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250 lines
8.1 KiB
C
250 lines
8.1 KiB
C
/*
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* AC3 tables
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* copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file ac3tab.c
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* tables taken directly from AC3 spec.
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*/
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#include "ac3tab.h"
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/**
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* Possible frame sizes.
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* from ATSC A/52 Table 5.18 Frame Size Code Table.
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*/
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const uint16_t ff_ac3_frame_sizes[38][3] = {
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{ 64, 69, 96 },
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{ 64, 70, 96 },
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{ 80, 87, 120 },
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{ 80, 88, 120 },
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{ 96, 104, 144 },
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{ 96, 105, 144 },
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{ 112, 121, 168 },
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{ 112, 122, 168 },
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{ 128, 139, 192 },
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{ 128, 140, 192 },
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{ 160, 174, 240 },
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{ 160, 175, 240 },
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{ 192, 208, 288 },
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{ 192, 209, 288 },
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{ 224, 243, 336 },
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{ 224, 244, 336 },
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{ 256, 278, 384 },
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{ 256, 279, 384 },
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{ 320, 348, 480 },
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{ 320, 349, 480 },
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{ 384, 417, 576 },
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{ 384, 418, 576 },
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{ 448, 487, 672 },
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{ 448, 488, 672 },
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{ 512, 557, 768 },
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{ 512, 558, 768 },
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{ 640, 696, 960 },
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{ 640, 697, 960 },
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{ 768, 835, 1152 },
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{ 768, 836, 1152 },
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{ 896, 975, 1344 },
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{ 896, 976, 1344 },
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{ 1024, 1114, 1536 },
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{ 1024, 1115, 1536 },
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{ 1152, 1253, 1728 },
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{ 1152, 1254, 1728 },
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{ 1280, 1393, 1920 },
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{ 1280, 1394, 1920 },
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};
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/**
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* Maps audio coding mode (acmod) to number of full-bandwidth channels.
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* from ATSC A/52 Table 5.8 Audio Coding Mode
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*/
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const uint8_t ff_ac3_channels[8] = {
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2, 1, 2, 3, 3, 4, 4, 5
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};
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/* possible frequencies */
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const uint16_t ff_ac3_freqs[3] = { 48000, 44100, 32000 };
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/* possible bitrates */
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const uint16_t ff_ac3_bitratetab[19] = {
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32, 40, 48, 56, 64, 80, 96, 112, 128,
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160, 192, 224, 256, 320, 384, 448, 512, 576, 640
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};
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/* AC3 MDCT window */
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/* MDCT window */
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const int16_t ff_ac3_window[256] = {
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4, 7, 12, 16, 21, 28, 34, 42,
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51, 61, 72, 84, 97, 111, 127, 145,
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164, 184, 207, 231, 257, 285, 315, 347,
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382, 419, 458, 500, 544, 591, 641, 694,
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750, 810, 872, 937, 1007, 1079, 1155, 1235,
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1318, 1406, 1497, 1593, 1692, 1796, 1903, 2016,
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2132, 2253, 2379, 2509, 2644, 2783, 2927, 3076,
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3230, 3389, 3552, 3721, 3894, 4072, 4255, 4444,
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4637, 4835, 5038, 5246, 5459, 5677, 5899, 6127,
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6359, 6596, 6837, 7083, 7334, 7589, 7848, 8112,
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8380, 8652, 8927, 9207, 9491, 9778,10069,10363,
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10660,10960,11264,11570,11879,12190,12504,12820,
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13138,13458,13780,14103,14427,14753,15079,15407,
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15735,16063,16392,16720,17049,17377,17705,18032,
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18358,18683,19007,19330,19651,19970,20287,20602,
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20914,21225,21532,21837,22139,22438,22733,23025,
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23314,23599,23880,24157,24430,24699,24964,25225,
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25481,25732,25979,26221,26459,26691,26919,27142,
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27359,27572,27780,27983,28180,28373,28560,28742,
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28919,29091,29258,29420,29577,29729,29876,30018,
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30155,30288,30415,30538,30657,30771,30880,30985,
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31086,31182,31274,31363,31447,31528,31605,31678,
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31747,31814,31877,31936,31993,32046,32097,32145,
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32190,32232,32272,32310,32345,32378,32409,32438,
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32465,32490,32513,32535,32556,32574,32592,32608,
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32623,32636,32649,32661,32671,32681,32690,32698,
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32705,32712,32718,32724,32729,32733,32737,32741,
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32744,32747,32750,32752,32754,32756,32757,32759,
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32760,32761,32762,32763,32764,32764,32765,32765,
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32766,32766,32766,32766,32767,32767,32767,32767,
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32767,32767,32767,32767,32767,32767,32767,32767,
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32767,32767,32767,32767,32767,32767,32767,32767,
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};
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const uint8_t ff_ac3_latab[260]= {
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0x0040,0x003f,0x003e,0x003d,0x003c,0x003b,0x003a,0x0039,0x0038,0x0037,
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0x0036,0x0035,0x0034,0x0034,0x0033,0x0032,0x0031,0x0030,0x002f,0x002f,
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0x002e,0x002d,0x002c,0x002c,0x002b,0x002a,0x0029,0x0029,0x0028,0x0027,
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0x0026,0x0026,0x0025,0x0024,0x0024,0x0023,0x0023,0x0022,0x0021,0x0021,
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0x0020,0x0020,0x001f,0x001e,0x001e,0x001d,0x001d,0x001c,0x001c,0x001b,
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0x001b,0x001a,0x001a,0x0019,0x0019,0x0018,0x0018,0x0017,0x0017,0x0016,
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0x0016,0x0015,0x0015,0x0015,0x0014,0x0014,0x0013,0x0013,0x0013,0x0012,
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0x0012,0x0012,0x0011,0x0011,0x0011,0x0010,0x0010,0x0010,0x000f,0x000f,
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0x000f,0x000e,0x000e,0x000e,0x000d,0x000d,0x000d,0x000d,0x000c,0x000c,
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0x000c,0x000c,0x000b,0x000b,0x000b,0x000b,0x000a,0x000a,0x000a,0x000a,
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0x000a,0x0009,0x0009,0x0009,0x0009,0x0009,0x0008,0x0008,0x0008,0x0008,
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0x0008,0x0008,0x0007,0x0007,0x0007,0x0007,0x0007,0x0007,0x0006,0x0006,
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0x0006,0x0006,0x0006,0x0006,0x0006,0x0006,0x0005,0x0005,0x0005,0x0005,
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0x0005,0x0005,0x0005,0x0005,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004,
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0x0004,0x0004,0x0004,0x0004,0x0004,0x0003,0x0003,0x0003,0x0003,0x0003,
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0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0002,
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0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,
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0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0001,0x0001,
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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};
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const uint16_t ff_ac3_hth[50][3]= {
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{ 0x04d0,0x04f0,0x0580 },
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{ 0x04d0,0x04f0,0x0580 },
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{ 0x0440,0x0460,0x04b0 },
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{ 0x0400,0x0410,0x0450 },
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{ 0x03e0,0x03e0,0x0420 },
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{ 0x03c0,0x03d0,0x03f0 },
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{ 0x03b0,0x03c0,0x03e0 },
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{ 0x03b0,0x03b0,0x03d0 },
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{ 0x03a0,0x03b0,0x03c0 },
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{ 0x03a0,0x03a0,0x03b0 },
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{ 0x03a0,0x03a0,0x03b0 },
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{ 0x03a0,0x03a0,0x03b0 },
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{ 0x03a0,0x03a0,0x03a0 },
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{ 0x0390,0x03a0,0x03a0 },
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{ 0x0390,0x0390,0x03a0 },
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{ 0x0390,0x0390,0x03a0 },
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{ 0x0380,0x0390,0x03a0 },
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{ 0x0380,0x0380,0x03a0 },
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{ 0x0370,0x0380,0x03a0 },
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{ 0x0370,0x0380,0x03a0 },
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{ 0x0360,0x0370,0x0390 },
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{ 0x0360,0x0370,0x0390 },
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{ 0x0350,0x0360,0x0390 },
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{ 0x0350,0x0360,0x0390 },
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{ 0x0340,0x0350,0x0380 },
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{ 0x0340,0x0350,0x0380 },
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{ 0x0330,0x0340,0x0380 },
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{ 0x0320,0x0340,0x0370 },
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{ 0x0310,0x0320,0x0360 },
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{ 0x0300,0x0310,0x0350 },
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{ 0x02f0,0x0300,0x0340 },
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{ 0x02f0,0x02f0,0x0330 },
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{ 0x02f0,0x02f0,0x0320 },
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{ 0x02f0,0x02f0,0x0310 },
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{ 0x0300,0x02f0,0x0300 },
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{ 0x0310,0x0300,0x02f0 },
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{ 0x0340,0x0320,0x02f0 },
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{ 0x0390,0x0350,0x02f0 },
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{ 0x03e0,0x0390,0x0300 },
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{ 0x0420,0x03e0,0x0310 },
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{ 0x0460,0x0420,0x0330 },
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{ 0x0490,0x0450,0x0350 },
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{ 0x04a0,0x04a0,0x03c0 },
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{ 0x0460,0x0490,0x0410 },
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{ 0x0440,0x0460,0x0470 },
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{ 0x0440,0x0440,0x04a0 },
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{ 0x0520,0x0480,0x0460 },
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{ 0x0800,0x0630,0x0440 },
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{ 0x0840,0x0840,0x0450 },
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{ 0x0840,0x0840,0x04e0 },
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};
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const uint8_t ff_ac3_baptab[64]= {
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0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
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3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
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7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
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9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
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12, 12, 12, 13, 13, 13, 13, 14, 14, 14,
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14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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15, 15, 15, 15,
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};
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const uint8_t ff_sdecaytab[4]={
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0x0f, 0x11, 0x13, 0x15,
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};
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const uint8_t ff_fdecaytab[4]={
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0x3f, 0x53, 0x67, 0x7b,
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};
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const uint16_t ff_sgaintab[4]= {
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0x540, 0x4d8, 0x478, 0x410,
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};
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const uint16_t ff_dbkneetab[4]= {
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0x000, 0x700, 0x900, 0xb00,
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};
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const int16_t ff_floortab[8]= {
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0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
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};
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const uint16_t ff_fgaintab[8]= {
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0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
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};
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const uint8_t ff_ac3_bndsz[50]={
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
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3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24
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};
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