ihevce_enc_cu_recursion.c - Android社区 - https://www.androidos.net.cn/

/******************************************************************************
 *
 * 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_enc_cu_recursion.c
*
* \brief
*    This file contains Encoder normative loop pass related functions
*
* \date
*    18/09/2012
*
* \author
*    Ittiam
*
*
* List of Functions
*
*
******************************************************************************
*/

/*****************************************************************************/
/* File Includes                                                             */
/*****************************************************************************/
/* System include files */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <stdarg.h>
#include <math.h>

/* 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_macros.h"
#include "ihevc_debug.h"
#include "ihevc_structs.h"
#include "ihevc_platform_macros.h"
#include "ihevc_deblk.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_multi_thrd_funcs.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_ipe_instr_set_router.h"
#include "ihevce_decomp_pre_intra_structs.h"
#include "ihevce_decomp_pre_intra_pass.h"
#include "ihevce_enc_loop_structs.h"
#include "ihevce_global_tables.h"
#include "ihevce_nbr_avail.h"
#include "ihevce_enc_loop_utils.h"
#include "ihevce_bs_compute_ctb.h"
#include "ihevce_cabac_rdo.h"
#include "ihevce_dep_mngr_interface.h"
#include "ihevce_enc_loop_pass.h"
#include "ihevce_rc_enc_structs.h"
#include "ihevce_enc_cu_recursion.h"
#include "ihevce_stasino_helpers.h"

#include "cast_types.h"
#include "osal.h"
#include "osal_defaults.h"

/*****************************************************************************/
/* Macros                                                                    */
/*****************************************************************************/
#define NUM_CTB_QUANT_ROUNDING 6

/*****************************************************************************/
/* Function Definitions                                                      */
/*****************************************************************************/

/**
*********************************************************************************
* Function name : ihevce_store_cu_final
*
* \brief
*    This function store cu info to the enc loop cu context
*
* \param[in] ps_ctxt : pointer to enc loop context structure
* \param[in] ps_cu_final  : pointer to enc loop output CU structure
* \param[in] pu1_ecd_data : ecd data pointer
* \param[in] ps_enc_out_ctxt : pointer to CU information structure
* \param[in] ps_cu_prms : pointer to  cu level parameters for SATD / RDOPT
*
* \return
*    None
*
**********************************************************************************/
void ihevce_store_cu_final(
    ihevce_enc_loop_ctxt_t *ps_ctxt,
    cu_enc_loop_out_t *ps_cu_final,
    UWORD8 *pu1_ecd_data,
    ihevce_enc_cu_node_ctxt_t *ps_enc_out_ctxt,
    enc_loop_cu_prms_t *ps_cu_prms)
{
    enc_loop_cu_final_prms_t *ps_enc_loop_bestprms;
    WORD32 i4_8x8_blks_in_cu;
    WORD32 i4_br_id, i4_enc_frm_id;

WORD32 u4_tex_bits, u4_hdr_bits;
    WORD32 i4_qscale, i4_qscale_ctb;
    ps_enc_loop_bestprms = ps_enc_out_ctxt->ps_cu_prms;
    i4_qscale = ((ps_ctxt->ps_rc_quant_ctxt->pi4_qp_to_qscale
                      [ps_enc_out_ctxt->i1_cu_qp + ps_ctxt->ps_rc_quant_ctxt->i1_qp_offset]));
    i4_qscale_ctb = ((
        ps_ctxt->ps_rc_quant_ctxt
            ->pi4_qp_to_qscale[ps_ctxt->i4_frame_mod_qp + ps_ctxt->ps_rc_quant_ctxt->i1_qp_offset]));

/* All texture bits accumulated */
    u4_tex_bits = ps_enc_loop_bestprms->u4_cu_luma_res_bits +
                  ps_enc_loop_bestprms->u4_cu_chroma_res_bits +
                  ps_enc_loop_bestprms->u4_cu_cbf_bits;

u4_hdr_bits = ps_enc_loop_bestprms->u4_cu_hdr_bits;

i4_br_id = ps_ctxt->i4_bitrate_instance_num;
    i4_enc_frm_id = ps_ctxt->i4_enc_frm_id;

i4_8x8_blks_in_cu = ((ps_enc_out_ctxt->u1_cu_size >> 3) * (ps_enc_out_ctxt->u1_cu_size >> 3));

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->i8_frame_open_loop_ssd +=
        ps_enc_loop_bestprms
            ->i8_cu_ssd;  // + (((float)(ps_ctxt->i8_cl_ssd_lambda_qf/ (1<< LAMBDA_Q_SHIFT))) * ps_enc_loop_bestprms->u4_cu_hdr_bits);

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_open_loop_intra_sad +=
        (UWORD32)(
            ps_enc_loop_bestprms->u4_cu_open_intra_sad +
            (((float)(ps_ctxt->i4_sad_lamda) / (1 << LAMBDA_Q_SHIFT)) *
             ps_enc_loop_bestprms->u4_cu_hdr_bits));

if(1 == ps_enc_loop_bestprms->u1_intra_flag)
    {
        ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_intra_sad_acc +=
            ps_enc_loop_bestprms->u4_cu_sad;
        ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->i8_frame_intra_cost_acc +=
            ps_enc_loop_bestprms->i8_best_rdopt_cost;
    }
    else
    {
        ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_inter_sad_acc +=
            ps_enc_loop_bestprms->u4_cu_sad;
        ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->i8_frame_inter_cost_acc +=
            ps_enc_loop_bestprms->i8_best_rdopt_cost;
    }
    /*accumulating the frame level stats across frame*/
    ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_sad_acc +=
        ps_enc_loop_bestprms->u4_cu_sad;

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->i8_frame_cost_acc +=
        ps_enc_loop_bestprms->i8_best_rdopt_cost;

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_rdopt_bits +=
        (u4_tex_bits + u4_hdr_bits);

/*Total bits and header bits accumalted here for CTB*/
    ps_ctxt->u4_total_cu_bits += (u4_tex_bits + u4_hdr_bits);
    ps_ctxt->u4_total_cu_bits_mul_qs +=
        ((ULWORD64)((u4_tex_bits + u4_hdr_bits) * (i4_qscale_ctb)) + (1 << (QSCALE_Q_FAC_3 - 1))) >>
        QSCALE_Q_FAC_3;
    ps_ctxt->u4_total_cu_hdr_bits += u4_hdr_bits;
    ps_ctxt->u4_cu_tot_bits_into_qscale +=
        ((ULWORD64)((u4_tex_bits + u4_hdr_bits) * (i4_qscale)) + (1 << (QSCALE_Q_FAC_3 - 1))) >>
        QSCALE_Q_FAC_3;
    ps_ctxt->u4_cu_tot_bits += (u4_tex_bits + u4_hdr_bits);

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]->u4_frame_rdopt_header_bits +=
        u4_hdr_bits;

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]
        ->i8_sad_by_qscale[ps_enc_loop_bestprms->u1_intra_flag] +=
        ((((LWORD64)ps_enc_loop_bestprms->u4_cu_sad) << SAD_BY_QSCALE_Q) / i4_qscale);

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]
        ->i4_qp_normalized_8x8_cu_sum[ps_enc_loop_bestprms->u1_intra_flag] +=
        (i4_8x8_blks_in_cu * i4_qscale);

ps_ctxt->aaps_enc_loop_rc_params[i4_enc_frm_id][i4_br_id]
        ->i4_8x8_cu_sum[ps_enc_loop_bestprms->u1_intra_flag] += i4_8x8_blks_in_cu;

/* PCM not supported */
    ps_cu_final->b1_pcm_flag = 0;
    ps_cu_final->b1_pred_mode_flag = ps_enc_loop_bestprms->u1_intra_flag;

ps_cu_final->b1_skip_flag = ps_enc_loop_bestprms->u1_skip_flag;
    ps_cu_final->b1_tq_bypass_flag = 0;
    ps_cu_final->b3_part_mode = ps_enc_loop_bestprms->u1_part_mode;

ps_cu_final->pv_coeff = pu1_ecd_data;

ps_cu_final->i1_cu_qp = ps_enc_out_ctxt->i1_cu_qp;
    if(ps_enc_loop_bestprms->u1_is_cu_coded)
    {
        ps_ctxt->i4_last_cu_qp_from_prev_ctb = ps_enc_out_ctxt->i1_cu_qp;
    }
    else
    {
        ps_ctxt->i4_last_cu_qp_from_prev_ctb = ps_ctxt->i4_pred_qp;
    }
    ps_cu_final->b1_first_cu_in_qg = ps_enc_out_ctxt->b1_first_cu_in_qg;

/* Update the no residue flag. Needed for inter cu. */
    /* Needed for deblocking inter/intra both           */
    //if(ps_cu_final->b1_pred_mode_flag == PRED_MODE_INTER)
    {
        ps_cu_final->b1_no_residual_syntax_flag = !ps_enc_loop_bestprms->u1_is_cu_coded;
    }

/* store the number of TUs */
    ps_cu_final->u2_num_tus_in_cu = ps_enc_loop_bestprms->u2_num_tus_in_cu;

/* ---- copy the TUs to final structure ----- */
    memcpy(
        ps_cu_final->ps_enc_tu,
        &ps_enc_loop_bestprms->as_tu_enc_loop[0],
        ps_enc_loop_bestprms->u2_num_tus_in_cu * sizeof(tu_enc_loop_out_t));

/* ---- copy the PUs to final structure ----- */
    memcpy(
        ps_cu_final->ps_pu,
        &ps_enc_loop_bestprms->as_pu_enc_loop[0],
        ps_enc_loop_bestprms->u2_num_pus_in_cu * sizeof(pu_t));

/* --- copy reminder and prev_flags ----- */
    /* only required for intra */
    if(PRED_MODE_INTRA == ps_cu_final->b1_pred_mode_flag)
    {
        memcpy(
            &ps_cu_final->as_prev_rem[0],
            &ps_enc_loop_bestprms->as_intra_prev_rem[0],
            ps_enc_loop_bestprms->u2_num_tus_in_cu * sizeof(intra_prev_rem_flags_t));

ps_cu_final->b3_chroma_intra_pred_mode = ps_enc_loop_bestprms->u1_chroma_intra_pred_mode;
    }

/* --------------------------------------------------- */
    /* ---- Boundary Strength Calculation at CU level ---- */
    /* --------------------------------------------------- */
    if(ps_ctxt->i4_deblk_pad_hpel_cur_pic)
    {
        WORD32 num_4x4_in_ctb;
        nbr_4x4_t *ps_left_nbr_4x4;
        nbr_4x4_t *ps_top_nbr_4x4;
        nbr_4x4_t *ps_curr_nbr_4x4;
        WORD32 nbr_4x4_left_strd;

num_4x4_in_ctb = (ps_cu_prms->i4_ctb_size >> 2);

ps_curr_nbr_4x4 = &ps_ctxt->as_ctb_nbr_arr[0];
        ps_curr_nbr_4x4 += (ps_enc_out_ctxt->b3_cu_pos_x << 1);
        ps_curr_nbr_4x4 += ((ps_enc_out_ctxt->b3_cu_pos_y << 1) * num_4x4_in_ctb);

/* CU left */
        if(0 == ps_enc_out_ctxt->b3_cu_pos_x)
        {
            ps_left_nbr_4x4 = &ps_ctxt->as_left_col_nbr[0];
            ps_left_nbr_4x4 += ps_enc_out_ctxt->b3_cu_pos_y << 1;
            nbr_4x4_left_strd = 1;
        }
        else
        {
            /* inside CTB */
            ps_left_nbr_4x4 = ps_curr_nbr_4x4 - 1;
            nbr_4x4_left_strd = num_4x4_in_ctb;
        }

/* CU top */
        if(0 == ps_enc_out_ctxt->b3_cu_pos_y)
        {
            /* CTB boundary */
            ps_top_nbr_4x4 = ps_ctxt->ps_top_row_nbr;
            ps_top_nbr_4x4 += (ps_cu_prms->i4_ctb_pos * (ps_cu_prms->i4_ctb_size >> 2));
            ps_top_nbr_4x4 += (ps_enc_out_ctxt->b3_cu_pos_x << 1);
        }
        else
        {
            /* inside CTB */
            ps_top_nbr_4x4 = ps_curr_nbr_4x4 - num_4x4_in_ctb;
        }

ihevce_bs_compute_cu(
            ps_cu_final,
            ps_top_nbr_4x4,
            ps_left_nbr_4x4,
            ps_curr_nbr_4x4,
            nbr_4x4_left_strd,
            num_4x4_in_ctb,
            &ps_ctxt->s_deblk_bs_prms);
    }
}

/**
*********************************************************************************
* Function name : ihevce_store_cu_results
*
* \brief
*    This function store cu result to cu info context
*
* \param[in] ps_ctxt : pointer to enc loop context structure
* \param[out] ps_cu_prms : pointer to  cu level parameters for SATD / RDOPT
*
* \return
*    None
*
**********************************************************************************/
void ihevce_store_cu_results(
    ihevce_enc_loop_ctxt_t *ps_ctxt,
    enc_loop_cu_prms_t *ps_cu_prms,
    final_mode_state_t *ps_final_state)
{
    ihevce_enc_cu_node_ctxt_t *ps_enc_tmp_out_ctxt;
    nbr_4x4_t *ps_nbr_4x4, *ps_tmp_nbr_4x4, *ps_curr_nbr_4x4;

UWORD8 *pu1_recon, *pu1_final_recon;
    WORD32 num_4x4_in_ctb, ctr;
    WORD32 num_4x4_in_cu;
    UWORD8 u1_is_422 = (ps_ctxt->u1_chroma_array_type == 2);
    WORD32 cu_depth, log2_ctb_size, log2_cu_size;

ps_enc_tmp_out_ctxt = ps_ctxt->ps_enc_out_ctxt;
    (void)ps_final_state;
#if PROCESS_GT_1CTB_VIA_CU_RECUR_IN_FAST_PRESETS
    {
        /* ---- copy the child luma recon back to curr. recon -------- */
        pu1_recon = (UWORD8 *)ps_ctxt->pv_cu_luma_recon;

/* based on CU position derive the luma pointers */
        pu1_final_recon = ps_cu_prms->pu1_luma_recon + (ps_enc_tmp_out_ctxt->b3_cu_pos_x << 3);

pu1_final_recon +=
            ((ps_enc_tmp_out_ctxt->b3_cu_pos_y << 3) * ps_cu_prms->i4_luma_recon_stride);

ps_ctxt->s_cmn_opt_func.pf_copy_2d(
            pu1_final_recon,
            ps_cu_prms->i4_luma_recon_stride,
            pu1_recon,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            ps_enc_tmp_out_ctxt->u1_cu_size);

/* ---- copy the child chroma recon back to curr. recon -------- */
        pu1_recon = (UWORD8 *)ps_ctxt->pv_cu_chrma_recon;

/* based on CU position derive the chroma pointers */
        pu1_final_recon = ps_cu_prms->pu1_chrm_recon + (ps_enc_tmp_out_ctxt->b3_cu_pos_x << 3);

pu1_final_recon +=
            ((ps_enc_tmp_out_ctxt->b3_cu_pos_y << (u1_is_422 + 2)) *
             ps_cu_prms->i4_chrm_recon_stride);

/* Cb and Cr pixel interleaved */
        ps_ctxt->s_cmn_opt_func.pf_copy_2d(
            pu1_final_recon,
            ps_cu_prms->i4_chrm_recon_stride,
            pu1_recon,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            (ps_enc_tmp_out_ctxt->u1_cu_size >> (0 == u1_is_422)));
    }
#else
    if(ps_ctxt->i4_quality_preset < IHEVCE_QUALITY_P2)
    {
        /* ---- copy the child luma recon back to curr. recon -------- */
        pu1_recon = (UWORD8 *)ps_ctxt->pv_cu_luma_recon;

/* based on CU position derive the luma pointers */
        pu1_final_recon = ps_cu_prms->pu1_luma_recon + (ps_enc_tmp_out_ctxt->b3_cu_pos_x << 3);

pu1_final_recon +=
            ((ps_enc_tmp_out_ctxt->b3_cu_pos_y << 3) * ps_cu_prms->i4_luma_recon_stride);

/* ---- copy the child chroma recon back to curr. recon -------- */
        pu1_recon = (UWORD8 *)ps_ctxt->pv_cu_chrma_recon;

/* based on CU position derive the chroma pointers */
        pu1_final_recon = ps_cu_prms->pu1_chrm_recon + (ps_enc_tmp_out_ctxt->b3_cu_pos_x << 3);

pu1_final_recon +=
            ((ps_enc_tmp_out_ctxt->b3_cu_pos_y << (u1_is_422 + 2)) *
             ps_cu_prms->i4_chrm_recon_stride);

ps_ctxt->s_cmn_opt_func.pf_copy_2d(
            pu1_final_recon,
            ps_cu_prms->i4_chrm_recon_stride,
            pu1_recon,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            ps_enc_tmp_out_ctxt->u1_cu_size,
            (ps_enc_tmp_out_ctxt->u1_cu_size >> (0 == u1_is_422)));
    }
#endif
    /*copy qp for qg*/
    {
        WORD32 i4_num_8x8, i4_x, i4_y;
        WORD32 i4_cu_pos_x, i4_cu_pox_y;
        i4_num_8x8 = ps_enc_tmp_out_ctxt->u1_cu_size >> 3;
        i4_cu_pos_x = ps_enc_tmp_out_ctxt->b3_cu_pos_x;
        i4_cu_pox_y = ps_enc_tmp_out_ctxt->b3_cu_pos_y;
        for(i4_y = 0; i4_y < i4_num_8x8; i4_y++)
        {
            for(i4_x = 0; i4_x < i4_num_8x8; i4_x++)
            {
                if(ps_enc_tmp_out_ctxt->ps_cu_prms->u1_is_cu_coded)
                {
                    ps_ctxt->ai4_qp_qg[((i4_cu_pox_y + i4_y) * 8) + (i4_cu_pos_x + i4_x)] =
                        ps_ctxt->i4_cu_qp;
                }
                else
                {
                    ps_ctxt->ai4_qp_qg[((i4_cu_pox_y + i4_y) * 8) + (i4_cu_pos_x + i4_x)] =
                        ps_ctxt->i4_pred_qp;
                }
            }
        }
    }

/* ------ copy the nbr 4x4 to final output ------ */
    num_4x4_in_cu = ps_enc_tmp_out_ctxt->u1_cu_size >> 2;
    num_4x4_in_ctb = (ps_cu_prms->i4_ctb_size >> 2);

ps_curr_nbr_4x4 = &ps_ctxt->as_ctb_nbr_arr[0];
    ps_curr_nbr_4x4 += (ps_enc_tmp_out_ctxt->b3_cu_pos_x << 1);
    ps_curr_nbr_4x4 += ((ps_enc_tmp_out_ctxt->b3_cu_pos_y << 1) * num_4x4_in_ctb);
    ps_tmp_nbr_4x4 = ps_curr_nbr_4x4;

ps_nbr_4x4 = ps_ctxt->ps_cu_recur_nbr;

GETRANGE(log2_ctb_size, ps_cu_prms->i4_ctb_size);
    GETRANGE(log2_cu_size, ps_enc_tmp_out_ctxt->u1_cu_size);
    cu_depth = log2_ctb_size - log2_cu_size;

ASSERT(cu_depth <= 3);
    ASSERT(cu_depth >= 0);

/*assign qp for all 4x4 nbr blocks*/
    for(ctr = 0; ctr < num_4x4_in_cu * num_4x4_in_cu; ctr++, ps_nbr_4x4++)
    {
        ps_nbr_4x4->b1_skip_flag = ps_enc_tmp_out_ctxt->s_cu_prms.u1_skip_flag;
        ps_nbr_4x4->b2_cu_depth = cu_depth;
        ps_nbr_4x4->b8_qp = ps_ctxt->i4_cu_qp;
    }

ps_nbr_4x4 = ps_ctxt->ps_cu_recur_nbr;

for(ctr = 0; ctr < num_4x4_in_cu; ctr++)
    {
        memcpy(ps_tmp_nbr_4x4, ps_nbr_4x4, num_4x4_in_cu * sizeof(nbr_4x4_t));

ps_tmp_nbr_4x4 += num_4x4_in_ctb;
        ps_nbr_4x4 += num_4x4_in_cu;
    }
}

/**
*********************************************************************************
* Function name : ihevce_populate_cu_struct
*
* \brief
*    This function populate cu struct
*
* \param[in] ps_ctxt : pointer to enc loop context structure
* \param[in] ps_cur_ipe_ctb : pointer to  IPE L0 analyze structure
* \param[in] ps_cu_tree_analyse : pointer to  Structure for CU recursion
* \param[in] ps_best_results : pointer to  strcuture  contain result for partition type of CU
* \param[in] ps_cu_out : pointer to  structre contain  mode analysis info
* \param[in] i4_32x32_id : noise estimation id
* \param[in] u1_num_best_results : num best result value
*
* \return
*    None
*
**********************************************************************************/
void ihevce_populate_cu_struct(
    ihevce_enc_loop_ctxt_t *ps_ctxt,
    ipe_l0_ctb_analyse_for_me_t *ps_cur_ipe_ctb,
    cur_ctb_cu_tree_t *ps_cu_tree_analyse,
    part_type_results_t *ps_best_results,
    cu_analyse_t *ps_cu_out,
    WORD32 i4_32x32_id,
#if DISABLE_INTRA_WHEN_NOISY && USE_NOISE_TERM_IN_ENC_LOOP
    UWORD8 u1_is_cu_noisy,
#endif
    UWORD8 u1_num_best_results)
{
    cu_inter_cand_t *ps_cu_candt;

WORD32 j;
    /* open loop intra cost by IPE */
    WORD32 intra_cost_ol;
    /* closed loop intra cost based on empirical coding noise estimate */
    WORD32 intra_cost_cl_est = 0;
    /* closed loop intra coding noise estimate */
    WORD32 intra_noise_cl_est;
    WORD32 num_results_to_copy = 0;

WORD32 found_intra = 0;
    WORD32 quality_preset = ps_ctxt->i4_quality_preset;
    WORD32 frm_qp = ps_ctxt->i4_frame_qp;
    WORD32 frm_qstep_multiplier = gau4_frame_qstep_multiplier[frm_qp - 1];
    WORD32 frm_qstep = ps_ctxt->i4_frame_qstep;
    UWORD8 u1_cu_size = ps_cu_tree_analyse->u1_cu_size;
    UWORD8 u1_x_off = ps_cu_tree_analyse->b3_cu_pos_x << 3;
    UWORD8 u1_y_off = ps_cu_tree_analyse->b3_cu_pos_y << 3;
    UWORD8 u1_threshold_multi;
    switch(quality_preset)
    {
    case IHEVCE_QUALITY_P0:
    case IHEVCE_QUALITY_P2:
    {
        num_results_to_copy =
            MIN(MAX_NUMBER_OF_INTER_RDOPT_CANDS_IN_PQ_AND_HQ, u1_num_best_results);
        break;
    }
    case IHEVCE_QUALITY_P3:
    {
        num_results_to_copy = MIN(MAX_NUMBER_OF_INTER_RDOPT_CANDS_IN_MS, u1_num_best_results);
        break;
    }
    case IHEVCE_QUALITY_P4:
    case IHEVCE_QUALITY_P5:
    case IHEVCE_QUALITY_P6:
    {
        num_results_to_copy =
            MIN(MAX_NUMBER_OF_INTER_RDOPT_CANDS_IN_HS_AND_XS, u1_num_best_results);
        break;
    }
    }

ps_cu_out->u1_num_inter_cands = 0;

/***************************************************************/
    /* Depending CU size that has won in ME,                       */
    /*     Estimate the closed loop intra cost for enabling intra  */
    /*     evaluation in rdopt stage based on preset               */
    /***************************************************************/
    switch(u1_cu_size)
    {
    case 64:
    {
        /* coding noise estimate for intra closed loop cost */
        intra_cost_ol = ps_cur_ipe_ctb->i4_best64x64_intra_cost - frm_qstep * 256;

intra_noise_cl_est = (frm_qstep * frm_qstep_multiplier) + (intra_cost_ol >> 4);

intra_noise_cl_est = MIN(intra_noise_cl_est, (frm_qstep * 16)) * 16;

intra_cost_cl_est = intra_cost_ol + intra_noise_cl_est;
        break;
    }
    case 32:
    {
        /* coding noise estimate for intra closed loop cost */
        intra_cost_ol = ps_cur_ipe_ctb->ai4_best32x32_intra_cost[i4_32x32_id] - frm_qstep * 64;

intra_noise_cl_est = (frm_qstep * frm_qstep_multiplier) + (intra_cost_ol >> 4);

intra_noise_cl_est = MIN(intra_noise_cl_est, (frm_qstep * 16)) * 4;

intra_cost_cl_est = intra_cost_ol + intra_noise_cl_est;
        break;
    }
    case 16:
    {
        /* coding noise estimate for intra closed loop cost */
        intra_cost_ol =
            ps_cur_ipe_ctb->ai4_best16x16_intra_cost[(u1_x_off >> 4) + ((u1_y_off >> 4) << 2)] -
            frm_qstep * 16;

intra_noise_cl_est = (frm_qstep * frm_qstep_multiplier) + (intra_cost_ol >> 4);

intra_noise_cl_est = MIN(intra_noise_cl_est, (frm_qstep * 16));

intra_cost_cl_est = intra_cost_ol + intra_noise_cl_est;
        break;
    }
    case 8:
    {
        /* coding noise estimate for intra closed loop cost */
        intra_cost_ol =
            ps_cur_ipe_ctb->ai4_best8x8_intra_cost[(u1_x_off >> 3) + u1_y_off] - frm_qstep * 4;

intra_noise_cl_est = (frm_qstep * frm_qstep_multiplier) + (intra_cost_ol >> 4);

intra_noise_cl_est = MIN(intra_noise_cl_est, (frm_qstep * 16)) >> 2;

intra_cost_cl_est = intra_cost_ol + intra_noise_cl_est;
        break;
    }
    }
#if DISABLE_INTER_CANDIDATES
    return;
#endif

u1_threshold_multi = 1;
#if DISABLE_INTRA_WHEN_NOISY && USE_NOISE_TERM_IN_ENC_LOOP
    if(u1_is_cu_noisy)
    {
        intra_cost_cl_est = INT_MAX;
    }
#endif

ps_cu_candt = ps_cu_out->as_cu_inter_cand;

/* Check if the first best candidate is inter or intra */
    if(ps_best_results[0].as_pu_results[0].pu.b1_intra_flag)
    {
        ps_cu_out->u1_best_is_intra = 1;
    }
    else
    {
        ps_cu_out->u1_best_is_intra = 0;
    }

for(j = 0; j < u1_num_best_results; j++)
    {
        part_type_results_t *ps_best = &ps_best_results[j];

if(ps_best->as_pu_results[0].pu.b1_intra_flag)
        {
            found_intra = 1;
        }
        else
        {
            /* populate the TU split flags, 4 flags copied as max cu can be 64 */
            memcpy(ps_cu_candt->ai4_tu_split_flag, ps_best->ai4_tu_split_flag, 4 * sizeof(WORD32));

/* populate the TU early CBF flags, 4 flags copied as max cu can be 64 */
            memcpy(ps_cu_candt->ai4_tu_early_cbf, ps_best->ai4_tu_early_cbf, 4 * sizeof(WORD32));

/* Note: the enums of part size and me part types shall match */
            ps_cu_candt->b3_part_size = ps_best->u1_part_type;

/* ME will always set the skip flag to 0            */
            /* in closed loop skip will be added as a candidate */
            ps_cu_candt->b1_skip_flag = 0;

/* copy the inter pus : Note: assuming NxN part type is not supported */
            ps_cu_candt->as_inter_pu[0] = ps_best->as_pu_results[0].pu;

ps_cu_candt->as_inter_pu[0].b1_merge_flag = 0;

/* Copy the total cost of the CU candt */
            ps_cu_candt->i4_total_cost = ps_best->i4_tot_cost;

ps_cu_out->ai4_mv_cost[ps_cu_out->u1_num_inter_cands][0] =
                ps_best->as_pu_results[0].i4_mv_cost;

#if REUSE_ME_COMPUTED_ERROR_FOR_INTER_CAND_SIFTING
            ps_cu_out->ai4_err_metric[ps_cu_out->u1_num_inter_cands][0] =
                ps_best->as_pu_results[0].i4_tot_cost - ps_best->as_pu_results[0].i4_mv_cost;
#endif

if(ps_best->u1_part_type)
            {
                ps_cu_candt->as_inter_pu[1] = ps_best->as_pu_results[1].pu;
                ps_cu_out->ai4_mv_cost[ps_cu_out->u1_num_inter_cands][1] =
                    ps_best->as_pu_results[1].i4_mv_cost;
#if REUSE_ME_COMPUTED_ERROR_FOR_INTER_CAND_SIFTING
                ps_cu_out->ai4_err_metric[ps_cu_out->u1_num_inter_cands][1] =
                    ps_best->as_pu_results[1].i4_tot_cost - ps_best->as_pu_results[1].i4_mv_cost;
#endif

ps_cu_candt->as_inter_pu[1].b1_merge_flag = 0;
            }

ps_cu_candt++;
            ps_cu_out->u1_num_inter_cands++;
            if(intra_cost_cl_est < ((ps_best->i4_tot_cost * u1_threshold_multi) >> 0))
            {
                /* The rationale - */
                /* Artefacts were being observed in some sequences, */
                /* Brooklyn_1080p in particular - where it was readily */
                /* apparent. The cause was coding of CU's as inter CU's */
                /* when they actually needed to be coded as intra CU's. */
                /* This was observed during either fade-outs aor flashes. */
                /* After tinkering with the magnitude of the coding noise */
                /* factor that was added to the intra cost to see when the */
                /* artefacts in Brooklyn vanished, it was observed that the */
                /* factor multiplied with the frame_qstep followed a pattern. */
                /* When the pattern was subjected to a regression analysis, the */
                /* formula seen below emerged. Also note the fact that the coding */
                /* noise factor is the product of the frame_qstep and a constant */
                /* multiplier */

/*UWORD32 frm_qstep_multiplier =
                -3.346 * log((float)frm_qstep) + 15.925;*/
                found_intra = 1;
            }

if(ps_cu_out->u1_num_inter_cands >= num_results_to_copy)
            {
                break;
            }
        }
    }

if(quality_preset < IHEVCE_QUALITY_P4)
    {
        found_intra = 1;
    }

if(!found_intra)
    {
        /* rdopt evaluation of intra disabled as inter is clear winner */
        ps_cu_out->u1_num_intra_rdopt_cands = 0;

/* all the modes invalidated */
        ps_cu_out->s_cu_intra_cand.au1_intra_luma_modes_2nx2n_tu_eq_cu[0] = 255;
        ps_cu_out->s_cu_intra_cand.au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
        ps_cu_out->s_cu_intra_cand.au1_intra_luma_modes_nxn[0][0] = 255;
        ps_cu_out->u1_chroma_intra_pred_mode = 255;

/* no intra candt to verify */
        ps_cu_out->s_cu_intra_cand.b6_num_intra_cands = 0;
    }
}

/**
*********************************************************************************
* Function name : ihevce_create_child_nodes_cu_tree
*
* \brief
*    This function create child node from cu tree
*
* \param[in] ps_cu_tree_root : pointer to Structure for CU recursion
* \param[out] ps_cu_tree_cur_node : pointer to  Structure for CU recursion
* \param[in] ai4_child_node_enable : child node enable flag
* \param[in] nodes_already_created : already created node value
* \return
*    None
*
**********************************************************************************/
WORD32 ihevce_create_child_nodes_cu_tree(
    cur_ctb_cu_tree_t *ps_cu_tree_root,
    cur_ctb_cu_tree_t *ps_cu_tree_cur_node,
    WORD32 *ai4_child_node_enable,
    WORD32 nodes_already_created)
{
    cur_ctb_cu_tree_t *ps_tl;
    cur_ctb_cu_tree_t *ps_tr;
    cur_ctb_cu_tree_t *ps_bl;
    cur_ctb_cu_tree_t *ps_br;

ps_tl = ps_cu_tree_root + nodes_already_created;
    ps_tr = ps_tl + 1;
    ps_bl = ps_tr + 1;
    ps_br = ps_bl + 1;

if(1 == ps_cu_tree_cur_node->is_node_valid)
    {
        ps_tl = (ai4_child_node_enable[0]) ? ps_tl : NULL;
        ps_tr = (ai4_child_node_enable[1]) ? ps_tr : NULL;
        ps_bl = (ai4_child_node_enable[2]) ? ps_bl : NULL;
        ps_br = (ai4_child_node_enable[3]) ? ps_br : NULL;

/* In incomplete CTB, if any of the child nodes are assigned to NULL */
        /* then parent node ceases to be valid */
        if((ps_tl == NULL) || (ps_tr == NULL) || (ps_br == NULL) || (ps_bl == NULL))
        {
            ps_cu_tree_cur_node->is_node_valid = 0;
        }
    }
    ps_cu_tree_cur_node->ps_child_node_tl = ps_tl;
    ps_cu_tree_cur_node->ps_child_node_tr = ps_tr;
    ps_cu_tree_cur_node->ps_child_node_bl = ps_bl;
    ps_cu_tree_cur_node->ps_child_node_br = ps_br;

return 4;
}

/**
*********************************************************************************
* Function name : ihevce_populate_cu_tree
*
* \brief
*    This function create child node from cu tree
*
* \param[in] ps_cur_ipe_ctb : pointer to Structure for CU recursion
* \param[out] ps_cu_tree : pointer to  Structure for CU recursion
* \param[in] tree_depth : child node enable flag
* \param[in] e_quality_preset : already created node value
* \param[in] e_grandparent_blk_pos : already created node value
* \param[in] e_parent_blk_pos : already created node value
* \param[in] e_cur_blk_pos : already created node value
*
* \return
*    None
*
**********************************************************************************/
void ihevce_populate_cu_tree(
    ipe_l0_ctb_analyse_for_me_t *ps_cur_ipe_ctb,
    cur_ctb_cu_tree_t *ps_cu_tree,
    WORD32 tree_depth,
    IHEVCE_QUALITY_CONFIG_T e_quality_preset,
    CU_POS_T e_grandparent_blk_pos,
    CU_POS_T e_parent_blk_pos,
    CU_POS_T e_cur_blk_pos)
{
    WORD32 ai4_child_enable[4];
    WORD32 children_nodes_required = 0;
    WORD32 cu_pos_x = 0;
    WORD32 cu_pos_y = 0;
    WORD32 cu_size = 0;
    WORD32 i;
    WORD32 node_validity = 0;

if(NULL == ps_cu_tree)
    {
        return;
    }

switch(tree_depth)
    {
    case 0:
    {
        /* 64x64 block */
        intra32_analyse_t *ps_intra32_analyse = ps_cur_ipe_ctb->as_intra32_analyse;

children_nodes_required = 1;
        cu_size = 64;
        cu_pos_x = 0;
        cu_pos_y = 0;

node_validity = !ps_cur_ipe_ctb->u1_split_flag;

if(e_quality_preset >= IHEVCE_QUALITY_P2)
        {
            if(node_validity == 1)
            {
                children_nodes_required = 0;
            }
        }

for(i = 0; i < 4; i++)
        {
            ai4_child_enable[i] = ps_intra32_analyse[i].b1_valid_cu;
        }

break;
    }
    case 1:
    {
        /* 32x32 block */
        WORD32 valid_flag_32 = (ps_cur_ipe_ctb->as_intra32_analyse[e_cur_blk_pos].b1_valid_cu);

intra16_analyse_t *ps_intra16_analyse =
            ps_cur_ipe_ctb->as_intra32_analyse[e_cur_blk_pos].as_intra16_analyse;

cu_size = 32;

/* Explanation for logic below - */
        /* * pos_x and pos_y are in units of 8x8 CU's */
        /* * pos_x = 0 for TL and BL children */
        /* * pos_x = 4 for TR and BR children */
        /* * pos_y = 0 for TL and TR children */
        /* * pos_y = 4 for BL and BR children */
        cu_pos_x = (e_cur_blk_pos & 1) << 2;
        cu_pos_y = (e_cur_blk_pos & 2) << 1;

{
            node_validity = (ps_cur_ipe_ctb->as_intra32_analyse[e_cur_blk_pos].b1_merge_flag);

if(e_quality_preset >= IHEVCE_QUALITY_P2)
            {
                node_validity = (!ps_cur_ipe_ctb->as_intra32_analyse[e_cur_blk_pos].b1_split_flag);
            }

node_validity = node_validity && valid_flag_32;
            children_nodes_required = !node_validity || ps_cur_ipe_ctb->u1_split_flag;
        }

if(e_quality_preset >= IHEVCE_QUALITY_P2)
        {
            if(node_validity == 1)
            {
                children_nodes_required = 0;
            }
            else
            {
                children_nodes_required =
                    (ps_cur_ipe_ctb->as_intra32_analyse[e_cur_blk_pos].b1_split_flag);
            }
        }

for(i = 0; i < 4; i++)
        {
            ai4_child_enable[i] = ps_intra16_analyse[i].b1_valid_cu;
        }

break;
    }
    case 2:
    {
        /* 16x16 block */
        WORD32 cu_pos_x_parent;
        WORD32 cu_pos_y_parent;
        WORD32 merge_flag_16;
        WORD32 merge_flag_32;

intra8_analyse_t *ps_intra8_analyse = ps_cur_ipe_ctb->as_intra32_analyse[e_parent_blk_pos]
                                                  .as_intra16_analyse[e_cur_blk_pos]
                                                  .as_intra8_analyse;

WORD32 valid_flag_16 = (ps_cur_ipe_ctb->as_intra32_analyse[e_parent_blk_pos]
                                    .as_intra16_analyse[e_cur_blk_pos]
                                    .b1_valid_cu);

cu_size = 16;

/* Explanation for logic below - */
        /* See similar explanation above */
        cu_pos_x_parent = (e_parent_blk_pos & 1) << 2;
        cu_pos_y_parent = (e_parent_blk_pos & 2) << 1;
        cu_pos_x = cu_pos_x_parent + ((e_cur_blk_pos & 1) << 1);
        cu_pos_y = cu_pos_y_parent + (e_cur_blk_pos & 2);

merge_flag_16 = (ps_cur_ipe_ctb->as_intra32_analyse[e_parent_blk_pos]
                             .as_intra16_analyse[e_cur_blk_pos]
                             .b1_merge_flag);
        merge_flag_32 = (ps_cur_ipe_ctb->as_intra32_analyse[e_parent_blk_pos].b1_merge_flag);

#if !ENABLE_UNIFORM_CU_SIZE_8x8
        node_validity = (merge_flag_16) || ((ps_cur_ipe_ctb->u1_split_flag) && (!merge_flag_32));
#else
        node_validity = 0;
#endif

node_validity = (merge_flag_16) || ((ps_cur_ipe_ctb->u1_split_flag) && (!merge_flag_32));

if(e_quality_preset >= IHEVCE_QUALITY_P2)
        {
            node_validity = (!ps_cur_ipe_ctb->as_intra32_analyse[e_parent_blk_pos]
                                  .as_intra16_analyse[e_cur_blk_pos]
                                  .b1_split_flag);
        }

node_validity = node_validity && valid_flag_16;

children_nodes_required = ((ps_cur_ipe_ctb->u1_split_flag) && (!merge_flag_32)) ||
                                  !merge_flag_16;

if(e_quality_preset >= IHEVCE_QUALITY_P2)
        {
            children_nodes_required = !node_validity;
        }

for(i = 0; i < 4; i++)
        {
            ai4_child_enable[i] = ps_intra8_analyse[i].b1_valid_cu;
        }
        break;
    }
    case 3:
    {
        /* 8x8 block */
        WORD32 cu_pos_x_grandparent;
        WORD32 cu_pos_y_grandparent;

WORD32 cu_pos_x_parent;
        WORD32 cu_pos_y_parent;

WORD32 valid_flag_8 = (ps_cur_ipe_ctb->as_intra32_analyse[e_grandparent_blk_pos]
                                   .as_intra16_analyse[e_parent_blk_pos]
                                   .as_intra8_analyse[e_cur_blk_pos]
                                   .b1_valid_cu);

cu_size = 8;

cu_pos_x_grandparent = (e_grandparent_blk_pos & 1) << 2;
        cu_pos_y_grandparent = (e_grandparent_blk_pos & 2) << 1;
        cu_pos_x_parent = cu_pos_x_grandparent + ((e_parent_blk_pos & 1) << 1);
        cu_pos_y_parent = cu_pos_y_grandparent + (e_parent_blk_pos & 2);
        cu_pos_x = cu_pos_x_parent + (e_cur_blk_pos & 1);
        cu_pos_y = cu_pos_y_parent + ((e_cur_blk_pos & 2) >> 1);

node_validity = 1 && valid_flag_8;

children_nodes_required = 0;

break;
    }
    }

/* Fill the current cu_tree node */
    ps_cu_tree->is_node_valid = node_validity;
    ps_cu_tree->u1_cu_size = cu_size;
    ps_cu_tree->b3_cu_pos_x = cu_pos_x;
    ps_cu_tree->b3_cu_pos_y = cu_pos_y;

if(children_nodes_required)
    {
        tree_depth++;

ps_cur_ipe_ctb->nodes_created_in_cu_tree += ihevce_create_child_nodes_cu_tree(
            ps_cur_ipe_ctb->ps_cu_tree_root,
            ps_cu_tree,
            ai4_child_enable,
            ps_cur_ipe_ctb->nodes_created_in_cu_tree);

ihevce_populate_cu_tree(
            ps_cur_ipe_ctb,
            ps_cu_tree->ps_child_node_tl,
            tree_depth,
            e_quality_preset,
            e_parent_blk_pos,
            e_cur_blk_pos,
            POS_TL);

ihevce_populate_cu_tree(
            ps_cur_ipe_ctb,
            ps_cu_tree->ps_child_node_tr,
            tree_depth,
            e_quality_preset,
            e_parent_blk_pos,
            e_cur_blk_pos,
            POS_TR);

ihevce_populate_cu_tree(
            ps_cur_ipe_ctb,
            ps_cu_tree->ps_child_node_bl,
            tree_depth,
            e_quality_preset,
            e_parent_blk_pos,
            e_cur_blk_pos,
            POS_BL);

ihevce_populate_cu_tree(
            ps_cur_ipe_ctb,
            ps_cu_tree->ps_child_node_br,
            tree_depth,
            e_quality_preset,
            e_parent_blk_pos,
            e_cur_blk_pos,
            POS_BR);
    }
    else
    {
        ps_cu_tree->ps_child_node_tl = NULL;
        ps_cu_tree->ps_child_node_tr = NULL;
        ps_cu_tree->ps_child_node_bl = NULL;
        ps_cu_tree->ps_child_node_br = NULL;
    }
}

/**
*********************************************************************************
* Function name : ihevce_intra_mode_populator
*
* \brief
*    This function populate intra mode info to strcut
*
* \param[in] ps_cu_intra_cand : pointer to Structure contain cu intra candidate info
* \param[out] ps_ipe_data : pointer to  IPE L0 analyze structure
* \param[in] ps_cu_tree_data : poniter to cu recursive struct
* \param[in] i1_slice_type : contain slice type value
* \param[in] i4_quality_preset : contain quality preset value
*
* \return
*    None
*
**********************************************************************************/
static void ihevce_intra_mode_populator(
    cu_intra_cand_t *ps_cu_intra_cand,
    ipe_l0_ctb_analyse_for_me_t *ps_ipe_data,
    cur_ctb_cu_tree_t *ps_cu_tree_data,
    WORD8 i1_slice_type,
    WORD32 i4_quality_preset)
{
    WORD32 i4_32x32_id, i4_16x16_id, i4_8x8_id;

UWORD8 u1_cu_pos_x = ps_cu_tree_data->b3_cu_pos_x;
    UWORD8 u1_cu_pos_y = ps_cu_tree_data->b3_cu_pos_y;

i4_32x32_id = ((u1_cu_pos_x & 4) >> 2) + ((u1_cu_pos_y & 4) >> 1);

i4_16x16_id = ((u1_cu_pos_x & 2) >> 1) + ((u1_cu_pos_y & 2));

i4_8x8_id = (u1_cu_pos_x & 1) + ((u1_cu_pos_y & 1) << 1);

if(i4_quality_preset < IHEVCE_QUALITY_P3)
    {
        switch(ps_cu_tree_data->u1_cu_size)
        {
        case 64:
        {
            memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_ipe_data->au1_best_modes_32x32_tu,
                MAX_INTRA_CU_CANDIDATES + 1);

break;
        }
        case 32:
        {
            intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_32x32_ipe_analyze->au1_best_modes_32x32_tu,
                MAX_INTRA_CU_CANDIDATES + 1);

if((i1_slice_type != ISLICE) && (i4_quality_preset == IHEVCE_QUALITY_P0))
            {
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
            }
            else if((i1_slice_type == ISLICE) && (i4_quality_preset == IHEVCE_QUALITY_P0))
            {
                if((ps_cu_tree_data->ps_child_node_bl != NULL) &&
                   (ps_cu_tree_data->ps_child_node_bl->is_node_valid))
                {
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
                }
                else
                {
                    memcpy(
                        ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                        ps_32x32_ipe_analyze->au1_best_modes_16x16_tu,
                        MAX_INTRA_CU_CANDIDATES + 1);
                }
            }
            else
            {
                memcpy(
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                    ps_32x32_ipe_analyze->au1_best_modes_16x16_tu,
                    MAX_INTRA_CU_CANDIDATES + 1);
            }

break;
        }
        case 16:
        {
            /* Copy best 16x16 CU modes */
            intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

intra16_analyse_t *ps_16x16_ipe_analyze =
                &ps_32x32_ipe_analyze->as_intra16_analyse[i4_16x16_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_16x16_ipe_analyze->au1_best_modes_16x16_tu,
                MAX_INTRA_CU_CANDIDATES + 1);

if((i1_slice_type != ISLICE) && (i4_quality_preset == IHEVCE_QUALITY_P0))
            {
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
            }
            else if((i1_slice_type == ISLICE) && (i4_quality_preset == IHEVCE_QUALITY_P0))
            {
                if((ps_cu_tree_data->ps_child_node_bl != NULL) &&
                   (ps_cu_tree_data->ps_child_node_bl->is_node_valid))
                {
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
                }
                else
                {
                    memcpy(
                        ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                        ps_16x16_ipe_analyze->au1_best_modes_8x8_tu,
                        MAX_INTRA_CU_CANDIDATES + 1);
                }
            }
            else
            {
                memcpy(
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                    ps_16x16_ipe_analyze->au1_best_modes_8x8_tu,
                    MAX_INTRA_CU_CANDIDATES + 1);
            }

break;
        }
        case 8:
        {
            intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

intra16_analyse_t *ps_16x16_ipe_analyze =
                &ps_32x32_ipe_analyze->as_intra16_analyse[i4_16x16_id];

intra8_analyse_t *ps_8x8_ipe_analyze =
                &ps_16x16_ipe_analyze->as_intra8_analyse[i4_8x8_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_8x8_ipe_analyze->au1_best_modes_8x8_tu,
                MAX_INTRA_CU_CANDIDATES + 1);

ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;

/* Initialise the hash */
            {
                WORD32 i, j;

for(i = 0; i < NUM_PU_PARTS; i++)
                {
                    ps_cu_intra_cand->au1_num_modes_added[i] = 0;

for(j = 0; j < MAX_INTRA_CANDIDATES; j++)
                    {
                        ps_cu_intra_cand->au1_intra_luma_mode_nxn_hash[i][j] = 0;
                    }
                }

for(i = 0; i < NUM_PU_PARTS; i++)
                {
                    for(j = 0; j < MAX_INTRA_CU_CANDIDATES; j++)
                    {
                        if(ps_8x8_ipe_analyze->au1_4x4_best_modes[i][j] == 255)
                        {
                            ps_cu_intra_cand->au1_intra_luma_modes_nxn[i][j] = 255;
                            break;
                        }

ps_cu_intra_cand->au1_intra_luma_modes_nxn[i][j] =
                            ps_8x8_ipe_analyze->au1_4x4_best_modes[i][j];

ps_cu_intra_cand->au1_intra_luma_mode_nxn_hash
                            [i][ps_8x8_ipe_analyze->au1_4x4_best_modes[i][j]] = 1;

ps_cu_intra_cand->au1_num_modes_added[i]++;
                    }

if(ps_cu_intra_cand->au1_num_modes_added[i] == MAX_INTRA_CU_CANDIDATES)
                    {
                        if(i1_slice_type != BSLICE)
                        {
                            ps_cu_intra_cand->au1_num_modes_added[i] =
                                ihevce_intra_mode_nxn_hash_updater(
                                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[i],
                                    ps_cu_intra_cand->au1_intra_luma_mode_nxn_hash[i],
                                    ps_cu_intra_cand->au1_num_modes_added[i]);
                        }
                    }
                }
            }

break;
        }
        }
    }
    else if(i4_quality_preset == IHEVCE_QUALITY_P6)
    {
        switch(ps_cu_tree_data->u1_cu_size)
        {
        case 64:
        {
            memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_ipe_data->au1_best_modes_32x32_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

ps_cu_intra_cand->b1_eval_tx_cusize = 0;
            ps_cu_intra_cand->b1_eval_tx_cusize_by2 = 1;
            ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu[0] = 255;

#if ENABLE_INTRA_MODE_FILTERING_IN_XS25
            ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2
                [MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
#endif

break;
        }
        case 32:
        {
            intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_32x32_ipe_analyze->au1_best_modes_32x32_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_32x32_ipe_analyze->au1_best_modes_16x16_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

#if ENABLE_INTRA_MODE_FILTERING_IN_XS25
            ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu
                [MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
            ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2
                [MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
#endif

break;
        }
        case 16:
        {
            /* Copy best 16x16 CU modes */
            intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

intra16_analyse_t *ps_16x16_ipe_analyze =
                &ps_32x32_ipe_analyze->as_intra16_analyse[i4_16x16_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_16x16_ipe_analyze->au1_best_modes_16x16_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_16x16_ipe_analyze->au1_best_modes_8x8_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

break;
        }
        case 8:
        {
            WORD32 i;

intra32_analyse_t *ps_32x32_ipe_analyze = &ps_ipe_data->as_intra32_analyse[i4_32x32_id];

intra16_analyse_t *ps_16x16_ipe_analyze =
                &ps_32x32_ipe_analyze->as_intra16_analyse[i4_16x16_id];

intra8_analyse_t *ps_8x8_ipe_analyze =
                &ps_16x16_ipe_analyze->as_intra8_analyse[i4_8x8_id];

memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu,
                ps_8x8_ipe_analyze->au1_best_modes_8x8_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

#if !ENABLE_INTRA_MODE_FILTERING_IN_XS25
            memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_8x8_ipe_analyze->au1_best_modes_4x4_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));

for(i = 0; i < 4; i++)
            {
                memcpy(
                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[i],
                    ps_8x8_ipe_analyze->au1_4x4_best_modes[i],
                    (NUM_BEST_MODES + 1) * sizeof(UWORD8));

ps_cu_intra_cand->au1_intra_luma_modes_nxn[i][MAX_INTRA_CU_CANDIDATES] = 255;
            }
#else
            if(255 == ps_8x8_ipe_analyze->au1_4x4_best_modes[0][0])
            {
                memcpy(
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                    ps_8x8_ipe_analyze->au1_best_modes_4x4_tu,
                    (NUM_BEST_MODES + 1) * sizeof(UWORD8));

ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2
                    [MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
            }
            else
            {
                for(i = 0; i < 4; i++)
                {
                    memcpy(
                        ps_cu_intra_cand->au1_intra_luma_modes_nxn[i],
                        ps_8x8_ipe_analyze->au1_4x4_best_modes[i],
                        (NUM_BEST_MODES + 1) * sizeof(UWORD8));

ps_cu_intra_cand->au1_intra_luma_modes_nxn
                        [i][MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
                }
            }

ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu
                [MAX_NUM_INTRA_MODES_PER_TU_DISTRIBUTION_IN_XS25] = 255;
#endif

#if FORCE_NXN_MODE_BASED_ON_OL_IPE
            if((i4_quality_preset == IHEVCE_QUALITY_P6) && (i1_slice_type != ISLICE))
            {
                /*Evaluate nxn mode for 8x8 if ol ipe wins for nxn over cu=tu and cu=4tu.*/
                /*Disbale CU=TU and CU=4TU modes */
                if(ps_8x8_ipe_analyze->b1_enable_nxn == 1)
                {
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu[0] = 255;
                    ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2[0] = 255;
                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[0][1] = 255;
                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[1][1] = 255;
                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[2][1] = 255;
                    ps_cu_intra_cand->au1_intra_luma_modes_nxn[3][1] = 255;
                }
            }
#endif

break;
        }
        }
    }
    else
    {
        switch(ps_cu_tree_data->u1_cu_size)
        {
        case 64:
        {
            memcpy(
                ps_cu_intra_cand->au1_intra_luma_modes_2nx2n_tu_eq_cu_by_2,
                ps_ipe_data->au1_best_modes_32x32_tu,
                (NUM_BEST_MODES + 1) * sizeof(UWORD8));