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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 edbbbf1c4ab1
children
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1 /*
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2 * twamr-tseq-dec is a test program for our AMR decoder: it reads
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3 * 3GPP AMR *.cod files as input and writes 16-bit linear PCM (raw)
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4 * files as output, allowing libtwamr decoder to be tested with the
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5 * official test sequences.
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6 *
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7 * Both input and output are read/written in the host machine's
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8 * native byte order.
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9 */
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11 #include <stdio.h>
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12 #include <stdint.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16 #include <unistd.h>
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17 #include "../libtwamr/tw_amr.h"
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19 static int
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20 read_input(inf, cod, filename_for_errs)
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21 FILE *inf;
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22 uint16_t *cod;
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23 char *filename_for_errs;
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24 {
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25 int cc;
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26
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27 cc = fread(cod, 2, AMR_COD_WORDS, inf);
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28 if (cc == 0)
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29 return 0;
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30 if (cc != AMR_COD_WORDS) {
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31 fprintf(stderr, "error: short read from %s\n",
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32 filename_for_errs);
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33 exit(1);
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34 }
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35 return 1;
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36 }
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37
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38 main(argc, argv)
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39 char **argv;
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40 {
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41 char *infname, *outfname;
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42 FILE *inf, *outf;
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43 struct amr_decoder_state *state;
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44 uint16_t cod[AMR_COD_WORDS];
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45 struct amr_param_frame frame;
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46 int16_t pcm[160];
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47 int opt, use_rxtype = 0, rc;
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48 unsigned frame_no;
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49 extern int optind;
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50
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51 while ((opt = getopt(argc, argv, "r")) != EOF) {
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52 switch (opt) {
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53 case 'r':
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54 use_rxtype = 1;
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55 continue;
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56 default:
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57 usage:
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58 fprintf(stderr, "usage: %s [-r] input.cod output.out\n",
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59 argv[0]);
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60 exit(1);
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61 }
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62 }
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63 if (argc != optind + 2)
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64 goto usage;
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65 infname = argv[optind];
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66 outfname = argv[optind+1];
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67
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68 inf = fopen(infname, "r");
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69 if (!inf) {
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70 perror(infname);
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71 exit(1);
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72 }
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73 outf = fopen(outfname, "w");
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74 if (!outf) {
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75 perror(outfname);
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76 exit(1);
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77 }
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78 state = amr_decoder_create();
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79 if (!state) {
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80 perror("amr_decoder_create()");
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81 exit(1);
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82 }
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83 for (frame_no = 0; ; frame_no++) {
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84 rc = read_input(inf, cod, infname);
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85 if (!rc)
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86 break;
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87 rc = amr_frame_from_tseq(cod, use_rxtype, &frame);
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88 if (rc < 0) {
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89 fprintf(stderr,
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90 "error in %s frame %u: amr_frame_from_tseq() returned %d\n",
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91 infname, frame_no, rc);
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92 exit(1);
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93 }
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94 amr_decode_frame(state, &frame, pcm);
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95 fwrite(pcm, 2, 160, outf);
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96 }
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97 fclose(outf);
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98 exit(0);
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99 }