FreeCalypso > hg > freecalypso-tools

annotate miscutil/fc-gsm2vm.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 f736f3ce8310
children
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f736f3ce8310 fc-gsm2vm utility written
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1 /*
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2 * This utility converts a GSM 06.10 speech recording from the format that is
f736f3ce8310 fc-gsm2vm utility written
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3 * commonly accepted as standard in the Unix/Linux world (libgsm format) into
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4 * a voice memo file that can be uploaded into the FFS of a FreeCalypso device
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5 * and played with the audio_vm_play_start() API or the AT@VMP command that
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6 * invokes the latter.
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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[34], arm_bytes[34];
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18 static u_char header_bytes[6] = {0x00, 0xC4, 0x00, 0x00, 0x00, 0x00};
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19 static u_char endmarker[2] = {0xFF, 0xFB};
f736f3ce8310 fc-gsm2vm utility written
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20 int cc, i, gotsome = 0;
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21
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22 if (argc != 3) {
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23 fprintf(stderr, "usage: %s infile outfile\n", argv[0]);
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24 exit(1);
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25 }
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26 inf = fopen(argv[1], "r");
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27 if (!inf) {
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28 perror(argv[1]);
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29 exit(1);
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30 }
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31 outf = fopen(argv[2], "w");
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32 if (!outf) {
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33 perror(argv[2]);
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34 exit(1);
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35 }
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36 tidsp_bytes[33] = 0;
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37 for (;;) {
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38 cc = fread(libgsm_bytes, 1, 33, inf);
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39 if (cc < 33)
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40 break;
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41 if ((libgsm_bytes[0] & 0xF0) != 0xD0) {
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42 invalid: fprintf(stderr, "error: %s is not in libgsm format\n",
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43 argv[1]);
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44 exit(1);
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45 }
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46 gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes);
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47 for (i = 0; i < 34; i += 2) {
f736f3ce8310 fc-gsm2vm utility written
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48 arm_bytes[i] = tidsp_bytes[i+1];
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49 arm_bytes[i+1] = tidsp_bytes[i];
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50 }
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51 fwrite(header_bytes, 1, 6, outf);
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52 fwrite(arm_bytes, 1, 34, outf);
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53 gotsome = 1;
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54 }
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55 fwrite(endmarker, 1, 2, outf);
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56 fclose(outf);
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57 if (cc) {
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58 if (gotsome)
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59 fprintf(stderr,
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60 "warning: extra non-33 bytes at the end of %s\n",
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61 argv[1]);
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62 else
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63 goto invalid;
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64 }
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65 exit(0);
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66 }