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#ifndef __BITTREECODER_H
#define __BITTREECODER_H
#include "AriBitCoder.h"
#include "RCDefs.h"
//////////////////////////
// CBitTreeEncoder
template <int aNumMoveBits, UINT32 m_NumBitLevels>
class CBitTreeEncoder
{
CMyBitEncoder<aNumMoveBits> m_Models[1 << m_NumBitLevels];
public:
void Init()
{
for(UINT32 i = 1; i < (1 << m_NumBitLevels); i++)
m_Models[i].Init();
}
void Encode(CMyRangeEncoder *aRangeEncoder, UINT32 aSymbol)
{
UINT32 aModelIndex = 1;
for (UINT32 aBitIndex = m_NumBitLevels; aBitIndex > 0 ;)
{
aBitIndex--;
UINT32 aBit = (aSymbol >> aBitIndex ) & 1;
m_Models[aModelIndex].Encode(aRangeEncoder, aBit);
aModelIndex = (aModelIndex << 1) | aBit;
}
};
UINT32 GetPrice(UINT32 aSymbol) const
{
UINT32 aPrice = 0;
UINT32 aModelIndex = 1;
for (UINT32 aBitIndex = m_NumBitLevels; aBitIndex > 0 ;)
{
aBitIndex--;
UINT32 aBit = (aSymbol >> aBitIndex ) & 1;
aPrice += m_Models[aModelIndex].GetPrice(aBit);
aModelIndex = (aModelIndex << 1) + aBit;
}
return aPrice;
}
};
//////////////////////////
// CBitTreeDecoder
template <int aNumMoveBits, UINT32 m_NumBitLevels>
class CBitTreeDecoder
{
CMyBitDecoder<aNumMoveBits> m_Models[1 << m_NumBitLevels];
public:
void Init()
{
for(UINT32 i = 1; i < (1 << m_NumBitLevels); i++)
m_Models[i].Init();
}
UINT32 Decode(CMyRangeDecoder *aRangeDecoder)
{
UINT32 aModelIndex = 1;
RC_INIT_VAR
for(UINT32 aBitIndex = m_NumBitLevels; aBitIndex > 0; aBitIndex--)
{
// aModelIndex = (aModelIndex << 1) + m_Models[aModelIndex].Decode(aRangeDecoder);
RC_GETBIT(aNumMoveBits, m_Models[aModelIndex].m_Probability, aModelIndex)
}
RC_FLUSH_VAR
return aModelIndex - (1 << m_NumBitLevels);
};
};
////////////////////////////////
// CReverseBitTreeEncoder
template <int aNumMoveBits>
class CReverseBitTreeEncoder2
{
CMyBitEncoder<aNumMoveBits> *m_Models;
UINT32 m_NumBitLevels;
public:
CReverseBitTreeEncoder2(): m_Models(0) { }
~CReverseBitTreeEncoder2() { delete []m_Models; }
bool Create(UINT32 aNumBitLevels)
{
m_NumBitLevels = aNumBitLevels;
m_Models = new CMyBitEncoder<aNumMoveBits>[1 << aNumBitLevels];
return (m_Models != 0);
}
void Init()
{
UINT32 aNumModels = 1 << m_NumBitLevels;
for(UINT32 i = 1; i < aNumModels; i++)
m_Models[i].Init();
}
void Encode(CMyRangeEncoder *aRangeEncoder, UINT32 aSymbol)
{
UINT32 aModelIndex = 1;
for (UINT32 i = 0; i < m_NumBitLevels; i++)
{
UINT32 aBit = aSymbol & 1;
m_Models[aModelIndex].Encode(aRangeEncoder, aBit);
aModelIndex = (aModelIndex << 1) | aBit;
aSymbol >>= 1;
}
}
UINT32 GetPrice(UINT32 aSymbol) const
{
UINT32 aPrice = 0;
UINT32 aModelIndex = 1;
for (UINT32 i = m_NumBitLevels; i > 0; i--)
{
UINT32 aBit = aSymbol & 1;
aSymbol >>= 1;
aPrice += m_Models[aModelIndex].GetPrice(aBit);
aModelIndex = (aModelIndex << 1) | aBit;
}
return aPrice;
}
};
////////////////////////////////
// CReverseBitTreeDecoder
template <int aNumMoveBits>
class CReverseBitTreeDecoder2
{
CMyBitDecoder<aNumMoveBits> *m_Models;
UINT32 m_NumBitLevels;
public:
CReverseBitTreeDecoder2(): m_Models(0) { }
~CReverseBitTreeDecoder2() { delete []m_Models; }
bool Create(UINT32 aNumBitLevels)
{
m_NumBitLevels = aNumBitLevels;
m_Models = new CMyBitDecoder<aNumMoveBits>[1 << aNumBitLevels];
return (m_Models != 0);
}
void Init()
{
UINT32 aNumModels = 1 << m_NumBitLevels;
for(UINT32 i = 1; i < aNumModels; i++)
m_Models[i].Init();
}
UINT32 Decode(CMyRangeDecoder *aRangeDecoder)
{
UINT32 aModelIndex = 1;
UINT32 aSymbol = 0;
RC_INIT_VAR
for(UINT32 aBitIndex = 0; aBitIndex < m_NumBitLevels; aBitIndex++)
{
RC_GETBIT2(aNumMoveBits, m_Models[aModelIndex].m_Probability, aModelIndex, ; , aSymbol |= (1 << aBitIndex))
}
RC_FLUSH_VAR
return aSymbol;
};
};
////////////////////////////
// CReverseBitTreeDecoder2
template <int aNumMoveBits, UINT32 m_NumBitLevels>
class CReverseBitTreeDecoder
{
CMyBitDecoder<aNumMoveBits> m_Models[1 << m_NumBitLevels];
public:
void Init()
{
for(UINT32 i = 1; i < (1 << m_NumBitLevels); i++)
m_Models[i].Init();
}
UINT32 Decode(CMyRangeDecoder *aRangeDecoder)
{
UINT32 aModelIndex = 1;
UINT32 aSymbol = 0;
RC_INIT_VAR
for(UINT32 aBitIndex = 0; aBitIndex < m_NumBitLevels; aBitIndex++)
{
RC_GETBIT2(aNumMoveBits, m_Models[aModelIndex].m_Probability, aModelIndex, ; , aSymbol |= (1 << aBitIndex))
}
RC_FLUSH_VAR
return aSymbol;
}
};
#endif
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