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45 lines
1.5 KiB
45 lines
1.5 KiB
#ifndef _RAR_RS16_
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#define _RAR_RS16_
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class RSCoder16
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{
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private:
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static const uint gfSize=65535; // Galois field size.
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void gfInit(); // Galois field inititalization.
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inline uint gfAdd(uint a,uint b); // Addition in Galois field.
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inline uint gfMul(uint a,uint b); // Multiplication in Galois field.
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inline uint gfInv(uint a); // Inverse element in Galois field.
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uint *gfExp; // Galois field exponents.
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uint *gfLog; // Galois field logarithms.
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void MakeEncoderMatrix();
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void MakeDecoderMatrix();
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void InvertDecoderMatrix();
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#ifdef USE_SSE
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bool SSE_UpdateECC(uint DataNum, uint ECCNum, const byte *Data, byte *ECC, size_t BlockSize);
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#endif
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bool Decoding; // If we are decoding or encoding data.
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uint ND; // Number of data units.
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uint NR; // Number of Reed-Solomon code units.
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uint NE; // Number of erasures.
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bool *ValidFlags; // Validity flags for data and ECC units.
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uint *MX; // Cauchy based coding or decoding matrix.
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uint *DataLog; // Buffer to store data logarithms for UpdateECC.
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size_t DataLogSize;
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public:
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RSCoder16();
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~RSCoder16();
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bool Init(uint DataCount, uint RecCount, bool *ValidityFlags);
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#if 0 // We use only UpdateECC now.
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void Process(const uint *Data, uint *Out);
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#endif
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void UpdateECC(uint DataNum, uint ECCNum, const byte *Data, byte *ECC, size_t BlockSize);
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};
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#endif
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