Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright (C) 2015 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at: |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | * |
| 17 | ***************************************************************************** |
| 18 | * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
| 19 | */ |
| 20 | /*! |
| 21 | ************************************************************************** |
| 22 | * \file ih264d_mvpred.c |
| 23 | * |
| 24 | * \brief |
| 25 | * This file contains function specific to decoding Motion vector. |
| 26 | * |
| 27 | * Detailed_description |
| 28 | * |
| 29 | * \date |
| 30 | * 10-12-2002 |
| 31 | * |
| 32 | * \author Arvind Raman |
| 33 | ************************************************************************** |
| 34 | */ |
| 35 | #include <string.h> |
| 36 | #include "ih264d_parse_cavlc.h" |
| 37 | #include "ih264d_error_handler.h" |
| 38 | #include "ih264d_structs.h" |
| 39 | #include "ih264d_defs.h" |
| 40 | #include "ih264_typedefs.h" |
| 41 | #include "ih264_macros.h" |
| 42 | #include "ih264_platform_macros.h" |
| 43 | #include "ih264d_mb_utils.h" |
| 44 | #include "ih264d_defs.h" |
| 45 | #include "ih264d_debug.h" |
| 46 | #include "ih264d_tables.h" |
| 47 | #include "ih264d_process_bslice.h" |
| 48 | #include "ih264d_mvpred.h" |
| 49 | #include "ih264d_inter_pred.h" |
| 50 | #include "ih264d_tables.h" |
| 51 | |
| 52 | /*! |
| 53 | ************************************************************************** |
| 54 | * \if ih264d_get_motion_vector_predictor name : Name \endif |
| 55 | * |
| 56 | * \brief |
| 57 | * The routine calculates the motion vector predictor for a given block, |
| 58 | * given the candidate MV predictors. |
| 59 | * |
| 60 | * \param ps_mv_pred: Candidate predictors for the current block |
| 61 | * \param ps_currMv: Pointer to the left top edge of the current block in |
| 62 | * the MV bank |
| 63 | * |
| 64 | * \return |
| 65 | * _mvPred: The x & y components of the MV predictor. |
| 66 | * |
| 67 | * \note |
| 68 | * The code implements the logic as described in sec 8.4.1.2.1. Given |
| 69 | * the candidate predictors and the pointer to the top left edge of the |
| 70 | * block in the MV bank. |
| 71 | * |
| 72 | ************************************************************************** |
| 73 | */ |
| 74 | |
| 75 | void ih264d_get_motion_vector_predictor(mv_pred_t * ps_result, |
| 76 | mv_pred_t **ps_mv_pred, |
| 77 | UWORD8 u1_ref_idx, |
| 78 | UWORD8 u1_B, |
| 79 | const UWORD8 *pu1_mv_pred_condition) |
| 80 | { |
| 81 | WORD8 c_temp; |
| 82 | UWORD8 uc_B2 = (u1_B << 1); |
| 83 | |
| 84 | /* If only one of the candidate blocks has a reference frame equal to |
| 85 | the current block then use the same block as the final predictor */ |
| 86 | c_temp = |
| 87 | (ps_mv_pred[LEFT]->i1_ref_frame[u1_B] == u1_ref_idx) |
| 88 | | ((ps_mv_pred[TOP]->i1_ref_frame[u1_B] |
| 89 | == u1_ref_idx) << 1) |
| 90 | | ((ps_mv_pred[TOP_R]->i1_ref_frame[u1_B] |
| 91 | == u1_ref_idx) << 2); |
| 92 | c_temp = pu1_mv_pred_condition[c_temp]; |
| 93 | |
| 94 | if(c_temp != -1) |
| 95 | { |
| 96 | /* Case when only when one of the cadidate block has the same |
| 97 | reference frame as the current block */ |
| 98 | ps_result->i2_mv[uc_B2 + 0] = ps_mv_pred[c_temp]->i2_mv[uc_B2 + 0]; |
| 99 | ps_result->i2_mv[uc_B2 + 1] = ps_mv_pred[c_temp]->i2_mv[uc_B2 + 1]; |
| 100 | } |
| 101 | else |
| 102 | { |
| 103 | WORD32 D0, D1; |
| 104 | D0 = MIN(ps_mv_pred[0]->i2_mv[uc_B2 + 0], |
| 105 | ps_mv_pred[1]->i2_mv[uc_B2 + 0]); |
| 106 | D1 = MAX(ps_mv_pred[0]->i2_mv[uc_B2 + 0], |
| 107 | ps_mv_pred[1]->i2_mv[uc_B2 + 0]); |
| 108 | D1 = MIN(D1, ps_mv_pred[2]->i2_mv[uc_B2 + 0]); |
| 109 | ps_result->i2_mv[uc_B2 + 0] = (WORD16)(MAX(D0, D1)); |
| 110 | |
| 111 | D0 = MIN(ps_mv_pred[0]->i2_mv[uc_B2 + 1], |
| 112 | ps_mv_pred[1]->i2_mv[uc_B2 + 1]); |
| 113 | D1 = MAX(ps_mv_pred[0]->i2_mv[uc_B2 + 1], |
| 114 | ps_mv_pred[1]->i2_mv[uc_B2 + 1]); |
| 115 | D1 = MIN(D1, ps_mv_pred[2]->i2_mv[uc_B2 + 1]); |
| 116 | ps_result->i2_mv[uc_B2 + 1] = (WORD16)(MAX(D0, D1)); |
| 117 | |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /*! |
| 122 | ************************************************************************** |
| 123 | * \if ih264d_mbaff_mv_pred name : Name \endif |
| 124 | * |
| 125 | * \brief |
| 126 | * The routine calculates the motion vector predictor for a given block, |
| 127 | * given the candidate MV predictors. |
| 128 | * |
| 129 | * \param ps_mv_pred: Candidate predictors for the current block |
| 130 | * \param ps_currMv: Pointer to the left top edge of the current block in |
| 131 | * the MV bank |
| 132 | * |
| 133 | * \return |
| 134 | * _mvPred: The x & y components of the MV predictor. |
| 135 | * |
| 136 | * \note |
| 137 | * The code implements the logic as described in sec 8.4.1.2.1. Given |
| 138 | * the candidate predictors and the pointer to the top left edge of the |
| 139 | * block in the MV bank. |
| 140 | * |
| 141 | ************************************************************************** |
| 142 | */ |
| 143 | |
| 144 | void ih264d_mbaff_mv_pred(mv_pred_t **ps_mv_pred, |
| 145 | UWORD8 u1_sub_mb_num, |
| 146 | mv_pred_t *ps_mv_nmb, |
| 147 | mv_pred_t *ps_mv_ntop, |
| 148 | dec_struct_t *ps_dec, |
| 149 | UWORD8 uc_mb_part_width, |
| 150 | dec_mb_info_t *ps_cur_mb_info, |
| 151 | UWORD8* pu0_scale) |
| 152 | { |
| 153 | UWORD16 u2_a_in = 0, u2_b_in = 0, u2_c_in = 0, u2_d_in = 0; |
| 154 | mv_pred_t *ps_mvpred_l, *ps_mvpred_tmp; |
| 155 | UWORD8 u1_sub_mb_x = (u1_sub_mb_num & 3), uc_sub_mb_y = (u1_sub_mb_num >> 2); |
| 156 | UWORD8 u1_is_cur_mb_fld, u1_is_left_mb_fld, u1_is_top_mb_fld; |
| 157 | UWORD8 u1_is_cur_mb_top; |
| 158 | |
| 159 | u1_is_cur_mb_fld = ps_cur_mb_info->u1_mb_field_decodingflag; |
| 160 | u1_is_cur_mb_top = ps_cur_mb_info->u1_topmb; |
| 161 | |
| 162 | u1_is_left_mb_fld = ps_cur_mb_info->ps_left_mb->u1_mb_fld; |
| 163 | u1_is_top_mb_fld = ps_cur_mb_info->ps_top_mb->u1_mb_fld; |
| 164 | |
| 165 | /* Checking in the subMB exists, calculating their motion vectors to be |
| 166 | used as predictors and the reference frames of those subMBs */ |
| 167 | ps_mv_pred[LEFT] = &ps_dec->s_default_mv_pred; |
| 168 | ps_mv_pred[TOP] = &(ps_dec->s_default_mv_pred); |
| 169 | ps_mv_pred[TOP_R] = &(ps_dec->s_default_mv_pred); |
| 170 | |
| 171 | /* Check if the left subMb is available */ |
| 172 | if(u1_sub_mb_x) |
| 173 | { |
| 174 | u2_a_in = 1; |
| 175 | ps_mv_pred[LEFT] = (ps_mv_nmb - 1); |
| 176 | } |
| 177 | else |
| 178 | { |
| 179 | UWORD8 uc_temp; |
| 180 | u2_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & LEFT_MB_AVAILABLE_MASK); |
| 181 | if(u2_a_in) |
| 182 | { |
| 183 | ps_mvpred_l = (ps_dec->u4_num_pmbair) ? |
| 184 | ps_mv_nmb : |
| 185 | (ps_dec->ps_mv_left + (uc_sub_mb_y << 2) + 48 |
| 186 | - (u1_is_cur_mb_top << 4)); |
| 187 | uc_temp = 29; |
| 188 | if(u1_is_cur_mb_fld ^ u1_is_left_mb_fld) |
| 189 | { |
| 190 | if(u1_is_left_mb_fld) |
| 191 | { |
| 192 | uc_temp += |
| 193 | (((uc_sub_mb_y & 1) << 2) |
| 194 | + ((uc_sub_mb_y & 2) << 1)); |
| 195 | uc_temp += ((u1_is_cur_mb_top) ? 0 : 8); |
| 196 | } |
| 197 | else |
| 198 | { |
| 199 | uc_temp = uc_temp - (uc_sub_mb_y << 2); |
| 200 | uc_temp += ((u1_is_cur_mb_top) ? 0 : 16); |
| 201 | } |
| 202 | } |
| 203 | ps_mv_pred[LEFT] = (ps_mvpred_l - uc_temp); |
| 204 | pu0_scale[LEFT] = u1_is_cur_mb_fld - u1_is_left_mb_fld; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* Check if the top subMB is available */ |
| 209 | if((uc_sub_mb_y > 0) || ((u1_is_cur_mb_top | u1_is_cur_mb_fld) == 0)) |
| 210 | { |
| 211 | u2_b_in = 1; |
| 212 | ps_mv_pred[TOP] = ps_mv_nmb - 4; |
| 213 | } |
| 214 | else |
| 215 | { |
| 216 | u2_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & TOP_MB_AVAILABLE_MASK); |
| 217 | if(u2_b_in) |
| 218 | { |
| 219 | /* CHANGED CODE */ |
| 220 | |
| 221 | if(u1_is_top_mb_fld && u1_is_cur_mb_fld) |
| 222 | ps_mvpred_tmp = ps_mv_ntop; |
| 223 | else |
| 224 | { |
| 225 | ps_mvpred_tmp = ps_mv_ntop; |
| 226 | if(u1_is_cur_mb_top) |
| 227 | ps_mvpred_tmp += 16; |
| 228 | } |
| 229 | |
| 230 | ps_mv_pred[TOP] = ps_mvpred_tmp; |
| 231 | pu0_scale[TOP] = u1_is_cur_mb_fld - u1_is_top_mb_fld; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* Check if the top right subMb is available. The top right subMb is |
| 236 | defined as the top right subMb at the top right corner of the MB |
| 237 | partition. The top right subMb index starting from the top left |
| 238 | corner of the MB partition is given by |
| 239 | TopRightSubMbIndx = TopLeftSubMbIndx + (WidthOfMbPartition - 6) / 2 |
| 240 | */ |
| 241 | u2_c_in = CHECKBIT(ps_cur_mb_info->u2_top_right_avail_mask, |
| 242 | (u1_sub_mb_num + uc_mb_part_width - 1)); |
| 243 | if(u2_c_in) |
| 244 | { |
| 245 | ps_mv_pred[TOP_R] = ps_mv_pred[TOP] + uc_mb_part_width; |
| 246 | pu0_scale[TOP_R] = pu0_scale[TOP]; |
| 247 | if((uc_sub_mb_y == 0) && ((u1_sub_mb_x + uc_mb_part_width) > 3)) |
| 248 | { |
| 249 | UWORD8 uc_isTopRtMbFld; |
| 250 | uc_isTopRtMbFld = ps_cur_mb_info->ps_top_right_mb->u1_mb_fld; |
| 251 | /* CHANGED CODE */ |
| 252 | ps_mvpred_tmp = ps_mv_ntop + uc_mb_part_width + 12; |
| 253 | ps_mvpred_tmp += (u1_is_cur_mb_top) ? 16 : 0; |
| 254 | ps_mvpred_tmp += (u1_is_cur_mb_fld && u1_is_cur_mb_top && uc_isTopRtMbFld) ? |
| 255 | 0 : 16; |
| 256 | ps_mv_pred[TOP_R] = ps_mvpred_tmp; |
| 257 | pu0_scale[TOP_R] = u1_is_cur_mb_fld - uc_isTopRtMbFld; |
| 258 | } |
| 259 | } |
| 260 | else |
| 261 | { |
| 262 | u2_d_in = CHECKBIT(ps_cur_mb_info->u2_top_left_avail_mask, u1_sub_mb_num); |
| 263 | |
| 264 | /* Check if the the top left subMB is available */ |
| 265 | if(u2_d_in) |
| 266 | { |
| 267 | UWORD8 uc_isTopLtMbFld; |
| 268 | |
| 269 | ps_mv_pred[TOP_R] = ps_mv_pred[TOP] - 1; |
| 270 | pu0_scale[TOP_R] = pu0_scale[TOP]; |
| 271 | |
| 272 | if(u1_sub_mb_x == 0) |
| 273 | { |
| 274 | if((uc_sub_mb_y > 0) || ((u1_is_cur_mb_top | u1_is_cur_mb_fld) == 0)) |
| 275 | { |
| 276 | uc_isTopLtMbFld = u1_is_left_mb_fld; |
| 277 | ps_mvpred_tmp = ps_mv_pred[LEFT] - 4; |
| 278 | |
| 279 | if((u1_is_cur_mb_fld == 0) && uc_isTopLtMbFld) |
| 280 | { |
| 281 | ps_mvpred_tmp = ps_mv_pred[LEFT] + 16; |
| 282 | ps_mvpred_tmp -= (uc_sub_mb_y & 1) ? 0 : 4; |
| 283 | } |
| 284 | } |
| 285 | else |
| 286 | { |
| 287 | UWORD32 u4_cond = ps_dec->u4_num_pmbair; |
| 288 | uc_isTopLtMbFld = ps_cur_mb_info->u1_topleft_mb_fld; |
| 289 | |
| 290 | /* CHANGED CODE */ |
| 291 | ps_mvpred_tmp = ps_mv_ntop - 29; |
| 292 | ps_mvpred_tmp += (u1_is_cur_mb_top) ? 16 : 0; |
| 293 | if(u1_is_cur_mb_fld && u1_is_cur_mb_top) |
| 294 | ps_mvpred_tmp -= (uc_isTopLtMbFld) ? 16 : 0; |
| 295 | } |
| 296 | ps_mv_pred[TOP_R] = ps_mvpred_tmp; |
| 297 | pu0_scale[TOP_R] = u1_is_cur_mb_fld - uc_isTopLtMbFld; |
| 298 | } |
| 299 | } |
| 300 | else if(u2_b_in == 0) |
| 301 | { |
| 302 | /* If all the subMBs B, C, D are all out of the frame then their MV |
| 303 | and their reference picture is equal to that of A */ |
| 304 | ps_mv_pred[TOP] = ps_mv_pred[LEFT]; |
| 305 | ps_mv_pred[TOP_R] = ps_mv_pred[LEFT]; |
| 306 | pu0_scale[TOP] = pu0_scale[LEFT]; |
| 307 | pu0_scale[TOP_R] = pu0_scale[LEFT]; |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | /*! |
| 313 | ************************************************************************** |
| 314 | * \if ih264d_non_mbaff_mv_pred name : Name \endif |
| 315 | * |
| 316 | * \brief |
| 317 | * The routine calculates the motion vector predictor for a given block, |
| 318 | * given the candidate MV predictors. |
| 319 | * |
| 320 | * \param ps_mv_pred: Candidate predictors for the current block |
| 321 | * \param ps_currMv: Pointer to the left top edge of the current block in |
| 322 | * the MV bank |
| 323 | * |
| 324 | * \return |
| 325 | * _mvPred: The x & y components of the MV predictor. |
| 326 | * |
| 327 | * \note |
| 328 | * The code implements the logic as described in sec 8.4.1.2.1. Given |
| 329 | * the candidate predictors and the pointer to the top left edge of the |
| 330 | * block in the MV bank. |
| 331 | * |
| 332 | ************************************************************************** |
| 333 | */ |
| 334 | #if(!MVPRED_NONMBAFF) |
| 335 | void ih264d_non_mbaff_mv_pred(mv_pred_t **ps_mv_pred, |
| 336 | UWORD8 u1_sub_mb_num, |
| 337 | mv_pred_t *ps_mv_nmb, |
| 338 | mv_pred_t *ps_mv_ntop, |
| 339 | dec_struct_t *ps_dec, |
| 340 | UWORD8 uc_mb_part_width, |
| 341 | dec_mb_info_t *ps_cur_mb_info) |
| 342 | { |
| 343 | UWORD16 u2_b_in = 0, u2_c_in = 0, u2_d_in = 0; |
| 344 | UWORD8 u1_sub_mb_x = (u1_sub_mb_num & 3), uc_sub_mb_y = (u1_sub_mb_num >> 2); |
| 345 | |
| 346 | /* Checking in the subMB exists, calculating their motion vectors to be |
| 347 | used as predictors and the reference frames of those subMBs */ |
| 348 | |
| 349 | ps_mv_pred[LEFT] = &ps_dec->s_default_mv_pred; |
| 350 | ps_mv_pred[TOP] = &(ps_dec->s_default_mv_pred); |
| 351 | ps_mv_pred[TOP_R] = &(ps_dec->s_default_mv_pred); |
| 352 | /* Check if the left subMb is available */ |
| 353 | |
| 354 | if(u1_sub_mb_x) |
| 355 | { |
| 356 | ps_mv_pred[LEFT] = (ps_mv_nmb - 1); |
| 357 | } |
| 358 | else |
| 359 | { |
| 360 | if(ps_cur_mb_info->u1_mb_ngbr_availablity & LEFT_MB_AVAILABLE_MASK) |
| 361 | { |
| 362 | ps_mv_pred[LEFT] = (ps_mv_nmb - 13); |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /* Check if the top subMB is available */ |
| 367 | if(uc_sub_mb_y) |
| 368 | { |
| 369 | u2_b_in = 1; |
| 370 | ps_mv_ntop = ps_mv_nmb - 4; |
| 371 | ps_mv_pred[TOP] = ps_mv_ntop; |
| 372 | |
| 373 | } |
| 374 | else |
| 375 | { |
| 376 | u2_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & TOP_MB_AVAILABLE_MASK); |
| 377 | if(u2_b_in) |
| 378 | { |
| 379 | ps_mv_pred[TOP] = ps_mv_ntop; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* Check if the top right subMb is available. The top right subMb is |
| 384 | defined as the top right subMb at the top right corner of the MB |
| 385 | partition. The top right subMb index starting from the top left |
| 386 | corner of the MB partition is given by |
| 387 | TopRightSubMbIndx = TopLeftSubMbIndx + (WidthOfMbPartition - 6) / 2 |
| 388 | */ |
| 389 | u2_c_in = CHECKBIT(ps_cur_mb_info->u2_top_right_avail_mask, |
| 390 | (u1_sub_mb_num + uc_mb_part_width - 1)); |
| 391 | if(u2_c_in) |
| 392 | { |
| 393 | ps_mv_pred[TOP_R] = (ps_mv_ntop + uc_mb_part_width); |
| 394 | |
| 395 | if(uc_sub_mb_y == 0) |
| 396 | { |
| 397 | /* CHANGED CODE */ |
| 398 | if((u1_sub_mb_x + uc_mb_part_width) > 3) |
| 399 | ps_mv_pred[TOP_R] += 12; |
| 400 | } |
| 401 | } |
| 402 | else |
| 403 | { |
| 404 | u2_d_in = CHECKBIT(ps_cur_mb_info->u2_top_left_avail_mask, u1_sub_mb_num); |
| 405 | /* Check if the the top left subMB is available */ |
| 406 | if(u2_d_in) |
| 407 | { |
| 408 | /* CHANGED CODE */ |
| 409 | ps_mv_pred[TOP_R] = (ps_mv_ntop - 1); |
| 410 | if(u1_sub_mb_x == 0) |
| 411 | { |
| 412 | if(uc_sub_mb_y) |
| 413 | { |
| 414 | ps_mv_pred[TOP_R] = (ps_mv_nmb - 17); |
| 415 | } |
| 416 | else |
| 417 | { |
| 418 | /* CHANGED CODE */ |
| 419 | ps_mv_pred[TOP_R] -= 12; |
| 420 | } |
| 421 | } |
| 422 | } |
| 423 | else if(u2_b_in == 0) |
| 424 | { |
| 425 | /* If all the subMBs B, C, D are all out of the frame then their MV |
| 426 | and their reference picture is equal to that of A */ |
| 427 | ps_mv_pred[TOP] = ps_mv_pred[LEFT]; |
| 428 | ps_mv_pred[TOP_R] = ps_mv_pred[LEFT]; |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | #endif |
| 433 | |
| 434 | /*****************************************************************************/ |
| 435 | /* */ |
| 436 | /* Function Name : ih264d_mvpred_nonmbaffB */ |
| 437 | /* */ |
| 438 | /* Description : This function calculates the motion vector predictor, */ |
| 439 | /* for B-Slices */ |
| 440 | /* Inputs : <What inputs does the function take?> */ |
| 441 | /* Globals : None */ |
| 442 | /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| 443 | /* and based on the type of Mb the prediction is */ |
| 444 | /* appropriately done */ |
| 445 | /* Outputs : populates ps_mv_final_pred structure */ |
| 446 | /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| 447 | /* decodeSpatialdirect() */ |
| 448 | /* */ |
| 449 | /* Issues : <List any issues or problems with this function> */ |
| 450 | /* */ |
| 451 | /* Revision History: */ |
| 452 | /* */ |
| 453 | /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| 454 | /* 03 05 2005 TA First Draft */ |
| 455 | /* */ |
| 456 | /*****************************************************************************/ |
| 457 | #if(!MVPRED_NONMBAFF) |
| 458 | UWORD8 ih264d_mvpred_nonmbaffB(dec_struct_t *ps_dec, |
| 459 | dec_mb_info_t *ps_cur_mb_info, |
| 460 | mv_pred_t *ps_mv_nmb, |
| 461 | mv_pred_t *ps_mv_ntop, |
| 462 | mv_pred_t *ps_mv_final_pred, |
| 463 | UWORD8 u1_sub_mb_num, |
| 464 | UWORD8 uc_mb_part_width, |
| 465 | UWORD8 u1_lx_start, |
| 466 | UWORD8 u1_lxend, |
| 467 | UWORD8 u1_mb_mc_mode) |
| 468 | { |
| 469 | UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| 470 | mv_pred_t *ps_mv_pred[3]; |
| 471 | UWORD8 uc_B2, uc_lx, u1_ref_idx; |
| 472 | UWORD8 u1_direct_zero_pred_flag = 0; |
| 473 | |
| 474 | ih264d_non_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, |
| 475 | ps_dec, uc_mb_part_width, ps_cur_mb_info); |
| 476 | |
| 477 | for(uc_lx = u1_lx_start; uc_lx < u1_lxend; uc_lx++) |
| 478 | { |
| 479 | u1_ref_idx = ps_mv_final_pred->i1_ref_frame[uc_lx]; |
| 480 | uc_B2 = (uc_lx << 1); |
| 481 | switch(u1_mb_mc_mode) |
| 482 | { |
| 483 | case PRED_16x8: |
| 484 | /* Directional prediction for a 16x8 MB partition */ |
| 485 | if(u1_sub_mb_num == 0) |
| 486 | { |
| 487 | /* Calculating the MV pred for the top 16x8 block */ |
| 488 | if(ps_mv_pred[TOP]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 489 | { |
| 490 | /* If the reference frame used by the top subMB is same as the |
| 491 | reference frame used by the current block then MV predictor to |
| 492 | be used for the current block is same as the MV of the top |
| 493 | subMB */ |
| 494 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 495 | ps_mv_pred[TOP]->i2_mv[uc_B2 + 0]; |
| 496 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 497 | ps_mv_pred[TOP]->i2_mv[uc_B2 + 1]; |
| 498 | } |
| 499 | else |
| 500 | { |
| 501 | /* The MV predictor is calculated according to the process |
| 502 | defined in 8.4.1.2.1 */ |
| 503 | ih264d_get_motion_vector_predictor( |
| 504 | ps_mv_final_pred, |
| 505 | ps_mv_pred, |
| 506 | u1_ref_idx, |
| 507 | uc_lx, |
| 508 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 509 | } |
| 510 | } |
| 511 | else |
| 512 | { |
| 513 | if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 514 | { |
| 515 | /* If the reference frame used by the left subMB is same as the |
| 516 | reference frame used by the current block then MV predictor to |
| 517 | be used for the current block is same as the MV of the left |
| 518 | subMB */ |
| 519 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 520 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| 521 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 522 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| 523 | } |
| 524 | else |
| 525 | { |
| 526 | /* The MV predictor is calculated according to the process |
| 527 | defined in 8.4.1.2.1 */ |
| 528 | ih264d_get_motion_vector_predictor( |
| 529 | ps_mv_final_pred, |
| 530 | ps_mv_pred, |
| 531 | u1_ref_idx, |
| 532 | uc_lx, |
| 533 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 534 | } |
| 535 | } |
| 536 | break; |
| 537 | case PRED_8x16: |
| 538 | /* Directional prediction for a 8x16 MB partition */ |
| 539 | if(u1_sub_mb_num == 0) |
| 540 | { |
| 541 | if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 542 | { |
| 543 | /* If the reference frame used by the left subMB is same as the |
| 544 | reference frame used by the current block then MV predictor to |
| 545 | be used for the current block is same as the MV of the left |
| 546 | subMB */ |
| 547 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 548 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| 549 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 550 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| 551 | } |
| 552 | else |
| 553 | { |
| 554 | /* The MV predictor is calculated according to the process |
| 555 | defined in 8.4.1.2.1 */ |
| 556 | ih264d_get_motion_vector_predictor( |
| 557 | ps_mv_final_pred, |
| 558 | ps_mv_pred, |
| 559 | u1_ref_idx, |
| 560 | uc_lx, |
| 561 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 562 | } |
| 563 | } |
| 564 | else |
| 565 | { |
| 566 | if(ps_mv_pred[TOP_R]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 567 | { |
| 568 | /* If the reference frame used by the top right subMB is same as |
| 569 | the reference frame used by the current block then MV |
| 570 | predictor to be used for the current block is same as the MV |
| 571 | of the left subMB */ |
| 572 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 573 | ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 0]; |
| 574 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 575 | ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 1]; |
| 576 | } |
| 577 | else |
| 578 | { |
| 579 | /* The MV predictor is calculated according to the process |
| 580 | defined in 8.4.1.2.1 */ |
| 581 | ih264d_get_motion_vector_predictor( |
| 582 | ps_mv_final_pred, |
| 583 | ps_mv_pred, |
| 584 | u1_ref_idx, |
| 585 | uc_lx, |
| 586 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 587 | } |
| 588 | } |
| 589 | break; |
| 590 | case B_DIRECT_SPATIAL: |
| 591 | /* Case when the MB has been skipped */ |
| 592 | /* If either of left or the top subMB is not present |
| 593 | OR |
| 594 | If both the MV components of either the left or the top subMB are |
| 595 | zero and their reference frame pointer pointing to 0 |
| 596 | then MV for the skipped MB is zero |
| 597 | else the Median of the mv_pred_t is used */ |
| 598 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| 599 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| 600 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| 601 | |
| 602 | ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| 603 | MIN(uc_temp2, uc_temp3)); |
| 604 | |
| 605 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| 606 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| 607 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| 608 | |
| 609 | ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| 610 | MIN(uc_temp2, uc_temp3)); |
| 611 | |
| 612 | if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| 613 | && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| 614 | { |
| 615 | u1_direct_zero_pred_flag = 1; |
| 616 | ps_mv_final_pred->i1_ref_frame[0] = 0; |
| 617 | ps_mv_final_pred->i1_ref_frame[1] = 0; |
| 618 | } |
| 619 | ih264d_get_motion_vector_predictor( |
| 620 | ps_mv_final_pred, ps_mv_pred, |
| 621 | ps_mv_final_pred->i1_ref_frame[0], 0, |
| 622 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 623 | |
| 624 | ih264d_get_motion_vector_predictor( |
| 625 | ps_mv_final_pred, ps_mv_pred, |
| 626 | ps_mv_final_pred->i1_ref_frame[1], 1, |
| 627 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 628 | |
| 629 | break; |
| 630 | case MB_SKIP: |
| 631 | /* Case when the MB has been skipped */ |
| 632 | /* If either of left or the top subMB is not present |
| 633 | OR |
| 634 | If both the MV components of either the left or the top subMB are |
| 635 | zero and their reference frame pointer pointing to 0 |
| 636 | then MV for the skipped MB is zero |
| 637 | else the Median of the mv_pred_t is used */ |
| 638 | u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 639 | LEFT_MB_AVAILABLE_MASK); |
| 640 | u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 641 | TOP_MB_AVAILABLE_MASK); |
| 642 | if(((u1_a_in * u1_b_in) == 0) |
| 643 | || ((ps_mv_pred[LEFT]->i2_mv[0] |
| 644 | | ps_mv_pred[LEFT]->i2_mv[1] |
| 645 | | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| 646 | == 0) |
| 647 | || ((ps_mv_pred[TOP]->i2_mv[0] |
| 648 | | ps_mv_pred[TOP]->i2_mv[1] |
| 649 | | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| 650 | == 0)) |
| 651 | { |
| 652 | ps_mv_final_pred->i2_mv[0] = 0; |
| 653 | ps_mv_final_pred->i2_mv[1] = 0; |
| 654 | break; |
| 655 | } |
| 656 | /* If the condition above is not true calculate the MV predictor |
| 657 | according to the process defined in sec 8.4.1.2.1 */ |
| 658 | default: |
| 659 | ih264d_get_motion_vector_predictor( |
| 660 | ps_mv_final_pred, ps_mv_pred, u1_ref_idx, uc_lx, |
| 661 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 662 | break; |
| 663 | } |
| 664 | } |
| 665 | return (u1_direct_zero_pred_flag); |
| 666 | } |
| 667 | #endif |
| 668 | |
| 669 | /*****************************************************************************/ |
| 670 | /* */ |
| 671 | /* Function Name : ih264d_mvpred_nonmbaff */ |
| 672 | /* */ |
| 673 | /* Description : This function calculates the motion vector predictor, */ |
| 674 | /* for all the slice types other than B_SLICE */ |
| 675 | /* Inputs : <What inputs does the function take?> */ |
| 676 | /* Globals : None */ |
| 677 | /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| 678 | /* and based on the type of Mb the prediction is */ |
| 679 | /* appropriately done */ |
| 680 | /* Outputs : populates ps_mv_final_pred structure */ |
| 681 | /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| 682 | /* decodeSpatialdirect() */ |
| 683 | /* */ |
| 684 | /* Issues : <List any issues or problems with this function> */ |
| 685 | /* */ |
| 686 | /* Revision History: */ |
| 687 | /* */ |
| 688 | /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| 689 | /* 03 05 2005 TA First Draft */ |
| 690 | /* */ |
| 691 | /*****************************************************************************/ |
| 692 | #if(!MVPRED_NONMBAFF) |
| 693 | UWORD8 ih264d_mvpred_nonmbaff(dec_struct_t *ps_dec, |
| 694 | dec_mb_info_t *ps_cur_mb_info, |
| 695 | mv_pred_t *ps_mv_nmb, |
| 696 | mv_pred_t *ps_mv_ntop, |
| 697 | mv_pred_t *ps_mv_final_pred, |
| 698 | UWORD8 u1_sub_mb_num, |
| 699 | UWORD8 uc_mb_part_width, |
| 700 | UWORD8 u1_lx_start, |
| 701 | UWORD8 u1_lxend, |
| 702 | UWORD8 u1_mb_mc_mode) |
| 703 | { |
| 704 | UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| 705 | mv_pred_t *ps_mv_pred[3]; |
| 706 | UWORD8 u1_ref_idx; |
| 707 | UWORD8 u1_direct_zero_pred_flag = 0; |
| 708 | UNUSED(u1_lx_start); |
| 709 | UNUSED(u1_lxend); |
| 710 | ih264d_non_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, |
| 711 | ps_dec, uc_mb_part_width, ps_cur_mb_info); |
| 712 | |
| 713 | u1_ref_idx = ps_mv_final_pred->i1_ref_frame[0]; |
| 714 | |
| 715 | switch(u1_mb_mc_mode) |
| 716 | { |
| 717 | case PRED_16x8: |
| 718 | /* Directional prediction for a 16x8 MB partition */ |
| 719 | if(u1_sub_mb_num == 0) |
| 720 | { |
| 721 | /* Calculating the MV pred for the top 16x8 block */ |
| 722 | if(ps_mv_pred[TOP]->i1_ref_frame[0] == u1_ref_idx) |
| 723 | { |
| 724 | /* If the reference frame used by the top subMB is same as the |
| 725 | reference frame used by the current block then MV predictor to |
| 726 | be used for the current block is same as the MV of the top |
| 727 | subMB */ |
| 728 | |
| 729 | ps_mv_final_pred->i2_mv[0] = ps_mv_pred[TOP]->i2_mv[0]; |
| 730 | ps_mv_final_pred->i2_mv[1] = ps_mv_pred[TOP]->i2_mv[1]; |
| 731 | } |
| 732 | else |
| 733 | { |
| 734 | /* The MV predictor is calculated according to the process |
| 735 | defined in 8.4.1.2.1 */ |
| 736 | ih264d_get_motion_vector_predictor( |
| 737 | ps_mv_final_pred, |
| 738 | ps_mv_pred, |
| 739 | u1_ref_idx, |
| 740 | 0, |
| 741 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 742 | } |
| 743 | } |
| 744 | else |
| 745 | { |
| 746 | if(ps_mv_pred[LEFT]->i1_ref_frame[0] == u1_ref_idx) |
| 747 | { |
| 748 | /* If the reference frame used by the left subMB is same as the |
| 749 | reference frame used by the current block then MV predictor to |
| 750 | be used for the current block is same as the MV of the left |
| 751 | subMB */ |
| 752 | |
| 753 | ps_mv_final_pred->i2_mv[0] = ps_mv_pred[LEFT]->i2_mv[0]; |
| 754 | ps_mv_final_pred->i2_mv[1] = ps_mv_pred[LEFT]->i2_mv[1]; |
| 755 | } |
| 756 | else |
| 757 | { |
| 758 | /* The MV predictor is calculated according to the process |
| 759 | defined in 8.4.1.2.1 */ |
| 760 | ih264d_get_motion_vector_predictor( |
| 761 | ps_mv_final_pred, |
| 762 | ps_mv_pred, |
| 763 | u1_ref_idx, |
| 764 | 0, |
| 765 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 766 | } |
| 767 | } |
| 768 | break; |
| 769 | case PRED_8x16: |
| 770 | /* Directional prediction for a 8x16 MB partition */ |
| 771 | if(u1_sub_mb_num == 0) |
| 772 | { |
| 773 | if(ps_mv_pred[LEFT]->i1_ref_frame[0] == u1_ref_idx) |
| 774 | { |
| 775 | /* If the reference frame used by the left subMB is same as the |
| 776 | reference frame used by the current block then MV predictor to |
| 777 | be used for the current block is same as the MV of the left |
| 778 | subMB */ |
| 779 | |
| 780 | ps_mv_final_pred->i2_mv[0] = ps_mv_pred[LEFT]->i2_mv[0]; |
| 781 | ps_mv_final_pred->i2_mv[1] = ps_mv_pred[LEFT]->i2_mv[1]; |
| 782 | } |
| 783 | else |
| 784 | { |
| 785 | /* The MV predictor is calculated according to the process |
| 786 | defined in 8.4.1.2.1 */ |
| 787 | ih264d_get_motion_vector_predictor( |
| 788 | ps_mv_final_pred, |
| 789 | ps_mv_pred, |
| 790 | u1_ref_idx, |
| 791 | 0, |
| 792 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 793 | } |
| 794 | } |
| 795 | else |
| 796 | { |
| 797 | if(ps_mv_pred[TOP_R]->i1_ref_frame[0] == u1_ref_idx) |
| 798 | { |
| 799 | /* If the reference frame used by the top right subMB is same as |
| 800 | the reference frame used by the current block then MV |
| 801 | predictor to be used for the current block is same as the MV |
| 802 | of the left subMB */ |
| 803 | |
| 804 | ps_mv_final_pred->i2_mv[0] = ps_mv_pred[TOP_R]->i2_mv[0]; |
| 805 | ps_mv_final_pred->i2_mv[1] = ps_mv_pred[TOP_R]->i2_mv[1]; |
| 806 | } |
| 807 | else |
| 808 | { |
| 809 | /* The MV predictor is calculated according to the process |
| 810 | defined in 8.4.1.2.1 */ |
| 811 | ih264d_get_motion_vector_predictor( |
| 812 | ps_mv_final_pred, |
| 813 | ps_mv_pred, |
| 814 | u1_ref_idx, |
| 815 | 0, |
| 816 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 817 | } |
| 818 | } |
| 819 | break; |
| 820 | case B_DIRECT_SPATIAL: |
| 821 | /* Case when the MB has been skipped */ |
| 822 | /* If either of left or the top subMB is not present |
| 823 | OR |
| 824 | If both the MV components of either the left or the top subMB are |
| 825 | zero and their reference frame pointer pointing to 0 |
| 826 | then MV for the skipped MB is zero |
| 827 | else the Median of the mv_pred_t is used */ |
| 828 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| 829 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| 830 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| 831 | |
| 832 | ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| 833 | MIN(uc_temp2, uc_temp3)); |
| 834 | |
| 835 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| 836 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| 837 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| 838 | |
| 839 | ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| 840 | MIN(uc_temp2, uc_temp3)); |
| 841 | |
| 842 | if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| 843 | && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| 844 | { |
| 845 | u1_direct_zero_pred_flag = 1; |
| 846 | ps_mv_final_pred->i1_ref_frame[0] = 0; |
| 847 | ps_mv_final_pred->i1_ref_frame[1] = 0; |
| 848 | } |
| 849 | ih264d_get_motion_vector_predictor( |
| 850 | ps_mv_final_pred, ps_mv_pred, |
| 851 | ps_mv_final_pred->i1_ref_frame[0], 0, |
| 852 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 853 | |
| 854 | ih264d_get_motion_vector_predictor( |
| 855 | ps_mv_final_pred, ps_mv_pred, |
| 856 | ps_mv_final_pred->i1_ref_frame[1], 1, |
| 857 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 858 | |
| 859 | break; |
| 860 | case MB_SKIP: |
| 861 | /* Case when the MB has been skipped */ |
| 862 | /* If either of left or the top subMB is not present |
| 863 | OR |
| 864 | If both the MV components of either the left or the top subMB are |
| 865 | zero and their reference frame pointer pointing to 0 |
| 866 | then MV for the skipped MB is zero |
| 867 | else the Median of the mv_pred_t is used */ |
| 868 | u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 869 | LEFT_MB_AVAILABLE_MASK); |
| 870 | u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 871 | TOP_MB_AVAILABLE_MASK); |
| 872 | if(((u1_a_in * u1_b_in) == 0) |
| 873 | || ((ps_mv_pred[LEFT]->i2_mv[0] |
| 874 | | ps_mv_pred[LEFT]->i2_mv[1] |
| 875 | | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| 876 | == 0) |
| 877 | || ((ps_mv_pred[TOP]->i2_mv[0] |
| 878 | | ps_mv_pred[TOP]->i2_mv[1] |
| 879 | | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| 880 | == 0)) |
| 881 | { |
| 882 | |
| 883 | ps_mv_final_pred->i2_mv[0] = 0; |
| 884 | ps_mv_final_pred->i2_mv[1] = 0; |
| 885 | break; |
| 886 | } |
| 887 | /* If the condition above is not true calculate the MV predictor |
| 888 | according to the process defined in sec 8.4.1.2.1 */ |
| 889 | default: |
| 890 | ih264d_get_motion_vector_predictor( |
| 891 | ps_mv_final_pred, ps_mv_pred, u1_ref_idx, 0, |
| 892 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 893 | break; |
| 894 | } |
| 895 | |
| 896 | return (u1_direct_zero_pred_flag); |
| 897 | } |
| 898 | #endif |
| 899 | |
| 900 | /*****************************************************************************/ |
| 901 | /* */ |
| 902 | /* Function Name : ih264d_mvpred_mbaff */ |
| 903 | /* */ |
| 904 | /* Description : This function calculates the motion vector predictor, */ |
| 905 | /* Inputs : <What inputs does the function take?> */ |
| 906 | /* Globals : None */ |
| 907 | /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| 908 | /* and based on the type of Mb the prediction is */ |
| 909 | /* appropriately done */ |
| 910 | /* Outputs : populates ps_mv_final_pred structure */ |
| 911 | /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| 912 | /* decodeSpatialdirect() */ |
| 913 | /* */ |
| 914 | /* Issues : <List any issues or problems with this function> */ |
| 915 | /* */ |
| 916 | /* Revision History: */ |
| 917 | /* */ |
| 918 | /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| 919 | /* 03 05 2005 TA First Draft */ |
| 920 | /* */ |
| 921 | /*****************************************************************************/ |
| 922 | |
| 923 | UWORD8 ih264d_mvpred_mbaff(dec_struct_t *ps_dec, |
| 924 | dec_mb_info_t *ps_cur_mb_info, |
| 925 | mv_pred_t *ps_mv_nmb, |
| 926 | mv_pred_t *ps_mv_ntop, |
| 927 | mv_pred_t *ps_mv_final_pred, |
| 928 | UWORD8 u1_sub_mb_num, |
| 929 | UWORD8 uc_mb_part_width, |
| 930 | UWORD8 u1_lx_start, |
| 931 | UWORD8 u1_lxend, |
| 932 | UWORD8 u1_mb_mc_mode) |
| 933 | { |
| 934 | UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| 935 | mv_pred_t *ps_mv_pred[3], s_mvPred[3]; |
| 936 | UWORD8 uc_B2, pu0_scale[3], i, uc_lx, u1_ref_idx; |
| 937 | UWORD8 u1_direct_zero_pred_flag = 0; |
| 938 | |
| 939 | pu0_scale[0] = pu0_scale[1] = pu0_scale[2] = 0; |
| 940 | ih264d_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, ps_dec, |
| 941 | uc_mb_part_width, ps_cur_mb_info, pu0_scale); |
| 942 | for(i = 0; i < 3; i++) |
| 943 | { |
| 944 | if(pu0_scale[i] != 0) |
| 945 | { |
| 946 | memcpy(&s_mvPred[i], ps_mv_pred[i], sizeof(mv_pred_t)); |
| 947 | if(pu0_scale[i] == 1) |
| 948 | { |
| 949 | s_mvPred[i].i1_ref_frame[0] = s_mvPred[i].i1_ref_frame[0] << 1; |
| 950 | s_mvPred[i].i1_ref_frame[1] = s_mvPred[i].i1_ref_frame[1] << 1; |
| 951 | s_mvPred[i].i2_mv[1] = SIGN_POW2_DIV(s_mvPred[i].i2_mv[1], 1); |
| 952 | s_mvPred[i].i2_mv[3] = SIGN_POW2_DIV(s_mvPred[i].i2_mv[3], 1); |
| 953 | } |
| 954 | else |
| 955 | { |
| 956 | s_mvPred[i].i1_ref_frame[0] = s_mvPred[i].i1_ref_frame[0] >> 1; |
| 957 | s_mvPred[i].i1_ref_frame[1] = s_mvPred[i].i1_ref_frame[1] >> 1; |
| 958 | s_mvPred[i].i2_mv[1] = s_mvPred[i].i2_mv[1] << 1; |
| 959 | s_mvPred[i].i2_mv[3] = s_mvPred[i].i2_mv[3] << 1; |
| 960 | } |
| 961 | ps_mv_pred[i] = &s_mvPred[i]; |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | for(uc_lx = u1_lx_start; uc_lx < u1_lxend; uc_lx++) |
| 966 | { |
| 967 | u1_ref_idx = ps_mv_final_pred->i1_ref_frame[uc_lx]; |
| 968 | uc_B2 = (uc_lx << 1); |
| 969 | switch(u1_mb_mc_mode) |
| 970 | { |
| 971 | case PRED_16x8: |
| 972 | /* Directional prediction for a 16x8 MB partition */ |
| 973 | if(u1_sub_mb_num == 0) |
| 974 | { |
| 975 | /* Calculating the MV pred for the top 16x8 block */ |
| 976 | if(ps_mv_pred[TOP]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 977 | { |
| 978 | /* If the reference frame used by the top subMB is same as the |
| 979 | reference frame used by the current block then MV predictor to |
| 980 | be used for the current block is same as the MV of the top |
| 981 | subMB */ |
| 982 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 983 | ps_mv_pred[TOP]->i2_mv[uc_B2 + 0]; |
| 984 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 985 | ps_mv_pred[TOP]->i2_mv[uc_B2 + 1]; |
| 986 | } |
| 987 | else |
| 988 | { |
| 989 | /* The MV predictor is calculated according to the process |
| 990 | defined in 8.4.1.2.1 */ |
| 991 | ih264d_get_motion_vector_predictor( |
| 992 | ps_mv_final_pred, |
| 993 | ps_mv_pred, |
| 994 | u1_ref_idx, |
| 995 | uc_lx, |
| 996 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 997 | } |
| 998 | } |
| 999 | else |
| 1000 | { |
| 1001 | if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 1002 | { |
| 1003 | /* If the reference frame used by the left subMB is same as the |
| 1004 | reference frame used by the current block then MV predictor to |
| 1005 | be used for the current block is same as the MV of the left |
| 1006 | subMB */ |
| 1007 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 1008 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| 1009 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 1010 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| 1011 | } |
| 1012 | else |
| 1013 | { |
| 1014 | /* The MV predictor is calculated according to the process |
| 1015 | defined in 8.4.1.2.1 */ |
| 1016 | ih264d_get_motion_vector_predictor( |
| 1017 | ps_mv_final_pred, |
| 1018 | ps_mv_pred, |
| 1019 | u1_ref_idx, |
| 1020 | uc_lx, |
| 1021 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1022 | } |
| 1023 | } |
| 1024 | break; |
| 1025 | case PRED_8x16: |
| 1026 | /* Directional prediction for a 8x16 MB partition */ |
| 1027 | if(u1_sub_mb_num == 0) |
| 1028 | { |
| 1029 | if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 1030 | { |
| 1031 | /* If the reference frame used by the left subMB is same as the |
| 1032 | reference frame used by the current block then MV predictor to |
| 1033 | be used for the current block is same as the MV of the left |
| 1034 | subMB */ |
| 1035 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 1036 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| 1037 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 1038 | ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| 1039 | } |
| 1040 | else |
| 1041 | { |
| 1042 | /* The MV predictor is calculated according to the process |
| 1043 | defined in 8.4.1.2.1 */ |
| 1044 | ih264d_get_motion_vector_predictor( |
| 1045 | ps_mv_final_pred, |
| 1046 | ps_mv_pred, |
| 1047 | u1_ref_idx, |
| 1048 | uc_lx, |
| 1049 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1050 | } |
| 1051 | } |
| 1052 | else |
| 1053 | { |
| 1054 | if(ps_mv_pred[TOP_R]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| 1055 | { |
| 1056 | /* If the reference frame used by the top right subMB is same as |
| 1057 | the reference frame used by the current block then MV |
| 1058 | predictor to be used for the current block is same as the MV |
| 1059 | of the left subMB */ |
| 1060 | ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| 1061 | ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 0]; |
| 1062 | ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| 1063 | ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 1]; |
| 1064 | } |
| 1065 | else |
| 1066 | { |
| 1067 | /* The MV predictor is calculated according to the process |
| 1068 | defined in 8.4.1.2.1 */ |
| 1069 | ih264d_get_motion_vector_predictor( |
| 1070 | ps_mv_final_pred, |
| 1071 | ps_mv_pred, |
| 1072 | u1_ref_idx, |
| 1073 | uc_lx, |
| 1074 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1075 | } |
| 1076 | } |
| 1077 | break; |
| 1078 | case B_DIRECT_SPATIAL: |
| 1079 | /* Case when the MB has been skipped */ |
| 1080 | /* If either of left or the top subMB is not present |
| 1081 | OR |
| 1082 | If both the MV components of either the left or the top subMB are |
| 1083 | zero and their reference frame pointer pointing to 0 |
| 1084 | then MV for the skipped MB is zero |
| 1085 | else the Median of the mv_pred_t is used */ |
| 1086 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| 1087 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| 1088 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| 1089 | |
| 1090 | ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| 1091 | MIN(uc_temp2, uc_temp3)); |
| 1092 | |
| 1093 | uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| 1094 | uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| 1095 | uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| 1096 | |
| 1097 | ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| 1098 | MIN(uc_temp2, uc_temp3)); |
| 1099 | |
| 1100 | /* If the reference indices are negative clip the scaled reference indices to -1 */ |
| 1101 | /* i.e invalid reference index */ |
| 1102 | |
| 1103 | /*if(ps_mv_final_pred->i1_ref_frame[0] < 0) |
| 1104 | ps_mv_final_pred->i1_ref_frame[0] = -1; |
| 1105 | |
| 1106 | if(ps_mv_final_pred->i1_ref_frame[1] < 0) |
| 1107 | ps_mv_final_pred->i1_ref_frame[1] = -1; */ |
| 1108 | |
| 1109 | if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| 1110 | && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| 1111 | { |
| 1112 | u1_direct_zero_pred_flag = 1; |
| 1113 | ps_mv_final_pred->i1_ref_frame[0] = 0; |
| 1114 | ps_mv_final_pred->i1_ref_frame[1] = 0; |
| 1115 | } |
| 1116 | ih264d_get_motion_vector_predictor( |
| 1117 | ps_mv_final_pred, ps_mv_pred, |
| 1118 | ps_mv_final_pred->i1_ref_frame[0], 0, |
| 1119 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1120 | |
| 1121 | ih264d_get_motion_vector_predictor( |
| 1122 | ps_mv_final_pred, ps_mv_pred, |
| 1123 | ps_mv_final_pred->i1_ref_frame[1], 1, |
| 1124 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1125 | |
| 1126 | break; |
| 1127 | case MB_SKIP: |
| 1128 | /* Case when the MB has been skipped */ |
| 1129 | /* If either of left or the top subMB is not present |
| 1130 | OR |
| 1131 | If both the MV components of either the left or the top subMB are |
| 1132 | zero and their reference frame pointer pointing to 0 |
| 1133 | then MV for the skipped MB is zero |
| 1134 | else the Median of the mv_pred_t is used */ |
| 1135 | u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 1136 | LEFT_MB_AVAILABLE_MASK); |
| 1137 | u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| 1138 | TOP_MB_AVAILABLE_MASK); |
| 1139 | if(((u1_a_in * u1_b_in) == 0) |
| 1140 | || ((ps_mv_pred[LEFT]->i2_mv[0] |
| 1141 | | ps_mv_pred[LEFT]->i2_mv[1] |
| 1142 | | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| 1143 | == 0) |
| 1144 | || ((ps_mv_pred[TOP]->i2_mv[0] |
| 1145 | | ps_mv_pred[TOP]->i2_mv[1] |
| 1146 | | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| 1147 | == 0)) |
| 1148 | { |
| 1149 | ps_mv_final_pred->i2_mv[0] = 0; |
| 1150 | ps_mv_final_pred->i2_mv[1] = 0; |
| 1151 | break; |
| 1152 | } |
| 1153 | /* If the condition above is not true calculate the MV predictor |
| 1154 | according to the process defined in sec 8.4.1.2.1 */ |
| 1155 | default: |
| 1156 | ih264d_get_motion_vector_predictor( |
| 1157 | ps_mv_final_pred, ps_mv_pred, u1_ref_idx, uc_lx, |
| 1158 | (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| 1159 | break; |
| 1160 | } |
| 1161 | } |
| 1162 | return (u1_direct_zero_pred_flag); |
| 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | |
| 1167 | |
| 1168 | void ih264d_rep_mv_colz(dec_struct_t *ps_dec, |
| 1169 | mv_pred_t *ps_mv_pred_src, |
| 1170 | mv_pred_t *ps_mv_pred_dst, |
| 1171 | UWORD8 u1_sub_mb_num, |
| 1172 | UWORD8 u1_colz, |
| 1173 | UWORD8 u1_ht, |
| 1174 | UWORD8 u1_wd) |
| 1175 | { |
| 1176 | |
| 1177 | UWORD8 k, m; |
| 1178 | UWORD8 *pu1_colz = ps_dec->pu1_col_zero_flag + ps_dec->i4_submb_ofst |
| 1179 | + u1_sub_mb_num; |
| 1180 | |
| 1181 | for(k = 0; k < u1_ht; k++) |
| 1182 | { |
| 1183 | for(m = 0; m < u1_wd; m++) |
| 1184 | { |
| 1185 | *(ps_mv_pred_dst + m) = *(ps_mv_pred_src); |
| 1186 | *(pu1_colz + m) = u1_colz; |
| 1187 | |
| 1188 | } |
| 1189 | pu1_colz += SUB_BLK_WIDTH; |
| 1190 | ps_mv_pred_dst += SUB_BLK_WIDTH; |
| 1191 | } |
| 1192 | } |
| 1193 | |