FreeCalypso > hg > gsm-net-reveng

annotate trau-decode/parse-main.c @ 46:f977027774cb

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trau-parse: add support for D144 decoding
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 24 Sep 2024 17:02:59 +0000
parents 59d1d15b6f7e
children 7119884f6afe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 /*
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2 * This program reads a 64 kbit/s timeslot recording file, examines one
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3 * of the four 16 kbit/s subslots (selected), looks for GSM 08.60 TRAU
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4 * frames, and dumps whatever it finds.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12
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13 static unsigned file_offset;
45
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14 static int include_raw;
0
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15
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16 static enum {
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17 HUNT_FOR_0,
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18 HUNT_FOUND_0,
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19 GOT_8_ZEROS,
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20 SYNCED
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21 } state;
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22 static enum {
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23 NOT_D144,
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24 D144_SYNC,
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25 D144_EDATA,
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26 } d144_state;
0
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27 static unsigned hunt_for_0_count, frame_pos_count;
2
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28 static uint8_t in_frame_2bit[160], frame_bits[320], d_bits[260];
0
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29
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30 static void
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31 unpack_dibits()
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32 {
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33 int i, inb;
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34 uint8_t *op;
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35
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36 op = frame_bits;
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37 for (i = 0; i < 160; i++) {
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38 inb = in_frame_2bit[i];
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39 if (inb & 2)
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40 *op++ = 1;
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41 else
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42 *op++ = 0;
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43 if (inb & 1)
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44 *op++ = 1;
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45 else
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46 *op++ = 0;
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47 }
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48 }
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49
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50 static unsigned
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51 bits_to_num(bits, nbits)
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52 uint8_t *bits;
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53 unsigned nbits;
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54 {
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55 unsigned accum;
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56 unsigned n;
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57
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58 accum = 0;
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59 for (n = 0; n < nbits; n++) {
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60 accum <<= 1;
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61 if (*bits)
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62 accum |= 1;
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63 bits++;
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64 }
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65 return accum;
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66 }
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67
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68 static void
2
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69 collect_d_bits()
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70 {
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71 bcopy(frame_bits + 33, d_bits, 15);
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72 bcopy(frame_bits + 49, d_bits + 15, 15);
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73 bcopy(frame_bits + 65, d_bits + 30, 15);
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74 bcopy(frame_bits + 81, d_bits + 45, 15);
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75 bcopy(frame_bits + 97, d_bits + 60, 15);
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76 bcopy(frame_bits + 113, d_bits + 75, 15);
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77 bcopy(frame_bits + 129, d_bits + 90, 15);
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78 bcopy(frame_bits + 145, d_bits + 105, 15);
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79 bcopy(frame_bits + 161, d_bits + 120, 15);
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80 bcopy(frame_bits + 177, d_bits + 135, 15);
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81 bcopy(frame_bits + 193, d_bits + 150, 15);
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82 bcopy(frame_bits + 209, d_bits + 165, 15);
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83 bcopy(frame_bits + 225, d_bits + 180, 15);
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84 bcopy(frame_bits + 241, d_bits + 195, 15);
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85 bcopy(frame_bits + 257, d_bits + 210, 15);
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86 bcopy(frame_bits + 273, d_bits + 225, 15);
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87 bcopy(frame_bits + 289, d_bits + 240, 15);
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88 bcopy(frame_bits + 305, d_bits + 255, 5);
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89 }
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90
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91 static void
38
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92 print_data_subframe(nf, bits)
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93 uint8_t *bits;
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94 {
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95 unsigned nb;
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96
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97 printf(" Data frame %d:", nf);
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98 for (nb = 0; nb < 9; nb++) {
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99 printf(" %02X", bits_to_num(bits, 8));
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100 bits += 8;
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101 }
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102 putchar('\n');
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103 }
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104
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105 static void
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106 print_data_frame()
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107 {
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108 print_data_subframe(0, frame_bits + 4 * 8);
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109 print_data_subframe(1, frame_bits + 13 * 8);
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110 print_data_subframe(2, frame_bits + 22 * 8);
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111 print_data_subframe(3, frame_bits + 31 * 8);
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112 }
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113
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114 static void
45
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115 dump_raw_frame()
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116 {
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117 uint8_t *sp = frame_bits;
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118 unsigned n, m, d;
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119
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120 for (n = 0; n < 80; n++) {
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121 d = 0;
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122 for (m = 0; m < 4; m++) {
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123 d <<= 1;
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124 d |= *sp++;
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125 }
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126 printf("%x", d);
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127 }
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128 putchar('\n');
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129 }
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130
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131 static void
0
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132 process_frame()
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133 {
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134 unsigned c1_5, c6_11;
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135
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136 printf("Frame at 0x%x:\n", file_offset - 159);
45
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137 if (include_raw)
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138 dump_raw_frame();
0
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139 printf(" C1-C5: %u%u%u%u%u", frame_bits[17], frame_bits[18],
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140 frame_bits[19], frame_bits[20], frame_bits[21]);
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
141 c1_5 = bits_to_num(frame_bits + 17, 5);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 switch (c1_5) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 case 0x02:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 fputs(" (FR UL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 case 0x1C:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 fputs(" (FR DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 break;
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
149 case 0x1A:
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 fputs(" (EFR)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 case 0x10:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 fputs(" (idle UL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 case 0x0E:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 fputs(" (idle DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
158 case 0x08:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
159 fputs(" (data UL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
160 break;
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
161 case 0x16:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
162 fputs(" (data DL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
163 break;
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
164 case 0x09:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
165 fputs(" (HR data UL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
166 break;
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
167 case 0x17:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
168 fputs(" (HR data DL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
169 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
170 case 0x14:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
171 fputs(" (D144 sync)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
172 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
173 case 0x1F:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
174 fputs(" (E-TRAU)", stdout);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
175 break;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 putchar('\n');
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
178 if (c1_5 == 0x14)
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
179 d144_state = D144_SYNC;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
180 else if (c1_5 == 0x1F &&
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
181 (d144_state == D144_SYNC || d144_state == D144_EDATA))
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
182 d144_state = D144_EDATA;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
183 else
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
184 d144_state = NOT_D144;
2
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
185 switch (c1_5) {
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
186 case 0x02:
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
187 case 0x1C:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
188 case 0x1A:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
189 c6_11 = bits_to_num(frame_bits + 22, 6);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
190 printf(" C6-C11: %u\n", c6_11);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
191 printf(" C12=%u C13=%u C14=%u C15=%u\n", frame_bits[28],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
192 frame_bits[29], frame_bits[30], frame_bits[31]);
2
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
193 collect_d_bits();
4
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
194 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
195 case 0x08:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
196 case 0x09:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
197 case 0x16:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
198 case 0x17:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
199 case 0x14:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
200 printf(" C6-C15: %u%u%u%u%u%u%u%u%u%u\n", frame_bits[22],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
201 frame_bits[23], frame_bits[24], frame_bits[25],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
202 frame_bits[26], frame_bits[27], frame_bits[28],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
203 frame_bits[29], frame_bits[30], frame_bits[31]);
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
204 print_data_frame();
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
205 return;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
206 case 0x1F:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
207 printf(" C6-C13: %u%u%u%u%u%u%u%u\n", frame_bits[22],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
208 frame_bits[23], frame_bits[24], frame_bits[25],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
209 frame_bits[26], frame_bits[27], frame_bits[28],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
210 frame_bits[29]);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
211 printf(" M1=%u M2=%u\n", frame_bits[30], frame_bits[31]);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
212 return;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
213 default:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
214 printf(" C6-C15: %u%u%u%u%u%u%u%u%u%u\n", frame_bits[22],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
215 frame_bits[23], frame_bits[24], frame_bits[25],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
216 frame_bits[26], frame_bits[27], frame_bits[28],
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
217 frame_bits[29], frame_bits[30], frame_bits[31]);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
218 }
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
219 switch (c1_5) {
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
220 case 0x02:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
221 case 0x1C:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
222 print_fr_frame(d_bits);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
223 break;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
224 case 0x1A:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
225 check_efr_crc(d_bits);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
226 print_efr_frame(d_bits);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
227 break;
2
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
228 }
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 printf(" C16=%u C17=%u C18=%u C19=%u C20=%u C21=%u\n",
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 frame_bits[310], frame_bits[311], frame_bits[312],
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 frame_bits[313], frame_bits[314], frame_bits[315]);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 printf(" T1=%u T2=%u T3=%u T4=%u\n", frame_bits[316], frame_bits[317],
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 frame_bits[318], frame_bits[319]);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 check_sync_zeros()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 for (i = 0; i < 16; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 if (frame_bits[i])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 check_sync_ones()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 for (i = 1; i < 20; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 if (!frame_bits[i*16])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 check_sync()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 {
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
263 int sync_res;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
264
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
265 if (d144_state == D144_EDATA)
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
266 sync_res = check_sync_zeros() && frame_bits[16];
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
267 else
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
268 sync_res = check_sync_zeros() && check_sync_ones();
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
269 if (sync_res)
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 printf("Bad frame sync, returning to hunt state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 byte_input(inb)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 switch (state) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 case HUNT_FOR_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 state = HUNT_FOUND_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 hunt_for_0_count = 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 case HUNT_FOUND_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 if (inb != 0) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 hunt_for_0_count++;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 if (hunt_for_0_count >= 8)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 state = GOT_8_ZEROS;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 case GOT_8_ZEROS:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 if (inb & 2) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 printf("Found frame sync at file offset 0x%x\n",
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 file_offset - 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 bzero(in_frame_2bit, 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 in_frame_2bit[8] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300 frame_pos_count = 9;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 state = SYNCED;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 case SYNCED:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 in_frame_2bit[frame_pos_count++] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 if (frame_pos_count < 160)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 frame_pos_count = 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 unpack_dibits();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 process_frame();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 check_sync();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 default:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 fprintf(stderr, "BUG: bad sync state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 abort();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 main(argc, argv)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 char **argv;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
325 char *filename, *subslot_arg;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 FILE *inf;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 int subslot, right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 int inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
330 switch (argc) {
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
331 case 3:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
332 filename = argv[1];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
333 subslot_arg = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
334 include_raw = 0;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
335 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
336 case 4:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
337 if (strcmp(argv[1], "-r"))
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
338 goto usage;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
339 filename = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
340 subslot_arg = argv[3];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
341 include_raw = 1;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
342 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
343 default:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
344 usage:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
345 fprintf(stderr, "usage: %s [-r] binfile subslot\n", argv[0]);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
348 inf = fopen(filename, "r");
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 if (!inf) {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
350 perror(filename);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
353 subslot = atoi(subslot_arg);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 if (subslot < 0 || subslot > 3) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 fprintf(stderr, "error: invalid subslot argument\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 right_shift = (3 - subslot) * 2;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 state = HUNT_FOR_0;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
360 d144_state = NOT_D144;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 for (file_offset = 0; ; file_offset++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 inb = getc(inf);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 if (inb < 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 inb >>= right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366 inb &= 3;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 byte_input(inb);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369 exit(0);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370 }