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| 1 : | Isibaar | 1251 | /***************************************************************************** |
| 2 : | * | ||
| 3 : | * XVID MPEG-4 VIDEO CODEC | ||
| 4 : | * - Postprocessing functions - | ||
| 5 : | * | ||
| 6 : | * Copyright(C) 2003 Michael Militzer <isibaar@xvid.org> | ||
| 7 : | * | ||
| 8 : | * This program is free software ; you can redistribute it and/or modify | ||
| 9 : | * it under the terms of the GNU General Public License as published by | ||
| 10 : | * the Free Software Foundation ; either version 2 of the License, or | ||
| 11 : | * (at your option) any later version. | ||
| 12 : | * | ||
| 13 : | * This program is distributed in the hope that it will be useful, | ||
| 14 : | * but WITHOUT ANY WARRANTY ; without even the implied warranty of | ||
| 15 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 16 : | * GNU General Public License for more details. | ||
| 17 : | * | ||
| 18 : | * You should have received a copy of the GNU General Public License | ||
| 19 : | * along with this program ; if not, write to the Free Software | ||
| 20 : | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| 21 : | * | ||
| 22 : | ****************************************************************************/ | ||
| 23 : | |||
| 24 : | #include <stdlib.h> | ||
| 25 : | #include <string.h> | ||
| 26 : | #include <math.h> | ||
| 27 : | |||
| 28 : | #include "../portab.h" | ||
| 29 : | #include "../global.h" | ||
| 30 : | #include "image.h" | ||
| 31 : | #include "postprocessing.h" | ||
| 32 : | |||
| 33 : | /* Filtering thresholds */ | ||
| 34 : | |||
| 35 : | #define THR1 2 | ||
| 36 : | #define THR2 6 | ||
| 37 : | |||
| 38 : | /* Some useful (and fast) macros | ||
| 39 : | Note that the MIN/MAX macros assume signed shift - if your compiler | ||
| 40 : | doesn't do signed shifts, use the default MIN/MAX macros from global.h */ | ||
| 41 : | |||
| 42 : | #define FAST_MAX(x,y) ((x) - ((((x) - (y))>>(32 - 1)) & ((x) - (y)))) | ||
| 43 : | #define FAST_MIN(x,y) ((x) + ((((y) - (x))>>(32 - 1)) & ((y) - (x)))) | ||
| 44 : | #define FAST_ABS(x) ((((int)(x)) >> 31) ^ ((int)(x))) - (((int)(x)) >> 31) | ||
| 45 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
| 46 : | |||
| 47 : | static int8_t xvid_thresh_tbl[510]; | ||
| 48 : | static int8_t xvid_abs_tbl[510]; | ||
| 49 : | |||
| 50 : | void init_postproc(void) | ||
| 51 : | { | ||
| 52 : | int i; | ||
| 53 : | |||
| 54 : | for(i = -255; i < 256; i++) { | ||
| 55 : | xvid_thresh_tbl[i + 255] = 0; | ||
| 56 : | if(ABS(i) < THR1) | ||
| 57 : | xvid_thresh_tbl[i + 255] = 1; | ||
| 58 : | xvid_abs_tbl[i + 255] = ABS(i); | ||
| 59 : | } | ||
| 60 : | } | ||
| 61 : | |||
| 62 : | void | ||
| 63 : | image_deblock(IMAGE * img, int edged_width, | ||
| 64 : | const MACROBLOCK * mbs, int mb_width, int mb_height, int mb_stride, | ||
| 65 : | int flags) | ||
| 66 : | { | ||
| 67 : | const int edged_width2 = edged_width /2; | ||
| 68 : | int i,j; | ||
| 69 : | int quant; | ||
| 70 : | |||
| 71 : | /* luma: j,i in block units */ | ||
| 72 : | if ((flags & XVID_DEBLOCKY)) | ||
| 73 : | { | ||
| 74 : | for (j = 1; j < mb_height*2; j++) /* horizontal deblocking */ | ||
| 75 : | for (i = 0; i < mb_width*2; i++) | ||
| 76 : | { | ||
| 77 : | quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; | ||
| 78 : | deblock8x8_h(img->y + j*8*edged_width + i*8, edged_width, quant); | ||
| 79 : | } | ||
| 80 : | |||
| 81 : | for (j = 0; j < mb_height*2; j++) /* vertical deblocking */ | ||
| 82 : | for (i = 1; i < mb_width*2; i++) | ||
| 83 : | { | ||
| 84 : | quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; | ||
| 85 : | deblock8x8_v(img->y + j*8*edged_width + i*8, edged_width, quant); | ||
| 86 : | } | ||
| 87 : | } | ||
| 88 : | |||
| 89 : | |||
| 90 : | /* chroma */ | ||
| 91 : | if ((flags & XVID_DEBLOCKUV)) | ||
| 92 : | { | ||
| 93 : | for (j = 1; j < mb_height; j++) /* horizontal deblocking */ | ||
| 94 : | for (i = 0; i < mb_width; i++) | ||
| 95 : | { | ||
| 96 : | quant = mbs[(j+0)*mb_stride + i].quant; | ||
| 97 : | deblock8x8_h(img->u + j*8*edged_width2 + i*8, edged_width2, quant); | ||
| 98 : | deblock8x8_h(img->v + j*8*edged_width2 + i*8, edged_width2, quant); | ||
| 99 : | } | ||
| 100 : | |||
| 101 : | for (j = 0; j < mb_height; j++) /* vertical deblocking */ | ||
| 102 : | for (i = 1; i < mb_width; i++) | ||
| 103 : | { | ||
| 104 : | quant = mbs[(j+0)*mb_stride + i].quant; | ||
| 105 : | deblock8x8_v(img->u + j*8*edged_width2 + i*8, edged_width2, quant); | ||
| 106 : | deblock8x8_v(img->v + j*8*edged_width2 + i*8, edged_width2, quant); | ||
| 107 : | } | ||
| 108 : | } | ||
| 109 : | } | ||
| 110 : | |||
| 111 : | #define LOAD_DATA_HOR(x) \ | ||
| 112 : | /* Load pixel addresses and data for filtering */ \ | ||
| 113 : | s[0] = *(v[0] = img - 5*stride + x); \ | ||
| 114 : | s[1] = *(v[1] = img - 4*stride + x); \ | ||
| 115 : | s[2] = *(v[2] = img - 3*stride + x); \ | ||
| 116 : | s[3] = *(v[3] = img - 2*stride + x); \ | ||
| 117 : | s[4] = *(v[4] = img - 1*stride + x); \ | ||
| 118 : | s[5] = *(v[5] = img + 0*stride + x); \ | ||
| 119 : | s[6] = *(v[6] = img + 1*stride + x); \ | ||
| 120 : | s[7] = *(v[7] = img + 2*stride + x); \ | ||
| 121 : | s[8] = *(v[8] = img + 3*stride + x); \ | ||
| 122 : | s[9] = *(v[9] = img + 4*stride + x); | ||
| 123 : | |||
| 124 : | #define LOAD_DATA_VER(x) \ | ||
| 125 : | /* Load pixel addresses and data for filtering */ \ | ||
| 126 : | s[0] = *(v[0] = img + x*stride - 5); \ | ||
| 127 : | s[1] = *(v[1] = img + x*stride - 4); \ | ||
| 128 : | s[2] = *(v[2] = img + x*stride - 3); \ | ||
| 129 : | s[3] = *(v[3] = img + x*stride - 2); \ | ||
| 130 : | s[4] = *(v[4] = img + x*stride - 1); \ | ||
| 131 : | s[5] = *(v[5] = img + x*stride + 0); \ | ||
| 132 : | s[6] = *(v[6] = img + x*stride + 1); \ | ||
| 133 : | s[7] = *(v[7] = img + x*stride + 2); \ | ||
| 134 : | s[8] = *(v[8] = img + x*stride + 3); \ | ||
| 135 : | s[9] = *(v[9] = img + x*stride + 4); | ||
| 136 : | |||
| 137 : | #define APPLY_FILTER_CORE \ | ||
| 138 : | /* First, decide whether to use default or DC-offset mode */ \ | ||
| 139 : | \ | ||
| 140 : | eq_cnt = 0; \ | ||
| 141 : | \ | ||
| 142 : | eq_cnt += xvid_thresh_tbl[s[0] - s[1] + 255]; \ | ||
| 143 : | eq_cnt += xvid_thresh_tbl[s[1] - s[2] + 255]; \ | ||
| 144 : | eq_cnt += xvid_thresh_tbl[s[2] - s[3] + 255]; \ | ||
| 145 : | eq_cnt += xvid_thresh_tbl[s[3] - s[4] + 255]; \ | ||
| 146 : | eq_cnt += xvid_thresh_tbl[s[4] - s[5] + 255]; \ | ||
| 147 : | eq_cnt += xvid_thresh_tbl[s[5] - s[6] + 255]; \ | ||
| 148 : | eq_cnt += xvid_thresh_tbl[s[6] - s[7] + 255]; \ | ||
| 149 : | eq_cnt += xvid_thresh_tbl[s[7] - s[8] + 255]; \ | ||
| 150 : | \ | ||
| 151 : | if(eq_cnt < THR2) { /* Default mode */ \ | ||
| 152 : | int a30, a31, a32; \ | ||
| 153 : | int diff, limit; \ | ||
| 154 : | \ | ||
| 155 : | a30 = ((s[3]<<1) - s[4] * 5 + s[5] * 5 - (s[6]<<1)); \ | ||
| 156 : | \ | ||
| 157 : | if(xvid_abs_tbl[a30 + 255] < 8*quant) { \ | ||
| 158 : | a31 = ((s[1]<<1) - s[2] * 5 + s[3] * 5 - (s[4]<<1)); \ | ||
| 159 : | a32 = ((s[5]<<1) - s[6] * 5 + s[7] * 5 - (s[8]<<1)); \ | ||
| 160 : | \ | ||
| 161 : | diff = (5 * ((SIGN(a30) * MIN(xvid_abs_tbl[a30 + 255], MIN(xvid_abs_tbl[a31 + 255], xvid_abs_tbl[a32 + 255]))) - a30) + 32) >> 6; \ | ||
| 162 : | limit = (s[4] - s[5]) / 2; \ | ||
| 163 : | \ | ||
| 164 : | if (limit > 0) \ | ||
| 165 : | diff = (diff < 0) ? 0 : ((diff > limit) ? limit : diff); \ | ||
| 166 : | else \ | ||
| 167 : | diff = (diff > 0) ? 0 : ((diff < limit) ? limit : diff); \ | ||
| 168 : | \ | ||
| 169 : | *v[4] -= diff; \ | ||
| 170 : | *v[5] += diff; \ | ||
| 171 : | } \ | ||
| 172 : | } \ | ||
| 173 : | else { /* DC-offset mode */ \ | ||
| 174 : | uint8_t p0, p9; \ | ||
| 175 : | int min, max; \ | ||
| 176 : | \ | ||
| 177 : | /* Now decide whether to apply smoothing filter or not */ \ | ||
| 178 : | max = FAST_MAX(s[1], FAST_MAX(s[2], FAST_MAX(s[3], FAST_MAX(s[4], FAST_MAX(s[5], FAST_MAX(s[6], FAST_MAX(s[7], s[8]))))))); \ | ||
| 179 : | min = FAST_MIN(s[1], FAST_MIN(s[2], FAST_MIN(s[3], FAST_MIN(s[4], FAST_MIN(s[5], FAST_MIN(s[6], FAST_MIN(s[7], s[8]))))))); \ | ||
| 180 : | \ | ||
| 181 : | if(((max-min)) < 2*quant) { \ | ||
| 182 : | \ | ||
| 183 : | /* Choose edge pixels */ \ | ||
| 184 : | p0 = (xvid_abs_tbl[(s[1] - s[0]) + 255] < quant) ? s[0] : s[1]; \ | ||
| 185 : | p9 = (xvid_abs_tbl[(s[8] - s[9]) + 255] < quant) ? s[9] : s[8]; \ | ||
| 186 : | \ | ||
| 187 : | *v[1] = (uint8_t) ((6*p0 + (s[1]<<2) + (s[2]<<1) + (s[3]<<1) + s[4] + s[5] + 8) >> 4); \ | ||
| 188 : | *v[2] = (uint8_t) (((p0<<2) + (s[1]<<1) + (s[2]<<2) + (s[3]<<1) + (s[4]<<1) + s[5] + s[6] + 8) >> 4); \ | ||
| 189 : | *v[3] = (uint8_t) (((p0<<1) + (s[1]<<1) + (s[2]<<1) + (s[3]<<2) + (s[4]<<1) + (s[5]<<1) + s[6] + s[7] + 8) >> 4); \ | ||
| 190 : | *v[4] = (uint8_t) ((p0 + s[1] + (s[2]<<1) + (s[3]<<1) + (s[4]<<2) + (s[5]<<1) + (s[6]<<1) + s[7] + s[8] + 8) >> 4); \ | ||
| 191 : | *v[5] = (uint8_t) ((s[1] + s[2] + (s[3]<<1) + (s[4]<<1) + (s[5]<<2) + (s[6]<<1) + (s[7]<<1) + s[8] + p9 + 8) >> 4); \ | ||
| 192 : | *v[6] = (uint8_t) ((s[2] + s[3] + (s[4]<<1) + (s[5]<<1) + (s[6]<<2) + (s[7]<<1) + (s[8]<<1) + (p9<<1) + 8) >> 4); \ | ||
| 193 : | *v[7] = (uint8_t) ((s[3] + s[4] + (s[5]<<1) + (s[6]<<1) + (s[7]<<2) + (s[8]<<1) + (p9<<2) + 8) >> 4); \ | ||
| 194 : | *v[8] = (uint8_t) ((s[4] + s[5] + (s[6]<<1) + (s[7]<<1) + (s[8]<<2) + 6*p9 + 8) >> 4); \ | ||
| 195 : | } \ | ||
| 196 : | } | ||
| 197 : | |||
| 198 : | void deblock8x8_h(uint8_t *img, int stride, int quant) | ||
| 199 : | { | ||
| 200 : | int eq_cnt; | ||
| 201 : | uint8_t *v[10]; | ||
| 202 : | int32_t s[10]; | ||
| 203 : | |||
| 204 : | LOAD_DATA_HOR(0) | ||
| 205 : | APPLY_FILTER_CORE | ||
| 206 : | |||
| 207 : | LOAD_DATA_HOR(1) | ||
| 208 : | APPLY_FILTER_CORE | ||
| 209 : | |||
| 210 : | LOAD_DATA_HOR(2) | ||
| 211 : | APPLY_FILTER_CORE | ||
| 212 : | |||
| 213 : | LOAD_DATA_HOR(3) | ||
| 214 : | APPLY_FILTER_CORE | ||
| 215 : | |||
| 216 : | LOAD_DATA_HOR(4) | ||
| 217 : | APPLY_FILTER_CORE | ||
| 218 : | |||
| 219 : | LOAD_DATA_HOR(5) | ||
| 220 : | APPLY_FILTER_CORE | ||
| 221 : | |||
| 222 : | LOAD_DATA_HOR(6) | ||
| 223 : | APPLY_FILTER_CORE | ||
| 224 : | |||
| 225 : | LOAD_DATA_HOR(7) | ||
| 226 : | APPLY_FILTER_CORE | ||
| 227 : | } | ||
| 228 : | |||
| 229 : | |||
| 230 : | void deblock8x8_v(uint8_t *img, int stride, int quant) | ||
| 231 : | { | ||
| 232 : | int eq_cnt; | ||
| 233 : | uint8_t *v[10]; | ||
| 234 : | int s[10]; | ||
| 235 : | |||
| 236 : | LOAD_DATA_VER(0) | ||
| 237 : | APPLY_FILTER_CORE | ||
| 238 : | |||
| 239 : | LOAD_DATA_VER(1) | ||
| 240 : | APPLY_FILTER_CORE | ||
| 241 : | |||
| 242 : | LOAD_DATA_VER(2) | ||
| 243 : | APPLY_FILTER_CORE | ||
| 244 : | |||
| 245 : | LOAD_DATA_VER(3) | ||
| 246 : | APPLY_FILTER_CORE | ||
| 247 : | |||
| 248 : | LOAD_DATA_VER(4) | ||
| 249 : | APPLY_FILTER_CORE | ||
| 250 : | |||
| 251 : | LOAD_DATA_VER(5) | ||
| 252 : | APPLY_FILTER_CORE | ||
| 253 : | |||
| 254 : | LOAD_DATA_VER(6) | ||
| 255 : | APPLY_FILTER_CORE | ||
| 256 : | |||
| 257 : | LOAD_DATA_VER(7) | ||
| 258 : | APPLY_FILTER_CORE | ||
| 259 : | } |
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