symbian/QQrDecoder/zxing/oned/ITFReader.h

   1 /*
   2  *  ITFReader.h
   3  *  ZXing
   4  *
   5  *  Created by Lukasz Warchol on 10-01-26.
   6  *  Copyright 2010 ZXing authors All rights reserved.
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20
  21 #include <zxing/oned/OneDReader.h>
  22 #include <zxing/common/BitArray.h>
  23 #include <zxing/Result.h>
  24
  25 namespace zxing {
  26         namespace oned {
  27                 class ITFReader : public OneDReader {
  28
  29                 private:
  30                         static const int MAX_AVG_VARIANCE = (int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.42f);
  31                         static const int MAX_INDIVIDUAL_VARIANCE = (int) (PATTERN_MATCH_RESULT_SCALE_FACTOR * 0.8f);
  32
  33                         // Stores the actual narrow line width of the image being decoded.
  34                         int narrowLineWidth;
  35
  36                         int* decodeStart(Ref<BitArray> row);                                                                                                                                            //throws ReaderException
  37                         int* decodeEnd(Ref<BitArray> row);                                                                                                                                                              //throws ReaderException
  38                         static void decodeMiddle(Ref<BitArray> row, int payloadStart, int payloadEnd, std::string& resultString);       //throws ReaderException
  39                         void validateQuietZone(Ref<BitArray> row, int startPattern);                                                                                            //throws ReaderException
  40                         static int skipWhiteSpace(Ref<BitArray> row);                                                                                                                           //throws ReaderException
  41
  42                         static int* findGuardPattern(Ref<BitArray> row, int rowOffset, const int pattern[], int patternLen);            //throws ReaderException
  43                         static int decodeDigit(int counters[], int countersLen);                                                                                                        //throws ReaderException
  44
  45                         void append(char* s, char c);
  46                 public:
  47                         Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);                                                                        ///throws ReaderException
  48                         ITFReader();
  49                         ~ITFReader();
  50                 };
  51         }
  52 }
  53