Noise::Noise(Controller *controller)
|
|
: Algorithm(controller), modeFactor_(1.0)
|
|
{
|
|
}
|
|
|
|
char const *Noise::name() const
|
|
{
|
|
return NAME;
|
|
}
|
|
|
|
void Noise::switchMode(CameraMode const &cameraMode,
|
|
[[maybe_unused]] Metadata *metadata)
|
|
{
|
|
/*
|
|
* For example, we would expect a 2x2 binned mode to have a "noise
|
|
* factor" of sqrt(2x2) = 2. (can't be less than one, right?)
|
|
*/
|
|
modeFactor_ = std::max(1.0, cameraMode.noiseFactor);
|
|
}
|
|
|
|
void Noise::read(boost::property_tree::ptree const ¶ms)
|
|
{
|
|
referenceConstant_ = params.get<double>("reference_constant");
|
|
referenceSlope_ = params.get<double>("reference_slope");
|
|
}
|
|
|
|
void Noise::prepare(Metadata *imageMetadata)
|
|
{
|
|
struct DeviceStatus deviceStatus;
|
|
deviceStatus.analogueGain = 1.0; /* keep compiler calm */
|
|
if (imageMetadata->get("device.status", deviceStatus) == 0) {
|
|
/*
|
|
* There is a slight question as to exactly how the noise
|
|
* profile, specifically the constant part of it, scales. For
|
|
* now we assume it all scales the same, and we'll revisit this
|
|
* if it proves substantially wrong. NOTE: we may also want to
|
|
* make some adjustments based on the camera mode (such as
|
|
* binning), if we knew how to discover it...
|
|
*/
|
|
double factor = sqrt(deviceStatus.analogueGain) / modeFactor_;
|
|
struct NoiseStatus status;
|
|
status.noiseConstant = referenceConstant_ * factor;
|
|
status.noiseSlope = referenceSlope_ * factor;
|
|
imageMetadata->set("noise.status", status);
|
|
LOG(RPiNoise, Debug)
|
|
<< "constant " << status.noiseConstant
|
|
<< " slope " << status.noiseSlope;
|
|
} else
|
|
LOG(RPiNoise, Warning) << " no metadata";
|
|
}
|
|
|
|
/* Register algorithm with the system. */
|
|
static Algorithm *create(Controller *controller)
|
|
{
|
|
return new Noise(controller);
|
|
}
|
|
static RegisterAlgorithm reg(NAME, &create);
|