Contexts.h

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/** \file     Contexts.h
 *  \brief    Classes providing probability descriptions and contexts (header)
 */

#ifndef __CONTEXTS__
#define __CONTEXTS__

#include "CommonDef.h"
#include "Slice.h"

#include <vector>

static constexpr int     PROB_BITS   = 15;   // Nominal number of bits to represent probabilities
static constexpr int     PROB_BITS_0 = 10;   // Number of bits to represent 1st estimate
static constexpr int     PROB_BITS_1 = 14;   // Number of bits to represent 2nd estimate
static constexpr int     MASK_0      = ~(~0u << PROB_BITS_0) << (PROB_BITS - PROB_BITS_0);
static constexpr int     MASK_1      = ~(~0u << PROB_BITS_1) << (PROB_BITS - PROB_BITS_1);
static constexpr uint8_t DWS         = 8;   // 0x47 Default window sizes

struct BinFracBits
{
  uint32_t intBits[2];
};


enum BPMType
{
  BPM_Undefined = 0,
  BPM_Std,
  BPM_NUM
};

class ProbModelTables
{
protected:
  static const BinFracBits m_binFracBits[256];
  static const uint8_t      m_RenormTable_32  [ 32];          // Std         MP   MPI