| /****************************************************************************** |
| * |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ***************************************************************************** |
| * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
| */ |
| /*! |
| ************************************************************************** |
| * \file ih264d_mvpred.c |
| * |
| * \brief |
| * This file contains function specific to decoding Motion vector. |
| * |
| * Detailed_description |
| * |
| * \date |
| * 10-12-2002 |
| * |
| * \author Arvind Raman |
| ************************************************************************** |
| */ |
| #include <string.h> |
| #include "ih264d_parse_cavlc.h" |
| #include "ih264d_error_handler.h" |
| #include "ih264d_structs.h" |
| #include "ih264d_defs.h" |
| #include "ih264_typedefs.h" |
| #include "ih264_macros.h" |
| #include "ih264_platform_macros.h" |
| #include "ih264d_mb_utils.h" |
| #include "ih264d_defs.h" |
| #include "ih264d_debug.h" |
| #include "ih264d_tables.h" |
| #include "ih264d_process_bslice.h" |
| #include "ih264d_mvpred.h" |
| #include "ih264d_inter_pred.h" |
| #include "ih264d_tables.h" |
| |
| /*! |
| ************************************************************************** |
| * \if ih264d_get_motion_vector_predictor name : Name \endif |
| * |
| * \brief |
| * The routine calculates the motion vector predictor for a given block, |
| * given the candidate MV predictors. |
| * |
| * \param ps_mv_pred: Candidate predictors for the current block |
| * \param ps_currMv: Pointer to the left top edge of the current block in |
| * the MV bank |
| * |
| * \return |
| * _mvPred: The x & y components of the MV predictor. |
| * |
| * \note |
| * The code implements the logic as described in sec 8.4.1.2.1. Given |
| * the candidate predictors and the pointer to the top left edge of the |
| * block in the MV bank. |
| * |
| ************************************************************************** |
| */ |
| |
| void ih264d_get_motion_vector_predictor(mv_pred_t * ps_result, |
| mv_pred_t **ps_mv_pred, |
| UWORD8 u1_ref_idx, |
| UWORD8 u1_B, |
| const UWORD8 *pu1_mv_pred_condition) |
| { |
| WORD8 c_temp; |
| UWORD8 uc_B2 = (u1_B << 1); |
| |
| /* If only one of the candidate blocks has a reference frame equal to |
| the current block then use the same block as the final predictor */ |
| c_temp = |
| (ps_mv_pred[LEFT]->i1_ref_frame[u1_B] == u1_ref_idx) |
| | ((ps_mv_pred[TOP]->i1_ref_frame[u1_B] |
| == u1_ref_idx) << 1) |
| | ((ps_mv_pred[TOP_R]->i1_ref_frame[u1_B] |
| == u1_ref_idx) << 2); |
| c_temp = pu1_mv_pred_condition[c_temp]; |
| |
| if(c_temp != -1) |
| { |
| /* Case when only when one of the cadidate block has the same |
| reference frame as the current block */ |
| ps_result->i2_mv[uc_B2 + 0] = ps_mv_pred[c_temp]->i2_mv[uc_B2 + 0]; |
| ps_result->i2_mv[uc_B2 + 1] = ps_mv_pred[c_temp]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| WORD32 D0, D1; |
| D0 = MIN(ps_mv_pred[0]->i2_mv[uc_B2 + 0], |
| ps_mv_pred[1]->i2_mv[uc_B2 + 0]); |
| D1 = MAX(ps_mv_pred[0]->i2_mv[uc_B2 + 0], |
| ps_mv_pred[1]->i2_mv[uc_B2 + 0]); |
| D1 = MIN(D1, ps_mv_pred[2]->i2_mv[uc_B2 + 0]); |
| ps_result->i2_mv[uc_B2 + 0] = (WORD16)(MAX(D0, D1)); |
| |
| D0 = MIN(ps_mv_pred[0]->i2_mv[uc_B2 + 1], |
| ps_mv_pred[1]->i2_mv[uc_B2 + 1]); |
| D1 = MAX(ps_mv_pred[0]->i2_mv[uc_B2 + 1], |
| ps_mv_pred[1]->i2_mv[uc_B2 + 1]); |
| D1 = MIN(D1, ps_mv_pred[2]->i2_mv[uc_B2 + 1]); |
| ps_result->i2_mv[uc_B2 + 1] = (WORD16)(MAX(D0, D1)); |
| |
| } |
| } |
| |
| /*! |
| ************************************************************************** |
| * \if ih264d_mbaff_mv_pred name : Name \endif |
| * |
| * \brief |
| * The routine calculates the motion vector predictor for a given block, |
| * given the candidate MV predictors. |
| * |
| * \param ps_mv_pred: Candidate predictors for the current block |
| * \param ps_currMv: Pointer to the left top edge of the current block in |
| * the MV bank |
| * |
| * \return |
| * _mvPred: The x & y components of the MV predictor. |
| * |
| * \note |
| * The code implements the logic as described in sec 8.4.1.2.1. Given |
| * the candidate predictors and the pointer to the top left edge of the |
| * block in the MV bank. |
| * |
| ************************************************************************** |
| */ |
| |
| void ih264d_mbaff_mv_pred(mv_pred_t **ps_mv_pred, |
| UWORD8 u1_sub_mb_num, |
| mv_pred_t *ps_mv_nmb, |
| mv_pred_t *ps_mv_ntop, |
| dec_struct_t *ps_dec, |
| UWORD8 uc_mb_part_width, |
| dec_mb_info_t *ps_cur_mb_info, |
| UWORD8* pu0_scale) |
| { |
| UWORD16 u2_a_in = 0, u2_b_in = 0, u2_c_in = 0, u2_d_in = 0; |
| mv_pred_t *ps_mvpred_l, *ps_mvpred_tmp; |
| UWORD8 u1_sub_mb_x = (u1_sub_mb_num & 3), uc_sub_mb_y = (u1_sub_mb_num >> 2); |
| UWORD8 u1_is_cur_mb_fld, u1_is_left_mb_fld, u1_is_top_mb_fld; |
| UWORD8 u1_is_cur_mb_top; |
| |
| u1_is_cur_mb_fld = ps_cur_mb_info->u1_mb_field_decodingflag; |
| u1_is_cur_mb_top = ps_cur_mb_info->u1_topmb; |
| |
| u1_is_left_mb_fld = ps_cur_mb_info->ps_left_mb->u1_mb_fld; |
| u1_is_top_mb_fld = ps_cur_mb_info->ps_top_mb->u1_mb_fld; |
| |
| /* Checking in the subMB exists, calculating their motion vectors to be |
| used as predictors and the reference frames of those subMBs */ |
| ps_mv_pred[LEFT] = &ps_dec->s_default_mv_pred; |
| ps_mv_pred[TOP] = &(ps_dec->s_default_mv_pred); |
| ps_mv_pred[TOP_R] = &(ps_dec->s_default_mv_pred); |
| |
| /* Check if the left subMb is available */ |
| if(u1_sub_mb_x) |
| { |
| u2_a_in = 1; |
| ps_mv_pred[LEFT] = (ps_mv_nmb - 1); |
| } |
| else |
| { |
| UWORD8 uc_temp; |
| u2_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & LEFT_MB_AVAILABLE_MASK); |
| if(u2_a_in) |
| { |
| ps_mvpred_l = (ps_dec->u4_num_pmbair) ? |
| ps_mv_nmb : |
| (ps_dec->ps_mv_left + (uc_sub_mb_y << 2) + 48 |
| - (u1_is_cur_mb_top << 4)); |
| uc_temp = 29; |
| if(u1_is_cur_mb_fld ^ u1_is_left_mb_fld) |
| { |
| if(u1_is_left_mb_fld) |
| { |
| uc_temp += |
| (((uc_sub_mb_y & 1) << 2) |
| + ((uc_sub_mb_y & 2) << 1)); |
| uc_temp += ((u1_is_cur_mb_top) ? 0 : 8); |
| } |
| else |
| { |
| uc_temp = uc_temp - (uc_sub_mb_y << 2); |
| uc_temp += ((u1_is_cur_mb_top) ? 0 : 16); |
| } |
| } |
| ps_mv_pred[LEFT] = (ps_mvpred_l - uc_temp); |
| pu0_scale[LEFT] = u1_is_cur_mb_fld - u1_is_left_mb_fld; |
| } |
| } |
| |
| /* Check if the top subMB is available */ |
| if((uc_sub_mb_y > 0) || ((u1_is_cur_mb_top | u1_is_cur_mb_fld) == 0)) |
| { |
| u2_b_in = 1; |
| ps_mv_pred[TOP] = ps_mv_nmb - 4; |
| } |
| else |
| { |
| u2_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & TOP_MB_AVAILABLE_MASK); |
| if(u2_b_in) |
| { |
| /* CHANGED CODE */ |
| |
| if(u1_is_top_mb_fld && u1_is_cur_mb_fld) |
| ps_mvpred_tmp = ps_mv_ntop; |
| else |
| { |
| ps_mvpred_tmp = ps_mv_ntop; |
| if(u1_is_cur_mb_top) |
| ps_mvpred_tmp += 16; |
| } |
| |
| ps_mv_pred[TOP] = ps_mvpred_tmp; |
| pu0_scale[TOP] = u1_is_cur_mb_fld - u1_is_top_mb_fld; |
| } |
| } |
| |
| /* Check if the top right subMb is available. The top right subMb is |
| defined as the top right subMb at the top right corner of the MB |
| partition. The top right subMb index starting from the top left |
| corner of the MB partition is given by |
| TopRightSubMbIndx = TopLeftSubMbIndx + (WidthOfMbPartition - 6) / 2 |
| */ |
| u2_c_in = CHECKBIT(ps_cur_mb_info->u2_top_right_avail_mask, |
| (u1_sub_mb_num + uc_mb_part_width - 1)); |
| if(u2_c_in) |
| { |
| ps_mv_pred[TOP_R] = ps_mv_pred[TOP] + uc_mb_part_width; |
| pu0_scale[TOP_R] = pu0_scale[TOP]; |
| if((uc_sub_mb_y == 0) && ((u1_sub_mb_x + uc_mb_part_width) > 3)) |
| { |
| UWORD8 uc_isTopRtMbFld; |
| uc_isTopRtMbFld = ps_cur_mb_info->ps_top_right_mb->u1_mb_fld; |
| /* CHANGED CODE */ |
| ps_mvpred_tmp = ps_mv_ntop + uc_mb_part_width + 12; |
| ps_mvpred_tmp += (u1_is_cur_mb_top) ? 16 : 0; |
| ps_mvpred_tmp += (u1_is_cur_mb_fld && u1_is_cur_mb_top && uc_isTopRtMbFld) ? |
| 0 : 16; |
| ps_mv_pred[TOP_R] = ps_mvpred_tmp; |
| pu0_scale[TOP_R] = u1_is_cur_mb_fld - uc_isTopRtMbFld; |
| } |
| } |
| else |
| { |
| u2_d_in = CHECKBIT(ps_cur_mb_info->u2_top_left_avail_mask, u1_sub_mb_num); |
| |
| /* Check if the the top left subMB is available */ |
| if(u2_d_in) |
| { |
| UWORD8 uc_isTopLtMbFld; |
| |
| ps_mv_pred[TOP_R] = ps_mv_pred[TOP] - 1; |
| pu0_scale[TOP_R] = pu0_scale[TOP]; |
| |
| if(u1_sub_mb_x == 0) |
| { |
| if((uc_sub_mb_y > 0) || ((u1_is_cur_mb_top | u1_is_cur_mb_fld) == 0)) |
| { |
| uc_isTopLtMbFld = u1_is_left_mb_fld; |
| ps_mvpred_tmp = ps_mv_pred[LEFT] - 4; |
| |
| if((u1_is_cur_mb_fld == 0) && uc_isTopLtMbFld) |
| { |
| ps_mvpred_tmp = ps_mv_pred[LEFT] + 16; |
| ps_mvpred_tmp -= (uc_sub_mb_y & 1) ? 0 : 4; |
| } |
| } |
| else |
| { |
| UWORD32 u4_cond = ps_dec->u4_num_pmbair; |
| uc_isTopLtMbFld = ps_cur_mb_info->u1_topleft_mb_fld; |
| |
| /* CHANGED CODE */ |
| ps_mvpred_tmp = ps_mv_ntop - 29; |
| ps_mvpred_tmp += (u1_is_cur_mb_top) ? 16 : 0; |
| if(u1_is_cur_mb_fld && u1_is_cur_mb_top) |
| ps_mvpred_tmp -= (uc_isTopLtMbFld) ? 16 : 0; |
| } |
| ps_mv_pred[TOP_R] = ps_mvpred_tmp; |
| pu0_scale[TOP_R] = u1_is_cur_mb_fld - uc_isTopLtMbFld; |
| } |
| } |
| else if(u2_b_in == 0) |
| { |
| /* If all the subMBs B, C, D are all out of the frame then their MV |
| and their reference picture is equal to that of A */ |
| ps_mv_pred[TOP] = ps_mv_pred[LEFT]; |
| ps_mv_pred[TOP_R] = ps_mv_pred[LEFT]; |
| pu0_scale[TOP] = pu0_scale[LEFT]; |
| pu0_scale[TOP_R] = pu0_scale[LEFT]; |
| } |
| } |
| } |
| |
| /*! |
| ************************************************************************** |
| * \if ih264d_non_mbaff_mv_pred name : Name \endif |
| * |
| * \brief |
| * The routine calculates the motion vector predictor for a given block, |
| * given the candidate MV predictors. |
| * |
| * \param ps_mv_pred: Candidate predictors for the current block |
| * \param ps_currMv: Pointer to the left top edge of the current block in |
| * the MV bank |
| * |
| * \return |
| * _mvPred: The x & y components of the MV predictor. |
| * |
| * \note |
| * The code implements the logic as described in sec 8.4.1.2.1. Given |
| * the candidate predictors and the pointer to the top left edge of the |
| * block in the MV bank. |
| * |
| ************************************************************************** |
| */ |
| #if(!MVPRED_NONMBAFF) |
| void ih264d_non_mbaff_mv_pred(mv_pred_t **ps_mv_pred, |
| UWORD8 u1_sub_mb_num, |
| mv_pred_t *ps_mv_nmb, |
| mv_pred_t *ps_mv_ntop, |
| dec_struct_t *ps_dec, |
| UWORD8 uc_mb_part_width, |
| dec_mb_info_t *ps_cur_mb_info) |
| { |
| UWORD16 u2_b_in = 0, u2_c_in = 0, u2_d_in = 0; |
| UWORD8 u1_sub_mb_x = (u1_sub_mb_num & 3), uc_sub_mb_y = (u1_sub_mb_num >> 2); |
| |
| /* Checking in the subMB exists, calculating their motion vectors to be |
| used as predictors and the reference frames of those subMBs */ |
| |
| ps_mv_pred[LEFT] = &ps_dec->s_default_mv_pred; |
| ps_mv_pred[TOP] = &(ps_dec->s_default_mv_pred); |
| ps_mv_pred[TOP_R] = &(ps_dec->s_default_mv_pred); |
| /* Check if the left subMb is available */ |
| |
| if(u1_sub_mb_x) |
| { |
| ps_mv_pred[LEFT] = (ps_mv_nmb - 1); |
| } |
| else |
| { |
| if(ps_cur_mb_info->u1_mb_ngbr_availablity & LEFT_MB_AVAILABLE_MASK) |
| { |
| ps_mv_pred[LEFT] = (ps_mv_nmb - 13); |
| } |
| } |
| |
| /* Check if the top subMB is available */ |
| if(uc_sub_mb_y) |
| { |
| u2_b_in = 1; |
| ps_mv_ntop = ps_mv_nmb - 4; |
| ps_mv_pred[TOP] = ps_mv_ntop; |
| |
| } |
| else |
| { |
| u2_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & TOP_MB_AVAILABLE_MASK); |
| if(u2_b_in) |
| { |
| ps_mv_pred[TOP] = ps_mv_ntop; |
| } |
| } |
| |
| /* Check if the top right subMb is available. The top right subMb is |
| defined as the top right subMb at the top right corner of the MB |
| partition. The top right subMb index starting from the top left |
| corner of the MB partition is given by |
| TopRightSubMbIndx = TopLeftSubMbIndx + (WidthOfMbPartition - 6) / 2 |
| */ |
| u2_c_in = CHECKBIT(ps_cur_mb_info->u2_top_right_avail_mask, |
| (u1_sub_mb_num + uc_mb_part_width - 1)); |
| if(u2_c_in) |
| { |
| ps_mv_pred[TOP_R] = (ps_mv_ntop + uc_mb_part_width); |
| |
| if(uc_sub_mb_y == 0) |
| { |
| /* CHANGED CODE */ |
| if((u1_sub_mb_x + uc_mb_part_width) > 3) |
| ps_mv_pred[TOP_R] += 12; |
| } |
| } |
| else |
| { |
| u2_d_in = CHECKBIT(ps_cur_mb_info->u2_top_left_avail_mask, u1_sub_mb_num); |
| /* Check if the the top left subMB is available */ |
| if(u2_d_in) |
| { |
| /* CHANGED CODE */ |
| ps_mv_pred[TOP_R] = (ps_mv_ntop - 1); |
| if(u1_sub_mb_x == 0) |
| { |
| if(uc_sub_mb_y) |
| { |
| ps_mv_pred[TOP_R] = (ps_mv_nmb - 17); |
| } |
| else |
| { |
| /* CHANGED CODE */ |
| ps_mv_pred[TOP_R] -= 12; |
| } |
| } |
| } |
| else if(u2_b_in == 0) |
| { |
| /* If all the subMBs B, C, D are all out of the frame then their MV |
| and their reference picture is equal to that of A */ |
| ps_mv_pred[TOP] = ps_mv_pred[LEFT]; |
| ps_mv_pred[TOP_R] = ps_mv_pred[LEFT]; |
| } |
| } |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_mvpred_nonmbaffB */ |
| /* */ |
| /* Description : This function calculates the motion vector predictor, */ |
| /* for B-Slices */ |
| /* Inputs : <What inputs does the function take?> */ |
| /* Globals : None */ |
| /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| /* and based on the type of Mb the prediction is */ |
| /* appropriately done */ |
| /* Outputs : populates ps_mv_final_pred structure */ |
| /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| /* decodeSpatialdirect() */ |
| /* */ |
| /* Issues : <List any issues or problems with this function> */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 03 05 2005 TA First Draft */ |
| /* */ |
| /*****************************************************************************/ |
| #if(!MVPRED_NONMBAFF) |
| UWORD8 ih264d_mvpred_nonmbaffB(dec_struct_t *ps_dec, |
| dec_mb_info_t *ps_cur_mb_info, |
| mv_pred_t *ps_mv_nmb, |
| mv_pred_t *ps_mv_ntop, |
| mv_pred_t *ps_mv_final_pred, |
| UWORD8 u1_sub_mb_num, |
| UWORD8 uc_mb_part_width, |
| UWORD8 u1_lx_start, |
| UWORD8 u1_lxend, |
| UWORD8 u1_mb_mc_mode) |
| { |
| UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| mv_pred_t *ps_mv_pred[3]; |
| UWORD8 uc_B2, uc_lx, u1_ref_idx; |
| UWORD8 u1_direct_zero_pred_flag = 0; |
| |
| ih264d_non_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, |
| ps_dec, uc_mb_part_width, ps_cur_mb_info); |
| |
| for(uc_lx = u1_lx_start; uc_lx < u1_lxend; uc_lx++) |
| { |
| u1_ref_idx = ps_mv_final_pred->i1_ref_frame[uc_lx]; |
| uc_B2 = (uc_lx << 1); |
| switch(u1_mb_mc_mode) |
| { |
| case PRED_16x8: |
| /* Directional prediction for a 16x8 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| /* Calculating the MV pred for the top 16x8 block */ |
| if(ps_mv_pred[TOP]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the top |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[TOP]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[TOP]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case PRED_8x16: |
| /* Directional prediction for a 8x16 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[TOP_R]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top right subMB is same as |
| the reference frame used by the current block then MV |
| predictor to be used for the current block is same as the MV |
| of the left subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case B_DIRECT_SPATIAL: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| |
| ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| |
| ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| { |
| u1_direct_zero_pred_flag = 1; |
| ps_mv_final_pred->i1_ref_frame[0] = 0; |
| ps_mv_final_pred->i1_ref_frame[1] = 0; |
| } |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[0], 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[1], 1, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| break; |
| case MB_SKIP: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| LEFT_MB_AVAILABLE_MASK); |
| u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| TOP_MB_AVAILABLE_MASK); |
| if(((u1_a_in * u1_b_in) == 0) |
| || ((ps_mv_pred[LEFT]->i2_mv[0] |
| | ps_mv_pred[LEFT]->i2_mv[1] |
| | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| == 0) |
| || ((ps_mv_pred[TOP]->i2_mv[0] |
| | ps_mv_pred[TOP]->i2_mv[1] |
| | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| == 0)) |
| { |
| ps_mv_final_pred->i2_mv[0] = 0; |
| ps_mv_final_pred->i2_mv[1] = 0; |
| break; |
| } |
| /* If the condition above is not true calculate the MV predictor |
| according to the process defined in sec 8.4.1.2.1 */ |
| default: |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, u1_ref_idx, uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| break; |
| } |
| } |
| return (u1_direct_zero_pred_flag); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_mvpred_nonmbaff */ |
| /* */ |
| /* Description : This function calculates the motion vector predictor, */ |
| /* for all the slice types other than B_SLICE */ |
| /* Inputs : <What inputs does the function take?> */ |
| /* Globals : None */ |
| /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| /* and based on the type of Mb the prediction is */ |
| /* appropriately done */ |
| /* Outputs : populates ps_mv_final_pred structure */ |
| /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| /* decodeSpatialdirect() */ |
| /* */ |
| /* Issues : <List any issues or problems with this function> */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 03 05 2005 TA First Draft */ |
| /* */ |
| /*****************************************************************************/ |
| #if(!MVPRED_NONMBAFF) |
| UWORD8 ih264d_mvpred_nonmbaff(dec_struct_t *ps_dec, |
| dec_mb_info_t *ps_cur_mb_info, |
| mv_pred_t *ps_mv_nmb, |
| mv_pred_t *ps_mv_ntop, |
| mv_pred_t *ps_mv_final_pred, |
| UWORD8 u1_sub_mb_num, |
| UWORD8 uc_mb_part_width, |
| UWORD8 u1_lx_start, |
| UWORD8 u1_lxend, |
| UWORD8 u1_mb_mc_mode) |
| { |
| UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| mv_pred_t *ps_mv_pred[3]; |
| UWORD8 u1_ref_idx; |
| UWORD8 u1_direct_zero_pred_flag = 0; |
| UNUSED(u1_lx_start); |
| UNUSED(u1_lxend); |
| ih264d_non_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, |
| ps_dec, uc_mb_part_width, ps_cur_mb_info); |
| |
| u1_ref_idx = ps_mv_final_pred->i1_ref_frame[0]; |
| |
| switch(u1_mb_mc_mode) |
| { |
| case PRED_16x8: |
| /* Directional prediction for a 16x8 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| /* Calculating the MV pred for the top 16x8 block */ |
| if(ps_mv_pred[TOP]->i1_ref_frame[0] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the top |
| subMB */ |
| |
| ps_mv_final_pred->i2_mv[0] = ps_mv_pred[TOP]->i2_mv[0]; |
| ps_mv_final_pred->i2_mv[1] = ps_mv_pred[TOP]->i2_mv[1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[0] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| |
| ps_mv_final_pred->i2_mv[0] = ps_mv_pred[LEFT]->i2_mv[0]; |
| ps_mv_final_pred->i2_mv[1] = ps_mv_pred[LEFT]->i2_mv[1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case PRED_8x16: |
| /* Directional prediction for a 8x16 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[0] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| |
| ps_mv_final_pred->i2_mv[0] = ps_mv_pred[LEFT]->i2_mv[0]; |
| ps_mv_final_pred->i2_mv[1] = ps_mv_pred[LEFT]->i2_mv[1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[TOP_R]->i1_ref_frame[0] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top right subMB is same as |
| the reference frame used by the current block then MV |
| predictor to be used for the current block is same as the MV |
| of the left subMB */ |
| |
| ps_mv_final_pred->i2_mv[0] = ps_mv_pred[TOP_R]->i2_mv[0]; |
| ps_mv_final_pred->i2_mv[1] = ps_mv_pred[TOP_R]->i2_mv[1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case B_DIRECT_SPATIAL: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| |
| ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| |
| ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| { |
| u1_direct_zero_pred_flag = 1; |
| ps_mv_final_pred->i1_ref_frame[0] = 0; |
| ps_mv_final_pred->i1_ref_frame[1] = 0; |
| } |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[0], 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[1], 1, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| break; |
| case MB_SKIP: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| LEFT_MB_AVAILABLE_MASK); |
| u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| TOP_MB_AVAILABLE_MASK); |
| if(((u1_a_in * u1_b_in) == 0) |
| || ((ps_mv_pred[LEFT]->i2_mv[0] |
| | ps_mv_pred[LEFT]->i2_mv[1] |
| | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| == 0) |
| || ((ps_mv_pred[TOP]->i2_mv[0] |
| | ps_mv_pred[TOP]->i2_mv[1] |
| | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| == 0)) |
| { |
| |
| ps_mv_final_pred->i2_mv[0] = 0; |
| ps_mv_final_pred->i2_mv[1] = 0; |
| break; |
| } |
| /* If the condition above is not true calculate the MV predictor |
| according to the process defined in sec 8.4.1.2.1 */ |
| default: |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, u1_ref_idx, 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| break; |
| } |
| |
| return (u1_direct_zero_pred_flag); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_mvpred_mbaff */ |
| /* */ |
| /* Description : This function calculates the motion vector predictor, */ |
| /* Inputs : <What inputs does the function take?> */ |
| /* Globals : None */ |
| /* Processing : The neighbours A(Left),B(Top),C(TopRight) are calculated */ |
| /* and based on the type of Mb the prediction is */ |
| /* appropriately done */ |
| /* Outputs : populates ps_mv_final_pred structure */ |
| /* Returns : u1_direct_zero_pred_flag which is used only in */ |
| /* decodeSpatialdirect() */ |
| /* */ |
| /* Issues : <List any issues or problems with this function> */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 03 05 2005 TA First Draft */ |
| /* */ |
| /*****************************************************************************/ |
| |
| UWORD8 ih264d_mvpred_mbaff(dec_struct_t *ps_dec, |
| dec_mb_info_t *ps_cur_mb_info, |
| mv_pred_t *ps_mv_nmb, |
| mv_pred_t *ps_mv_ntop, |
| mv_pred_t *ps_mv_final_pred, |
| UWORD8 u1_sub_mb_num, |
| UWORD8 uc_mb_part_width, |
| UWORD8 u1_lx_start, |
| UWORD8 u1_lxend, |
| UWORD8 u1_mb_mc_mode) |
| { |
| UWORD8 u1_a_in, u1_b_in, uc_temp1, uc_temp2, uc_temp3; |
| mv_pred_t *ps_mv_pred[3], s_mvPred[3]; |
| UWORD8 uc_B2, pu0_scale[3], i, uc_lx, u1_ref_idx; |
| UWORD8 u1_direct_zero_pred_flag = 0; |
| |
| pu0_scale[0] = pu0_scale[1] = pu0_scale[2] = 0; |
| ih264d_mbaff_mv_pred(ps_mv_pred, u1_sub_mb_num, ps_mv_nmb, ps_mv_ntop, ps_dec, |
| uc_mb_part_width, ps_cur_mb_info, pu0_scale); |
| for(i = 0; i < 3; i++) |
| { |
| if(pu0_scale[i] != 0) |
| { |
| memcpy(&s_mvPred[i], ps_mv_pred[i], sizeof(mv_pred_t)); |
| if(pu0_scale[i] == 1) |
| { |
| s_mvPred[i].i1_ref_frame[0] = s_mvPred[i].i1_ref_frame[0] << 1; |
| s_mvPred[i].i1_ref_frame[1] = s_mvPred[i].i1_ref_frame[1] << 1; |
| s_mvPred[i].i2_mv[1] = SIGN_POW2_DIV(s_mvPred[i].i2_mv[1], 1); |
| s_mvPred[i].i2_mv[3] = SIGN_POW2_DIV(s_mvPred[i].i2_mv[3], 1); |
| } |
| else |
| { |
| s_mvPred[i].i1_ref_frame[0] = s_mvPred[i].i1_ref_frame[0] >> 1; |
| s_mvPred[i].i1_ref_frame[1] = s_mvPred[i].i1_ref_frame[1] >> 1; |
| s_mvPred[i].i2_mv[1] = s_mvPred[i].i2_mv[1] << 1; |
| s_mvPred[i].i2_mv[3] = s_mvPred[i].i2_mv[3] << 1; |
| } |
| ps_mv_pred[i] = &s_mvPred[i]; |
| } |
| } |
| |
| for(uc_lx = u1_lx_start; uc_lx < u1_lxend; uc_lx++) |
| { |
| u1_ref_idx = ps_mv_final_pred->i1_ref_frame[uc_lx]; |
| uc_B2 = (uc_lx << 1); |
| switch(u1_mb_mc_mode) |
| { |
| case PRED_16x8: |
| /* Directional prediction for a 16x8 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| /* Calculating the MV pred for the top 16x8 block */ |
| if(ps_mv_pred[TOP]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the top |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[TOP]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[TOP]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case PRED_8x16: |
| /* Directional prediction for a 8x16 MB partition */ |
| if(u1_sub_mb_num == 0) |
| { |
| if(ps_mv_pred[LEFT]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the left subMB is same as the |
| reference frame used by the current block then MV predictor to |
| be used for the current block is same as the MV of the left |
| subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[LEFT]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| else |
| { |
| if(ps_mv_pred[TOP_R]->i1_ref_frame[uc_lx] == u1_ref_idx) |
| { |
| /* If the reference frame used by the top right subMB is same as |
| the reference frame used by the current block then MV |
| predictor to be used for the current block is same as the MV |
| of the left subMB */ |
| ps_mv_final_pred->i2_mv[uc_B2 + 0] = |
| ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 0]; |
| ps_mv_final_pred->i2_mv[uc_B2 + 1] = |
| ps_mv_pred[TOP_R]->i2_mv[uc_B2 + 1]; |
| } |
| else |
| { |
| /* The MV predictor is calculated according to the process |
| defined in 8.4.1.2.1 */ |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, |
| ps_mv_pred, |
| u1_ref_idx, |
| uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| } |
| } |
| break; |
| case B_DIRECT_SPATIAL: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[0]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[0]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[0]; |
| |
| ps_mv_final_pred->i1_ref_frame[0] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| uc_temp1 = (UWORD8)ps_mv_pred[LEFT]->i1_ref_frame[1]; |
| uc_temp2 = (UWORD8)ps_mv_pred[TOP]->i1_ref_frame[1]; |
| uc_temp3 = (UWORD8)ps_mv_pred[TOP_R]->i1_ref_frame[1]; |
| |
| ps_mv_final_pred->i1_ref_frame[1] = MIN(uc_temp1, |
| MIN(uc_temp2, uc_temp3)); |
| |
| /* If the reference indices are negative clip the scaled reference indices to -1 */ |
| /* i.e invalid reference index */ |
| |
| /*if(ps_mv_final_pred->i1_ref_frame[0] < 0) |
| ps_mv_final_pred->i1_ref_frame[0] = -1; |
| |
| if(ps_mv_final_pred->i1_ref_frame[1] < 0) |
| ps_mv_final_pred->i1_ref_frame[1] = -1; */ |
| |
| if((ps_mv_final_pred->i1_ref_frame[0] < 0) |
| && (ps_mv_final_pred->i1_ref_frame[1] < 0)) |
| { |
| u1_direct_zero_pred_flag = 1; |
| ps_mv_final_pred->i1_ref_frame[0] = 0; |
| ps_mv_final_pred->i1_ref_frame[1] = 0; |
| } |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[0], 0, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, |
| ps_mv_final_pred->i1_ref_frame[1], 1, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| |
| break; |
| case MB_SKIP: |
| /* Case when the MB has been skipped */ |
| /* If either of left or the top subMB is not present |
| OR |
| If both the MV components of either the left or the top subMB are |
| zero and their reference frame pointer pointing to 0 |
| then MV for the skipped MB is zero |
| else the Median of the mv_pred_t is used */ |
| u1_a_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| LEFT_MB_AVAILABLE_MASK); |
| u1_b_in = (ps_cur_mb_info->u1_mb_ngbr_availablity & |
| TOP_MB_AVAILABLE_MASK); |
| if(((u1_a_in * u1_b_in) == 0) |
| || ((ps_mv_pred[LEFT]->i2_mv[0] |
| | ps_mv_pred[LEFT]->i2_mv[1] |
| | ps_mv_pred[LEFT]->i1_ref_frame[0]) |
| == 0) |
| || ((ps_mv_pred[TOP]->i2_mv[0] |
| | ps_mv_pred[TOP]->i2_mv[1] |
| | ps_mv_pred[TOP]->i1_ref_frame[0]) |
| == 0)) |
| { |
| ps_mv_final_pred->i2_mv[0] = 0; |
| ps_mv_final_pred->i2_mv[1] = 0; |
| break; |
| } |
| /* If the condition above is not true calculate the MV predictor |
| according to the process defined in sec 8.4.1.2.1 */ |
| default: |
| ih264d_get_motion_vector_predictor( |
| ps_mv_final_pred, ps_mv_pred, u1_ref_idx, uc_lx, |
| (const UWORD8 *)gau1_ih264d_mv_pred_condition); |
| break; |
| } |
| } |
| return (u1_direct_zero_pred_flag); |
| } |
| |
| |
| |
| |
| void ih264d_rep_mv_colz(dec_struct_t *ps_dec, |
| mv_pred_t *ps_mv_pred_src, |
| mv_pred_t *ps_mv_pred_dst, |
| UWORD8 u1_sub_mb_num, |
| UWORD8 u1_colz, |
| UWORD8 u1_ht, |
| UWORD8 u1_wd) |
| { |
| |
| UWORD8 k, m; |
| UWORD8 *pu1_colz = ps_dec->pu1_col_zero_flag + ps_dec->i4_submb_ofst |
| + u1_sub_mb_num; |
| |
| for(k = 0; k < u1_ht; k++) |
| { |
| for(m = 0; m < u1_wd; m++) |
| { |
| *(ps_mv_pred_dst + m) = *(ps_mv_pred_src); |
| *(pu1_colz + m) = u1_colz; |
| |
| } |
| pu1_colz += SUB_BLK_WIDTH; |
| ps_mv_pred_dst += SUB_BLK_WIDTH; |
| } |
| } |
| |
