FreeCalypso > hg > freecalypso-tools
view miscutil/fc-fr2tch.c @ 416:30f6d1c32c6f
doc/Flash-boot-defect article removed (no longer relevant)
This article is no longer relevant because the issue in question
only affected one (1) defective FCDEV3B board which was not
and never will be sold.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 26 Oct 2018 07:11:08 +0000 |
parents | 7eaa3307e5df |
children |
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/* * This utility converts a GSM 06.10 speech recording from the format that is * commonly accepted as standard in the Unix/Linux world (libgsm format) into * hex strings of TCH bits to be fed to the GSM 05.03 channel encoder by way * of a TI Calypso GSM device, a FreeCalypso GSM firmware version with the * TCH rerouting feature, and fc-shell's tch play command. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> main(argc, argv) char **argv; { FILE *inf, *outf; u_char libgsm_bytes[33], tidsp_bytes[33]; int cc, i, gotsome = 0; if (argc != 3) { fprintf(stderr, "usage: %s infile outfile\n", argv[0]); exit(1); } inf = fopen(argv[1], "r"); if (!inf) { perror(argv[1]); exit(1); } outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } for (;;) { cc = fread(libgsm_bytes, 1, 33, inf); if (cc < 33) break; if ((libgsm_bytes[0] & 0xF0) != 0xD0) { invalid: fprintf(stderr, "error: %s is not in libgsm format\n", argv[1]); exit(1); } gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes); for (i = 0; i < 33; i++) fprintf(outf, "%02X", tidsp_bytes[i]); putc('\n', outf); gotsome = 1; } fclose(outf); if (cc) { if (gotsome) fprintf(stderr, "warning: extra non-33 bytes at the end of %s\n", argv[1]); else goto invalid; } exit(0); }