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comparison trau-ul-prep/binreader.c @ 19:4ab8762be333

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trau-ul-prep: starting with gsmx2tsrc program
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Jun 2024 21:55:03 +0000
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18:b36419bbc2c4 19:4ab8762be333
1 /*
2 * Here we implement our binfile_read_frame() function.
3 */
4
5 #include <stdio.h>
6 #include <stdint.h>
7 #include "binreader.h"
8
9 int binfile_read_frame(FILE *binf, uint8_t *frame)
10 {
11 int cc, morelen;
12
13 cc = fread(frame, 1, 1, binf);
14 if (cc != 1)
15 return 0;
16 if (frame[0] == 0xBF)
17 morelen = 1;
18 else if ((frame[0] & 0xF0) == 0xC0)
19 morelen = 30;
20 else if ((frame[0] & 0xF0) == 0xD0)
21 morelen = 32;
22 else
23 return -1;
24 cc = fread(frame+1, 1, morelen, binf);
25 if (cc == morelen)
26 return 1;
27 else
28 return -2;
29 }