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

   1 #ifndef __ITF_READER_H__
   2 #define __ITF_READER_H__
   3
   4 /*
   5  *  ITFReader.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 #include <zxing/oned/OneDReader.h>
  24 #include <zxing/common/BitArray.h>
  25 #include <zxing/Result.h>
  26
  27 namespace zxing {
  28         namespace oned {
  29                 class ITFReader : public OneDReader {
  30
  31                 private:
  32                         static const unsigned int MAX_AVG_VARIANCE = (unsigned int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.42f);
  33                         static const int MAX_INDIVIDUAL_VARIANCE = (int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.8f);
  34
  35                         // Stores the actual narrow line width of the image being decoded.
  36                         int narrowLineWidth;
  37
  38                         int* decodeStart(Ref<BitArray> row);                                                                                                                                            //throws ReaderException
  39                         int* decodeEnd(Ref<BitArray> row);                                                                                                                                                              //throws ReaderException
  40                         static void decodeMiddle(Ref<BitArray> row, int payloadStart, int payloadEnd, std::string& resultString);       //throws ReaderException
  41                         void validateQuietZone(Ref<BitArray> row, int startPattern);                                                                                            //throws ReaderException
  42                         static int skipWhiteSpace(Ref<BitArray> row);                                                                                                                           //throws ReaderException
  43
  44                         static int* findGuardPattern(Ref<BitArray> row, int rowOffset, const int pattern[], int patternLen);            //throws ReaderException
  45                         static int decodeDigit(int counters[], int countersLen);                                                                                                        //throws ReaderException
  46
  47                         void append(char* s, char c);
  48                 public:
  49                         Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);                                                                        ///throws ReaderException
  50                         ITFReader();
  51                         ~ITFReader();
  52                 };
  53         }
  54 }
  55
  56 #endif