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

 *

 * 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_pslice.c

 *

 * \brief

 *    Contains routines that decode a I slice type

 *

 * Detailed_description

 *

 * \date

 *    07/07/2003

 *

 * \author  NS

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

 */

#include <string.h>

#include "ih264_defs.h"

#include "ih264d_bitstrm.h"

#include "ih264d_defs.h"

#include "ih264d_debug.h"

#include "ih264d_tables.h"

#include "ih264d_structs.h"

#include "ih264d_defs.h"

#include "ih264d_parse_cavlc.h"

#include "ih264d_mb_utils.h"

#include "ih264d_parse_slice.h"

#include "ih264d_mvpred.h"

#include "ih264d_parse_islice.h"

#include "ih264d_process_intra_mb.h"

#include "ih264d_inter_pred.h"

#include "ih264d_process_pslice.h"

#include "ih264d_deblocking.h"

#include "ih264d_cabac.h"

#include "ih264d_parse_mb_header.h"

#include "ih264d_error_handler.h"

#include "ih264d_defs.h"

#include "ih264d_format_conv.h"

#include "ih264d_quant_scaling.h"

#include "ih264d_thread_parse_decode.h"

#include "ih264d_thread_compute_bs.h"

#include "ih264d_process_bslice.h"

#include "ithread.h"

#include "ih264d_utils.h"

#include "ih264d_format_conv.h"

void ih264d_init_cabac_contexts(UWORD8 u1_slice_type, dec_struct_t * ps_dec);

void ih264d_deblock_mb_level(dec_struct_t *ps_dec,

                             dec_mb_info_t *ps_cur_mb_info,

                             UWORD32 nmb_index);

/*!

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

 * \if Function name : ih264d_parse_pmb_cavlc \endif

 *

 * \brief

 *    This function parses CAVLC syntax of a P MB.

 *

 * \return

 *    0 on Success and Error code otherwise

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

 */

WORD32 ih264d_parse_pmb_cavlc(dec_struct_t * ps_dec,

                              dec_mb_info_t * ps_cur_mb_info,

                              UWORD32 u4_mb_num,

                              UWORD32 u4_num_mbsNby2)

{

    UWORD32 u1_num_mb_part;

    UWORD32 uc_sub_mb;

    dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;

    UWORD32 * const pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;

    UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;

    parse_pmbarams_t * ps_parse_mb_data = ps_dec->ps_parse_mb_data

                    + u4_num_mbsNby2;

    WORD8 * pi1_ref_idx = ps_parse_mb_data->i1_ref_idx[0];

    const UWORD8 u1_mbaff = ps_dec->ps_cur_slice->u1_mbaff_frame_flag;

    const UWORD8 * pu1_num_mb_part = (const UWORD8 *)gau1_ih264d_num_mb_part;

    UWORD8 * pu1_col_info = ps_parse_mb_data->u1_col_info;

    UWORD32 u1_mb_type = ps_cur_mb_info->u1_mb_type;

    UWORD32 u4_sum_mb_mode_pack = 0;

    WORD32 ret;

    UWORD8 u1_no_submb_part_size_lt8x8_flag = 1;

    ps_cur_mb_info->u1_tran_form8x8 = 0;

    ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;

    ps_cur_mb_info->u1_yuv_dc_block_flag = 0;

    ps_cur_mb_info->u1_mb_mc_mode = u1_mb_type;

    uc_sub_mb = ((u1_mb_type == PRED_8x8) | (u1_mb_type == PRED_8x8R0));

    /* Reading the subMB type */

    if(uc_sub_mb)

    {

        WORD32 i;

        UWORD8 u1_colz = (PRED_8x8 << 6);

        for(i = 0; i < 4; i++)

        {

            UWORD32 ui_sub_mb_mode;

            //Inlined ih264d_uev

            UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;

            UWORD32 u4_word, u4_ldz;

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

            /* Find leading zeros in next 32 bits                          */

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

            NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);

            u4_ldz = CLZ(u4_word);

            /* Flush the ps_bitstrm */

            u4_bitstream_offset += (u4_ldz + 1);

            /* Read the suffix from the ps_bitstrm */

            u4_word = 0;

            if(u4_ldz)

                GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,

                        u4_ldz);

            *pu4_bitstrm_ofst = u4_bitstream_offset;

            ui_sub_mb_mode = ((1 << u4_ldz) + u4_word - 1);

            //Inlined ih264d_uev

            if(ui_sub_mb_mode > 3)

            {

                return ERROR_SUB_MB_TYPE;

            }

            else

            {

                u4_sum_mb_mode_pack = (u4_sum_mb_mode_pack << 8) | ui_sub_mb_mode;

                /* Storing collocated information */

                *pu1_col_info++ = u1_colz | (UWORD8)(ui_sub_mb_mode << 4);

                COPYTHECONTEXT("sub_mb_type", ui_sub_mb_mode);

            }

            /* check if Motion compensation is done below 8x8 */

            if(ui_sub_mb_mode != P_L0_8x8)

            {

                u1_no_submb_part_size_lt8x8_flag = 0;

            }

        }

        //

        u1_num_mb_part = 4;

    }

    else

    {

        *pu1_col_info++ = (u1_mb_type << 6);

        if(u1_mb_type)

            *pu1_col_info++ = (u1_mb_type << 6);

        u1_num_mb_part = pu1_num_mb_part[u1_mb_type];

    }

    /* Decoding reference index 0: For simple profile the following   */

    /* conditions are always true (mb_field_decoding_flag == 0);      */

    /* (MbPartPredMode != PredL1)                                     */

    {

        UWORD8 uc_field = ps_cur_mb_info->u1_mb_field_decodingflag;

        UWORD8 uc_num_ref_idx_l0_active_minus1 =

                        (ps_dec->ps_cur_slice->u1_num_ref_idx_lx_active[0]

                                        << (u1_mbaff & uc_field)) - 1;

        if((uc_num_ref_idx_l0_active_minus1 > 0) & (u1_mb_type != PRED_8x8R0))

        {

            if(1 == uc_num_ref_idx_l0_active_minus1)

                ih264d_parse_pmb_ref_index_cavlc_range1(

                                u1_num_mb_part, ps_bitstrm, pi1_ref_idx,

                                uc_num_ref_idx_l0_active_minus1);

            else

            {

                ret = ih264d_parse_pmb_ref_index_cavlc(

                                u1_num_mb_part, ps_bitstrm, pi1_ref_idx,

                                uc_num_ref_idx_l0_active_minus1);

                if(ret != OK)

                    return ret;

            }

        }

        else

        {

            /* When there exists only a single frame to predict from */

            UWORD32 uc_i;

            for(uc_i = 0; uc_i < u1_num_mb_part; uc_i++)

                /* Storing Reference Idx Information */

                pi1_ref_idx[uc_i] = 0;

        }

    }

    {

        UWORD8 u1_p_idx;

        UWORD32 uc_i;

        parse_part_params_t * ps_part = ps_dec->ps_part;

        UWORD8 u1_sub_mb_mode, u1_num_subpart, u1_mb_part_width, u1_mb_part_height;

        UWORD32 u4_sub_mb_num;

        const UWORD8 * pu1_top_left_sub_mb_indx;

        mv_pred_t * ps_mv, *ps_mv_start = ps_dec->ps_mv_cur + (u4_mb_num << 4);

        /* Loading the table pointers */

        const UWORD8 * pu1_mb_partw = (const UWORD8 *)gau1_ih264d_mb_partw;

        const UWORD8 * pu1_mb_parth = (const UWORD8 *)gau1_ih264d_mb_parth;

        const UWORD8 * pu1_sub_mb_indx_mod =

                        (const UWORD8 *)(gau1_ih264d_submb_indx_mod)

                                        + (uc_sub_mb * 6);

        const UWORD8 * pu1_sub_mb_partw = (const UWORD8 *)gau1_ih264d_submb_partw;

        const UWORD8 * pu1_sub_mb_parth = (const UWORD8 *)gau1_ih264d_submb_parth;

        const UWORD8 * pu1_num_sub_mb_part =

                        (const UWORD8 *)gau1_ih264d_num_submb_part;

        UWORD16 u2_sub_mb_num = 0x028A;

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

        /* default initialisations for condition (uc_sub_mb == 0) */

        /* i.e. all are subpartitions of 8x8                     */

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

        u1_sub_mb_mode = 0;

        u1_num_subpart = 1;

        u1_mb_part_width = pu1_mb_partw[u1_mb_type];

        u1_mb_part_height = pu1_mb_parth[u1_mb_type];

        pu1_top_left_sub_mb_indx = pu1_sub_mb_indx_mod + (u1_mb_type << 1);

        u4_sub_mb_num = 0;

        /* Loop on number of partitions */

        for(uc_i = 0, u1_p_idx = 0; uc_i < u1_num_mb_part; uc_i++)

        {

            UWORD8 uc_j;

            if(uc_sub_mb)

            {

                u1_sub_mb_mode = u4_sum_mb_mode_pack >> 24;

                u1_num_subpart = pu1_num_sub_mb_part[u1_sub_mb_mode];

                u1_mb_part_width = pu1_sub_mb_partw[u1_sub_mb_mode];

                u1_mb_part_height = pu1_sub_mb_parth[u1_sub_mb_mode];

                pu1_top_left_sub_mb_indx = pu1_sub_mb_indx_mod + (u1_sub_mb_mode << 1);

                u4_sub_mb_num = u2_sub_mb_num >> 12;

                u4_sum_mb_mode_pack <<= 8;

                u2_sub_mb_num <<= 4;

            }

            /* Loop on Number of sub-partitions */

            for(uc_j = 0; uc_j < u1_num_subpart; uc_j++, pu1_top_left_sub_mb_indx++)

            {

                WORD16 i2_mvx, i2_mvy;

                u4_sub_mb_num += *pu1_top_left_sub_mb_indx;

                ps_mv = ps_mv_start + u4_sub_mb_num;

                /* Reading the differential Mv from the bitstream */

                //i2_mvx = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);

                //inlining ih264d_sev

                {

                    UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;

                    UWORD32 u4_word, u4_ldz, u4_abs_val;

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

                    /* Find leading zeros in next 32 bits                          */

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

                    NEXTBITS_32(u4_word, u4_bitstream_offset,

                                pu4_bitstrm_buf);

                    u4_ldz = CLZ(u4_word);

                    /* Flush the ps_bitstrm */

                    u4_bitstream_offset += (u4_ldz + 1);

                    /* Read the suffix from the ps_bitstrm */

                    u4_word = 0;

                    if(u4_ldz)

                        GETBITS(u4_word, u4_bitstream_offset,

                                pu4_bitstrm_buf, u4_ldz);

                    *pu4_bitstrm_ofst = u4_bitstream_offset;

                    u4_abs_val = ((1 << u4_ldz) + u4_word) >> 1;

                    if(u4_word & 0x1)

                        i2_mvx = (-(WORD32)u4_abs_val);

                    else

                        i2_mvx = (u4_abs_val);

                }

                //inlinined ih264d_sev

                COPYTHECONTEXT("MVD", i2_mvx);

                i2_mvy = ih264d_sev(pu4_bitstrm_ofst,

                                     pu4_bitstrm_buf);

                COPYTHECONTEXT("MVD", i2_mvy);

                /* Storing Info for partitions */

                ps_part->u1_is_direct = PART_NOT_DIRECT;

                ps_part->u1_sub_mb_num = u4_sub_mb_num;

                ps_part->u1_partheight = u1_mb_part_height;

                ps_part->u1_partwidth = u1_mb_part_width;

                /* Storing Mv residuals */

                ps_mv->i2_mv[0] = i2_mvx;

                ps_mv->i2_mv[1] = i2_mvy;

                /* Increment partition Index */

                u1_p_idx++;

                ps_part++;

            }

        }

        ps_parse_mb_data->u1_num_part = u1_p_idx;

        ps_dec->ps_part = ps_part;

    }

    {

        UWORD32 u4_cbp;

        /* Read the Coded block pattern */

        UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;

        UWORD32 u4_word, u4_ldz;

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

        /* Find leading zeros in next 32 bits                          */

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

        NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);

        u4_ldz = CLZ(u4_word);

        /* Flush the ps_bitstrm */

        u4_bitstream_offset += (u4_ldz + 1);

        /* Read the suffix from the ps_bitstrm */

        u4_word = 0;

        if(u4_ldz)

            GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf, u4_ldz);

        *pu4_bitstrm_ofst = u4_bitstream_offset;

        u4_cbp = ((1 << u4_ldz) + u4_word - 1);

        if(u4_cbp > 47)

            return ERROR_CBP;

        u4_cbp = *((UWORD8*)gau1_ih264d_cbp_inter + u4_cbp);

        COPYTHECONTEXT("coded_block_pattern", u4_cbp);

        ps_cur_mb_info->u1_cbp = u4_cbp;

        /* Read the transform8x8 u4_flag if present */

        if((ps_dec->s_high_profile.u1_transform8x8_present) && (u4_cbp & 0xf)

                        && u1_no_submb_part_size_lt8x8_flag)

        {

            ps_cur_mb_info->u1_tran_form8x8 = ih264d_get_bit_h264(ps_bitstrm);

            COPYTHECONTEXT("transform_size_8x8_flag", ps_cur_mb_info->u1_tran_form8x8);

            ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = ps_cur_mb_info->u1_tran_form8x8;

        }

        /* Read mb_qp_delta */

        if(u4_cbp)

        {

            WORD32 i_temp;

            UWORD32 u4_bitstream_offset = *pu4_bitstrm_ofst;

            UWORD32 u4_word, u4_ldz, u4_abs_val;

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

            /* Find leading zeros in next 32 bits                          */

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

            NEXTBITS_32(u4_word, u4_bitstream_offset, pu4_bitstrm_buf);

            u4_ldz = CLZ(u4_word);

            /* Flush the ps_bitstrm */

            u4_bitstream_offset += (u4_ldz + 1);

            /* Read the suffix from the ps_bitstrm */

            u4_word = 0;

            if(u4_ldz)

                GETBITS(u4_word, u4_bitstream_offset, pu4_bitstrm_buf,

                        u4_ldz);

            *pu4_bitstrm_ofst = u4_bitstream_offset;

            u4_abs_val = ((1 << u4_ldz) + u4_word) >> 1;

            if(u4_word & 0x1)

                i_temp = (-(WORD32)u4_abs_val);

            else

                i_temp = (u4_abs_val);

            if((i_temp < -26) || (i_temp > 25))

                return ERROR_INV_RANGE_QP_T;

            //inlinined ih264d_sev

            COPYTHECONTEXT("mb_qp_delta", i_temp);

            if(i_temp)

            {

                ret = ih264d_update_qp(ps_dec, (WORD8)i_temp);

                if(ret != OK)

                    return ret;

            }

            ret = ih264d_parse_residual4x4_cavlc(ps_dec, ps_cur_mb_info, 0);

            if(ret != OK)

                return ret;

            if(EXCEED_OFFSET(ps_bitstrm))

                return ERROR_EOB_TERMINATE_T;

        }

        else

        {

            ih264d_update_nnz_for_skipmb(ps_dec, ps_cur_mb_info, CAVLC);

        }

    }

    return OK;

}

/*!

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

 * \if Function name : ih264d_parse_pmb_cabac \endif

 *

 * \brief

 *    This function parses CABAC syntax of a P MB.

 *

 * \return

 *    0 on Success and Error code otherwise

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

 */

WORD32 ih264d_parse_pmb_cabac(dec_struct_t * ps_dec,

                              dec_mb_info_t * ps_cur_mb_info,

                              UWORD32 u4_mb_num,

                              UWORD32 u4_num_mbsNby2)

{

    UWORD32 u1_num_mb_part;

    UWORD32 uc_sub_mb;

    parse_pmbarams_t * ps_parse_mb_data = ps_dec->ps_parse_mb_data

                    + u4_num_mbsNby2;

    WORD8 * pi1_ref_idx = ps_parse_mb_data->i1_ref_idx[0];

    const UWORD8 * pu1_num_mb_part = (const UWORD8 *)gau1_ih264d_num_mb_part;

    const UWORD32 u1_mb_type = ps_cur_mb_info->u1_mb_type;

    UWORD8 * pu1_col_info = ps_parse_mb_data->u1_col_info;

    UWORD32 u1_mb_mc_mode = u1_mb_type;

    ctxt_inc_mb_info_t * p_curr_ctxt = ps_dec->ps_curr_ctxt_mb_info;

    decoding_envirnoment_t * ps_cab_env = &ps_dec->s_cab_dec_env;

    dec_bit_stream_t * ps_bitstrm = ps_dec->ps_bitstrm;

    UWORD32 u4_sub_mb_pack = 0;

    WORD32 ret;

    UWORD8 u1_no_submb_part_size_lt8x8_flag = 1;

    ps_cur_mb_info->u1_tran_form8x8 = 0;

    ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;

    ps_cur_mb_info->u1_yuv_dc_block_flag = 0;

    p_curr_ctxt->u1_mb_type = CAB_P;

    ps_cur_mb_info->u1_mb_mc_mode = u1_mb_type;

    uc_sub_mb = ((u1_mb_type == PRED_8x8) | (u1_mb_type == PRED_8x8R0));

    /* Reading the subMB type */

    if(uc_sub_mb)

    {

        UWORD8 u1_colz = (PRED_8x8 << 6);

        u1_mb_mc_mode = 0;

        {

            UWORD8 u1_sub_mb_mode;

            u1_sub_mb_mode = ih264d_parse_submb_type_cabac(

                            0, ps_cab_env, ps_bitstrm,

                            ps_dec->p_sub_mb_type_t);

            if(u1_sub_mb_mode > 3)

                return ERROR_SUB_MB_TYPE;

            u4_sub_mb_pack = (u4_sub_mb_pack << 8) | u1_sub_mb_mode;

            /* Storing collocated information */

            *pu1_col_info++ = u1_colz | ((UWORD8)(u1_sub_mb_mode << 4));

            COPYTHECONTEXT("sub_mb_type", u1_sub_mb_mode);

            /* check if Motion compensation is done below 8x8 */

            if(u1_sub_mb_mode != P_L0_8x8)

            {

                u1_no_submb_part_size_lt8x8_flag = 0;

            }

        }

        {

            UWORD8 u1_sub_mb_mode;

            u1_sub_mb_mode = ih264d_parse_submb_type_cabac(

                            0, ps_cab_env, ps_bitstrm,

                            ps_dec->p_sub_mb_type_t);

            if(u1_sub_mb_mode > 3)

                return ERROR_SUB_MB_TYPE;

            u4_sub_mb_pack = (u4_sub_mb_pack << 8) | u1_sub_mb_mode;

            /* Storing collocated information */

            *pu1_col_info++ = u1_colz | ((UWORD8)(u1_sub_mb_mode << 4));

            COPYTHECONTEXT("sub_mb_type", u1_sub_mb_mode);

            /* check if Motion compensation is done below 8x8 */

            if(u1_sub_mb_mode != P_L0_8x8)

            {

                u1_no_submb_part_size_lt8x8_flag = 0;

            }

        }

        {

            UWORD8 u1_sub_mb_mode;

            u1_sub_mb_mode = ih264d_parse_submb_type_cabac(

                            0, ps_cab_env, ps_bitstrm,

                            ps_dec->p_sub_mb_type_t);

            if(u1_sub_mb_mode > 3)

                return ERROR_SUB_MB_TYPE;

            u4_sub_mb_pack = (u4_sub_mb_pack << 8) | u1_sub_mb_mode;

            /* Storing collocated information */

            *pu1_col_info++ = u1_colz | ((UWORD8)(u1_sub_mb_mode << 4));

            COPYTHECONTEXT("sub_mb_type", u1_sub_mb_mode);

            /* check if Motion compensation is done below 8x8 */

            if(u1_sub_mb_mode != P_L0_8x8)

            {

                u1_no_submb_part_size_lt8x8_flag = 0;

            }

        }

        {

            UWORD8 u1_sub_mb_mode;

            u1_sub_mb_mode = ih264d_parse_submb_type_cabac(

                            0, ps_cab_env, ps_bitstrm,

                            ps_dec->p_sub_mb_type_t);

            if(u1_sub_mb_mode > 3)

                return ERROR_SUB_MB_TYPE;

            u4_sub_mb_pack = (u4_sub_mb_pack << 8) | u1_sub_mb_mode;

            /* Storing collocated information */

            *pu1_col_info++ = u1_colz | ((UWORD8)(u1_sub_mb_mode << 4));

            COPYTHECONTEXT("sub_mb_type", u1_sub_mb_mode);

            /* check if Motion compensation is done below 8x8 */

            if(u1_sub_mb_mode != P_L0_8x8)

            {

                u1_no_submb_part_size_lt8x8_flag = 0;

            }

        }

        u1_num_mb_part = 4;

    }

    else

    {

        u1_num_mb_part = pu1_num_mb_part[u1_mb_type];

        /* Storing collocated Mb and SubMb mode information */

        *pu1_col_info++ = (u1_mb_type << 6);

        if(u1_mb_type)

            *pu1_col_info++ = (u1_mb_type << 6);

    }

    /* Decoding reference index 0: For simple profile the following   */

    /* conditions are always true (mb_field_decoding_flag == 0);      */

    /* (MbPartPredMode != PredL1)                                     */

    {

        WORD8 * pi1_top_ref_idx_ctx_inc_arr = p_curr_ctxt->i1_ref_idx;

        WORD8 * pi1_left_ref_idx_ctxt_inc = ps_dec->pi1_left_ref_idx_ctxt_inc;

        UWORD8 u1_mbaff = ps_dec->ps_cur_slice->u1_mbaff_frame_flag;

        UWORD8 uc_field = ps_cur_mb_info->u1_mb_field_decodingflag;

        UWORD8 uc_num_ref_idx_l0_active_minus1 =

                        (ps_dec->ps_cur_slice->u1_num_ref_idx_lx_active[0]

                                        << (u1_mbaff & uc_field)) - 1;

        if((uc_num_ref_idx_l0_active_minus1 > 0) & (u1_mb_type != PRED_8x8R0))

        {

            /* force the routine to decode ref idx for each partition */

            *((UWORD32 *)pi1_ref_idx) = 0x01010101;

            ret = ih264d_parse_ref_idx_cabac(u1_num_mb_part, 0,

                                             uc_num_ref_idx_l0_active_minus1,

                                             u1_mb_mc_mode, pi1_ref_idx,

                                             pi1_left_ref_idx_ctxt_inc,

                                             pi1_top_ref_idx_ctx_inc_arr, ps_cab_env,

                                             ps_bitstrm, ps_dec->p_ref_idx_t);

            if(ret != OK)

                return ret;

        }

        else

        {

            /* When there exists only a single frame to predict from */

            pi1_left_ref_idx_ctxt_inc[0] = 0;

            pi1_left_ref_idx_ctxt_inc[1] = 0;

            pi1_top_ref_idx_ctx_inc_arr[0] = 0;

            pi1_top_ref_idx_ctx_inc_arr[1] = 0;

            *((UWORD32 *)pi1_ref_idx) = 0;

        }

    }

    {

        UWORD8 u1_p_idx;

        UWORD32 uc_i;

        parse_part_params_t * ps_part = ps_dec->ps_part;

        UWORD8 u1_sub_mb_mode, u1_num_subpart, u1_mb_part_width, u1_mb_part_height;

        UWORD32 u4_sub_mb_num;

        const UWORD8 * pu1_top_left_sub_mb_indx;

        mv_pred_t *ps_mv_start = ps_dec->ps_mv_cur + (u4_mb_num << 4);

        UWORD16 u2_sub_mb_num_pack = 0x028A;

        /* Loading the table pointers */

        const UWORD8 * pu1_mb_partw = (const UWORD8 *)gau1_ih264d_mb_partw;

        const UWORD8 * pu1_mb_parth = (const UWORD8 *)gau1_ih264d_mb_parth;

        const UWORD8 * pu1_sub_mb_indx_mod =

                        (const UWORD8 *)(gau1_ih264d_submb_indx_mod)

                                        + (uc_sub_mb * 6);

        const UWORD8 * pu1_sub_mb_partw = (const UWORD8 *)gau1_ih264d_submb_partw;

        const UWORD8 * pu1_sub_mb_parth = (const UWORD8 *)gau1_ih264d_submb_parth;

        const UWORD8 * pu1_num_sub_mb_part =

                        (const UWORD8 *)gau1_ih264d_num_submb_part;

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

        /* default initialisations for condition (uc_sub_mb == 0) */

        /* i.e. all are subpartitions of 8x8                     */

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

        u1_sub_mb_mode = 0;

        u1_num_subpart = 1;

        u1_mb_part_width = pu1_mb_partw[u1_mb_type];

        u1_mb_part_height = pu1_mb_parth[u1_mb_type];

        pu1_top_left_sub_mb_indx = pu1_sub_mb_indx_mod + (u1_mb_type << 1);

        u4_sub_mb_num = 0;

        /* Loop on number of partitions */

        for(uc_i = 0, u1_p_idx = 0; uc_i < u1_num_mb_part; uc_i++)

        {

            UWORD8 uc_j;

            if(uc_sub_mb)

            {

                u1_sub_mb_mode = u4_sub_mb_pack >> 24;

                u1_num_subpart = pu1_num_sub_mb_part[u1_sub_mb_mode];

                u1_mb_part_width = pu1_sub_mb_partw[u1_sub_mb_mode];

                u1_mb_part_height = pu1_sub_mb_parth[u1_sub_mb_mode];

                pu1_top_left_sub_mb_indx = pu1_sub_mb_indx_mod + (u1_sub_mb_mode << 1);

                u4_sub_mb_num = u2_sub_mb_num_pack >> 12;

                u4_sub_mb_pack <<= 8;

                u2_sub_mb_num_pack <<= 4;

            }

            /* Loop on Number of sub-partitions */

            for(uc_j = 0; uc_j < u1_num_subpart; uc_j++, pu1_top_left_sub_mb_indx++)

            {

                mv_pred_t * ps_mv;

                u4_sub_mb_num += *pu1_top_left_sub_mb_indx;

                ps_mv = ps_mv_start + u4_sub_mb_num;

                /* Storing Info for partitions */

                ps_part->u1_is_direct = PART_NOT_DIRECT;

                ps_part->u1_sub_mb_num = u4_sub_mb_num;

                ps_part->u1_partheight = u1_mb_part_height;

                ps_part->u1_partwidth = u1_mb_part_width;

                /* Increment partition Index */

                u1_p_idx++;

                ps_part++;

                ih264d_get_mvd_cabac(u4_sub_mb_num, 0, u1_mb_part_width,

                                     u1_mb_part_height, 1, ps_dec, ps_mv);

            }

        }

        ps_parse_mb_data->u1_num_part = u1_p_idx;

        ps_dec->ps_part = ps_part;

    }

    {

        UWORD8 u1_cbp;

        /* Read the Coded block pattern */

        u1_cbp = (WORD8)ih264d_parse_ctx_cbp_cabac(ps_dec);

        COPYTHECONTEXT("coded_block_pattern", u1_cbp);

        ps_cur_mb_info->u1_cbp = u1_cbp;

        p_curr_ctxt->u1_cbp = u1_cbp;

        p_curr_ctxt->u1_intra_chroma_pred_mode = 0;

        p_curr_ctxt->u1_yuv_dc_csbp &= 0xFE;

        ps_dec->pu1_left_yuv_dc_csbp[0] &= 0x6;

        if(u1_cbp > 47)

            return ERROR_CBP;

        ps_cur_mb_info->u1_tran_form8x8 = 0;

        ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;

        /* Read the transform8x8 u4_flag if present */

        if((ps_dec->s_high_profile.u1_transform8x8_present) && (u1_cbp & 0xf)

                        && u1_no_submb_part_size_lt8x8_flag)

        {

            ps_cur_mb_info->u1_tran_form8x8 = ih264d_parse_transform8x8flag_cabac(

                            ps_dec, ps_cur_mb_info);

            COPYTHECONTEXT("transform_size_8x8_flag", ps_cur_mb_info->u1_tran_form8x8);

            p_curr_ctxt->u1_transform8x8_ctxt = ps_cur_mb_info->u1_tran_form8x8;

            ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = ps_cur_mb_info->u1_tran_form8x8;

        }

        else

        {

            p_curr_ctxt->u1_transform8x8_ctxt = 0;

        }

        /* Read mb_qp_delta */

        if(u1_cbp)

        {

            WORD8 c_temp;

            ret = ih264d_parse_mb_qp_delta_cabac(ps_dec, &c_temp);

            if(ret != OK)

                return ret;

            COPYTHECONTEXT("mb_qp_delta", c_temp);

            if(c_temp != 0)

            {

                ret = ih264d_update_qp(ps_dec, c_temp);

                if(ret != OK)

                    return ret;

            }

        }

        else

            ps_dec->i1_prev_mb_qp_delta = 0;

        ih264d_parse_residual4x4_cabac(ps_dec, ps_cur_mb_info, 0);

        if(EXCEED_OFFSET(ps_dec->ps_bitstrm))

            return ERROR_EOB_TERMINATE_T;

    }

    return OK;

}

/*!

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

 * \if Function name : parsePSliceData \endif

 *

 * \brief

 *    This function parses CAVLC syntax of N MB's of a P slice.

 *    1. After parsing syntax of N MB's, for those N MB's (less than N, incase

 *       of end of slice or end of row), MB is decoded. This process is carried

 *       for one complete MB row or till end of slice.

 *    2. Bottom one row of current MB is copied to IntraPredLine buffers.

 *       IntraPredLine buffers are used for Intra prediction of next row.

 *    3. Current MB row along with previous 4 rows of Luma (and 2 of Chroma) are

 *       deblocked.

 *    4. 4 rows (2 for Chroma) previous row and 12 rows (6 for Chroma) are

 *       DMA'ed to picture buffers.

 *

 * \return

 *    0 on Success and Error code otherwise

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

 */

/*!

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

 * \if Function name : ih264d_update_nnz_for_skipmb \endif

 *

 * \brief

 *

 * \return

 *    None

 *

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

 */

void ih264d_update_nnz_for_skipmb(dec_struct_t * ps_dec,

                                  dec_mb_info_t * ps_cur_mb_info,

                                  UWORD8 u1_entrpy)

{

    UWORD32 *pu4_buf;

    UWORD8 *pu1_buf;

    UNUSED(u1_entrpy);

    pu1_buf = ps_dec->pu1_left_nnz_y;

    pu4_buf = (UWORD32 *)pu1_buf;

    *pu4_buf = 0;

    pu1_buf = ps_dec->pu1_left_nnz_uv;

    pu4_buf = (UWORD32 *)pu1_buf;

    *pu4_buf = 0;

    pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_y;

    pu4_buf = (UWORD32 *)pu1_buf;

    *pu4_buf = 0;

    pu1_buf = ps_cur_mb_info->ps_curmb->pu1_nnz_uv;

    pu4_buf = (UWORD32 *)pu1_buf;

    *pu4_buf = 0;

    ps_cur_mb_info->ps_curmb->u2_luma_csbp = 0;

    ps_cur_mb_info->u2_luma_csbp = 0;

    ps_cur_mb_info->u2_chroma_csbp = 0;

}

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

/*                                                                           */

/*  Function Name : ih264d_parse_inter_slice_data_cabac                             */

/*                                                                           */

/*  Description   : This function parses cabac syntax of a inter slice on    */

/*                  N MB basis.                                              */

/*                                                                           */

/*  Inputs        : ps_dec                                                   */

/*                  sliceparams                                              */

/*                  firstMbInSlice                                           */

/*                                                                           */

/*  Processing    : 1. After parsing syntax for N MBs those N MBs are        */

/*                     decoded till the end of slice.                        */

/*                  2. MV prediction and DMA happens on a N/2 MB basis.      */

/*                                                                           */

/*  Returns       : 0                                                        */

/*                                                                           */

/*  Issues        : <List any issues or problems with this function>         */

/*                                                                           */

/*  Revision History:                                                        */

/*                                                                           */

/*         DD MM YYYY   Author(s)       Changes (Describe the changes made)  */

/*         13 07 2002   Jay             Draft                                */

/*                                                                           */

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

WORD32 ih264d_parse_inter_slice_data_cabac(dec_struct_t * ps_dec,

                                           dec_slice_params_t * ps_slice,

                                           UWORD16 u2_first_mb_in_slice)

{

    UWORD32 uc_more_data_flag;

    WORD32 i2_cur_mb_addr;

    UWORD32 u1_num_mbs, u1_num_mbsNby2, u1_mb_idx;

    UWORD32 u1_mbaff;

    UWORD32 u1_num_mbs_next, u1_end_of_row;

    const UWORD16 i2_pic_wdin_mbs = ps_dec->u2_frm_wd_in_mbs;

    UWORD32 u1_slice_end = 0;

    UWORD32 u1_tfr_n_mb = 0;

    UWORD32 u1_decode_nmb = 0;

    deblk_mb_t *ps_cur_deblk_mb;

    dec_mb_info_t *ps_cur_mb_info;

    parse_pmbarams_t *ps_parse_mb_data = ps_dec->ps_parse_mb_data;

    UWORD32 u1_inter_mb_skip_type;

    UWORD32 u1_inter_mb_type;

    UWORD32 u1_deblk_mb_type;

    UWORD32 u1_mb_threshold;

    dec_bit_stream_t * const ps_bitstrm = ps_dec->ps_bitstrm;

    WORD32 ret = OK;

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

    /* Initialisations specific to B or P slice           */

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

    if(ps_slice->u1_slice_type == P_SLICE)

    {

        u1_inter_mb_skip_type = CAB_P_SKIP;

        u1_inter_mb_type = P_MB;

        u1_deblk_mb_type = D_INTER_MB;

        u1_mb_threshold = 5;

    }

    else // B_SLICE

    {

        u1_inter_mb_skip_type = CAB_B_SKIP;

        u1_inter_mb_type = B_MB;

        u1_deblk_mb_type = D_B_SLICE;

        u1_mb_threshold = 23;

    }

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

    /* Slice Level Initialisations                        */

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

    i2_cur_mb_addr = u2_first_mb_in_slice;

    ps_dec->u1_qp = ps_slice->u1_slice_qp;

    ih264d_update_qp(ps_dec, 0);

    u1_mb_idx = ps_dec->u4_mb_idx;

    u1_num_mbs = u1_mb_idx;

    u1_num_mbsNby2 = 0;

    u1_mbaff = ps_slice->u1_mbaff_frame_flag;

    i2_cur_mb_addr = u2_first_mb_in_slice << u1_mbaff;

    uc_more_data_flag = 1;

    /* Initialisations specific to cabac */

    if(ps_bitstrm->u4_ofst & 0x07)

    {

        ps_bitstrm->u4_ofst += 8;

        ps_bitstrm->u4_ofst &= 0xFFFFFFF8;

    }

    ret = ih264d_init_cabac_dec_envirnoment(&(ps_dec->s_cab_dec_env), ps_bitstrm);

    if(ret != OK)

        return ret;

    ps_dec->i1_prev_mb_qp_delta = 0;

    while(!u1_slice_end)

    {

        UWORD8 u1_mb_type;

        UWORD32 u4_mb_skip;

        ps_dec->pv_prev_mb_parse_tu_coeff_data = ps_dec->pv_parse_tu_coeff_data;

        if(i2_cur_mb_addr > ps_dec->ps_cur_sps->u4_max_mb_addr)

        {

            break;

        }

        ps_cur_mb_info = ps_dec->ps_nmb_info + u1_num_mbs;

        ps_dec->u4_num_mbs_cur_nmb = u1_num_mbs;

        ps_cur_mb_info->u1_Mux = 0;

        ps_dec->u4_num_pmbair = (u1_num_mbs >> u1_mbaff);

        ps_cur_deblk_mb = ps_dec->ps_deblk_mbn + u1_num_mbs;

        ps_cur_mb_info->u1_end_of_slice = 0;

        /* Storing Default partition info */

        ps_parse_mb_data->u1_num_part = 1;

        ps_parse_mb_data->u4_isI_mb = 0;

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

        /* Get the required information for decoding of MB             */

        /* mb_x, mb_y , neighbour availablity,                         */

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

        u4_mb_skip = ps_dec->pf_get_mb_info(ps_dec, i2_cur_mb_addr, ps_cur_mb_info, 1);

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

        /* initialize u1_tran_form8x8 to zero to aviod uninitialized accesses */

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

        ps_cur_mb_info->u1_tran_form8x8 = 0;

        ps_cur_mb_info->ps_curmb->u1_tran_form8x8 = 0;

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

        /* Set the deblocking parameters for this MB                   */

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

        if(ps_dec->u4_app_disable_deblk_frm == 0)

            ih264d_set_deblocking_parameters(ps_cur_deblk_mb, ps_slice,

                                             ps_dec->u1_mb_ngbr_availablity,

                                             ps_dec->u1_cur_mb_fld_dec_flag);

        if(u4_mb_skip)

        {

            /* Set appropriate flags in ps_cur_mb_info and ps_dec */

            memset(ps_dec->ps_curr_ctxt_mb_info, 0, sizeof(ctxt_inc_mb_info_t));

            ps_dec->ps_curr_ctxt_mb_info->u1_mb_type = u1_inter_mb_skip_type;

            MEMSET_16BYTES(&ps_dec->pu1_left_mv_ctxt_inc[0][0], 0);

            *((UWORD32 *)ps_dec->pi1_left_ref_idx_ctxt_inc) = 0;

            *(ps_dec->pu1_left_yuv_dc_csbp) = 0;

            ps_dec->i1_prev_mb_qp_delta = 0;

            ps_cur_mb_info->u1_mb_type = MB_SKIP;

            ps_cur_mb_info->u1_cbp = 0;

            {

                /* Storing Skip partition info */

                parse_part_params_t *ps_part_info = ps_dec->ps_part;

                ps_part_info->u1_is_direct = PART_DIRECT_16x16;

                ps_part_info->u1_sub_mb_num = 0;

                ps_dec->ps_part++;

            }

            /* Update Nnzs */

            ih264d_update_nnz_for_skipmb(ps_dec, ps_cur_mb_info, CABAC);

            ps_cur_mb_info->ps_curmb->u1_mb_type = u1_inter_mb_type;

            ps_cur_deblk_mb->u1_mb_type |= u1_deblk_mb_type;

            ps_cur_deblk_mb->u1_mb_qp = ps_dec->u1_qp;

        }

        else

        {

            /* Macroblock Layer Begins */

            /* Decode the u1_mb_type */

            u1_mb_type = ih264d_parse_mb_type_cabac(ps_dec);

            ps_cur_mb_info->u1_mb_type = u1_mb_type;

            if(u1_mb_type > (25 + u1_mb_threshold))

                return ERROR_MB_TYPE;

            /* Parse Macroblock Data */

            if(u1_mb_type < u1_mb_threshold)

            {

                ps_cur_mb_info->ps_curmb->u1_mb_type = u1_inter_mb_type;

                *(ps_dec->pu1_left_yuv_dc_csbp) &= 0x6;

                ret = ps_dec->pf_parse_inter_mb(ps_dec, ps_cur_mb_info, u1_num_mbs,

                                          u1_num_mbsNby2);

                if(ret != OK)

                    return ret;

                ps_cur_deblk_mb->u1_mb_qp = ps_dec->u1_qp;

                ps_cur_deblk_mb->u1_mb_type |= u1_deblk_mb_type;

            }

            else

            {

                /* Storing Intra partition info */

                ps_parse_mb_data->u1_num_part = 0;

                ps_parse_mb_data->u4_isI_mb = 1;

                if((25 + u1_mb_threshold) == u1_mb_type)

                {

                    /* I_PCM_MB */

                    ps_cur_mb_info->ps_curmb->u1_mb_type = I_PCM_MB;

                    ret = ih264d_parse_ipcm_mb(ps_dec, ps_cur_mb_info, u1_num_mbs);

                    if(ret != OK)

                        return ret;

                    ps_cur_deblk_mb->u1_mb_qp = 0;

                }

                else

                {

                    if(u1_mb_type == u1_mb_threshold)

                        ps_cur_mb_info->ps_curmb->u1_mb_type = I_4x4_MB;

                    else

                        ps_cur_mb_info->ps_curmb->u1_mb_type = I_16x16_MB;

                    ret = ih264d_parse_imb_cabac(

                                    ps_dec, ps_cur_mb_info,

                                    (UWORD8)(u1_mb_type - u1_mb_threshold));

                    if(ret != OK)

                        return ret;

                    ps_cur_deblk_mb->u1_mb_qp = ps_dec->u1_qp;

                }

                ps_cur_deblk_mb->u1_mb_type |= D_INTRA_MB;

            }

        }

        if(ps_dec->u1_enable_mb_info)

        {

            ih264d_populate_mb_info_map(ps_dec, ps_cur_mb_info, ps_cur_mb_info->u2_mbx << 1,

                                        ps_cur_mb_info->u2_mby << 1, ps_cur_deblk_mb->u1_mb_qp);

        }

        if(u1_mbaff)

        {

            ih264d_update_mbaff_left_nnz(ps_dec, ps_cur_mb_info);

        }

        if(ps_cur_mb_info->u1_topmb && u1_mbaff)

            uc_more_data_flag = 1;

        else

        {

            uc_more_data_flag = ih264d_decode_terminate(&ps_dec->s_cab_dec_env,

                                                      ps_bitstrm);

            uc_more_data_flag = !uc_more_data_flag;

            COPYTHECONTEXT("Decode Sliceterm",!uc_more_data_flag);

        }

        if(u1_mbaff)

        {

            if(!uc_more_data_flag && (0 == (i2_cur_mb_addr & 1)))

            {

                return ERROR_EOB_FLUSHBITS_T;

            }

        }

        /* Next macroblock information */

        i2_cur_mb_addr++;

        u1_num_mbs++;

        u1_num_mbsNby2++;

        ps_parse_mb_data++;

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

        /* Check for End Of Row and other flags that determine when to  */

        /* do DMA setup for N/2-Mb, Decode for N-Mb, and Transfer for   */