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-rw-r--r--encoder/ih264e_cabac_init.c226
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diff --git a/encoder/ih264e_cabac_init.c b/encoder/ih264e_cabac_init.c
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+/******************************************************************************
+ *
+ * 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;
+ UWORD32 *pu4_temp;
+ WORD8 i;
+
+ ps_def_ctxt->u1_mb_type = CAB_SKIP;
+ ps_def_ctxt->u1_cbp = 0x0f;
+ ps_def_ctxt->u1_intrapred_chroma_mode = 0;
+ pu4_temp = (UWORD32 *)ps_def_ctxt->i1_ref_idx;
+ pu4_temp[0] = 0;
+ pu4_temp = (UWORD32 *)ps_def_ctxt->u1_mv;
+ for (i = 0; i < 4; i++, pu4_temp++)
+ (*pu4_temp) = 0;
+ 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));
+
+}
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