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annotate amrconv/cod2ietf.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 4c4649a5fec3
children
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1 /*
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2 * This program converts an AMR-encoded speech recording from the .cod
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3 * format used by 3GPP test sequences into the more common .amr format
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4 * of IETF RFC 4867.
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5 */
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6
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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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12 #include "amr_defs.h"
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13
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14 extern unsigned amr_bit_lengths[9];
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15 extern const char amr_file_hdr[IETF_HDR_LEN];
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16 extern const uint8_t extra_bytes_per_ft[9];
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17
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18 main(argc, argv)
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19 char **argv;
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20 {
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21 char *infname, *outfname;
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22 FILE *inf, *outf;
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23 int big_endian;
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24 unsigned frame_no, type, mode, outlen;
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25 uint8_t input_bits[COD_FORMAT_NWORDS], frm_out[MAX_IF1_BYTES+1];
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26 int rc;
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27
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28 if (argc == 3 && argv[1][0] != '-') {
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29 big_endian = 0;
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30 infname = argv[1];
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31 outfname = argv[2];
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32 } else if (argc == 4 && !strcmp(argv[1], "-b")) {
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33 big_endian = 1;
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34 infname = argv[2];
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35 outfname = argv[3];
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36 } else {
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37 fprintf(stderr, "usage: %s [-b] input.cod output.amr\n",
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38 argv[0]);
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39 exit(1);
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40 }
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41 inf = fopen(infname, "r");
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42 if (!inf) {
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43 perror(infname);
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44 exit(1);
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45 }
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46 outf = fopen(outfname, "w");
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47 if (!outf) {
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48 perror(outfname);
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49 exit(1);
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50 }
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51 fwrite(amr_file_hdr, 1, IETF_HDR_LEN, outf);
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52 for (frame_no = 0; ; frame_no++) {
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53 rc = read_cod_bits(inf, big_endian, input_bits, infname);
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54 if (!rc)
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55 break;
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56 type = input_bits[0];
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57 mode = input_bits[245];
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58 switch (type) {
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59 case TX_SPEECH_GOOD:
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60 if (mode > MR122) {
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61 invalid_mode: fprintf(stderr,
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62 "error in %s frame #%u: invalid mode\n",
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63 infname, frame_no);
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64 exit(1);
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65 }
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66 preen_frame_bits(input_bits+1, amr_bit_lengths[mode],
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67 infname, frame_no);
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68 frm_out[0] = (mode << 3) | 0x04;
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69 amr_if1_pack(frm_out+1, input_bits+1, mode);
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70 outlen = extra_bytes_per_ft[mode] + 1;
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71 break;
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72 case TX_SID_FIRST:
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73 case TX_SID_UPDATE:
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74 if (mode > MR122)
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75 goto invalid_mode;
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76 preen_frame_bits(input_bits+1, AMR_NBITS_SID, infname,
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77 frame_no);
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78 frm_out[0] = 0x44;
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79 amr_if1_pack(frm_out+1, input_bits+1, MRDTX);
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80 if (type == TX_SID_UPDATE)
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81 frm_out[5] |= 0x10;
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82 if (mode & 1)
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83 frm_out[5] |= 0x08;
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84 if (mode & 2)
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85 frm_out[5] |= 0x04;
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86 if (mode & 4)
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87 frm_out[5] |= 0x02;
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88 outlen = 6;
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89 break;
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90 case TX_NO_DATA:
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91 frm_out[0] = 0x7C;
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92 outlen = 1;
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93 break;
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94 default:
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95 fprintf(stderr, "error in %s frame #%u: invalid type\n",
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96 infname, frame_no);
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97 exit(1);
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98 }
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99 fwrite(frm_out, 1, outlen, outf);
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100 }
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101 fclose(outf);
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102 exit(0);
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103 }