FreeCalypso > hg > gsm-net-reveng

annotate trau-decode/parse-main.c @ 64:0364d77aca58 default tip

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d144: generate hex version of Nokia TCSM2 A-TRAU capture
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 25 Sep 2024 18:57:54 +0000
parents f77a48a01ff0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 * This program reads a 64 kbit/s timeslot recording file, examines one
131e0f1972bb beginning of trau-parse program
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3 * of the four 16 kbit/s subslots (selected), looks for GSM 08.60 TRAU
131e0f1972bb beginning of trau-parse program
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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
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92 print_fr_efr_frame(c1_5)
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93 unsigned c1_5;
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94 {
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95 switch (c1_5) {
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96 case 0x02:
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97 case 0x1C:
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98 collect_d_bits();
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99 print_fr_frame(d_bits);
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100 break;
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101 case 0x1A:
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102 collect_d_bits();
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103 check_efr_crc(d_bits);
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104 print_efr_frame(d_bits);
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105 break;
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106 }
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107 }
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108
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109 static void
38
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110 print_data_subframe(nf, bits)
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111 uint8_t *bits;
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112 {
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113 unsigned nb;
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114
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115 printf(" Data frame %d:", nf);
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116 for (nb = 0; nb < 9; nb++) {
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117 printf(" %02X", bits_to_num(bits, 8));
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118 bits += 8;
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119 }
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120 putchar('\n');
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121 }
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122
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123 static void
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124 print_data_frame()
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125 {
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126 print_data_subframe(0, frame_bits + 4 * 8);
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127 print_data_subframe(1, frame_bits + 13 * 8);
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128 print_data_subframe(2, frame_bits + 22 * 8);
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129 print_data_subframe(3, frame_bits + 31 * 8);
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130 }
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131
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132 static void
45
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133 dump_raw_frame()
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134 {
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135 uint8_t *sp = frame_bits;
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136 unsigned n, m, d;
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137
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138 for (n = 0; n < 80; n++) {
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139 d = 0;
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diff changeset
140 for (m = 0; m < 4; m++) {
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
141 d <<= 1;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
142 d |= *sp++;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
143 }
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
144 printf("%x", d);
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
145 }
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
146 putchar('\n');
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
147 }
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
148
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
149 static void
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 process_frame()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 unsigned c1_5, c6_11;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153
10
4d1732e4a143 trau-parse: frame offsets were reported off by one byte
Mychaela Falconia <falcon@freecalypso.org>
parents: 5
diff changeset
154 printf("Frame at 0x%x:\n", file_offset - 159);
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
155 if (include_raw)
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
156 dump_raw_frame();
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 printf(" C1-C5: %u%u%u%u%u", frame_bits[17], frame_bits[18],
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 frame_bits[19], frame_bits[20], frame_bits[21]);
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
159 c1_5 = bits_to_num(frame_bits + 17, 5);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 switch (c1_5) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 case 0x02:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 fputs(" (FR UL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 case 0x1C:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 fputs(" (FR DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 break;
1
b0dcd48a1c8a trau-parse: initial bugfixes
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
167 case 0x1A:
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 fputs(" (EFR)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 case 0x10:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 fputs(" (idle UL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 case 0x0E:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 fputs(" (idle DL)", stdout);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
176 case 0x08:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
177 fputs(" (data UL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
178 break;
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
179 case 0x16:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
180 fputs(" (data DL)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
181 break;
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
182 case 0x09:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
183 fputs(" (HR data UL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
184 break;
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
185 case 0x17:
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
186 fputs(" (HR data DL)", stdout);
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
187 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
188 case 0x14:
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
189 fputs(" (D144 sync)", stdout);
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
190 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
191 case 0x1F:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
192 fputs(" (E-TRAU)", stdout);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
193 break;
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
194 case 0x06:
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
195 fputs(" (AMR)", stdout);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
196 break;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 putchar('\n');
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
199 if (c1_5 == 0x14)
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
200 d144_state = D144_SYNC;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
201 else if (c1_5 == 0x1F &&
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
202 (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
203 d144_state = D144_EDATA;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
204 else
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
205 d144_state = NOT_D144;
2
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
206 switch (c1_5) {
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
207 case 0x02:
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
208 case 0x1C:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
209 case 0x1A:
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
210 case 0x10:
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
211 case 0x0E:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
212 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
213 printf(" C6-C11: %u\n", c6_11);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
214 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
215 frame_bits[29], frame_bits[30], frame_bits[31]);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
216 print_fr_efr_frame(c1_5);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
217 printf(" C16=%u C17=%u C18=%u C19=%u C20=%u C21=%u\n",
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
218 frame_bits[310], frame_bits[311], frame_bits[312],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
219 frame_bits[313], frame_bits[314], frame_bits[315]);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
220 printf(" T1=%u T2=%u T3=%u T4=%u\n", frame_bits[316],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
221 frame_bits[317], frame_bits[318], frame_bits[319]);
4
d9c095357c32 trau-parse: check and report EFR CRC
Mychaela Falconia <falcon@freecalypso.org>
parents: 2
diff changeset
222 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
223 case 0x08:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
224 case 0x09:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
225 case 0x16:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
226 case 0x17:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
227 case 0x14:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
228 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
229 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
230 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
231 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
232 print_data_frame();
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
233 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
234 case 0x1F:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
235 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
236 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
237 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
238 frame_bits[29]);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
239 printf(" M1=%u M2=%u\n", frame_bits[30], frame_bits[31]);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
240 break;
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
241 case 0x06:
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
242 c6_11 = bits_to_num(frame_bits + 22, 6);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
243 printf(" C6-C11: %u\n", c6_11);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
244 printf(" RIF=%u C13=%u Config_Prot=%u%u%u Msg_No=%u%u\n",
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
245 frame_bits[28], frame_bits[29], frame_bits[30],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
246 frame_bits[31], frame_bits[33], frame_bits[34],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
247 frame_bits[35]);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
248 printf(" DTXd=%u TFOE=%u FClass=%u%u CMI/CMR=%u%u%u\n",
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
249 frame_bits[36], frame_bits[37], frame_bits[38],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
250 frame_bits[39], frame_bits[40], frame_bits[41],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
251 frame_bits[42]);
48
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
252 if (!frame_bits[38] && !frame_bits[39])
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
253 printf(" No_Spch_Class=%u%u%u CMI=%u%u%u CMR=%u%u%u\n",
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
254 frame_bits[76], frame_bits[77], frame_bits[78],
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
255 frame_bits[79], frame_bits[81], frame_bits[82],
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
256 frame_bits[83], frame_bits[84], frame_bits[85]);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
257 printf(" T1=%u T2=%u T3=%u T4=%u\n", frame_bits[316],
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
258 frame_bits[317], frame_bits[318], frame_bits[319]);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
259 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
260 default:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
261 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
262 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
263 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
264 frame_bits[29], frame_bits[30], frame_bits[31]);
49
e579784e5578 trau-parse: restore FR-like display for unknown frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
265 printf(" C16=%u C17=%u C18=%u C19=%u C20=%u C21=%u\n",
e579784e5578 trau-parse: restore FR-like display for unknown frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
266 frame_bits[310], frame_bits[311], frame_bits[312],
e579784e5578 trau-parse: restore FR-like display for unknown frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
267 frame_bits[313], frame_bits[314], frame_bits[315]);
e579784e5578 trau-parse: restore FR-like display for unknown frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
268 printf(" T1=%u T2=%u T3=%u T4=%u\n", frame_bits[316],
e579784e5578 trau-parse: restore FR-like display for unknown frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 48
diff changeset
269 frame_bits[317], frame_bits[318], frame_bits[319]);
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
270 }
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 check_sync_zeros()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 int i;
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 for (i = 0; i < 16; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 if (frame_bits[i])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 check_sync_ones()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 int i;
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 for (i = 1; i < 20; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 if (!frame_bits[i*16])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 return 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 check_sync()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 {
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
300 int sync_res;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
301
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
302 if (d144_state == D144_EDATA)
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
303 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
304 else
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
305 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
306 if (sync_res)
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 printf("Bad frame sync, returning to hunt state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 byte_input(inb)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 switch (state) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 case HUNT_FOR_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 state = HUNT_FOUND_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 hunt_for_0_count = 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 case HUNT_FOUND_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 if (inb != 0) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 hunt_for_0_count++;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 if (hunt_for_0_count >= 8)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 state = GOT_8_ZEROS;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 case GOT_8_ZEROS:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 if (inb & 2) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 printf("Found frame sync at file offset 0x%x\n",
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 file_offset - 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 bzero(in_frame_2bit, 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 in_frame_2bit[8] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 frame_pos_count = 9;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 state = SYNCED;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 case SYNCED:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 in_frame_2bit[frame_pos_count++] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 if (frame_pos_count < 160)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 frame_pos_count = 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 unpack_dibits();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 process_frame();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 check_sync();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 default:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 fprintf(stderr, "BUG: bad sync state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 abort();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 }
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
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 main(argc, argv)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360 char **argv;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
362 char *filename, *subslot_arg;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 FILE *inf;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364 int subslot, right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 int inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
367 switch (argc) {
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
368 case 3:
50
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
369 if (argv[1][0] == '-')
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
370 goto usage;
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
371 filename = argv[1];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
372 subslot_arg = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
373 include_raw = 0;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
374 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
375 case 4:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
376 if (strcmp(argv[1], "-r"))
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
377 goto usage;
50
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
378 if (argv[2][0] == '-')
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
379 goto usage;
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
380 filename = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
381 subslot_arg = argv[3];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
382 include_raw = 1;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
383 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
384 default:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
385 usage:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
386 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
387 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
389 inf = fopen(filename, "r");
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 if (!inf) {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
391 perror(filename);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
394 subslot = atoi(subslot_arg);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 if (subslot < 0 || subslot > 3) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 fprintf(stderr, "error: invalid subslot argument\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 right_shift = (3 - subslot) * 2;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 state = HUNT_FOR_0;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
401 d144_state = NOT_D144;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 for (file_offset = 0; ; file_offset++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 inb = getc(inf);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 if (inb < 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 inb >>= right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 inb &= 3;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 byte_input(inb);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 exit(0);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 }