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| 1 : | edgomez | 195 | /************************************************************************** |
| 2 : | * | ||
| 3 : | * XVID MPEG-4 VIDEO CODEC | ||
| 4 : | * sum of absolute difference | ||
| 5 : | * | ||
| 6 : | * This program is free software; you can redistribute it and/or modify | ||
| 7 : | * it under the terms of the GNU General Public License as published by | ||
| 8 : | * the Free Software Foundation; either version 2 of the License, or | ||
| 9 : | * (at your option) any later version. | ||
| 10 : | * | ||
| 11 : | * This program is distributed in the hope that it will be useful, | ||
| 12 : | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 14 : | * GNU General Public License for more details. | ||
| 15 : | * | ||
| 16 : | * You should have received a copy of the GNU General Public License | ||
| 17 : | * along with this program; if not, write to the Free Software | ||
| 18 : | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 19 : | * | ||
| 20 : | *************************************************************************/ | ||
| 21 : | |||
| 22 : | /************************************************************************** | ||
| 23 : | * | ||
| 24 : | * History: | ||
| 25 : | * | ||
| 26 : | * 14.02.2002 added sad16bi_c() | ||
| 27 : | * 10.11.2001 initial version; (c)2001 peter ross <pross@cs.rmit.edu.au> | ||
| 28 : | * | ||
| 29 : | *************************************************************************/ | ||
| 30 : | |||
| 31 : | |||
| 32 : | #include "../portab.h" | ||
| 33 : | #include "sad.h" | ||
| 34 : | |||
| 35 : | sad16FuncPtr sad16; | ||
| 36 : | sad8FuncPtr sad8; | ||
| 37 : | sad16biFuncPtr sad16bi; | ||
| 38 : | sad8biFuncPtr sad8bi; // not really sad16, but no difference in prototype | ||
| 39 : | dev16FuncPtr dev16; | ||
| 40 : | |||
| 41 : | sadInitFuncPtr sadInit; | ||
| 42 : | |||
| 43 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
| 44 : | |||
| 45 : | uint32_t | ||
| 46 : | sad8FuncPtr sad8; | ||
| 47 : | const uint8_t * const ref, | ||
| 48 : | |||
| 49 : | const uint32_t best_sad) | ||
| 50 : | { | ||
| 51 : | |||
| 52 : | uint32_t sad = 0; | ||
| 53 : | int32_t mean = 0; | ||
| 54 : | uint32_t i, j; | ||
| 55 : | uint8_t const *ptr_cur = cur; | ||
| 56 : | uint8_t const *ptr_ref = ref; | ||
| 57 : | |||
| 58 : | for (j = 0; j < 16; j++) { | ||
| 59 : | for (i = 0; i < 16; i++) { | ||
| 60 : | mean += ((int) *(ptr_cur + i) - (int) *(ptr_ref + i)); | ||
| 61 : | } | ||
| 62 : | ptr_cur += stride; | ||
| 63 : | ptr_ref += stride; | ||
| 64 : | |||
| 65 : | } | ||
| 66 : | mean /= 256; | ||
| 67 : | |||
| 68 : | for (j = 0; j < 16; j++) { | ||
| 69 : | |||
| 70 : | ptr_cur -= stride; | ||
| 71 : | ptr_ref -= stride; | ||
| 72 : | |||
| 73 : | for (i = 0; i < 16; i++) { | ||
| 74 : | |||
| 75 : | sad += ABS(*(ptr_cur + i) - *(ptr_ref + i) - mean); | ||
| 76 : | if (sad >= best_sad) { | ||
| 77 : | return MRSAD16_CORRFACTOR * sad; | ||
| 78 : | } | ||
| 79 : | } | ||
| 80 : | } | ||
| 81 : | |||
| 82 : | return MRSAD16_CORRFACTOR * sad; | ||
| 83 : | |||
| 84 : | } | ||
| 85 : | |||
| 86 : | |||
| 87 : | uint32_t | ||
| 88 : | sad16_c(const uint8_t * const cur, | ||
| 89 : | const uint8_t * const ref, | ||
| 90 : | const uint32_t stride, | ||
| 91 : | const uint32_t best_sad) | ||
| 92 : | { | ||
| 93 : | |||
| 94 : | uint32_t sad = 0; | ||
| 95 : | uint32_t i, j; | ||
| 96 : | uint8_t const *ptr_cur = cur; | ||
| 97 : | uint8_t const *ptr_ref = ref; | ||
| 98 : | |||
| 99 : | for (j = 0; j < 16; j++) { | ||
| 100 : | |||
| 101 : | for (i = 0; i < 16; i++) { | ||
| 102 : | |||
| 103 : | sad += ABS(*(ptr_cur + i) - *(ptr_ref + i)); | ||
| 104 : | |||
| 105 : | if (sad >= best_sad) { | ||
| 106 : | return sad; | ||
| 107 : | } | ||
| 108 : | |||
| 109 : | |||
| 110 : | } | ||
| 111 : | |||
| 112 : | ptr_cur += stride; | ||
| 113 : | ptr_ref += stride; | ||
| 114 : | |||
| 115 : | } | ||
| 116 : | |||
| 117 : | return sad; | ||
| 118 : | |||
| 119 : | } | ||
| 120 : | |||
| 121 : | |||
| 122 : | |||
| 123 : | uint32_t | ||
| 124 : | sad16bi_c(const uint8_t * const cur, | ||
| 125 : | const uint8_t * const ref1, | ||
| 126 : | const uint8_t * const ref2, | ||
| 127 : | const uint32_t stride) | ||
| 128 : | { | ||
| 129 : | |||
| 130 : | uint32_t sad = 0; | ||
| 131 : | uint32_t i, j; | ||
| 132 : | uint8_t const *ptr_cur = cur; | ||
| 133 : | uint8_t const *ptr_ref1 = ref1; | ||
| 134 : | uint8_t const *ptr_ref2 = ref2; | ||
| 135 : | |||
| 136 : | for (j = 0; j < 16; j++) { | ||
| 137 : | |||
| 138 : | for (i = 0; i < 16; i++) { | ||
| 139 : | int pixel = (ptr_ref1[i] + ptr_ref2[i] + 1) / 2; | ||
| 140 : | |||
| 141 : | if (pixel < 0) { | ||
| 142 : | pixel = 0; | ||
| 143 : | } else if (pixel > 255) { | ||
| 144 : | pixel = 255; | ||
| 145 : | } | ||
| 146 : | |||
| 147 : | sad += ABS(ptr_cur[i] - pixel); | ||
| 148 : | } | ||
| 149 : | |||
| 150 : | ptr_cur += stride; | ||
| 151 : | ptr_ref1 += stride; | ||
| 152 : | ptr_ref2 += stride; | ||
| 153 : | |||
| 154 : | } | ||
| 155 : | |||
| 156 : | return sad; | ||
| 157 : | |||
| 158 : | } | ||
| 159 : | |||
| 160 : | uint32_t | ||
| 161 : | sad8bi_c(const uint8_t * const cur, | ||
| 162 : | const uint8_t * const ref1, | ||
| 163 : | const uint8_t * const ref2, | ||
| 164 : | const uint32_t stride) | ||
| 165 : | { | ||
| 166 : | |||
| 167 : | uint32_t sad = 0; | ||
| 168 : | uint8_t const *ptr_cur = cur; | ||
| 169 : | uint8_t const *ptr_ref = ref; | ||
| 170 : | |||
| 171 : | for (j = 0; j < 8; j++) { | ||
| 172 : | |||
| 173 : | for (i = 0; i < 8; i++) { | ||
| 174 : | sad += ABS(*(ptr_cur + i) - *(ptr_ref + i)); | ||
| 175 : | } | ||
| 176 : | |||
| 177 : | ptr_cur += stride; | ||
| 178 : | ptr_ref += stride; | ||
| 179 : | |||
| 180 : | } | ||
| 181 : | |||
| 182 : | return sad; | ||
| 183 : | } | ||
| 184 : | |||
| 185 : | |||
| 186 : | |||
| 187 : | |||
| 188 : | /* average deviation from mean */ | ||
| 189 : | |||
| 190 : | uint32_t | ||
| 191 : | dev16_c(const uint8_t * const cur, | ||
| 192 : | const uint32_t stride) | ||
| 193 : | { | ||
| 194 : | |||
| 195 : | uint32_t mean = 0; | ||
| 196 : | uint32_t dev = 0; | ||
| 197 : | uint32_t i, j; | ||
| 198 : | uint8_t const *ptr_cur = cur; | ||
| 199 : | |||
| 200 : | for (j = 0; j < 16; j++) { | ||
| 201 : | |||
| 202 : | for (i = 0; i < 16; i++) | ||
| 203 : | mean += *(ptr_cur + i); | ||
| 204 : | |||
| 205 : | ptr_cur += stride; | ||
| 206 : | |||
| 207 : | } | ||
| 208 : | |||
| 209 : | mean /= (16 * 16); | ||
| 210 : | ptr_cur = cur; | ||
| 211 : | |||
| 212 : | for (j = 0; j < 16; j++) { | ||
| 213 : | |||
| 214 : | for (i = 0; i < 16; i++) | ||
| 215 : | dev += ABS(*(ptr_cur + i) - (int32_t) mean); | ||
| 216 : | |||
| 217 : | ptr_cur += stride; | ||
| 218 : | |||
| 219 : | } | ||
| 220 : | |||
| 221 : | return dev; | ||
| 222 : | } |
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