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))
        {
            ih264d_form_scaling_matrix_picture(ps_seq, ps_pps, ps_dec);
            ps_dec->s_high_profile.u1_scaling_present = 1;
        }
        else
        {
            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
    {
        ih264d_form_default_scaling_matrix(ps_dec);
    }

    /* 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;

            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;
    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;
    }

    {
        UWORD32 skip;

        if((ps_dec->i4_app_skip_mode == IVD_SKIP_PB)
                        || (ps_dec->i4_dec_skip_mode == IVD_SKIP_PB))
        {
            UWORD32 u4_bit_stream_offset = 0;

            if(ps_dec->u1_nal_unit_type == IDR_SLICE_NAL)
            {
                skip = 0;

                ps_dec->i4_dec_skip_mode = IVD_SKIP_NONE;
            }
            else if((I_SLICE == u1_slice_type)
                            && (1 >= ps_dec->ps_cur_sps->u1_num_ref_frames))
            {
                skip = 0;

                ps_dec->i4_dec_skip_mode = IVD_SKIP_NONE;
            }
            else
            {
                skip = 1;
            }

            /* If one frame worth of data is already skipped, do not skip the next one */
            if((0 == u2_first_mb_in_slice) && (1 == ps_dec->u4_prev_nal_skipped))
            {
                skip = 0;
            }

            if(skip)
            {
                ps_dec->u4_prev_nal_skipped = 1;
                ps_dec->i4_dec_skip_mode = IVD_SKIP_PB;
                return 0;
            }
            else
            {
                /* If the previous NAL was skipped, then
                 do not process that buffer in this call.
                 Return to app and process it in the next call.
                 This is necessary to handle cases where I/IDR is not complete in
                 the current buffer and application intends to fill the remaining part of the bitstream
                 later. This ensures we process only frame worth of data in every call */
                if(1 == ps_dec->u4_prev_nal_skipped)
                {
                    ps_dec->u4_return_to_app = 1;
                    return 0;
                }
            }
        }

    }

    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)
        {
            ps_dec->i4_prev_max_display_seq = ps_dec->i4_prev_max_display_seq
                            + ps_dec->i4_max_poc
                            + ps_dec->u1_max_dec_frame_buffering + 1;
            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;
}