FreeCalypso > hg > gsm-codec-lib
annotate efrtest/etsi-dec.c @ 132:3fd48946dcb8
doc/EFR-testing article written
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 11 Dec 2022 05:12:02 +0000 |
parents | e5ee684c6d29 |
children | 8ed838709897 |
rev | line source |
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9cf1355bc071
gsmefr-etsi-dec test program written
Mychaela Falconia <falcon@freecalypso.org>
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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 * 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 #define ETSI_DEC_NWORDS 247 |
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19 |
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20 static int |
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21 read_input(inf, bitvec, filename_for_errs) |
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22 FILE *inf; |
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23 uint8_t *bitvec; |
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24 char *filename_for_errs; |
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25 { |
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26 uint8_t file_bytes[ETSI_DEC_NWORDS * 2], *sp; |
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27 int cc; |
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28 unsigned n; |
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29 |
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30 cc = fread(file_bytes, 2, ETSI_DEC_NWORDS, inf); |
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31 if (cc == 0) |
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32 return 0; |
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33 if (cc != ETSI_DEC_NWORDS) { |
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34 fprintf(stderr, "error: short read from %s\n", |
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35 filename_for_errs); |
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36 exit(1); |
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37 } |
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38 sp = file_bytes; |
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39 for (n = 0; n < ETSI_DEC_NWORDS; n++) { |
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40 if (sp[1]) { |
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41 fprintf(stderr, |
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42 "error in %s: non-zero in what should be LE upper byte\n", |
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43 filename_for_errs); |
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44 exit(1); |
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45 } |
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46 bitvec[n] = sp[0]; |
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47 sp += 2; |
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48 } |
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49 return 1; |
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50 } |
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51 |
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52 static void |
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53 bits2frame(input_bits, frame, filename_for_errs, frame_no) |
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54 uint8_t *input_bits, *frame; |
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55 char *filename_for_errs; |
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56 unsigned frame_no; |
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57 { |
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58 uint8_t bits[248], *sp, *dp; |
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59 unsigned nb, byte, mask; |
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60 |
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61 bits[0] = 1; |
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62 bits[1] = 1; |
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63 bits[2] = 0; |
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64 bits[3] = 0; |
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65 bcopy(input_bits, bits + 4, 244); |
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66 sp = bits; |
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67 dp = frame; |
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68 for (nb = 0; nb < EFR_RTP_FRAME_LEN; nb++) { |
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69 byte = 0; |
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70 for (mask = 0x80; mask; mask >>= 1) { |
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71 if (*sp > 1) { |
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72 fprintf(stderr, |
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73 "error in %s frame #%u: data bit > 1\n", |
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74 filename_for_errs, frame_no); |
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75 exit(1); |
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76 } |
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77 if (*sp) |
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78 byte |= mask; |
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79 sp++; |
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80 } |
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81 *dp++ = byte; |
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82 } |
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83 } |
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84 |
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85 static void |
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86 write_pcm_le(outf, pcm) |
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87 FILE *outf; |
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88 int16_t *pcm; |
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89 { |
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90 uint8_t bytes[320], *dp; |
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91 int16_t samp; |
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92 unsigned n; |
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93 |
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94 dp = bytes; |
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95 for (n = 0; n < 160; n++) { |
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96 samp = pcm[n]; |
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97 *dp++ = samp & 0xFF; |
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98 *dp++ = (samp >> 8) & 0xFF; |
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99 } |
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100 fwrite(bytes, 2, 160, outf); |
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101 } |
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102 |
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103 main(argc, argv) |
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104 char **argv; |
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105 { |
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106 FILE *inf, *outf; |
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107 struct EFR_decoder_state *state; |
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108 unsigned frame_no; |
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109 uint8_t input_bits[ETSI_DEC_NWORDS], frame[EFR_RTP_FRAME_LEN]; |
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110 int16_t pcm[160]; |
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111 int rc; |
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112 |
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113 if (argc != 3) { |
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114 fprintf(stderr, "usage: %s input.dec output.out\n", argv[0]); |
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115 exit(1); |
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116 } |
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117 inf = fopen(argv[1], "r"); |
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118 if (!inf) { |
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119 perror(argv[1]); |
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120 exit(1); |
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121 } |
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122 outf = fopen(argv[2], "w"); |
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123 if (!outf) { |
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124 perror(argv[2]); |
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125 exit(1); |
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126 } |
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127 state = EFR_decoder_create(); |
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128 if (!state) { |
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129 perror("EFR_decoder_create()"); |
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130 exit(1); |
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131 } |
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132 for (frame_no = 0; ; frame_no++) { |
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133 rc = read_input(inf, input_bits, argv[1]); |
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134 if (!rc) |
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135 break; |
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136 if (input_bits[0] > 1) { |
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137 fprintf(stderr, "error in %s frame #%u: BFI > 1\n", |
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138 argv[1], frame_no); |
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139 exit(1); |
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140 } |
97
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141 bits2frame(input_bits + 1, frame, argv[1], frame_no); |
96
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142 if (input_bits[245] > 2) { |
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143 fprintf(stderr, "error in %s frame #%u: SID > 2\n", |
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144 argv[1], frame_no); |
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145 exit(1); |
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146 } |
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147 if (input_bits[246] > 1) { |
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148 fprintf(stderr, "error in %s frame #%u: TAF > 1\n", |
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149 argv[1], frame_no); |
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150 exit(1); |
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151 } |
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152 rc = EFR_sid_classify(frame); |
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153 if (input_bits[245] != rc) { |
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154 fprintf(stderr, |
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155 "warning: frame #%u has mismatching SID (file says %u, analysis yields %d)\n", |
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156 frame_no, input_bits[245], rc); |
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157 } |
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158 EFR_decode_frame(state, frame, input_bits[0], input_bits[246], |
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159 pcm); |
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160 write_pcm_le(outf, pcm); |
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161 } |
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162 fclose(outf); |
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163 exit(0); |
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164 } |