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annotate miscutil/gsmx-to-tw5a.c @ 585:3c6bf0d26ee7 default tip

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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 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 }