FreeCalypso > hg > gsm-codec-lib
annotate frtest/hand-test.c @ 66:824ff833bda9
libgsmefr/dtx.c: initial import from ETSI code
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 26 Nov 2022 03:52:39 +0000 |
parents | d21c68b8f16c |
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rev | line source |
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29
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gsmfr-hand-test: yet another debug aid
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1 /* |
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2 * This program is a debug aid that allows a developer to hand-craft input |
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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 |
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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++) |
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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", |
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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 } |