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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents e4ca04586118
children
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1 /*
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2 * This program is meant to be run only once by the developer - it uses
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3 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11
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4 * (3GPP TS 46.011) from the table format given in the spec into
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5 * libgsm/RTP format.
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6 *
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7 * Later update: this program has been reworked to use the local function
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8 * in pack_gsmfr_rtp.c instead of gsm_implode(), in order to eliminate
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9 * all build dependencies on old libgsm.
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10 */
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12 #include <stdio.h>
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13 #include <stdint.h>
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14 #include <stdlib.h>
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15 #include <string.h>
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16 #include <strings.h>
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18 extern void gsmfr_pack_to_rtp(const int16_t *params, uint8_t *frame);
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19
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20 static const int16_t lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2};
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21 static const int16_t subframe_params[17] =
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22 {40, 0, 1, 0, 3, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3};
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24 main(argc, argv)
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25 char **argv;
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26 {
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27 int16_t params[76];
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28 uint8_t frame[33];
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29 unsigned n;
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30
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31 /* gather params */
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32 bcopy(lar_params, params, sizeof(int16_t) * 8);
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33 bcopy(subframe_params, params + 8, sizeof(int16_t) * 17);
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34 bcopy(subframe_params, params + 25, sizeof(int16_t) * 17);
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35 bcopy(subframe_params, params + 42, sizeof(int16_t) * 17);
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36 bcopy(subframe_params, params + 59, sizeof(int16_t) * 17);
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37 /* generate frame */
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38 gsmfr_pack_to_rtp(params, frame);
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39 /* print the frame */
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40 for (n = 0; n < 33; n++) {
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41 printf("0x%02X,", frame[n]);
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42 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32)
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43 putchar('\n');
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44 else
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45 putchar(' ');
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46 }
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47 exit(0);
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48 }