initial checkin

MAC_SDK/Source/MACLib/BitArray.h

@@ -0,0 +1,62 @@
+#ifndef APE_BITARRAY_H
+#define APE_BITARRAY_H
+
+#include "IO.h"
+#include "MD5.h"
+
+//#define BUILD_RANGE_TABLE
+
+struct RANGE_CODER_STRUCT_COMPRESS
+{
+    unsigned int low;        // low end of interval
+    unsigned int range;        // length of interval
+    unsigned int help;        // bytes_to_follow resp. intermediate value
+    unsigned char buffer;    // buffer for input / output
+};
+
+struct BIT_ARRAY_STATE
+{
+    uint32    k;
+    uint32    nKSum;
+};
+
+class CBitArray
+{
+public:
+    
+    // construction / destruction
+    CBitArray(CIO *pIO);
+    ~CBitArray();
+
+    // encoding
+    int EncodeUnsignedLong(unsigned int n);
+    int EncodeValue(int nEncode, BIT_ARRAY_STATE & BitArrayState);
+    int EncodeBits(unsigned int nValue, int nBits);
+
+    // output (saving)
+    int OutputBitArray(BOOL bFinalize = FALSE);
+    
+    // other functions
+    void Finalize();
+    void AdvanceToByteBoundary();
+    inline uint32 GetCurrentBitIndex() { return m_nCurrentBitIndex; }
+    void FlushState(BIT_ARRAY_STATE & BitArrayState);
+    void FlushBitArray();
+    inline CMD5Helper & GetMD5Helper() { return m_MD5; }
+        
+private:
+    
+    // data members
+    uint32 *            m_pBitArray;
+    CIO    *                        m_pIO;
+    uint32            m_nCurrentBitIndex;
+    RANGE_CODER_STRUCT_COMPRESS    m_RangeCoderInfo;
+    CMD5Helper                    m_MD5;
+
+#ifdef BUILD_RANGE_TABLE
+    void OutputRangeTable();
+#endif
+    
+};
+
+#endif // #ifndef APE_BITARRAY_H