/******************************************************************************

*

* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore

*

* 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.

*

******************************************************************************/

/**

*******************************************************************************

* @file

*  ihevcd_parse_headers.c

*

* @brief

*  Contains functions for parsing headers

*

* @author

*  Harish

*

* @par List of Functions:

*

* @remarks

*  None

*

*******************************************************************************

*/

/*****************************************************************************/

/* File Includes                                                             */

/*****************************************************************************/

#include <stdio.h>

#include <stddef.h>

#include <stdlib.h>

#include <string.h>

#include <assert.h>

#include "ihevc_typedefs.h"

#include "iv.h"

#include "ivd.h"

#include "ihevcd_cxa.h"

#include "ihevc_defs.h"

#include "ihevc_debug.h"

#include "ihevc_defs.h"

#include "ihevc_structs.h"

#include "ihevc_buf_mgr.h"

#include "ihevc_dpb_mgr.h"

#include "ihevc_macros.h"

#include "ihevc_platform_macros.h"

#include "ihevc_cabac_tables.h"

#include "ihevc_common_tables.h"

#include "ihevc_quant_tables.h"

#include "ihevcd_trace.h"

#include "ihevcd_defs.h"

#include "ihevcd_function_selector.h"

#include "ihevcd_structs.h"

#include "ihevcd_error.h"

#include "ihevcd_debug.h"

#include "ihevcd_nal.h"

#include "ihevcd_bitstream.h"

#include "ihevcd_parse_headers.h"

#include "ihevcd_parse_slice_header.h"

#include "ihevcd_ref_list.h"

mv_buf_t* ihevcd_mv_mgr_get_poc(buf_mgr_t *ps_mv_buf_mgr, UWORD32 abs_poc);

/**

*******************************************************************************

*

* @brief

*  Parses VPS operation point

*

* @par   Description

* Parses VPS operation point as per section 7.3.5

*

* @param[out] ps_vps

*  Pointer to VPS structure

*

* @param[in] ps_bitstrm

*  Pointer to bitstream structure

*

* @param[in] ops_idx

*  Operating point index

*

* @returns Error code from IHEVCD_ERROR_T

*

* @remarks

*

*******************************************************************************

*/

IHEVCD_ERROR_T ihevcd_operation_point_set(vps_t *ps_vps, bitstrm_t *ps_bitstrm, WORD32 ops_idx)

{

    WORD32 i;

    WORD32 value;

    IHEVCD_ERROR_T ret = (IHEVCD_ERROR_T)IHEVCD_SUCCESS;

    UNUSED(ops_idx);

    for(i = 0; i <= ps_vps->i1_vps_max_nuh_reserved_zero_layer_id; i++)

    {

        BITS_PARSE("list_entry_l0[ i ]", value, ps_bitstrm, 1);

        //ps_vps->ai1_layer_id_included_flag[ops_idx][i] = value;

    }

    UNUSED(value);

    return ret;

}

/**

*******************************************************************************

*

* @brief

*  Parses pic_lismod_t (picture list mod syntax)  Section:7.3.8.3 Reference

* picture list mod syntax

*

* @par Description:

*  Parse pict list mod synt and update pic_lismod_t struct

*

* @param[in] ps_codec

*  Pointer to codec context

*

* @returns  Error code from IHEVCD_ERROR_T

*

* @remarks

*

*

*******************************************************************************

*/

WORD32 ihevcd_ref_pic_list_modification(bitstrm_t *ps_bitstrm,

                                        slice_header_t *ps_slice_hdr,

                                        WORD32 num_poc_total_curr)

{

    WORD32 ret = IHEVCD_SUCCESS;

    WORD32 value;

    WORD32 i;

    rplm_t *ps_rplm;

    WORD32 num_bits_list_entry;

    ps_rplm = &(ps_slice_hdr->s_rplm);

    /* Calculate Ceil(Log2(num_poc_total_curr)) */

    {

        num_bits_list_entry = 32 - CLZ(num_poc_total_curr);

        /* Check if num_poc_total_curr is power of 2 */

        if(0 == (num_poc_total_curr & (num_poc_total_curr - 1)))

        {

            num_bits_list_entry--;

        }

    }

    if(ps_slice_hdr->i1_slice_type  == PSLICE || ps_slice_hdr->i1_slice_type  == BSLICE)

    {

        BITS_PARSE("ref_pic_list_modification_flag_l0", value, ps_bitstrm, 1);

        ps_rplm->i1_ref_pic_list_modification_flag_l0 = value;

        if(ps_rplm->i1_ref_pic_list_modification_flag_l0)

            for(i = 0; i < ps_slice_hdr->i1_num_ref_idx_l0_active; i++)

            {

                BITS_PARSE("list_entry_l0", value, ps_bitstrm, num_bits_list_entry);

                ps_rplm->i1_list_entry_l0[i] = value;

                ps_rplm->i1_list_entry_l0[i] = CLIP3(ps_rplm->i1_list_entry_l0[i], 0, num_poc_total_curr - 1);

            }

    }

    if(ps_slice_hdr->i1_slice_type  == BSLICE)

    {

        BITS_PARSE("ref_pic_list_modification_flag_l1", value, ps_bitstrm, 1);

        ps_rplm->i1_ref_pic_list_modification_flag_l1 = value;

        if(ps_rplm->i1_ref_pic_list_modification_flag_l1)

            for(i = 0; i < ps_slice_hdr->i1_num_ref_idx_l1_active; i++)

            {

                BITS_PARSE("list_entry_l1", value, ps_bitstrm, num_bits_list_entry);

                ps_rplm->i1_list_entry_l1[i] = value;

                ps_rplm->i1_list_entry_l1[i] = CLIP3(ps_rplm->i1_list_entry_l1[i], 0, num_poc_total_curr - 1);

            }

    }

    return ret;

}

/**

*******************************************************************************

*

* @brief

*  Parse Slice Header

* slice_header_syntax()

*

* @par Description:

*  Parse Slice Header as per  Section: 7.3.8

*

* @param[in] ps_codec

*  Pointer to codec context

*

* @returns  Error code from IHEVCD_ERROR_T

*

* @remarks

*

*

*******************************************************************************

*/

IHEVCD_ERROR_T ihevcd_parse_slice_header(codec_t *ps_codec,

                                         nal_header_t *ps_nal)

{

    IHEVCD_ERROR_T ret = (IHEVCD_ERROR_T)IHEVCD_SUCCESS;

    UWORD32 value;

    WORD32 i4_value;

    WORD32 i, j;

    WORD32 sps_id;

    pps_t *ps_pps;

    sps_t *ps_sps;

    slice_header_t *ps_slice_hdr;

    WORD32 disable_deblocking_filter_flag;

    bitstrm_t *ps_bitstrm = &ps_codec->s_parse.s_bitstrm;

    WORD32 idr_pic_flag;

    WORD32 pps_id;

    WORD32 first_slice_in_pic_flag;

    WORD32 no_output_of_prior_pics_flag = 0;

    WORD8 i1_nal_unit_type = ps_nal->i1_nal_unit_type;

    WORD32 num_poc_total_curr = 0;

    UWORD32 slice_address;

    WORD32 prev_slice_incomplete_flag = 0;

    if(ps_codec->i4_slice_error == 1)

        return ret;

    idr_pic_flag = (NAL_IDR_W_LP == i1_nal_unit_type) ||

                    (NAL_IDR_N_LP == i1_nal_unit_type);

    BITS_PARSE("first_slice_in_pic_flag", first_slice_in_pic_flag, ps_bitstrm, 1);

    if((NAL_BLA_W_LP <= i1_nal_unit_type) &&

       (NAL_RSV_RAP_VCL23          >= i1_nal_unit_type))

    {

        BITS_PARSE("no_output_of_prior_pics_flag", no_output_of_prior_pics_flag, ps_bitstrm, 1);

    }

    UEV_PARSE("pic_parameter_set_id", pps_id, ps_bitstrm);

    if(pps_id < 0 || pps_id > MAX_PPS_CNT - 2)

    {

        return IHEVCD_INVALID_PARAMETER;

    }

    /* Get the current PPS structure */

    ps_pps = ps_codec->s_parse.ps_pps_base + pps_id;

    if(0 == ps_pps->i1_pps_valid)

    {

        pps_t *ps_pps_ref = ps_codec->ps_pps_base;

        while(0 == ps_pps_ref->i1_pps_valid)

        {

            ps_pps_ref++;

            if((ps_pps_ref - ps_codec->ps_pps_base >= MAX_PPS_CNT - 1))

                return IHEVCD_INVALID_HEADER;

        }

        ihevcd_copy_pps(ps_codec, pps_id, ps_pps_ref->i1_pps_id);

    }

    /* Get SPS id for the current PPS */

    sps_id = ps_pps->i1_sps_id;

    /* Get the current SPS structure */

    ps_sps = ps_codec->s_parse.ps_sps_base + sps_id;

    /* When the current slice is the first in a pic,

     *  check whether the previous frame is complete

     *  If the previous frame is incomplete -

     *  treat the remaining CTBs as skip */

    if((0 != ps_codec->u4_pic_cnt || ps_codec->i4_pic_present) &&

                    first_slice_in_pic_flag)

    {

        if(ps_codec->i4_pic_present)

        {

            slice_header_t *ps_slice_hdr_next;

            ps_codec->i4_slice_error = 1;

            ps_codec->s_parse.i4_cur_slice_idx--;

            if(ps_codec->s_parse.i4_cur_slice_idx < 0)

                ps_codec->s_parse.i4_cur_slice_idx = 0;

            ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + ((ps_codec->s_parse.i4_cur_slice_idx + 1) & (MAX_SLICE_HDR_CNT - 1));

            ps_slice_hdr_next->i2_ctb_x = 0;

            ps_slice_hdr_next->i2_ctb_y = ps_codec->s_parse.ps_sps->i2_pic_ht_in_ctb;

            return ret;

        }

        else

        {

            ps_codec->i4_slice_error = 0;

        }

    }

    if(first_slice_in_pic_flag)

    {

        ps_codec->s_parse.i4_cur_slice_idx = 0;

    }

    else

    {

        /* If the current slice is not the first slice in the pic,

         * but the first one to be parsed, set the current slice indx to 1

         * Treat the first slice to be missing and copy the current slice header

         * to the first one */

        if(0 == ps_codec->i4_pic_present)

            ps_codec->s_parse.i4_cur_slice_idx = 1;

    }

    ps_slice_hdr = ps_codec->s_parse.ps_slice_hdr_base + (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1));

    memset(ps_slice_hdr, 0, sizeof(*ps_slice_hdr));

    if((ps_pps->i1_dependent_slice_enabled_flag) &&

       (!first_slice_in_pic_flag))

    {

        BITS_PARSE("dependent_slice_flag", value, ps_bitstrm, 1);

        /* First slice to be decoded in the current picture can't be dependent slice */

        if (value && 0 == ps_codec->i4_pic_present)

        {

             return IHEVCD_IGNORE_SLICE;

        }

        /* If dependendent slice, copy slice header from previous slice */

        if(value && (ps_codec->s_parse.i4_cur_slice_idx > 0))

        {

            ihevcd_copy_slice_hdr(ps_codec,

                                  (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1)),

                                  ((ps_codec->s_parse.i4_cur_slice_idx - 1) & (MAX_SLICE_HDR_CNT - 1)));

        }

        ps_slice_hdr->i1_dependent_slice_flag = value;

    }

    else

    {

        ps_slice_hdr->i1_dependent_slice_flag = 0;

    }

    ps_slice_hdr->i1_nal_unit_type = i1_nal_unit_type;

    ps_slice_hdr->i1_pps_id = pps_id;

    ps_slice_hdr->i1_first_slice_in_pic_flag = first_slice_in_pic_flag;

    ps_slice_hdr->i1_no_output_of_prior_pics_flag = 1;

    if((NAL_BLA_W_LP <= i1_nal_unit_type) &&

                    (NAL_RSV_RAP_VCL23          >= i1_nal_unit_type))

    {

        ps_slice_hdr->i1_no_output_of_prior_pics_flag = no_output_of_prior_pics_flag;

    }

    ps_slice_hdr->i1_pps_id = pps_id;

    if(!ps_slice_hdr->i1_first_slice_in_pic_flag)

    {

        WORD32 num_bits;

        /* Use CLZ to compute Ceil( Log2( PicSizeInCtbsY ) ) */

        num_bits = 32 - CLZ(ps_sps->i4_pic_size_in_ctb - 1);

        BITS_PARSE("slice_address", value, ps_bitstrm, num_bits);

        slice_address = value;

        /* If slice address is greater than the number of CTBs in a picture,

         * ignore the slice */

        if(value >= ps_sps->i4_pic_size_in_ctb || value == 0)

            return IHEVCD_IGNORE_SLICE;

    }

    else

    {

        slice_address = 0;

    }

    if(!ps_slice_hdr->i1_dependent_slice_flag)

    {

        ps_slice_hdr->i1_pic_output_flag = 1;

        ps_slice_hdr->i4_pic_order_cnt_lsb = 0;

        ps_slice_hdr->i1_num_long_term_sps = 0;

        ps_slice_hdr->i1_num_long_term_pics = 0;

        for(i = 0; i < ps_pps->i1_num_extra_slice_header_bits; i++)

        {

            BITS_PARSE("slice_reserved_undetermined_flag[ i ]", value, ps_bitstrm, 1);

            //slice_reserved_undetermined_flag[ i ]

        }

        UEV_PARSE("slice_type", value, ps_bitstrm);

        if(value > 2)

        {

            return IHEVCD_INVALID_PARAMETER;

        }

        ps_slice_hdr->i1_slice_type = value;

        /* If the picture is IRAP, slice type must be equal to ISLICE */

        if((ps_slice_hdr->i1_nal_unit_type >= NAL_BLA_W_LP) &&

                        (ps_slice_hdr->i1_nal_unit_type <= NAL_RSV_RAP_VCL23))

            ps_slice_hdr->i1_slice_type = ISLICE;

        if((ps_slice_hdr->i1_slice_type < 0) ||

                        (ps_slice_hdr->i1_slice_type > 2))

            return IHEVCD_IGNORE_SLICE;

        if(ps_pps->i1_output_flag_present_flag)

        {

            BITS_PARSE("pic_output_flag", value, ps_bitstrm, 1);

            ps_slice_hdr->i1_pic_output_flag = value;

        }

        ps_slice_hdr->i1_colour_plane_id = 0;

        if(1 == ps_sps->i1_separate_colour_plane_flag)

        {

            BITS_PARSE("colour_plane_id", value, ps_bitstrm, 2);

            ps_slice_hdr->i1_colour_plane_id = value;

        }

        ps_slice_hdr->i1_slice_temporal_mvp_enable_flag = 0;

        if(!idr_pic_flag)

        {

            WORD32 st_rps_idx;

            WORD32 num_neg_pics;

            WORD32 num_pos_pics;

            WORD8 *pi1_used;

            BITS_PARSE("pic_order_cnt_lsb", value, ps_bitstrm, ps_sps->i1_log2_max_pic_order_cnt_lsb);

            //value = ihevcd_extend_sign_bit(value, ps_sps->i1_log2_max_pic_order_cnt_lsb);

            ps_slice_hdr->i4_pic_order_cnt_lsb = value;

            BITS_PARSE("short_term_ref_pic_set_sps_flag", value, ps_bitstrm, 1);

            ps_slice_hdr->i1_short_term_ref_pic_set_sps_flag = value;

            if(1 == ps_slice_hdr->i1_short_term_ref_pic_set_sps_flag)

            {

                WORD32 numbits;

                ps_slice_hdr->i1_short_term_ref_pic_set_idx = 0;

                if(ps_sps->i1_num_short_term_ref_pic_sets > 1)

                {

                    numbits = 32 - CLZ(ps_sps->i1_num_short_term_ref_pic_sets - 1);

                    BITS_PARSE("short_term_ref_pic_set_idx", value, ps_bitstrm, numbits);

                    if (value >= ps_sps->i1_num_short_term_ref_pic_sets) {

                        return IHEVCD_INVALID_PARAMETER;

                    }

                    ps_slice_hdr->i1_short_term_ref_pic_set_idx = value;

                }

                st_rps_idx = ps_slice_hdr->i1_short_term_ref_pic_set_idx;

                num_neg_pics = ps_sps->as_stref_picset[st_rps_idx].i1_num_neg_pics;

                num_pos_pics = ps_sps->as_stref_picset[st_rps_idx].i1_num_pos_pics;

                pi1_used = ps_sps->as_stref_picset[st_rps_idx].ai1_used;

            }

            else

            {

                ret = ihevcd_short_term_ref_pic_set(ps_bitstrm,

                                                    &ps_sps->as_stref_picset[0],

                                                    ps_sps->i1_num_short_term_ref_pic_sets,

                                                    ps_sps->i1_num_short_term_ref_pic_sets,

                                                    &ps_slice_hdr->s_stref_picset);

                if (ret != IHEVCD_SUCCESS)

                {

                    return ret;

                }

                st_rps_idx = ps_sps->i1_num_short_term_ref_pic_sets;

                num_neg_pics = ps_slice_hdr->s_stref_picset.i1_num_neg_pics;

                num_pos_pics = ps_slice_hdr->s_stref_picset.i1_num_pos_pics;

                pi1_used = ps_slice_hdr->s_stref_picset.ai1_used;

            }

            if(ps_sps->i1_long_term_ref_pics_present_flag)

            {

                if(ps_sps->i1_num_long_term_ref_pics_sps > 0)

                {

                    UEV_PARSE("num_long_term_sps", value, ps_bitstrm);

                    if(value > ps_sps->i1_num_long_term_ref_pics_sps)

                    {

                        return IHEVCD_INVALID_PARAMETER;

                    }

                    ps_slice_hdr->i1_num_long_term_sps = value;

                }

                UEV_PARSE("num_long_term_pics", value, ps_bitstrm);

                if(((ULWORD64)value + ps_slice_hdr->i1_num_long_term_sps + num_neg_pics +

                    num_pos_pics) > (MAX_DPB_SIZE - 1))

                {

                    return IHEVCD_INVALID_PARAMETER;

                }

                ps_slice_hdr->i1_num_long_term_pics = value;

                for(i = 0; i < (ps_slice_hdr->i1_num_long_term_sps +

                                ps_slice_hdr->i1_num_long_term_pics); i++)

                {

                    if(i < ps_slice_hdr->i1_num_long_term_sps)

                    {

                        /* Use CLZ to compute Ceil( Log2( num_long_term_ref_pics_sps ) ) */

                        if (ps_sps->i1_num_long_term_ref_pics_sps > 1)

                        {

                            WORD32 num_bits = 32 - CLZ(ps_sps->i1_num_long_term_ref_pics_sps - 1);

                            BITS_PARSE("lt_idx_sps[ i ]", value, ps_bitstrm, num_bits);

                            if(value >= ps_sps->i1_num_long_term_ref_pics_sps)

                            {

                                return IHEVCD_INVALID_PARAMETER;

                            }

                        }

                        else

                        {

                            value = 0;

                        }

                        ps_slice_hdr->ai4_poc_lsb_lt[i] = ps_sps->au2_lt_ref_pic_poc_lsb_sps[value];

                        ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i] = ps_sps->ai1_used_by_curr_pic_lt_sps_flag[value];

                    }

                    else

                    {

                        BITS_PARSE("poc_lsb_lt[ i ]", value, ps_bitstrm, ps_sps->i1_log2_max_pic_order_cnt_lsb);

                        ps_slice_hdr->ai4_poc_lsb_lt[i] = value;

                        BITS_PARSE("used_by_curr_pic_lt_flag[ i ]", value, ps_bitstrm, 1);

                        ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i] = value;

                    }

                    BITS_PARSE("delta_poc_msb_present_flag[ i ]", value, ps_bitstrm, 1);

                    ps_slice_hdr->ai1_delta_poc_msb_present_flag[i] = value;

                    ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] = 0;

                    if(ps_slice_hdr->ai1_delta_poc_msb_present_flag[i])

                    {

                        UEV_PARSE("delata_poc_msb_cycle_lt[ i ]", value, ps_bitstrm);

                        ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] = value;

                    }

                    if((i != 0) && (i != ps_slice_hdr->i1_num_long_term_sps))

                    {

                        ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i] += ps_slice_hdr->ai1_delta_poc_msb_cycle_lt[i - 1];

                    }

                }

            }

            for(i = 0; i < num_neg_pics + num_pos_pics; i++)

            {

                if(pi1_used[i])

                {

                    num_poc_total_curr++;

                }

            }

            for(i = 0; i < ps_slice_hdr->i1_num_long_term_sps + ps_slice_hdr->i1_num_long_term_pics; i++)

            {

                if(ps_slice_hdr->ai1_used_by_curr_pic_lt_flag[i])

                {

                    num_poc_total_curr++;

                }

            }

            if(ps_sps->i1_sps_temporal_mvp_enable_flag)

            {

                BITS_PARSE("enable_temporal_mvp_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_slice_temporal_mvp_enable_flag = value;

            }

        }

        ps_slice_hdr->i1_slice_sao_luma_flag = 0;

        ps_slice_hdr->i1_slice_sao_chroma_flag = 0;

        if(ps_sps->i1_sample_adaptive_offset_enabled_flag)

        {

            BITS_PARSE("slice_sao_luma_flag", value, ps_bitstrm, 1);

            ps_slice_hdr->i1_slice_sao_luma_flag = value;

            if (CHROMA_FMT_IDC_MONOCHROME != ps_sps->i1_chroma_format_idc) {

                BITS_PARSE("slice_sao_chroma_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_slice_sao_chroma_flag = value;

            }

        }

        ps_slice_hdr->i1_max_num_merge_cand = 1;

        ps_slice_hdr->i1_cabac_init_flag = 0;

        ps_slice_hdr->i1_num_ref_idx_l0_active = 0;

        ps_slice_hdr->i1_num_ref_idx_l1_active = 0;

        ps_slice_hdr->i1_slice_cb_qp_offset = 0;

        ps_slice_hdr->i1_slice_cr_qp_offset = 0;

        if((PSLICE == ps_slice_hdr->i1_slice_type) ||

           (BSLICE == ps_slice_hdr->i1_slice_type))

        {

            BITS_PARSE("num_ref_idx_active_override_flag", value, ps_bitstrm, 1);

            ps_slice_hdr->i1_num_ref_idx_active_override_flag = value;

            if(ps_slice_hdr->i1_num_ref_idx_active_override_flag)

            {

                UEV_PARSE("num_ref_idx_l0_active_minus1", value, ps_bitstrm);

                if(value > MAX_DPB_SIZE - 2)

                {

                    return IHEVCD_INVALID_PARAMETER;

                }

                ps_slice_hdr->i1_num_ref_idx_l0_active = value + 1;

                if(BSLICE == ps_slice_hdr->i1_slice_type)

                {

                    UEV_PARSE("num_ref_idx_l1_active_minus1", value, ps_bitstrm);

                    if(value > MAX_DPB_SIZE - 2)

                    {

                        return IHEVCD_INVALID_PARAMETER;

                    }

                    ps_slice_hdr->i1_num_ref_idx_l1_active = value + 1;

                }

            }

            else

            {

                ps_slice_hdr->i1_num_ref_idx_l0_active = ps_pps->i1_num_ref_idx_l0_default_active;

                if(BSLICE == ps_slice_hdr->i1_slice_type)

                {

                    ps_slice_hdr->i1_num_ref_idx_l1_active = ps_pps->i1_num_ref_idx_l1_default_active;

                }

            }

            if(0 == num_poc_total_curr)

                return IHEVCD_IGNORE_SLICE;

            if((ps_pps->i1_lists_modification_present_flag) && (num_poc_total_curr > 1))

            {

                ihevcd_ref_pic_list_modification(ps_bitstrm,

                                                 ps_slice_hdr, num_poc_total_curr);

            }

            else

            {

                ps_slice_hdr->s_rplm.i1_ref_pic_list_modification_flag_l0 = 0;

                ps_slice_hdr->s_rplm.i1_ref_pic_list_modification_flag_l1 = 0;

            }

            if(BSLICE == ps_slice_hdr->i1_slice_type)

            {

                BITS_PARSE("mvd_l1_zero_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_mvd_l1_zero_flag = value;

            }

            ps_slice_hdr->i1_cabac_init_flag = 0;

            if(ps_pps->i1_cabac_init_present_flag)

            {

                BITS_PARSE("cabac_init_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_cabac_init_flag = value;

            }

            ps_slice_hdr->i1_collocated_from_l0_flag = 1;

            ps_slice_hdr->i1_collocated_ref_idx = 0;

            if(ps_slice_hdr->i1_slice_temporal_mvp_enable_flag)

            {

                if(BSLICE == ps_slice_hdr->i1_slice_type)

                {

                    BITS_PARSE("collocated_from_l0_flag", value, ps_bitstrm, 1);

                    ps_slice_hdr->i1_collocated_from_l0_flag = value;

                }

                if((ps_slice_hdr->i1_collocated_from_l0_flag  &&  (ps_slice_hdr->i1_num_ref_idx_l0_active > 1)) ||

                   (!ps_slice_hdr->i1_collocated_from_l0_flag  && (ps_slice_hdr->i1_num_ref_idx_l1_active > 1)))

                {

                    UEV_PARSE("collocated_ref_idx", value, ps_bitstrm);

                    if((PSLICE == ps_slice_hdr->i1_slice_type || BSLICE == ps_slice_hdr->i1_slice_type) &&

                                    ps_slice_hdr->i1_collocated_from_l0_flag)

                    {

                        if(value >= ps_slice_hdr->i1_num_ref_idx_l0_active)

                        {

                            return IHEVCD_INVALID_PARAMETER;

                        }

                    }

                    if(BSLICE == ps_slice_hdr->i1_slice_type && !ps_slice_hdr->i1_collocated_from_l0_flag)

                    {

                        if(value >= ps_slice_hdr->i1_num_ref_idx_l1_active)

                        {

                            return IHEVCD_INVALID_PARAMETER;

                        }

                    }

                    ps_slice_hdr->i1_collocated_ref_idx = value;

                }

            }

            if((ps_pps->i1_weighted_pred_flag  &&   (PSLICE == ps_slice_hdr->i1_slice_type)) ||

               (ps_pps->i1_weighted_bipred_flag  &&  (BSLICE == ps_slice_hdr->i1_slice_type)))

            {

                ihevcd_parse_pred_wt_ofst(ps_bitstrm, ps_sps, ps_pps, ps_slice_hdr);

            }

            UEV_PARSE("five_minus_max_num_merge_cand", value, ps_bitstrm);

            if(value > 4)

            {

                return IHEVCD_INVALID_PARAMETER;

            }

            ps_slice_hdr->i1_max_num_merge_cand = 5 - value;

        }

        SEV_PARSE("slice_qp_delta", i4_value, ps_bitstrm);

        if((i4_value < (MIN_HEVC_QP - ps_pps->i1_pic_init_qp)) ||

           (i4_value > (MAX_HEVC_QP - ps_pps->i1_pic_init_qp)))

        {

            return IHEVCD_INVALID_PARAMETER;

        }

        ps_slice_hdr->i1_slice_qp_delta = i4_value;

        if(ps_pps->i1_pic_slice_level_chroma_qp_offsets_present_flag)

        {

            SEV_PARSE("slice_cb_qp_offset", i4_value, ps_bitstrm);

            if(i4_value < -12 || i4_value > 12)

            {

                return IHEVCD_INVALID_PARAMETER;

            }

            ps_slice_hdr->i1_slice_cb_qp_offset = i4_value;

            SEV_PARSE("slice_cr_qp_offset", i4_value, ps_bitstrm);

            if(i4_value < -12 || i4_value > 12)

            {

                return IHEVCD_INVALID_PARAMETER;

            }

            ps_slice_hdr->i1_slice_cr_qp_offset = i4_value;

        }

        ps_slice_hdr->i1_deblocking_filter_override_flag = 0;

        ps_slice_hdr->i1_slice_disable_deblocking_filter_flag  = ps_pps->i1_pic_disable_deblocking_filter_flag;

        ps_slice_hdr->i1_beta_offset_div2 = ps_pps->i1_beta_offset_div2;

        ps_slice_hdr->i1_tc_offset_div2 = ps_pps->i1_tc_offset_div2;

        disable_deblocking_filter_flag = ps_pps->i1_pic_disable_deblocking_filter_flag;

        if(ps_pps->i1_deblocking_filter_control_present_flag)

        {

            if(ps_pps->i1_deblocking_filter_override_enabled_flag)

            {

                BITS_PARSE("deblocking_filter_override_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_deblocking_filter_override_flag = value;

            }

            if(ps_slice_hdr->i1_deblocking_filter_override_flag)

            {

                BITS_PARSE("slice_disable_deblocking_filter_flag", value, ps_bitstrm, 1);

                ps_slice_hdr->i1_slice_disable_deblocking_filter_flag = value;

                disable_deblocking_filter_flag = ps_slice_hdr->i1_slice_disable_deblocking_filter_flag;

                if(!ps_slice_hdr->i1_slice_disable_deblocking_filter_flag)

                {

                    SEV_PARSE("beta_offset_div2", i4_value, ps_bitstrm);

                    if(i4_value < -6 || i4_value > 6)

                    {

                        return IHEVCD_INVALID_PARAMETER;

                    }

                    ps_slice_hdr->i1_beta_offset_div2 = i4_value;

                    SEV_PARSE("tc_offset_div2", i4_value, ps_bitstrm);

                    if(i4_value < -6 || i4_value > 6)

                    {

                        return IHEVCD_INVALID_PARAMETER;

                    }

                    ps_slice_hdr->i1_tc_offset_div2 = i4_value;

                }

            }

        }

        ps_slice_hdr->i1_slice_loop_filter_across_slices_enabled_flag = ps_pps->i1_loop_filter_across_slices_enabled_flag;

        if(ps_pps->i1_loop_filter_across_slices_enabled_flag  &&

                        (ps_slice_hdr->i1_slice_sao_luma_flag  ||  ps_slice_hdr->i1_slice_sao_chroma_flag  || !disable_deblocking_filter_flag))

        {

            BITS_PARSE("slice_loop_filter_across_slices_enabled_flag", value, ps_bitstrm, 1);

            ps_slice_hdr->i1_slice_loop_filter_across_slices_enabled_flag = value;

        }

    }

    /* Check sanity of slice */

    if((!first_slice_in_pic_flag) &&

                    (ps_codec->i4_pic_present))

    {

        slice_header_t *ps_slice_hdr_base = ps_codec->ps_slice_hdr_base;

        /* According to the standard, the above conditions must be satisfied - But for error resilience,

         * only the following conditions are checked */

        if((ps_slice_hdr_base->i1_pps_id != ps_slice_hdr->i1_pps_id) ||

                        (ps_slice_hdr_base->i4_pic_order_cnt_lsb != ps_slice_hdr->i4_pic_order_cnt_lsb))

        {

            return IHEVCD_IGNORE_SLICE;

        }

    }

    if(0 == ps_codec->i4_pic_present)

    {

        ps_slice_hdr->i4_abs_pic_order_cnt = ihevcd_calc_poc(ps_codec, ps_nal, ps_sps->i1_log2_max_pic_order_cnt_lsb, ps_slice_hdr->i4_pic_order_cnt_lsb);

    }

    else

    {

        ps_slice_hdr->i4_abs_pic_order_cnt = ps_codec->s_parse.i4_abs_pic_order_cnt;

    }

    if(!first_slice_in_pic_flag)

    {

        /* Check if the current slice belongs to the same pic (Pic being parsed) */

        if(ps_codec->s_parse.i4_abs_pic_order_cnt == ps_slice_hdr->i4_abs_pic_order_cnt)

        {

            /* If the Next CTB's index is less than the slice address,

             * the previous slice is incomplete.

             * Indicate slice error, and treat the remaining CTBs as skip */

            if(slice_address > ps_codec->s_parse.i4_next_ctb_indx)

            {

                if(ps_codec->i4_pic_present)

                {

                    prev_slice_incomplete_flag = 1;

                    ps_codec->i4_slice_error = 1;

                    ps_codec->s_parse.i4_cur_slice_idx--;

                    if(ps_codec->s_parse.i4_cur_slice_idx < 0)

                        ps_codec->s_parse.i4_cur_slice_idx = 0;

                }

                return IHEVCD_IGNORE_SLICE;

            }

            /* If the slice address is less than the next CTB's index,

             * extra CTBs have been decoded in the previous slice.

             * Ignore the current slice. Treat it as incomplete */

            else if(slice_address < ps_codec->s_parse.i4_next_ctb_indx)

            {

                return IHEVCD_IGNORE_SLICE;

            }

            else

            {

                ps_codec->i4_slice_error = 0;

            }

        }

        /* The current slice does not belong to the pic that is being parsed */

        else

        {

            /* The previous pic is incomplete.

             * Treat the remaining CTBs as skip */

            if(ps_codec->i4_pic_present)

            {

                slice_header_t *ps_slice_hdr_next;

                ps_codec->i4_slice_error = 1;

                ps_codec->s_parse.i4_cur_slice_idx--;

                if(ps_codec->s_parse.i4_cur_slice_idx < 0)

                    ps_codec->s_parse.i4_cur_slice_idx = 0;

                ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + ((ps_codec->s_parse.i4_cur_slice_idx + 1) & (MAX_SLICE_HDR_CNT - 1));

                ps_slice_hdr_next->i2_ctb_x = 0;

                ps_slice_hdr_next->i2_ctb_y = ps_codec->s_parse.ps_sps->i2_pic_ht_in_ctb;

                return ret;

            }

            /* If the previous pic is complete,

             * return if the current slice is dependant

             * otherwise, update the parse context's POC */

            else

            {

                if(ps_slice_hdr->i1_dependent_slice_flag)

                    return IHEVCD_IGNORE_SLICE;

                ps_codec->s_parse.i4_abs_pic_order_cnt = ps_slice_hdr->i4_abs_pic_order_cnt;

            }

        }

    }

    /* If the slice is the first slice in the pic, update the parse context's POC */

    else

    {

        /* If the first slice is repeated, ignore the second occurrence

         * If any other slice is repeated, the CTB addr will be greater than the slice addr,

         * and hence the second occurrence is ignored */

        if(ps_codec->s_parse.i4_abs_pic_order_cnt == ps_slice_hdr->i4_abs_pic_order_cnt)

            return IHEVCD_IGNORE_SLICE;

        ps_codec->s_parse.i4_abs_pic_order_cnt = ps_slice_hdr->i4_abs_pic_order_cnt;

    }

    // printf("POC: %d\n", ps_slice_hdr->i4_abs_pic_order_cnt);

    // AEV_TRACE("POC", ps_slice_hdr->i4_abs_pic_order_cnt, 0);

    ps_slice_hdr->i4_num_entry_point_offsets = 0;

    if((ps_pps->i1_tiles_enabled_flag) ||

       (ps_pps->i1_entropy_coding_sync_enabled_flag))

    {

        UEV_PARSE("num_entry_point_offsets", value, ps_bitstrm);

        ps_slice_hdr->i4_num_entry_point_offsets = value;

        {

            WORD32 max_num_entry_point_offsets;

            if((ps_pps->i1_tiles_enabled_flag) &&

                            (ps_pps->i1_entropy_coding_sync_enabled_flag))

            {

                max_num_entry_point_offsets = ps_pps->i1_num_tile_columns * ps_sps->i2_pic_ht_in_ctb - 1;

            }

            else if(ps_pps->i1_tiles_enabled_flag)

            {

                max_num_entry_point_offsets = ps_pps->i1_num_tile_columns * ps_pps->i1_num_tile_rows - 1 ;

            }

            else

            {

                max_num_entry_point_offsets = (ps_sps->i2_pic_ht_in_ctb - 1);

            }

            if(ps_slice_hdr->i4_num_entry_point_offsets < 0 || ps_slice_hdr->i4_num_entry_point_offsets > max_num_entry_point_offsets)

            {

                return IHEVCD_INVALID_PARAMETER;

            }

        }

        if(ps_slice_hdr->i4_num_entry_point_offsets > 0)

        {

            UEV_PARSE("offset_len_minus1", value, ps_bitstrm);

            if(value > 31)

            {

                return IHEVCD_INVALID_PARAMETER;

            }

            ps_slice_hdr->i1_offset_len = value + 1;

            for(i = 0; i < ps_slice_hdr->i4_num_entry_point_offsets; i++)

            {

                BITS_PARSE("entry_point_offset", value, ps_bitstrm, ps_slice_hdr->i1_offset_len);

                /* TODO: pu4_entry_point_offset needs to be initialized */

                //ps_slice_hdr->pu4_entry_point_offset[i] = value;

            }

        }

    }

    if(ps_pps->i1_slice_header_extension_present_flag)

    {

        UEV_PARSE("slice_header_extension_length", value, ps_bitstrm);

        if(value > 256)

        {

            return IHEVCD_INVALID_PARAMETER;

        }

        ps_slice_hdr->i2_slice_header_extension_length = value;

        for(i = 0; i < ps_slice_hdr->i2_slice_header_extension_length; i++)

        {

            BITS_PARSE("slice_header_extension_data_byte", value, ps_bitstrm, 8);

        }

    }

    ihevcd_bits_flush_to_byte_boundary(ps_bitstrm);

    if((UWORD8 *)ps_bitstrm->pu4_buf > ps_bitstrm->pu1_buf_max)

        return IHEVCD_INVALID_PARAMETER;

    {

        dpb_mgr_t *ps_dpb_mgr = (dpb_mgr_t *)ps_codec->pv_dpb_mgr;

        WORD32 r_idx;

        if((NAL_IDR_W_LP == ps_slice_hdr->i1_nal_unit_type) ||

                        (NAL_IDR_N_LP == ps_slice_hdr->i1_nal_unit_type)  ||

                        (NAL_BLA_N_LP == ps_slice_hdr->i1_nal_unit_type)  ||

                        (NAL_BLA_W_DLP == ps_slice_hdr->i1_nal_unit_type) ||

                        (NAL_BLA_W_LP == ps_slice_hdr->i1_nal_unit_type)  ||

                        (0 == ps_codec->u4_pic_cnt))

        {

            for(i = 0; i < MAX_DPB_BUFS; i++)

            {

                if(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf)

                {

                    pic_buf_t *ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;

                    mv_buf_t *ps_mv_buf;

                    /* Long term index is set to MAX_DPB_BUFS to ensure it is not added as LT */

                    ihevc_dpb_mgr_del_ref((dpb_mgr_t *)ps_codec->pv_dpb_mgr, (buf_mgr_t *)ps_codec->pv_pic_buf_mgr, ps_pic_buf->i4_abs_poc);

                    /* Find buffer id of the MV bank corresponding to the buffer being freed (Buffer with POC of u4_abs_poc) */

                    ps_mv_buf = (mv_buf_t *)ps_codec->ps_mv_buf;

                    for(j = 0; j < ps_codec->i4_max_dpb_size; j++)

                    {

                        if(ps_mv_buf && ps_mv_buf->i4_abs_poc == ps_pic_buf->i4_abs_poc)

                        {

                            ihevc_buf_mgr_release((buf_mgr_t *)ps_codec->pv_mv_buf_mgr, j, BUF_MGR_REF);

                            break;

                        }

                        ps_mv_buf++;

                    }

                }

            }

            /* Initialize the reference lists to NULL

             * This is done to take care of the cases where the first pic is not IDR

             * but the reference list is not created for the first pic because

             * pic count is zero leaving the reference list uninitialised  */

            for(r_idx = 0; r_idx < MAX_DPB_SIZE; r_idx++)

            {

                ps_slice_hdr->as_ref_pic_list0[r_idx].pv_pic_buf = NULL;

                ps_slice_hdr->as_ref_pic_list0[r_idx].pv_mv_buf = NULL;

                ps_slice_hdr->as_ref_pic_list1[r_idx].pv_pic_buf = NULL;

                ps_slice_hdr->as_ref_pic_list1[r_idx].pv_mv_buf = NULL;

            }

        }

        else

        {

            ret = ihevcd_ref_list(ps_codec, ps_pps, ps_sps, ps_slice_hdr);

            if ((WORD32)IHEVCD_SUCCESS != ret)

            {

                return ret;

            }

        }

    }

    /* Fill the remaining entries of the reference lists with the nearest POC

     * This is done to handle cases where there is a corruption in the reference index */

    if(ps_codec->i4_pic_present)

    {

        pic_buf_t *ps_pic_buf_ref;

        mv_buf_t *ps_mv_buf_ref;

        WORD32 r_idx;

        dpb_mgr_t *ps_dpb_mgr = (dpb_mgr_t *)ps_codec->pv_dpb_mgr;

        buf_mgr_t *ps_mv_buf_mgr = (buf_mgr_t *)ps_codec->pv_mv_buf_mgr;

        ps_pic_buf_ref = ihevc_dpb_mgr_get_ref_by_nearest_poc(ps_dpb_mgr, ps_slice_hdr->i4_abs_pic_order_cnt);

        if(NULL == ps_pic_buf_ref)

        {

            ps_pic_buf_ref = ps_codec->as_process[0].ps_cur_pic;

            ps_mv_buf_ref = ps_codec->s_parse.ps_cur_mv_buf;

        }

        else

        {

            ps_mv_buf_ref = ihevcd_mv_mgr_get_poc(ps_mv_buf_mgr, ps_pic_buf_ref->i4_abs_poc);

        }