FreeCalypso > hg > themwi-system-sw

annotate mgw/dtmf_table.c @ 145:4b685a5d9bd4

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sip-in code: split invite.c into 3 separate C modules
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Oct 2022 19:31:05 -0800
parents 815e4c59162e
children
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815e4c59162e mgw DTMF: tone definitions and sample array generation
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
815e4c59162e mgw DTMF: tone definitions and sample array generation
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2 * This module holds the table of all possible DTMF tones we can generate.
815e4c59162e mgw DTMF: tone definitions and sample array generation
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3 */
815e4c59162e mgw DTMF: tone definitions and sample array generation
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4
815e4c59162e mgw DTMF: tone definitions and sample array generation
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5 #include <math.h>
815e4c59162e mgw DTMF: tone definitions and sample array generation
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6 #include <stdint.h>
815e4c59162e mgw DTMF: tone definitions and sample array generation
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7 #include "dtmf_defs.h"
815e4c59162e mgw DTMF: tone definitions and sample array generation
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8
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9 #define FREQ_697 (M_PI * 697.0 / 4000.0)
815e4c59162e mgw DTMF: tone definitions and sample array generation
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10 #define FREQ_770 (M_PI * 770.0 / 4000.0)
815e4c59162e mgw DTMF: tone definitions and sample array generation
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11 #define FREQ_852 (M_PI * 852.0 / 4000.0)
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12 #define FREQ_941 (M_PI * 941.0 / 4000.0)
815e4c59162e mgw DTMF: tone definitions and sample array generation
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13 #define FREQ_1209 (M_PI * 1209.0 / 4000.0)
815e4c59162e mgw DTMF: tone definitions and sample array generation
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14 #define FREQ_1336 (M_PI * 1336.0 / 4000.0)
815e4c59162e mgw DTMF: tone definitions and sample array generation
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15 #define FREQ_1477 (M_PI * 1477.0 / 4000.0)
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16 #define FREQ_1633 (M_PI * 1633.0 / 4000.0)
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17
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18 struct dtmf_desc dtmf_table[] = {
815e4c59162e mgw DTMF: tone definitions and sample array generation
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19 {'1', FREQ_697, FREQ_1209},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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20 {'2', FREQ_697, FREQ_1336},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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21 {'3', FREQ_697, FREQ_1477},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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22 {'A', FREQ_697, FREQ_1633},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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23 {'4', FREQ_770, FREQ_1209},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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24 {'5', FREQ_770, FREQ_1336},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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25 {'6', FREQ_770, FREQ_1477},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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26 {'B', FREQ_770, FREQ_1633},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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27 {'7', FREQ_852, FREQ_1209},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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28 {'8', FREQ_852, FREQ_1336},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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29 {'9', FREQ_852, FREQ_1477},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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30 {'C', FREQ_852, FREQ_1633},
815e4c59162e mgw DTMF: tone definitions and sample array generation
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31 {'*', FREQ_941, FREQ_1209},
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32 {'0', FREQ_941, FREQ_1336},
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33 {'#', FREQ_941, FREQ_1477},
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34 {'D', FREQ_941, FREQ_1633},
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35 /* table search terminator */
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36 {0, 0, 0}
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37 };