mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-23 23:12:31 +00:00
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/*
|
|
* 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.
|
|
* \todo Translate Emiliano Zapata's spanish comments to english, please.
|
|
*/
|
|
|
|
#ifndef _ASTERISK_FSKMODEM_H
|
|
#define _ASTERISK_FSKMODEM_H
|
|
|
|
#define PARITY_NONE 0
|
|
#define PARITY_EVEN 1
|
|
#define PARITY_ODD 2
|
|
|
|
|
|
#define NCOLA 0x4000
|
|
|
|
typedef struct {
|
|
float spb; /*!< Samples / Bit */
|
|
int nbit; /*!< Number of Data Bits (5,7,8) */
|
|
float nstop; /*!< Number of Stop Bits 1,1.5,2 */
|
|
int paridad; /*!< Parity 0=none 1=even 2=odd */
|
|
int hdlc; /*!< Modo Packet */
|
|
float x0;
|
|
float x1;
|
|
float x2;
|
|
float cont;
|
|
int bw; /*!< Ancho de Banda */
|
|
double fmxv[8],fmyv[8]; /*!< filter stuff for M filter */
|
|
int fmp; /*!< pointer for M filter */
|
|
double fsxv[8],fsyv[8]; /*!< filter stuff for S filter */
|
|
int fsp; /*!< pointer for S filter */
|
|
double flxv[8],flyv[8]; /*!< filter stuff for L filter */
|
|
int flp; /*!< pointer for L filter */
|
|
int f_mark_idx; /*!< Indice de frecuencia de marca (f_M-500)/5 */
|
|
int f_space_idx; /*!< Indice de frecuencia de espacio (f_S-500)/5 */
|
|
int state;
|
|
int pcola; /*!< Puntero de las colas de datos */
|
|
float cola_in[NCOLA]; /*!< Cola de muestras de entrada */
|
|
float cola_filtro[NCOLA]; /*!< Cola de muestras tras filtros */
|
|
float cola_demod[NCOLA]; /*!< Cola de muestras demoduladas */
|
|
} 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
|
|
He must be called with at least 80 bytes of buffer. */
|
|
int fsk_serie(fsk_data *fskd, short *buffer, int *len, int *outbyte);
|
|
|
|
#endif /* _ASTERISK_FSKMODEM_H */
|