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annotate libtwamr/lsp_lsf.tab @ 458:e26b974f7ba3

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doc/AMR-study-utils: update for the current situation
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 18:45:36 +0000
parents 05a46720af0f
children
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05a46720af0f libtwamr: integrate d_plsf_3.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : lsp_lsf.tab
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11 * Purpose : Tables for function Lsf_lsp() and Lsp_lsf()
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12 * $Id $
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13 *
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14 ********************************************************************************
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15 */
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16 /* table of cos(x) */
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17
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18 static const Word16 table[65] =
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19 {
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20 32767, 32729, 32610, 32413, 32138, 31786, 31357, 30853,
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21 30274, 29622, 28899, 28106, 27246, 26320, 25330, 24279,
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22 23170, 22006, 20788, 19520, 18205, 16846, 15447, 14010,
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23 12540, 11039, 9512, 7962, 6393, 4808, 3212, 1608,
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24 0, -1608, -3212, -4808, -6393, -7962, -9512, -11039,
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25 -12540, -14010, -15447, -16846, -18205, -19520, -20788, -22006,
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26 -23170, -24279, -25330, -26320, -27246, -28106, -28899, -29622,
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27 -30274, -30853, -31357, -31786, -32138, -32413, -32610, -32729,
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28 (Word16) 0x8000
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29 };
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30
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31 /* 0x8000 = -32768 (used to silence the compiler) */
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32
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33 /* slope used to compute y = acos(x) */
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34
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35 static const Word16 slope[64] =
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36 {
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37 -26887, -8812, -5323, -3813, -2979, -2444, -2081, -1811,
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38 -1608, -1450, -1322, -1219, -1132, -1059, -998, -946,
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39 -901, -861, -827, -797, -772, -750, -730, -713,
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40 -699, -687, -677, -668, -662, -657, -654, -652,
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41 -652, -654, -657, -662, -668, -677, -687, -699,
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42 -713, -730, -750, -772, -797, -827, -861, -901,
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43 -946, -998, -1059, -1132, -1219, -1322, -1450, -1608,
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44 -1811, -2081, -2444, -2979, -3813, -5323, -8812, -26887
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45 };