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-rw-r--r--src/ipa/rkisp1/algorithms/lsc.cpp166
-rw-r--r--src/ipa/rkisp1/algorithms/lsc.h13
2 files changed, 57 insertions, 122 deletions
diff --git a/src/ipa/rkisp1/algorithms/lsc.cpp b/src/ipa/rkisp1/algorithms/lsc.cpp
index 5f3a0388..fe84062b 100644
--- a/src/ipa/rkisp1/algorithms/lsc.cpp
+++ b/src/ipa/rkisp1/algorithms/lsc.cpp
@@ -24,6 +24,36 @@
namespace libcamera {
+namespace ipa {
+
+constexpr int kColourTemperatureChangeThreshhold = 10;
+
+template<typename T>
+void interpolateVector(const std::vector<T> &a, const std::vector<T> &b,
+ std::vector<T> &dest, double lambda)
+{
+ assert(a.size() == b.size());
+ dest.resize(a.size());
+ for (size_t i = 0; i < a.size(); i++) {
+ dest[i] = a[i] * (1.0 - lambda) + b[i] * lambda;
+ }
+}
+
+template<>
+void Interpolator<rkisp1::algorithms::LensShadingCorrection::Components>::
+ interpolate(const rkisp1::algorithms::LensShadingCorrection::Components &a,
+ const rkisp1::algorithms::LensShadingCorrection::Components &b,
+ rkisp1::algorithms::LensShadingCorrection::Components &dest,
+ double lambda)
+{
+ interpolateVector(a.r, b.r, dest.r, lambda);
+ interpolateVector(a.gr, b.gr, dest.gr, lambda);
+ interpolateVector(a.gb, b.gb, dest.gb, lambda);
+ interpolateVector(a.b, b.b, dest.b, lambda);
+}
+
+} /* namespace ipa */
+
namespace ipa::rkisp1::algorithms {
/**
@@ -90,8 +120,9 @@ static std::vector<uint16_t> parseTable(const YamlObject &tuningData,
}
LensShadingCorrection::LensShadingCorrection()
- : lastCt_({ 0, 0 })
+ : lastAppliedCt_(0), lastAppliedQuantizedCt_(0)
{
+ sets_.setQuantization(kColourTemperatureChangeThreshhold);
}
/**
@@ -115,17 +146,18 @@ int LensShadingCorrection::init([[maybe_unused]] IPAContext &context,
}
const auto &sets = yamlSets.asList();
+ std::map<unsigned int, Components> lscData;
for (const auto &yamlSet : sets) {
uint32_t ct = yamlSet["ct"].get<uint32_t>(0);
- if (sets_.count(ct)) {
+ if (lscData.count(ct)) {
LOG(RkISP1Lsc, Error)
<< "Multiple sets found for color temperature "
<< ct;
return -EINVAL;
}
- Components &set = sets_[ct];
+ Components &set = lscData[ct];
set.ct = ct;
set.r = parseTable(yamlSet, "r");
@@ -142,11 +174,13 @@ int LensShadingCorrection::init([[maybe_unused]] IPAContext &context,
}
}
- if (sets_.empty()) {
+ if (lscData.empty()) {
LOG(RkISP1Lsc, Error) << "Failed to load any sets";
return -EINVAL;
}
+ sets_.setData(std::move(lscData));
+
return 0;
}
@@ -202,134 +236,34 @@ void LensShadingCorrection::copyTable(rkisp1_cif_isp_lsc_config &config,
std::copy(set.b.begin(), set.b.end(), &config.b_data_tbl[0][0]);
}
-/*
- * Interpolate LSC parameters based on color temperature value.
- */
-void LensShadingCorrection::interpolateTable(rkisp1_cif_isp_lsc_config &config,
- const Components &set0,
- const Components &set1,
- const uint32_t ct)
-{
- double coeff0 = (set1.ct - ct) / static_cast<double>(set1.ct - set0.ct);
- double coeff1 = (ct - set0.ct) / static_cast<double>(set1.ct - set0.ct);
-
- for (unsigned int i = 0; i < RKISP1_CIF_ISP_LSC_SAMPLES_MAX; ++i) {
- for (unsigned int j = 0; j < RKISP1_CIF_ISP_LSC_SAMPLES_MAX; ++j) {
- unsigned int sample = i * RKISP1_CIF_ISP_LSC_SAMPLES_MAX + j;
-
- config.r_data_tbl[i][j] =
- set0.r[sample] * coeff0 +
- set1.r[sample] * coeff1;
-
- config.gr_data_tbl[i][j] =
- set0.gr[sample] * coeff0 +
- set1.gr[sample] * coeff1;
-
- config.gb_data_tbl[i][j] =
- set0.gb[sample] * coeff0 +
- set1.gb[sample] * coeff1;
-
- config.b_data_tbl[i][j] =
- set0.b[sample] * coeff0 +
- set1.b[sample] * coeff1;
- }
- }
-}
-
/**
* \copydoc libcamera::ipa::Algorithm::prepare
*/
void LensShadingCorrection::prepare(IPAContext &context,
- const uint32_t frame,
+ [[maybe_unused]] const uint32_t frame,
[[maybe_unused]] IPAFrameContext &frameContext,
RkISP1Params *params)
{
- /*
- * If there is only one set, the configuration has already been done
- * for first frame.
- */
- if (sets_.size() == 1 && frame > 0)
- return;
-
- /*
- * If there is only one set, pick it. We can ignore lastCt_, as it will
- * never be relevant.
- */
- if (sets_.size() == 1) {
- auto config = params->block<BlockType::Lsc>();
- config.setEnabled(true);
-
- setParameters(*config);
- copyTable(*config, sets_.cbegin()->second);
- return;
- }
-
uint32_t ct = context.activeState.awb.temperatureK;
- ct = std::clamp(ct, sets_.cbegin()->first, sets_.crbegin()->first);
-
- /*
- * If the original is the same, then it means the same adjustment would
- * be made. If the adjusted is the same, then it means that it's the
- * same as what was actually applied. Thus in these cases we can skip
- * reprogramming the LSC.
- *
- * original == adjusted can only happen if an interpolation
- * happened, or if original has an exact entry in sets_. This means
- * that if original != adjusted, then original was adjusted to
- * the nearest available entry in sets_, resulting in adjusted.
- * Clearly, any ct value that is in between original and adjusted
- * will be adjusted to the same adjusted value, so we can skip
- * reprogramming the LSC table.
- *
- * We also skip updating the original value, as the last one had a
- * larger bound and thus a larger range of ct values that will be
- * adjusted to the same adjusted.
- */
- if ((lastCt_.original <= ct && ct <= lastCt_.adjusted) ||
- (lastCt_.adjusted <= ct && ct <= lastCt_.original))
+ if (std::abs(static_cast<int>(ct) - static_cast<int>(lastAppliedCt_)) <
+ kColourTemperatureChangeThreshhold)
+ return;
+ unsigned int quantizedCt;
+ const Components &set = sets_.getInterpolated(ct, &quantizedCt);
+ if (lastAppliedQuantizedCt_ == quantizedCt)
return;
auto config = params->block<BlockType::Lsc>();
config.setEnabled(true);
setParameters(*config);
+ copyTable(*config, set);
- /*
- * The color temperature matches exactly one of the available LSC tables.
- */
- if (sets_.count(ct)) {
- copyTable(*config, sets_[ct]);
- lastCt_ = { ct, ct };
- return;
- }
+ lastAppliedCt_ = ct;
+ lastAppliedQuantizedCt_ = quantizedCt;
- /* No shortcuts left; we need to round or interpolate */
- auto iter = sets_.upper_bound(ct);
- const Components &set1 = iter->second;
- const Components &set0 = (--iter)->second;
- uint32_t ct0 = set0.ct;
- uint32_t ct1 = set1.ct;
- uint32_t diff0 = ct - ct0;
- uint32_t diff1 = ct1 - ct;
- static constexpr double kThreshold = 0.1;
- float threshold = kThreshold * (ct1 - ct0);
-
- if (diff0 < threshold || diff1 < threshold) {
- const Components &set = diff0 < diff1 ? set0 : set1;
- LOG(RkISP1Lsc, Debug) << "using LSC table for " << set.ct;
- copyTable(*config, set);
- lastCt_ = { ct, set.ct };
- return;
- }
-
- /*
- * ct is not within 10% of the difference between the neighbouring
- * color temperatures, so we need to interpolate.
- */
LOG(RkISP1Lsc, Debug)
- << "ct is " << ct << ", interpolating between "
- << ct0 << " and " << ct1;
- interpolateTable(*config, set0, set1, ct);
- lastCt_ = { ct, ct };
+ << "ct is " << ct << ", quantized to "
+ << quantizedCt;
}
REGISTER_IPA_ALGORITHM(LensShadingCorrection, "LensShadingCorrection")
diff --git a/src/ipa/rkisp1/algorithms/lsc.h b/src/ipa/rkisp1/algorithms/lsc.h
index a9c7a230..5a0824e3 100644
--- a/src/ipa/rkisp1/algorithms/lsc.h
+++ b/src/ipa/rkisp1/algorithms/lsc.h
@@ -9,6 +9,8 @@
#include <map>
+#include "libipa/interpolator.h"
+
#include "algorithm.h"
namespace libcamera {
@@ -27,7 +29,6 @@ public:
IPAFrameContext &frameContext,
RkISP1Params *params) override;
-private:
struct Components {
uint32_t ct;
std::vector<uint16_t> r;
@@ -36,23 +37,23 @@ private:
std::vector<uint16_t> b;
};
+private:
void setParameters(rkisp1_cif_isp_lsc_config &config);
void copyTable(rkisp1_cif_isp_lsc_config &config, const Components &set0);
void interpolateTable(rkisp1_cif_isp_lsc_config &config,
const Components &set0, const Components &set1,
const uint32_t ct);
- std::map<uint32_t, Components> sets_;
+ ipa::Interpolator<Components> sets_;
std::vector<double> xSize_;
std::vector<double> ySize_;
uint16_t xGrad_[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
uint16_t yGrad_[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
uint16_t xSizes_[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
uint16_t ySizes_[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
- struct {
- uint32_t original;
- uint32_t adjusted;
- } lastCt_;
+
+ unsigned int lastAppliedCt_;
+ unsigned int lastAppliedQuantizedCt_;
};
} /* namespace ipa::rkisp1::algorithms */
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 15:21:41 +0000