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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021-2022, Ideas On Board
*
* RkISP1 Denoise Pre-Filter control
*/
#include "dpf.h"
#include <algorithm>
#include <string>
#include <vector>
#include <libcamera/base/log.h>
#include <libcamera/control_ids.h>
#include "linux/rkisp1-config.h"
/**
* \file dpf.h
*/
namespace libcamera {
namespace ipa::rkisp1::algorithms {
/**
* \class Dpf
* \brief RkISP1 Denoise Pre-Filter control
*
* The denoise pre-filter algorithm is a bilateral filter which combines a
* range filter and a domain filter. The denoise pre-filter is applied before
* demosaicing.
*/
LOG_DEFINE_CATEGORY(RkISP1Dpf)
Dpf::Dpf()
: config_({}), strengthConfig_({})
{
}
/**
* \copydoc libcamera::ipa::Algorithm::init
*/
int Dpf::init([[maybe_unused]] IPAContext &context,
const YamlObject &tuningData)
{
std::vector<uint8_t> values;
/*
* The domain kernel is configured with a 9x9 kernel for the green
* pixels, and a 13x9 or 9x9 kernel for red and blue pixels.
*/
const YamlObject &dFObject = tuningData["DomainFilter"];
/*
* For the green component, we have the 9x9 kernel specified
* as 6 coefficients:
* Y
* ^
* 4 | 6 5 4 5 6
* 3 | 5 3 3 5
* 2 | 5 3 2 3 5
* 1 | 3 1 1 3
* 0 - 4 2 0 2 4
* -1 | 3 1 1 3
* -2 | 5 3 2 3 5
* -3 | 5 3 3 5
* -4 | 6 5 4 5 6
* +---------|--------> X
* -4....-1 0 1 2 3 4
*/
values = dFObject["g"].getList<uint8_t>().value_or(std::vector<uint8_t>{});
if (values.size() != RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS) {
LOG(RkISP1Dpf, Error)
<< "Invalid 'DomainFilter:g': expected "
<< RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS
<< " elements, got " << values.size();
return -EINVAL;
}
std::copy_n(values.begin(), values.size(),
std::begin(config_.g_flt.spatial_coeff));
config_.g_flt.gr_enable = true;
config_.g_flt.gb_enable = true;
/*
* For the red and blue components, we have the 13x9 kernel specified
* as 6 coefficients:
*
* Y
* ^
* 4 | 6 5 4 3 4 5 6
* |
* 2 | 5 4 2 1 2 4 5
* |
* 0 - 5 3 1 0 1 3 5
* |
* -2 | 5 4 2 1 2 4 5
* |
* -4 | 6 5 4 3 4 5 6
* +-------------|------------> X
* -6 -4 -2 0 2 4 6
*
* For a 9x9 kernel, columns -6 and 6 are dropped, so coefficient
* number 6 is not used.
*/
values = dFObject["rb"].getList<uint8_t>().value_or(std::vector<uint8_t>{});
if (values.size() != RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS &&
values.size() != RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS - 1) {
LOG(RkISP1Dpf, Error)
<< "Invalid 'DomainFilter:rb': expected "
<< RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS - 1
<< " or " << RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS
<< " elements, got " << values.size();
return -EINVAL;
}
config_.rb_flt.fltsize = values.size() == RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS
? RKISP1_CIF_ISP_DPF_RB_FILTERSIZE_13x9
: RKISP1_CIF_ISP_DPF_RB_FILTERSIZE_9x9;
std::copy_n(values.begin(), values.size(),
std::begin(config_.rb_flt.spatial_coeff));
config_.rb_flt.r_enable = true;
config_.rb_flt.b_enable = true;
/*
* The range kernel is configured with a noise level lookup table (NLL)
* which stores a piecewise linear function that characterizes the
* sensor noise profile as a noise level function curve (NLF).
*/
const YamlObject &rFObject = tuningData["NoiseLevelFunction"];
std::vector<uint16_t> nllValues;
nllValues = rFObject["coeff"].getList<uint16_t>().value_or(std::vector<uint16_t>{});
if (nllValues.size() != RKISP1_CIF_ISP_DPF_MAX_NLF_COEFFS) {
LOG(RkISP1Dpf, Error)
<< "Invalid 'RangeFilter:coeff': expected "
<< RKISP1_CIF_ISP_DPF_MAX_NLF_COEFFS
<< " elements, got " << nllValues.size();
return -EINVAL;
}
std::copy_n(nllValues.begin(), nllValues.size(),
std::begin(config_.nll.coeff));
std::string scaleMode = rFObject["scale-mode"].get<std::string>("");
if (scaleMode == "linear") {
config_.nll.scale_mode = RKISP1_CIF_ISP_NLL_SCALE_LINEAR;
} else if (scaleMode == "logarithmic") {
config_.nll.scale_mode = RKISP1_CIF_ISP_NLL_SCALE_LOGARITHMIC;
} else {
LOG(RkISP1Dpf, Error)
<< "Invalid 'RangeFilter:scale-mode': expected "
<< "'linear' or 'logarithmic' value, got "
<< scaleMode;
return -EINVAL;
}
const YamlObject &fSObject = tuningData["FilterStrength"];
strengthConfig_.r = fSObject["r"].get<uint16_t>(64);
strengthConfig_.g = fSObject["g"].get<uint16_t>(64);
strengthConfig_.b = fSObject["b"].get<uint16_t>(64);
return 0;
}
/**
* \copydoc libcamera::ipa::Algorithm::queueRequest
*/
void Dpf::queueRequest(IPAContext &context,
[[maybe_unused]] const uint32_t frame,
IPAFrameContext &frameContext,
const ControlList &controls)
{
auto &dpf = context.activeState.dpf;
bool update = false;
const auto &denoise = controls.get(controls::draft::NoiseReductionMode);
if (denoise) {
LOG(RkISP1Dpf, Debug) << "Set denoise to " << *denoise;
switch (*denoise) {
case controls::draft::NoiseReductionModeOff:
if (dpf.denoise) {
dpf.denoise = false;
update = true;
}
break;
case controls::draft::NoiseReductionModeMinimal:
case controls::draft::NoiseReductionModeHighQuality:
case controls::draft::NoiseReductionModeFast:
if (!dpf.denoise) {
dpf.denoise = true;
update = true;
}
break;
default:
LOG(RkISP1Dpf, Error)
<< "Unsupported denoise value "
<< *denoise;
break;
}
}
frameContext.dpf.denoise = dpf.denoise;
frameContext.dpf.update = update;
}
/**
* \copydoc libcamera::ipa::Algorithm::prepare
*/
void Dpf::prepare(IPAContext &context, const uint32_t frame,
IPAFrameContext &frameContext, RkISP1Params *params)
{
if (!frameContext.dpf.update && frame > 0)
return;
auto config = params->block<BlockType::Dpf>();
config.setEnabled(frameContext.dpf.denoise);
if (frameContext.dpf.denoise) {
*config = config_;
const auto &awb = context.configuration.awb;
const auto &lsc = context.configuration.lsc;
auto &mode = config->gain.mode;
/*
* The DPF needs to take into account the total amount of
* digital gain, which comes from the AWB and LSC modules. The
* DPF hardware can be programmed with a digital gain value
* manually, but can also use the gains supplied by the AWB and
* LSC modules automatically when they are enabled. Use that
* mode of operation as it simplifies control of the DPF.
*/
if (awb.enabled && lsc.enabled)
mode = RKISP1_CIF_ISP_DPF_GAIN_USAGE_AWB_LSC_GAINS;
else if (awb.enabled)
mode = RKISP1_CIF_ISP_DPF_GAIN_USAGE_AWB_GAINS;
else if (lsc.enabled)
mode = RKISP1_CIF_ISP_DPF_GAIN_USAGE_LSC_GAINS;
else
mode = RKISP1_CIF_ISP_DPF_GAIN_USAGE_DISABLED;
}
if (frame == 0) {
auto strengthConfig = params->block<BlockType::DpfStrength>();
strengthConfig.setEnabled(true);
*strengthConfig = strengthConfig_;
}
}
REGISTER_IPA_ALGORITHM(Dpf, "Dpf")
} /* namespace ipa::rkisp1::algorithms */
} /* namespace libcamera */
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