FreeCalypso > hg > gsm-codec-lib

annotate efrtest/etsi-dec.c @ 207:10f11a2d4042

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pcap utils: fix bug in the case of RTP timestamp 16-bit rollover
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 17 Feb 2023 19:56:45 +0000
parents da17c7f02c6c
children 9f354d2aea13
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1 /*
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2 * gsmefr-etsi-dec is a test program for our EFR decoder: it reads ETSI's
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3 * .dec format as input and writes raw 16-bit PCM (same as ETSI's *.out)
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4 * as output, allowing our decoder to be tested with ETSI's official test
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5 * sequences.
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6 *
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7 * ETSI input and output files are read and written in LE byte order
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8 * by default, or in BE byte order if -b option is given.
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9 */
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10
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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 "../libgsmefr/gsm_efr.h"
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17 #include "etsi.h"
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18
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19 static void
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20 write_pcm_be(outf, pcm)
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21 FILE *outf;
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22 int16_t *pcm;
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23 {
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24 uint8_t bytes[320], *dp;
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25 int16_t samp;
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26 unsigned n;
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27
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28 dp = bytes;
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29 for (n = 0; n < 160; n++) {
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30 samp = pcm[n];
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31 *dp++ = (samp >> 8) & 0xFF;
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32 *dp++ = samp & 0xFF;
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33 }
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34 fwrite(bytes, 2, 160, outf);
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35 }
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36
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37 static void
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38 write_pcm_le(outf, pcm)
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39 FILE *outf;
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40 int16_t *pcm;
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41 {
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42 uint8_t bytes[320], *dp;
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43 int16_t samp;
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44 unsigned n;
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45
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46 dp = bytes;
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47 for (n = 0; n < 160; n++) {
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48 samp = pcm[n];
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49 *dp++ = samp & 0xFF;
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50 *dp++ = (samp >> 8) & 0xFF;
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51 }
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52 fwrite(bytes, 2, 160, outf);
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53 }
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54
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55 main(argc, argv)
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56 char **argv;
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57 {
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58 int big_endian;
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59 char *infname, *outfname;
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60 FILE *inf, *outf;
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61 struct EFR_decoder_state *state;
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62 unsigned frame_no;
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63 uint8_t input_bits[ETSI_DEC_NWORDS], frame[EFR_RTP_FRAME_LEN];
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64 int16_t pcm[160];
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65 int rc;
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66
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67 if (argc == 3 && argv[1][0] != '-') {
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68 big_endian = 0;
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69 infname = argv[1];
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70 outfname = argv[2];
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71 } else if (argc == 4 && !strcmp(argv[1], "-b")) {
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72 big_endian = 1;
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73 infname = argv[2];
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74 outfname = argv[3];
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75 } else {
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76 fprintf(stderr, "usage: %s [-b] input.dec output.out\n",
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77 argv[0]);
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78 exit(1);
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79 }
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80 inf = fopen(infname, "r");
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81 if (!inf) {
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82 perror(infname);
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83 exit(1);
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84 }
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85 outf = fopen(outfname, "w");
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86 if (!outf) {
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87 perror(outfname);
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88 exit(1);
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89 }
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90 state = EFR_decoder_create();
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91 if (!state) {
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92 perror("EFR_decoder_create()");
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93 exit(1);
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94 }
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95 for (frame_no = 0; ; frame_no++) {
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96 rc = read_etsi_bits(inf, big_endian, input_bits,
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97 ETSI_DEC_NWORDS, infname);
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98 if (!rc)
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99 break;
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100 if (input_bits[0] > 1) {
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101 fprintf(stderr, "error in %s frame #%u: BFI > 1\n",
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102 infname, frame_no);
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103 exit(1);
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104 }
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105 bits2frame(input_bits + 1, frame, infname, frame_no);
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106 if (input_bits[245] > 2) {
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107 fprintf(stderr, "error in %s frame #%u: SID > 2\n",
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108 infname, frame_no);
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109 exit(1);
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110 }
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111 if (input_bits[246] > 1) {
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112 fprintf(stderr, "error in %s frame #%u: TAF > 1\n",
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113 infname, frame_no);
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114 exit(1);
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115 }
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116 rc = EFR_sid_classify(frame);
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117 if (input_bits[245] != rc) {
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118 fprintf(stderr,
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119 "warning: frame #%u has mismatching SID (file says %u, analysis yields %d)\n",
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120 frame_no, input_bits[245], rc);
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121 }
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122 EFR_decode_frame(state, frame, input_bits[0], input_bits[246],
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123 pcm);
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124 if (big_endian)
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125 write_pcm_be(outf, pcm);
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126 else
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127 write_pcm_le(outf, pcm);
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128 }
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129 fclose(outf);
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130 exit(0);
9cf1355bc071 gsmefr-etsi-dec test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 }