xfa/src/fxbarcode/pdf417/BC_PDF417ScanningDecoder.h

// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef _BC_PDF417SCANNINGDECODER_H_
#define _BC_PDF417SCANNINGDECODER_H_
class CBC_CommonDecoderResult;
class CBC_CommonBitMatrix;
class CBC_ErrorCorrection;
class CBC_Codeword;
class CBC_BoundingBox;
class CBC_ResultPoint;
class CBC_BarcodeMetadata;
class CBC_BarcodeValue;
class CBC_DetectionResult;
class CBC_DetectionResultRowIndicatorColumn;

class CBC_PDF417ScanningDecoder
{
public:
    CBC_PDF417ScanningDecoder();
    virtual ~CBC_PDF417ScanningDecoder();
    static void Initialize();
    static void Finalize();
    static CBC_CommonDecoderResult* decode(CBC_CommonBitMatrix* image, CBC_ResultPoint* imageTopLeft, CBC_ResultPoint* imageBottomLeft, CBC_ResultPoint* imageTopRight,
                                           CBC_ResultPoint* imageBottomRight, int32_t minCodewordWidth, int32_t maxCodewordWidth, int32_t &e);
    static CFX_ByteString toString(CFX_PtrArray* barcodeMatrix);
private:
    static int32_t CODEWORD_SKEW_SIZE;
    static int32_t MAX_ERRORS;
    static int32_t MAX_EC_CODEWORDS;
    static CBC_PDF417ECErrorCorrection* errorCorrection;
    static CBC_DetectionResult* merge(CBC_DetectionResultRowIndicatorColumn* leftRowIndicatorColumn, CBC_DetectionResultRowIndicatorColumn* rightRowIndicatorColumn, int32_t &e);
    static CBC_BoundingBox* adjustBoundingBox(CBC_DetectionResultRowIndicatorColumn* rowIndicatorColumn, int32_t &e);
    static int32_t getMax(CFX_Int32Array& values);
    static CBC_BarcodeMetadata* getBarcodeMetadata(CBC_DetectionResultRowIndicatorColumn* leftRowIndicatorColumn, CBC_DetectionResultRowIndicatorColumn* rightRowIndicatorColumn);
    static CBC_DetectionResultRowIndicatorColumn* getRowIndicatorColumn(CBC_CommonBitMatrix* image, CBC_BoundingBox* boundingBox, CBC_ResultPoint startPoint,
            FX_BOOL leftToRight, int32_t minCodewordWidth, int32_t maxCodewordWidth);
    static void adjustCodewordCount(CBC_DetectionResult* detectionResult, CFX_PtrArray* barcodeMatrix, int32_t &e);
    static CBC_CommonDecoderResult* createDecoderResult(CBC_DetectionResult* detectionResult, int32_t &e);
    static CBC_CommonDecoderResult* createDecoderResultFromAmbiguousValues(int32_t ecLevel, CFX_Int32Array &codewords, CFX_Int32Array &erasureArray, CFX_Int32Array &ambiguousIndexes,
            CFX_PtrArray& ambiguousIndexValues, int32_t &e);
    static CFX_PtrArray* createBarcodeMatrix(CBC_DetectionResult* detectionResult);
    static FX_BOOL isValidBarcodeColumn(CBC_DetectionResult* detectionResult, int32_t barcodeColumn);
    static int32_t getStartColumn(CBC_DetectionResult* detectionResult, int32_t barcodeColumn, int32_t imageRow, FX_BOOL leftToRight);
    static CBC_Codeword* detectCodeword(CBC_CommonBitMatrix* image, int32_t minColumn, int32_t maxColumn, FX_BOOL leftToRight, int32_t startColumn,
                                        int32_t imageRow, int32_t minCodewordWidth, int32_t maxCodewordWidth);
    static CFX_Int32Array* getModuleBitCount(CBC_CommonBitMatrix* image, int32_t minColumn, int32_t maxColumn, FX_BOOL leftToRight, int32_t startColumn, int32_t imageRow);
    static int32_t getNumberOfECCodeWords(int32_t barcodeECLevel);
    static int32_t adjustCodewordStartColumn(CBC_CommonBitMatrix* image, int32_t minColumn, int32_t maxColumn, FX_BOOL leftToRight, int32_t codewordStartColumn, int32_t imageRow);
    static FX_BOOL checkCodewordSkew(int32_t codewordSize, int32_t minCodewordWidth, int32_t maxCodewordWidth);
    static CBC_CommonDecoderResult* decodeCodewords(CFX_Int32Array &codewords, int32_t ecLevel, CFX_Int32Array &erasures, int32_t &e);
    static int32_t correctErrors(CFX_Int32Array &codewords, CFX_Int32Array &erasures, int32_t numECCodewords, int32_t &e);
    static void verifyCodewordCount(CFX_Int32Array &codewords, int32_t numECCodewords, int32_t &e);
    static CFX_Int32Array* getBitCountForCodeword(int32_t codeword);
    static int32_t getCodewordBucketNumber(int32_t codeword);
    static int32_t getCodewordBucketNumber(CFX_Int32Array& moduleBitCount);
};
#endif