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Diffstat (limited to 'trunk/include/asterisk/fskmodem.h')
-rw-r--r-- | trunk/include/asterisk/fskmodem.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/trunk/include/asterisk/fskmodem.h b/trunk/include/asterisk/fskmodem.h new file mode 100644 index 000000000..d50e8abde --- /dev/null +++ b/trunk/include/asterisk/fskmodem.h @@ -0,0 +1,81 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005, Digium, Inc. + * + * Mark Spencer <markster@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * \brief FSK Modem Support + * \note Includes code and algorithms from the Zapata library. + */ + +#ifndef _ASTERISK_FSKMODEM_H +#define _ASTERISK_FSKMODEM_H + +#define PARITY_NONE 0 +#define PARITY_EVEN 1 +#define PARITY_ODD 2 + + +#define NCOLA 0x4000 + +/* new filter structure */ +struct filter_struct { + + int icoefs[8]; + int ip; + int ixv[8]; + int iyv[8]; +}; + +typedef struct { + int nbit; /*!< Number of Data Bits (5,7,8) */ + int parity; /*!< Parity 0=none 1=even 2=odd */ + int instop; /*!< Number of Stop Bits */ + int hdlc; /*!< Modo Packet */ + int xi0; + int xi1; + int xi2; + + int ispb; + int icont; + int bw; /*!< Band Selector*/ + int f_mark_idx; /*!< Mark Frequency Index (f_M-500)/5 */ + int f_space_idx; /*!< Space Frequency Index (f_S-500)/5 */ + int state; + + int pllispb; /*!<Pll autosense */ + int pllids; + int pllispb2; + + struct filter_struct mark_filter; + struct filter_struct space_filter; + struct filter_struct demod_filter; + +} fsk_data; + +/* \brief Retrieve a serial byte into outbyte. + Buffer is a pointer into a series of + shorts and len records the number of bytes in the buffer. len will be + overwritten with the number of bytes left that were not consumed. + \return return value is as follows: + \arg 0: Still looking for something... + \arg 1: An output byte was received and stored in outbyte + \arg -1: An error occured in the transmission + This must be called with at least 80 bytes of buffer. */ +int fsk_serial(fsk_data *fskd, short *buffer, int *len, int *outbyte); +int fskmodem_init(fsk_data *fskd); + +#endif /* _ASTERISK_FSKMODEM_H */ |