/****************************************************************************** * * Copyright (C) 2018 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 * ihevce_deblk.c * * @brief * Contains definition for the ctb level deblk function * * @author * ittiam * * @List of Functions: * ihevce_deblk_populate_qp_map() * ihevce_deblk_ctb() * ihevce_hbd_deblk_ctb() * * @remarks * None * ******************************************************************************* */ /*****************************************************************************/ /* File Includes */ /*****************************************************************************/ /* System include files */ #include #include #include #include #include #include /* User include files */ #include "ihevc_typedefs.h" #include "itt_video_api.h" #include "ihevce_api.h" #include "rc_cntrl_param.h" #include "rc_frame_info_collector.h" #include "rc_look_ahead_params.h" #include "ihevc_defs.h" #include "ihevc_debug.h" #include "ihevc_structs.h" #include "ihevc_platform_macros.h" #include "ihevc_deblk.h" #include "ihevc_deblk_tables.h" #include "ihevc_common_tables.h" #include "ihevc_itrans_recon.h" #include "ihevc_chroma_itrans_recon.h" #include "ihevc_chroma_intra_pred.h" #include "ihevc_intra_pred.h" #include "ihevc_inter_pred.h" #include "ihevc_mem_fns.h" #include "ihevc_padding.h" #include "ihevc_weighted_pred.h" #include "ihevc_sao.h" #include "ihevc_resi_trans.h" #include "ihevc_quant_iquant_ssd.h" #include "ihevc_cabac_tables.h" #include "ihevce_defs.h" #include "ihevce_hle_interface.h" #include "ihevce_lap_enc_structs.h" #include "ihevce_multi_thrd_structs.h" #include "ihevce_me_common_defs.h" #include "ihevce_had_satd.h" #include "ihevce_error_codes.h" #include "ihevce_bitstream.h" #include "ihevce_cabac.h" #include "ihevce_rdoq_macros.h" #include "ihevce_function_selector.h" #include "ihevce_enc_structs.h" #include "ihevce_entropy_structs.h" #include "ihevce_cmn_utils_instr_set_router.h" #include "ihevce_enc_loop_structs.h" #include "ihevce_common_utils.h" #include "ihevce_global_tables.h" #include "ihevce_deblk.h" #include "ihevce_tile_interface.h" /*****************************************************************************/ /* Function Definitions */ /*****************************************************************************/ /*! ****************************************************************************** * \if Function name : ihevce_deblk_populate_qp_map \endif * * \brief * * ***************************************************************************** */ void ihevce_deblk_populate_qp_map( ihevce_enc_loop_ctxt_t *ps_ctxt, deblk_ctbrow_prms_t *ps_deblk_ctb_row_params, ctb_enc_loop_out_t *ps_ctb_out_dblk, WORD32 vert_ctr, frm_ctb_ctxt_t *ps_frm_ctb_prms, ihevce_tile_params_t *ps_col_tile_params) { ctb_enc_loop_out_t *ps_ctb_out; WORD32 ctb_ctr, ctb_start, ctb_end; WORD32 tile_qp_offset, tile_qp_size, i4_offset_for_last_cu_qp; /* Create the Qp map for the entire current CTB-row for deblocking purpose(only)*/ /* Do this iff cur pic is referred or recon dump is enabled or psnr calc is on*/ /*Qp of the last CU of previous CTB row*/ WORD8 i1_last_cu_qp; /*A pointer pointing to the top 4x4 block's Qp for all CTb rows*/ WORD8 *pi1_qp_top_4x4_ctb_row = ps_deblk_ctb_row_params->api1_qp_top_4x4_ctb_row[ps_ctxt->i4_enc_frm_id] + (ps_deblk_ctb_row_params->u4_qp_top_4x4_buf_size * ps_ctxt->i4_bitrate_instance_num); UWORD32 u4_qp_top_4x4_buf_strd = ps_deblk_ctb_row_params->u4_qp_top_4x4_buf_strd; /*The Qp map which has to be populated*/ UWORD32 u4_qp_buffer_stride = ps_deblk_ctb_row_params->u4_qp_buffer_stride; WORD8 *pi1_ctb_tile_qp = ps_deblk_ctb_row_params->pi1_ctb_row_qp; /*Temporary pointers to Qp map at CTB level*/ WORD8 *pi1_ctb_qp_map_tile; i4_offset_for_last_cu_qp = ps_ctxt->pi4_offset_for_last_cu_qp[ps_ctxt->i4_tile_col_idx]; /* total QPs to be copied for current row is : */ tile_qp_size = i4_offset_for_last_cu_qp + 1; /*Pointing to the first CTB of current CTB row*/ ps_ctb_out = ps_ctb_out_dblk; /* Offset req. for the row QP to the tile start */ tile_qp_offset = ps_col_tile_params->i4_first_ctb_x * (ps_frm_ctb_prms->i4_ctb_size / 4); ctb_start = ps_col_tile_params->i4_first_ctb_x; ctb_end = (ps_col_tile_params->i4_first_ctb_x + ps_col_tile_params->i4_curr_tile_wd_in_ctb_unit); if(vert_ctr) /*Not first CTB row of frame*/ { /*copy from top4x4_array data stored by upper CTB-row to qp-map*/ memcpy( pi1_ctb_tile_qp, (pi1_qp_top_4x4_ctb_row + (vert_ctr - 1) * u4_qp_top_4x4_buf_strd + tile_qp_offset), tile_qp_size); } /*pu1_ctb_row_qp points to top4x4 row in Qp-map. Now pointing pu1_ctb_qp_map to cur 4x4 row*/ pi1_ctb_qp_map_tile = pi1_ctb_tile_qp + u4_qp_buffer_stride; /* This i1_last_cu_qp will be conditionally overwritten later */ i1_last_cu_qp = ps_ctxt->i4_frame_qp; /* -- Loop over all the CTBs in a CTB-row for populating the Qp-map ----- */ for(ctb_ctr = ctb_start; ctb_ctr < ctb_end; ctb_ctr++) { WORD32 cu_ctr; cu_enc_loop_out_t *ps_curr_cu; /* Update i1_last_cu_qp based on CTB's position in tile */ update_last_coded_cu_qp( (ps_deblk_ctb_row_params->pi1_ctb_row_qp + i4_offset_for_last_cu_qp), ps_ctxt->i1_entropy_coding_sync_enabled_flag, ps_frm_ctb_prms, ps_ctxt->i4_frame_qp, vert_ctr, ctb_ctr, &i1_last_cu_qp); /* store the pointer of first cu of current ctb */ ps_curr_cu = ps_ctb_out->ps_enc_cu; /* --------- loop over all the CUs in the CTB --------------- */ for(cu_ctr = 0; cu_ctr < ps_ctb_out->u1_num_cus_in_ctb; cu_ctr++) { UWORD8 u1_vert_4x4, u1_horz_4x4; //for_loop counters WORD8 *pi1_cu_qp_map; WORD8 i1_qp, i1_qp_left, i1_qp_top; pi1_cu_qp_map = pi1_ctb_qp_map_tile + (ps_curr_cu->b3_cu_pos_y * 2) * u4_qp_buffer_stride + (ps_curr_cu->b3_cu_pos_x * 2); /*If the current CU is coded in skip_mode/zero_CBF then for deblocking, Qp of the previously coded CU will be used*/ if(ps_curr_cu->b1_skip_flag || ps_curr_cu->b1_no_residual_syntax_flag) { if(0 == ps_curr_cu->b3_cu_pos_x) i1_qp_left = i1_last_cu_qp; else i1_qp_left = *(pi1_cu_qp_map - 1); if(0 == ps_curr_cu->b3_cu_pos_y) i1_qp_top = i1_last_cu_qp; else i1_qp_top = *(pi1_cu_qp_map - u4_qp_buffer_stride); i1_qp = (i1_qp_left + i1_qp_top + 1) / 2; if(0 == ps_curr_cu->b1_first_cu_in_qg) { i1_qp = i1_last_cu_qp; } } else { i1_qp = ps_curr_cu->i1_cu_qp; } i1_last_cu_qp = i1_qp; /*---- Loop for populating Qp map for the current CU -------*/ for(u1_vert_4x4 = 0; u1_vert_4x4 < (ps_curr_cu->b4_cu_size * 2); u1_vert_4x4++) { for(u1_horz_4x4 = 0; u1_horz_4x4 < (ps_curr_cu->b4_cu_size * 2); u1_horz_4x4++) { pi1_cu_qp_map[u1_horz_4x4] = i1_qp; } pi1_cu_qp_map += u4_qp_buffer_stride; } /*Update Qp-map ptr. Qp map is at 4x4 level but b4_cu_size is at 8x8 level*/ ps_curr_cu++; } pi1_ctb_qp_map_tile += (ps_frm_ctb_prms->i4_ctb_size / 4); //one qp per 4x4 block. ps_ctb_out++; } //for(ctb_ctr = 0; ctb_ctr < num_ctbs_horz; ctb_ctr++) /*fill into the top4x4_array Qp for the lower CTB-row from bottom part of cur CTB row*/ memcpy( (pi1_qp_top_4x4_ctb_row + vert_ctr * u4_qp_top_4x4_buf_strd + tile_qp_offset), (pi1_ctb_tile_qp + (ps_frm_ctb_prms->i4_ctb_size / 4) * u4_qp_buffer_stride), tile_qp_size); } /** ******************************************************************************* * * @brief * Deblock CTB level function. * * @par Description: * For a given CTB, deblocking on both vertical and * horizontal edges is done. Both the luma and chroma * blocks are processed * * @param[in] * ps_deblk: Pointer to the deblock context * last_col: if the CTB is the last CTB of current CTB-row value is 1 else 0 * ps_deblk_ctb_row_params: deblk ctb row params * * @returns * * @remarks * None * ******************************************************************************* */ void ihevce_deblk_ctb( deblk_ctb_params_t *ps_deblk, WORD32 last_col, deblk_ctbrow_prms_t *ps_deblk_ctb_row_params) { WORD32 ctb_size; UWORD32 u4_bs; WORD32 bs_lz; /*Leading zeros in boundary strength*/ WORD32 qp_p, qp_q; UWORD8 *pu1_src; UWORD8 *pu1_src_uv; UWORD8 *pu1_curr_src; WORD32 col_size; WORD32 col, row, i4_edge_count; WORD32 num_columns_for_vert_filt; WORD32 num_blks_for_vert_filt; WORD32 num_rows_for_horz_filt; ihevc_deblk_chroma_horz_ft *pf_deblk_chroma_horz; ihevc_deblk_chroma_horz_ft *pf_deblk_chroma_vert; /* Filter flags are packed along with the qp info. 6 out of the 8 bits correspond to qp and 1 to filter flag. */ /* filter_p and filter_q are initialized to 1. They are to be extracted along with the qp info. */ WORD32 filter_p, filter_q; WORD8 *pi1_ctb_row_qp_p, *pi1_ctb_row_qp_temp; WORD8 *pi1_ctb_row_qp_q; func_selector_t *ps_func_slector = ps_deblk->ps_func_selector; WORD32 left_luma_edge_filter_flag = ps_deblk->i4_deblock_left_ctb_edge; WORD32 top_luma_edge_filter_flag = ps_deblk->i4_deblock_top_ctb_edge; WORD32 left_chroma_edge_filter_flag = ps_deblk->i4_deblock_left_ctb_edge; WORD32 top_chroma_edge_filter_flag = ps_deblk->i4_deblock_top_ctb_edge; UWORD32 *bs_vert = ps_deblk_ctb_row_params->pu4_ctb_row_bs_vert; UWORD32 *bs_horz = ps_deblk_ctb_row_params->pu4_ctb_row_bs_horz; UWORD32 *bs_vert_uv = bs_vert; UWORD32 *bs_horz_uv = bs_horz; UWORD32 u4_qp_buffer_stride = ps_deblk_ctb_row_params->u4_qp_buffer_stride; UWORD8 u1_is_422 = (ps_deblk->u1_chroma_array_type == 2); if(u1_is_422) { pf_deblk_chroma_horz = ps_func_slector->ihevc_deblk_422chroma_horz_fptr; pf_deblk_chroma_vert = ps_func_slector->ihevc_deblk_422chroma_vert_fptr; } else { pf_deblk_chroma_horz = ps_func_slector->ihevc_deblk_chroma_horz_fptr; pf_deblk_chroma_vert = ps_func_slector->ihevc_deblk_chroma_vert_fptr; } ctb_size = ps_deblk->i4_ctb_size; /* The PCM filter flag and bypass trans flag are always set to 1 in encoder profile */ /* Can be removed during optimization */ filter_q = 1; filter_p = 1; ////////////////////////////////////////////////////////////////////////////// /* Luma Veritcal Edge */ pu1_src = ps_deblk->pu1_ctb_y; pi1_ctb_row_qp_temp = ps_deblk_ctb_row_params->pi1_ctb_row_qp + u4_qp_buffer_stride; num_columns_for_vert_filt = ctb_size / 8; num_blks_for_vert_filt = ctb_size / 4; for(i4_edge_count = 0; i4_edge_count < num_columns_for_vert_filt; i4_edge_count++) { u4_bs = *bs_vert; /* get the current 4x4 vertical pointer */ pu1_curr_src = pu1_src; pi1_ctb_row_qp_q = pi1_ctb_row_qp_temp + (i4_edge_count << 1); /* If the current edge is not the 1st edge of frame or slice */ if(1 == left_luma_edge_filter_flag) { for(row = 0; row < num_blks_for_vert_filt;) { bs_lz = CLZ(u4_bs) >> 1; /* If BS = 0, skip the egde filtering */ if(0 != bs_lz) { u4_bs = u4_bs << (bs_lz << 1); pu1_curr_src += ((bs_lz << 2) * ps_deblk->i4_luma_pic_stride); pi1_ctb_row_qp_q += (bs_lz * u4_qp_buffer_stride); row += bs_lz; continue; } qp_p = *(pi1_ctb_row_qp_q - 1); qp_q = *pi1_ctb_row_qp_q; ps_func_slector->ihevc_deblk_luma_vert_fptr( pu1_curr_src, ps_deblk->i4_luma_pic_stride, (u4_bs >> 30), /* bits 31 and 30 are extracted */ qp_p, qp_q, ps_deblk->i4_beta_offset_div2, ps_deblk->i4_tc_offset_div2, filter_p, filter_q); u4_bs = u4_bs << 2; pu1_curr_src += (ps_deblk->i4_luma_pic_stride << 2); pi1_ctb_row_qp_q += u4_qp_buffer_stride; row++; } } /* Increment the boundary strength and src pointer for the next column */ bs_vert += 1; pu1_src += 8; /* Enable for the next edges of ctb*/ left_luma_edge_filter_flag = 1; } ////////////////////////////////////////////////////////////////////////////// /* Chroma Veritcal Edge */ pu1_src_uv = ps_deblk->pu1_ctb_uv; pi1_ctb_row_qp_temp = ps_deblk_ctb_row_params->pi1_ctb_row_qp + u4_qp_buffer_stride; /* Column spacing is 4 for each chroma component */ /* and hence 8 when they are interleaved. */ /* But, only those columns with a x co-ordinate */ /* that is divisiblee by 8 are filtered */ /* Hence, denominator is 16 */ num_columns_for_vert_filt = ctb_size / 16; /* blk_size is 4 and chroma_ctb_height is ctb_size/2 */ num_blks_for_vert_filt = (0 == u1_is_422) ? (ctb_size / 2) / 4 : (ctb_size) / 4; for(i4_edge_count = 0; i4_edge_count < num_columns_for_vert_filt; i4_edge_count++) { /* Every alternate boundary strength value is used for 420 chroma */ u4_bs = *(bs_vert_uv) & ((0 == u1_is_422) ? 0x88888888 : 0xaaaaaaaa); pu1_curr_src = pu1_src_uv; pi1_ctb_row_qp_q = pi1_ctb_row_qp_temp + (i4_edge_count << 2); /* If the current edge is not the 1st edge of frame or slice */ if(1 == left_chroma_edge_filter_flag) { /* Each 'bs' is 2 bits long */ /* The divby4 in 420 is */ /* necessitated by the fact that */ /* chroma ctb_ht is half that of luma */ WORD32 i4_log2_num_bits_per_bs = ((0 == u1_is_422) + 1); /* i4_sub_heightC = 2 for 420 */ /* i4_sub_heightC = 1 for 422 */ WORD32 i4_sub_heightC = i4_log2_num_bits_per_bs; for(row = 0; row < num_blks_for_vert_filt;) { bs_lz = CLZ(u4_bs) >> i4_log2_num_bits_per_bs; /* If BS = 0, skip the egde filtering */ if(0 != bs_lz) { row += bs_lz; u4_bs = u4_bs << (bs_lz << i4_log2_num_bits_per_bs); /* '<<2' because of blk_size being 4x4 */ pu1_curr_src += ((bs_lz << 2) * ps_deblk->i4_chroma_pic_stride); /* In 420, every alternate QP row is skipped, because chroma height */ /* In 422, no row is skipped */ pi1_ctb_row_qp_q += ((u4_qp_buffer_stride << (i4_sub_heightC - 1)) * bs_lz); continue; } qp_p = *(pi1_ctb_row_qp_q - i4_sub_heightC); qp_q = *pi1_ctb_row_qp_q; pf_deblk_chroma_vert( pu1_curr_src, ps_deblk->i4_chroma_pic_stride, qp_p, qp_q, ps_deblk->i4_cb_qp_indx_offset, ps_deblk->i4_cr_qp_indx_offset, ps_deblk->i4_tc_offset_div2, filter_p, filter_q); u4_bs = u4_bs << (1 << i4_log2_num_bits_per_bs); pu1_curr_src += (ps_deblk->i4_chroma_pic_stride << 2); pi1_ctb_row_qp_q += (u4_qp_buffer_stride << (i4_sub_heightC - 1)); row++; } } /* Increment the boundary strength by 2 and src pointer for the next column */ /* As the edge filtering happens for alternate column */ bs_vert_uv += 2; pu1_src_uv += 16; left_chroma_edge_filter_flag = 1; } ////////////////////////////////////////////////////////////////////////////// /* Luma Horizontal Edge */ pu1_src = ps_deblk->pu1_ctb_y; col_size = ctb_size / 4; /* If the ctb is the 1st ctb of row, */ /* Decrement the loop count to exclude filtering of last 4 pixels */ /* else shift the src pointer by 4 pixels to do filtering for shifted ctb */ if(ps_deblk->i4_deblock_left_ctb_edge == 1) { pu1_src -= 4; /*If the ctb is at the horizonatl end of PIC*/ /* Increase the column size to filter last 4 pixels */ col_size += last_col; } else if(!last_col) { col_size -= 1; } { UWORD8 *pu1_src_temp = pu1_src; //pu1_ctb_row_qp_p and pu1_ctb_row_qp_q point to alternate rows pi1_ctb_row_qp_p = ps_deblk_ctb_row_params->pi1_ctb_row_qp; num_rows_for_horz_filt = ctb_size / 8; for(i4_edge_count = 0; i4_edge_count < num_rows_for_horz_filt; i4_edge_count++) { WORD32 col_size_temp = col_size; pi1_ctb_row_qp_q = pi1_ctb_row_qp_p + u4_qp_buffer_stride; pu1_src = pu1_src_temp + (i4_edge_count * 8 * ps_deblk->i4_luma_pic_stride); if(1 == top_luma_edge_filter_flag) { //Deblock the last vertical_4x4_column of previous CTB if(ps_deblk->i4_deblock_left_ctb_edge == 1) { u4_bs = ps_deblk->au1_prev_bs[i4_edge_count] & 0x3; if(u4_bs != 0) { qp_p = *(pi1_ctb_row_qp_p - 1); qp_q = *(pi1_ctb_row_qp_q - 1); ps_func_slector->ihevc_deblk_luma_horz_fptr( pu1_src, ps_deblk->i4_luma_pic_stride, u4_bs, qp_p, qp_q, ps_deblk->i4_beta_offset_div2, ps_deblk->i4_tc_offset_div2, 1, 1); } pu1_src += 4; col_size_temp--; } //Start deblocking current CTB u4_bs = *(bs_horz); for(col = 0; col < col_size_temp;) { bs_lz = CLZ(u4_bs) >> 1; if(0 != bs_lz) { u4_bs = u4_bs << (bs_lz << 1); pu1_src += 4 * bs_lz; col += bs_lz; continue; } qp_p = *(pi1_ctb_row_qp_p + col); qp_q = *(pi1_ctb_row_qp_q + col); ps_func_slector->ihevc_deblk_luma_horz_fptr( pu1_src, ps_deblk->i4_luma_pic_stride, u4_bs >> (sizeof(u4_bs) * 8 - 2), qp_p, qp_q, ps_deblk->i4_beta_offset_div2, ps_deblk->i4_tc_offset_div2, filter_p, filter_q); pu1_src += 4; u4_bs = u4_bs << 2; col++; } //Store the last vertical_4x4 column of CTB's info for next CTB deblocking u4_bs = *bs_horz; ps_deblk->au1_prev_bs[i4_edge_count] = (UWORD8)(((u4_bs << ((ctb_size >> 1) - 2))) >> 30); } bs_horz += 1; pi1_ctb_row_qp_p += (u4_qp_buffer_stride << 1); top_luma_edge_filter_flag = 1; } } ////////////////////////////////////////////////////////////////////////////// /* Chroma Horizontal Edge */ pu1_src_uv = ps_deblk->pu1_ctb_uv; col_size = ctb_size / 8; /* If the ctb is the 1st ctb of row, */ /* Decrement the loop count to exclude filtering of last 4 pixels */ /* else shift the src pointer by 8 (uv) pixels to do filtering for shifted ctb */ if(ps_deblk->i4_deblock_left_ctb_edge == 1) { pu1_src_uv -= 8; /*If the ctb is at the horizonatl end of PIC*/ /* Increase the column size to filter last 8 (uv) pixels */ col_size += last_col; } else if(!last_col) { col_size--; } { UWORD8 *pu1_src_temp = pu1_src_uv; //pu1_ctb_row_qp_p and pu1_ctb_row_qp_q point to alternate rows pi1_ctb_row_qp_p = ps_deblk_ctb_row_params->pi1_ctb_row_qp; num_rows_for_horz_filt = ctb_size / ((0 == u1_is_422) ? 16 : 8); for(i4_edge_count = 0; i4_edge_count < num_rows_for_horz_filt; i4_edge_count++) { WORD32 col_size_temp = col_size; pi1_ctb_row_qp_q = pi1_ctb_row_qp_p + u4_qp_buffer_stride; pu1_src_uv = pu1_src_temp + (i4_edge_count * 8 * ps_deblk->i4_chroma_pic_stride); if(1 == top_chroma_edge_filter_flag) { //Deblock the last vertical _4x4_column of previous CTB if(ps_deblk->i4_deblock_left_ctb_edge == 1) { u4_bs = ps_deblk->au1_prev_bs_uv[i4_edge_count] & 0x2; if(u4_bs == 2) { qp_p = *(pi1_ctb_row_qp_p - 1); qp_q = *(pi1_ctb_row_qp_q - 1); pf_deblk_chroma_horz( pu1_src_uv, ps_deblk->i4_chroma_pic_stride, qp_p, qp_q, ps_deblk->i4_cb_qp_indx_offset, ps_deblk->i4_cr_qp_indx_offset, ps_deblk->i4_tc_offset_div2, 1, 1); } pu1_src_uv += 8; col_size_temp--; } //Start deblocking current CTB u4_bs = *(bs_horz_uv)&0x88888888; for(col = 0; col < col_size_temp;) { bs_lz = CLZ(u4_bs) >> 2; if(0 != bs_lz) { u4_bs = u4_bs << (bs_lz << 2); pu1_src_uv += (8 * bs_lz); col += bs_lz; continue; } qp_p = *(pi1_ctb_row_qp_p + (col << 1)); qp_q = *(pi1_ctb_row_qp_q + (col << 1)); pf_deblk_chroma_horz( pu1_src_uv, ps_deblk->i4_chroma_pic_stride, qp_p, qp_q, ps_deblk->i4_cb_qp_indx_offset, ps_deblk->i4_cr_qp_indx_offset, ps_deblk->i4_tc_offset_div2, filter_p, filter_q); pu1_src_uv += 8; u4_bs = u4_bs << 4; col++; } //Store the last vertical_4x4 column of CTB's info for next CTB deblocking u4_bs = *bs_horz_uv; ps_deblk->au1_prev_bs_uv[i4_edge_count] = (UWORD8)(((u4_bs << ((ctb_size >> 1) - 4))) >> 30); } bs_horz_uv += ((0 == u1_is_422) + 1); pi1_ctb_row_qp_p += (u4_qp_buffer_stride << ((0 == u1_is_422) + 1)); top_chroma_edge_filter_flag = 1; } } return; }