FreeCalypso > hg > freecalypso-tools

annotate tchtools/fc-fr2tch.c @ 1012:11391cb6bdc0

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patch from fixeria: doc change from SE K2x0 to K2xx Since their discovery in late 2022, Sony Ericsson K200 and K220 phones were collectively referred to as SE K2x0 in FreeCalypso documentation. However, now that SE K205 has been discovered as yet another member of the same family (same PCBA in different case), it makes more sense to refer to the whole family as SE K2xx.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 23 Sep 2024 12:23:20 +0000
parents 8ddb16a37273
children
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5
7eaa3307e5df fc-fr2tch utility written, added under miscutil
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1 /*
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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
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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>
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10 #include <stdio.h>
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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;
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38 if ((libgsm_bytes[0] & 0xF0) != 0xD0) {
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39 invalid: fprintf(stderr, "error: %s is not in libgsm format\n",
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40 argv[1]);
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41 exit(1);
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42 }
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43 gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes);
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44 for (i = 0; i < 33; i++)
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45 fprintf(outf, "%02X", tidsp_bytes[i]);
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46 putc('\n', outf);
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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 }