/****************************************************************************** * * 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 #include #include #include #include #include /* 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)); }