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annotate amrefr/tseq-dec.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 3eadaef8b28f
children
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1 /*
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2 * amrefr-tseq-dec is a test program for our libtwamr-based "alternative EFR"
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3 * decoder: it functions just like gsmefr-etsi-dec, but uses libtwamr as
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4 * the decoder engine instead of libgsmefr. Libgsmefr functions are still
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5 * used for frame unpacking, but not for actual decoding. Note that there is
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6 * no DTX support in this version, and the *.dec test sequence being decoded
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7 * must have SID=0 in every frame. As a simplification, we also require BFI=0:
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8 * while it is possible to feed BFI=1 frames to libtwamr decoder (convert to
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9 * RX_SPEECH_BAD), such support is not needed for decoding the test sequences
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10 * in amr122_efr.zip, hence we've omitted it for simplicity.
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11 *
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12 * The byte order is LE by default or BE with -b option.
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13 */
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14
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15 #include <stdio.h>
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16 #include <stdint.h>
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17 #include <stdlib.h>
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18 #include <string.h>
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19 #include <strings.h>
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20 #include "../libgsmefr/gsm_efr.h"
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21 #include "../libtwamr/tw_amr.h"
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22 #include "../efrtest/etsi.h"
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24 main(argc, argv)
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25 char **argv;
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26 {
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27 int big_endian;
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28 char *infname, *outfname;
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29 FILE *inf, *outf;
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30 struct amr_decoder_state *state;
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31 unsigned frame_no;
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32 uint8_t input_bits[ETSI_DEC_NWORDS], efr_frame[EFR_RTP_FRAME_LEN];
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33 struct amr_param_frame amr_frame;
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34 int16_t pcm[160];
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35 int rc;
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36
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37 if (argc == 3 && argv[1][0] != '-') {
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38 big_endian = 0;
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39 infname = argv[1];
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40 outfname = argv[2];
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41 } else if (argc == 4 && !strcmp(argv[1], "-b")) {
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42 big_endian = 1;
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43 infname = argv[2];
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44 outfname = argv[3];
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45 } else {
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46 fprintf(stderr, "usage: %s [-b] input.dec output.out\n",
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47 argv[0]);
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48 exit(1);
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49 }
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50 inf = fopen(infname, "r");
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51 if (!inf) {
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52 perror(infname);
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53 exit(1);
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54 }
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55 outf = fopen(outfname, "w");
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56 if (!outf) {
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57 perror(outfname);
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58 exit(1);
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59 }
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60 state = amr_decoder_create();
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61 if (!state) {
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62 perror("amr_decoder_create()");
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63 exit(1);
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64 }
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65 amr_frame.type = RX_SPEECH_GOOD;
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66 amr_frame.mode = 0x87;
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67 for (frame_no = 0; ; frame_no++) {
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68 rc = read_etsi_bits(inf, big_endian, input_bits,
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69 ETSI_DEC_NWORDS, infname);
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70 if (!rc)
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71 break;
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72 if (input_bits[0]) {
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73 fprintf(stderr,
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74 "error in %s frame #%u: BFI != 0 not supported\n",
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75 infname, frame_no);
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76 exit(1);
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77 }
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78 bits2frame(input_bits + 1, efr_frame, infname, frame_no);
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79 if (input_bits[245]) {
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80 fprintf(stderr,
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81 "error in %s frame #%u: SID != 0 not supported\n",
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82 infname, frame_no);
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83 exit(1);
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84 }
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85 EFR_frame2params(efr_frame, amr_frame.param);
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86 amr_decode_frame(state, &amr_frame, pcm);
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87 if (big_endian)
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88 write_pcm_be(outf, pcm);
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89 else
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90 write_pcm_le(outf, pcm);
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91 }
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92 fclose(outf);
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93 exit(0);
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94 }