FreeCalypso > hg > gsm-net-reveng

annotate trau-decode/parse-main.c @ 77:729dbac9df82

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trau-decode: factor out parse-data.c
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Feb 2025 05:16:35 +0000
parents d4ee42801cdc
children 00fd38c7c8fe
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;
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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;
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28 static uint8_t in_frame_2bit[160], frame_bits[320];
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
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69 dump_raw_frame()
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70 {
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71 uint8_t *sp = frame_bits;
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72 unsigned n, m, d;
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73
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74 for (n = 0; n < 80; n++) {
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75 d = 0;
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76 for (m = 0; m < 4; m++) {
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77 d <<= 1;
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78 d |= *sp++;
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79 }
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80 printf("%x", d);
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81 }
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82 putchar('\n');
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83 }
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84
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85 static void
0
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86 process_frame()
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87 {
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88 unsigned c1_5, c6_11;
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89
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90 printf("Frame at 0x%x:\n", file_offset - 159);
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91 if (include_raw)
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92 dump_raw_frame();
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93 printf(" C1-C5: %u%u%u%u%u", frame_bits[17], frame_bits[18],
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94 frame_bits[19], frame_bits[20], frame_bits[21]);
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95 c1_5 = bits_to_num(frame_bits + 17, 5);
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96 switch (c1_5) {
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97 case 0x02:
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98 fputs(" (FR UL)", stdout);
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99 break;
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100 case 0x1C:
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101 fputs(" (FR DL)", stdout);
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102 break;
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103 case 0x1A:
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104 fputs(" (EFR)", stdout);
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105 break;
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106 case 0x10:
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107 fputs(" (idle UL)", stdout);
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108 break;
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109 case 0x0E:
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110 fputs(" (idle DL)", stdout);
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111 break;
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112 case 0x08:
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113 fputs(" (data UL)", stdout);
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114 break;
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115 case 0x16:
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116 fputs(" (data DL)", stdout);
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117 break;
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118 case 0x09:
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119 fputs(" (HR data UL)", stdout);
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120 break;
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121 case 0x17:
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122 fputs(" (HR data DL)", stdout);
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123 break;
38
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124 case 0x14:
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125 fputs(" (D144 sync)", stdout);
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126 break;
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127 case 0x1F:
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128 fputs(" (E-TRAU)", stdout);
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129 break;
47
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130 case 0x06:
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131 fputs(" (AMR)", stdout);
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132 break;
0
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133 }
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134 putchar('\n');
46
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135 if (c1_5 == 0x14)
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136 d144_state = D144_SYNC;
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137 else if (c1_5 == 0x1F &&
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138 (d144_state == D144_SYNC || d144_state == D144_EDATA))
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139 d144_state = D144_EDATA;
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140 else
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141 d144_state = NOT_D144;
2
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142 switch (c1_5) {
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143 case 0x02:
b2ef2c80fef1 trau-parse: add FR decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
144 case 0x1C:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
145 case 0x1A:
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
146 case 0x10:
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
147 case 0x0E:
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
148 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
149 printf(" C6-C11: %u\n", c6_11);
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
150 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
151 frame_bits[29], frame_bits[30], frame_bits[31]);
76
d4ee42801cdc trau-decode: factor out parse-fr-common.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 50
diff changeset
152 print_fr_efr_frame(frame_bits, c1_5);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
153 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
154 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
155 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
156 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
157 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
158 break;
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
159 case 0x08:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
160 case 0x09:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
161 case 0x16:
43
95acde708ce2 trau-parse: add knowledge of HR-data frame types
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
162 case 0x17:
38
d7674c80426c trau-parse: add decoding of data frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 10
diff changeset
163 case 0x14:
77
729dbac9df82 trau-decode: factor out parse-data.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
164 print_data_frame(frame_bits);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
165 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
166 case 0x1F:
77
729dbac9df82 trau-decode: factor out parse-data.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 76
diff changeset
167 print_edata_frame(frame_bits);
47
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
168 break;
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
169 case 0x06:
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
170 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
171 printf(" C6-C11: %u\n", c6_11);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
172 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
173 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
174 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
175 frame_bits[35]);
7119884f6afe trau-parse: rudimentary AMR decoding (C-bits)
Mychaela Falconia <falcon@freecalypso.org>
parents: 46
diff changeset
176 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
177 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
178 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
179 frame_bits[42]);
48
3d8cb2631812 trau-parse: show more info from AMR No_Speech frames
Mychaela Falconia <falcon@freecalypso.org>
parents: 47
diff changeset
180 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
181 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
182 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
183 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
184 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
185 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
186 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
187 break;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
188 default:
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
189 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
190 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
191 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
192 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
193 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
194 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
195 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
196 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
197 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
198 }
0
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
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 check_sync_zeros()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 for (i = 0; i < 16; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 if (frame_bits[i])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 return 1;
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
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 static int
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 check_sync_ones()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 int i;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 for (i = 1; i < 20; i++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 if (!frame_bits[i*16])
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 return 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 return 1;
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
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 check_sync()
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 {
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
228 int sync_res;
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
229
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
230 if (d144_state == D144_EDATA)
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
231 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
232 else
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
233 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
234 if (sync_res)
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 printf("Bad frame sync, returning to hunt state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 state = HUNT_FOR_0;
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
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 static void
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 byte_input(inb)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 switch (state) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 case HUNT_FOR_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 if (inb != 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 state = HUNT_FOUND_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 hunt_for_0_count = 1;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 case HUNT_FOUND_0:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 if (inb != 0) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 hunt_for_0_count++;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 if (hunt_for_0_count >= 8)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 state = GOT_8_ZEROS;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 case GOT_8_ZEROS:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 if (inb & 2) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 printf("Found frame sync at file offset 0x%x\n",
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 file_offset - 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 bzero(in_frame_2bit, 8);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 in_frame_2bit[8] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 frame_pos_count = 9;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 state = SYNCED;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 if (inb != 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 state = HUNT_FOR_0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 case SYNCED:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 in_frame_2bit[frame_pos_count++] = inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 if (frame_pos_count < 160)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 frame_pos_count = 0;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 unpack_dibits();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 process_frame();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 check_sync();
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 return;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 default:
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 fprintf(stderr, "BUG: bad sync state\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 abort();
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 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 main(argc, argv)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
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288 char **argv;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
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289 {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
290 char *filename, *subslot_arg;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 FILE *inf;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 int subslot, right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 int inb;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
295 switch (argc) {
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
296 case 3:
50
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
297 if (argv[1][0] == '-')
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
298 goto usage;
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
299 filename = argv[1];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
300 subslot_arg = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
301 include_raw = 0;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
302 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
303 case 4:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
304 if (strcmp(argv[1], "-r"))
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
305 goto usage;
50
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
306 if (argv[2][0] == '-')
f77a48a01ff0 trau-parse command line: parse -r more robustly
Mychaela Falconia <falcon@freecalypso.org>
parents: 49
diff changeset
307 goto usage;
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
308 filename = argv[2];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
309 subslot_arg = argv[3];
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
310 include_raw = 1;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
311 break;
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
312 default:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
313 usage:
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
314 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
315 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
317 inf = fopen(filename, "r");
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 if (!inf) {
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
319 perror(filename);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 exit(1);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 }
45
59d1d15b6f7e trau-parse: add -r option for raw frame output
Mychaela Falconia <falcon@freecalypso.org>
parents: 43
diff changeset
322 subslot = atoi(subslot_arg);
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 if (subslot < 0 || subslot > 3) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 fprintf(stderr, "error: invalid subslot argument\n");
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 exit(1);
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 right_shift = (3 - subslot) * 2;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 state = HUNT_FOR_0;
46
f977027774cb trau-parse: add support for D144 decoding
Mychaela Falconia <falcon@freecalypso.org>
parents: 45
diff changeset
329 d144_state = NOT_D144;
0
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 for (file_offset = 0; ; file_offset++) {
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 inb = getc(inf);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 if (inb < 0)
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 break;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 inb >>= right_shift;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 inb &= 3;
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 byte_input(inb);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 }
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 exit(0);
131e0f1972bb beginning of trau-parse program
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 }