annotate dev/gsm0611-silence-fr.c @ 155:9814041e8096

gsmfr-encode-r utility put together
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 15 Dec 2022 01:30:59 +0000
parents 61cb83bd11ec
children e4ca04586118
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This program is meant to be run only once by the developer - it uses
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * (3GPP TS 46.011) from the table format given in the spec into
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * libgsm/RTP format.
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 */
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <stdio.h>
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <stdlib.h>
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <string.h>
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <strings.h>
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include <gsm.h>
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 static const gsm_signal lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2};
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 static const gsm_signal subframe_params[17] =
25
61cb83bd11ec GSM 06.11 silence frame: it's Nc=40 first, then bc=0
Mychaela Falconia <falcon@freecalypso.org>
parents: 1
diff changeset
16 {40, 0, 1, 0, 3, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3};
1
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 main(argc, argv)
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 char **argv;
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 {
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 gsm state;
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 gsm_signal params[76];
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 gsm_byte frame[33];
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 unsigned n;
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 /* gsm_implode() requires dummy state */
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 state = gsm_create();
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 if (!state) {
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 fprintf(stderr, "gsm_create() failed!\n");
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 exit(1);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 }
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 /* gather params */
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 bcopy(lar_params, params, sizeof(gsm_signal) * 8);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 bcopy(subframe_params, params + 8, sizeof(gsm_signal) * 17);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 bcopy(subframe_params, params + 25, sizeof(gsm_signal) * 17);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 bcopy(subframe_params, params + 42, sizeof(gsm_signal) * 17);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 bcopy(subframe_params, params + 59, sizeof(gsm_signal) * 17);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 /* generate frame */
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 gsm_implode(state, params, frame);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 /* print the frame */
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 for (n = 0; n < 33; n++) {
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 printf("0x%02X,", frame[n]);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32)
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 putchar('\n');
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 else
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 putchar(' ');
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 }
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 exit(0);
6780b23654bd libgsmfrp: starting with the silence frame
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 }