FreeCalypso > hg > gsm-codec-lib

annotate miscutil/gsmx-to-tw5a.c @ 556:18aca50d68df default tip

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doc/Calypso-TCH-downlink: update for FR1 BFI-with-data
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Oct 2024 01:54:00 +0000
parents 5595293e4f29
children
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1 /*
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2 * This program converts FR/EFR speech recordings from gsmx binary format
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3 * into more formally standardized TW-TS-005 Annex A format.
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4 *
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5 * FR and EFR frames are written in basic format (no TEH);
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6 * BFI marker records are converted into TW-TS-001 No_Data frames.
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7 */
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8
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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 #include "../libgsmfr2/tw_gsmfr.h"
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15 #include "../libgsmefr/gsm_efr.h"
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16 #include "../libtest/binreader.h"
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17 #include "../libtest/tw5writer.h"
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18
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19 main(argc, argv)
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20 char **argv;
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21 {
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22 FILE *binf, *outf;
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23 unsigned frame_index;
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24 uint8_t frame[BINFILE_MAX_FRAME];
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25 int rc;
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26
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27 if (argc != 3) {
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28 fprintf(stderr, "usage: %s input.gsmx output.hex\n", argv[0]);
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29 exit(1);
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30 }
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31 binf = fopen(argv[1], "r");
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32 if (!binf) {
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33 perror(argv[1]);
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34 exit(1);
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35 }
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36 if (strcmp(argv[2], "-")) {
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37 outf = fopen(argv[2], "w");
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38 if (!outf) {
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39 perror(argv[2]);
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40 exit(1);
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41 }
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42 } else
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43 outf = stdout;
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44 for (frame_index = 0; ; frame_index++) {
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45 rc = binfile_read_frame(binf, frame);
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46 if (rc < 0) {
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47 fprintf(stderr,
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48 "error: garbage in %s after %u frames\n",
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49 argv[1], frame_index);
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50 exit(1);
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51 }
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52 if (!rc)
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53 break;
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54 switch (frame[0] & 0xF0) {
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55 case 0xB0:
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56 fprintf(outf, "%02X\n", 0xE6 | frame[1] & 1);
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57 break;
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58 case 0xC0:
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59 emit_hex_frame(outf, frame, EFR_RTP_FRAME_LEN);
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60 break;
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61 case 0xD0:
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62 emit_hex_frame(outf, frame, GSMFR_RTP_FRAME_LEN);
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63 break;
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64 }
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65 }
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66 exit(0);
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67 }