?? transform8x8.c
字號:
/*!
***************************************************************************
* \file transform8x8.c
*
* \brief
* ....
*
* \author
* Yuri Vatis and Jan Muenster <vatis@hhi.de>, <muenster@hhi.de>
*
* \date
* 12. October 2003
**************************************************************************
*/
#include <stdlib.h>
#include "transform8x8.h"
#define Q_BITS_8 16
#define DQ_BITS_8 6
#define DQ_ROUND_8 (1<<(DQ_BITS_8-1))
static const int quant_coef8[6][8][8] =
{
{
{13107, 12222, 16777, 12222, 13107, 12222, 16777, 12222},
{12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428},
{16777, 15481, 20972, 15481, 16777, 15481, 20972, 15481},
{12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428},
{13107, 12222, 16777, 12222, 13107, 12222, 16777, 12222},
{12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428},
{16777, 15481, 20972, 15481, 16777, 15481, 20972, 15481},
{12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428}
},
{
{11916, 11058, 14980, 11058, 11916, 11058, 14980, 11058},
{11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826},
{14980, 14290, 19174, 14290, 14980, 14290, 19174, 14290},
{11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826},
{11916, 11058, 14980, 11058, 11916, 11058, 14980, 11058},
{11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826},
{14980, 14290, 19174, 14290, 14980, 14290, 19174, 14290},
{11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826}
},
{
{10082, 9675, 12710, 9675, 10082, 9675, 12710, 9675},
{9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943},
{12710, 11985, 15978, 11985, 12710, 11985, 15978, 11985},
{9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943},
{10082, 9675, 12710, 9675, 10082, 9675, 12710, 9675},
{9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943},
{12710, 11985, 15978, 11985, 12710, 11985, 15978, 11985},
{9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943}
},
{
{9362, 8931, 11984, 8931, 9362, 8931, 11984, 8931},
{8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228},
{11984, 11259, 14913, 11259, 11984, 11259, 14913, 11259},
{8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228},
{9362, 8931, 11984, 8931, 9362, 8931, 11984, 8931},
{8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228},
{11984, 11259, 14913, 11259, 11984, 11259, 14913, 11259},
{8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228}
},
{
{8192, 7740, 10486, 7740, 8192, 7740, 10486, 7740},
{7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346},
{10486, 9777, 13159, 9777, 10486, 9777, 13159, 9777},
{7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346},
{8192, 7740, 10486, 7740, 8192, 7740, 10486, 7740},
{7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346},
{10486, 9777, 13159, 9777, 10486, 9777, 13159, 9777},
{7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346}
},
{
{7282, 6830, 9118, 6830, 7282, 6830, 9118, 6830},
{6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428},
{9118, 8640, 11570, 8640, 9118, 8640, 11570, 8640},
{6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428},
{7282, 6830, 9118, 6830, 7282, 6830, 9118, 6830},
{6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428},
{9118, 8640, 11570, 8640, 9118, 8640, 11570, 8640},
{6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428}
}
};
static const int dequant_coef8[6][8][8] =
{
{
{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}
}
};
#ifdef _NEW_8x8_ARRAYS_INCLUDED_
//! single scan pattern
const byte SNGL_SCAN8x8[64][2] = {
{0,0}, {1,0}, {0,1}, {0,2}, {1,1}, {2,0}, {3,0}, {2,1}, {1,2}, {0,3}, {0,4}, {1,3}, {2,2}, {3,1}, {4,0}, {5,0},
{4,1}, {3,2}, {2,3}, {1,4}, {0,5}, {0,6}, {1,5}, {2,4}, {3,3}, {4,2}, {5,1}, {6,0}, {7,0}, {6,1}, {5,2}, {4,3},
{3,4}, {2,5}, {1,6}, {0,7}, {1,7}, {2,6}, {3,5}, {4,4}, {5,3}, {6,2}, {7,1}, {7,2}, {6,3}, {5,4}, {4,5}, {3,6},
{2,7}, {3,7}, {4,6}, {5,5}, {6,4}, {7,3}, {7,4}, {6,5}, {5,6}, {4,7}, {5,7}, {6,6}, {7,5}, {7,6}, {6,7}, {7,7}
};
//! field scan pattern
const byte FIELD_SCAN8x8[64][2] = {
{0,0}, {0,1}, {0,2}, {1,0}, {1,1}, {0,3}, {0,4}, {1,2}, {2,0}, {2,1}, {1,3}, {0,5}, {0,6}, {1,4}, {2,2}, {3,0},
{3,1}, {2,3}, {1,5}, {0,7}, {1,6}, {2,4}, {3,2}, {4,0}, {4,1}, {3,3}, {2,5}, {1,7}, {2,6}, {3,4}, {4,2}, {5,0},
{5,1}, {4,3}, {3,5}, {2,7}, {3,6}, {4,4}, {5,2}, {6,0}, {6,1}, {5,3}, {4,5}, {3,7}, {4,6}, {5,4}, {6,2}, {7,0},
{7,1}, {6,3}, {5,5}, {4,7}, {5,6}, {6,4}, {7,2}, {7,3}, {6,5}, {5,7}, {6,6}, {7,4}, {7,5}, {6,7}, {7,6}, {7,7}
};
//! array used to find expencive coefficients
const byte COEFF_COST8x8[64] =
{
3,3,3,3,2,2,2,2,2,2,2,2,1,1,1,1,
1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
#endif
// Notation for comments regarding prediction and predictors.
// The pels of the 4x4 block are labelled a..p. The predictor pels above
// are labelled A..H, from the left I..P, and from above left X, as follows:
//
// Z A B C D E F G H I J K L M N O P
// Q a1 b1 c1 d1 e1 f1 g1 h1
// R a2 b2 c2 d2 e2 f2 g2 h2
// S a3 b3 c3 d3 e3 f3 g3 h3
// T a4 b4 c4 d4 e4 f4 g4 h4
// U a5 b5 c5 d5 e5 f5 g5 h5
// V a6 b6 c6 d6 e6 f6 g6 h6
// W a7 b7 c7 d7 e7 f7 g7 h7
// X a8 b8 c8 d8 e8 f8 g8 h8
// Predictor array index definitions
#define P_Z (PredPel[0])
#define P_A (PredPel[1])
#define P_B (PredPel[2])
#define P_C (PredPel[3])
#define P_D (PredPel[4])
#define P_E (PredPel[5])
#define P_F (PredPel[6])
#define P_G (PredPel[7])
#define P_H (PredPel[8])
#define P_I (PredPel[9])
#define P_J (PredPel[10])
#define P_K (PredPel[11])
#define P_L (PredPel[12])
#define P_M (PredPel[13])
#define P_N (PredPel[14])
#define P_O (PredPel[15])
#define P_P (PredPel[16])
#define P_Q (PredPel[17])
#define P_R (PredPel[18])
#define P_S (PredPel[19])
#define P_T (PredPel[20])
#define P_U (PredPel[21])
#define P_V (PredPel[22])
#define P_W (PredPel[23])
#define P_X (PredPel[24])
/*!
************************************************************************
* \brief
* Make intra 8x8 prediction according to all 9 prediction modes.
* The routine uses left and upper neighbouring points from
* previous coded blocks to do this (if available). Notice that
* inaccessible neighbouring points are signalled with a negative
* value in the predmode array .
*
* \para Input:
* Starting point of current 8x8 block image posision
*
* \para Output:
* none
************************************************************************
*/
int intrapred8x8( struct img_par *img, //!< image parameters
int b8)
{
int i,j;
int s0;
int PredPel[25]; // array of predictor pels
imgpel **imgY = dec_picture->imgY; // For MB level frame/field coding tools -- set default to imgY
int mb_nr=img->current_mb_nr;
PixelPos pix_a[8];
PixelPos pix_b, pix_c, pix_d;
int block_available_up;
int block_available_left;
int block_available_up_left;
int block_available_up_right;
int img_block_x = (img->mb_x)*4 + 2*(b8%2);
int img_block_y = (img->mb_y)*4 + 2*(b8/2);
int ioff = (b8%2)*8;
int joff = (b8/2)*8;
byte predmode = img->ipredmode[img_block_x][img_block_y];
for (i=0;i<8;i++)
{
getNeighbour(mb_nr, ioff -1 , joff +i , 1, &pix_a[i]);
}
getNeighbour(mb_nr, ioff , joff -1 , 1, &pix_b);
getNeighbour(mb_nr, ioff +8 , joff -1 , 1, &pix_c);
getNeighbour(mb_nr, ioff -1 , joff -1 , 1, &pix_d);
pix_c.available = pix_c.available &&!(ioff == 8 && joff == 8);
if (active_pps->constrained_intra_pred_flag)
{
for (i=0, block_available_left=1; i<8;i++)
block_available_left &= pix_a[i].available ? img->intra_block[pix_a[i].mb_addr]: 0;
block_available_up = pix_b.available ? img->intra_block [pix_b.mb_addr] : 0;
block_available_up_right = pix_c.available ? img->intra_block [pix_c.mb_addr] : 0;
block_available_up_left = pix_d.available ? img->intra_block [pix_d.mb_addr] : 0;
}
else
{
block_available_left = pix_a[0].available;
block_available_up = pix_b.available;
block_available_up_right = pix_c.available;
block_available_up_left = pix_d.available;
}
// *left_available = block_available_left;
// *up_available = block_available_up;
// *all_available = block_available_up && block_available_left && block_available_up_left;
// form predictor pels
// form predictor pels
if (block_available_up)
{
P_A = imgY[pix_b.pos_y][pix_b.pos_x+0];
P_B = imgY[pix_b.pos_y][pix_b.pos_x+1];
P_C = imgY[pix_b.pos_y][pix_b.pos_x+2];
P_D = imgY[pix_b.pos_y][pix_b.pos_x+3];
P_E = imgY[pix_b.pos_y][pix_b.pos_x+4];
P_F = imgY[pix_b.pos_y][pix_b.pos_x+5];
P_G = imgY[pix_b.pos_y][pix_b.pos_x+6];
P_H = imgY[pix_b.pos_y][pix_b.pos_x+7];
}
else
{
P_A = P_B = P_C = P_D = P_E = P_F = P_G = P_H = img->dc_pred_value;
}
if (block_available_up_right)
{
P_I = imgY[pix_c.pos_y][pix_c.pos_x+0];
P_J = imgY[pix_c.pos_y][pix_c.pos_x+1];
P_K = imgY[pix_c.pos_y][pix_c.pos_x+2];
P_L = imgY[pix_c.pos_y][pix_c.pos_x+3];
P_M = imgY[pix_c.pos_y][pix_c.pos_x+4];
P_N = imgY[pix_c.pos_y][pix_c.pos_x+5];
P_O = imgY[pix_c.pos_y][pix_c.pos_x+6];
P_P = imgY[pix_c.pos_y][pix_c.pos_x+7];
}
else
{
P_I = P_J = P_K = P_L = P_M = P_N = P_O = P_P = P_H;
}
if (block_available_left)
{
P_Q = imgY[pix_a[0].pos_y][pix_a[0].pos_x];
P_R = imgY[pix_a[1].pos_y][pix_a[1].pos_x];
P_S = imgY[pix_a[2].pos_y][pix_a[2].pos_x];
P_T = imgY[pix_a[3].pos_y][pix_a[3].pos_x];
P_U = imgY[pix_a[4].pos_y][pix_a[4].pos_x];
P_V = imgY[pix_a[5].pos_y][pix_a[5].pos_x];
P_W = imgY[pix_a[6].pos_y][pix_a[6].pos_x];
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -