Merge pull request #23666 from mshabunin:barcode-move

Moved barcode from opencv_contrib #23666

Merge with https://github.com/opencv/opencv_contrib/pull/3497

##### TODO
- [x] Documentation (bib)
- [x] Tutorial (references)
- [x] Sample app (refactored)
- [x] Java (test passes)
- [x] Python (test passes)
- [x] Build without DNN

modules/objdetect/src/barcode_decoder/ean8_decoder.hpp

@@ -0,0 +1,32 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+// Copyright (c) 2020-2021 darkliang wangberlinT Certseeds
+
+#ifndef OPENCV_BARCODE_EAN8_DECODER_HPP
+#define OPENCV_BARCODE_EAN8_DECODER_HPP
+
+#include "upcean_decoder.hpp"
+
+namespace cv {
+namespace barcode {
+
+using std::string;
+using std::vector;
+using std::pair;
+
+class Ean8Decoder : public UPCEANDecoder
+{
+
+public:
+    Ean8Decoder();
+
+    ~Ean8Decoder() override = default;
+
+protected:
+    Result decode(const vector<uchar> &data) const override;
+};
+}
+}
+
+#endif // OPENCV_BARCODE_EAN8_DECODER_HPP