1 /* 2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 #ifndef VP9_COMMON_VP9_MVREF_COMMON_H_ 11 #define VP9_COMMON_VP9_MVREF_COMMON_H_ 12 13 #include "vp9/common/vp9_onyxc_int.h" 14 #include "vp9/common/vp9_blockd.h" 15 16 #ifdef __cplusplus 17 extern "C" { 18 #endif 19 20 #define LEFT_TOP_MARGIN ((VP9_ENC_BORDER_IN_PIXELS - VP9_INTERP_EXTEND) << 3) 21 #define RIGHT_BOTTOM_MARGIN \ 22 ((VP9_ENC_BORDER_IN_PIXELS - VP9_INTERP_EXTEND) << 3) 23 24 #define MVREF_NEIGHBOURS 8 25 26 typedef struct position { 27 int row; 28 int col; 29 } POSITION; 30 31 typedef enum { 32 BOTH_ZERO = 0, 33 ZERO_PLUS_PREDICTED = 1, 34 BOTH_PREDICTED = 2, 35 NEW_PLUS_NON_INTRA = 3, 36 BOTH_NEW = 4, 37 INTRA_PLUS_NON_INTRA = 5, 38 BOTH_INTRA = 6, 39 INVALID_CASE = 9 40 } motion_vector_context; 41 42 // This is used to figure out a context for the ref blocks. The code flattens 43 // an array that would have 3 possible counts (0, 1 & 2) for 3 choices by 44 // adding 9 for each intra block, 3 for each zero mv and 1 for each new 45 // motion vector. This single number is then converted into a context 46 // with a single lookup ( counter_to_context ). 47 static const int mode_2_counter[MB_MODE_COUNT] = { 48 9, // DC_PRED 49 9, // V_PRED 50 9, // H_PRED 51 9, // D45_PRED 52 9, // D135_PRED 53 9, // D117_PRED 54 9, // D153_PRED 55 9, // D207_PRED 56 9, // D63_PRED 57 9, // TM_PRED 58 0, // NEARESTMV 59 0, // NEARMV 60 3, // ZEROMV 61 1, // NEWMV 62 }; 63 64 // There are 3^3 different combinations of 3 counts that can be either 0,1 or 65 // 2. However the actual count can never be greater than 2 so the highest 66 // counter we need is 18. 9 is an invalid counter that's never used. 67 static const int counter_to_context[19] = { 68 BOTH_PREDICTED, // 0 69 NEW_PLUS_NON_INTRA, // 1 70 BOTH_NEW, // 2 71 ZERO_PLUS_PREDICTED, // 3 72 NEW_PLUS_NON_INTRA, // 4 73 INVALID_CASE, // 5 74 BOTH_ZERO, // 6 75 INVALID_CASE, // 7 76 INVALID_CASE, // 8 77 INTRA_PLUS_NON_INTRA, // 9 78 INTRA_PLUS_NON_INTRA, // 10 79 INVALID_CASE, // 11 80 INTRA_PLUS_NON_INTRA, // 12 81 INVALID_CASE, // 13 82 INVALID_CASE, // 14 83 INVALID_CASE, // 15 84 INVALID_CASE, // 16 85 INVALID_CASE, // 17 86 BOTH_INTRA // 18 87 }; 88 89 static const POSITION mv_ref_blocks[BLOCK_SIZES][MVREF_NEIGHBOURS] = { 90 // 4X4 91 { { -1, 0 }, 92 { 0, -1 }, 93 { -1, -1 }, 94 { -2, 0 }, 95 { 0, -2 }, 96 { -2, -1 }, 97 { -1, -2 }, 98 { -2, -2 } }, 99 // 4X8 100 { { -1, 0 }, 101 { 0, -1 }, 102 { -1, -1 }, 103 { -2, 0 }, 104 { 0, -2 }, 105 { -2, -1 }, 106 { -1, -2 }, 107 { -2, -2 } }, 108 // 8X4 109 { { -1, 0 }, 110 { 0, -1 }, 111 { -1, -1 }, 112 { -2, 0 }, 113 { 0, -2 }, 114 { -2, -1 }, 115 { -1, -2 }, 116 { -2, -2 } }, 117 // 8X8 118 { { -1, 0 }, 119 { 0, -1 }, 120 { -1, -1 }, 121 { -2, 0 }, 122 { 0, -2 }, 123 { -2, -1 }, 124 { -1, -2 }, 125 { -2, -2 } }, 126 // 8X16 127 { { 0, -1 }, 128 { -1, 0 }, 129 { 1, -1 }, 130 { -1, -1 }, 131 { 0, -2 }, 132 { -2, 0 }, 133 { -2, -1 }, 134 { -1, -2 } }, 135 // 16X8 136 { { -1, 0 }, 137 { 0, -1 }, 138 { -1, 1 }, 139 { -1, -1 }, 140 { -2, 0 }, 141 { 0, -2 }, 142 { -1, -2 }, 143 { -2, -1 } }, 144 // 16X16 145 { { -1, 0 }, 146 { 0, -1 }, 147 { -1, 1 }, 148 { 1, -1 }, 149 { -1, -1 }, 150 { -3, 0 }, 151 { 0, -3 }, 152 { -3, -3 } }, 153 // 16X32 154 { { 0, -1 }, 155 { -1, 0 }, 156 { 2, -1 }, 157 { -1, -1 }, 158 { -1, 1 }, 159 { 0, -3 }, 160 { -3, 0 }, 161 { -3, -3 } }, 162 // 32X16 163 { { -1, 0 }, 164 { 0, -1 }, 165 { -1, 2 }, 166 { -1, -1 }, 167 { 1, -1 }, 168 { -3, 0 }, 169 { 0, -3 }, 170 { -3, -3 } }, 171 // 32X32 172 { { -1, 1 }, 173 { 1, -1 }, 174 { -1, 2 }, 175 { 2, -1 }, 176 { -1, -1 }, 177 { -3, 0 }, 178 { 0, -3 }, 179 { -3, -3 } }, 180 // 32X64 181 { { 0, -1 }, 182 { -1, 0 }, 183 { 4, -1 }, 184 { -1, 2 }, 185 { -1, -1 }, 186 { 0, -3 }, 187 { -3, 0 }, 188 { 2, -1 } }, 189 // 64X32 190 { { -1, 0 }, 191 { 0, -1 }, 192 { -1, 4 }, 193 { 2, -1 }, 194 { -1, -1 }, 195 { -3, 0 }, 196 { 0, -3 }, 197 { -1, 2 } }, 198 // 64X64 199 { { -1, 3 }, 200 { 3, -1 }, 201 { -1, 4 }, 202 { 4, -1 }, 203 { -1, -1 }, 204 { -1, 0 }, 205 { 0, -1 }, 206 { -1, 6 } } 207 }; 208 209 static const int idx_n_column_to_subblock[4][2] = { 210 { 1, 2 }, { 1, 3 }, { 3, 2 }, { 3, 3 } 211 }; 212 213 // clamp_mv_ref 214 #define MV_BORDER (16 << 3) // Allow 16 pels in 1/8th pel units 215 216 static INLINE void clamp_mv_ref(MV *mv, const MACROBLOCKD *xd) { 217 clamp_mv(mv, xd->mb_to_left_edge - MV_BORDER, 218 xd->mb_to_right_edge + MV_BORDER, xd->mb_to_top_edge - MV_BORDER, 219 xd->mb_to_bottom_edge + MV_BORDER); 220 } 221 222 // This function returns either the appropriate sub block or block's mv 223 // on whether the block_size < 8x8 and we have check_sub_blocks set. 224 static INLINE int_mv get_sub_block_mv(const MODE_INFO *candidate, int which_mv, 225 int search_col, int block_idx) { 226 return block_idx >= 0 && candidate->sb_type < BLOCK_8X8 227 ? candidate 228 ->bmi[idx_n_column_to_subblock[block_idx][search_col == 0]] 229 .as_mv[which_mv] 230 : candidate->mv[which_mv]; 231 } 232 233 // Performs mv sign inversion if indicated by the reference frame combination. 234 static INLINE int_mv scale_mv(const MODE_INFO *mi, int ref, 235 const MV_REFERENCE_FRAME this_ref_frame, 236 const int *ref_sign_bias) { 237 int_mv mv = mi->mv[ref]; 238 if (ref_sign_bias[mi->ref_frame[ref]] != ref_sign_bias[this_ref_frame]) { 239 mv.as_mv.row *= -1; 240 mv.as_mv.col *= -1; 241 } 242 return mv; 243 } 244 245 // This macro is used to add a motion vector mv_ref list if it isn't 246 // already in the list. If it's the second motion vector it will also 247 // skip all additional processing and jump to Done! 248 #define ADD_MV_REF_LIST(mv, refmv_count, mv_ref_list, Done) \ 249 do { \ 250 if (refmv_count) { \ 251 if ((mv).as_int != (mv_ref_list)[0].as_int) { \ 252 (mv_ref_list)[(refmv_count)] = (mv); \ 253 goto Done; \ 254 } \ 255 } else { \ 256 (mv_ref_list)[(refmv_count)++] = (mv); \ 257 } \ 258 } while (0) 259 260 // If either reference frame is different, not INTRA, and they 261 // are different from each other scale and add the mv to our list. 262 #define IF_DIFF_REF_FRAME_ADD_MV(mbmi, ref_frame, ref_sign_bias, refmv_count, \ 263 mv_ref_list, Done) \ 264 do { \ 265 if (is_inter_block(mbmi)) { \ 266 if ((mbmi)->ref_frame[0] != ref_frame) \ 267 ADD_MV_REF_LIST(scale_mv((mbmi), 0, ref_frame, ref_sign_bias), \ 268 refmv_count, mv_ref_list, Done); \ 269 if (has_second_ref(mbmi) && (mbmi)->ref_frame[1] != ref_frame && \ 270 (mbmi)->mv[1].as_int != (mbmi)->mv[0].as_int) \ 271 ADD_MV_REF_LIST(scale_mv((mbmi), 1, ref_frame, ref_sign_bias), \ 272 refmv_count, mv_ref_list, Done); \ 273 } \ 274 } while (0) 275 276 // Checks that the given mi_row, mi_col and search point 277 // are inside the borders of the tile. 278 static INLINE int is_inside(const TileInfo *const tile, int mi_col, int mi_row, 279 int mi_rows, const POSITION *mi_pos) { 280 return !(mi_row + mi_pos->row < 0 || 281 mi_col + mi_pos->col < tile->mi_col_start || 282 mi_row + mi_pos->row >= mi_rows || 283 mi_col + mi_pos->col >= tile->mi_col_end); 284 } 285 286 // TODO(jingning): this mv clamping function should be block size dependent. 287 static INLINE void clamp_mv2(MV *mv, const MACROBLOCKD *xd) { 288 clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN, 289 xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN, 290 xd->mb_to_top_edge - LEFT_TOP_MARGIN, 291 xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN); 292 } 293 294 static INLINE void lower_mv_precision(MV *mv, int allow_hp) { 295 const int use_hp = allow_hp && use_mv_hp(mv); 296 if (!use_hp) { 297 if (mv->row & 1) mv->row += (mv->row > 0 ? -1 : 1); 298 if (mv->col & 1) mv->col += (mv->col > 0 ? -1 : 1); 299 } 300 } 301 302 typedef void (*find_mv_refs_sync)(void *const data, int mi_row); 303 void vp9_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd, 304 MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame, 305 int_mv *mv_ref_list, int mi_row, int mi_col, 306 uint8_t *mode_context); 307 308 // check a list of motion vectors by sad score using a number rows of pixels 309 // above and a number cols of pixels in the left to select the one with best 310 // score to use as ref motion vector 311 void vp9_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp, int_mv *mvlist, 312 int_mv *nearest_mv, int_mv *near_mv); 313 314 void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd, int block, 315 int ref, int mi_row, int mi_col, 316 int_mv *nearest_mv, int_mv *near_mv, 317 uint8_t *mode_context); 318 319 #ifdef __cplusplus 320 } // extern "C" 321 #endif 322 323 #endif // VP9_COMMON_VP9_MVREF_COMMON_H_ 324
