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#include "Portable.h"
#include "LSBFEncoder.h"
namespace NStream {
namespace NLSBF {
void CEncoder::WriteBits(UINT32 aValue, UINT32 aNumBits)
{
while(aNumBits > 0)
{
UINT32 aNumNewBits = MyMin(aNumBits, m_BitPos);
aNumBits -= aNumNewBits;
UINT32 aMask = (1 << aNumNewBits) - 1;
m_CurByte |= (aValue & aMask) << (8 - m_BitPos);
aValue >>= aNumNewBits;
m_BitPos -= aNumNewBits;
if (m_BitPos == 0)
{
m_Stream.WriteByte(m_CurByte);
m_BitPos = 8;
m_CurByte = 0;
}
}
}
void CReverseEncoder::WriteBits(UINT32 aValue, UINT32 aNumBits)
{
UINT32 aReverseValue = 0;
for(UINT32 i = 0; i < aNumBits; i++)
{
aReverseValue <<= 1;
aReverseValue |= aValue & 1;
aValue >>= 1;
}
m_Encoder->WriteBits(aReverseValue, aNumBits);
}
}}
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