ReedSolomonDecoder.h

00001 #ifndef __REED_SOLOMON_DECODER_H__
00002 #define __REED_SOLOMON_DECODER_H__
00003 
00004 /*
00005  *  ReedSolomonDecoder.h
00006  *  zxing
00007  *
00008  *  Copyright 2010 ZXing authors All rights reserved.
00009  *
00010  * Licensed under the Apache License, Version 2.0 (the "License");
00011  * you may not use this file except in compliance with the License.
00012  * You may obtain a copy of the License at
00013  *
00014  *      http://www.apache.org/licenses/LICENSE-2.0
00015  *
00016  * Unless required by applicable law or agreed to in writing, software
00017  * distributed under the License is distributed on an "AS IS" BASIS,
00018  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00019  * See the License for the specific language governing permissions and
00020  * limitations under the License.
00021  */
00022 
00023 #include <memory>
00024 #include <vector>
00025 #include <zxing/common/Counted.h>
00026 #include <zxing/common/Array.h>
00027 #include <zxing/common/reedsolomon/GenericGFPoly.h>
00028 #include <zxing/common/reedsolomon/GenericGF.h>
00029 
00030 namespace zxing {
00031 class GenericGFPoly;
00032 class GenericGF;
00033 
00034 class ReedSolomonDecoder {
00035 private:
00036   Ref<GenericGF> field;
00037 public:
00038   ReedSolomonDecoder(Ref<GenericGF> fld);
00039   ~ReedSolomonDecoder();
00040   void decode(ArrayRef<int> received, int twoS);
00041   std::vector<Ref<GenericGFPoly> > runEuclideanAlgorithm(Ref<GenericGFPoly> a, Ref<GenericGFPoly> b, int R);
00042 
00043 private:
00044   ArrayRef<int> findErrorLocations(Ref<GenericGFPoly> errorLocator);
00045   ArrayRef<int> findErrorMagnitudes(Ref<GenericGFPoly> errorEvaluator, ArrayRef<int> errorLocations);
00046 };
00047 }
00048 
00049 #endif // __REED_SOLOMON_DECODER_H__