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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 ih264_cavlc_tables.h
*
* @brief
* This file contains enumerations, macros and extern declarations of H264
* cavlc tables
*
* @author
* Ittiam
*
* @remarks
* none
******************************************************************************
*/
#ifndef IH264_CAVLC_TABLES_H_
#define IH264_CAVLC_TABLES_H_
/*****************************************************************************/
/* Constant Macros */
/*****************************************************************************/
/**
******************************************************************************
* @brief maximum zeros left
******************************************************************************
*/
#define MAX_ZERO_LEFT 6
/*****************************************************************************/
/* Extern global declarations */
/*****************************************************************************/
/**
******************************************************************************
* @brief Assignment of cbp to a codenum for intra and inter prediction modes
* chroma format idc != 0
* input : cbp, intra - 0/inter - 1
* output : codenum
* @remarks Table 9-4 – Assignment of codeNum to values of coded_block_pattern
* for macroblock prediction modes in H264 spec
******************************************************************************
*/
extern const UWORD8 gu1_cbp_map_tables[48][2];
/**
******************************************************************************
* @brief total non-zero coefficients and numbers of trailing ones of a residual
* block are mapped to coefftoken using the tables given below.
* input : VLC-Num | Trailing ones | Total coeffs
* output : coeff_token (code word, size of the code word)
* @remarks Table-9-5 coeff_token mapping to TotalCoeff( coeff_token )
* and TrailingOnes( coeff_token ) in H264 spec
******************************************************************************
*/
extern const UWORD8 gu1_code_coeff_token_table[3][4][16];
extern const UWORD8 gu1_size_coeff_token_table[3][4][16];
extern const UWORD8 gu1_code_coeff_token_table_chroma[4][4];
extern const UWORD8 gu1_size_coeff_token_table_chroma[4][4];
/**
******************************************************************************
* @brief Thresholds for determining whether to increment Level table number.
* input : suffix_length
* output : threshold
******************************************************************************
*/
extern const UWORD8 gu1_threshold_vlc_level[6];
/**
******************************************************************************
* @brief table for encoding total number of zeros
* input : coeff_token, total zeros
* output : code word, size of the code word
* @remarks Table-9-7, 9-8 total_zeros tables for 4x4 blocks with
* TotalCoeff( coeff_token ) in H264 spec
******************************************************************************
*/
extern const UWORD8 gu1_size_zero_table[135];
extern const UWORD8 gu1_code_zero_table[135];
extern const UWORD8 gu1_size_zero_table_chroma[9];
extern const UWORD8 gu1_code_zero_table_chroma[9];
/**
******************************************************************************
* @brief index to access zero table (for speed)
* input : TotalCoeff( coeff_token )
* output : index to access zero table
******************************************************************************
*/
extern const UWORD8 gu1_index_zero_table[15];
/**
******************************************************************************
* @brief table for encoding runs of zeros before
* input : zeros left, runs of zeros before
* output : code word, size of the code word
* @remarks Table-9-10 table for run_before in H264 spec
******************************************************************************
*/
extern const UWORD8 gu1_size_run_table[42];
extern const UWORD8 gu1_code_run_table[42];
/**
******************************************************************************
* @brief index to access run table (look up)
* input : zeros left
* output : index to access run table
******************************************************************************
*/
extern const UWORD8 gu1_index_run_table[7];
#endif /* IH264_CAVLC_TABLES_H_ */
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