1 |
|
#include <stdlib.h> |
2 |
|
#include <string.h> |
3 |
|
#include <math.h> |
4 |
|
|
5 |
|
#include "../portab.h" |
6 |
|
#include "../global.h" |
7 |
|
#include "image.h" |
8 |
|
#include "postprocessing.h" |
9 |
|
|
10 |
|
void |
11 |
|
image_deblock(IMAGE * img, int edged_width, |
12 |
|
const MACROBLOCK * mbs, int mb_width, int mb_height, int mb_stride, |
13 |
|
int flags) |
14 |
|
{ |
15 |
|
const int edged_width2 = edged_width /2; |
16 |
|
int i,j; |
17 |
|
int quant; |
18 |
|
|
19 |
|
/* luma: j,i in block units */ |
20 |
|
if ((flags & XVID_DEC_DEBLOCKY)) |
21 |
|
{ |
22 |
|
for (j = 1; j < mb_height*2; j++) /* horizontal deblocking */ |
23 |
|
for (i = 0; i < mb_width*2; i++) |
24 |
|
{ |
25 |
|
quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; |
26 |
|
deblock8x8_h(img->y + j*8*edged_width + i*8, edged_width, quant); |
27 |
|
} |
28 |
|
|
29 |
|
for (j = 0; j < mb_height*2; j++) /* vertical deblocking */ |
30 |
|
for (i = 1; i < mb_width*2; i++) |
31 |
|
{ |
32 |
|
quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; |
33 |
|
deblock8x8_v(img->y + j*8*edged_width + i*8, edged_width, quant); |
34 |
|
} |
35 |
|
} |
36 |
|
|
37 |
|
|
38 |
|
/* chroma */ |
39 |
|
if ((flags & XVID_DEC_DEBLOCKUV)) |
40 |
|
{ |
41 |
|
for (j = 1; j < mb_height; j++) /* horizontal deblocking */ |
42 |
|
for (i = 0; i < mb_width; i++) |
43 |
|
{ |
44 |
|
quant = mbs[(j+0)*mb_stride + i].quant; |
45 |
|
deblock8x8_h(img->u + j*8*edged_width2 + i*8, edged_width2, quant); |
46 |
|
deblock8x8_h(img->v + j*8*edged_width2 + i*8, edged_width2, quant); |
47 |
|
} |
48 |
|
|
49 |
|
for (j = 0; j < mb_height; j++) /* vertical deblocking */ |
50 |
|
for (i = 1; i < mb_width; i++) |
51 |
|
{ |
52 |
|
quant = mbs[(j+0)*mb_stride + i].quant; |
53 |
|
deblock8x8_v(img->u + j*8*edged_width2 + i*8, edged_width2, quant); |
54 |
|
deblock8x8_v(img->v + j*8*edged_width2 + i*8, edged_width2, quant); |
55 |
|
} |
56 |
|
} |
57 |
|
} |
58 |
|
|
59 |
|
#define THR1 2 |
60 |
|
#define THR2 6 |
61 |
|
|
62 |
|
void deblock8x8_h(uint8_t *img, int stride, int quant) |
63 |
|
{ |
64 |
|
int i, j; |
65 |
|
int eq_cnt; |
66 |
|
uint8_t *v[10], p0, p9; |
67 |
|
int min, max; |
68 |
|
int a30, a31, a32; |
69 |
|
int diff, limit; |
70 |
|
|
71 |
|
for(j = 0; j < 8; j++) { |
72 |
|
eq_cnt = 0; |
73 |
|
|
74 |
|
/* Load pixel addresses for filtering */ |
75 |
|
|
76 |
|
for(i = 0; i < 10; i++) |
77 |
|
v[i] = img + (i-5)*stride + j; |
78 |
|
|
79 |
|
/* First, decide whether to use default or DC-offset mode */ |
80 |
|
|
81 |
|
for(i = 0; i < 9; i++) |
82 |
|
{ |
83 |
|
if(ABS(*v[i] - *v[(i+1)]) < THR1) |
84 |
|
eq_cnt++; |
85 |
|
} |
86 |
|
|
87 |
|
if(eq_cnt < THR2) { /* Default mode */ |
88 |
|
|
89 |
|
a30 = (*v[3] * 2 - *v[4] * 5 + *v[5] * 5 - *v[6] * 2); |
90 |
|
|
91 |
|
if(ABS(a30) < 8*quant) { |
92 |
|
a31 = (*v[1] * 2 - *v[2] * 5 + *v[3] * 5 - *v[4] * 2); |
93 |
|
a32 = (*v[5] * 2 - *v[6] * 5 + *v[7] * 5 - *v[8] * 2); |
94 |
|
|
95 |
|
diff = (5 * ((SIGN(a30) * MIN(ABS(a30), MIN(ABS(a31), ABS(a32)))) - a30) + 32) >> 6; |
96 |
|
limit = (*v[4] - *v[5]) / 2; |
97 |
|
|
98 |
|
if (limit > 0) |
99 |
|
diff = (diff < 0) ? 0 : ((diff > limit) ? limit : diff); |
100 |
|
else |
101 |
|
diff = (diff > 0) ? 0 : ((diff < limit) ? limit : diff); |
102 |
|
|
103 |
|
*v[4] -= diff; |
104 |
|
*v[5] += diff; |
105 |
|
} |
106 |
|
} |
107 |
|
else { /* DC-offset mode */ |
108 |
|
|
109 |
|
/* Now decide whether to apply smoothing filter or not */ |
110 |
|
max = MAX(*v[1], MAX(*v[2], MAX(*v[3], MAX(*v[4], MAX(*v[5], MAX(*v[6], MAX(*v[7], *v[8]))))))); |
111 |
|
min = MIN(*v[1], MIN(*v[2], MIN(*v[3], MIN(*v[4], MIN(*v[5], MIN(*v[6], MIN(*v[7], *v[8]))))))); |
112 |
|
|
113 |
|
if((max-min) < 2*quant) { |
114 |
|
|
115 |
|
/* Choose edge pixels */ |
116 |
|
p0 = (ABS(*v[1]-*v[0]) < quant) ? *v[0] : *v[1]; |
117 |
|
p9 = (ABS(*v[8]-*v[9]) < quant) ? *v[9] : *v[8]; |
118 |
|
|
119 |
|
*v[1] = (6*p0 + (*v[1]<<2) + (*v[2]<<1) + (*v[3]<<1) + *v[4] + *v[5] + 8) >> 4; |
120 |
|
*v[2] = ((p0<<2) + (*v[1]<<1) + (*v[2]<<2) + (*v[3]<<1) + (*v[4]<<1) + *v[5] + *v[6] + 8) >> 4; |
121 |
|
*v[3] = ((p0<<1) + (*v[1]<<1) + (*v[2]<<1) + (*v[3]<<2) + (*v[4]<<1) + (*v[5]<<1) + *v[6] + *v[7] + 8) >> 4; |
122 |
|
*v[4] = (p0 + *v[1] + (*v[2]<<1) + (*v[3]<<1) + (*v[4]<<2) + (*v[5]<<1) + (*v[6]<<1) + *v[7] + *v[8] + 8) >> 4; |
123 |
|
*v[5] = (*v[1] + *v[2] + (*v[3]<<1) + (*v[4]<<1) + (*v[5]<<2) + (*v[6]<<1) + (*v[7]<<1) + *v[8] + p9 + 8) >> 4; |
124 |
|
*v[6] = (*v[2] + *v[3] + (*v[4]<<1) + (*v[5]<<1) + (*v[6]<<2) + (*v[7]<<1) + (*v[8]<<1) + (p9<<1) + 8) >> 4; |
125 |
|
*v[7] = (*v[3] + *v[4] + (*v[5]<<1) + (*v[6]<<1) + (*v[7]<<2) + (*v[8]<<1) + (p9<<2) + 8) >> 4; |
126 |
|
*v[8] = (*v[4] + *v[5] + (*v[6]<<1) + (*v[7]<<1) + (*v[8]<<2) + 6*p9 + 8) >> 4; |
127 |
|
} |
128 |
|
} |
129 |
|
} |
130 |
|
} |
131 |
|
|
132 |
|
|
133 |
|
|
134 |
|
void deblock8x8_v(uint8_t *img, int stride, int quant) |
135 |
|
{ |
136 |
|
int i, j; |
137 |
|
int eq_cnt; |
138 |
|
uint8_t *v[10], p0, p9; |
139 |
|
int min, max; |
140 |
|
int a30, a31, a32; |
141 |
|
int diff, limit; |
142 |
|
|
143 |
|
for(j = 0; j < 8; j++) { |
144 |
|
eq_cnt = 0; |
145 |
|
|
146 |
|
/* Load pixel addresses for filtering */ |
147 |
|
|
148 |
|
for(i = 0; i < 10; i++) |
149 |
|
v[i] = img + j*stride + (i-5); |
150 |
|
|
151 |
|
/* First, decide whether to use default or DC-offset mode */ |
152 |
|
|
153 |
|
for(i = 0; i < 9; i++) |
154 |
|
{ |
155 |
|
if(ABS(*v[i] - *v[i+1]) < THR1) |
156 |
|
eq_cnt++; |
157 |
|
} |
158 |
|
|
159 |
|
if(eq_cnt < THR2) { /* Default mode */ |
160 |
|
|
161 |
|
a30 = (*v[3] * 2 - *v[4] * 5 + *v[5] * 5 - *v[6] * 2); |
162 |
|
|
163 |
|
if(ABS(a30) < 8*quant) { |
164 |
|
a31 = (*v[1] * 2 - *v[2] * 5 + *v[3] * 5 - *v[4] * 2); |
165 |
|
a32 = (*v[5] * 2 - *v[6] * 5 + *v[7] * 5 - *v[8] * 2); |
166 |
|
|
167 |
|
diff = (5 * ((SIGN(a30) * MIN(ABS(a30), MIN(ABS(a31), ABS(a32)))) - a30) + 32) >> 6; |
168 |
|
limit = (*v[4] - *v[5]) / 2; |
169 |
|
|
170 |
|
if (limit > 0) |
171 |
|
diff = (diff < 0) ? 0 : ((diff > limit) ? limit : diff); |
172 |
|
else |
173 |
|
diff = (diff > 0) ? 0 : ((diff < limit) ? limit : diff); |
174 |
|
|
175 |
|
*v[4] -= diff; |
176 |
|
*v[5] += diff; |
177 |
|
} |
178 |
|
} |
179 |
|
else { /* DC-offset mode */ |
180 |
|
|
181 |
|
/* Now decide whether to apply smoothing filter or not */ |
182 |
|
max = MAX(*v[1], MAX(*v[2], MAX(*v[3], MAX(*v[4], MAX(*v[5], MAX(*v[6], MAX(*v[7], *v[8]))))))); |
183 |
|
min = MIN(*v[1], MIN(*v[2], MIN(*v[3], MIN(*v[4], MIN(*v[5], MIN(*v[6], MIN(*v[7], *v[8]))))))); |
184 |
|
|
185 |
|
if((max-min) < 2*quant) { |
186 |
|
|
187 |
|
/* Choose edge pixels */ |
188 |
|
p0 = (ABS(*v[1]-*v[0]) < quant) ? *v[0] : *v[1]; |
189 |
|
p9 = (ABS(*v[8]-*v[9]) < quant) ? *v[9] : *v[8]; |
190 |
|
|
191 |
|
*v[1] = (6*p0 + (*v[1]<<2) + (*v[2]<<1) + (*v[3]<<1) + *v[4] + *v[5] + 8) >> 4; |
192 |
|
*v[2] = ((p0<<2) + (*v[1]<<1) + (*v[2]<<2) + (*v[3]<<1) + (*v[4]<<1) + *v[5] + *v[6] + 8) >> 4; |
193 |
|
*v[3] = ((p0<<1) + (*v[1]<<1) + (*v[2]<<1) + (*v[3]<<2) + (*v[4]<<1) + (*v[5]<<1) + *v[6] + *v[7] + 8) >> 4; |
194 |
|
*v[4] = (p0 + *v[1] + (*v[2]<<1) + (*v[3]<<1) + (*v[4]<<2) + (*v[5]<<1) + (*v[6]<<1) + *v[7] + *v[8] + 8) >> 4; |
195 |
|
*v[5] = (*v[1] + *v[2] + (*v[3]<<1) + (*v[4]<<1) + (*v[5]<<2) + (*v[6]<<1) + (*v[7]<<1) + *v[8] + p9 + 8) >> 4; |
196 |
|
*v[6] = (*v[2] + *v[3] + (*v[4]<<1) + (*v[5]<<1) + (*v[6]<<2) + (*v[7]<<1) + (*v[8]<<1) + (p9<<1) + 8) >> 4; |
197 |
|
*v[7] = (*v[3] + *v[4] + (*v[5]<<1) + (*v[6]<<1) + (*v[7]<<2) + (*v[8]<<1) + (p9<<2) + 8) >> 4; |
198 |
|
*v[8] = (*v[4] + *v[5] + (*v[6]<<1) + (*v[7]<<1) + (*v[8]<<2) + 6*p9 + 8) >> 4; |
199 |
|
} |
200 |
|
} |
201 |
|
} |
202 |
|
} |