25 lines
669 B
C++
25 lines
669 B
C++
|
/****************************************************************************
|
||
|
|
* Contents: 'Carryless rangecoder' by Dmitry Subbotin *
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
const uint TOP=1 << 24, BOT=1 << 15;
|
||
|
|
|
||
|
|
class RangeCoder
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
void InitDecoder(Unpack *UnpackRead);
|
||
|
|
inline int GetCurrentCount();
|
||
|
|
inline uint GetCurrentShiftCount(uint SHIFT);
|
||
|
|
inline void Decode();
|
||
|
|
inline void PutChar(unsigned int c);
|
||
|
|
inline unsigned int GetChar();
|
||
|
|
|
||
|
|
uint low, code, range;
|
||
|
|
struct SUBRANGE
|
||
|
|
{
|
||
|
|
uint LowCount, HighCount, scale;
|
||
|
|
} SubRange;
|
||
|
|
|
||
|
|
Unpack *UnpackRead;
|
||
|
|
};
|