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annotate libtwamr/gains_tab.c @ 485:751f06541fbb

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doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:47:22 +0000
parents 5db2c920fc23
children
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5db2c920fc23 libtwamr: gains.tab integrated
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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 : gains.tab
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11 * Purpose : Scalar quantization tables of the pitch gain and
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12 * : the codebook gain.
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13 * $Id $
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14 *
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15 ********************************************************************************
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16 */
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17
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18 #include "namespace.h"
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19 #include "typedef.h"
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20 #include "gains_tab.h"
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21
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22 const Word16 qua_gain_pitch[NB_QUA_PITCH] =
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23 {
5db2c920fc23 libtwamr: gains.tab integrated
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24 0, 3277, 6556, 8192, 9830, 11469, 12288, 13107,
5db2c920fc23 libtwamr: gains.tab integrated
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25 13926, 14746, 15565, 16384, 17203, 18022, 18842, 19661
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26 };
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27
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28 const Word16 qua_gain_code[NB_QUA_CODE*3] =
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29 {
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30 /* gain factor (g_fac) and quantized energy error (qua_ener_MR122, qua_ener)
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31 * are stored:
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32 *
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33 * qua_ener_MR122 = log2(g_fac) (not the rounded floating point value, but
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34 * the value the original EFR algorithm
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35 * calculates from g_fac [using Log2])
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36 * qua_ener = 20*log10(g_fac); (rounded floating point value)
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37 *
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38 *
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39 * g_fac (Q11), qua_ener_MR122 (Q10), qua_ener (Q10)
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40 */
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41 159, -3776, -22731,
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42 206, -3394, -20428,
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43 268, -3005, -18088,
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44 349, -2615, -15739,
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45 419, -2345, -14113,
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47 554, -1932, -11629,
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73 };