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comparison trau-decode/parse-amr.c @ 78:00fd38c7c8fe

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trau-decode: factor out parse-amr.c
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 08 Feb 2025 06:22:45 +0000
parents trau-decode/parse-main.c@729dbac9df82
children 8c1f20e845a1
comparison
equal deleted inserted replaced
77:729dbac9df82 78:00fd38c7c8fe
1 /*
2 * This module contains a bit of code that has been factored out of
3 * trau-parse program; it handles AMR frames.
4 */
5
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11
12 static unsigned
13 bits_to_num(bits, nbits)
14 uint8_t *bits;
15 unsigned nbits;
16 {
17 unsigned accum;
18 unsigned n;
19
20 accum = 0;
21 for (n = 0; n < nbits; n++) {
22 accum <<= 1;
23 if (*bits)
24 accum |= 1;
25 bits++;
26 }
27 return accum;
28 }
29
30 void
31 print_amr_frame(frame_bits)
32 uint8_t *frame_bits;
33 {
34 unsigned c6_11;
35
36 c6_11 = bits_to_num(frame_bits + 22, 6);
37 printf(" C6-C11: %u\n", c6_11);
38 printf(" RIF=%u C13=%u Config_Prot=%u%u%u Msg_No=%u%u\n",
39 frame_bits[28], frame_bits[29], frame_bits[30],
40 frame_bits[31], frame_bits[33], frame_bits[34],
41 frame_bits[35]);
42 printf(" DTXd=%u TFOE=%u FClass=%u%u CMI/CMR=%u%u%u\n",
43 frame_bits[36], frame_bits[37], frame_bits[38],
44 frame_bits[39], frame_bits[40], frame_bits[41],
45 frame_bits[42]);
46 if (!frame_bits[38] && !frame_bits[39])
47 printf(" No_Spch_Class=%u%u%u CMI=%u%u%u CMR=%u%u%u\n",
48 frame_bits[76], frame_bits[77], frame_bits[78],
49 frame_bits[79], frame_bits[81], frame_bits[82],
50 frame_bits[83], frame_bits[84], frame_bits[85]);
51 printf(" T1=%u T2=%u T3=%u T4=%u\n", frame_bits[316],
52 frame_bits[317], frame_bits[318], frame_bits[319]);
53 }