winamp/Src/h264dec/ldecod/inc/quant.h

/*!
 ************************************************************************
 * \file quant.h
 *
 * \brief
 *    definitions for quantization functions
 *
 * \author
 *
 ************************************************************************
 */

#ifndef _QUANT_H_
#define _QUANT_H_

// exported variables
static const int dequant_coef8[6][64] =
{
  {
    20,  19, 25, 19, 20, 19, 25, 19,
    19,  18, 24, 18, 19, 18, 24, 18,
    25,  24, 32, 24, 25, 24, 32, 24,
    19,  18, 24, 18, 19, 18, 24, 18,
    20,  19, 25, 19, 20, 19, 25, 19,
    19,  18, 24, 18, 19, 18, 24, 18,
    25,  24, 32, 24, 25, 24, 32, 24,
    19,  18, 24, 18, 19, 18, 24, 18
  },
  {
    22,  21, 28, 21, 22, 21, 28, 21,
    21,  19, 26, 19, 21, 19, 26, 19,
    28,  26, 35, 26, 28, 26, 35, 26,
    21,  19, 26, 19, 21, 19, 26, 19,
    22,  21, 28, 21, 22, 21, 28, 21,
    21,  19, 26, 19, 21, 19, 26, 19,
    28,  26, 35, 26, 28, 26, 35, 26,
    21,  19, 26, 19, 21, 19, 26, 19
  },
  {
    26,  24, 33, 24, 26, 24, 33, 24,
    24,  23, 31, 23, 24, 23, 31, 23,
    33,  31, 42, 31, 33, 31, 42, 31,
    24,  23, 31, 23, 24, 23, 31, 23,
    26,  24, 33, 24, 26, 24, 33, 24,
    24,  23, 31, 23, 24, 23, 31, 23,
    33,  31, 42, 31, 33, 31, 42, 31,
    24,  23, 31, 23, 24, 23, 31, 23
  },
  {
    28,  26, 35, 26, 28, 26, 35, 26,
    26,  25, 33, 25, 26, 25, 33, 25,
    35,  33, 45, 33, 35, 33, 45, 33,
    26,  25, 33, 25, 26, 25, 33, 25,
    28,  26, 35, 26, 28, 26, 35, 26,
    26,  25, 33, 25, 26, 25, 33, 25,
    35,  33, 45, 33, 35, 33, 45, 33,
    26,  25, 33, 25, 26, 25, 33, 25
  },
  {
    32,  30, 40, 30, 32, 30, 40, 30,
    30,  28, 38, 28, 30, 28, 38, 28,
    40,  38, 51, 38, 40, 38, 51, 38,
    30,  28, 38, 28, 30, 28, 38, 28,
    32,  30, 40, 30, 32, 30, 40, 30,
    30,  28, 38, 28, 30, 28, 38, 28,
    40,  38, 51, 38, 40, 38, 51, 38,
    30,  28, 38, 28, 30, 28, 38, 28
  },
  {
    36,  34, 46, 34, 36, 34, 46, 34,
    34,  32, 43, 32, 34, 32, 43, 32,
    46,  43, 58, 43, 46, 43, 58, 43,
    34,  32, 43, 32, 34, 32, 43, 32,
    36,  34, 46, 34, 36, 34, 46, 34,
    34,  32, 43, 32, 34, 32, 43, 32,
    46,  43, 58, 43, 46, 43, 58, 43,
    34,  32, 43, 32, 34, 32, 43, 32
  }
};


//! Dequantization coefficients
static const int dequant_coef[6][4][4] = {
  {
    { 10, 13, 10, 13},
    { 13, 16, 13, 16},
    { 10, 13, 10, 13},
    { 13, 16, 13, 16}},
  {
    { 11, 14, 11, 14},
    { 14, 18, 14, 18},
    { 11, 14, 11, 14},
    { 14, 18, 14, 18}},
  {
    { 13, 16, 13, 16},
    { 16, 20, 16, 20},
    { 13, 16, 13, 16},
    { 16, 20, 16, 20}},
  {
    { 14, 18, 14, 18},
    { 18, 23, 18, 23},
    { 14, 18, 14, 18},
    { 18, 23, 18, 23}},
  {
    { 16, 20, 16, 20},
    { 20, 25, 20, 25},
    { 16, 20, 16, 20},
    { 20, 25, 20, 25}},
  {
    { 18, 23, 18, 23},
    { 23, 29, 23, 29},
    { 18, 23, 18, 23},
    { 23, 29, 23, 29}}
};

static const int quant_coef[6][4][4] = {
  {
    { 13107,  8066, 13107,  8066},
    {  8066,  5243,  8066,  5243},
    { 13107,  8066, 13107,  8066},
    {  8066,  5243,  8066,  5243}},
  {
    { 11916,  7490, 11916,  7490},
    {  7490,  4660,  7490,  4660},
    { 11916,  7490, 11916,  7490},
    {  7490,  4660,  7490,  4660}},
  {
    { 10082,  6554, 10082,  6554},
    {  6554,  4194,  6554,  4194},
    { 10082,  6554, 10082,  6554},
    {  6554,  4194,  6554,  4194}},
  {
    {  9362,  5825,  9362,  5825},
    {  5825,  3647,  5825,  3647},
    {  9362,  5825,  9362,  5825},
    {  5825,  3647,  5825,  3647}},
  {
    {  8192,  5243,  8192,  5243},
    {  5243,  3355,  5243,  3355},
    {  8192,  5243,  8192,  5243},
    {  5243,  3355,  5243,  3355}},
  {
    {  7282,  4559,  7282,  4559},
    {  4559,  2893,  4559,  2893},
    {  7282,  4559,  7282,  4559},
    {  4559,  2893,  4559,  2893}}
};

// SP decoding parameter (EQ. 8-425)
static const int A[4][4] = {
  { 16, 20, 16, 20},
  { 20, 25, 20, 25},
  { 16, 20, 16, 20},
  { 20, 25, 20, 25}
};

// exported functions
// quantization initialization
extern void init_qp_process (VideoParameters *p_Vid);
extern void free_qp_matrices(VideoParameters *p_Vid);

// For Q-matrix
extern void assign_quant_params   (Slice *currslice);
extern void CalculateQuant4x4Param(Slice *currslice);


#endif