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1 : | Isibaar | 1004 | #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 : | } |
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