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

   1 #ifndef APE_UNBITARRAYBASE_H
   2 #define APE_UNBITARRAYBASE_H
   3
   4
   5 class IAPEDecompress;
   6 class CIO;
   7
   8
   9 struct UNBIT_ARRAY_STATE
  10 {
  11         uint32 k;
  12         uint32 nKSum;
  13 };
  14
  15 enum DECODE_VALUE_METHOD
  16 {
  17         DECODE_VALUE_METHOD_UNSIGNED_INT,
  18         DECODE_VALUE_METHOD_UNSIGNED_RICE,
  19         DECODE_VALUE_METHOD_X_BITS
  20 };
  21
  22
  23 class CUnBitArrayBase
  24 {
  25 public:
  26         virtual                 ~CUnBitArrayBase() {}
  27
  28         virtual int             FillBitArray();
  29         virtual int             FillAndResetBitArray(int nFileLocation = -1,
  30                                                 int nNewBitIndex = 0);
  31
  32         virtual void    GenerateArray(int * pOutputArray, int nElements,
  33                                                 int nBytesRequired = -1) {}
  34         virtual uint    DecodeValue(DECODE_VALUE_METHOD DecodeMethod,
  35                                                 int nParam1 = 0, int nParam2 = 0) { return 0; }
  36
  37         virtual void    AdvanceToByteBoundary();
  38
  39         virtual int             DecodeValueRange(UNBIT_ARRAY_STATE& BitArrayState)
  40                                                 { return 0; }
  41         virtual void    FlushState(UNBIT_ARRAY_STATE& BitArrayState) {}
  42         virtual void    FlushBitArray() {}
  43         virtual void    Finalize() {}
  44
  45 protected:
  46         virtual int             CreateHelper(CIO* pIO, int nBytes, int nVersion);
  47         virtual uint32  DecodeValueXBits(uint32 nBits);
  48
  49                         uint32 m_nElements;
  50                         uint32 m_nBytes;
  51                         uint32 m_nBits;
  52
  53                         int m_nVersion;
  54                         CIO * m_pIO;
  55
  56                         uint32 m_nCurrentBitIndex;
  57                         uint32 * m_pBitArray;
  58 };
  59
  60 CUnBitArrayBase* CreateUnBitArray(IAPEDecompress* pAPEDecompress, int nVersion);
  61
  62
  63 #endif // #ifndef APE_UNBITARRAYBASE_H