73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief FSK Modem Support
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* \note Includes code and algorithms from the Zapata library.
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*/
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#ifndef _ASTERISK_FSKMODEM_H
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#define _ASTERISK_FSKMODEM_H
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#define PARITY_NONE 0
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#define PARITY_EVEN 1
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#define PARITY_ODD 2
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#define NCOLA 0x4000
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/* new filter structure */
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struct filter_struct {
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int icoefs[8];
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int ip;
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int ixv[8];
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int iyv[8];
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};
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typedef struct {
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int nbit; /*!< Number of Data Bits (5,7,8) */
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int parity; /*!< Parity 0=none 1=even 2=odd */
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int instop; /*!< Number of Stop Bits */
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int hdlc; /*!< Modo Packet */
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int xi0;
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int xi1;
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int xi2;
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int ispb;
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int icont;
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int bw; /*!< Band Selector*/
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int f_mark_idx; /*!< Mark Frequency Index (f_M-500)/5 */
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int f_space_idx; /*!< Space Frequency Index (f_S-500)/5 */
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int state;
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int pllispb; /*!<Pll autosense */
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int pllids;
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int pllispb2;
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struct filter_struct mark_filter;
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struct filter_struct space_filter;
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struct filter_struct demod_filter;
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} fsk_data;
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int fsk_serial(fsk_data *fskd, short *buffer, int *len, int *outbyte);
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int fskmodem_init(fsk_data *fskd);
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#endif /* _ASTERISK_FSKMODEM_H */
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