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/** \file     TEncBinCoderCABAC.cpp
    \brief    binary entropy encoder of CABAC
*/

#include "TEncBinCoderCABACCounter.h"
#include "TLibCommon/TComRom.h"

#if FAST_BIT_EST

//! \ingroup TLibEncoder
//! \{


TEncBinCABACCounter::TEncBinCABACCounter()
{
}

TEncBinCABACCounter::~TEncBinCABACCounter()
{
}

Void TEncBinCABACCounter::finish()
{
  m_pcTComBitIf->write(0, UInt(m_fracBits >> 15) );
  m_fracBits &= 32767;
}

UInt TEncBinCABACCounter::getNumWrittenBits()
{
  return m_pcTComBitIf->getNumberOfWrittenBits() + UInt( m_fracBits >> 15 );
}

/**
 * \brief Encode bin
 *
 * \param binValue   bin value
 * \param rcCtxModel context model
 */
Void TEncBinCABACCounter::encodeBin( UInt binValue, ContextModel &rcCtxModel )
{
  m_uiBinsCoded += m_binCountIncrement;
  
  m_fracBits += rcCtxModel.getEntropyBits( binValue );
  rcCtxModel.update( binValue );
}

/**
 * \brief Encode equiprobable bin
 *
 * \param binValue bin value
 */
Void TEncBinCABACCounter::encodeBinEP( UInt binValue )
{
  m_uiBinsCoded += m_binCountIncrement;
  m_fracBits += 32768;
}

/**
 * \brief Encode equiprobable bins
 *
 * \param binValues bin values
 * \param numBins number of bins
 */
Void TEncBinCABACCounter::encodeBinsEP( UInt binValues, Int numBins )
{
  m_uiBinsCoded += numBins & -m_binCountIncrement;
  m_fracBits += 32768 * numBins;
}

/**
 * \brief Encode terminating bin
 *
 * \param binValue bin value
 */
Void TEncBinCABACCounter::encodeBinTrm( UInt binValue )
{
  m_uiBinsCoded += m_binCountIncrement;
  m_fracBits += ContextModel::getEntropyBitsTrm( binValue );
}

//! \}
#endif

