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annotate dmw/gen-dmw-bin.c @ 13:871e83f0cb76

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utils: gen-hex-c utility written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 Apr 2024 19:41:03 +0000
parents e81a8c274fa6
children
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7
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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2 * This program generates a binary G.711 file containing the standard
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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3 * DMW (digital milliwatt) sequence repeated for the specified number
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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4 * of times; the number of repetitions will be the total duration
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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5 * of the output in milliseconds.
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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6 */
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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7
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
Mychaela Falconia <falcon@freecalypso.org>
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8 #include <stdio.h>
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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9 #include <stdint.h>
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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10 #include <stdlib.h>
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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11 #include <string.h>
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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12 #include <strings.h>
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13
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
Mychaela Falconia <falcon@freecalypso.org>
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14 static uint8_t dmw_alaw[8] = {0x34, 0x21, 0x21, 0x34, 0xB4, 0xA1, 0xA1, 0xB4};
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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15 static uint8_t dmw_ulaw[8] = {0x1E, 0x0B, 0x0B, 0x1E, 0x9E, 0x8B, 0x8B, 0x9E};
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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16
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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17 main(argc, argv)
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18 char **argv;
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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19 {
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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20 FILE *outf;
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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21 unsigned total_ms, n;
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22 uint8_t *seq;
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23
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24 if (argc != 4) {
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25 usage: fprintf(stderr, "usage: outfile alaw|ulaw number-of-ms\n",
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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26 argv[0]);
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27 exit(1);
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28 }
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29 outf = fopen(argv[1], "w");
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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30 if (!outf) {
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31 perror(argv[1]);
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32 exit(1);
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33 }
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34 if (!strcmp(argv[2], "alaw"))
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35 seq = dmw_alaw;
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36 else if (!strcmp(argv[2], "ulaw"))
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37 seq = dmw_ulaw;
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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38 else
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39 goto usage;
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40 total_ms = atoi(argv[3]);
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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41 for (n = 0; n < total_ms; n++)
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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42 fwrite(seq, 1, 8, outf);
e81a8c274fa6 dmw: generate G.711 digital mW and convert both versions to robe
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43 exit(0);
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44 }