Libav 0.7.1
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00001 /* 00002 * AC-3 tables 00003 * copyright (c) 2001 Fabrice Bellard 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #include "libavutil/audioconvert.h" 00028 #include "avcodec.h" 00029 #include "ac3tab.h" 00030 00035 const uint16_t ff_ac3_frame_size_tab[38][3] = { 00036 { 64, 69, 96 }, 00037 { 64, 70, 96 }, 00038 { 80, 87, 120 }, 00039 { 80, 88, 120 }, 00040 { 96, 104, 144 }, 00041 { 96, 105, 144 }, 00042 { 112, 121, 168 }, 00043 { 112, 122, 168 }, 00044 { 128, 139, 192 }, 00045 { 128, 140, 192 }, 00046 { 160, 174, 240 }, 00047 { 160, 175, 240 }, 00048 { 192, 208, 288 }, 00049 { 192, 209, 288 }, 00050 { 224, 243, 336 }, 00051 { 224, 244, 336 }, 00052 { 256, 278, 384 }, 00053 { 256, 279, 384 }, 00054 { 320, 348, 480 }, 00055 { 320, 349, 480 }, 00056 { 384, 417, 576 }, 00057 { 384, 418, 576 }, 00058 { 448, 487, 672 }, 00059 { 448, 488, 672 }, 00060 { 512, 557, 768 }, 00061 { 512, 558, 768 }, 00062 { 640, 696, 960 }, 00063 { 640, 697, 960 }, 00064 { 768, 835, 1152 }, 00065 { 768, 836, 1152 }, 00066 { 896, 975, 1344 }, 00067 { 896, 976, 1344 }, 00068 { 1024, 1114, 1536 }, 00069 { 1024, 1115, 1536 }, 00070 { 1152, 1253, 1728 }, 00071 { 1152, 1254, 1728 }, 00072 { 1280, 1393, 1920 }, 00073 { 1280, 1394, 1920 }, 00074 }; 00075 00080 const uint8_t ff_ac3_channels_tab[8] = { 00081 2, 1, 2, 3, 3, 4, 4, 5 00082 }; 00083 00087 const uint16_t ff_ac3_channel_layout_tab[8] = { 00088 AV_CH_LAYOUT_STEREO, 00089 AV_CH_LAYOUT_MONO, 00090 AV_CH_LAYOUT_STEREO, 00091 AV_CH_LAYOUT_SURROUND, 00092 AV_CH_LAYOUT_2_1, 00093 AV_CH_LAYOUT_4POINT0, 00094 AV_CH_LAYOUT_2_2, 00095 AV_CH_LAYOUT_5POINT0 00096 }; 00097 00098 #define COMMON_CHANNEL_MAP \ 00099 { { 0, 1, }, { 0, 1, 2, } },\ 00100 { { 0, }, { 0, 1, } },\ 00101 { { 0, 1, }, { 0, 1, 2, } },\ 00102 { { 0, 2, 1, }, { 0, 2, 1, 3, } },\ 00103 { { 0, 1, 2, }, { 0, 1, 3, 2, } },\ 00104 { { 0, 2, 1, 3, }, { 0, 2, 1, 4, 3, } }, 00105 00110 const uint8_t ff_ac3_enc_channel_map[8][2][6] = { 00111 COMMON_CHANNEL_MAP 00112 { { 0, 1, 2, 3, }, { 0, 1, 3, 4, 2, } }, 00113 { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 4, 5, 3 } }, 00114 }; 00115 00120 const uint8_t ff_ac3_dec_channel_map[8][2][6] = { 00121 COMMON_CHANNEL_MAP 00122 { { 0, 1, 2, 3, }, { 0, 1, 4, 2, 3, } }, 00123 { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 5, 3, 4 } }, 00124 }; 00125 00126 /* possible frequencies */ 00127 const uint16_t ff_ac3_sample_rate_tab[3] = { 48000, 44100, 32000 }; 00128 00129 /* possible bitrates */ 00130 const uint16_t ff_ac3_bitrate_tab[19] = { 00131 32, 40, 48, 56, 64, 80, 96, 112, 128, 00132 160, 192, 224, 256, 320, 384, 448, 512, 576, 640 00133 }; 00134 00139 const uint8_t ff_ac3_rematrix_band_tab[5] = { 13, 25, 37, 61, 253 }; 00140 00144 const uint8_t ff_eac3_default_cpl_band_struct[18] = { 00145 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1 00146 }; 00147 00148 /* AC-3 MDCT window */ 00149 00150 /* MDCT window */ 00151 DECLARE_ALIGNED(16, const int16_t, ff_ac3_window)[AC3_WINDOW_SIZE/2] = { 00152 4, 7, 12, 16, 21, 28, 34, 42, 00153 51, 61, 72, 84, 97, 111, 127, 145, 00154 164, 184, 207, 231, 257, 285, 315, 347, 00155 382, 419, 458, 500, 544, 591, 641, 694, 00156 750, 810, 872, 937, 1007, 1079, 1155, 1235, 00157 1318, 1406, 1497, 1593, 1692, 1796, 1903, 2016, 00158 2132, 2253, 2379, 2509, 2644, 2783, 2927, 3076, 00159 3230, 3389, 3552, 3721, 3894, 4072, 4255, 4444, 00160 4637, 4835, 5038, 5246, 5459, 5677, 5899, 6127, 00161 6359, 6596, 6837, 7083, 7334, 7589, 7848, 8112, 00162 8380, 8652, 8927, 9207, 9491, 9778,10069,10363, 00163 10660,10960,11264,11570,11879,12190,12504,12820, 00164 13138,13458,13780,14103,14427,14753,15079,15407, 00165 15735,16063,16392,16720,17049,17377,17705,18032, 00166 18358,18683,19007,19330,19651,19970,20287,20602, 00167 20914,21225,21532,21837,22139,22438,22733,23025, 00168 23314,23599,23880,24157,24430,24699,24964,25225, 00169 25481,25732,25979,26221,26459,26691,26919,27142, 00170 27359,27572,27780,27983,28180,28373,28560,28742, 00171 28919,29091,29258,29420,29577,29729,29876,30018, 00172 30155,30288,30415,30538,30657,30771,30880,30985, 00173 31086,31182,31274,31363,31447,31528,31605,31678, 00174 31747,31814,31877,31936,31993,32046,32097,32145, 00175 32190,32232,32272,32310,32345,32378,32409,32438, 00176 32465,32490,32513,32535,32556,32574,32592,32608, 00177 32623,32636,32649,32661,32671,32681,32690,32698, 00178 32705,32712,32718,32724,32729,32733,32737,32741, 00179 32744,32747,32750,32752,32754,32756,32757,32759, 00180 32760,32761,32762,32763,32764,32764,32765,32765, 00181 32766,32766,32766,32766,32767,32767,32767,32767, 00182 32767,32767,32767,32767,32767,32767,32767,32767, 00183 32767,32767,32767,32767,32767,32767,32767,32767, 00184 }; 00185 00186 const uint8_t ff_ac3_log_add_tab[260]= { 00187 0x40,0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x37, 00188 0x36,0x35,0x34,0x34,0x33,0x32,0x31,0x30,0x2f,0x2f, 00189 0x2e,0x2d,0x2c,0x2c,0x2b,0x2a,0x29,0x29,0x28,0x27, 00190 0x26,0x26,0x25,0x24,0x24,0x23,0x23,0x22,0x21,0x21, 00191 0x20,0x20,0x1f,0x1e,0x1e,0x1d,0x1d,0x1c,0x1c,0x1b, 00192 0x1b,0x1a,0x1a,0x19,0x19,0x18,0x18,0x17,0x17,0x16, 00193 0x16,0x15,0x15,0x15,0x14,0x14,0x13,0x13,0x13,0x12, 00194 0x12,0x12,0x11,0x11,0x11,0x10,0x10,0x10,0x0f,0x0f, 00195 0x0f,0x0e,0x0e,0x0e,0x0d,0x0d,0x0d,0x0d,0x0c,0x0c, 00196 0x0c,0x0c,0x0b,0x0b,0x0b,0x0b,0x0a,0x0a,0x0a,0x0a, 00197 0x0a,0x09,0x09,0x09,0x09,0x09,0x08,0x08,0x08,0x08, 00198 0x08,0x08,0x07,0x07,0x07,0x07,0x07,0x07,0x06,0x06, 00199 0x06,0x06,0x06,0x06,0x06,0x06,0x05,0x05,0x05,0x05, 00200 0x05,0x05,0x05,0x05,0x04,0x04,0x04,0x04,0x04,0x04, 00201 0x04,0x04,0x04,0x04,0x04,0x03,0x03,0x03,0x03,0x03, 00202 0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02, 00203 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02, 00204 0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x01,0x01, 00205 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01, 00206 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01, 00207 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01, 00208 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 00209 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 00210 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 00211 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 00212 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 00213 }; 00214 00215 const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3]= { 00216 { 0x04d0,0x04f0,0x0580 }, 00217 { 0x04d0,0x04f0,0x0580 }, 00218 { 0x0440,0x0460,0x04b0 }, 00219 { 0x0400,0x0410,0x0450 }, 00220 { 0x03e0,0x03e0,0x0420 }, 00221 { 0x03c0,0x03d0,0x03f0 }, 00222 { 0x03b0,0x03c0,0x03e0 }, 00223 { 0x03b0,0x03b0,0x03d0 }, 00224 { 0x03a0,0x03b0,0x03c0 }, 00225 { 0x03a0,0x03a0,0x03b0 }, 00226 { 0x03a0,0x03a0,0x03b0 }, 00227 { 0x03a0,0x03a0,0x03b0 }, 00228 { 0x03a0,0x03a0,0x03a0 }, 00229 { 0x0390,0x03a0,0x03a0 }, 00230 { 0x0390,0x0390,0x03a0 }, 00231 { 0x0390,0x0390,0x03a0 }, 00232 { 0x0380,0x0390,0x03a0 }, 00233 { 0x0380,0x0380,0x03a0 }, 00234 { 0x0370,0x0380,0x03a0 }, 00235 { 0x0370,0x0380,0x03a0 }, 00236 { 0x0360,0x0370,0x0390 }, 00237 { 0x0360,0x0370,0x0390 }, 00238 { 0x0350,0x0360,0x0390 }, 00239 { 0x0350,0x0360,0x0390 }, 00240 { 0x0340,0x0350,0x0380 }, 00241 { 0x0340,0x0350,0x0380 }, 00242 { 0x0330,0x0340,0x0380 }, 00243 { 0x0320,0x0340,0x0370 }, 00244 { 0x0310,0x0320,0x0360 }, 00245 { 0x0300,0x0310,0x0350 }, 00246 { 0x02f0,0x0300,0x0340 }, 00247 { 0x02f0,0x02f0,0x0330 }, 00248 { 0x02f0,0x02f0,0x0320 }, 00249 { 0x02f0,0x02f0,0x0310 }, 00250 { 0x0300,0x02f0,0x0300 }, 00251 { 0x0310,0x0300,0x02f0 }, 00252 { 0x0340,0x0320,0x02f0 }, 00253 { 0x0390,0x0350,0x02f0 }, 00254 { 0x03e0,0x0390,0x0300 }, 00255 { 0x0420,0x03e0,0x0310 }, 00256 { 0x0460,0x0420,0x0330 }, 00257 { 0x0490,0x0450,0x0350 }, 00258 { 0x04a0,0x04a0,0x03c0 }, 00259 { 0x0460,0x0490,0x0410 }, 00260 { 0x0440,0x0460,0x0470 }, 00261 { 0x0440,0x0440,0x04a0 }, 00262 { 0x0520,0x0480,0x0460 }, 00263 { 0x0800,0x0630,0x0440 }, 00264 { 0x0840,0x0840,0x0450 }, 00265 { 0x0840,0x0840,0x04e0 }, 00266 }; 00267 00268 const uint8_t ff_ac3_bap_tab[64]= { 00269 0, 1, 1, 1, 1, 1, 2, 2, 3, 3, 00270 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 00271 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 00272 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 00273 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 00274 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 00275 15, 15, 15, 15, 00276 }; 00277 00278 const uint8_t ff_ac3_slow_decay_tab[4]={ 00279 0x0f, 0x11, 0x13, 0x15, 00280 }; 00281 00282 const uint8_t ff_ac3_fast_decay_tab[4]={ 00283 0x3f, 0x53, 0x67, 0x7b, 00284 }; 00285 00286 const uint16_t ff_ac3_slow_gain_tab[4]= { 00287 0x540, 0x4d8, 0x478, 0x410, 00288 }; 00289 00290 const uint16_t ff_ac3_db_per_bit_tab[4]= { 00291 0x000, 0x700, 0x900, 0xb00, 00292 }; 00293 00294 const int16_t ff_ac3_floor_tab[8]= { 00295 0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800, 00296 }; 00297 00298 const uint16_t ff_ac3_fast_gain_tab[8]= { 00299 0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400, 00300 }; 00301 00305 const uint16_t ff_eac3_default_chmap[8] = { 00306 AC3_CHMAP_L | AC3_CHMAP_R, // FIXME Ch1+Ch2 00307 AC3_CHMAP_C, 00308 AC3_CHMAP_L | AC3_CHMAP_R, 00309 AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R, 00310 AC3_CHMAP_L | AC3_CHMAP_R | AC3_CHMAP_C_SUR, 00311 AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R | AC3_CHMAP_C_SUR, 00312 AC3_CHMAP_L | AC3_CHMAP_R | AC3_CHMAP_L_SUR | AC3_CHMAP_R_SUR, 00313 AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R | AC3_CHMAP_L_SUR | AC3_CHMAP_R_SUR 00314 };