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/******************************************************************************
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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 ih264_cavlc_tables.h
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*
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* @brief
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* This file contains enumerations, macros and extern declarations of H264
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* cavlc tables
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*
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* @author
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* Ittiam
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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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#ifndef IH264_CAVLC_TABLES_H_
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#define IH264_CAVLC_TABLES_H_
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/*****************************************************************************/
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/* Constant Macros */
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/*****************************************************************************/
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/**
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******************************************************************************
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* @brief maximum zeros left
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******************************************************************************
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*/
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#define MAX_ZERO_LEFT 6
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/*****************************************************************************/
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/* Extern global declarations */
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/*****************************************************************************/
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/**
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******************************************************************************
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* @brief Assignment of cbp to a codenum for intra and inter prediction modes
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* chroma format idc != 0
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* input : cbp, intra - 0/inter - 1
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* output : codenum
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* @remarks Table 9-4 <20> Assignment of codeNum to values of coded_block_pattern
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* for macroblock prediction modes in H264 spec
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******************************************************************************
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*/
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extern const UWORD8 gu1_cbp_map_tables[48][2];
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/**
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******************************************************************************
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* @brief total non-zero coefficients and numbers of trailing ones of a residual
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* block are mapped to coefftoken using the tables given below.
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* input : VLC-Num | Trailing ones | Total coeffs
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* output : coeff_token (code word, size of the code word)
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* @remarks Table-9-5 coeff_token mapping to TotalCoeff( coeff_token )
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* and TrailingOnes( coeff_token ) in H264 spec
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******************************************************************************
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*/
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extern const UWORD8 gu1_code_coeff_token_table[3][4][16];
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extern const UWORD8 gu1_size_coeff_token_table[3][4][16];
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extern const UWORD8 gu1_code_coeff_token_table_chroma[4][4];
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extern const UWORD8 gu1_size_coeff_token_table_chroma[4][4];
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/**
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******************************************************************************
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* @brief Thresholds for determining whether to increment Level table number.
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* input : suffix_length
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* output : threshold
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******************************************************************************
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*/
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extern const UWORD8 gu1_threshold_vlc_level[6];
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/**
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******************************************************************************
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* @brief table for encoding total number of zeros
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* input : coeff_token, total zeros
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* output : code word, size of the code word
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* @remarks Table-9-7, 9-8 total_zeros tables for 4x4 blocks with
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* TotalCoeff( coeff_token ) in H264 spec
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******************************************************************************
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*/
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extern const UWORD8 gu1_size_zero_table[135];
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extern const UWORD8 gu1_code_zero_table[135];
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extern const UWORD8 gu1_size_zero_table_chroma[9];
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extern const UWORD8 gu1_code_zero_table_chroma[9];
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/**
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******************************************************************************
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* @brief index to access zero table (for speed)
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* input : TotalCoeff( coeff_token )
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* output : index to access zero table
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******************************************************************************
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*/
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extern const UWORD8 gu1_index_zero_table[15];
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/**
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******************************************************************************
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* @brief table for encoding runs of zeros before
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* input : zeros left, runs of zeros before
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* output : code word, size of the code word
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* @remarks Table-9-10 table for run_before in H264 spec
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******************************************************************************
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*/
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extern const UWORD8 gu1_size_run_table[42];
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extern const UWORD8 gu1_code_run_table[42];
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/**
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******************************************************************************
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* @brief index to access run table (look up)
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* input : zeros left
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* output : index to access run table
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******************************************************************************
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*/
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extern const UWORD8 gu1_index_run_table[7];
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#endif /* IH264_CAVLC_TABLES_H_ */
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