sig_tone.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include "floating_fudge.h"
#include <memory.h>
#include <string.h>
#include <limits.h>
#include "spandsp/telephony.h"
#include "spandsp/fast_convert.h"
#include "spandsp/dc_restore.h"
#include "spandsp/saturated.h"
#include "spandsp/vector_int.h"
#include "spandsp/complex.h"
#include "spandsp/power_meter.h"
#include "spandsp/dds.h"
#include "spandsp/super_tone_rx.h"
#include "spandsp/sig_tone.h"
#include "spandsp/private/sig_tone.h"

Defines
#define	PI   3.14159265358979323
Enumerations
enum	{ NOTCH_COEFF_SET_2280HZ = 0, NOTCH_COEFF_SET_2400HZ, NOTCH_COEFF_SET_2600HZ }
Functions
int	sig_tone_tx (sig_tone_tx_state_t *s, int16_t amp[], int len)
	Generate a block of signalling tone audio samples.
void	sig_tone_tx_set_mode (sig_tone_tx_state_t *s, int mode, int duration)
	Set the tone mode.
sig_tone_tx_state_t *	sig_tone_tx_init (sig_tone_tx_state_t *s, int tone_type, tone_report_func_t sig_update, void *user_data)
	Initialise a signalling tone context.
int	sig_tone_tx_release (sig_tone_tx_state_t *s)
	Release a signalling tone transmitter context.
int	sig_tone_tx_free (sig_tone_tx_state_t *s)
	Free a signalling tone transmitter context.
int	sig_tone_rx (sig_tone_rx_state_t *s, int16_t amp[], int len)
	Process a block of received audio samples.
void	sig_tone_rx_set_mode (sig_tone_rx_state_t *s, int mode, int duration)
	Set the receive mode.
sig_tone_rx_state_t *	sig_tone_rx_init (sig_tone_rx_state_t *s, int tone_type, tone_report_func_t sig_update, void *user_data)
	Initialise a signalling tone context.
int	sig_tone_rx_release (sig_tone_rx_state_t *s)
	Release a signalling tone receiver context.
int	sig_tone_rx_free (sig_tone_rx_state_t *s)
	Free a signalling tone receiver context.
Variables
int	nnn = 0

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Detailed Description

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Define Documentation

#define PI   3.14159265358979323

PI

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Function Documentation

int sig_tone_rx	(	sig_tone_rx_state_t *	s,
		int16_t	amp[],
		int	len
	)

Process a block of received audio samples.

Process a block of received audio samples.

Parameters:

	s	The signalling tone context.
	amp	The audio sample buffer.
	len	The number of samples in the buffer.

Returns:

The number of samples unprocessed.

int sig_tone_rx_free

(

sig_tone_rx_state_t *

s

)

Free a signalling tone receiver context.

Free a signalling tone receiver context.

Parameters:

s

The signalling tone context.

Returns:

0 for OK

sig_tone_rx_state_t* sig_tone_rx_init	(	sig_tone_rx_state_t *	s,
		int	tone_type,
		tone_report_func_t	sig_update,
		void *	user_data
	)

Initialise a signalling tone context.

Initialise a signalling tone receiver context.

Parameters:

	s	The signalling tone context.
	tone_type	The type of signalling tone.
	sig_update	Callback function to handle signalling updates.
	user_data	An opaque pointer.

Returns:

A pointer to the signalling tone context, or NULL if there was a problem.

int sig_tone_rx_release

(

sig_tone_rx_state_t *

s

)

Release a signalling tone receiver context.

Release a signalling tone receiver context.

Parameters:

s

The signalling tone context.

Returns:

0 for OK

void sig_tone_rx_set_mode	(	sig_tone_rx_state_t *	s,
		int	mode,
		int	duration
	)

Set the receive mode.

Set the receive mode.

Parameters:

	s	The signalling tone context.
	mode	The new mode for the receiver.
	duration	The duration for this mode, before an update is requested. A duration of zero means forever.

int sig_tone_tx	(	sig_tone_tx_state_t *	s,
		int16_t	amp[],
		int	len
	)

Generate a block of signalling tone audio samples.

Generate a block of signalling tone audio samples.

Parameters:

	s	The signalling tone context.
	amp	The audio sample buffer.
	len	The number of samples to be generated.

Returns:

The number of samples actually generated.

int sig_tone_tx_free

(

sig_tone_tx_state_t *

s

)

Free a signalling tone transmitter context.

Free a signalling tone transmitter context.

Parameters:

s

The signalling tone context.

Returns:

0 for OK

sig_tone_tx_state_t* sig_tone_tx_init	(	sig_tone_tx_state_t *	s,
		int	tone_type,
		tone_report_func_t	sig_update,
		void *	user_data
	)

Initialise a signalling tone context.

Initialise a signalling tone transmitter context.

Parameters:

	s	The signalling tone context.
	tone_type	The type of signalling tone.
	sig_update	Callback function to handle signalling updates.
	user_data	An opaque pointer.

Returns:

A pointer to the signalling tone context, or NULL if there was a problem.

int sig_tone_tx_release

(

sig_tone_tx_state_t *

s

)

Release a signalling tone transmitter context.

Release a signalling tone transmitter context.

Parameters:

s

The signalling tone context.

Returns:

0 for OK

void sig_tone_tx_set_mode	(	sig_tone_tx_state_t *	s,
		int	mode,
		int	duration
	)

Set the tone mode.

Set the tone mode.

Parameters:

	s	The signalling tone context.
	mode	The new mode for the transmitted tones.
	duration	The duration for this mode, before an update is requested. A duration of zero means forever.

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