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annotate dev/gsmfr-dhf.c @ 494:aaf4dec8bee0

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libgsmhr1: implement perfect SID detection
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 17 Jun 2024 23:14:19 +0000
parents 37dc5c84bbe9
children
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1 /*
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2 * This program is meant to be run only once by the developer - it
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3 * generates RTP-packed form of the decoder homing frame for GSM-FR,
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4 * as specified in more recent versions of GSM 06.10 spec.
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5 */
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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13 extern void gsmfr_pack_to_rtp(const int16_t *params, uint8_t *frame);
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15 static const int16_t larc[8] = {9, 23, 15, 8, 7, 3, 3, 2};
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17 main(argc, argv)
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18 char **argv;
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19 {
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20 int16_t params[76], *pp;
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21 uint8_t frame[33];
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22 unsigned m, n;
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24 /* gather params */
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25 bcopy(larc, params, sizeof(int16_t) * 8);
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26 pp = params + 8;
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27 for (m = 0; m < 4; m++) {
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28 *pp++ = 40;
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29 *pp++ = 0;
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30 *pp++ = 0;
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31 *pp++ = 0;
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32 for (n = 0; n < 13; n++) {
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33 if (m == 3 && n == 4)
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34 *pp++ = 3;
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35 else
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36 *pp++ = 4;
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37 }
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38 }
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39 /* generate frame */
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40 gsmfr_pack_to_rtp(params, frame);
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41 /* print the frame */
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42 for (n = 0; n < 33; n++) {
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43 printf("0x%02X,", frame[n]);
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44 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32)
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45 putchar('\n');
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46 else
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47 putchar(' ');
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48 }
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49 exit(0);
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50 }