fsk.c File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "spandsp/telephony.h"
#include "spandsp/complex.h"
#include "spandsp/dds.h"
#include "spandsp/power_meter.h"
#include "spandsp/async.h"
#include "spandsp/fsk.h"

Functions
fsk_tx_state_t *	fsk_tx_init (fsk_tx_state_t *s, fsk_spec_t *spec, get_bit_func_t get_bit, void *user_data)
	Initialise an FSK modem transmit context.
int	fsk_tx (fsk_tx_state_t *s, int16_t *amp, int len)
	Generate a block of FSK modem audio samples.
void	fsk_tx_power (fsk_tx_state_t *s, float power)
	Adjust an FSK modem transmit context's power output.
void	fsk_tx_set_get_bit (fsk_tx_state_t *s, get_bit_func_t get_bit, void *user_data)
void	fsk_rx_signal_cutoff (fsk_rx_state_t *s, float cutoff)
	Adjust an FSK modem receive context's carrier detect power threshold.
float	fsk_rx_signal_power (fsk_rx_state_t *s)
void	fsk_rx_set_put_bit (fsk_rx_state_t *s, put_bit_func_t put_bit, void *user_data)
fsk_rx_state_t *	fsk_rx_init (fsk_rx_state_t *s, fsk_spec_t *spec, int sync_mode, put_bit_func_t put_bit, void *user_data)
	Initialise an FSK modem receive context.
int	fsk_rx (fsk_rx_state_t *s, const int16_t *amp, int len)
	Process a block of received FSK modem audio samples.
Variables
fsk_spec_t	preset_fsk_specs []

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Detailed Description

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Function Documentation

int fsk_rx (  fsk_rx_state_t *  s, const int16_t *  amp, int  len )

Process a block of received FSK modem audio samples. Process a block of received FSK modem audio samples. Parameters: s  The modem context. amp  The audio sample buffer. len  The number of samples in the buffer. Returns: The number of samples unprocessed.

fsk_rx_state_t* fsk_rx_init (  fsk_rx_state_t *  s, fsk_spec_t *  spec, int  sync_mode, put_bit_func_t  put_bit, void *  user_data )

Initialise an FSK modem receive context. Initialise an FSK modem receive context. Parameters: s  The modem context. spec  The specification of the modem tones and rate. sync_mode  TRUE for synchronous modem. FALSE for asynchronous mode. put_bit  The callback routine used to put the received data. user_data  An opaque pointer. Returns: A pointer to the modem context, or NULL if there was a problem.

void fsk_rx_signal_cutoff (  fsk_rx_state_t *  s, float  cutoff )

Adjust an FSK modem receive context's carrier detect power threshold. Adjust an FSK modem receive context's carrier detect power threshold. Parameters: s  The modem context. power  The power level, in dBm0

float fsk_rx_signal_power (  fsk_rx_state_t *  s  )

Get the current received signal power. Parameters: s  The modem context. Returns: The signal power, in dBm0.

int fsk_tx (  fsk_tx_state_t *  s, int16_t *  amp, int  len )

Generate a block of FSK modem audio samples. Generate a block of FSK modem audio samples. Parameters: s  The modem context. amp  The audio sample buffer. len  The number of samples to be generated. Returns: The number of samples actually generated.

fsk_tx_state_t* fsk_tx_init (  fsk_tx_state_t *  s, fsk_spec_t *  spec, get_bit_func_t  get_bit, void *  user_data )

Initialise an FSK modem transmit context. Initialise an FSK modem transmit context. Parameters: s  The modem context. spec  The specification of the modem tones and rate. get_bit  The callback routine used to get the data to be transmitted. user_data  An opaque pointer. Returns: A pointer to the modem context, or NULL if there was a problem.

void fsk_tx_power (  fsk_tx_state_t *  s, float  power )

Adjust an FSK modem transmit context's power output. Adjust an FSK modem transmit context's power output. Parameters: s  The modem context. power  The power level, in dBm0

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