FreeCalypso > hg > themwi-system-sw
view mgw/dtmf_table.c @ 137:f05183b18d29
top Makefile: add liboutrt
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 06 Oct 2022 23:59:17 -0800 |
parents | 815e4c59162e |
children |
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/* * This module holds the table of all possible DTMF tones we can generate. */ #include <math.h> #include <stdint.h> #include "dtmf_defs.h" #define FREQ_697 (M_PI * 697.0 / 4000.0) #define FREQ_770 (M_PI * 770.0 / 4000.0) #define FREQ_852 (M_PI * 852.0 / 4000.0) #define FREQ_941 (M_PI * 941.0 / 4000.0) #define FREQ_1209 (M_PI * 1209.0 / 4000.0) #define FREQ_1336 (M_PI * 1336.0 / 4000.0) #define FREQ_1477 (M_PI * 1477.0 / 4000.0) #define FREQ_1633 (M_PI * 1633.0 / 4000.0) struct dtmf_desc dtmf_table[] = { {'1', FREQ_697, FREQ_1209}, {'2', FREQ_697, FREQ_1336}, {'3', FREQ_697, FREQ_1477}, {'A', FREQ_697, FREQ_1633}, {'4', FREQ_770, FREQ_1209}, {'5', FREQ_770, FREQ_1336}, {'6', FREQ_770, FREQ_1477}, {'B', FREQ_770, FREQ_1633}, {'7', FREQ_852, FREQ_1209}, {'8', FREQ_852, FREQ_1336}, {'9', FREQ_852, FREQ_1477}, {'C', FREQ_852, FREQ_1633}, {'*', FREQ_941, FREQ_1209}, {'0', FREQ_941, FREQ_1336}, {'#', FREQ_941, FREQ_1477}, {'D', FREQ_941, FREQ_1633}, /* table search terminator */ {0, 0, 0} };