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