src/add-ons/media/plugins/ape_reader/MAClib/UnBitArray.h

   1 #ifndef APE_UNBITARRAY_H
   2 #define APE_UNBITARRAY_H
   3
   4
   5 #include "UnBitArrayBase.h"
   6
   7
   8 class IAPEDecompress;
   9
  10
  11 struct RANGE_CODER_STRUCT_DECOMPRESS
  12 {
  13         unsigned int low;       // low end of interval
  14         unsigned int range;     // length of interval
  15         unsigned int buffer;    // buffer for input/output
  16 };
  17
  18
  19 class CUnBitArray : public CUnBitArrayBase
  20 {
  21 public:
  22                                         CUnBitArray(CIO* pIO, int nVersion);
  23                                         ~CUnBitArray();
  24
  25                         uint    DecodeValue(DECODE_VALUE_METHOD DecodeMethod,
  26                                                 int nParam1 = 0, int nParam2 = 0);
  27
  28                         void    GenerateArray(int * pOutputArray, int nElements,
  29                                                 int nBytesRequired = -1);
  30
  31                         int             DecodeValueRange(UNBIT_ARRAY_STATE & BitArrayState);
  32
  33                         void    FlushState(UNBIT_ARRAY_STATE & BitArrayState);
  34                         void    FlushBitArray();
  35                         void    Finalize();
  36
  37 private:
  38                         void    GenerateArrayRange(int * pOutputArray, int nElements);
  39
  40                         // data
  41                         int             m_nFlushCounter;
  42                         int             m_nFinalizeCounter;
  43
  44                         RANGE_CODER_STRUCT_DECOMPRESS   m_RangeCoderInfo;
  45
  46                         uint32  m_nRefillBitThreshold;
  47
  48         // functions
  49         inline  int             RangeDecodeFast(int nShift);
  50         inline  int             RangeDecodeFastWithUpdate(int nShift);
  51         inline  uchar   GetC();
  52 };
  53
  54
  55 #endif // #ifndef APE_UNBITARRAY_H