decoder/ih264d_parse_slice.c

/******************************************************************************
 *
 * 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_parse_slice.c
 *
 * \brief
 *    Contains routines that decodes a slice NAL unit
 *
 * \date
 *    19/12/2002
 *
 * \author  AI
 **************************************************************************
 */
#include <string.h>
#include "ih264_typedefs.h"
#include "ih264_macros.h"
#include "ih264_platform_macros.h"
#include "ithread.h"
#include "ih264d_structs.h"
#include "ih264d_debug.h"
#include "ih264d_bitstrm.h"
#include "ih264d_parse_mb_header.h"
#include "ih264d_process_bslice.h"
#include "ih264d_process_pslice.h"
#include "ih264d_parse_cavlc.h"
#include "ih264d_utils.h"
#include "ih264d_deblocking.h"
#include "ih264d_defs.h"
#include "ih264d_error_handler.h"
#include "ih264d_tables.h"
#include "ih264d_defs.h"
#include "ih264d_mem_request.h"
#include "ih264d_parse_islice.h"
#include "ih264d_parse_slice.h"
#include "ih264d_mvpred.h"
#include "ih264d_mb_utils.h"

#include "ih264d_defs.h"
#include "ih264d_quant_scaling.h"

#include "ih264d_inter_pred.h"

#include "ih264d_sei.h"
#include "ih264d.h"
#include "ih264_error.h"
#include "ih264_disp_mgr.h"
#include "ih264_buf_mgr.h"

#include "ih264d_thread_parse_decode.h"
#include "ih264d_thread_compute_bs.h"
#include "ih264d_dpb_manager.h"
#include <assert.h>
#include "ih264d_parse_islice.h"
#define RET_LAST_SKIP  0x80000000

WORD32 check_app_out_buf_size(dec_struct_t *ps_dec);
/*!
 **************************************************************************
 * \if Function name : ih264d_form_pred_weight_matrix \endif
 *
 * \brief
 *    Forms pred weight matrix.
 *
 * \return
 *    None
 *
 **************************************************************************
 */

void ih264d_form_pred_weight_matrix(dec_struct_t *ps_dec)
{
    dec_slice_params_t *ps_cur_slice;
    UWORD8 uc_num_ref_idx_l0_active, uc_num_ref_idx_l1_active;
    UWORD8 i, j;
    UWORD32 *pu4_mat_iwt_ofst;
    UWORD16 i2_idx;
    UWORD32 *pui32_weight_offset_l0, *pui32_weight_offset_l1;
    UWORD32 u4_temp;

    ps_cur_slice = ps_dec->ps_cur_slice;
    uc_num_ref_idx_l0_active = ps_cur_slice->u1_num_ref_idx_lx_active[0];
    uc_num_ref_idx_l1_active = ps_cur_slice->u1_num_ref_idx_lx_active[1];

    pu4_mat_iwt_ofst = ps_dec->pu4_wts_ofsts_mat;

    if(ps_cur_slice->u1_slice_type == B_SLICE)
    {
        for(i = 0; i < uc_num_ref_idx_l0_active; i++)
        {
            pui32_weight_offset_l0 = ps_cur_slice->u4_wt_ofst_lx[0][i];
            for(j = 0; j < uc_num_ref_idx_l1_active; j++)
            {
                pui32_weight_offset_l1 = ps_cur_slice->u4_wt_ofst_lx[1][j];
                i2_idx = i * uc_num_ref_idx_l0_active + j;
                i2_idx = X3(i2_idx);
                /*        u4_temp = (pui32_weight_offset_l0[0] | (pui32_weight_offset_l1[0] << 16));
                 pu4_mat_iwt_ofst[0] = u4_temp;
                 u4_temp = (pui32_weight_offset_l0[1] | (pui32_weight_offset_l1[1] << 16));
                 pu4_mat_iwt_ofst[1] = u4_temp;
                 u4_temp = (pui32_weight_offset_l0[2] | (pui32_weight_offset_l1[2] << 16));
                 pu4_mat_iwt_ofst[2] = u4_temp;
                 pu4_mat_iwt_ofst += 3;*/
                pu4_mat_iwt_ofst[0] = pui32_weight_offset_l0[0];
                pu4_mat_iwt_ofst[1] = pui32_weight_offset_l1[0];
                pu4_mat_iwt_ofst[2] = pui32_weight_offset_l0[1];
                pu4_mat_iwt_ofst[3] = pui32_weight_offset_l1[1];
                pu4_mat_iwt_ofst[4] = pui32_weight_offset_l0[2];
                pu4_mat_iwt_ofst[5] = pui32_weight_offset_l1[2];
                pu4_mat_iwt_ofst += 6;
            }
        }
    }
    else
    {
        for(i = 0; i < uc_num_ref_idx_l0_active; i++)
        {
            pui32_weight_offset_l0 = ps_cur_slice->u4_wt_ofst_lx[0][i];
            i2_idx = X3(i);
            u4_temp = (UWORD32)pui32_weight_offset_l0[0];
            pu4_mat_iwt_ofst[0] = u4_temp;
            u4_temp = (UWORD32)pui32_weight_offset_l0[1];
            pu4_mat_iwt_ofst[2] = u4_temp;
            u4_temp = (UWORD32)pui32_weight_offset_l0[2];
            pu4_mat_iwt_ofst[4] = u4_temp;
            pu4_mat_iwt_ofst += 6;
        }
    }
}


/*!
 **************************************************************************
 * \if Function name :  init_firstSliceParam \endif
 *
 * \brief
 *    Initialize the Parameter required for all the slices for a picture
 *
 * \return           : Nothing
 *
 **************************************************************************
 */

WORD32 ih264d_start_of_pic(dec_struct_t *ps_dec,
                         WORD32 i4_poc,
                         pocstruct_t *ps_temp_poc,
                         UWORD16 u2_frame_num,
                         dec_pic_params_t *ps_pps)
{
    pocstruct_t *ps_prev_poc = &ps_dec->s_cur_pic_poc;
    pocstruct_t *ps_cur_poc = ps_temp_poc;

    pic_buffer_t *pic_buf;

    ivd_video_decode_op_t * ps_dec_output =
                    (ivd_video_decode_op_t *)ps_dec->pv_dec_out;
    dec_slice_params_t *ps_cur_slice = ps_dec->ps_cur_slice;
    dec_seq_params_t *ps_seq = ps_pps->ps_sps;
    UWORD8 u1_bottom_field_flag = ps_cur_slice->u1_bottom_field_flag;
    UWORD8 u1_field_pic_flag = ps_cur_slice->u1_field_pic_flag;
    /* high profile related declarations */
    high_profile_tools_t s_high_profile;
    WORD32 ret;

    H264_MUTEX_LOCK(&ps_dec->process_disp_mutex);

    /* check output buffer size given by the application */
    if(check_app_out_buf_size(ps_dec) != IV_SUCCESS)
        return IVD_DISP_FRM_ZERO_OP_BUF_SIZE;

    ps_prev_poc->i4_pic_order_cnt_lsb = ps_cur_poc->i4_pic_order_cnt_lsb;
    ps_prev_poc->i4_pic_order_cnt_msb = ps_cur_poc->i4_pic_order_cnt_msb;
    ps_prev_poc->i4_delta_pic_order_cnt_bottom =
                    ps_cur_poc->i4_delta_pic_order_cnt_bottom;
    ps_prev_poc->i4_delta_pic_order_cnt[0] =
                    ps_cur_poc->i4_delta_pic_order_cnt[0];
    ps_prev_poc->i4_delta_pic_order_cnt[1] =
                    ps_cur_poc->i4_delta_pic_order_cnt[1];
    ps_prev_poc->u1_bot_field = ps_dec->ps_cur_slice->u1_bottom_field_flag;
    ps_prev_poc->i4_prev_frame_num_ofst = ps_cur_poc->i4_prev_frame_num_ofst;
    ps_prev_poc->u2_frame_num = u2_frame_num;
    ps_dec->i1_prev_mb_qp_delta = 0;
    ps_dec->i1_next_ctxt_idx = 0;


    ps_dec->u4_nmb_deblk = 0;
    if(ps_dec->u4_num_cores == 1)
       ps_dec->u4_nmb_deblk = 1;



    if(ps_seq->u1_mb_aff_flag == 1)
    {
        ps_dec->u4_nmb_deblk = 0;
        if(ps_dec->u4_num_cores > 2)
            ps_dec->u4_num_cores = 2;
    }

        ps_dec->u4_use_intrapred_line_copy = 0;



    if (ps_seq->u1_mb_aff_flag == 0)
    {
        ps_dec->u4_use_intrapred_line_copy = 1;
    }

    ps_dec->u4_app_disable_deblk_frm = 0;
    /* If degrade is enabled, set the degrade flags appropriately */
    if(ps_dec->i4_degrade_type && ps_dec->i4_degrade_pics)
    {
        WORD32 degrade_pic;
        ps_dec->i4_degrade_pic_cnt++;
        degrade_pic = 0;

        /* If degrade is to be done in all frames, then do not check further */
        switch(ps_dec->i4_degrade_pics)
        {
            case 4:
            {
                degrade_pic = 1;
                break;
            }
            case 3:
            {
                if(ps_cur_slice->u1_slice_type != I_SLICE)
                    degrade_pic = 1;

                break;
            }
            case 2:
            {

                /* If pic count hits non-degrade interval or it is an islice, then do not degrade */
                if((ps_cur_slice->u1_slice_type != I_SLICE)
                                && (ps_dec->i4_degrade_pic_cnt
                                                != ps_dec->i4_nondegrade_interval))
                    degrade_pic = 1;

                break;
            }
            case 1:
            {
                /* Check if the current picture is non-ref */
                if(0 == ps_cur_slice->u1_nal_ref_idc)
                {
                    degrade_pic = 1;
                }
                break;
            }

        }
        if(degrade_pic)
        {
            if(ps_dec->i4_degrade_type & 0x2)
                ps_dec->u4_app_disable_deblk_frm = 1;

            /* MC degrading is done only for non-ref pictures */
            if(0 == ps_cur_slice->u1_nal_ref_idc)
            {
                if(ps_dec->i4_degrade_type & 0x4)
                    ps_dec->i4_mv_frac_mask = 0;

                if(ps_dec->i4_degrade_type & 0x8)
                    ps_dec->i4_mv_frac_mask = 0;
            }
        }
        else
            ps_dec->i4_degrade_pic_cnt = 0;
    }

    {
        dec_err_status_t * ps_err = ps_dec->ps_dec_err_status;
        if((ps_cur_slice->u1_slice_type == I_SLICE)
                        || (ps_cur_slice->u1_slice_type == SI_SLICE))
            ps_err->u1_cur_pic_type = PIC_TYPE_I;
        else
            ps_err->u1_cur_pic_type = PIC_TYPE_UNKNOWN;

        if(ps_err->u1_pic_aud_i == PIC_TYPE_I)
        {
            ps_err->u1_cur_pic_type = PIC_TYPE_I;
            ps_err->u1_pic_aud_i = PIC_TYPE_UNKNOWN;
        }

        if(ps_cur_slice->u1_nal_unit_type == IDR_SLICE_NAL)
        {
            if(ps_err->u1_err_flag)
                ih264d_reset_ref_bufs(ps_dec->ps_dpb_mgr);
            ps_err->u1_err_flag = ACCEPT_ALL_PICS;
        }
    }

    if(ps_dec->u1_init_dec_flag && ps_dec->s_prev_seq_params.u1_eoseq_pending)
    {
        /* Reset the decoder picture buffers */
        WORD32 j;
        for(j = 0; j < MAX_DISP_BUFS_NEW; j++)
        {

            ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                  j,
                                  BUF_MGR_REF);
            ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                  ps_dec->au1_pic_buf_id_mv_buf_id_map[j],
                                  BUF_MGR_REF);
            ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                  j,
                                  BUF_MGR_IO);
        }

        /* reset the decoder structure parameters related to buffer handling */
        ps_dec->u1_second_field = 0;
        ps_dec->i4_cur_display_seq = 0;

        /********************************************************************/
        /* indicate in the decoder output i4_status that some frames are being */
        /* dropped, so that it resets timestamp and wait for a new sequence */
        /********************************************************************/

        ps_dec->s_prev_seq_params.u1_eoseq_pending = 0;
    }
    ret = ih264d_init_pic(ps_dec, u2_frame_num, i4_poc, ps_pps);
    if(ret != OK)
        return ret;

    ps_dec->pv_parse_tu_coeff_data = ps_dec->pv_pic_tu_coeff_data;
    ps_dec->pv_proc_tu_coeff_data  = ps_dec->pv_pic_tu_coeff_data;
    ps_dec->ps_nmb_info = ps_dec->ps_frm_mb_info;
    if(ps_dec->u1_separate_parse)
    {
        UWORD16 pic_wd;
        UWORD16 pic_ht;
        UWORD32 num_mbs;

        pic_wd = ps_dec->u2_pic_wd;
        pic_ht = ps_dec->u2_pic_ht;
        num_mbs = (pic_wd * pic_ht) >> 8;

        if(ps_dec->pu1_dec_mb_map)
        {
            memset((void *)ps_dec->pu1_dec_mb_map, 0, num_mbs);
        }

        if(ps_dec->pu1_recon_mb_map)
        {

            memset((void *)ps_dec->pu1_recon_mb_map, 0, num_mbs);
        }

        if(ps_dec->pu2_slice_num_map)
        {
            memset((void *)ps_dec->pu2_slice_num_map, 0,
                   (num_mbs * sizeof(UWORD16)));
        }

    }

    ps_dec->ps_parse_cur_slice = &(ps_dec->ps_dec_slice_buf[0]);
    ps_dec->ps_decode_cur_slice = &(ps_dec->ps_dec_slice_buf[0]);
    ps_dec->ps_computebs_cur_slice = &(ps_dec->ps_dec_slice_buf[0]);
    ps_dec->u2_cur_slice_num = 0;

    /* Initialize all the HP toolsets to zero */
    ps_dec->s_high_profile.u1_scaling_present = 0;
    ps_dec->s_high_profile.u1_transform8x8_present = 0;

    /* Get Next Free Picture */
    if(1 == ps_dec->u4_share_disp_buf)
    {
        UWORD32 i;
        /* Free any buffer that is in the queue to be freed */
        for(i = 0; i < MAX_DISP_BUFS_NEW; i++)
        {
            if(0 == ps_dec->u4_disp_buf_to_be_freed[i])
                continue;
            ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr, i,
            BUF_MGR_IO);
            ps_dec->u4_disp_buf_to_be_freed[i] = 0;
            ps_dec->u4_disp_buf_mapping[i] = 0;

        }
    }
    if(!(u1_field_pic_flag && 0 != ps_dec->u1_top_bottom_decoded)) //ps_dec->u1_second_field))
    {
        pic_buffer_t *ps_cur_pic;
        WORD32 cur_pic_buf_id, cur_mv_buf_id;
        col_mv_buf_t *ps_col_mv;
        while(1)
        {
            ps_cur_pic = (pic_buffer_t *)ih264_buf_mgr_get_next_free(
                            (buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                            &cur_pic_buf_id);
            if(ps_cur_pic == NULL)
            {
                ps_dec->i4_error_code = ERROR_UNAVAIL_PICBUF_T;
                return ERROR_UNAVAIL_PICBUF_T;
            }
            if(0 == ps_dec->u4_disp_buf_mapping[cur_pic_buf_id])
            {
                break;
            }

        }
        ps_col_mv = (col_mv_buf_t *)ih264_buf_mgr_get_next_free((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                                               &cur_mv_buf_id);
        if(ps_col_mv == NULL)
        {
            ps_dec->i4_error_code = ERROR_UNAVAIL_MVBUF_T;
            return ERROR_UNAVAIL_MVBUF_T;
        }

        ps_dec->ps_cur_pic = ps_cur_pic;
        ps_dec->u1_pic_buf_id = cur_pic_buf_id;
        ps_cur_pic->u4_ts = ps_dec->u4_ts;


        ps_cur_pic->u1_mv_buf_id = cur_mv_buf_id;
        ps_dec->au1_pic_buf_id_mv_buf_id_map[cur_pic_buf_id] = cur_mv_buf_id;

        ps_cur_pic->pu1_col_zero_flag = (UWORD8 *)ps_col_mv->pv_col_zero_flag;
        ps_cur_pic->ps_mv = (mv_pred_t *)ps_col_mv->pv_mv;
        ps_dec->au1_pic_buf_ref_flag[cur_pic_buf_id] = 0;

        {
            /*make first entry of list0 and list1 point to cur pic,
             *so that if first slice is in error, ref pic struct will have valid entries*/
            ps_dec->ps_ref_pic_buf_lx[0] = ps_dec->ps_dpb_mgr->ps_init_dpb[0];
            ps_dec->ps_ref_pic_buf_lx[1] = ps_dec->ps_dpb_mgr->ps_init_dpb[1];
            *(ps_dec->ps_dpb_mgr->ps_init_dpb[0][0]) = *ps_cur_pic;
            /* Initialize for field reference as well */
            *(ps_dec->ps_dpb_mgr->ps_init_dpb[0][MAX_REF_BUFS]) = *ps_cur_pic;

            *(ps_dec->ps_dpb_mgr->ps_mod_dpb[0][0]) = *ps_cur_pic;
            /* Initialize for field reference as well */
            *(ps_dec->ps_dpb_mgr->ps_mod_dpb[0][MAX_REF_BUFS]) = *ps_cur_pic;
            *(ps_dec->ps_dpb_mgr->ps_init_dpb[1][0]) = *ps_cur_pic;
            /* Initialize for field reference as well */
            *(ps_dec->ps_dpb_mgr->ps_init_dpb[1][MAX_REF_BUFS]) = *ps_cur_pic;
            *(ps_dec->ps_dpb_mgr->ps_mod_dpb[1][0]) = *ps_cur_pic;
            /* Initialize for field reference as well */
            *(ps_dec->ps_dpb_mgr->ps_mod_dpb[1][MAX_REF_BUFS]) = *ps_cur_pic;
        }

        if(!ps_dec->ps_cur_pic)
        {
            WORD32 j;
            H264_DEC_DEBUG_PRINT("------- Display Buffers Reset --------\n");
            for(j = 0; j < MAX_DISP_BUFS_NEW; j++)
            {

                ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                      j,
                                      BUF_MGR_REF);
                ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                      ps_dec->au1_pic_buf_id_mv_buf_id_map[j],
                                      BUF_MGR_REF);
                ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                      j,
                                      BUF_MGR_IO);
            }

            ps_dec->i4_cur_display_seq = 0;
            ps_dec->i4_prev_max_display_seq = 0;
            ps_dec->i4_max_poc = 0;

            ps_cur_pic = (pic_buffer_t *)ih264_buf_mgr_get_next_free(
                            (buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                            &cur_pic_buf_id);
            if(ps_cur_pic == NULL)
            {
                ps_dec->i4_error_code = ERROR_UNAVAIL_PICBUF_T;
                return ERROR_UNAVAIL_PICBUF_T;
            }

            ps_col_mv = (col_mv_buf_t *)ih264_buf_mgr_get_next_free((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                                                   &cur_mv_buf_id);
            if(ps_col_mv == NULL)
            {
                ps_dec->i4_error_code = ERROR_UNAVAIL_MVBUF_T;
                return ERROR_UNAVAIL_MVBUF_T;
            }

            ps_dec->ps_cur_pic = ps_cur_pic;
            ps_dec->u1_pic_buf_id = cur_pic_buf_id;
            ps_cur_pic->u4_ts = ps_dec->u4_ts;
            ps_dec->apv_buf_id_pic_buf_map[cur_pic_buf_id] = (void *)ps_cur_pic;

            ps_cur_pic->u1_mv_buf_id = cur_mv_buf_id;
            ps_dec->au1_pic_buf_id_mv_buf_id_map[cur_pic_buf_id] = cur_mv_buf_id;

            ps_cur_pic->pu1_col_zero_flag = (UWORD8 *)ps_col_mv->pv_col_zero_flag;
            ps_cur_pic->ps_mv = (mv_pred_t *)ps_col_mv->pv_mv;
            ps_dec->au1_pic_buf_ref_flag[cur_pic_buf_id] = 0;

        }

        ps_dec->ps_cur_pic->u1_picturetype = u1_field_pic_flag;
        ps_dec->ps_cur_pic->u4_pack_slc_typ = SKIP_NONE;
        H264_DEC_DEBUG_PRINT("got a buffer\n");
    }
    else
    {
        H264_DEC_DEBUG_PRINT("did not get a buffer\n");
    }

    ps_dec->u4_pic_buf_got = 1;

    ps_dec->ps_cur_pic->i4_poc = i4_poc;
    ps_dec->ps_cur_pic->i4_frame_num = u2_frame_num;
    ps_dec->ps_cur_pic->i4_pic_num = u2_frame_num;
    ps_dec->ps_cur_pic->i4_top_field_order_cnt = ps_pps->i4_top_field_order_cnt;
    ps_dec->ps_cur_pic->i4_bottom_field_order_cnt =
                    ps_pps->i4_bottom_field_order_cnt;
    ps_dec->ps_cur_pic->i4_avg_poc = ps_pps->i4_avg_poc;
    ps_dec->ps_cur_pic->u4_time_stamp = ps_dec->u4_pts;

    ps_dec->s_cur_pic = *(ps_dec->ps_cur_pic);
    if(u1_field_pic_flag && u1_bottom_field_flag)
    {
        WORD32 i4_temp_poc;
        WORD32 i4_top_field_order_poc, i4_bot_field_order_poc;
        /* Point to odd lines, since it's bottom field */
        ps_dec->s_cur_pic.pu1_buf1 += ps_dec->s_cur_pic.u2_frm_wd_y;
        ps_dec->s_cur_pic.pu1_buf2 += ps_dec->s_cur_pic.u2_frm_wd_uv;
        ps_dec->s_cur_pic.pu1_buf3 += ps_dec->s_cur_pic.u2_frm_wd_uv;
        ps_dec->s_cur_pic.ps_mv +=
                        ((ps_dec->u2_pic_ht * ps_dec->u2_pic_wd) >> 5);
        ps_dec->s_cur_pic.pu1_col_zero_flag += ((ps_dec->u2_pic_ht
                        * ps_dec->u2_pic_wd) >> 5);
        ps_dec->ps_cur_pic->u1_picturetype |= BOT_FLD;
        i4_top_field_order_poc = ps_dec->ps_cur_pic->i4_top_field_order_cnt;
        i4_bot_field_order_poc = ps_dec->ps_cur_pic->i4_bottom_field_order_cnt;
        i4_temp_poc = MIN(i4_top_field_order_poc,
                                 i4_bot_field_order_poc);
        ps_dec->ps_cur_pic->i4_avg_poc = i4_temp_poc;
    }

    ps_cur_slice->u1_mbaff_frame_flag = ps_seq->u1_mb_aff_flag
                    && (!u1_field_pic_flag);

    ps_dec->ps_cur_pic->u1_picturetype |= (ps_cur_slice->u1_mbaff_frame_flag
                    << 2);

    ps_dec->ps_cur_mb_row = ps_dec->ps_nbr_mb_row; //[0];
    //Increment by 2 ,so that left mb (mbaff decrements by 2)  will always be valid
    ps_dec->ps_cur_mb_row += 2;
    ps_dec->ps_top_mb_row = ps_dec->ps_nbr_mb_row;
    ps_dec->ps_top_mb_row += ((ps_dec->u2_frm_wd_in_mbs + 2) << (1 - ps_dec->ps_cur_sps->u1_frame_mbs_only_flag));
    //Increment by 2 ,so that left mb (mbaff decrements by 2)  will always be valid
    ps_dec->ps_top_mb_row += 2;

    /* CHANGED CODE */
    ps_dec->ps_mv_cur = ps_dec->s_cur_pic.ps_mv;
    ps_dec->ps_mv_top = ps_dec->ps_mv_top_p[0];
    /* CHANGED CODE */
    ps_dec->u1_mv_top_p = 0;
    ps_dec->u1_mb_idx = 0;
    /* CHANGED CODE */
    ps_dec->ps_mv_left = ps_dec->s_cur_pic.ps_mv;
    ps_dec->u2_total_mbs_coded = 0;
    ps_dec->i4_submb_ofst = -(SUB_BLK_SIZE);
    ps_dec->u4_pred_info_idx = 0;
    ps_dec->u4_pred_info_pkd_idx = 0;
    ps_dec->u4_dma_buf_idx = 0;
    ps_dec->ps_mv = ps_dec->s_cur_pic.ps_mv;
    ps_dec->ps_mv_bank_cur = ps_dec->s_cur_pic.ps_mv;
    ps_dec->pu1_col_zero_flag = ps_dec->s_cur_pic.pu1_col_zero_flag;
    ps_dec->ps_part = ps_dec->ps_parse_part_params;
    ps_dec->i2_prev_slice_mbx = -1;
    ps_dec->i2_prev_slice_mby = 0;
    ps_dec->u2_mv_2mb[0] = 0;
    ps_dec->u2_mv_2mb[1] = 0;
    ps_dec->u1_last_pic_not_decoded = 0;

    ps_dec->u2_cur_slice_num_dec_thread = 0;
    ps_dec->u2_cur_slice_num_bs = 0;
    ps_dec->u4_intra_pred_line_ofst = 0;
    ps_dec->pu1_cur_y_intra_pred_line = ps_dec->pu1_y_intra_pred_line;
    ps_dec->pu1_cur_u_intra_pred_line = ps_dec->pu1_u_intra_pred_line;
    ps_dec->pu1_cur_v_intra_pred_line = ps_dec->pu1_v_intra_pred_line;

    ps_dec->pu1_cur_y_intra_pred_line_base = ps_dec->pu1_y_intra_pred_line;
    ps_dec->pu1_cur_u_intra_pred_line_base = ps_dec->pu1_u_intra_pred_line;
    ps_dec->pu1_cur_v_intra_pred_line_base = ps_dec->pu1_v_intra_pred_line;





    ps_dec->pu1_prev_y_intra_pred_line = ps_dec->pu1_y_intra_pred_line
                    + (ps_dec->u2_frm_wd_in_mbs * MB_SIZE);

    ps_dec->pu1_prev_u_intra_pred_line = ps_dec->pu1_u_intra_pred_line
                    + ps_dec->u2_frm_wd_in_mbs * BLK8x8SIZE * YUV420SP_FACTOR;
    ps_dec->pu1_prev_v_intra_pred_line = ps_dec->pu1_v_intra_pred_line
                    + ps_dec->u2_frm_wd_in_mbs * BLK8x8SIZE;

    ps_dec->ps_deblk_mbn = ps_dec->ps_deblk_pic;
    /* Initialize The Function Pointer Depending Upon the Entropy and MbAff Flag */
    {
        if(ps_cur_slice->u1_mbaff_frame_flag)
        {
            ps_dec->pf_compute_bs = ih264d_compute_bs_mbaff;
            ps_dec->pf_mvpred = ih264d_mvpred_mbaff;
        }
        else
        {
            ps_dec->pf_compute_bs = ih264d_compute_bs_non_mbaff;
            ps_dec->u1_cur_mb_fld_dec_flag = ps_cur_slice->u1_field_pic_flag;
        }
    }
    /* Set up the Parameter for DMA transfer */
    {
        UWORD8 u1_field_pic_flag = ps_dec->ps_cur_slice->u1_field_pic_flag;

        UWORD8 u1_mbaff = ps_cur_slice->u1_mbaff_frame_flag;

        UWORD8 uc_lastmbs = (((ps_dec->u2_pic_wd) >> 4)
                        % (ps_dec->u1_recon_mb_grp >> u1_mbaff));
        UWORD16 ui16_lastmbs_widthY =
                        (uc_lastmbs ? (uc_lastmbs << 4) : ((ps_dec->u1_recon_mb_grp
                                        >> u1_mbaff) << 4));
        UWORD16 ui16_lastmbs_widthUV =
                        uc_lastmbs ? (uc_lastmbs << 3) : ((ps_dec->u1_recon_mb_grp
                                        >> u1_mbaff) << 3);

        ps_dec->s_tran_addrecon.pu1_dest_y = ps_dec->s_cur_pic.pu1_buf1;
        ps_dec->s_tran_addrecon.pu1_dest_u = ps_dec->s_cur_pic.pu1_buf2;
        ps_dec->s_tran_addrecon.pu1_dest_v = ps_dec->s_cur_pic.pu1_buf3;

        ps_dec->s_tran_addrecon.u2_frm_wd_y = ps_dec->u2_frm_wd_y
                        << u1_field_pic_flag;
        ps_dec->s_tran_addrecon.u2_frm_wd_uv = ps_dec->u2_frm_wd_uv
                        << u1_field_pic_flag;

        if(u1_field_pic_flag)
        {
            ui16_lastmbs_widthY += ps_dec->u2_frm_wd_y;
            ui16_lastmbs_widthUV += ps_dec->u2_frm_wd_uv;
        }

        /* Normal Increment of Pointer */
        ps_dec->s_tran_addrecon.u4_inc_y[0] = ((ps_dec->u1_recon_mb_grp << 4)
                        >> u1_mbaff);
        ps_dec->s_tran_addrecon.u4_inc_uv[0] = ((ps_dec->u1_recon_mb_grp << 4)
                        >> u1_mbaff);

        /* End of Row Increment */
        ps_dec->s_tran_addrecon.u4_inc_y[1] = (ui16_lastmbs_widthY
                        + (PAD_LEN_Y_H << 1)
                        + ps_dec->s_tran_addrecon.u2_frm_wd_y
                                        * ((15 << u1_mbaff) + u1_mbaff));
        ps_dec->s_tran_addrecon.u4_inc_uv[1] = (ui16_lastmbs_widthUV
                        + (PAD_LEN_UV_H << 2)
                        + ps_dec->s_tran_addrecon.u2_frm_wd_uv
                                        * ((15 << u1_mbaff) + u1_mbaff));

        /* Assign picture numbers to each frame/field  */
        /* only once per picture.                      */
        ih264d_assign_pic_num(ps_dec);
        ps_dec->s_tran_addrecon.u2_mv_top_left_inc = (ps_dec->u1_recon_mb_grp
                        << 2) - 1 - (u1_mbaff << 2);
        ps_dec->s_tran_addrecon.u2_mv_left_inc = ((ps_dec->u1_recon_mb_grp
                        >> u1_mbaff) - 1) << (4 + u1_mbaff);
    }
    /**********************************************************************/
    /* High profile related initialization at pictrue level               */
    /**********************************************************************/
    if(ps_seq->u1_profile_idc == HIGH_PROFILE_IDC)
    {
        if((ps_seq->i4_seq_scaling_matrix_present_flag)
                        || (ps_pps->i4_pic_scaling_matrix_present_flag))
        {
            ret = ih264d_form_scaling_matrix_picture(ps_seq, ps_pps, ps_dec);
            ps_dec->s_high_profile.u1_scaling_present = 1;
        }
        else
        {
            ret = ih264d_form_default_scaling_matrix(ps_dec);
        }

        if(ps_pps->i4_transform_8x8_mode_flag)
        {
            ps_dec->s_high_profile.u1_transform8x8_present = 1;
        }
    }
    else
    {
        ret = ih264d_form_default_scaling_matrix(ps_dec);
    }
    
    if(ret != OK)
        return ret;
 
    /* required while reading the transform_size_8x8 u4_flag */
    ps_dec->s_high_profile.u1_direct_8x8_inference_flag =
                    ps_seq->u1_direct_8x8_inference_flag;
    ps_dec->s_high_profile.s_cavlc_ctxt = ps_dec->s_cavlc_ctxt;

    ps_dec->i1_recon_in_thread3_flag = 1;
    ps_dec->ps_frame_buf_ip_recon = &ps_dec->s_tran_addrecon;
    if(ps_dec->u1_separate_parse)
    {
        memcpy(&ps_dec->s_tran_addrecon_parse, &ps_dec->s_tran_addrecon,
               sizeof(tfr_ctxt_t));
        if(ps_dec->u4_num_cores >= 3 && ps_dec->i1_recon_in_thread3_flag)
        {
            memcpy(&ps_dec->s_tran_iprecon, &ps_dec->s_tran_addrecon,
                   sizeof(tfr_ctxt_t));
            ps_dec->ps_frame_buf_ip_recon = &ps_dec->s_tran_iprecon;
        }
    }


    ih264d_init_deblk_tfr_ctxt(ps_dec,&(ps_dec->s_pad_mgr), &(ps_dec->s_tran_addrecon),
                               ps_dec->u2_frm_wd_in_mbs, 0);

    ps_dec->ps_cur_deblk_mb = ps_dec->ps_deblk_pic;
    ps_dec->u4_cur_deblk_mb_num = 0;

    ps_dec->u4_deblk_mb_x = 0;
    ps_dec->u4_deblk_mb_y = 0;
    ps_dec->pu4_wt_ofsts = ps_dec->pu4_wts_ofsts_mat;

    ps_dec->u4_first_slice_in_pic = 0;
    H264_MUTEX_UNLOCK(&ps_dec->process_disp_mutex);
    return OK;
}

/*!
 **************************************************************************
 * \if Function name :  ih264d_deblock_display \endif
 *
 * \brief            :  The function callls the deblocking routine and manages
 :  the Recon buffers and displays .
 * \return           :  Nothing
 *
 **************************************************************************
 */
WORD32 ih264d_end_of_pic_dispbuf_mgr(dec_struct_t * ps_dec)
{
    dec_slice_params_t *ps_cur_slice = ps_dec->ps_cur_slice;
    UWORD8 u1_num_of_users = 0;
    WORD32 ret;

    H264_MUTEX_LOCK(&ps_dec->process_disp_mutex);
    if(1)
    {

        {
            ih264d_delete_nonref_nondisplay_pics(ps_dec->ps_dpb_mgr);
            if(ps_cur_slice->u1_mmco_equalto5
                            || (ps_cur_slice->u1_nal_unit_type == IDR_SLICE_NAL))
            {
                ps_dec->ps_cur_pic->i4_poc = 0;
                if(ps_dec->u2_total_mbs_coded
                                == (ps_dec->ps_cur_sps->u2_max_mb_addr + 1))
                    ih264d_reset_ref_bufs(ps_dec->ps_dpb_mgr);
                ih264d_release_display_bufs(ps_dec);
            }
            if(IVD_DECODE_FRAME_OUT != ps_dec->e_frm_out_mode)
            {
                ret = ih264d_assign_display_seq(ps_dec);
                if(ret != OK)
                    return ret;
            }
        }

        if(ps_cur_slice->u1_nal_ref_idc)
        {
            /* Mark pic buf as needed for reference */
            ih264_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                     ps_dec->u1_pic_buf_id,
                                     BUF_MGR_REF);
            /* Mark mv buf as needed for reference */
            ih264_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                     ps_dec->au1_pic_buf_id_mv_buf_id_map[ps_dec->u1_pic_buf_id],
                                     BUF_MGR_REF);
            ps_dec->au1_pic_buf_ref_flag[ps_dec->u1_pic_buf_id] = 1;
        }

        /* 420 consumer */
        /* Increment the number of users by 1 for display based upon */
        /*the SEEK KEY FRAME control sent to decoder                 */
        if(((0 == ps_dec->u1_last_pic_not_decoded)
                        && (0
                                        == (ps_dec->ps_cur_pic->u4_pack_slc_typ
                                                        & ps_dec->u4_skip_frm_mask)))
                        || (ps_cur_slice->u1_nal_unit_type == IDR_SLICE_NAL))
        {
            /* Mark pic buf as needed for display */
            ih264_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                                     ps_dec->u1_pic_buf_id,
                                     BUF_MGR_IO);

        }

        if(!ps_cur_slice->u1_field_pic_flag
                        || ((TOP_FIELD_ONLY | BOT_FIELD_ONLY)
                                        != ps_dec->u1_top_bottom_decoded))
        {
            pic_buffer_t *ps_cur_pic = ps_dec->ps_cur_pic;
            ps_cur_pic->u2_disp_width = ps_dec->u2_disp_width;
            ps_cur_pic->u2_disp_height = ps_dec->u2_disp_height >> 1;

            ps_cur_pic->u2_crop_offset_y = ps_dec->u2_crop_offset_y;
            ps_cur_pic->u2_crop_offset_uv = ps_dec->u2_crop_offset_uv;
            ps_cur_pic->u1_pic_type = 0;
            {
                UWORD64 i8_display_poc;
                i8_display_poc = (UWORD64)ps_dec->i4_prev_max_display_seq +
                            ps_dec->ps_cur_pic->i4_poc;
                if(IS_OUT_OF_RANGE_S32(i8_display_poc))
                {
                    ps_dec->i4_prev_max_display_seq = 0;
                }
            }
            ret = ih264d_insert_pic_in_display_list(
                            ps_dec->ps_dpb_mgr,
                            ps_dec->u1_pic_buf_id,
                            ps_dec->i4_prev_max_display_seq
                                            + ps_dec->ps_cur_pic->i4_poc,
                            ps_dec->ps_cur_pic->i4_frame_num);
            if(ret != OK)
                return ret;

            {
                ivd_video_decode_op_t * ps_dec_output =
                                (ivd_video_decode_op_t *)ps_dec->pv_dec_out;

                ps_dec_output->u4_frame_decoded_flag = 1;
            }
            if(ps_dec->au1_pic_buf_ref_flag[ps_dec->u1_pic_buf_id] == 0)
            {
                ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                                      ps_dec->au1_pic_buf_id_mv_buf_id_map[ps_dec->u1_pic_buf_id],
                                      BUF_MGR_REF);
                ps_dec->au1_pic_buf_ref_flag[ps_dec->u1_pic_buf_id] = 0;

            }
        }
        else
        {
            H264_DEC_DEBUG_PRINT("pic not inserted display %d %d\n",
                                 ps_cur_slice->u1_field_pic_flag,
                                 ps_dec->u1_second_field);
        }

        if(!ps_cur_slice->u1_field_pic_flag
                        || ((TOP_FIELD_ONLY | BOT_FIELD_ONLY)
                                        == ps_dec->u1_top_bottom_decoded))
        {
            if(IVD_DECODE_FRAME_OUT == ps_dec->e_frm_out_mode)
            {
                ret = ih264d_assign_display_seq(ps_dec);
                if(ret != OK)
                    return ret;
            }
        }
    }

    H264_MUTEX_UNLOCK(&ps_dec->process_disp_mutex);

    return OK;
}

void ih264d_err_pic_dispbuf_mgr(dec_struct_t *ps_dec)
{
    dec_slice_params_t *ps_cur_slice = ps_dec->ps_cur_slice;
    ivd_video_decode_op_t * ps_dec_output =
                    (ivd_video_decode_op_t *)ps_dec->pv_dec_out;

    ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                          ps_dec->u1_pic_buf_id,
                          BUF_MGR_REF);
    ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_mv_buf_mgr,
                          ps_dec->au1_pic_buf_id_mv_buf_id_map[ps_dec->u1_pic_buf_id],
                          BUF_MGR_REF);
    ih264_buf_mgr_release((buf_mgr_t *)ps_dec->pv_pic_buf_mgr,
                          ps_dec->u1_pic_buf_id,
                          BUF_MGR_IO);
}

void ih264d_deblock_picture(void *ptr)
{
    dec_struct_t *ps_dec = (dec_struct_t *)ptr;

    {
        /*Deblock picture only if all the mb's in the frame have been decoded*/
        if(ps_dec->u1_pic_decode_done == 1)
        {
            if(ps_dec->ps_cur_slice->u1_mbaff_frame_flag
                            || ps_dec->ps_cur_slice->u1_field_pic_flag)
            {
                ps_dec->p_DeblockPicture[ps_dec->ps_cur_slice->u1_mbaff_frame_flag](
                                ps_dec);
            }
            else

            {

                ih264d_deblock_picture_progressive(ps_dec);
            }

        }
    }

}

/*!
 **************************************************************************
 * \if Function name :  ih264d_deblock_display \endif
 *
 * \brief            :  The function callls the deblocking routine and manages
 :  the Recon buffers and displays .
 * \return           :  Nothing
 *
 **************************************************************************
 */
WORD32 ih264d_deblock_display(dec_struct_t *ps_dec)
{
    WORD32 ret;
    /* Call deblocking */
    ih264d_deblock_picture(ps_dec);

    ret = ih264d_end_of_pic_dispbuf_mgr(ps_dec);
    if(ret != OK)
        return ret;

    return OK;
}

/*
 *!
 **************************************************************************
 * \if Function name : EndofPoc \endif
 *
 * \brief
 *    EndofPoc Processing
 *
 * \return
 *    0 on Success and Error code otherwise
 **************************************************************************
 */

WORD32 ih264d_end_of_pic(dec_struct_t *ps_dec)
{
    dec_slice_params_t *ps_cur_slice = ps_dec->ps_cur_slice;
    WORD32 ret;

    {
        dec_err_status_t * ps_err = ps_dec->ps_dec_err_status;
        if(ps_err->u1_err_flag & REJECT_CUR_PIC)
        {
            ih264d_err_pic_dispbuf_mgr(ps_dec);
            return ERROR_NEW_FRAME_EXPECTED;
        }
    }

    H264_MUTEX_LOCK(&ps_dec->process_disp_mutex);
    ret = ih264d_end_of_pic_processing(ps_dec);
    if(ret != OK)
        return ret;
    /*--------------------------------------------------------------------*/
    /* ih264d_decode_pic_order_cnt - calculate the Pic Order Cnt                    */
    /* Needed to detect end of picture                                    */
    /*--------------------------------------------------------------------*/

    H264_MUTEX_UNLOCK(&ps_dec->process_disp_mutex);

    return OK;
}


/*!
 **************************************************************************
 * \if Function name : ih264d_fix_error_in_dpb \endif
 *
 * \brief
 *    fix error in DPB
 *
 * \return
 *    Number of node(s) deleted
 **************************************************************************
 */

WORD32 ih264d_fix_error_in_dpb(dec_struct_t *ps_dec)
{
    /*--------------------------------------------------------------------*/
    /* If there is common node in lt_list and st_list then delete it from */
    /* st_list                                                            */
    /*--------------------------------------------------------------------*/
    UWORD8 no_of_nodes_deleted = 0;
    UWORD8 lt_ref_num = ps_dec->ps_dpb_mgr->u1_num_lt_ref_bufs;
    struct dpb_info_t *ps_lt_curr_dpb = ps_dec->ps_dpb_mgr->ps_dpb_ht_head;
    while(lt_ref_num && ps_lt_curr_dpb)
    {
        if(ps_dec->ps_dpb_mgr->ps_dpb_st_head
                && ((ps_lt_curr_dpb->s_bot_field.u1_reference_info
                        | ps_lt_curr_dpb->s_top_field.u1_reference_info)
                        == (IS_SHORT_TERM | IS_LONG_TERM)))
        {
            struct dpb_info_t *ps_st_next_dpb = ps_dec->ps_dpb_mgr->ps_dpb_st_head;
            struct dpb_info_t *ps_st_curr_dpb = ps_dec->ps_dpb_mgr->ps_dpb_st_head;
            UWORD8 st_ref_num = ps_dec->ps_dpb_mgr->u1_num_st_ref_bufs;
            while(st_ref_num && ps_st_curr_dpb)
            {
                if(ps_st_curr_dpb == ps_lt_curr_dpb)
                {
                    if(st_ref_num == ps_dec->ps_dpb_mgr->u1_num_st_ref_bufs)
                    {
                        ps_dec->ps_dpb_mgr->ps_dpb_st_head =
                                ps_dec->ps_dpb_mgr->ps_dpb_st_head->ps_prev_short;
                        ps_st_curr_dpb = ps_dec->ps_dpb_mgr->ps_dpb_st_head;
                    }
                    else
                    {
                        ps_st_next_dpb->ps_prev_short = ps_st_curr_dpb->ps_prev_short;
                    }
                    ps_dec->ps_dpb_mgr->u1_num_st_ref_bufs--;
                    ps_dec->ps_dpb_mgr->u1_num_lt_ref_bufs++;
                    no_of_nodes_deleted++;
                    break;
                }
                ps_st_next_dpb = ps_st_curr_dpb;
                ps_st_curr_dpb = ps_st_curr_dpb->ps_prev_short;
                st_ref_num--;
            }
        }
        ps_lt_curr_dpb = ps_lt_curr_dpb->ps_prev_long;
        lt_ref_num--;
    }
    return no_of_nodes_deleted;
}


/*!
 **************************************************************************
 * \if Function name : DecodeSlice \endif
 *
 * \brief
 *    Parses a slice
 *
 * \return
 *    0 on Success and Error code otherwise
 **************************************************************************
 */

WORD32 ih264d_parse_decode_slice(UWORD8 u1_is_idr_slice,
                                 UWORD8 u1_nal_ref_idc,
                                 dec_struct_t *ps_dec /* Decoder parameters */
                                 )
{
    dec_bit_stream_t * ps_bitstrm = ps_dec->ps_bitstrm;
    dec_pic_params_t *ps_pps;
    dec_seq_params_t *ps_seq;
    dec_slice_params_t *ps_cur_slice = ps_dec->ps_cur_slice;
    pocstruct_t s_tmp_poc = {0};
    WORD32 i_delta_poc[2];
    WORD32 i4_poc = 0;
    UWORD16 u2_first_mb_in_slice, u2_frame_num;
    UWORD8 u1_field_pic_flag, u1_redundant_pic_cnt = 0, u1_slice_type;
    UWORD32 u4_idr_pic_id = 0;
    UWORD8 u1_bottom_field_flag, u1_pic_order_cnt_type;

    UWORD8 u1_nal_unit_type;
    UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
    UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
    WORD8 i1_is_end_of_poc;

    WORD32 ret, end_of_frame;
    WORD32 prev_slice_err, num_mb_skipped;
    UWORD8 u1_mbaff;
    pocstruct_t *ps_cur_poc;

    UWORD32 u4_temp;
    WORD32 i_temp;
    UWORD32 u4_call_end_of_pic = 0;

    /* read FirstMbInSlice  and slice type*/
    ps_dec->ps_dpb_cmds->u1_dpb_commands_read_slc = 0;
    u2_first_mb_in_slice = ih264d_uev(pu4_bitstrm_ofst,
                                     pu4_bitstrm_buf);
    if(u2_first_mb_in_slice
                    > (ps_dec->u2_frm_ht_in_mbs * ps_dec->u2_frm_wd_in_mbs))
    {

        return ERROR_CORRUPTED_SLICE;
    }

    /*we currently don not support ASO*/
    if(((u2_first_mb_in_slice << ps_cur_slice->u1_mbaff_frame_flag)
                    <= ps_dec->u2_cur_mb_addr) && (ps_dec->u4_first_slice_in_pic == 0))
    {
        return ERROR_CORRUPTED_SLICE;
    }

    COPYTHECONTEXT("SH: first_mb_in_slice",u2_first_mb_in_slice);

    u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);

    if(u4_temp > 9)
        return ERROR_INV_SLC_TYPE_T;

    u1_slice_type = u4_temp;
    COPYTHECONTEXT("SH: slice_type",(u1_slice_type));
    /* Find Out the Slice Type is 5 to 9 or not then Set the Flag   */
    /* u1_sl_typ_5_9 = 1 .Which tells that all the slices in the Pic*/
    /* will be of same type of current                            */
    if(u1_slice_type > 4)
    {
        u1_slice_type -= 5;
    }

    u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
    if(u4_temp & MASK_ERR_PIC_SET_ID)
        return ERROR_INV_SLICE_HDR_T;
    /* discard slice if pic param is invalid */
    COPYTHECONTEXT("SH: pic_parameter_set_id", u4_temp);
    ps_pps = &ps_dec->ps_pps[u4_temp];
    if(FALSE == ps_pps->u1_is_valid)
    {
        return ERROR_INV_SLICE_HDR_T;
    }
    ps_seq = ps_pps->ps_sps;
    if(!ps_seq)
        return ERROR_INV_SLICE_HDR_T;
    if(FALSE == ps_seq->u1_is_valid)
        return ERROR_INV_SLICE_HDR_T;

    /* Get the frame num */
    u2_frame_num = ih264d_get_bits_h264(ps_bitstrm,
                                         ps_seq->u1_bits_in_frm_num);
//    H264_DEC_DEBUG_PRINT("FRAME %d First MB in slice: %d\n", u2_frame_num, u2_first_mb_in_slice);

    COPYTHECONTEXT("SH: frame_num", u2_frame_num);
//    H264_DEC_DEBUG_PRINT("Second field: %d frame num: %d prv_frame_num: %d \n", ps_dec->u1_second_field, u2_frame_num, ps_dec->u2_prv_frame_num);
    if(!ps_dec->u1_first_slice_in_stream && ps_dec->u4_first_slice_in_pic)
    {
        pocstruct_t *ps_prev_poc = &ps_dec->s_prev_pic_poc;
        pocstruct_t *ps_cur_poc = &ps_dec->s_cur_pic_poc;

        ps_dec->u2_mbx = 0xffff;
        ps_dec->u2_mby = 0;

        if((0 == u1_is_idr_slice) && ps_cur_slice->u1_nal_ref_idc)
            ps_dec->u2_prev_ref_frame_num = ps_cur_slice->u2_frame_num;

        if(u1_is_idr_slice || ps_cur_slice->u1_mmco_equalto5)
            ps_dec->u2_prev_ref_frame_num = 0;

        if(ps_dec->ps_cur_sps->u1_gaps_in_frame_num_value_allowed_flag)
        {
            ih264d_decode_gaps_in_frame_num(ps_dec, u2_frame_num);
        }

        ps_prev_poc->i4_prev_frame_num_ofst = ps_cur_poc->i4_prev_frame_num_ofst;
        ps_prev_poc->u2_frame_num = ps_cur_poc->u2_frame_num;
        ps_prev_poc->u1_mmco_equalto5 = ps_cur_slice->u1_mmco_equalto5;
        if(ps_cur_slice->u1_nal_ref_idc)
        {
            ps_prev_poc->i4_pic_order_cnt_lsb = ps_cur_poc->i4_pic_order_cnt_lsb;
            ps_prev_poc->i4_pic_order_cnt_msb = ps_cur_poc->i4_pic_order_cnt_msb;
            ps_prev_poc->i4_delta_pic_order_cnt_bottom =
                            ps_cur_poc->i4_delta_pic_order_cnt_bottom;
            ps_prev_poc->i4_delta_pic_order_cnt[0] =
                            ps_cur_poc->i4_delta_pic_order_cnt[0];
            ps_prev_poc->i4_delta_pic_order_cnt[1] =
                            ps_cur_poc->i4_delta_pic_order_cnt[1];
            ps_prev_poc->u1_bot_field = ps_cur_poc->u1_bot_field;
        }

        ps_dec->u2_total_mbs_coded = 0;
    }
    /* Get the field related flags  */
    if(!ps_seq->u1_frame_mbs_only_flag)
    {

        u1_field_pic_flag = ih264d_get_bit_h264(ps_bitstrm);
        COPYTHECONTEXT("SH: field_pic_flag", u1_field_pic_flag);
        u1_bottom_field_flag = 0;

        if(u1_field_pic_flag)
        {
            ps_dec->pu1_inv_scan = (UWORD8 *)gau1_ih264d_inv_scan_fld;
            u1_bottom_field_flag = ih264d_get_bit_h264(ps_bitstrm);
            COPYTHECONTEXT("SH: bottom_field_flag", u1_bottom_field_flag);

        }
        else
        {
            ps_dec->pu1_inv_scan = (UWORD8 *)gau1_ih264d_inv_scan;
        }
    }
    else
    {
        u1_field_pic_flag = 0;
        u1_bottom_field_flag = 0;

        ps_dec->pu1_inv_scan = (UWORD8 *)gau1_ih264d_inv_scan;
    }

    u1_nal_unit_type = SLICE_NAL;
    if(u1_is_idr_slice)
    {
        u1_nal_unit_type = IDR_SLICE_NAL;
        u4_idr_pic_id = ih264d_uev(pu4_bitstrm_ofst,
                                   pu4_bitstrm_buf);
        if(u4_idr_pic_id > 65535)
            return ERROR_INV_SLICE_HDR_T;
        COPYTHECONTEXT("SH:  ", u4_idr_pic_id);
    }

    /* read delta pic order count information*/
    i_delta_poc[0] = i_delta_poc[1] = 0;
    s_tmp_poc.i4_pic_order_cnt_lsb = 0;
    s_tmp_poc.i4_delta_pic_order_cnt_bottom = 0;
    u1_pic_order_cnt_type = ps_seq->u1_pic_order_cnt_type;
    if(u1_pic_order_cnt_type == 0)
    {
        i_temp = ih264d_get_bits_h264(
                        ps_bitstrm,
                        ps_seq->u1_log2_max_pic_order_cnt_lsb_minus);
        if(i_temp < 0 || i_temp >= ps_seq->i4_max_pic_order_cntLsb)
            return ERROR_INV_SLICE_HDR_T;
        s_tmp_poc.i4_pic_order_cnt_lsb = i_temp;
        COPYTHECONTEXT("SH: pic_order_cnt_lsb", s_tmp_poc.i4_pic_order_cnt_lsb);

        if((ps_pps->u1_pic_order_present_flag == 1) && (!u1_field_pic_flag))
        {
            s_tmp_poc.i4_delta_pic_order_cnt_bottom = ih264d_sev(
                            pu4_bitstrm_ofst, pu4_bitstrm_buf);
            //if(s_tmp_poc.i4_delta_pic_order_cnt_bottom > ps_seq->i4_max_pic_order_cntLsb)
            COPYTHECONTEXT("SH: delta_pic_order_cnt_bottom",
                            s_tmp_poc.i4_delta_pic_order_cnt_bottom);
        }
    }

    s_tmp_poc.i4_delta_pic_order_cnt[0] = 0;
    s_tmp_poc.i4_delta_pic_order_cnt[1] = 0;
    if(u1_pic_order_cnt_type == 1
                    && (!ps_seq->u1_delta_pic_order_always_zero_flag))
    {
        s_tmp_poc.i4_delta_pic_order_cnt[0] = ih264d_sev(pu4_bitstrm_ofst,
                                                         pu4_bitstrm_buf);
        COPYTHECONTEXT("SH: delta_pic_order_cnt[0]",
                        s_tmp_poc.i4_delta_pic_order_cnt[0]);

        if(ps_pps->u1_pic_order_present_flag && !u1_field_pic_flag)
        {
            s_tmp_poc.i4_delta_pic_order_cnt[1] = ih264d_sev(
                            pu4_bitstrm_ofst, pu4_bitstrm_buf);
            COPYTHECONTEXT("SH: delta_pic_order_cnt[1]",
                            s_tmp_poc.i4_delta_pic_order_cnt[1]);
        }
    }

    if(ps_pps->u1_redundant_pic_cnt_present_flag)
    {
        u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
        if(u4_temp > MAX_REDUNDANT_PIC_CNT)
            return ERROR_INV_SLICE_HDR_T;
        u1_redundant_pic_cnt = u4_temp;
        COPYTHECONTEXT("SH: redundant_pic_cnt", u1_redundant_pic_cnt);
    }

    /*--------------------------------------------------------------------*/
    /* Check if the slice is part of new picture                          */
    /*--------------------------------------------------------------------*/
    /* First slice of a picture is always considered as part of new picture */
    i1_is_end_of_poc = 1;
    ps_dec->ps_dec_err_status->u1_err_flag &= MASK_REJECT_CUR_PIC;

    if(ps_dec->u4_first_slice_in_pic == 0)
    {
        i1_is_end_of_poc = ih264d_is_end_of_pic(u2_frame_num, u1_nal_ref_idc,
                                            &s_tmp_poc, &ps_dec->s_cur_pic_poc,
                                            ps_cur_slice, u1_pic_order_cnt_type,
                                            u1_nal_unit_type, u4_idr_pic_id,
                                            u1_field_pic_flag,
                                            u1_bottom_field_flag);
        if(i1_is_end_of_poc)
        {
            ps_dec->u1_first_slice_in_stream = 0;
            return ERROR_INCOMPLETE_FRAME;
        }

    }

    /*--------------------------------------------------------------------*/
    /* Check for error in slice and parse the missing/corrupted MB's      */
    /* as skip-MB's in an inserted P-slice                                */
    /*--------------------------------------------------------------------*/
    u1_mbaff = ps_seq->u1_mb_aff_flag && (!u1_field_pic_flag);
    prev_slice_err = 0;

    if(i1_is_end_of_poc || ps_dec->u1_first_slice_in_stream)
    {
        if(u2_frame_num != ps_dec->u2_prv_frame_num
               && ps_dec->u1_top_bottom_decoded != 0
                   && ps_dec->u1_top_bottom_decoded
                       != (TOP_FIELD_ONLY | BOT_FIELD_ONLY))
        {
            ps_dec->u1_dangling_field = 1;
            if(ps_dec->u4_first_slice_in_pic)
            {
                // first slice - dangling field
                prev_slice_err = 1;
            }
            else
            {
                // last slice - dangling field
                prev_slice_err = 2;
            }

            if(ps_dec->u1_top_bottom_decoded ==TOP_FIELD_ONLY)
                ps_cur_slice->u1_bottom_field_flag = 1;
            else
                ps_cur_slice->u1_bottom_field_flag = 0;

            num_mb_skipped = (ps_dec->u2_frm_ht_in_mbs * ps_dec->u2_frm_wd_in_mbs)
                    - ps_dec->u2_total_mbs_coded;
            ps_cur_poc = &ps_dec->s_cur_pic_poc;

            u1_is_idr_slice = ps_cur_slice->u1_nal_unit_type == IDR_SLICE_NAL;
        }
        else if(ps_dec->u4_first_slice_in_pic)
        {
            if(u2_first_mb_in_slice > 0)
            {
                // first slice - missing/header corruption
                prev_slice_err = 1;
                num_mb_skipped = u2_first_mb_in_slice << u1_mbaff;
                ps_cur_poc = &s_tmp_poc;

                // initializing slice parameters
                ps_cur_slice->u4_idr_pic_id = u4_idr_pic_id;
                ps_cur_slice->u1_field_pic_flag = u1_field_pic_flag;
                ps_cur_slice->u1_bottom_field_flag = u1_bottom_field_flag;
                ps_cur_slice->i4_pic_order_cnt_lsb =
                        s_tmp_poc.i4_pic_order_cnt_lsb;
                ps_cur_slice->u1_nal_unit_type = u1_nal_unit_type;
                ps_cur_slice->u1_redundant_pic_cnt = u1_redundant_pic_cnt;
                ps_cur_slice->u1_nal_ref_idc = u1_nal_ref_idc;
                ps_cur_slice->u1_pic_order_cnt_type = u1_pic_order_cnt_type;
                ps_cur_slice->u1_mbaff_frame_flag = ps_seq->u1_mb_aff_flag
                        && (!u1_field_pic_flag);
            }
        }
        else
        {
            /* since i1_is_end_of_poc is set ,means new frame num is encountered. so conceal the current frame
             * completely */
            prev_slice_err = 2;
            num_mb_skipped = (ps_dec->u2_frm_ht_in_mbs
                            * ps_dec->u2_frm_wd_in_mbs)
                            - ps_dec->u2_total_mbs_coded;
            ps_cur_poc = &s_tmp_poc;
        }
    }
    else
    {
        if((u2_first_mb_in_slice << u1_mbaff) > ps_dec->u2_total_mbs_coded)
        {
            // previous slice - missing/corruption
            prev_slice_err = 2;
            num_mb_skipped = (u2_first_mb_in_slice << u1_mbaff)
                    - ps_dec->u2_total_mbs_coded;
            ps_cur_poc = &s_tmp_poc;
        }
        else if((u2_first_mb_in_slice << u1_mbaff) < ps_dec->u2_total_mbs_coded)
        {
            return ERROR_CORRUPTED_SLICE;
        }
    }

    if(prev_slice_err)
    {
        ret = ih264d_mark_err_slice_skip(ps_dec, num_mb_skipped, u1_is_idr_slice, u2_frame_num, ps_cur_poc, prev_slice_err);

        if(ps_dec->u1_dangling_field == 1)
        {
            ps_dec->u1_second_field = 1 - ps_dec->u1_second_field;
            ps_dec->u1_first_slice_in_stream = 0;
            ps_dec->u1_top_bottom_decoded = TOP_FIELD_ONLY | BOT_FIELD_ONLY;
            return ERROR_DANGLING_FIELD_IN_PIC;
        }

        if(prev_slice_err == 2)
        {
            ps_dec->u1_first_slice_in_stream = 0;
            return ERROR_INCOMPLETE_FRAME;
        }

        if(ps_dec->u2_total_mbs_coded
                >= ps_dec->u2_frm_ht_in_mbs * ps_dec->u2_frm_wd_in_mbs)
        {
            /* return if all MBs in frame are parsed*/
            ps_dec->u1_first_slice_in_stream = 0;
            return ERROR_IN_LAST_SLICE_OF_PIC;
        }

        if(ps_dec->ps_dec_err_status->u1_err_flag & REJECT_CUR_PIC)
        {
            ih264d_err_pic_dispbuf_mgr(ps_dec);
            return ERROR_NEW_FRAME_EXPECTED;
        }

        if(ret != OK)
            return ret;

        i1_is_end_of_poc = 0;
    }

    if (ps_dec->u4_first_slice_in_pic == 0)
    {
        ps_dec->ps_parse_cur_slice++;
        ps_dec->u2_cur_slice_num++;
    }

    // in the case of single core increment ps_decode_cur_slice
    if((ps_dec->u1_separate_parse == 0) && (ps_dec->u4_first_slice_in_pic == 0))
    {
        ps_dec->ps_decode_cur_slice++;
    }
    ps_dec->u1_slice_header_done = 0;


    if(u1_field_pic_flag)
    {
        ps_dec->u2_prv_frame_num = u2_frame_num;
    }

    if(ps_cur_slice->u1_mmco_equalto5)
    {
        WORD32 i4_temp_poc;
        WORD32 i4_top_field_order_poc, i4_bot_field_order_poc;

        if(!ps_cur_slice->u1_field_pic_flag) // or a complementary field pair
        {
            i4_top_field_order_poc = ps_dec->ps_cur_pic->i4_top_field_order_cnt;
            i4_bot_field_order_poc =
                            ps_dec->ps_cur_pic->i4_bottom_field_order_cnt;
            i4_temp_poc = MIN(i4_top_field_order_poc,
                                     i4_bot_field_order_poc);
        }
        else if(!ps_cur_slice->u1_bottom_field_flag)
            i4_temp_poc = ps_dec->ps_cur_pic->i4_top_field_order_cnt;
        else
            i4_temp_poc = ps_dec->ps_cur_pic->i4_bottom_field_order_cnt;

        ps_dec->ps_cur_pic->i4_top_field_order_cnt = i4_temp_poc
                        - ps_dec->ps_cur_pic->i4_top_field_order_cnt;
        ps_dec->ps_cur_pic->i4_bottom_field_order_cnt = i4_temp_poc
                        - ps_dec->ps_cur_pic->i4_bottom_field_order_cnt;
        ps_dec->ps_cur_pic->i4_poc = i4_temp_poc;
        ps_dec->ps_cur_pic->i4_avg_poc = i4_temp_poc;
    }
    if(ps_dec->u4_first_slice_in_pic)
    {
        ret = ih264d_decode_pic_order_cnt(u1_is_idr_slice, u2_frame_num,
                                          &ps_dec->s_prev_pic_poc,
                                          &s_tmp_poc, ps_cur_slice, ps_pps,
                                          u1_nal_ref_idc,
                                          u1_bottom_field_flag,
                                          u1_field_pic_flag, &i4_poc);
        if(ret != OK)
            return ret;
        /* Display seq no calculations */
        if(i4_poc >= ps_dec->i4_max_poc)
            ps_dec->i4_max_poc = i4_poc;
        /* IDR Picture or POC wrap around */
        if(i4_poc == 0)
        {
            UWORD64 u8_temp;
            u8_temp = (UWORD64)ps_dec->i4_prev_max_display_seq
                      + ps_dec->i4_max_poc
                      + ps_dec->u1_max_dec_frame_buffering + 1;
            /*If i4_prev_max_display_seq overflows integer range, reset it */
            ps_dec->i4_prev_max_display_seq = (u8_temp > 0x7fffffff)?
                                              0 : u8_temp;
            ps_dec->i4_max_poc = 0;
        }
    }

    /*--------------------------------------------------------------------*/
    /* Copy the values read from the bitstream to the slice header and then*/
    /* If the slice is first slice in picture, then do Start of Picture   */
    /* processing.                                                        */
    /*--------------------------------------------------------------------*/
    ps_cur_slice->i4_delta_pic_order_cnt[0] = i_delta_poc[0];
    ps_cur_slice->i4_delta_pic_order_cnt[1] = i_delta_poc[1];
    ps_cur_slice->u4_idr_pic_id = u4_idr_pic_id;
    ps_cur_slice->u2_first_mb_in_slice = u2_first_mb_in_slice;
    ps_cur_slice->u1_field_pic_flag = u1_field_pic_flag;
    ps_cur_slice->u1_bottom_field_flag = u1_bottom_field_flag;
    ps_cur_slice->u1_slice_type = u1_slice_type;
    ps_cur_slice->i4_pic_order_cnt_lsb = s_tmp_poc.i4_pic_order_cnt_lsb;

    ps_cur_slice->u1_nal_unit_type = u1_nal_unit_type;
    ps_cur_slice->u1_redundant_pic_cnt = u1_redundant_pic_cnt;
    ps_cur_slice->u1_nal_ref_idc = u1_nal_ref_idc;
    ps_cur_slice->u1_pic_order_cnt_type = u1_pic_order_cnt_type;

    if(ps_seq->u1_frame_mbs_only_flag)
        ps_cur_slice->u1_direct_8x8_inference_flag =
                        ps_seq->u1_direct_8x8_inference_flag;
    else
        ps_cur_slice->u1_direct_8x8_inference_flag = 1;

    if(u1_slice_type == B_SLICE)
    {
        ps_cur_slice->u1_direct_spatial_mv_pred_flag = ih264d_get_bit_h264(
                        ps_bitstrm);
        COPYTHECONTEXT("SH: direct_spatial_mv_pred_flag",
                        ps_cur_slice->u1_direct_spatial_mv_pred_flag);

        if(ps_cur_slice->u1_direct_spatial_mv_pred_flag)
            ps_cur_slice->pf_decodeDirect = ih264d_decode_spatial_direct;
        else
            ps_cur_slice->pf_decodeDirect = ih264d_decode_temporal_direct;
        if(!((ps_pps->ps_sps->u1_mb_aff_flag) && (!u1_field_pic_flag)))
            ps_dec->pf_mvpred = ih264d_mvpred_nonmbaffB;
    }
    else
    {
        if(!((ps_pps->ps_sps->u1_mb_aff_flag) && (!u1_field_pic_flag)))
            ps_dec->pf_mvpred = ih264d_mvpred_nonmbaff;
    }

    if(ps_dec->u4_first_slice_in_pic)
    {
        if(u2_first_mb_in_slice == 0)
        {
            ret = ih264d_start_of_pic(ps_dec, i4_poc, &s_tmp_poc, u2_frame_num, ps_pps);
            if(ret != OK)
                return ret;
        }

        ps_dec->u4_output_present = 0;

        {
            ih264d_get_next_display_field(ps_dec,
                                          ps_dec->ps_out_buffer,
                                          &(ps_dec->s_disp_op));
            /* If error code is non-zero then there is no buffer available for display,
             hence avoid format conversion */

            if(0 != ps_dec->s_disp_op.u4_error_code)
            {
                ps_dec->u4_fmt_conv_cur_row = ps_dec->s_disp_frame_info.u4_y_ht;
            }
            else
                ps_dec->u4_output_present = 1;
        }
        if(ps_dec->u1_separate_parse == 1)
        {
            if(ps_dec->u4_dec_thread_created == 0)
            {
                ithread_create(ps_dec->pv_dec_thread_handle, NULL,
                               (void *)ih264d_decode_picture_thread,
                               (void *)ps_dec);

                ps_dec->u4_dec_thread_created = 1;
            }

            if((ps_dec->u4_num_cores == 3) &&
                            ((ps_dec->u4_app_disable_deblk_frm == 0) || ps_dec->i1_recon_in_thread3_flag)
                            && (ps_dec->u4_bs_deblk_thread_created == 0))
            {
                ps_dec->u4_start_recon_deblk = 0;
                ithread_create(ps_dec->pv_bs_deblk_thread_handle, NULL,
                               (void *)ih264d_recon_deblk_thread,
                               (void *)ps_dec);
                ps_dec->u4_bs_deblk_thread_created = 1;
            }
        }

    }

    /* INITIALIZATION of fn ptrs for MC and formMbPartInfo functions */
    {
        UWORD8 uc_nofield_nombaff;



        uc_nofield_nombaff = ((ps_dec->ps_cur_slice->u1_field_pic_flag == 0)
                        && (ps_dec->ps_cur_slice->u1_mbaff_frame_flag == 0)
                        && (u1_slice_type != B_SLICE)
                        && (ps_dec->ps_cur_pps->u1_wted_pred_flag == 0));

        /* Initialise MC and formMbPartInfo fn ptrs one time based on profile_idc */

        if(uc_nofield_nombaff)
        {
            ps_dec->p_form_mb_part_info = ih264d_form_mb_part_info_bp;
            ps_dec->p_motion_compensate = ih264d_motion_compensate_bp;
        }
        else
        {
            ps_dec->p_form_mb_part_info = ih264d_form_mb_part_info_mp;
            ps_dec->p_motion_compensate = ih264d_motion_compensate_mp;
        }


    }

    /*
     * Decide whether to decode the current picture or not
     */
    {
        dec_err_status_t * ps_err = ps_dec->ps_dec_err_status;
        if(ps_err->u4_frm_sei_sync == u2_frame_num)
        {
            ps_err->u1_err_flag = ACCEPT_ALL_PICS;
            ps_err->u4_frm_sei_sync = SYNC_FRM_DEFAULT;
        }
        ps_err->u4_cur_frm = u2_frame_num;
    }

    /* Decision for decoding if the picture is to be skipped */
    {
        WORD32 i4_skip_b_pic, i4_skip_p_pic;

        i4_skip_b_pic = (ps_dec->u4_skip_frm_mask & B_SLC_BIT)
                        && (B_SLICE == u1_slice_type) && (0 == u1_nal_ref_idc);

        i4_skip_p_pic = (ps_dec->u4_skip_frm_mask & P_SLC_BIT)
                        && (P_SLICE == u1_slice_type) && (0 == u1_nal_ref_idc);

        /**************************************************************/
        /* Skip the B picture if skip mask is set for B picture and   */
        /* Current B picture is a non reference B picture or there is */
        /* no user for reference B picture                            */
        /**************************************************************/
        if(i4_skip_b_pic)
        {
            ps_dec->ps_cur_pic->u4_pack_slc_typ |= B_SLC_BIT;
            /* Don't decode the picture in SKIP-B mode if that picture is B */
            /* and also it is not to be used as a reference picture         */
            ps_dec->u1_last_pic_not_decoded = 1;

            return OK;
        }
        /**************************************************************/
        /* Skip the P picture if skip mask is set for P picture and   */
        /* Current P picture is a non reference P picture or there is */
        /* no user for reference P picture                            */
        /**************************************************************/
        if(i4_skip_p_pic)
        {
            ps_dec->ps_cur_pic->u4_pack_slc_typ |= P_SLC_BIT;
            /* Don't decode the picture in SKIP-P mode if that picture is P */
            /* and also it is not to be used as a reference picture         */
            ps_dec->u1_last_pic_not_decoded = 1;

            return OK;
        }
    }

    {
        UWORD16 u2_mb_x, u2_mb_y;

        ps_dec->i4_submb_ofst = ((u2_first_mb_in_slice
                        << ps_cur_slice->u1_mbaff_frame_flag) * SUB_BLK_SIZE)
                        - SUB_BLK_SIZE;
        if(u2_first_mb_in_slice)
        {
            UWORD8 u1_mb_aff;
            UWORD8 u1_field_pic;
            UWORD16 u2_frm_wd_in_mbs;
            u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs;
            u1_mb_aff = ps_cur_slice->u1_mbaff_frame_flag;
            u1_field_pic = ps_cur_slice->u1_field_pic_flag;

            {
                UWORD32 x_offset;
                UWORD32 y_offset;
                UWORD32 u4_frame_stride;
                tfr_ctxt_t *ps_trns_addr; // = &ps_dec->s_tran_addrecon_parse;

                if(ps_dec->u1_separate_parse)
                {
                    ps_trns_addr = &ps_dec->s_tran_addrecon_parse;
                }
                else
                {
                    ps_trns_addr = &ps_dec->s_tran_addrecon;
                }
                u2_mb_x = MOD(u2_first_mb_in_slice, u2_frm_wd_in_mbs);
                u2_mb_y = DIV(u2_first_mb_in_slice, u2_frm_wd_in_mbs);

                u2_mb_y <<= u1_mb_aff;

                if((u2_mb_x > u2_frm_wd_in_mbs - 1)
                                || (u2_mb_y > ps_dec->u2_frm_ht_in_mbs - 1))
                {
                    return ERROR_CORRUPTED_SLICE;
                }

                u4_frame_stride = ps_dec->u2_frm_wd_y << u1_field_pic;
                x_offset = u2_mb_x << 4;
                y_offset = (u2_mb_y * u4_frame_stride) << 4;

                ps_trns_addr->pu1_dest_y = ps_dec->s_cur_pic.pu1_buf1 + x_offset
                                + y_offset;

                u4_frame_stride = ps_dec->u2_frm_wd_uv << u1_field_pic;
                x_offset >>= 1;
                y_offset = (u2_mb_y * u4_frame_stride) << 3;

                x_offset *= YUV420SP_FACTOR;

                ps_trns_addr->pu1_dest_u = ps_dec->s_cur_pic.pu1_buf2 + x_offset
                                + y_offset;
                ps_trns_addr->pu1_dest_v = ps_dec->s_cur_pic.pu1_buf3 + x_offset
                                + y_offset;

                ps_trns_addr->pu1_mb_y = ps_trns_addr->pu1_dest_y;
                ps_trns_addr->pu1_mb_u = ps_trns_addr->pu1_dest_u;
                ps_trns_addr->pu1_mb_v = ps_trns_addr->pu1_dest_v;


                // assign the deblock structure pointers to start of slice
                if(ps_dec->u1_separate_parse == 1)
                {
                    ps_dec->ps_deblk_mbn = ps_dec->ps_deblk_pic
                                    + (u2_first_mb_in_slice << u1_mb_aff);
                }
                else
                {
                        ps_dec->ps_deblk_mbn = ps_dec->ps_deblk_pic
                                        + (u2_first_mb_in_slice << u1_mb_aff);
                }

                ps_dec->u2_cur_mb_addr = (u2_first_mb_in_slice << u1_mb_aff);

                ps_dec->ps_mv_cur = ps_dec->s_cur_pic.ps_mv
                                + ((u2_first_mb_in_slice << u1_mb_aff) << 4);
            }
        }
        else
        {
            tfr_ctxt_t *ps_trns_addr;

            if(ps_dec->u1_separate_parse)
            {
                ps_trns_addr = &ps_dec->s_tran_addrecon_parse;
            }
            else
            {
                ps_trns_addr = &ps_dec->s_tran_addrecon;
            }

            u2_mb_x = 0xffff;
            u2_mb_y = 0;
            // assign the deblock structure pointers to start of slice
            ps_dec->u2_cur_mb_addr = 0;
            ps_dec->ps_deblk_mbn = ps_dec->ps_deblk_pic;
            ps_dec->ps_mv_cur = ps_dec->s_cur_pic.ps_mv;
            ps_trns_addr->pu1_dest_y = ps_dec->s_cur_pic.pu1_buf1;
            ps_trns_addr->pu1_dest_u = ps_dec->s_cur_pic.pu1_buf2;
            ps_trns_addr->pu1_dest_v = ps_dec->s_cur_pic.pu1_buf3;

            ps_trns_addr->pu1_mb_y = ps_trns_addr->pu1_dest_y;
            ps_trns_addr->pu1_mb_u = ps_trns_addr->pu1_dest_u;
            ps_trns_addr->pu1_mb_v = ps_trns_addr->pu1_dest_v;

        }

        ps_dec->ps_part = ps_dec->ps_parse_part_params;

        ps_dec->u2_mbx =
                        (MOD(u2_first_mb_in_slice - 1, ps_seq->u2_frm_wd_in_mbs));
        ps_dec->u2_mby =
                        (DIV(u2_first_mb_in_slice - 1, ps_seq->u2_frm_wd_in_mbs));
        ps_dec->u2_mby <<= ps_cur_slice->u1_mbaff_frame_flag;
        ps_dec->i2_prev_slice_mbx = ps_dec->u2_mbx;
        ps_dec->i2_prev_slice_mby = ps_dec->u2_mby;
    }

    /* RBSP stop bit is used for CABAC decoding*/
    ps_bitstrm->u4_max_ofst += ps_dec->ps_cur_pps->u1_entropy_coding_mode;

    ps_dec->u1_B = (u1_slice_type == B_SLICE);
    ps_dec->u4_next_mb_skip = 0;

    ps_dec->ps_parse_cur_slice->u4_first_mb_in_slice =
                    ps_dec->ps_cur_slice->u2_first_mb_in_slice;
    ps_dec->ps_parse_cur_slice->slice_type =
                    ps_dec->ps_cur_slice->u1_slice_type;


    ps_dec->u4_start_recon_deblk = 1;
    {
        WORD32 num_entries;
        WORD32 size;
        UWORD8 *pu1_buf;

        num_entries = MAX_FRAMES;
        if((1 >= ps_dec->ps_cur_sps->u1_num_ref_frames) &&
            (0 == ps_dec->i4_display_delay))
        {
            num_entries = 1;
        }
        num_entries = ((2 * num_entries) + 1);
        num_entries *= 2;


        size = num_entries * sizeof(void *);
        size += PAD_MAP_IDX_POC * sizeof(void *);

        pu1_buf = (UWORD8 *)ps_dec->pv_map_ref_idx_to_poc_buf;
        pu1_buf += size * ps_dec->u2_cur_slice_num;
        ps_dec->ps_parse_cur_slice->ppv_map_ref_idx_to_poc = ( void *)pu1_buf;
    }

    if(ps_dec->u1_separate_parse)
    {
        ps_dec->ps_parse_cur_slice->pv_tu_coeff_data_start = ps_dec->pv_parse_tu_coeff_data;
    }
    else
    {
        ps_dec->pv_proc_tu_coeff_data = ps_dec->pv_parse_tu_coeff_data;
    }

    ret = ih264d_fix_error_in_dpb(ps_dec);
    if(ret < 0)
        return ERROR_DBP_MANAGER_T;

    if(u1_slice_type == I_SLICE)
    {
        ps_dec->ps_cur_pic->u4_pack_slc_typ |= I_SLC_BIT;

        ret = ih264d_parse_islice(ps_dec, u2_first_mb_in_slice);
        ps_dec->u1_pr_sl_type = u1_slice_type;
        if(ps_dec->i4_pic_type != B_SLICE && ps_dec->i4_pic_type != P_SLICE)
            ps_dec->i4_pic_type = I_SLICE;

    }
    else if(u1_slice_type == P_SLICE)
    {
        ps_dec->ps_cur_pic->u4_pack_slc_typ |= P_SLC_BIT;
        ret = ih264d_parse_pslice(ps_dec, u2_first_mb_in_slice);
        ps_dec->u1_pr_sl_type = u1_slice_type;
        if(ps_dec->i4_pic_type != B_SLICE)
            ps_dec->i4_pic_type = P_SLICE;
    }
    else if(u1_slice_type == B_SLICE)
    {
        ps_dec->ps_cur_pic->u4_pack_slc_typ |= B_SLC_BIT;
        ret = ih264d_parse_bslice(ps_dec, u2_first_mb_in_slice);
        ps_dec->u1_pr_sl_type = u1_slice_type;
        ps_dec->i4_pic_type = B_SLICE;
    }
    else
        return ERROR_INV_SLC_TYPE_T;

    if(ps_dec->u1_slice_header_done)
    {
        /* set to zero to indicate a valid slice has been decoded */
        ps_dec->u1_first_slice_in_stream = 0;
    }

    if(ret != OK)
        return ret;

    if(u1_nal_ref_idc != 0)
    {
        if(!ps_dec->ps_dpb_cmds->u1_dpb_commands_read)
        {
            memcpy((void *)ps_dec->ps_dpb_cmds, (void *)(&(ps_dec->s_dpb_cmds_scratch)),
                   sizeof(dpb_commands_t));
        }
    }

    /* storing last Mb X and MbY of the slice */
    ps_dec->i2_prev_slice_mbx = ps_dec->u2_mbx;
    ps_dec->i2_prev_slice_mby = ps_dec->u2_mby;

    /* End of Picture detection */

    if(ps_dec->u2_total_mbs_coded >= (ps_seq->u2_max_mb_addr + 1))
    {
        ps_dec->u1_pic_decode_done = 1;

    }

    {
        dec_err_status_t * ps_err = ps_dec->ps_dec_err_status;
        if((ps_err->u1_err_flag & REJECT_PB_PICS)
                        && (ps_err->u1_cur_pic_type == PIC_TYPE_I))
        {
            ps_err->u1_err_flag = ACCEPT_ALL_PICS;
        }
    }

    PRINT_BIN_BIT_RATIO(ps_dec)

    return ret;
}