/src/libavc/decoder/svc/isvcd_mb_utils.c

Source
/******************************************************************************
 *
 * Copyright (C) 2022 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
 *  isvcd_mb_utils.c
 *
 * @brief
 *  Contains utitlity functions needed for Macroblock decoding
 *
 * @author
 *  Kishore
 *
 * @par List of Functions:
 *  - isvcd_get_mb_info_cabac_nonmbaff()
 *
 * @remarks
 *  None
 *
 *******************************************************************************
 */

#include <string.h>
#include <stdlib.h>
#include "ih264d_bitstrm.h"
#include "ih264d_defs.h"
#include "ih264d_debug.h"
#include "isvcd_structs.h"
#include "ih264d_defs.h"
#include "ih264d_mb_utils.h"
#include "ih264d_parse_slice.h"
#include "ih264d_error_handler.h"
#include "ih264d_parse_mb_header.h"
#include "ih264d_cabac.h"
#include "ih264d_defs.h"
#include "ih264d_tables.h"

/*****************************************************************************/
/*                                                                           */
/*  Function Name : get_mb_info_cabac                                        */
/*                                                                           */
/*  Description   : This function sets the following information of cur MB   */
/*                  (a) mb_x and mb_y                                        */
/*                  (b) Neighbour availablity                                */
/*                  (c) Macroblock location in the frame buffer              */
/*                  (e) leftMb parama and TopMb params of curMB              */
/*                  (f) For Mbaff case leftMb params and TopMb params of     */
/*                      bottomMb are also set if curMB is top                */
/*                  (g) For mbaff predicts field/frame u4_flag for topMb     */
/*                      and sets the field/frame for botMb. This is          */
/*                      written in ps_dec->u1_cur_mb_fld_dec_flag            */
/*                                                                           */
/*  Inputs        : pointer to decstruct                                     */
/*                  pointer to current mb info                               */
/*                  currentMbaddress                                         */
/*                                                                           */
/*  Processing    : leftMb and TopMb params are used by DecMbskip and        */
/*                  DecCtxMbfield  modules so that these modules do not      */
/*                  check for neigbour availability and then find the        */
/*                  neigbours for context increments                         */
/*                                                                           */
/*  Returns       : OK                                                       */
/*                                                                           */
/*  Issues        : <List any issues or problems with this function>         */
/*                                                                           */
/*  Revision History:                                                        */
/*                                                                           */
/*         DD MM YYYY   Author(s)       Changes (Describe the changes made)  */
/*         06 09 2021   Kishore         Draft                                */
/*                                                                           */
/*****************************************************************************/
UWORD32 isvcd_get_mb_info_cabac_nonmbaff(dec_struct_t *ps_dec, const UWORD16 u2_cur_mb_address,
                                         dec_mb_info_t *ps_cur_mb_info, UWORD32 u4_mbskip)
{
    WORD32 mb_x;
    WORD32 mb_y;
    UWORD32 u1_mb_ngbr_avail = 0;
    UWORD32 u2_frm_width_in_mb = ps_dec->u2_frm_wd_in_mbs;
    UWORD32 u1_top_mb = 1;
    WORD32 i2_prev_slice_mbx = ps_dec->i2_prev_slice_mbx;
    UWORD32 u2_top_right_mask = TOP_RIGHT_DEFAULT_AVAILABLE;
    UWORD32 u2_top_left_mask = TOP_LEFT_DEFAULT_AVAILABLE;
    ctxt_inc_mb_info_t *const p_ctx_inc_mb_map = ps_dec->p_ctxt_inc_mb_map;

    /*--------------------------------------------------------------------*/
    /* Calculate values of mb_x and mb_y                                  */
    /*--------------------------------------------------------------------*/
    mb_x = (WORD16) ps_dec->u2_mbx;
    mb_y = (WORD16) ps_dec->u2_mby;
    ps_dec->u4_cur_mb_addr = u2_cur_mb_address;

    mb_x++;
    if((UWORD32) mb_x == u2_frm_width_in_mb)
    {
        mb_x = 0;
        mb_y++;
        if(mb_y >= ps_dec->u2_frm_ht_in_mbs)
        {
            mb_y = ps_dec->u2_frm_ht_in_mbs - 1;
        }
    }
    /*********************************************************************/
    /* Cabac Context Initialisations                                     */
    /*********************************************************************/
    ps_dec->ps_curr_ctxt_mb_info = p_ctx_inc_mb_map + mb_x;
    ps_dec->p_left_ctxt_mb_info = p_ctx_inc_mb_map - 1;
    ps_dec->p_top_ctxt_mb_info = p_ctx_inc_mb_map - 1;

    /********************************************************************/
    /* neighbour availablility                                          */
    /********************************************************************/
    if(mb_y > ps_dec->i2_prev_slice_mby)
    {
        /* if not in the immemdiate row of prev slice end then top will be available */
        if(mb_y > (ps_dec->i2_prev_slice_mby + 1)) i2_prev_slice_mbx = -1;

        if(mb_x > i2_prev_slice_mbx)
        {
            u1_mb_ngbr_avail |= TOP_MB_AVAILABLE_MASK;
            u2_top_right_mask |= TOP_RIGHT_TOP_AVAILABLE;
            u2_top_left_mask |= TOP_LEFT_TOP_AVAILABLE;
            ps_dec->p_top_ctxt_mb_info = ps_dec->ps_curr_ctxt_mb_info;
        }
        if((mb_x > (i2_prev_slice_mbx - 1)) && ((UWORD32) mb_x != (u2_frm_width_in_mb - 1)))
        {
            u1_mb_ngbr_avail |= TOP_RIGHT_MB_AVAILABLE_MASK;
            u2_top_right_mask |= TOP_RIGHT_TOPR_AVAILABLE;
        }

        if(mb_x > (i2_prev_slice_mbx + 1))
        {
            u1_mb_ngbr_avail |= TOP_LEFT_MB_AVAILABLE_MASK;
            u2_top_left_mask |= TOP_LEFT_TOPL_AVAILABLE;
        }
        /* Next row */
        i2_prev_slice_mbx = -1;
    }
    /* Same row */
    if(mb_x > (i2_prev_slice_mbx + 1))
    {
        u1_mb_ngbr_avail |= LEFT_MB_AVAILABLE_MASK;
        u2_top_left_mask |= TOP_LEFT_LEFT_AVAILABLE;
        ps_dec->p_left_ctxt_mb_info = ps_dec->ps_curr_ctxt_mb_info - 1;
    }
    {
        mb_neigbour_params_t *ps_cur_mb_row = ps_dec->ps_cur_mb_row;
        mb_neigbour_params_t *ps_top_mb_row = ps_dec->ps_top_mb_row;
        /* copy the parameters of topleft Mb */
        ps_cur_mb_info->u1_topleft_mbtype = ps_dec->u1_topleft_mbtype;
        /* Neighbour pointer assignments*/
        ps_cur_mb_info->ps_curmb = ps_cur_mb_row + mb_x;
        ps_cur_mb_info->ps_left_mb = ps_cur_mb_row + mb_x - 1;
        ps_cur_mb_info->ps_top_mb = ps_top_mb_row + mb_x;
        ps_cur_mb_info->ps_top_right_mb = ps_top_mb_row + mb_x + 1;

        /* Update the parameters of topleftmb*/
        ps_dec->u1_topleft_mbtype = ps_cur_mb_info->ps_top_mb->u1_mb_type;
    }

    ps_dec->u2_mby = mb_y;
    ps_dec->u2_mbx = mb_x;
    ps_cur_mb_info->u2_mbx = mb_x;
    ps_cur_mb_info->u2_mby = mb_y;
    ps_cur_mb_info->u1_topmb = u1_top_mb;
    ps_dec->i4_submb_ofst += SUB_BLK_SIZE;
    ps_dec->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
    ps_cur_mb_info->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
    ps_cur_mb_info->ps_curmb->u1_mb_fld = ps_dec->u1_cur_mb_fld_dec_flag;
    ps_cur_mb_info->u1_mb_field_decodingflag = ps_dec->u1_cur_mb_fld_dec_flag;
    ps_cur_mb_info->u2_top_left_avail_mask = u2_top_left_mask;
    ps_cur_mb_info->u2_top_right_avail_mask = u2_top_right_mask;

    /*********************************************************************/
    /*                  Assign the neigbours                             */
    /*********************************************************************/
    if(u4_mbskip)
    {
        UWORD8 u1_a, u1_b;
        UWORD32 u4_ctx_inc;

        u1_a = (ps_dec->p_top_ctxt_mb_info->u1_mb_type != CAB_INFERRED)
                   ? (!!(ps_dec->p_top_ctxt_mb_info->u1_mb_type & CAB_SKIP_MASK))
                   : 0;
        u1_b = (ps_dec->p_left_ctxt_mb_info->u1_mb_type != CAB_INFERRED)
                   ? (!!(ps_dec->p_left_ctxt_mb_info->u1_mb_type & CAB_SKIP_MASK))
                   : 0;
        u4_ctx_inc = 2 - (u1_a + u1_b);

        u4_mbskip = ih264d_decode_bin(u4_ctx_inc, ps_dec->p_mb_skip_flag_t, ps_dec->ps_bitstrm,
                                      &ps_dec->s_cab_dec_env);

        if(!u4_mbskip)
        {
            if(!(u1_mb_ngbr_avail & LEFT_MB_AVAILABLE_MASK))
            {
                UWORD32 *pu4_buf;
                UWORD8 *pu1_buf;

                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;

                *(ps_dec->pu1_left_yuv_dc_csbp) = 0;
                MEMSET_16BYTES(&ps_dec->pu1_left_mv_ctxt_inc[0][0], 0);
                *(UWORD32 *) ps_dec->pi1_left_ref_idx_ctxt_inc = 0;
            }
            if(!(u1_mb_ngbr_avail & TOP_MB_AVAILABLE_MASK))
            {
                MEMSET_16BYTES(ps_dec->ps_curr_ctxt_mb_info->u1_mv, 0);
                memset(ps_dec->ps_curr_ctxt_mb_info->i1_ref_idx, 0, 4);
            }
        }
    }
    return (u4_mbskip);
}

/*****************************************************************************/
/*                                                                           */
/*  Function Name : isvcd_get_mb_info_cavlc_nonmbaff                         */
/*                                                                           */
/*  Description   : This function sets the following information of cur MB   */
/*                  (a) mb_x and mb_y                                        */
/*                  (b) Neighbour availablity                                */
/*                  (c) Macroblock location in the frame buffer              */
/*                  (e) For mbaff predicts field/frame u4_flag for topMb     */
/*                      and sets the field/frame for botMb. This is          */
/*                      written in ps_dec->u1_cur_mb_fld_dec_flag            */
/*                                                                           */
/*  Inputs        : pointer to decstruct                                     */
/*                  pointer to current mb info                               */
/*                  currentMbaddress                                         */
/*                                                                           */
/*  Processing    : leftMb and TopMb params are used by DecMbskip and        */
/*                  DecCtxMbfield  modules so that these modules do not      */
/*                  check for neigbour availability and then find the        */
/*                  neigbours for context increments                         */
/*                                                                           */
/*  Returns       : OK                                                       */
/*                                                                           */
/*  Issues        : <List any issues or problems with this function>         */
/*                                                                           */
/*  Revision History:                                                        */
/*                                                                           */
/*         DD MM YYYY   Author(s)       Changes (Describe the changes made)  */
/*         24 01 2023   Kishore             Draft                            */
/*                                                                           */
/*****************************************************************************/

UWORD32 isvcd_get_mb_info_cavlc_nonmbaff(dec_struct_t *ps_dec, const UWORD16 u2_cur_mb_address,
                                         dec_mb_info_t *ps_cur_mb_info, UWORD32 u4_mbskip_run)
{
    WORD32 mb_x;
    WORD32 mb_y;
    UWORD8 u1_mb_ngbr_avail = 0;
    UWORD16 u2_frm_width_in_mb = ps_dec->u2_frm_wd_in_mbs;
    WORD16 i2_prev_slice_mbx = ps_dec->i2_prev_slice_mbx;
    UWORD16 u2_top_right_mask = TOP_RIGHT_DEFAULT_AVAILABLE;
    UWORD16 u2_top_left_mask = TOP_LEFT_DEFAULT_AVAILABLE;
    UNUSED(u4_mbskip_run);
    /*--------------------------------------------------------------------*/
    /* Calculate values of mb_x and mb_y                                  */
    /*--------------------------------------------------------------------*/
    mb_x = (WORD16) ps_dec->u2_mbx;
    mb_y = (WORD16) ps_dec->u2_mby;

    ps_dec->u4_cur_mb_addr = u2_cur_mb_address;

    mb_x++;

    if(mb_x == u2_frm_width_in_mb)
    {
        mb_x = 0;
        mb_y++;
        if(mb_y >= ps_dec->u2_frm_ht_in_mbs)
        {
            mb_y = ps_dec->u2_frm_ht_in_mbs - 1;
        }
    }
    if(mb_y > ps_dec->i2_prev_slice_mby)
    {
        /* if not in the immemdiate row of prev slice end then top
         will be available */
        if(mb_y > (ps_dec->i2_prev_slice_mby + 1)) i2_prev_slice_mbx = -1;

        if(mb_x > i2_prev_slice_mbx)
        {
            u1_mb_ngbr_avail |= TOP_MB_AVAILABLE_MASK;
            u2_top_right_mask |= TOP_RIGHT_TOP_AVAILABLE;
            u2_top_left_mask |= TOP_LEFT_TOP_AVAILABLE;
        }

        if((mb_x > (i2_prev_slice_mbx - 1)) && (mb_x != (u2_frm_width_in_mb - 1)))
        {
            u1_mb_ngbr_avail |= TOP_RIGHT_MB_AVAILABLE_MASK;
            u2_top_right_mask |= TOP_RIGHT_TOPR_AVAILABLE;
        }

        if(mb_x > (i2_prev_slice_mbx + 1))
        {
            u1_mb_ngbr_avail |= TOP_LEFT_MB_AVAILABLE_MASK;
            u2_top_left_mask |= TOP_LEFT_TOPL_AVAILABLE;
        }

        /* Next row  Left will be available*/
        i2_prev_slice_mbx = -1;
    }

    /* Same row */
    if(mb_x > (i2_prev_slice_mbx + 1))
    {
        u1_mb_ngbr_avail |= LEFT_MB_AVAILABLE_MASK;
        u2_top_left_mask |= TOP_LEFT_LEFT_AVAILABLE;
    }

    {
        mb_neigbour_params_t *ps_cur_mb_row = ps_dec->ps_cur_mb_row;
        mb_neigbour_params_t *ps_top_mb_row = ps_dec->ps_top_mb_row;

        /* copy the parameters of topleft Mb */
        ps_cur_mb_info->u1_topleft_mbtype = ps_dec->u1_topleft_mbtype;
        /* Neighbour pointer assignments*/
        ps_cur_mb_info->ps_curmb = ps_cur_mb_row + mb_x;
        ps_cur_mb_info->ps_left_mb = ps_cur_mb_row + mb_x - 1;
        ps_cur_mb_info->ps_top_mb = ps_top_mb_row + mb_x;
        ps_cur_mb_info->ps_top_right_mb = ps_top_mb_row + mb_x + 1;

        /* Update the parameters of topleftmb*/
        ps_dec->u1_topleft_mbtype = ps_cur_mb_info->ps_top_mb->u1_mb_type;
    }

    ps_dec->u2_mby = mb_y;
    ps_dec->u2_mbx = mb_x;
    ps_cur_mb_info->u2_mbx = mb_x;
    ps_cur_mb_info->u2_mby = mb_y;
    ps_cur_mb_info->u1_topmb = 1;
    ps_dec->i4_submb_ofst += SUB_BLK_SIZE;
    ps_dec->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
    ps_cur_mb_info->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
    ps_cur_mb_info->ps_curmb->u1_mb_fld = ps_dec->u1_cur_mb_fld_dec_flag;
    ps_cur_mb_info->u1_mb_field_decodingflag = ps_dec->u1_cur_mb_fld_dec_flag;
    ps_cur_mb_info->u2_top_left_avail_mask = u2_top_left_mask;
    ps_cur_mb_info->u2_top_right_avail_mask = u2_top_right_mask;
    return (OK);
}

Coverage Report

Created: 2026-08-13 07:21

Line	Count	Source
1		/******************************************************************************
2		*
3		* Copyright (C) 2022 The Android Open Source Project
4		*
5		* Licensed under the Apache License, Version 2.0 (the "License");
6		* you may not use this file except in compliance with the License.
7		* You may obtain a copy of the License at:
8		*
9		* http://www.apache.org/licenses/LICENSE-2.0
10		*
11		* Unless required by applicable law or agreed to in writing, software
12		* distributed under the License is distributed on an "AS IS" BASIS,
13		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14		* See the License for the specific language governing permissions and
15		* limitations under the License.
16		*
17		*****************************************************************************
18		* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19		*/
20		/**
21		*******************************************************************************
22		* @file
23		* isvcd_mb_utils.c
24		*
25		* @brief
26		* Contains utitlity functions needed for Macroblock decoding
27		*
28		* @author
29		* Kishore
30		*
31		* @par List of Functions:
32		* - isvcd_get_mb_info_cabac_nonmbaff()
33		*
34		* @remarks
35		* None
36		*
37		*******************************************************************************
38		*/
39
40		#include <string.h>
41		#include <stdlib.h>
42		#include "ih264d_bitstrm.h"
43		#include "ih264d_defs.h"
44		#include "ih264d_debug.h"
45		#include "isvcd_structs.h"
46		#include "ih264d_defs.h"
47		#include "ih264d_mb_utils.h"
48		#include "ih264d_parse_slice.h"
49		#include "ih264d_error_handler.h"
50		#include "ih264d_parse_mb_header.h"
51		#include "ih264d_cabac.h"
52		#include "ih264d_defs.h"
53		#include "ih264d_tables.h"
54
55		/*****************************************************************************/
56		/* */
57		/* Function Name : get_mb_info_cabac */
58		/* */
59		/* Description : This function sets the following information of cur MB */
60		/* (a) mb_x and mb_y */
61		/* (b) Neighbour availablity */
62		/* (c) Macroblock location in the frame buffer */
63		/* (e) leftMb parama and TopMb params of curMB */
64		/* (f) For Mbaff case leftMb params and TopMb params of */
65		/* bottomMb are also set if curMB is top */
66		/* (g) For mbaff predicts field/frame u4_flag for topMb */
67		/* and sets the field/frame for botMb. This is */
68		/* written in ps_dec->u1_cur_mb_fld_dec_flag */
69		/* */
70		/* Inputs : pointer to decstruct */
71		/* pointer to current mb info */
72		/* currentMbaddress */
73		/* */
74		/* Processing : leftMb and TopMb params are used by DecMbskip and */
75		/* DecCtxMbfield modules so that these modules do not */
76		/* check for neigbour availability and then find the */
77		/* neigbours for context increments */
78		/* */
79		/* Returns : OK */
80		/* */
81		/* Issues : <List any issues or problems with this function> */
82		/* */
83		/* Revision History: */
84		/* */
85		/* DD MM YYYY Author(s) Changes (Describe the changes made) */
86		/* 06 09 2021 Kishore Draft */
87		/* */
88		/*****************************************************************************/
89		UWORD32 isvcd_get_mb_info_cabac_nonmbaff(dec_struct_t *ps_dec, const UWORD16 u2_cur_mb_address,
90		dec_mb_info_t *ps_cur_mb_info, UWORD32 u4_mbskip)
91	1.96M	{
92	1.96M	WORD32 mb_x;
93	1.96M	WORD32 mb_y;
94	1.96M	UWORD32 u1_mb_ngbr_avail = 0;
95	1.96M	UWORD32 u2_frm_width_in_mb = ps_dec->u2_frm_wd_in_mbs;
96	1.96M	UWORD32 u1_top_mb = 1;
97	1.96M	WORD32 i2_prev_slice_mbx = ps_dec->i2_prev_slice_mbx;
98	1.96M	UWORD32 u2_top_right_mask = TOP_RIGHT_DEFAULT_AVAILABLE;
99	1.96M	UWORD32 u2_top_left_mask = TOP_LEFT_DEFAULT_AVAILABLE;
100	1.96M	ctxt_inc_mb_info_t *const p_ctx_inc_mb_map = ps_dec->p_ctxt_inc_mb_map;
101
102		/--------------------------------------------------------------------/
103		/* Calculate values of mb_x and mb_y */
104		/--------------------------------------------------------------------/
105	1.96M	mb_x = (WORD16) ps_dec->u2_mbx;
106	1.96M	mb_y = (WORD16) ps_dec->u2_mby;
107	1.96M	ps_dec->u4_cur_mb_addr = u2_cur_mb_address;
108
109	1.96M	mb_x++;
110	1.96M	if((UWORD32) mb_x == u2_frm_width_in_mb)
111	142k	{
112	142k	mb_x = 0;
113	142k	mb_y++;
114	142k	if(mb_y >= ps_dec->u2_frm_ht_in_mbs)
115	0	{
116	0	mb_y = ps_dec->u2_frm_ht_in_mbs - 1;
117	0	}
118	142k	}
119		/*********************************************************************/
120		/* Cabac Context Initialisations */
121		/*********************************************************************/
122	1.96M	ps_dec->ps_curr_ctxt_mb_info = p_ctx_inc_mb_map + mb_x;
123	1.96M	ps_dec->p_left_ctxt_mb_info = p_ctx_inc_mb_map - 1;
124	1.96M	ps_dec->p_top_ctxt_mb_info = p_ctx_inc_mb_map - 1;
125
126		/********************************************************************/
127		/* neighbour availablility */
128		/********************************************************************/
129	1.96M	if(mb_y > ps_dec->i2_prev_slice_mby)
130	1.77M	{
131		/* if not in the immemdiate row of prev slice end then top will be available */
132	1.77M	if(mb_y > (ps_dec->i2_prev_slice_mby + 1)) i2_prev_slice_mbx = -1;
133
134	1.77M	if(mb_x > i2_prev_slice_mbx)
135	1.76M	{
136	1.76M	u1_mb_ngbr_avail \|= TOP_MB_AVAILABLE_MASK;
137	1.76M	u2_top_right_mask \|= TOP_RIGHT_TOP_AVAILABLE;
138	1.76M	u2_top_left_mask \|= TOP_LEFT_TOP_AVAILABLE;
139	1.76M	ps_dec->p_top_ctxt_mb_info = ps_dec->ps_curr_ctxt_mb_info;
140	1.76M	}
141	1.77M	if((mb_x > (i2_prev_slice_mbx - 1)) && ((UWORD32) mb_x != (u2_frm_width_in_mb - 1)))
142	1.63M	{
143	1.63M	u1_mb_ngbr_avail \|= TOP_RIGHT_MB_AVAILABLE_MASK;
144	1.63M	u2_top_right_mask \|= TOP_RIGHT_TOPR_AVAILABLE;
145	1.63M	}
146
147	1.77M	if(mb_x > (i2_prev_slice_mbx + 1))
148	1.62M	{
149	1.62M	u1_mb_ngbr_avail \|= TOP_LEFT_MB_AVAILABLE_MASK;
150	1.62M	u2_top_left_mask \|= TOP_LEFT_TOPL_AVAILABLE;
151	1.62M	}
152		/* Next row */
153	1.77M	i2_prev_slice_mbx = -1;
154	1.77M	}
155		/* Same row */
156	1.96M	if(mb_x > (i2_prev_slice_mbx + 1))
157	1.79M	{
158	1.79M	u1_mb_ngbr_avail \|= LEFT_MB_AVAILABLE_MASK;
159	1.79M	u2_top_left_mask \|= TOP_LEFT_LEFT_AVAILABLE;
160	1.79M	ps_dec->p_left_ctxt_mb_info = ps_dec->ps_curr_ctxt_mb_info - 1;
161	1.79M	}
162	1.96M	{
163	1.96M	mb_neigbour_params_t *ps_cur_mb_row = ps_dec->ps_cur_mb_row;
164	1.96M	mb_neigbour_params_t *ps_top_mb_row = ps_dec->ps_top_mb_row;
165		/* copy the parameters of topleft Mb */
166	1.96M	ps_cur_mb_info->u1_topleft_mbtype = ps_dec->u1_topleft_mbtype;
167		/* Neighbour pointer assignments*/
168	1.96M	ps_cur_mb_info->ps_curmb = ps_cur_mb_row + mb_x;
169	1.96M	ps_cur_mb_info->ps_left_mb = ps_cur_mb_row + mb_x - 1;
170	1.96M	ps_cur_mb_info->ps_top_mb = ps_top_mb_row + mb_x;
171	1.96M	ps_cur_mb_info->ps_top_right_mb = ps_top_mb_row + mb_x + 1;
172
173		/* Update the parameters of topleftmb*/
174	1.96M	ps_dec->u1_topleft_mbtype = ps_cur_mb_info->ps_top_mb->u1_mb_type;
175	1.96M	}
176
177	1.96M	ps_dec->u2_mby = mb_y;
178	1.96M	ps_dec->u2_mbx = mb_x;
179	1.96M	ps_cur_mb_info->u2_mbx = mb_x;
180	1.96M	ps_cur_mb_info->u2_mby = mb_y;
181	1.96M	ps_cur_mb_info->u1_topmb = u1_top_mb;
182	1.96M	ps_dec->i4_submb_ofst += SUB_BLK_SIZE;
183	1.96M	ps_dec->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
184	1.96M	ps_cur_mb_info->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
185	1.96M	ps_cur_mb_info->ps_curmb->u1_mb_fld = ps_dec->u1_cur_mb_fld_dec_flag;
186	1.96M	ps_cur_mb_info->u1_mb_field_decodingflag = ps_dec->u1_cur_mb_fld_dec_flag;
187	1.96M	ps_cur_mb_info->u2_top_left_avail_mask = u2_top_left_mask;
188	1.96M	ps_cur_mb_info->u2_top_right_avail_mask = u2_top_right_mask;
189
190		/*********************************************************************/
191		/* Assign the neigbours */
192		/*********************************************************************/
193	1.96M	if(u4_mbskip)
194	1.85M	{
195	1.85M	UWORD8 u1_a, u1_b;
196	1.85M	UWORD32 u4_ctx_inc;
197
198	1.85M	u1_a = (ps_dec->p_top_ctxt_mb_info->u1_mb_type != CAB_INFERRED)
199	1.85M	? (!!(ps_dec->p_top_ctxt_mb_info->u1_mb_type & CAB_SKIP_MASK))
200	1.85M	: 0;
201	1.85M	u1_b = (ps_dec->p_left_ctxt_mb_info->u1_mb_type != CAB_INFERRED)
202	1.85M	? (!!(ps_dec->p_left_ctxt_mb_info->u1_mb_type & CAB_SKIP_MASK))
203	1.85M	: 0;
204	1.85M	u4_ctx_inc = 2 - (u1_a + u1_b);
205
206	1.85M	u4_mbskip = ih264d_decode_bin(u4_ctx_inc, ps_dec->p_mb_skip_flag_t, ps_dec->ps_bitstrm,
207	1.85M	&ps_dec->s_cab_dec_env);
208
209	1.85M	if(!u4_mbskip)
210	248k	{
211	248k	if(!(u1_mb_ngbr_avail & LEFT_MB_AVAILABLE_MASK))
212	59.3k	{
213	59.3k	UWORD32 *pu4_buf;
214	59.3k	UWORD8 *pu1_buf;
215
216	59.3k	pu1_buf = ps_dec->pu1_left_nnz_y;
217	59.3k	pu4_buf = (UWORD32 *) pu1_buf;
218	59.3k	*pu4_buf = 0;
219	59.3k	pu1_buf = ps_dec->pu1_left_nnz_uv;
220	59.3k	pu4_buf = (UWORD32 *) pu1_buf;
221	59.3k	*pu4_buf = 0;
222
223	59.3k	*(ps_dec->pu1_left_yuv_dc_csbp) = 0;
224	59.3k	MEMSET_16BYTES(&ps_dec->pu1_left_mv_ctxt_inc[0][0], 0);
225	59.3k	(UWORD32 ) ps_dec->pi1_left_ref_idx_ctxt_inc = 0;
226	59.3k	}
227	248k	if(!(u1_mb_ngbr_avail & TOP_MB_AVAILABLE_MASK))
228	34.3k	{
229	34.3k	MEMSET_16BYTES(ps_dec->ps_curr_ctxt_mb_info->u1_mv, 0);
230	34.3k	memset(ps_dec->ps_curr_ctxt_mb_info->i1_ref_idx, 0, 4);
231	34.3k	}
232	248k	}
233	1.85M	}
234	1.96M	return (u4_mbskip);
235	1.96M	}
236
237		/*****************************************************************************/
238		/* */
239		/* Function Name : isvcd_get_mb_info_cavlc_nonmbaff */
240		/* */
241		/* Description : This function sets the following information of cur MB */
242		/* (a) mb_x and mb_y */
243		/* (b) Neighbour availablity */
244		/* (c) Macroblock location in the frame buffer */
245		/* (e) For mbaff predicts field/frame u4_flag for topMb */
246		/* and sets the field/frame for botMb. This is */
247		/* written in ps_dec->u1_cur_mb_fld_dec_flag */
248		/* */
249		/* Inputs : pointer to decstruct */
250		/* pointer to current mb info */
251		/* currentMbaddress */
252		/* */
253		/* Processing : leftMb and TopMb params are used by DecMbskip and */
254		/* DecCtxMbfield modules so that these modules do not */
255		/* check for neigbour availability and then find the */
256		/* neigbours for context increments */
257		/* */
258		/* Returns : OK */
259		/* */
260		/* Issues : <List any issues or problems with this function> */
261		/* */
262		/* Revision History: */
263		/* */
264		/* DD MM YYYY Author(s) Changes (Describe the changes made) */
265		/* 24 01 2023 Kishore Draft */
266		/* */
267		/*****************************************************************************/
268
269		UWORD32 isvcd_get_mb_info_cavlc_nonmbaff(dec_struct_t *ps_dec, const UWORD16 u2_cur_mb_address,
270		dec_mb_info_t *ps_cur_mb_info, UWORD32 u4_mbskip_run)
271	11.6M	{
272	11.6M	WORD32 mb_x;
273	11.6M	WORD32 mb_y;
274	11.6M	UWORD8 u1_mb_ngbr_avail = 0;
275	11.6M	UWORD16 u2_frm_width_in_mb = ps_dec->u2_frm_wd_in_mbs;
276	11.6M	WORD16 i2_prev_slice_mbx = ps_dec->i2_prev_slice_mbx;
277	11.6M	UWORD16 u2_top_right_mask = TOP_RIGHT_DEFAULT_AVAILABLE;
278	11.6M	UWORD16 u2_top_left_mask = TOP_LEFT_DEFAULT_AVAILABLE;
279	11.6M	UNUSED(u4_mbskip_run);
280		/--------------------------------------------------------------------/
281		/* Calculate values of mb_x and mb_y */
282		/--------------------------------------------------------------------/
283	11.6M	mb_x = (WORD16) ps_dec->u2_mbx;
284	11.6M	mb_y = (WORD16) ps_dec->u2_mby;
285
286	11.6M	ps_dec->u4_cur_mb_addr = u2_cur_mb_address;
287
288	11.6M	mb_x++;
289
290	11.6M	if(mb_x == u2_frm_width_in_mb)
291	2.00M	{
292	2.00M	mb_x = 0;
293	2.00M	mb_y++;
294	2.00M	if(mb_y >= ps_dec->u2_frm_ht_in_mbs)
295	0	{
296	0	mb_y = ps_dec->u2_frm_ht_in_mbs - 1;
297	0	}
298	2.00M	}
299	11.6M	if(mb_y > ps_dec->i2_prev_slice_mby)
300	10.9M	{
301		/* if not in the immemdiate row of prev slice end then top
302		will be available */
303	10.9M	if(mb_y > (ps_dec->i2_prev_slice_mby + 1)) i2_prev_slice_mbx = -1;
304
305	10.9M	if(mb_x > i2_prev_slice_mbx)
306	10.8M	{
307	10.8M	u1_mb_ngbr_avail \|= TOP_MB_AVAILABLE_MASK;
308	10.8M	u2_top_right_mask \|= TOP_RIGHT_TOP_AVAILABLE;
309	10.8M	u2_top_left_mask \|= TOP_LEFT_TOP_AVAILABLE;
310	10.8M	}
311
312	10.9M	if((mb_x > (i2_prev_slice_mbx - 1)) && (mb_x != (u2_frm_width_in_mb - 1)))
313	8.93M	{
314	8.93M	u1_mb_ngbr_avail \|= TOP_RIGHT_MB_AVAILABLE_MASK;
315	8.93M	u2_top_right_mask \|= TOP_RIGHT_TOPR_AVAILABLE;
316	8.93M	}
317
318	10.9M	if(mb_x > (i2_prev_slice_mbx + 1))
319	8.88M	{
320	8.88M	u1_mb_ngbr_avail \|= TOP_LEFT_MB_AVAILABLE_MASK;
321	8.88M	u2_top_left_mask \|= TOP_LEFT_TOPL_AVAILABLE;
322	8.88M	}
323
324		/* Next row Left will be available*/
325	10.9M	i2_prev_slice_mbx = -1;
326	10.9M	}
327
328		/* Same row */
329	11.6M	if(mb_x > (i2_prev_slice_mbx + 1))
330	9.46M	{
331	9.46M	u1_mb_ngbr_avail \|= LEFT_MB_AVAILABLE_MASK;
332	9.46M	u2_top_left_mask \|= TOP_LEFT_LEFT_AVAILABLE;
333	9.46M	}
334
335	11.6M	{
336	11.6M	mb_neigbour_params_t *ps_cur_mb_row = ps_dec->ps_cur_mb_row;
337	11.6M	mb_neigbour_params_t *ps_top_mb_row = ps_dec->ps_top_mb_row;
338
339		/* copy the parameters of topleft Mb */
340	11.6M	ps_cur_mb_info->u1_topleft_mbtype = ps_dec->u1_topleft_mbtype;
341		/* Neighbour pointer assignments*/
342	11.6M	ps_cur_mb_info->ps_curmb = ps_cur_mb_row + mb_x;
343	11.6M	ps_cur_mb_info->ps_left_mb = ps_cur_mb_row + mb_x - 1;
344	11.6M	ps_cur_mb_info->ps_top_mb = ps_top_mb_row + mb_x;
345	11.6M	ps_cur_mb_info->ps_top_right_mb = ps_top_mb_row + mb_x + 1;
346
347		/* Update the parameters of topleftmb*/
348	11.6M	ps_dec->u1_topleft_mbtype = ps_cur_mb_info->ps_top_mb->u1_mb_type;
349	11.6M	}
350
351	11.6M	ps_dec->u2_mby = mb_y;
352	11.6M	ps_dec->u2_mbx = mb_x;
353	11.6M	ps_cur_mb_info->u2_mbx = mb_x;
354	11.6M	ps_cur_mb_info->u2_mby = mb_y;
355	11.6M	ps_cur_mb_info->u1_topmb = 1;
356	11.6M	ps_dec->i4_submb_ofst += SUB_BLK_SIZE;
357	11.6M	ps_dec->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
358	11.6M	ps_cur_mb_info->u1_mb_ngbr_availablity = u1_mb_ngbr_avail;
359	11.6M	ps_cur_mb_info->ps_curmb->u1_mb_fld = ps_dec->u1_cur_mb_fld_dec_flag;
360	11.6M	ps_cur_mb_info->u1_mb_field_decodingflag = ps_dec->u1_cur_mb_fld_dec_flag;
361	11.6M	ps_cur_mb_info->u2_top_left_avail_mask = u2_top_left_mask;
362	11.6M	ps_cur_mb_info->u2_top_right_avail_mask = u2_top_right_mask;
363	11.6M	return (OK);
364	11.6M	}