1 /****************************************************************************** 2 * 3 * Copyright (C) 2015 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ***************************************************************************** 18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 */ 20 21 22 /** 23 ****************************************************************************** 24 * @file 25 * ih264_cavlc_tables.c 26 * 27 * @brief 28 * This file contains H264 cavlc tables for encoding coeff_tokens, levels, total 29 * zeros and runs before zeros 30 * 31 * @author 32 * Ittiam 33 * 34 * @par List of Tables 35 * - gu1_code_coeff_token_table 36 * - gu1_size_coeff_token_table 37 * - gu1_code_coeff_token_table_chroma 38 * - gu1_size_coeff_token_table_chroma 39 * - gu1_threshold_vlc_level 40 * - gu1_size_zero_table 41 * - gu1_code_zero_table 42 * - gu1_size_zero_table_chroma 43 * - gu1_code_zero_table_chroma 44 * - gu1_index_zero_table 45 * - gu1_size_run_table 46 * - gu1_code_run_table 47 * - gu4_codeword_level_tables 48 * - gu1_codesize_level_tables 49 * 50 * @remarks 51 * none 52 * 53 ****************************************************************************** 54 */ 55 56 /*****************************************************************************/ 57 /* File Includes */ 58 /*****************************************************************************/ 59 60 /* User include files */ 61 #include "ih264_typedefs.h" 62 #include "ih264_cavlc_tables.h" 63 64 65 /*****************************************************************************/ 66 /* Extern global definitions */ 67 /*****************************************************************************/ 68 69 /** 70 ****************************************************************************** 71 * @brief Assignment of cbp to a codenum for intra and inter prediction modes 72 * chroma format idc != 0 73 * input : cbp, intra - 0/inter - 1 74 * output : codenum 75 * @remarks Table 9-4 Assignment of codeNum to values of coded_block_pattern 76 * for macroblock prediction modes in H264 spec 77 ****************************************************************************** 78 */ 79 const UWORD8 gu1_cbp_map_tables[48][2]= 80 { 81 { 3, 0}, {29, 2}, {30, 3}, {17, 7}, {31, 4}, {18, 8}, {37, 17}, { 8, 13}, 82 {32, 5}, {38, 18}, {19, 9}, { 9, 14}, {20, 10}, {10, 15}, {11, 16}, { 2, 11}, 83 {16, 1}, {33, 32}, {34, 33}, {21, 36}, {35, 34}, {22, 37}, {39, 44}, { 4, 40}, 84 {36, 35}, {40, 45}, {23, 38}, { 5, 41}, {24, 39}, { 6, 42}, { 7, 43}, { 1, 19}, 85 {41, 6}, {42, 24}, {43, 25}, {25, 20}, {44, 26}, {26, 21}, {46, 46}, {12, 28}, 86 {45, 27}, {47, 47}, {27, 22}, {13, 29}, {28, 23}, {14, 30}, {15, 31}, { 0, 12}, 87 }; 88 89 90 /** 91 ****************************************************************************** 92 * @brief total non-zero coefficients and numbers of trailing ones of a residual 93 * block are mapped to coeff_token using the tables given below. 94 * input : VLC-Num | Trailing ones | Total coeffs 95 * output : coeff_token (code word, size of the code word) 96 * @remarks Table-9-5 coeff_token mapping to TotalCoeff( coeff_token ) 97 * and TrailingOnes( coeff_token ) in H264 spec 98 ****************************************************************************** 99 */ 100 const UWORD8 gu1_code_coeff_token_table[3][4][16] = 101 { 102 { 103 { 5, 7, 7, 7, 7, 15, 11, 8, 15, 11, 15, 11, 15, 11, 7, 4, }, 104 { 1, 4, 6, 6, 6, 6, 14, 10, 14, 10, 14, 10, 1, 14, 10, 6, }, 105 { 0, 1, 5, 5, 5, 5, 5, 13, 9, 13, 9, 13, 9, 13, 9, 5, }, 106 { 0, 0, 3, 3, 4, 4, 4, 4, 4, 12, 12, 8, 12, 8, 12, 8, }, 107 }, 108 { 109 {11, 7, 7, 7, 4, 7, 15, 11, 15, 11, 8, 15, 11, 7, 9, 7, }, 110 { 2, 7, 10, 6, 6, 6, 6, 14, 10, 14, 10, 14, 10, 11, 8, 6, }, 111 { 0, 3, 9, 5, 5, 5, 5, 13, 9, 13, 9, 13, 9, 6, 10, 5, }, 112 { 0, 0, 5, 4, 6, 8, 4, 4, 4, 12, 8, 12, 12, 8, 1, 4, }, 113 }, 114 { 115 {15, 11, 8, 15, 11, 9, 8, 15, 11, 15, 11, 8, 13, 9, 5, 1, }, 116 {14, 15, 12, 10, 8, 14, 10, 14, 14, 10, 14, 10, 7, 12, 8, 4, }, 117 { 0, 13, 14, 11, 9, 13, 9, 13, 10, 13, 9, 13, 9, 11, 7, 3, }, 118 { 0, 0, 12, 11, 10, 9, 8, 13, 12, 12, 12, 8, 12, 10, 6, 2, }, 119 }, 120 }; 121 122 const UWORD8 gu1_size_coeff_token_table[3][4][16] = 123 { 124 { 125 { 6, 8, 9, 10, 11, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, }, 126 { 2, 6, 8, 9, 10, 11, 13, 13, 14, 14, 15, 15, 15, 16, 16, 16, }, 127 { 0, 3, 7, 8, 9, 10, 11, 13, 13, 14, 14, 15, 15, 16, 16, 16, }, 128 { 0, 0, 5, 6, 7, 8, 9, 10, 11, 13, 14, 14, 15, 15, 16, 16, }, 129 }, 130 { 131 { 6, 6, 7, 8, 8, 9, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, }, 132 { 2, 5, 6, 6, 7, 8, 9, 11, 11, 12, 12, 13, 13, 14, 14, 14, }, 133 { 0, 3, 6, 6, 7, 8, 9, 11, 11, 12, 12, 13, 13, 13, 14, 14, }, 134 { 0, 0, 4, 4, 5, 6, 6, 7, 9, 11, 11, 12, 13, 13, 13, 14, }, 135 }, 136 { 137 { 6, 6, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10, }, 138 { 4, 5, 5, 5, 5, 6, 6, 7, 8, 8, 9, 9, 9, 10, 10, 10, }, 139 { 0, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, }, 140 { 0, 0, 4, 4, 4, 4, 4, 5, 6, 7, 8, 8, 9, 10, 10, 10, }, 141 }, 142 }; 143 const UWORD8 gu1_code_coeff_token_table_chroma[4][4] = 144 { 145 { 7, 4, 3, 2, }, 146 { 1, 6, 3, 3, }, 147 { 0, 1, 2, 2, }, 148 { 0, 0, 5, 0, }, 149 }; 150 151 const UWORD8 gu1_size_coeff_token_table_chroma[4][4] = 152 { 153 { 6, 6, 6, 6, }, 154 { 1, 6, 7, 8, }, 155 { 0, 3, 7, 8, }, 156 { 0, 0, 6, 7, }, 157 }; 158 159 /** 160 ****************************************************************************** 161 * @brief After encoding the current Level, to encode the next level, the choice 162 * of VLC table needs to be updated. The update is carried basing on a set of thresholds. 163 * These thresholds are listed in the table below for lookup. 164 * input : suffix_length 165 * output : threshold 166 ****************************************************************************** 167 */ 168 const UWORD8 gu1_threshold_vlc_level[6] = 169 { 170 0, 3, 6, 12, 24, 48 171 }; 172 173 174 /** 175 ****************************************************************************** 176 * @brief table for encoding total number of zeros 177 * input : coeff_token, total zeros 178 * output : code word, size of the code word 179 * @remarks Table-9-7, 9-8 total_zeros tables for 4x4 blocks with 180 * TotalCoeff( coeff_token ) in H264 spec 181 ****************************************************************************** 182 */ 183 const UWORD8 gu1_size_zero_table[135] = 184 { 185 1, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9, 186 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 187 4, 3, 3, 3, 4, 4, 3, 3, 4, 5, 5, 6, 5, 6, 188 5, 3, 4, 4, 3, 3, 3, 4, 3, 4, 5, 5, 5, 189 4, 4, 4, 3, 3, 3, 3, 3, 4, 5, 4, 5, 190 6, 5, 3, 3, 3, 3, 3, 3, 4, 3, 6, 191 6, 5, 3, 3, 3, 2, 3, 4, 3, 6, 192 6, 4, 5, 3, 2, 2, 3, 3, 6, 193 6, 6, 4, 2, 2, 3, 2, 5, 194 5, 5, 3, 2, 2, 2, 4, 195 4, 4, 3, 3, 1, 3, 196 4, 4, 2, 1, 3, 197 3, 3, 1, 2, 198 2, 2, 1, 199 1, 1, 200 }; 201 const UWORD8 gu1_code_zero_table[135] = 202 { 203 1, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1, 204 7, 6, 5, 4, 3, 5, 4, 3, 2, 3, 2, 3, 2, 1, 0, 205 5, 7, 6, 5, 4, 3, 4, 3, 2, 3, 2, 1, 1, 0, 206 3, 7, 5, 4, 6, 5, 4, 3, 3, 2, 2, 1, 0, 207 5, 4, 3, 7, 6, 5, 4, 3, 2, 1, 1, 0, 208 1, 1, 7, 6, 5, 4, 3, 2, 1, 1, 0, 209 1, 1, 5, 4, 3, 3, 2, 1, 1, 0, 210 1, 1, 1, 3, 3, 2, 2, 1, 0, 211 1, 0, 1, 3, 2, 1, 1, 1, 212 1, 0, 1, 3, 2, 1, 1, 213 0, 1, 1, 2, 1, 3, 214 0, 1, 1, 1, 1, 215 0, 1, 1, 1, 216 0, 1, 1, 217 0, 1, 218 }; 219 const UWORD8 gu1_size_zero_table_chroma[9] = 220 { 221 1, 2, 3, 3, 222 1, 2, 2, 223 1, 1, 224 }; 225 const UWORD8 gu1_code_zero_table_chroma[9] = 226 { 227 1, 1, 1, 0, 228 1, 1, 0, 229 1, 0, 230 }; 231 232 /** 233 ****************************************************************************** 234 * @brief index to access zero table (look up) 235 * input : TotalCoeff( coeff_token ) 236 * output : index to access zero table 237 ****************************************************************************** 238 */ 239 const UWORD8 gu1_index_zero_table[15] = 240 { 241 0, 16, 31, 45, 58, 70, 81, 91, 100, 108, 115, 121, 126, 130, 133, 242 }; 243 244 /** 245 ****************************************************************************** 246 * @brief table for encoding runs of zeros before 247 * input : zeros left, runs of zeros before 248 * output : code word, size of the code word 249 * @remarks Table-9-10 table for run_before in H264 spec 250 ****************************************************************************** 251 */ 252 const UWORD8 gu1_size_run_table[42] = 253 { 254 1, 1, 255 1, 2, 2, 256 2, 2, 2, 2, 257 2, 2, 2, 3, 3, 258 2, 2, 3, 3, 3, 3, 259 2, 3, 3, 3, 3, 3, 3, 260 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 261 }; 262 const UWORD8 gu1_code_run_table[42] = 263 { 264 1, 0, 265 1, 1, 0, 266 3, 2, 1, 0, 267 3, 2, 1, 1, 0, 268 3, 2, 3, 2, 1, 0, 269 3, 0, 1, 3, 2, 5, 4, 270 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 271 }; 272 /** 273 ****************************************************************************** 274 * @brief index to access zero table (look up) 275 * input : TotalCoeff( coeff_token ) 276 * output : index to access zero table 277 ****************************************************************************** 278 */ 279 const UWORD8 gu1_index_run_table[7] = 280 { 281 0, 2, 5, 9, 14, 20, 27, 282 }; 283
