FreeCalypso > hg > gsm-codec-lib
annotate frtest/dlcap-gsmx.c @ 372:9cca139a20a8
libtwamr: integrate q_plsf_3.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 06 May 2024 04:00:14 +0000 |
parents | 6e39fc0134da |
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rev | line source |
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1 /* |
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2 * This program reads a TCH/FS downlink capture produced with FreeCalypso tools |
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3 * (fw version with TCH downlink sniffing feature and fc-shell tch record) |
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4 * and converts it into our extended-libgsm binary format, to be further |
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5 * fed to gsmfr-decode. |
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6 */ |
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7 |
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8 #include <ctype.h> |
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9 #include <stdio.h> |
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10 #include <stdint.h> |
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11 #include <stdlib.h> |
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12 #include <string.h> |
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13 #include <strings.h> |
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14 |
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15 main(argc, argv) |
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16 char **argv; |
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17 { |
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18 FILE *inf, *outf; |
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19 char linebuf[128]; |
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20 int lineno, rc; |
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21 uint16_t status_words[3]; |
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22 uint8_t tidsp_bytes[33], libgsm_bytes[33], bfi[2]; |
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23 unsigned fn_mod_104; |
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24 |
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25 if (argc != 3) { |
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26 fprintf(stderr, "usage: %s infile outfile\n", argv[0]); |
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27 exit(1); |
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28 } |
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29 inf = fopen(argv[1], "r"); |
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30 if (!inf) { |
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31 perror(argv[1]); |
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32 exit(1); |
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33 } |
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34 outf = fopen(argv[2], "w"); |
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35 if (!outf) { |
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36 perror(argv[2]); |
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37 exit(1); |
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38 } |
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39 for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) { |
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40 /* support both old and new formats */ |
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41 if (isxdigit(linebuf[0]) && isxdigit(linebuf[1]) && |
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42 isxdigit(linebuf[2]) && isxdigit(linebuf[3])) { |
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43 rc = parse_dlcap_common(linebuf, status_words, |
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44 tidsp_bytes); |
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45 if (rc < 0) { |
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46 invalid: fprintf(stderr, |
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47 "error: %s is not in the expected format\n", |
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48 argv[1]); |
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49 exit(1); |
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50 } |
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51 fn_mod_104 = 0; /* won't have TAF */ |
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52 } else if (!strncmp(linebuf, "FR ", 3)) { |
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53 rc = parse_dlcap_common(linebuf + 3, status_words, |
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54 tidsp_bytes); |
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55 if (rc < 0) |
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56 goto invalid; |
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57 if (linebuf[84] != ' ') |
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58 goto invalid; |
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59 if (!isdigit(linebuf[85])) |
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60 goto invalid; |
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61 fn_mod_104 = strtoul(linebuf + 85, 0, 10); |
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62 } else |
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63 goto invalid; |
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64 /* |
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65 * DSP flags are documented in the TCH-tap-modes article |
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66 * in freecalypso-docs. |
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67 */ |
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68 if ((status_words[0] & 0xC004) == 0xC000) { |
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69 gsm0610_tidsp_to_libgsm(tidsp_bytes, libgsm_bytes); |
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70 fwrite(libgsm_bytes, 1, 33, outf); |
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71 } else { |
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72 bfi[0] = 0xBF; |
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73 bfi[1] = fn_mod_104 == 60; |
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74 fwrite(bfi, 1, 2, outf); |
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75 } |
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76 } |
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77 exit(0); |
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78 } |