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comparison amrdiff/etsi-bit-rd.c @ 0:a03c87a2abc6

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amrdiff program written
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 03 Apr 2024 18:44:27 +0000
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-1:000000000000 0:a03c87a2abc6
1 /*
2 * The utility function in this module reads the bits from ETSI *.cod
3 * files, both AMR and EFR versions, either LE or BE.
4 */
5
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11 #include "etsi.h"
12 #include "amr_defs.h"
13
14 read_etsi_bits(inf, big_endian, bitvec, nwords, filename_for_errs)
15 FILE *inf;
16 uint8_t *bitvec;
17 unsigned nwords;
18 char *filename_for_errs;
19 {
20 uint8_t file_bytes[COD_FORMAT_NWORDS * 2], *sp;
21 int cc;
22 unsigned n, upper;
23
24 cc = fread(file_bytes, 2, nwords, inf);
25 if (cc == 0)
26 return 0;
27 if (cc != nwords) {
28 fprintf(stderr, "error: short read from %s\n",
29 filename_for_errs);
30 exit(1);
31 }
32 sp = file_bytes;
33 for (n = 0; n < nwords; n++) {
34 if (big_endian) {
35 upper = sp[0];
36 bitvec[n] = sp[1];
37 } else {
38 bitvec[n] = sp[0];
39 upper = sp[1];
40 }
41 if (upper && (sp[0] != 0xFF || sp[1] != 0xFF)) {
42 fprintf(stderr,
43 "error in %s: non-zero in what should be %s upper byte\n",
44 filename_for_errs, big_endian ? "BE" : "LE");
45 exit(1);
46 }
47 sp += 2;
48 }
49 return 1;
50 }