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annotate amrconv/ietf-parse.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 934cf92a1c45
children
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934cf92a1c45 amrconv: new program amr-ietf-parse
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1 /*
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2 * This program reads an AMR recording in IETF RFC 4867 format and parses it
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3 * into a human-readable form.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "amr_defs.h"
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12
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13 extern char *amr_mode_names[16];
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14 extern const char amr_file_hdr[IETF_HDR_LEN];
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15 extern const uint8_t extra_bytes_per_ft[9];
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16
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17 main(argc, argv)
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18 char **argv;
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19 {
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20 char *infname;
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21 FILE *inf;
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22 uint8_t frm_in[MAX_IF1_BYTES];
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23 unsigned frame_no, mode, qbit, sti, sid_mode;
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24 uint8_t ser_bits[MAX_SERIAL_SIZE];
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25 uint16_t params[MAX_PRM_SIZE];
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26 int rc;
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27
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28 if (argc != 2) {
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29 fprintf(stderr, "usage: %s amr_file\n", argv[0]);
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30 exit(1);
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31 }
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32 infname = argv[1];
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33 inf = fopen(infname, "r");
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34 if (!inf) {
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35 perror(infname);
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36 exit(1);
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37 }
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38 if (fread(frm_in, 1, IETF_HDR_LEN, inf) != IETF_HDR_LEN ||
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39 bcmp(frm_in, amr_file_hdr, IETF_HDR_LEN)) {
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40 fprintf(stderr, "error: %s is not in IETF AMR format\n",
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41 infname);
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42 exit(1);
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43 }
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44 for (frame_no = 0; ; frame_no++) {
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45 rc = getc(inf);
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46 if (rc < 0)
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47 break;
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48 mode = (rc & 0x78) >> 3;
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49 qbit = (rc & 4) >> 2;
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50 printf("#%u: FT=%u (%s) Q=%u\n", frame_no, mode,
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51 amr_mode_names[mode], qbit);
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52 if (mode == MODE_NO_DATA)
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53 continue;
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54 if (mode > MRDTX) {
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55 fprintf(stderr, "error in frame #%u: invalid FT=%u\n",
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56 frame_no, mode);
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57 exit(1);
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58 }
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59 rc = fread(frm_in, 1, extra_bytes_per_ft[mode], inf);
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60 if (rc != extra_bytes_per_ft[mode]) {
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61 fprintf(stderr,
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62 "error: short read from %s on frame #%u\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 amr_if1_unpack(frm_in, ser_bits, mode);
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67 reassemble_amr_params(ser_bits, params, mode);
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68 dump_amr_params(params, mode);
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69 if (mode == MRDTX) {
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70 sti = (frm_in[4] & 0x10) >> 4;
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71 sid_mode = 0;
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72 if (frm_in[4] & 0x08)
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73 sid_mode |= 1;
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74 if (frm_in[4] & 0x04)
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75 sid_mode |= 2;
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76 if (frm_in[4] & 0x02)
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77 sid_mode |= 4;
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78 printf(" SID_%s Mode=%u\n", sti ? "UPDATE" : "FIRST",
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79 sid_mode);
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80 }
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81 }
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82 exit(0);
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83 }