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_tsig_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_tsig_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

Detailed Description


Define Documentation

#define PI   3.14159265358979323

PI


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.

References power_meter_update(), SIG_TONE_1_CHANGE, SIG_TONE_1_PRESENT, SIG_TONE_2_CHANGE, SIG_TONE_2_PRESENT, SIG_TONE_RX_FILTER_TONE, and SIG_TONE_RX_PASSTHROUGH.

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.

References power_meter_init(), and power_meter_level_dbm0().

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.

References dds_mod(), SIG_TONE_1_PRESENT, SIG_TONE_2_PRESENT, SIG_TONE_TX_PASSTHROUGH, and SIG_TONE_TX_UPDATE_REQUEST.

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.

References dds_phase_rate(), and dds_scaling_dbm0().

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.

References SIG_TONE_1_PRESENT, and SIG_TONE_2_PRESENT.


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