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223 lines
6.4 KiB
223 lines
6.4 KiB
/******************************************************************************
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*
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* Copyright (C) 2015 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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* ih264e_cabac_init.c
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*
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* @brief
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* Contains all initialization functions for cabac contexts
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*
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* @author
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* Doney Alex
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*
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* @par List of Functions:
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*
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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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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* System include files */
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <assert.h>
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/* User include files */
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#include "ih264_typedefs.h"
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#include "iv2.h"
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#include "ive2.h"
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#include "ih264_defs.h"
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#include "ih264_debug.h"
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#include "ime_distortion_metrics.h"
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#include "ime_defs.h"
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#include "ime_structs.h"
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#include "ih264_error.h"
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#include "ih264_structs.h"
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#include "ih264_trans_quant_itrans_iquant.h"
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#include "ih264_inter_pred_filters.h"
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#include "ih264_mem_fns.h"
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#include "ih264_padding.h"
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#include "ih264_intra_pred_filters.h"
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#include "ih264_deblk_edge_filters.h"
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#include "ih264_platform_macros.h"
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#include "ih264_macros.h"
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#include "ih264_buf_mgr.h"
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#include "ih264e_error.h"
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#include "ih264e_bitstream.h"
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#include "ih264_common_tables.h"
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#include "ih264_cabac_tables.h"
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#include "ih264_list.h"
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#include "ih264e_defs.h"
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#include "irc_cntrl_param.h"
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#include "irc_frame_info_collector.h"
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#include "ih264e_rate_control.h"
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#include "ih264e_cabac_structs.h"
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#include "ih264e_structs.h"
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#include "ih264e_cabac.h"
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#include "ih264e_process.h"
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#include "ithread.h"
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#include "ih264e_intra_modes_eval.h"
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#include "ih264e_encode_header.h"
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#include "ih264e_globals.h"
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#include "ih264e_config.h"
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#include "ih264e_trace.h"
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#include "ih264e_statistics.h"
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#include "ih264_cavlc_tables.h"
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#include "ih264e_deblk.h"
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#include "ih264e_me.h"
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#include "ih264e_debug.h"
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#include "ih264e_master.h"
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#include "ih264e_utils.h"
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#include "irc_mem_req_and_acq.h"
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#include "irc_rate_control_api.h"
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#include "ih264e_platform_macros.h"
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#include "ime_statistics.h"
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/*****************************************************************************/
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/* Function definitions . */
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/*****************************************************************************/
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/**
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*******************************************************************************
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*
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* @brief
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* Initialize cabac encoding environment
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*
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* @param[in] ps_cab_enc_env
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* Pointer to encoding_envirnoment_t structure
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*
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* @returns
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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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static void ih264e_init_cabac_enc_envirnoment(encoding_envirnoment_t *ps_cab_enc_env)
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{
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ps_cab_enc_env->u4_code_int_low = 0;
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ps_cab_enc_env->u4_code_int_range = 0x1fe;
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ps_cab_enc_env->u4_out_standing_bytes = 0;
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ps_cab_enc_env->u4_bits_gen = 0;
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}
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/**
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*******************************************************************************
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*
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* @brief
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* Initialize default context values and pointers (Called once at the beginning of encoding).
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*
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* @param[in] ps_ent_ctxt
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* Pointer to entropy context structure
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*
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* @returns
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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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void ih264e_init_cabac_table(entropy_ctxt_t *ps_ent_ctxt)
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{
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/* CABAC context */
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cabac_ctxt_t *ps_cabac_ctxt = ps_ent_ctxt->ps_cabac;
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ps_cabac_ctxt->ps_mb_map_ctxt_inc = ps_cabac_ctxt->ps_mb_map_ctxt_inc_base + 1;
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ps_cabac_ctxt->ps_lft_csbp = &ps_cabac_ctxt->s_lft_csbp;
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ps_cabac_ctxt->ps_bitstrm = ps_ent_ctxt->ps_bitstrm;
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{
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/* 0th entry of mb_map_ctxt_inc will be always be containing default values */
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/* for CABAC context representing MB not available */
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mb_info_ctxt_t *ps_def_ctxt = ps_cabac_ctxt->ps_mb_map_ctxt_inc - 1;
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ps_def_ctxt->u1_mb_type = CAB_SKIP;
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ps_def_ctxt->u1_cbp = 0x0f;
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ps_def_ctxt->u1_intrapred_chroma_mode = 0;
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memset(ps_def_ctxt->i1_ref_idx, 0, sizeof(ps_def_ctxt->i1_ref_idx));
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memset(ps_def_ctxt->u1_mv, 0, sizeof(ps_def_ctxt->u1_mv));
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ps_cabac_ctxt->ps_def_ctxt_mb_info = ps_def_ctxt;
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}
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}
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/**
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*******************************************************************************
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*
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* @brief
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* Initialize cabac context: Initialize all contest with init values given in the spec.
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* Called at the beginning of entropy coding of each slice for CABAC encoding.
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*
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* @param[in] ps_ent_ctxt
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* Pointer to entropy context structure
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*
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* @returns
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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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void ih264e_init_cabac_ctxt(entropy_ctxt_t *ps_ent_ctxt)
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{
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/* CABAC context */
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cabac_ctxt_t *ps_cabac_ctxt = ps_ent_ctxt->ps_cabac;
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/* slice header */
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slice_header_t *ps_slice_hdr = ps_ent_ctxt->ps_slice_hdr_base;
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const UWORD8 u1_slice_type = ps_slice_hdr->u1_slice_type;
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WORD8 i1_cabac_init_idc = 0;
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bin_ctxt_model *au1_cabac_ctxt_table = ps_cabac_ctxt->au1_cabac_ctxt_table;
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UWORD8 u1_qp_y = ps_slice_hdr->i1_slice_qp;
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ih264e_init_cabac_enc_envirnoment(&ps_cabac_ctxt->s_cab_enc_env);
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ps_cabac_ctxt->i1_prevps_mb_qp_delta_ctxt = 0;
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if (ISLICE != u1_slice_type)
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{
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i1_cabac_init_idc = ps_slice_hdr->i1_cabac_init_idc;
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}
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else
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{
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i1_cabac_init_idc = 3;
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}
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memcpy(au1_cabac_ctxt_table,
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gau1_ih264_cabac_ctxt_init_table[i1_cabac_init_idc][u1_qp_y],
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NUM_CABAC_CTXTS * sizeof(bin_ctxt_model));
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}
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