Asterisk - The Open Source Telephony Project GIT-master-2de1a68
fskmodem_int.h
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1/*
2 * Asterisk -- An open source telephony toolkit.
3 *
4 * Copyright (C) 1999 - 2005, Digium, Inc.
5 *
6 * Mark Spencer <markster@digium.com>
7 *
8 * See http://www.asterisk.org for more information about
9 * the Asterisk project. Please do not directly contact
10 * any of the maintainers of this project for assistance;
11 * the project provides a web site, mailing lists and IRC
12 * channels for your use.
13 *
14 * This program is free software, distributed under the terms of
15 * the GNU General Public License Version 2. See the LICENSE file
16 * at the top of the source tree.
17 */
18
19/*! \file
20 * \brief FSK Modem Support
21 * \note Includes code and algorithms from the Zapata library.
22 */
23
24#ifndef _ASTERISK_FSKMODEM_H
25#define _ASTERISK_FSKMODEM_H
26
27#define PARITY_NONE 0
28#define PARITY_EVEN 1
29#define PARITY_ODD 2
30
31
32#define NCOLA 0x4000
33
34/* new filter structure */
36
37 int icoefs[8];
38 int ip;
39 int ixv[8];
40 int iyv[8];
41};
42
43typedef struct {
44 int nbit; /*!< Number of Data Bits (5,7,8) */
45 int parity; /*!< Parity 0=none 1=even 2=odd */
46 int instop; /*!< Number of Stop Bits */
47 int hdlc; /*!< Modo Packet */
48 int xi0;
49 int xi1;
50 int xi2;
51
52 int ispb;
53 int icont;
54 int bw; /*!< Band Selector*/
55 int f_mark_idx; /*!< Mark Frequency Index (f_M-500)/5 */
56 int f_space_idx; /*!< Space Frequency Index (f_S-500)/5 */
57 int state;
58
59 int pllispb; /*!<Pll autosense */
60 int pllids;
62
63 struct filter_struct mark_filter;
64 struct filter_struct space_filter;
65 struct filter_struct demod_filter;
66
67} fsk_data;
68
69int fsk_serial(fsk_data *fskd, short *buffer, int *len, int *outbyte);
70int fskmodem_init(fsk_data *fskd);
71
72#endif /* _ASTERISK_FSKMODEM_H */
enum cc_state state
Definition: ccss.c:393
int fskmodem_init(fsk_data *fskd)
Definition: fskmodem_int.c:195
int fsk_serial(fsk_data *fskd, short *buffer, int *len, int *outbyte)
Retrieve a serial byte into outbyte. Buffer is a pointer into a series of shorts and len records the ...
static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
int pllispb2
Definition: fskmodem_int.h:61
int instop
Definition: fskmodem_int.h:46
int pllispb
Definition: fskmodem_int.h:59
int pllids
Definition: fskmodem_int.h:60