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annotate efrtest/cod-parse.c @ 122:b33f2168fdec

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doc/EFR-rationale article written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Dec 2022 08:51:01 +0000
parents 5a63294fa321
children a5ffec18e4cd
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5a63294fa321 gsmefr-cod-parse test program written
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This program reads an EFR *.cod file in ETSI test sequence format
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3 * (output from either ETSI's official coder program or our gsmefr-etsi-enc)
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4 * and converts it into human-readable format, similar to what one would get
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5 * from our gsmrec-dump utility.
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6 */
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7
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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 <string.h>
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12 #include <strings.h>
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13 #include "../libgsmefr/gsm_efr.h"
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14
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15 #define ETSI_ENC_NWORDS 246
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16
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17 static int
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18 read_input(inf, bitvec, filename_for_errs)
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19 FILE *inf;
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20 uint8_t *bitvec;
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21 char *filename_for_errs;
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22 {
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23 uint8_t file_bytes[ETSI_ENC_NWORDS * 2], *sp;
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24 int cc;
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25 unsigned n;
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26
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27 cc = fread(file_bytes, 2, ETSI_ENC_NWORDS, inf);
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28 if (cc == 0)
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29 return 0;
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30 if (cc != ETSI_ENC_NWORDS) {
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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 sp = file_bytes;
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36 for (n = 0; n < ETSI_ENC_NWORDS; n++) {
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37 if (sp[1]) {
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38 fprintf(stderr,
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39 "error in %s: non-zero in what should be LE upper byte\n",
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40 filename_for_errs);
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41 exit(1);
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42 }
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43 bitvec[n] = sp[0];
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44 sp += 2;
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45 }
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46 return 1;
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47 }
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48
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49 static void
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50 bits2frame(input_bits, frame, filename_for_errs, frame_no)
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51 uint8_t *input_bits, *frame;
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52 char *filename_for_errs;
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53 unsigned frame_no;
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54 {
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55 uint8_t bits[248], *sp, *dp;
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56 unsigned nb, byte, mask;
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57
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58 bits[0] = 1;
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59 bits[1] = 1;
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60 bits[2] = 0;
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61 bits[3] = 0;
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62 bcopy(input_bits, bits + 4, 244);
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63 sp = bits;
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64 dp = frame;
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65 for (nb = 0; nb < EFR_RTP_FRAME_LEN; nb++) {
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66 byte = 0;
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67 for (mask = 0x80; mask; mask >>= 1) {
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68 if (*sp > 1) {
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69 fprintf(stderr,
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70 "error in %s frame #%u: data bit > 1\n",
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71 filename_for_errs, frame_no);
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72 exit(1);
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73 }
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74 if (*sp)
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75 byte |= mask;
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76 sp++;
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77 }
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78 *dp++ = byte;
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79 }
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80 }
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81
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82 main(argc, argv)
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83 char **argv;
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84 {
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85 FILE *inf;
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86 unsigned frame_no;
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87 uint8_t input_bits[ETSI_ENC_NWORDS], frame[EFR_RTP_FRAME_LEN];
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88 int16_t params[EFR_NUM_PARAMS];
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89 int rc, i, j, n;
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90
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91 if (argc != 2) {
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92 fprintf(stderr, "usage: %s file.cod\n", argv[0]);
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93 exit(1);
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94 }
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95 inf = fopen(argv[1], "r");
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96 if (!inf) {
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97 perror(argv[1]);
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98 exit(1);
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99 }
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100 for (frame_no = 0; ; frame_no++) {
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101 rc = read_input(inf, input_bits, argv[1]);
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102 if (!rc)
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103 break;
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104 bits2frame(input_bits, frame, argv[1], frame_no);
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105 printf("#%u: VAD=%u SP=%u SID=%d LPC", frame_no,
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106 input_bits[244], input_bits[245],
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107 EFR_sid_classify(frame));
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108 EFR_frame2params(frame, params);
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109 n = 0;
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110 for (i = 0; i < 5; i++)
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111 printf(" %u", params[n++]);
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112 putchar('\n');
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113 for (i = 0; i < 4; i++) {
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114 putchar(' ');
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115 for (j = 0; j < 13; j++)
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116 printf(" %u", params[n++]);
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117 putchar('\n');
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118 }
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119 }
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120 }