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annotate frtest/cod2std.c @ 485:751f06541fbb

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doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:47:22 +0000
parents 25649b3a83e9
children
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1 /*
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2 * This program reads an FR codec parameters file in ETSI *.cod test sequence
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3 * format and converts it into classic libgsm format.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "../libgsmfr2/tw_gsmfr.h"
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12
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13 static void
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14 bytes_to_params(bytes, params, big_endian)
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15 uint8_t *bytes;
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16 int16_t *params;
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17 {
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18 uint8_t *sp;
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19 unsigned n;
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20 uint16_t val;
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21
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22 sp = bytes;
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23 for (n = 0; n < 76; n++) {
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24 if (big_endian)
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25 val = ((uint16_t) sp[0] << 8) | ((uint16_t) sp[1]);
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26 else
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27 val = ((uint16_t) sp[1] << 8) | ((uint16_t) sp[0]);
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28 params[n] = val;
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29 sp += 2;
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30 }
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31 }
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32
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33 main(argc, argv)
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34 char **argv;
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35 {
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36 char *infname, *outfname;
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37 FILE *inf, *outf;
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38 int big_endian;
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39 unsigned frame_no;
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40 uint8_t input_bytes[76*2], frame[33];
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41 int16_t params[76];
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42 int cc;
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43
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44 if (argc == 3 && argv[1][0] != '-') {
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45 big_endian = 0;
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46 infname = argv[1];
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47 outfname = argv[2];
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48 } else if (argc == 4 && !strcmp(argv[1], "-b")) {
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49 big_endian = 1;
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50 infname = argv[2];
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51 outfname = argv[3];
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52 } else {
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53 fprintf(stderr, "usage: %s [-b] input.cod output.gsm\n",
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54 argv[0]);
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55 exit(1);
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56 }
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57 inf = fopen(infname, "r");
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58 if (!inf) {
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59 perror(infname);
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60 exit(1);
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61 }
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62 outf = fopen(outfname, "w");
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63 if (!outf) {
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64 perror(outfname);
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65 exit(1);
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66 }
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67 for (frame_no = 0; ; frame_no++) {
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68 cc = fread(input_bytes, 2, 76, inf);
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69 if (cc == 0)
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70 break;
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71 if (cc != 76) {
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72 fprintf(stderr, "error: short read from %s\n", infname);
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73 exit(1);
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74 }
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75 bytes_to_params(input_bytes, params, big_endian);
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76 gsmfr_pack_from_array(params, frame);
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77 fwrite(frame, 1, sizeof frame, outf);
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78 }
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79 fclose(outf);
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80 exit(0);
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81 }