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annotate frtest/decode-tw5.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 f9eefb61fb2f
children
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1 /*
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2 * This file is the main module for gsmfr-decode-tw5 utility. It is just
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3 * like the original gsmfr-decode, but reads the GSM-FR speech recording
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4 * from TW-TS-005 Annex A hexadecimal format instead of the old gsmx
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5 * binary format.
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6 */
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8 #include <stdio.h>
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9 #include <stdint.h>
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10 #include <stdlib.h>
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11 #include "../libgsmfr2/tw_gsmfr.h"
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12 #include "../libtest/tw5reader.h"
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13 #include "../libtest/wavwriter.h"
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14 #include "../libtest/pcmwrite.h"
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16 main(argc, argv)
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17 char **argv;
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18 {
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19 FILE *hexf;
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20 void *wav;
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21 unsigned lineno;
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22 struct gsmfr_fulldec_state *fd_state;
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23 uint8_t frame[TWTS005_MAX_FRAME];
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24 unsigned frame_len;
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25 int16_t pcm[160];
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26 int rc;
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28 if (argc != 3) {
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29 fprintf(stderr, "usage: %s input.hex output.wav\n", argv[0]);
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30 exit(1);
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31 }
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32 hexf = fopen(argv[1], "r");
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33 if (!hexf) {
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34 perror(argv[1]);
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35 exit(1);
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36 }
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37 lineno = 0;
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38 wav = wav_write_open(argv[2], 8000, 16, 1);
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39 if (!wav) {
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40 perror(argv[2]);
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41 exit(1);
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42 }
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43 fd_state = gsmfr_fulldec_create();
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44 if (!fd_state) {
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45 fprintf(stderr, "gsmfr_fulldec_create() failed!\n");
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46 exit(1);
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47 }
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48 for (;;) {
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49 rc = twts005_read_frame(hexf, &lineno, frame, &frame_len);
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50 if (rc < 0) {
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51 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
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52 argv[1], lineno);
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53 exit(1);
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54 }
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55 if (!rc)
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56 break;
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57 rc = gsmfr_fulldec_rtp_in(fd_state, frame, frame_len, pcm);
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58 if (rc < 0) {
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59 fprintf(stderr,
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60 "%s line %u: not a valid GSM-FR frame\n",
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61 argv[1], lineno);
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62 exit(1);
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63 }
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64 write_pcm_to_wav(wav, pcm);
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65 }
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66 wav_write_close(wav);
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67 exit(0);
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68 }