FreeCalypso > hg > gsm-codec-lib

annotate efrtest/etsi-enc.c @ 181:3a0ee08a3b9d

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doc/EFR-rationale: typo fix
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 02 Jan 2023 20:09:07 +0000
parents a13b1605142b
children d4f47d0962e7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 <unistd.h>
114
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17 #include "../libgsmefr/gsm_efr.h"
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18
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19 static int
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20 read_input(inf, pcm, filename_for_errs, big_endian)
114
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21 FILE *inf;
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22 int16_t *pcm;
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23 char *filename_for_errs;
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24 {
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25 uint8_t file_bytes[320], *sp;
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26 int cc;
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27 unsigned n;
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28
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29 cc = fread(file_bytes, 2, 160, inf);
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30 if (cc == 0)
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31 return 0;
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32 if (cc != 160) {
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33 fprintf(stderr, "error: short read from %s\n",
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34 filename_for_errs);
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35 exit(1);
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36 }
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37 sp = file_bytes;
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38 for (n = 0; n < 160; n++) {
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39 if (big_endian)
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40 pcm[n] = (sp[0] << 8) | sp[1];
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41 else
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42 pcm[n] = sp[0] | (sp[1] << 8);
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43 sp += 2;
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44 }
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45 return 1;
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46 }
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47
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48 static void
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49 frame2bits(frame, bits)
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50 uint8_t *frame, *bits;
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51 {
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52 unsigned nb, byte, mask, bit;
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53
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54 for (nb = 0; nb < EFR_RTP_FRAME_LEN; nb++) {
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55 byte = *frame++;
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56 for (mask = 0x80; mask; mask >>= 1) {
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57 if (byte & mask)
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58 bit = 1;
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59 else
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60 bit = 0;
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61 *bits++ = bit;
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62 }
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63 }
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64 }
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65
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66 static void
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67 emit_output(outf, bits, nbits, big_endian)
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68 FILE *outf;
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69 uint8_t *bits;
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70 unsigned nbits;
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71 {
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72 unsigned n;
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73
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74 for (n = 0; n < nbits; n++) {
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75 if (big_endian) {
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76 putc(0, outf);
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77 putc(bits[n], outf);
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78 } else {
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79 putc(bits[n], outf);
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80 putc(0, outf);
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81 }
114
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82 }
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83 }
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84
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85 main(argc, argv)
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86 char **argv;
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87 {
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88 char *infname, *outfname;
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89 FILE *inf, *outf;
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90 struct EFR_encoder_state *state;
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91 int16_t pcm[160];
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92 uint8_t frame[EFR_RTP_FRAME_LEN], bits[250];
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93 int opt, dtx = 0, rc, sp, vad, big_endian = 0;
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94 extern int optind;
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95
151
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96 while ((opt = getopt(argc, argv, "bd")) != EOF) {
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97 switch (opt) {
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98 case 'b':
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99 big_endian = 1;
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100 continue;
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101 case 'd':
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102 dtx = 1;
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103 continue;
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104 default:
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105 usage:
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106 fprintf(stderr,
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107 "usage: %s [-b] [-d] input.inp output.cod\n",
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108 argv[0]);
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109 exit(1);
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110 }
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111 }
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112 if (argc != optind + 2)
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113 goto usage;
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114 infname = argv[optind];
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115 outfname = argv[optind+1];
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116
114
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117 inf = fopen(infname, "r");
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118 if (!inf) {
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119 perror(infname);
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120 exit(1);
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121 }
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122 outf = fopen(outfname, "w");
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123 if (!outf) {
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124 perror(outfname);
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125 exit(1);
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126 }
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127 state = EFR_encoder_create(dtx);
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128 if (!state) {
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129 perror("EFR_encoder_create()");
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130 exit(1);
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131 }
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132 for (;;) {
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133 rc = read_input(inf, pcm, infname, big_endian);
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134 if (!rc)
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135 break;
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136 EFR_encode_frame(state, pcm, frame, &sp, &vad);
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137 frame2bits(frame, bits);
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138 bits[248] = vad;
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139 bits[249] = sp;
151
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140 emit_output(outf, bits + 4, 246, big_endian);
114
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141 }
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142 fclose(outf);
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143 exit(0);
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144 }