spandsp 3.0.0
private/fsk.h
1/*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * private/fsk.h - FSK modem transmit and receive parts
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2003 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Lesser General Public License version 2.1,
14 * as published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26#if !defined(_SPANDSP_PRIVATE_FSK_H_)
27#define _SPANDSP_PRIVATE_FSK_H_
28
29/*!
30 FSK modem transmit descriptor. This defines the state of a single working
31 instance of an FSK modem transmitter.
32*/
34{
35 int baud_rate;
36 /*! \brief The callback function used to get the next bit to be transmitted. */
38 /*! \brief A user specified opaque pointer passed to the get_bit function. */
40
41 /*! \brief The callback function used to report modem status changes. */
43 /*! \brief A user specified opaque pointer passed to the status function. */
45
46 int32_t phase_rates[2];
47 int16_t scaling;
48 int32_t current_phase_rate;
49 uint32_t phase_acc;
50 int baud_frac;
51 int shutdown;
52};
53
54/*!
55 FSK modem receive descriptor. This defines the state of a single working
56 instance of an FSK modem receiver.
57*/
59{
60 int baud_rate;
61 /*! \brief Synchronous/asynchronous/framed control */
63 int data_bits;
64 int parity;
65 int stop_bits;
66 int total_data_bits;
67 /*! \brief The callback function used to put each bit received. */
69 /*! \brief A user specified opaque pointer passed to the put_bit routine. */
71
72 /*! \brief The callback function used to report modem status changes. */
74 /*! \brief A user specified opaque pointer passed to the status function. */
76
77 int32_t carrier_on_power;
78 int32_t carrier_off_power;
79 power_meter_t power;
80 /*! \brief The value of the last signal sample, using the a simple HPF for signal power estimation. */
81 int16_t last_sample;
82 /*! \brief >0 if a signal above the minimum is present. It may or may not be a V.29 signal. */
84
85 int32_t phase_rate[2];
86 uint32_t phase_acc[2];
87
88 int correlation_span;
89
90 complexi32_t window[2][FSK_MAX_WINDOW_LEN];
91 complexi32_t dot[2];
92 int buf_ptr;
93
94 int frame_pos;
95 uint16_t frame_in_progress;
96 int baud_phase;
97 int last_bit;
98 int scaling_shift;
99
100 /*! A count of the number of parity errors seen. */
102 /*! A count of the number of character framing errors seen. */
104};
105
106#endif
107/*- End of file ------------------------------------------------------------*/
int(* span_get_bit_func_t)(void *user_data)
Definition async.h:127
void(* span_modem_status_func_t)(void *user_data, int status)
Definition async.h:131
void(* span_put_bit_func_t)(void *user_data, int bit)
Definition async.h:123
Definition complex.h:100
Definition private/fsk.h:59
span_put_bit_func_t put_bit
The callback function used to put each bit received.
Definition private/fsk.h:68
int parity_errors
Definition private/fsk.h:101
int signal_present
>0 if a signal above the minimum is present. It may or may not be a V.29 signal.
Definition private/fsk.h:83
int framing_errors
Definition private/fsk.h:103
int16_t last_sample
The value of the last signal sample, using the a simple HPF for signal power estimation.
Definition private/fsk.h:81
int framing_mode
Synchronous/asynchronous/framed control.
Definition private/fsk.h:62
void * put_bit_user_data
A user specified opaque pointer passed to the put_bit routine.
Definition private/fsk.h:70
span_modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition private/fsk.h:73
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition private/fsk.h:75
Definition private/fsk.h:34
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition private/fsk.h:44
void * get_bit_user_data
A user specified opaque pointer passed to the get_bit function.
Definition private/fsk.h:39
span_modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition private/fsk.h:42
span_get_bit_func_t get_bit
The callback function used to get the next bit to be transmitted.
Definition private/fsk.h:37