From 1e7fcc6509cefd00a157d8815ce97bfce0809a84 Mon Sep 17 00:00:00 2001 From: markster Date: Sat, 24 Mar 2001 02:45:02 +0000 Subject: Version 0.1.7 from FTP git-svn-id: http://svn.digium.com/svn/asterisk/trunk@255 f38db490-d61c-443f-a65b-d21fe96a405b --- include/asterisk/fskmodem.h | 63 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100755 include/asterisk/fskmodem.h (limited to 'include/asterisk') diff --git a/include/asterisk/fskmodem.h b/include/asterisk/fskmodem.h new file mode 100755 index 000000000..61a77449f --- /dev/null +++ b/include/asterisk/fskmodem.h @@ -0,0 +1,63 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * FSK Modem Support + * + * Copyright (C) 1999, Mark Spencer + * + * Mark Spencer + * + * This program is free software, distributed under the terms of + * the GNU General Public License. + * + * Includes code and algorithms from the Zapata library. + * + */ + +#ifndef _FSKMODEM_H +#define _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; + +/* 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, and the + return value is as follows: + 0: Still looking for something... + 1: An output byte was received and stored in outbyte + -1: An error occured in the transmission + He must be called with at least 80 bytes of buffer. */ +extern int fsk_serie(fsk_data *fskd, short *buffer, int *len, int *outbyte); + +#endif -- cgit v1.2.3