Version 0.1.7 from FTP

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@255 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/fskmodem.h

@@ -0,0 +1,63 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * FSK Modem Support 
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * 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