FreeCalypso > hg > vband-misc
view dmw/gen-dmw-bin.c @ 57:a64e5ed217c0 default tip
top Makefile: add fr-sid
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 22 Aug 2024 06:43:31 +0000 |
parents | e81a8c274fa6 |
children |
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/* * This program generates a binary G.711 file containing the standard * DMW (digital milliwatt) sequence repeated for the specified number * of times; the number of repetitions will be the total duration * of the output in milliseconds. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> static uint8_t dmw_alaw[8] = {0x34, 0x21, 0x21, 0x34, 0xB4, 0xA1, 0xA1, 0xB4}; static uint8_t dmw_ulaw[8] = {0x1E, 0x0B, 0x0B, 0x1E, 0x9E, 0x8B, 0x8B, 0x9E}; main(argc, argv) char **argv; { FILE *outf; unsigned total_ms, n; uint8_t *seq; if (argc != 4) { usage: fprintf(stderr, "usage: outfile alaw|ulaw number-of-ms\n", argv[0]); exit(1); } outf = fopen(argv[1], "w"); if (!outf) { perror(argv[1]); exit(1); } if (!strcmp(argv[2], "alaw")) seq = dmw_alaw; else if (!strcmp(argv[2], "ulaw")) seq = dmw_ulaw; else goto usage; total_ms = atoi(argv[3]); for (n = 0; n < total_ms; n++) fwrite(seq, 1, 8, outf); exit(0); }