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annotate efrtest/etsi-enc.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 ff0372186b59
children a13b1605142b
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114
ff0372186b59 gsmefr-etsi-enc test program written
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1 /*
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2 * gsmefr-etsi-enc is a test program for our EFR encoder: it reads raw
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3 * 16-bit PCM (matching ETSI's *.inp) as input and writes ETSI's *.cod
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4 * format as output, allowing our decoder to be tested with ETSI's
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5 * official test 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 * matching the official test sequences in ts_100725v050200p0.zip.
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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
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18 static int
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19 read_input(inf, pcm, filename_for_errs)
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20 FILE *inf;
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21 int16_t *pcm;
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22 char *filename_for_errs;
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23 {
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24 uint8_t file_bytes[320], *sp;
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25 int cc;
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26 unsigned n;
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27
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28 cc = fread(file_bytes, 2, 160, inf);
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29 if (cc == 0)
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30 return 0;
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31 if (cc != 160) {
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32 fprintf(stderr, "error: short read from %s\n",
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33 filename_for_errs);
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34 exit(1);
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35 }
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36 sp = file_bytes;
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37 for (n = 0; n < 160; n++) {
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38 pcm[n] = sp[0] | (sp[1] << 8);
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39 sp += 2;
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40 }
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41 return 1;
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42 }
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43
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44 static void
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45 frame2bits(frame, bits)
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46 uint8_t *frame, *bits;
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47 {
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48 unsigned nb, byte, mask, bit;
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49
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50 for (nb = 0; nb < EFR_RTP_FRAME_LEN; nb++) {
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51 byte = *frame++;
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52 for (mask = 0x80; mask; mask >>= 1) {
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53 if (byte & mask)
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54 bit = 1;
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55 else
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56 bit = 0;
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57 *bits++ = bit;
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58 }
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59 }
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60 }
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61
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62 static void
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63 emit_output(outf, bits, nbits)
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64 FILE *outf;
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65 uint8_t *bits;
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66 unsigned nbits;
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67 {
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68 unsigned n;
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69
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70 for (n = 0; n < nbits; n++) {
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71 putc(bits[n], outf);
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72 putc(0, outf);
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73 }
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74 }
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75
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76 main(argc, argv)
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77 char **argv;
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78 {
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79 char *infname, *outfname;
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80 FILE *inf, *outf;
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81 struct EFR_encoder_state *state;
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82 int16_t pcm[160];
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83 uint8_t frame[EFR_RTP_FRAME_LEN], bits[250];
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84 int dtx, rc, sp, vad;
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85
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86 if (argc == 3 && argv[1][0] != '-') {
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87 dtx = 0;
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88 infname = argv[1];
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89 outfname = argv[2];
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90 } else if (argc == 4 && !strcmp(argv[1], "-d")) {
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91 dtx = 1;
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92 infname = argv[2];
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93 outfname = argv[3];
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94 } else {
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95 fprintf(stderr, "usage: %s [-d] input.inp output.cod\n",
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96 argv[0]);
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97 exit(1);
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98 }
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99 inf = fopen(infname, "r");
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100 if (!inf) {
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101 perror(infname);
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102 exit(1);
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103 }
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104 outf = fopen(outfname, "w");
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105 if (!outf) {
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106 perror(outfname);
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107 exit(1);
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108 }
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109 state = EFR_encoder_create(dtx);
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110 if (!state) {
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111 perror("EFR_encoder_create()");
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112 exit(1);
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113 }
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114 for (;;) {
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115 rc = read_input(inf, pcm, argv[1]);
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116 if (!rc)
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117 break;
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118 EFR_encode_frame(state, pcm, frame, &sp, &vad);
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119 frame2bits(frame, bits);
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120 bits[248] = vad;
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121 bits[249] = sp;
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122 emit_output(outf, bits + 4, 246);
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123 }
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124 fclose(outf);
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125 exit(0);
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126 }