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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.c
*
* @brief
* This file contains H264 cavlc tables for encoding coeff_tokens, levels, total
* zeros and runs before zeros
*
* @author
* Ittiam
*
* @par List of Tables
* - gu1_code_coeff_token_table
* - gu1_size_coeff_token_table
* - gu1_code_coeff_token_table_chroma
* - gu1_size_coeff_token_table_chroma
* - gu1_threshold_vlc_level
* - gu1_size_zero_table
* - gu1_code_zero_table
* - gu1_size_zero_table_chroma
* - gu1_code_zero_table_chroma
* - gu1_index_zero_table
* - gu1_size_run_table
* - gu1_code_run_table
* - gu4_codeword_level_tables
* - gu1_codesize_level_tables
*
* @remarks
* none
*
******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* User include files */
#include "ih264_typedefs.h"
#include "ih264_cavlc_tables.h"
/*****************************************************************************/
/* Extern global definitions */
/*****************************************************************************/
/**
******************************************************************************
* @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
******************************************************************************
*/
const UWORD8 gu1_cbp_map_tables[48][2]=
{
{ 3, 0}, {29, 2}, {30, 3}, {17, 7}, {31, 4}, {18, 8}, {37, 17}, { 8, 13},
{32, 5}, {38, 18}, {19, 9}, { 9, 14}, {20, 10}, {10, 15}, {11, 16}, { 2, 11},
{16, 1}, {33, 32}, {34, 33}, {21, 36}, {35, 34}, {22, 37}, {39, 44}, { 4, 40},
{36, 35}, {40, 45}, {23, 38}, { 5, 41}, {24, 39}, { 6, 42}, { 7, 43}, { 1, 19},
{41, 6}, {42, 24}, {43, 25}, {25, 20}, {44, 26}, {26, 21}, {46, 46}, {12, 28},
{45, 27}, {47, 47}, {27, 22}, {13, 29}, {28, 23}, {14, 30}, {15, 31}, { 0, 12},
};
/**
******************************************************************************
* @brief total non-zero coefficients and numbers of trailing ones of a residual
* block are mapped to coeff_token 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
******************************************************************************
*/
const UWORD8 gu1_code_coeff_token_table[3][4][16] =
{
{
{ 5, 7, 7, 7, 7, 15, 11, 8, 15, 11, 15, 11, 15, 11, 7, 4, },
{ 1, 4, 6, 6, 6, 6, 14, 10, 14, 10, 14, 10, 1, 14, 10, 6, },
{ 0, 1, 5, 5, 5, 5, 5, 13, 9, 13, 9, 13, 9, 13, 9, 5, },
{ 0, 0, 3, 3, 4, 4, 4, 4, 4, 12, 12, 8, 12, 8, 12, 8, },
},
{
{11, 7, 7, 7, 4, 7, 15, 11, 15, 11, 8, 15, 11, 7, 9, 7, },
{ 2, 7, 10, 6, 6, 6, 6, 14, 10, 14, 10, 14, 10, 11, 8, 6, },
{ 0, 3, 9, 5, 5, 5, 5, 13, 9, 13, 9, 13, 9, 6, 10, 5, },
{ 0, 0, 5, 4, 6, 8, 4, 4, 4, 12, 8, 12, 12, 8, 1, 4, },
},
{
{15, 11, 8, 15, 11, 9, 8, 15, 11, 15, 11, 8, 13, 9, 5, 1, },
{14, 15, 12, 10, 8, 14, 10, 14, 14, 10, 14, 10, 7, 12, 8, 4, },
{ 0, 13, 14, 11, 9, 13, 9, 13, 10, 13, 9, 13, 9, 11, 7, 3, },
{ 0, 0, 12, 11, 10, 9, 8, 13, 12, 12, 12, 8, 12, 10, 6, 2, },
},
};
const UWORD8 gu1_size_coeff_token_table[3][4][16] =
{
{
{ 6, 8, 9, 10, 11, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, },
{ 2, 6, 8, 9, 10, 11, 13, 13, 14, 14, 15, 15, 15, 16, 16, 16, },
{ 0, 3, 7, 8, 9, 10, 11, 13, 13, 14, 14, 15, 15, 16, 16, 16, },
{ 0, 0, 5, 6, 7, 8, 9, 10, 11, 13, 14, 14, 15, 15, 16, 16, },
},
{
{ 6, 6, 7, 8, 8, 9, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, },
{ 2, 5, 6, 6, 7, 8, 9, 11, 11, 12, 12, 13, 13, 14, 14, 14, },
{ 0, 3, 6, 6, 7, 8, 9, 11, 11, 12, 12, 13, 13, 13, 14, 14, },
{ 0, 0, 4, 4, 5, 6, 6, 7, 9, 11, 11, 12, 13, 13, 13, 14, },
},
{
{ 6, 6, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10, },
{ 4, 5, 5, 5, 5, 6, 6, 7, 8, 8, 9, 9, 9, 10, 10, 10, },
{ 0, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, },
{ 0, 0, 4, 4, 4, 4, 4, 5, 6, 7, 8, 8, 9, 10, 10, 10, },
},
};
const UWORD8 gu1_code_coeff_token_table_chroma[4][4] =
{
{ 7, 4, 3, 2, },
{ 1, 6, 3, 3, },
{ 0, 1, 2, 2, },
{ 0, 0, 5, 0, },
};
const UWORD8 gu1_size_coeff_token_table_chroma[4][4] =
{
{ 6, 6, 6, 6, },
{ 1, 6, 7, 8, },
{ 0, 3, 7, 8, },
{ 0, 0, 6, 7, },
};
/**
******************************************************************************
* @brief After encoding the current Level, to encode the next level, the choice
* of VLC table needs to be updated. The update is carried basing on a set of thresholds.
* These thresholds are listed in the table below for lookup.
* input : suffix_length
* output : threshold
******************************************************************************
*/
const UWORD8 gu1_threshold_vlc_level[6] =
{
0, 3, 6, 12, 24, 48
};
/**
******************************************************************************
* @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
******************************************************************************
*/
const UWORD8 gu1_size_zero_table[135] =
{
1, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9,
3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6,
4, 3, 3, 3, 4, 4, 3, 3, 4, 5, 5, 6, 5, 6,
5, 3, 4, 4, 3, 3, 3, 4, 3, 4, 5, 5, 5,
4, 4, 4, 3, 3, 3, 3, 3, 4, 5, 4, 5,
6, 5, 3, 3, 3, 3, 3, 3, 4, 3, 6,
6, 5, 3, 3, 3, 2, 3, 4, 3, 6,
6, 4, 5, 3, 2, 2, 3, 3, 6,
6, 6, 4, 2, 2, 3, 2, 5,
5, 5, 3, 2, 2, 2, 4,
4, 4, 3, 3, 1, 3,
4, 4, 2, 1, 3,
3, 3, 1, 2,
2, 2, 1,
1, 1,
};
const UWORD8 gu1_code_zero_table[135] =
{
1, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1,
7, 6, 5, 4, 3, 5, 4, 3, 2, 3, 2, 3, 2, 1, 0,
5, 7, 6, 5, 4, 3, 4, 3, 2, 3, 2, 1, 1, 0,
3, 7, 5, 4, 6, 5, 4, 3, 3, 2, 2, 1, 0,
5, 4, 3, 7, 6, 5, 4, 3, 2, 1, 1, 0,
1, 1, 7, 6, 5, 4, 3, 2, 1, 1, 0,
1, 1, 5, 4, 3, 3, 2, 1, 1, 0,
1, 1, 1, 3, 3, 2, 2, 1, 0,
1, 0, 1, 3, 2, 1, 1, 1,
1, 0, 1, 3, 2, 1, 1,
0, 1, 1, 2, 1, 3,
0, 1, 1, 1, 1,
0, 1, 1, 1,
0, 1, 1,
0, 1,
};
const UWORD8 gu1_size_zero_table_chroma[9] =
{
1, 2, 3, 3,
1, 2, 2,
1, 1,
};
const UWORD8 gu1_code_zero_table_chroma[9] =
{
1, 1, 1, 0,
1, 1, 0,
1, 0,
};
/**
******************************************************************************
* @brief index to access zero table (look up)
* input : TotalCoeff( coeff_token )
* output : index to access zero table
******************************************************************************
*/
const UWORD8 gu1_index_zero_table[15] =
{
0, 16, 31, 45, 58, 70, 81, 91, 100, 108, 115, 121, 126, 130, 133,
};
/**
******************************************************************************
* @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
******************************************************************************
*/
const UWORD8 gu1_size_run_table[42] =
{
1, 1,
1, 2, 2,
2, 2, 2, 2,
2, 2, 2, 3, 3,
2, 2, 3, 3, 3, 3,
2, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11,
};
const UWORD8 gu1_code_run_table[42] =
{
1, 0,
1, 1, 0,
3, 2, 1, 0,
3, 2, 1, 1, 0,
3, 2, 3, 2, 1, 0,
3, 0, 1, 3, 2, 5, 4,
7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1,
};
/**
******************************************************************************
* @brief index to access zero table (look up)
* input : TotalCoeff( coeff_token )
* output : index to access zero table
******************************************************************************
*/
const UWORD8 gu1_index_run_table[7] =
{
0, 2, 5, 9, 14, 20, 27,
};
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