You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
222 lines
6.4 KiB
222 lines
6.4 KiB
/****************************************************************************** |
|
* |
|
* 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 |
|
* ih264e_cabac_init.c |
|
* |
|
* @brief |
|
* Contains all initialization functions for cabac contexts |
|
* |
|
* @author |
|
* Doney Alex |
|
* |
|
* @par List of Functions: |
|
* |
|
* |
|
* @remarks |
|
* None |
|
* |
|
******************************************************************************* |
|
*/ |
|
|
|
/*****************************************************************************/ |
|
/* File Includes */ |
|
/*****************************************************************************/ |
|
|
|
/* System include files */ |
|
#include <stdio.h> |
|
#include <stddef.h> |
|
#include <stdlib.h> |
|
#include <string.h> |
|
#include <limits.h> |
|
#include <assert.h> |
|
|
|
/* User include files */ |
|
#include "ih264_typedefs.h" |
|
#include "iv2.h" |
|
#include "ive2.h" |
|
#include "ih264_defs.h" |
|
#include "ih264_debug.h" |
|
#include "ime_distortion_metrics.h" |
|
#include "ime_defs.h" |
|
#include "ime_structs.h" |
|
#include "ih264_error.h" |
|
#include "ih264_structs.h" |
|
#include "ih264_trans_quant_itrans_iquant.h" |
|
#include "ih264_inter_pred_filters.h" |
|
#include "ih264_mem_fns.h" |
|
#include "ih264_padding.h" |
|
#include "ih264_intra_pred_filters.h" |
|
#include "ih264_deblk_edge_filters.h" |
|
#include "ih264_platform_macros.h" |
|
#include "ih264_macros.h" |
|
#include "ih264_buf_mgr.h" |
|
#include "ih264e_error.h" |
|
#include "ih264e_bitstream.h" |
|
#include "ih264_common_tables.h" |
|
#include "ih264_cabac_tables.h" |
|
#include "ih264_list.h" |
|
#include "ih264e_defs.h" |
|
#include "irc_cntrl_param.h" |
|
#include "irc_frame_info_collector.h" |
|
#include "ih264e_rate_control.h" |
|
#include "ih264e_cabac_structs.h" |
|
#include "ih264e_structs.h" |
|
#include "ih264e_cabac.h" |
|
#include "ih264e_process.h" |
|
#include "ithread.h" |
|
#include "ih264e_intra_modes_eval.h" |
|
#include "ih264e_encode_header.h" |
|
#include "ih264e_globals.h" |
|
#include "ih264e_config.h" |
|
#include "ih264e_trace.h" |
|
#include "ih264e_statistics.h" |
|
#include "ih264_cavlc_tables.h" |
|
#include "ih264e_deblk.h" |
|
#include "ih264e_me.h" |
|
#include "ih264e_debug.h" |
|
#include "ih264e_master.h" |
|
#include "ih264e_utils.h" |
|
#include "irc_mem_req_and_acq.h" |
|
#include "irc_rate_control_api.h" |
|
#include "ih264e_platform_macros.h" |
|
#include "ime_statistics.h" |
|
|
|
|
|
|
|
/*****************************************************************************/ |
|
/* Function definitions . */ |
|
/*****************************************************************************/ |
|
|
|
/** |
|
******************************************************************************* |
|
* |
|
* @brief |
|
* Initialize cabac encoding environment |
|
* |
|
* @param[in] ps_cab_enc_env |
|
* Pointer to encoding_envirnoment_t structure |
|
* |
|
* @returns |
|
* |
|
* @remarks |
|
* None |
|
* |
|
******************************************************************************* |
|
*/ |
|
static void ih264e_init_cabac_enc_envirnoment(encoding_envirnoment_t *ps_cab_enc_env) |
|
{ |
|
ps_cab_enc_env->u4_code_int_low = 0; |
|
ps_cab_enc_env->u4_code_int_range = 0x1fe; |
|
ps_cab_enc_env->u4_out_standing_bytes = 0; |
|
ps_cab_enc_env->u4_bits_gen = 0; |
|
} |
|
|
|
|
|
/** |
|
******************************************************************************* |
|
* |
|
* @brief |
|
* Initialize default context values and pointers (Called once at the beginning of encoding). |
|
* |
|
* @param[in] ps_ent_ctxt |
|
* Pointer to entropy context structure |
|
* |
|
* @returns |
|
* |
|
* @remarks |
|
* None |
|
* |
|
******************************************************************************* |
|
*/ |
|
void ih264e_init_cabac_table(entropy_ctxt_t *ps_ent_ctxt) |
|
{ |
|
/* CABAC context */ |
|
cabac_ctxt_t *ps_cabac_ctxt = ps_ent_ctxt->ps_cabac; |
|
ps_cabac_ctxt->ps_mb_map_ctxt_inc = ps_cabac_ctxt->ps_mb_map_ctxt_inc_base + 1; |
|
ps_cabac_ctxt->ps_lft_csbp = &ps_cabac_ctxt->s_lft_csbp; |
|
ps_cabac_ctxt->ps_bitstrm = ps_ent_ctxt->ps_bitstrm; |
|
|
|
{ |
|
/* 0th entry of mb_map_ctxt_inc will be always be containing default values */ |
|
/* for CABAC context representing MB not available */ |
|
mb_info_ctxt_t *ps_def_ctxt = ps_cabac_ctxt->ps_mb_map_ctxt_inc - 1; |
|
|
|
ps_def_ctxt->u1_mb_type = CAB_SKIP; |
|
ps_def_ctxt->u1_cbp = 0x0f; |
|
ps_def_ctxt->u1_intrapred_chroma_mode = 0; |
|
|
|
memset(ps_def_ctxt->i1_ref_idx, 0, sizeof(ps_def_ctxt->i1_ref_idx)); |
|
memset(ps_def_ctxt->u1_mv, 0, sizeof(ps_def_ctxt->u1_mv)); |
|
ps_cabac_ctxt->ps_def_ctxt_mb_info = ps_def_ctxt; |
|
} |
|
} |
|
|
|
|
|
/** |
|
******************************************************************************* |
|
* |
|
* @brief |
|
* Initialize cabac context: Initialize all contest with init values given in the spec. |
|
* Called at the beginning of entropy coding of each slice for CABAC encoding. |
|
* |
|
* @param[in] ps_ent_ctxt |
|
* Pointer to entropy context structure |
|
* |
|
* @returns |
|
* |
|
* @remarks |
|
* None |
|
* |
|
******************************************************************************* |
|
*/ |
|
void ih264e_init_cabac_ctxt(entropy_ctxt_t *ps_ent_ctxt) |
|
{ |
|
/* CABAC context */ |
|
cabac_ctxt_t *ps_cabac_ctxt = ps_ent_ctxt->ps_cabac; |
|
|
|
/* slice header */ |
|
slice_header_t *ps_slice_hdr = ps_ent_ctxt->ps_slice_hdr_base; |
|
const UWORD8 u1_slice_type = ps_slice_hdr->u1_slice_type; |
|
WORD8 i1_cabac_init_idc = 0; |
|
bin_ctxt_model *au1_cabac_ctxt_table = ps_cabac_ctxt->au1_cabac_ctxt_table; |
|
UWORD8 u1_qp_y = ps_slice_hdr->i1_slice_qp; |
|
|
|
ih264e_init_cabac_enc_envirnoment(&ps_cabac_ctxt->s_cab_enc_env); |
|
|
|
ps_cabac_ctxt->i1_prevps_mb_qp_delta_ctxt = 0; |
|
|
|
if (ISLICE != u1_slice_type) |
|
{ |
|
i1_cabac_init_idc = ps_slice_hdr->i1_cabac_init_idc; |
|
} |
|
else |
|
{ |
|
i1_cabac_init_idc = 3; |
|
|
|
} |
|
|
|
memcpy(au1_cabac_ctxt_table, |
|
gau1_ih264_cabac_ctxt_init_table[i1_cabac_init_idc][u1_qp_y], |
|
NUM_CABAC_CTXTS * sizeof(bin_ctxt_model)); |
|
|
|
}
|
|
|