Add initial metadata lens correction handling

rtengine/lensmetadata.h

@@ -0,0 +1,47 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2024 Rawtherapee developers
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <memory>
+
+#include "lcp.h"
+#include "metadata.h"
+#include "procparams.h"
+#include "rtengine.h"
+
+namespace rtengine
+{
+
+/* MetadataLensCorrection is an abstract class for various lens correction based on raw file metadata
+ this metadata is vendor dependent */
+class MetadataLensCorrection : public LensCorrection,
+                               public NonCopyable
+{
+public:
+    virtual void initCorrections(int width, int height, const procparams::CoarseTransformParams &coarse, int rawRotationDeg) = 0;
+};
+
+/* MetadataLensCorrectionFinder tries to find and return MetadataLensCorrection for the provided metadata */
+class MetadataLensCorrectionFinder
+{
+public:
+    static std::unique_ptr<MetadataLensCorrection> findCorrection(const FramesMetaData *meta);
+};
+
+} // namespace rtengine