cpp/core/src/zxing/oned/UPCEANReader.h

   1 #ifndef __UPC_EAN_READER_H__
   2 #define __UPC_EAN_READER_H__
   3
   4 /*
   5  *  UPCEANReader.h
   6  *  ZXing
   7  *
   8  *  Copyright 2010 ZXing authors All rights reserved.
   9  *
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *      http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  */
  22
  23 #pragma once
  24
  25 #include <zxing/oned/OneDReader.h>
  26 #include <zxing/common/BitArray.h>
  27 #include <zxing/Result.h>
  28 typedef enum UPC_EAN_PATTERNS {
  29         UPC_EAN_PATTERNS_L_PATTERNS = 0,
  30         UPC_EAN_PATTERNS_L_AND_G_PATTERNS
  31 } UPC_EAN_PATTERNS;
  32 namespace zxing {
  33         namespace oned {
  34                 class UPCEANReader : public OneDReader {
  35
  36                 private:
  37                         static const unsigned int MAX_AVG_VARIANCE = (unsigned int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.42f);
  38                         static const int MAX_INDIVIDUAL_VARIANCE = (int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.7f);
  39
  40                         static int* findStartGuardPattern(Ref<BitArray> row);                                                                                                                                   //throws ReaderException
  41
  42                         virtual int* decodeEnd(Ref<BitArray> row, int endStart);                                                                                                                                                //throws ReaderException
  43
  44                         static bool checkStandardUPCEANChecksum(std::string s);                                                                                                                                 //throws ReaderException
  45                 protected:
  46                         static int* findGuardPattern(Ref<BitArray> row, int rowOffset, bool whiteFirst, const int pattern[], int patternLen);   //throws ReaderException
  47
  48                         virtual const int getMIDDLE_PATTERN_LEN();
  49                         virtual const int* getMIDDLE_PATTERN();
  50
  51                 public:
  52                         UPCEANReader();
  53
  54                         virtual int decodeMiddle(Ref<BitArray> row, int startRange[], int startRangeLen, std::string& resultString) = 0;                        //throws ReaderException
  55
  56                         Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);
  57                         Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row, int startGuardRange[]);
  58
  59                         static int decodeDigit(Ref<BitArray> row, int counters[], int countersLen, int rowOffset, UPC_EAN_PATTERNS patternType);        //throws ReaderException
  60
  61                         virtual bool checkChecksum(std::string s);                                                                                                                                                                              //throws ReaderException
  62
  63                         virtual BarcodeFormat getBarcodeFormat() = 0;
  64                         virtual ~UPCEANReader();
  65                 };
  66         }
  67 }
  68
  69 #endif