143 lines
4.9 KiB
C
143 lines
4.9 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/**
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*******************************************************************************
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* @file
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* isvce_cabac_structs.h
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*
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* @brief
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* This file contains cabac related structure definitions.
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*
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* @author
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* Doney Alex
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*
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* @remarks
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* none
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*
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*******************************************************************************
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*/
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#ifndef _ISVCE_CABAC_STRUCTS_H_
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#define _ISVCE_CABAC_STRUCTS_H_
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#include "ih264_typedefs.h"
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#include "isvc_cabac_tables.h"
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#include "ih264e_bitstream.h"
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#include "ih264e_cabac_structs.h"
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/**
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******************************************************************************
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* @brief MB info for cabac
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******************************************************************************
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*/
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typedef struct isvce_mb_info_ctxt_t
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{
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/* Neighbour availability Variables needed to get CtxtInc, for CABAC */
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UWORD8 u1_mb_type; /* !< macroblock type: I/P/B/SI/SP */
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UWORD8 u1_cbp; /* !< Coded Block Pattern */
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UWORD8 u1_intrapred_chroma_mode;
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/*************************************************************************/
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/* Arrangnment of AC CSBP */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: V1 V0 U1 U0 Y3 Y2 Y1 Y0 */
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/*************************************************************************/
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UWORD8 u1_yuv_ac_csbp;
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/*************************************************************************/
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/* Arrangnment of DC CSBP */
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/* bits: b7 b6 b5 b4 b3 b2 b1 b0 */
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/* CSBP: x x x x x Vdc Udc Ydc */
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/*************************************************************************/
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UWORD8 u1_yuv_dc_csbp;
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WORD8 i1_ref_idx[4];
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UWORD8 u1_mv[4][4];
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UWORD8 u1_base_mode_flag;
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} isvce_mb_info_ctxt_t;
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/**
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******************************************************************************
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* @brief CABAC Context structure : Variables to handle Cabac
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******************************************************************************
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*/
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typedef struct isvce_cabac_ctxt_t
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{
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/* Base pointer to all the cabac contexts */
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bin_ctxt_model au1_cabac_ctxt_table[NUM_SVC_CABAC_CTXTS];
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cab_csbp_t s_lft_csbp;
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/**
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* pointer to Bitstream structure
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*/
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bitstrm_t *ps_bitstrm;
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/* Pointer to mb_info_ctxt_t map_base */
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isvce_mb_info_ctxt_t *ps_mb_map_ctxt_inc_base;
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/* Pointer to encoding_envirnoment_t */
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encoding_envirnoment_t s_cab_enc_env;
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/* These things need to be updated at each MbLevel */
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/* Prev ps_mb_qp_delta_ctxt */
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WORD8 i1_prevps_mb_qp_delta_ctxt;
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/* Pointer to mb_info_ctxt_t map */
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isvce_mb_info_ctxt_t *ps_mb_map_ctxt_inc;
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/* Pointer to default mb_info_ctxt_t */
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isvce_mb_info_ctxt_t *ps_def_ctxt_mb_info;
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/* Pointer to current mb_info_ctxt_t */
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isvce_mb_info_ctxt_t *ps_curr_ctxt_mb_info;
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/* Pointer to left mb_info_ctxt_t */
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isvce_mb_info_ctxt_t *ps_left_ctxt_mb_info;
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/* Pointer to top mb_info_ctxt_t */
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isvce_mb_info_ctxt_t *ps_top_ctxt_mb_info;
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/* Poniter to left csbp structure */
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cab_csbp_t *ps_lft_csbp;
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UWORD8 *pu1_left_y_ac_csbp;
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UWORD8 *pu1_left_uv_ac_csbp;
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UWORD8 *pu1_left_yuv_dc_csbp;
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/***************************************************************************/
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/* Ref_idx contexts are stored in the following way */
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/* Array Idx 0,1 for reference indices in Forward direction */
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/* Array Idx 2,3 for reference indices in backward direction */
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/***************************************************************************/
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/* Dimensions for u1_left_ref_ctxt_inc_arr is [2][4] for Mbaff:Top and Bot */
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WORD8 i1_left_ref_idx_ctx_inc_arr[2][4];
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WORD8 *pi1_left_ref_idx_ctxt_inc;
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/* Dimensions for u1_left_mv_ctxt_inc_arr is [2][4][4] for Mbaff case */
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UWORD8 u1_left_mv_ctxt_inc_arr[2][4][4];
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UWORD8 (*pu1_left_mv_ctxt_inc)[4];
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} isvce_cabac_ctxt_t;
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#endif
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