FreeCalypso > hg > gsm-codec-lib

annotate frtest/hand-test.c @ 250:731c98b67da1

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doc/FR1-Rx-DTX: document changes from 1.0.1 to 1.0.2
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 May 2023 04:49:09 +0000
parents d21c68b8f16c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
29
d21c68b8f16c gsmfr-hand-test: yet another debug aid
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /*
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2 * This program is a debug aid that allows a developer to hand-craft input
d21c68b8f16c gsmfr-hand-test: yet another debug aid
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3 * to the GSM 06.10 decoder (libgsm) and see what output magnitude it results
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4 * in, in the style of gsmfr-max-out. This program reads input from an
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5 * ASCII text file in the same format as gsmrec-dump, performs gsm_implode()
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6 * and gsm_decode() operations and reports maximum output magnitude for
d21c68b8f16c gsmfr-hand-test: yet another debug aid
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7 * each processed frame.
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8 */
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9
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10 #include <ctype.h>
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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 <gsm.h>
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17
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18 static char *infname;
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19 static FILE *inf;
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20 static char linebuf[256];
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21 static int lineno;
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22
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23 static
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24 get_line()
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25 {
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26 if (!fgets(linebuf, sizeof linebuf, inf))
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27 return 0;
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28 lineno++;
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29 if (!index(linebuf, '\n')) {
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30 fprintf(stderr, "%s line %d: too long or missing newline\n",
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31 infname, lineno);
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32 exit(1);
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33 }
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34 return 1;
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35 }
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36
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37 static
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38 read_lar_params(params)
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39 gsm_signal *params;
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40 {
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41 char *cp;
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42 unsigned n;
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43
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44 for (;;) {
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45 if (!get_line())
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46 return 0;
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47 for (cp = linebuf; isspace(*cp); cp++)
d21c68b8f16c gsmfr-hand-test: yet another debug aid
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48 ;
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49 if (*cp)
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50 break;
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51 }
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52 if (*cp == '#') {
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53 cp++;
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54 if (!isdigit(*cp)) {
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55 inv_syntax: fprintf(stderr,
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56 "%s line %d: invalid syntax (expected LAR)\n",
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57 infname, lineno);
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58 exit(1);
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59 }
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60 while (isdigit(*cp))
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61 cp++;
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62 if (*cp++ != ':')
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63 goto inv_syntax;
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64 while (isspace(*cp))
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65 cp++;
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66 }
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67 if (cp[0] != 'F' || cp[1] != 'R' || !isspace(cp[2]))
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68 goto inv_syntax;
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69 cp += 3;
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70 for (n = 0; n < 8; n++) {
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71 while (isspace(*cp))
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72 cp++;
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73 if (!isdigit(*cp))
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74 goto inv_syntax;
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75 params[n] = strtoul(cp, &cp, 10);
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76 if (!isspace(*cp))
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77 goto inv_syntax;
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78 }
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79 fputs(linebuf, stdout);
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80 return 1;
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81 }
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82
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83 static void
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84 read_subframe_params(params)
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85 gsm_signal *params;
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86 {
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87 char *cp;
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88 unsigned n;
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89
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90 for (;;) {
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91 if (!get_line()) {
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92 fprintf(stderr,
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93 "%s bad: EOF in the middle of a frame\n",
d21c68b8f16c gsmfr-hand-test: yet another debug aid
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94 infname);
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95 exit(1);
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96 }
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97 for (cp = linebuf; isspace(*cp); cp++)
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98 ;
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99 if (*cp)
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100 break;
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101 }
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102 for (n = 0; n < 17; n++) {
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103 while (isspace(*cp))
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104 cp++;
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105 if (!isdigit(*cp)) {
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106 inv_syntax: fprintf(stderr,
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107 "%s line %d: invalid syntax (expected subframe)\n",
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108 infname, lineno);
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109 exit(1);
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110 }
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111 params[n] = strtoul(cp, &cp, 10);
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112 if (!isspace(*cp))
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113 goto inv_syntax;
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114 }
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115 fputs(linebuf, stdout);
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116 }
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117
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118 static
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119 read_frame(params)
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120 gsm_signal *params;
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121 {
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122 int rc;
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123 unsigned n, idx;
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124
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125 rc = read_lar_params(params);
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126 if (!rc)
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127 return 0;
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128 idx = 8;
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129 for (n = 0; n < 4; n++) {
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130 read_subframe_params(params + idx);
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131 idx += 17;
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132 }
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133 return 1;
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134 }
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135
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136 main(argc, argv)
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137 char **argv;
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138 {
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139 gsm dec_state;
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140 gsm_signal params[76];
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141 uint8_t frame[33];
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142 int16_t pcm[160];
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143 int rc, i;
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144 unsigned samp_abs, samp_max;
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145
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146 if (argc != 2) {
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147 fprintf(stderr, "usage: %s input-file\n", argv[0]);
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148 exit(1);
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149 }
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150 infname = argv[1];
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151 inf = fopen(infname, "r");
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152 if (!inf) {
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153 perror(infname);
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154 exit(1);
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155 }
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156 dec_state = gsm_create();
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157 if (!dec_state) {
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158 fprintf(stderr, "gsm_create() failed!\n");
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159 exit(1);
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160 }
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161 for (;;) {
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162 rc = read_frame(params);
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163 if (!rc)
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164 break;
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165 gsm_implode(dec_state, params, frame);
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166 gsm_decode(dec_state, frame, pcm);
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167 samp_max = 0;
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168 for (i = 0; i < 160; i++) {
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169 if (pcm[i] >= 0)
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170 samp_abs = pcm[i];
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171 else
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172 samp_abs = -pcm[i];
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173 if (samp_abs > samp_max)
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174 samp_max = samp_abs;
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175 }
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176 printf(" MAX=%u\n", samp_max);
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177 }
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178 exit(0);
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179 }