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annotate trau-ul-prep/efrdec2tsrc.c @ 38:d7674c80426c

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trau-parse: add decoding of data frames
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 12 Sep 2024 19:50:29 +0000
parents 8957383370c5
children
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8957383370c5 trau-ul-prep: implement efrdec2tsrc
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1 /*
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2 * This program reads an EFR *.dec file in ETSI test sequence format
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3 * and converts it into ASCII source for TRAU-UL construction.
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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 <unistd.h>
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12 #include <gsm_efr.h>
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13 #include "etsi.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 char *infname, *outfname;
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19 FILE *inf, *outf;
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20 int big_endian = 0;
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21 unsigned frame_no;
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22 uint8_t input_bits[ETSI_DEC_NWORDS], frame[EFR_RTP_FRAME_LEN];
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23 int16_t params[EFR_NUM_PARAMS];
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24 int rc, i, j, n;
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25 extern int optind;
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26
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27 while ((rc = getopt(argc, argv, "b")) != EOF) {
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28 switch (rc) {
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29 case 'b':
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30 big_endian = 1;
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31 continue;
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32 default:
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33 usage:
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34 fprintf(stderr,
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35 "usage: %s [-b] input.dec [output.tsrc]\n",
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36 argv[0]);
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37 exit(1);
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38 }
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39 }
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40 if (argc < optind + 1 || argc > optind + 2)
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41 goto usage;
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42 infname = argv[optind];
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43 outfname = argv[optind+1];
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44
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45 inf = fopen(infname, "r");
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46 if (!inf) {
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47 perror(infname);
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48 exit(1);
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49 }
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50 if (outfname) {
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51 outf = fopen(outfname, "w");
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52 if (!outf) {
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53 perror(outfname);
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54 exit(1);
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55 }
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56 } else
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57 outf = stdout;
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58 for (frame_no = 0; ; frame_no++) {
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59 rc = read_etsi_bits(inf, big_endian, input_bits,
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60 ETSI_DEC_NWORDS, infname);
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61 if (!rc)
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62 break;
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63 bits2frame(input_bits + 1, frame, infname, frame_no);
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64 fprintf(outf, "# input frame %u\nFrame_EFR {\n", frame_no);
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65 if (input_bits[246])
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66 fputs("\t# TAF position\n", outf);
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67 fprintf(outf, "\tBFI %u\n", input_bits[0]);
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68 EFR_frame2params(frame, params);
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69 n = 0;
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70 fputs("\tLPC", outf);
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71 for (i = 0; i < 5; i++)
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72 fprintf(outf, " %d", params[n++]);
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73 putc('\n', outf);
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74 for (i = 0; i < 4; i++) {
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75 fputs("\tsf", outf);
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76 for (j = 0; j < 13; j++)
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77 fprintf(outf, " %d", params[n++]);
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78 putc('\n', outf);
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79 }
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80 fprintf(outf, "\tSID %u\n", input_bits[245]);
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81 fputs("}\n\n", outf);
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82 }
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83 exit(0);
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84 }