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#ifndef __DEFLATE_ENCODER_H
#define __DEFLATE_ENCODER_H
#include "BinTree3Z.h"
#include "LSBFEncoder.h"
#include "HuffmanEncoder.h"
#include "Const.h"
namespace NDeflate {
namespace NEncoder {
struct CCodeValue
{
BYTE Flag;
union
{
BYTE Imm;
BYTE Len;
};
UINT16 Pos;
};
class COnePosMatches
{
public:
UINT16 *MatchDistances;
UINT16 LongestMatchLength;
UINT16 LongestMatchDistance;
void Init(UINT16 *aMatchDistances)
{
MatchDistances = aMatchDistances;
};
};
struct COptimal
{
UINT32 Price;
UINT16 PosPrev;
UINT16 BackPrev;
};
const int kNumOpts = 0x1000;
class CCoder
{
UINT32 m_FinderPos;
COptimal m_Optimum[kNumOpts];
NBT3Z::CInTree m_MatchFinder;
NStream::NLSBF::CEncoder m_OutStream;
NStream::NLSBF::CReverseEncoder m_ReverseOutStream;
NCompression::NHuffman::CEncoder m_MainCoder;
NCompression::NHuffman::CEncoder m_DistCoder;
NCompression::NHuffman::CEncoder m_LevelCoder;
BYTE m_LastLevels[kMaxTableSize];
UINT32 m_ValueIndex;
CCodeValue *m_Values;
UINT32 m_OptimumEndIndex;
UINT32 m_OptimumCurrentIndex;
UINT32 m_AdditionalOffset;
UINT32 m_LongestMatchLength;
UINT32 m_LongestMatchDistance;
UINT16 *m_MatchDistances;
UINT32 m_NumFastBytes;
UINT32 m_MatchLengthEdge;
BYTE m_LiteralPrices[256];
BYTE m_LenPrices[kNumLenCombinations];
BYTE m_PosPrices[kDistTableSize];
UINT32 m_CurrentBlockUncompressedSize;
COnePosMatches *m_OnePosMatchesArray;
UINT16 *m_OnePosMatchesMemory;
UINT64 m_BlockStartPostion;
int m_NumPasses;
bool m_Created;
HRESULT Create();
void Free();
void GetBacks(UINT32 aPos);
void ReadGoodBacks();
void MovePos(UINT32 aNum);
UINT32 Backward(UINT32 &aBackRes, UINT32 aCur);
UINT32 GetOptimal(UINT32 &aBackRes);
void InitStructures();
void CodeLevelTable(BYTE *aNewLevels, int aNumLevels, bool aCodeMode);
int WriteTables(bool aWriteMode, bool anFinalBlock);
void CopyBackBlockOp(UINT32 aDistance, UINT32 aLength);
void WriteBlockData(bool aWriteMode, bool anFinalBlock);
HRESULT CodeReal(ISequentialInStream *anInStream, ISequentialOutStream *anOutStream, const UINT64 *anInSize);
public:
CCoder();
~CCoder();
HRESULT SetEncoderNumPasses(UINT32 A);
HRESULT SetEncoderNumFastBytes(UINT32 A);
HRESULT Code(ISequentialInStream *anInStream, ISequentialOutStream *anOutStream, const UINT64 *anInSize);
};
}}
#endif
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