@@ -16,6 +16,7 @@
#include "libcamera/internal/yaml_parser.h"
+#include "libipa/polynomial.h"
#include "linux/rkisp1-config.h"
/**
@@ -68,6 +69,123 @@ namespace ipa::rkisp1::algorithms {
LOG_DEFINE_CATEGORY(RkISP1Lsc)
+class LscPolynomialLoader
+{
+public:
+ LscPolynomialLoader(const Size &sensorSize,
+ const Rectangle &cropRectangle,
+ const std::vector<double> &xSizes,
+ const std::vector<double> &ySizes)
+ : sensorSize_(sensorSize),
+ cropRectangle_(cropRectangle),
+ xSizes_(xSizes),
+ ySizes_(ySizes)
+ {
+ }
+
+ int parseLscData(const YamlObject &yamlSets,
+ std::map<unsigned int, LensShadingCorrection::Components> &lscData)
+ {
+ const auto &sets = yamlSets.asList();
+ for (const auto &yamlSet : sets) {
+ std::optional<Polynomial> pr, pgr, pgb, pb;
+ uint32_t ct = yamlSet["ct"].get<uint32_t>(0);
+
+ if (lscData.count(ct)) {
+ LOG(RkISP1Lsc, Error)
+ << "Multiple sets found for "
+ << "color temperature " << ct;
+ return -EINVAL;
+ }
+
+ LensShadingCorrection::Components &set = lscData[ct];
+ pr = yamlSet["r"].get<Polynomial>();
+ pgr = yamlSet["gr"].get<Polynomial>();
+ pgb = yamlSet["gb"].get<Polynomial>();
+ pb = yamlSet["b"].get<Polynomial>();
+
+ if (!(pr || pgr || pgb || pb)) {
+ LOG(RkISP1Lsc, Error)
+ << "Failed to parse polynomial for "
+ << "colour temperature " << ct;
+ return -EINVAL;
+ }
+
+ set.ct = ct;
+ pr->setReferenceImageSize(sensorSize_);
+ pgr->setReferenceImageSize(sensorSize_);
+ pgb->setReferenceImageSize(sensorSize_);
+ pb->setReferenceImageSize(sensorSize_);
+ set.r = samplePolynomial(*pr);
+ set.gr = samplePolynomial(*pgr);
+ set.gb = samplePolynomial(*pgb);
+ set.b = samplePolynomial(*pb);
+ }
+
+ if (lscData.empty()) {
+ LOG(RkISP1Lsc, Error) << "Failed to load any sets";
+ return -EINVAL;
+ }
+
+ return 0;
+ }
+
+private:
+ std::vector<double> sizesListToPositions(const std::vector<double> &sizes)
+ {
+ const int half = sizes.size();
+ std::vector<double> res(half * 2 + 1);
+ double x = 0.0;
+
+ res[half] = 0.5;
+ for (int i = 1; i <= half; i++) {
+ x += sizes[half - i];
+ res[half - i] = 0.5 - x;
+ res[half + i] = 0.5 + x;
+ }
+
+ return res;
+ }
+
+ std::vector<uint16_t> samplePolynomial(const Polynomial &poly)
+ {
+ constexpr int k = RKISP1_CIF_ISP_LSC_SAMPLES_MAX;
+
+ double m = poly.getM();
+ double x0 = cropRectangle_.x / m;
+ double y0 = cropRectangle_.y / m;
+ double w = cropRectangle_.width / m;
+ double h = cropRectangle_.height / m;
+ std::vector<uint16_t> res;
+
+ assert(xSizes_.size() * 2 + 1 == k);
+
+ res.reserve(k * k);
+
+ std::vector<double> xPos(sizesListToPositions(xSizes_));
+ std::vector<double> yPos(sizesListToPositions(ySizes_));
+
+ for (int x = 0; x < k; x++) {
+ for (int y = 0; y < k; y++) {
+ double xp = x0 + xPos[x] * w;
+ double yp = y0 + yPos[y] * h;
+ int v = static_cast<int>(
+ poly.sampleAtNormalizedPixelPos(xp, yp) *
+ 1024);
+
+ v = std::min(std::max(v, 1024), 4095);
+ res.push_back(v);
+ }
+ }
+ return res;
+ }
+
+ Size sensorSize_;
+ Rectangle cropRectangle_;
+ const std::vector<double> &xSizes_;
+ const std::vector<double> &ySizes_;
+};
+
class LscClassicLoader
{
public:
@@ -192,11 +310,17 @@ int LensShadingCorrection::init([[maybe_unused]] IPAContext &context,
std::map<unsigned int, Components> lscData;
int res = 0;
std::optional<std::string> type = tuningData["type"].get<std::string>();
- if (!type.has_value()) {
+ if (!tuningData.contains("type")) {
LOG(RkISP1Lsc, Warning) << "LSC data is in classic format. "
<< "This will be deprecated soon.";
auto loader = LscClassicLoader();
res = loader.parseLscData(yamlSets, lscData);
+ } else if (*type == "polynomial") {
+ auto loader = LscPolynomialLoader(context.sensorInfo.activeAreaSize,
+ context.sensorInfo.analogCrop,
+ xSize_,
+ ySize_);
+ res = loader.parseLscData(yamlSets, lscData);
} else {
LOG(RkISP1Lsc, Error) << "Unsupported LSC type '" << *type << "'";
res = -EINVAL;
Add a loader that is capable to load polynomial coefficients from the tuning files. The polynoms are sampled at load time to reduce the computational overhead at runtime. Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com> --- src/ipa/rkisp1/algorithms/lsc.cpp | 126 +++++++++++++++++++++++++++++- 1 file changed, 125 insertions(+), 1 deletion(-)