added experimental RAW Bayer preprocessing filter for mititgating the Sony PDAF lines banding problem

rtengine/pdaflinesfilter.h

@@ -0,0 +1,41 @@
+/* -*- C++ -*-
+ *
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2017 Alberto Griggio <alberto.griggio@gmail.com>
+ *
+ *  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 <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "rawimagesource.h"
+#include <vector>
+
+namespace rtengine {
+
+class PDAFLinesFilter {
+public:
+    PDAFLinesFilter(RawImage *ri);
+    int mark(array2D<float> &rawData, PixelsMap &bpMap);
+
+private:
+    RawImage *ri_;
+    int W_;
+    int H_;
+    std::vector<int> pattern_;
+    int offset_;
+};
+
+} // namespace rtengine