FreeCalypso > hg > freecalypso-tools

annotate miscutil/fc-fr2tch.c @ 416:30f6d1c32c6f

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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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5
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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1 /*
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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2 * This utility converts a GSM 06.10 speech recording from the format that is
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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3 * commonly accepted as standard in the Unix/Linux world (libgsm format) into
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4 * hex strings of TCH bits to be fed to the GSM 05.03 channel encoder by way
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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5 * of a TI Calypso GSM device, a FreeCalypso GSM firmware version with the
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6 * TCH rerouting feature, and fc-shell's tch play command.
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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7 */
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8
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9 #include <sys/types.h>
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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10 #include <stdio.h>
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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11 #include <stdlib.h>
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12
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13 main(argc, argv)
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14 char **argv;
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15 {
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16 FILE *inf, *outf;
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17 u_char libgsm_bytes[33], tidsp_bytes[33];
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18 int cc, i, gotsome = 0;
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19
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20 if (argc != 3) {
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21 fprintf(stderr, "usage: %s infile outfile\n", argv[0]);
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22 exit(1);
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23 }
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24 inf = fopen(argv[1], "r");
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25 if (!inf) {
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26 perror(argv[1]);
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27 exit(1);
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28 }
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29 outf = fopen(argv[2], "w");
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30 if (!outf) {
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31 perror(argv[2]);
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32 exit(1);
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33 }
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34 for (;;) {
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35 cc = fread(libgsm_bytes, 1, 33, inf);
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36 if (cc < 33)
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37 break;
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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38 if ((libgsm_bytes[0] & 0xF0) != 0xD0) {
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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39 invalid: fprintf(stderr, "error: %s is not in libgsm format\n",
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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40 argv[1]);
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41 exit(1);
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42 }
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Mychaela Falconia <falcon@freecalypso.org>
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43 gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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44 for (i = 0; i < 33; i++)
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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45 fprintf(outf, "%02X", tidsp_bytes[i]);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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46 putc('\n', outf);
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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47 gotsome = 1;
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48 }
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49 fclose(outf);
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50 if (cc) {
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51 if (gotsome)
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52 fprintf(stderr,
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53 "warning: extra non-33 bytes at the end of %s\n",
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54 argv[1]);
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55 else
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56 goto invalid;
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57 }
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58 exit(0);
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59 }