FreeCalypso > hg > gsm-net-reveng

annotate trau-decode/parse-main.c @ 45:59d1d15b6f7e

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trau-parse: add -r option for raw frame output
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 13 Sep 2024 17:37:21 +0000
parents 95acde708ce2
children f977027774cb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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Mychaela Falconia <falcon@freecalypso.org>
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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 unsigned hunt_for_0_count, frame_pos_count;
2
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23 static uint8_t in_frame_2bit[160], frame_bits[320], d_bits[260];
0
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24
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25 static void
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26 unpack_dibits()
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27 {
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28 int i, inb;
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29 uint8_t *op;
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30
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31 op = frame_bits;
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32 for (i = 0; i < 160; i++) {
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33 inb = in_frame_2bit[i];
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34 if (inb & 2)
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35 *op++ = 1;
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36 else
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37 *op++ = 0;
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38 if (inb & 1)
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39 *op++ = 1;
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40 else
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41 *op++ = 0;
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42 }
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43 }
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44
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45 static unsigned
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46 bits_to_num(bits, nbits)
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47 uint8_t *bits;
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48 unsigned nbits;
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49 {
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50 unsigned accum;
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51 unsigned n;
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52
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53 accum = 0;
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54 for (n = 0; n < nbits; n++) {
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55 accum <<= 1;
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56 if (*bits)
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57 accum |= 1;
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58 bits++;
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59 }
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60 return accum;
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61 }
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62
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63 static void
2
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64 collect_d_bits()
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65 {
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66 bcopy(frame_bits + 33, d_bits, 15);
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67 bcopy(frame_bits + 49, d_bits + 15, 15);
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68 bcopy(frame_bits + 65, d_bits + 30, 15);
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69 bcopy(frame_bits + 81, d_bits + 45, 15);
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70 bcopy(frame_bits + 97, d_bits + 60, 15);
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71 bcopy(frame_bits + 113, d_bits + 75, 15);
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72 bcopy(frame_bits + 129, d_bits + 90, 15);
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73 bcopy(frame_bits + 145, d_bits + 105, 15);
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74 bcopy(frame_bits + 161, d_bits + 120, 15);
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75 bcopy(frame_bits + 177, d_bits + 135, 15);
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76 bcopy(frame_bits + 193, d_bits + 150, 15);
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77 bcopy(frame_bits + 209, d_bits + 165, 15);
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78 bcopy(frame_bits + 225, d_bits + 180, 15);
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79 bcopy(frame_bits + 241, d_bits + 195, 15);
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80 bcopy(frame_bits + 257, d_bits + 210, 15);
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81 bcopy(frame_bits + 273, d_bits + 225, 15);
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82 bcopy(frame_bits + 289, d_bits + 240, 15);
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83 bcopy(frame_bits + 305, d_bits + 255, 5);
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84 }
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85
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86 static void
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87 print_data_subframe(nf, bits)
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88 uint8_t *bits;
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89 {
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90 unsigned nb;
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91
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92 printf(" Data frame %d:", nf);
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93 for (nb = 0; nb < 9; nb++) {
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94 printf(" %02X", bits_to_num(bits, 8));
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95 bits += 8;
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96 }
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97 putchar('\n');
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98 }
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99
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100 static void
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101 print_data_frame()
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102 {
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103 print_data_subframe(0, frame_bits + 4 * 8);
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104 print_data_subframe(1, frame_bits + 13 * 8);
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105 print_data_subframe(2, frame_bits + 22 * 8);
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106 print_data_subframe(3, frame_bits + 31 * 8);
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107 }
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108
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109 static void
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110 dump_raw_frame()
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111 {
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112 uint8_t *sp = frame_bits;
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113 unsigned n, m, d;
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114
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115 for (n = 0; n < 80; n++) {
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116 d = 0;
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117 for (m = 0; m < 4; m++) {
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118 d <<= 1;
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119 d |= *sp++;
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120 }
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121 printf("%x", d);
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122 }
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123 putchar('\n');
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124 }
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125
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126 static void
0
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127 process_frame()
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128 {
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129 unsigned c1_5, c6_11;
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130
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131 printf("Frame at 0x%x:\n", file_offset - 159);
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132 if (include_raw)
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133 dump_raw_frame();
0
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134 printf(" C1-C5: %u%u%u%u%u", frame_bits[17], frame_bits[18],
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135 frame_bits[19], frame_bits[20], frame_bits[21]);
1
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136 c1_5 = bits_to_num(frame_bits + 17, 5);
0
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137 switch (c1_5) {
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138 case 0x02:
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139 fputs(" (FR UL)", stdout);
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140 break;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 case 0x1C:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 fputs(" (FR DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 break;
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
144 case 0x1A:
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 fputs(" (EFR)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 case 0x10:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 fputs(" (idle UL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 case 0x0E:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 fputs(" (idle DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
153 case 0x08:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
154 fputs(" (data UL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
155 break;
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
156 case 0x16:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
157 fputs(" (data DL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
158 break;
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
159 case 0x09:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
160 fputs(" (HR data UL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
161 break;
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
162 case 0x17:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
163 fputs(" (HR data DL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
164 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
165 case 0x14:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
166 fputs(" (D144 sync)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
167 break;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 putchar('\n');
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
170 c6_11 = bits_to_num(frame_bits + 22, 6);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 printf(" C6-C11: %u\n", c6_11);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 printf(" C12=%u C13=%u C14=%u C15=%u\n", frame_bits[28],
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 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
174 switch (c1_5) {
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
175 case 0x02:
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
176 case 0x1C:
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
177 collect_d_bits();
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
178 print_fr_frame(d_bits);
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
179 break;
4
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
180 case 0x1A:
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
181 collect_d_bits();
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
182 check_efr_crc(d_bits);
5
bf5c9fb431b8 trau-parse: implement EFR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 4
diff changeset
183 print_efr_frame(d_bits);
4
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
184 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
185 case 0x08:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
186 case 0x09:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
187 case 0x16:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
188 case 0x17:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
189 case 0x14:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
190 print_data_frame();
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
191 return;
2
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
192 }
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 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
194 frame_bits[310], frame_bits[311], frame_bits[312],
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 frame_bits[313], frame_bits[314], frame_bits[315]);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 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
197 frame_bits[318], frame_bits[319]);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 check_sync_zeros()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 for (i = 0; i < 16; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 if (frame_bits[i])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 check_sync_ones()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 for (i = 1; i < 20; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 if (!frame_bits[i*16])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 check_sync()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 if (check_sync_zeros() && check_sync_ones())
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 printf("Bad frame sync, returning to hunt state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 byte_input(inb)
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 switch (state) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 case HUNT_FOR_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 state = HUNT_FOUND_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 hunt_for_0_count = 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 case HUNT_FOUND_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 if (inb != 0) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 return;
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 hunt_for_0_count++;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 if (hunt_for_0_count >= 8)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 state = GOT_8_ZEROS;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 case GOT_8_ZEROS:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 if (inb & 2) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 printf("Found frame sync at file offset 0x%x\n",
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 file_offset - 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 bzero(in_frame_2bit, 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 in_frame_2bit[8] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 frame_pos_count = 9;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 state = SYNCED;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 case SYNCED:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 in_frame_2bit[frame_pos_count++] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 if (frame_pos_count < 160)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 frame_pos_count = 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 unpack_dibits();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 process_frame();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 check_sync();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 default:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 fprintf(stderr, "BUG: bad sync state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 abort();
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 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 main(argc, argv)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 char **argv;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
283 char *filename, *subslot_arg;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 FILE *inf;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 int subslot, right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 int inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
288 switch (argc) {
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
289 case 3:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
290 filename = argv[1];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
291 subslot_arg = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
292 include_raw = 0;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
293 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
294 case 4:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
295 if (strcmp(argv[1], "-r"))
59d1d15b6f7e trau-parse: add -r option for raw frame output
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diff changeset
296 goto usage;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
297 filename = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
298 subslot_arg = argv[3];
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diff changeset
299 include_raw = 1;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
300 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
301 default:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
302 usage:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
303 fprintf(stderr, "usage: %s [-r] binfile subslot\n", argv[0]);
0
131e0f1972bb beginning of trau-parse program
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parents:
diff changeset
304 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
306 inf = fopen(filename, "r");
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 if (!inf) {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
308 perror(filename);
0
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
311 subslot = atoi(subslot_arg);
0
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 if (subslot < 0 || subslot > 3) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 fprintf(stderr, "error: invalid subslot argument\n");
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parents:
diff changeset
314 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 right_shift = (3 - subslot) * 2;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 state = HUNT_FOR_0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 for (file_offset = 0; ; file_offset++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 inb = getc(inf);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 if (inb < 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 inb >>= right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 inb &= 3;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 byte_input(inb);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 exit(0);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 }