Initial community commit

Src/external_dependencies/openmpt-trunk/include/unrar/rs16.hpp

@@ -0,0 +1,44 @@
+#ifndef _RAR_RS16_
+#define _RAR_RS16_
+
+class RSCoder16
+{
+  private:
+    static const uint gfSize=65535;   // Galois field size.
+    void gfInit();                    // Galois field inititalization.
+    inline uint gfAdd(uint a,uint b); // Addition in Galois field. 
+    inline uint gfMul(uint a,uint b); // Multiplication in Galois field. 
+    inline uint gfInv(uint a);        // Inverse element in Galois field.
+    uint *gfExp;                      // Galois field exponents.
+    uint *gfLog;                      // Galois field logarithms.
+
+    void MakeEncoderMatrix();
+    void MakeDecoderMatrix();
+    void InvertDecoderMatrix();
+
+#ifdef USE_SSE
+    bool SSE_UpdateECC(uint DataNum, uint ECCNum, const byte *Data, byte *ECC, size_t BlockSize);
+#endif
+
+    bool Decoding;    // If we are decoding or encoding data.
+    uint ND;          // Number of data units.
+    uint NR;          // Number of Reed-Solomon code units.
+    uint NE;          // Number of erasures.
+    bool *ValidFlags; // Validity flags for data and ECC units.
+    uint *MX;         // Cauchy based coding or decoding matrix.
+
+    uint *DataLog; // Buffer to store data logarithms for UpdateECC.
+    size_t DataLogSize;
+
+  public:
+    RSCoder16();
+    ~RSCoder16();
+
+    bool Init(uint DataCount, uint RecCount, bool *ValidityFlags);
+#if 0 // We use only UpdateECC now.
+    void Process(const uint *Data, uint *Out);
+#endif
+    void UpdateECC(uint DataNum, uint ECCNum, const byte *Data, byte *ECC, size_t BlockSize);
+};
+
+#endif