block.h

来自「H.264编码实现」· C头文件 代码 · 共 141 行

/*!
 ************************************************************************
 * \file block.h
 *
 * \brief
 *    constant arrays for single block processing
 *
 * \author
 *    Inge Lille-Langoy               <[e-mail]>    \n
 *    Telenor Satellite Services                                         \n
 *    P.O.Box 6914 St.Olavs plass                                        \n
 *    N-0130 Oslo, Norway
 *
 ************************************************************************
 */

#ifndef _BLOCK_H_
#define _BLOCK_H_


//! single scan pattern
const byte SNGL_SCAN[16][2] =
{
  {0,0},{1,0},{0,1},{0,2},
  {1,1},{2,0},{3,0},{2,1},
  {1,2},{0,3},{1,3},{2,2},
  {3,1},{3,2},{2,3},{3,3}
};

//! field scan pattern
const byte FIELD_SCAN[16][2] =
{
  {0,0},{0,1},{1,0},{0,2},
  {0,3},{1,1},{1,2},{1,3},
  {2,0},{2,1},{2,2},{2,3},
  {3,0},{3,1},{3,2},{3,3}
};


//! array used to find expencive coefficients
const byte COEFF_COST4x4[2][16] =
{
  {3,2,2,1,1,1,0,0,0,0,0,0,0,0,0,0},
  {9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9}
};

const byte SCAN_YUV420  [4][2] =
{
  {0,0},
  {0,1},
  {0,2},
  {0,3}
};

//! single scan pattern
const byte SCAN_YUV422  [8][2] =
{
  {0,0},{0,1},
  {1,0},{0,2},
  {0,3},{1,1},
  {1,2},{1,3}
};


//! look up tables for FRExt-chroma support
const unsigned char hor_offset[4][4][4] =  {
  {
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 4, 0, 4},
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 4, 0, 4},
    {0, 4, 0, 4},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 4, 0, 4},
    {8,12, 8,12},
    {0, 4, 0, 4},
    {8,12, 8,12}
  }
};

const unsigned char ver_offset[4][4][4] =  { 
  {
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 0, 4, 4},
    {0, 0, 0, 0},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 0, 4, 4},
    {8, 8,12,12},
    {0, 0, 0, 0},
    {0, 0, 0, 0}
  },
  {
    {0, 0, 4, 4},
    {0, 0, 4, 4},
    {8, 8,12,12},
    {8, 8,12,12}
  }
};

static const int A[4][4] = {
  { 16, 20, 16, 20},
  { 20, 25, 20, 25},
  { 16, 20, 16, 20},
  { 20, 25, 20, 25}
};

static unsigned char cbp_blk_chroma[8][4] = {
  {16, 17, 18, 19},
  {20, 21, 22, 23},
  {24, 25, 26, 27},
  {28, 29, 30, 31},
  {32, 33, 34, 35},
  {36, 37, 38, 39},
  {40, 41, 42, 43},
  {44, 45, 46, 47} 
};

#endif