mirror of https://github.com/status-im/qzxing.git
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
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#ifndef __UPC_EAN_READER_H__
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#define __UPC_EAN_READER_H__
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/*
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zxing/oned/OneDReader.h>
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#include <zxing/common/BitArray.h>
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#include <zxing/Result.h>
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typedef enum UPC_EAN_PATTERNS {
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UPC_EAN_PATTERNS_L_PATTERNS = 0,
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UPC_EAN_PATTERNS_L_AND_G_PATTERNS
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} UPC_EAN_PATTERNS;
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namespace zxing {
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namespace oned {
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class UPCEANReader : public OneDReader {
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private:
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enum {MAX_AVG_VARIANCE = (unsigned int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 420/1000)};
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enum {MAX_INDIVIDUAL_VARIANCE = (int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 700/1000)};
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static bool findStartGuardPattern(Ref<BitArray> row, int* rangeStart, int* rangeEnd);
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virtual bool decodeEnd(Ref<BitArray> row, int endStart, int* endGuardBegin, int* endGuardEnd);
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static bool checkStandardUPCEANChecksum(std::string s);
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protected:
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static bool findGuardPattern(Ref<BitArray> row, int rowOffset, bool whiteFirst,
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const int pattern[], int patternLen, int* start, int* end);
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virtual int getMIDDLE_PATTERN_LEN();
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virtual const int* getMIDDLE_PATTERN();
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public:
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UPCEANReader();
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// Returns < 0 on failure, >= 0 on success.
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virtual int decodeMiddle(Ref<BitArray> row, int startGuardBegin, int startGuardEnd,
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std::string& resultString) = 0;
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Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);
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// TODO(dswitkin): Should this be virtual so that UPCAReader can override it?
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Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row, int startGuardBegin,
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int startGuardEnd);
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// Returns < 0 on failure, >= 0 on success.
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static int decodeDigit(Ref<BitArray> row, int counters[], int countersLen, int rowOffset,
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UPC_EAN_PATTERNS patternType);
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virtual bool checkChecksum(std::string s);
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virtual BarcodeFormat getBarcodeFormat() = 0;
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virtual ~UPCEANReader();
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};
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}
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}
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#endif
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