initial checkin

MAC_SDK/Source/MACLib/UnBitArray.h

@@ -0,0 +1,51 @@
+#ifndef APE_UNBITARRAY_H
+#define APE_UNBITARRAY_H
+
+#include "UnBitArrayBase.h"
+
+class IAPEDecompress;
+
+struct RANGE_CODER_STRUCT_DECOMPRESS
+{
+    unsigned int low;       // low end of interval
+    unsigned int range;     // length of interval
+    unsigned int buffer;    // buffer for input/output
+};
+
+class CUnBitArray : public CUnBitArrayBase
+{
+public:
+
+    // construction/destruction
+    CUnBitArray(CIO * pIO, int nVersion);
+    ~CUnBitArray();
+
+    unsigned int DecodeValue(DECODE_VALUE_METHOD DecodeMethod, int nParam1 = 0, int nParam2 = 0);
+    
+    void GenerateArray(int * pOutputArray, int nElements, int nBytesRequired = -1);
+    
+    int DecodeValueRange(UNBIT_ARRAY_STATE & BitArrayState);
+
+    void FlushState(UNBIT_ARRAY_STATE & BitArrayState);
+    void FlushBitArray();
+    void Finalize();
+    
+private:
+
+    void GenerateArrayRange(int * pOutputArray, int nElements);
+    
+    // data 
+    int m_nFlushCounter;
+    int m_nFinalizeCounter;
+    
+    RANGE_CODER_STRUCT_DECOMPRESS    m_RangeCoderInfo;
+    
+    uint32 m_nRefillBitThreshold;
+    
+    // functions
+    inline int RangeDecodeFast(int nShift);
+    inline int RangeDecodeFastWithUpdate(int nShift);
+    inline unsigned char GetC();
+};
+
+#endif // #ifndef APE_UNBITARRAY_H