spandsp 3.0.0
modem_connect_tones.c File Reference
#include <inttypes.h>
#include <stdlib.h>
#include <memory.h>
#include "spandsp/stdbool.h"
#include "floating_fudge.h"
#include <stdio.h>
#include "spandsp/telephony.h"
#include "spandsp/alloc.h"
#include "spandsp/fast_convert.h"
#include "spandsp/logging.h"
#include "spandsp/complex.h"
#include "spandsp/dds.h"
#include "spandsp/tone_detect.h"
#include "spandsp/tone_generate.h"
#include "spandsp/super_tone_rx.h"
#include "spandsp/power_meter.h"
#include "spandsp/async.h"
#include "spandsp/fsk.h"
#include "spandsp/modem_connect_tones.h"
#include "spandsp/private/power_meter.h"
#include "spandsp/private/fsk.h"
#include "spandsp/private/modem_connect_tones.h"

Macros

#define HDLC_FRAMING_OK_THRESHOLD   5
 

Functions

const char * modem_connect_tone_to_str (int tone)
 
int modem_connect_tones_tx (modem_connect_tones_tx_state_t *s, int16_t amp[], int len)
 Generate a block of modem connect tones samples.
 
modem_connect_tones_tx_state_tmodem_connect_tones_tx_init (modem_connect_tones_tx_state_t *s, int tone_type)
 Initialise an instance of the modem connect tones generator.
 
int modem_connect_tones_tx_release (modem_connect_tones_tx_state_t *s)
 Release an instance of the modem connect tones generator.
 
int modem_connect_tones_tx_free (modem_connect_tones_tx_state_t *s)
 Free an instance of the modem connect tones generator.
 
int modem_connect_tones_rx (modem_connect_tones_rx_state_t *s, const int16_t amp[], int len)
 Process a block of samples through an instance of the modem connect tones detector.
 
int modem_connect_tones_rx_fillin (modem_connect_tones_rx_state_t *s, int len)
 Fake processing of a missing block of received modem connect tone samples.
 
int modem_connect_tones_rx_get (modem_connect_tones_rx_state_t *s)
 Test if a modem_connect tone has been detected.
 
modem_connect_tones_rx_state_tmodem_connect_tones_rx_init (modem_connect_tones_rx_state_t *s, int tone_type, tone_report_func_t tone_callback, void *user_data)
 Initialise an instance of the modem connect tones detector.
 
int modem_connect_tones_rx_release (modem_connect_tones_rx_state_t *s)
 Release an instance of the modem connect tones detector.
 
int modem_connect_tones_rx_free (modem_connect_tones_rx_state_t *s)
 Free an instance of the modem connect tones detector.
 

Function Documentation

◆ modem_connect_tones_rx()

◆ modem_connect_tones_rx_fillin()

int modem_connect_tones_rx_fillin ( modem_connect_tones_rx_state_t s,
int  len 
)

Fake processing of a missing block of received modem connect tone samples.

Fake processing of a missing block of received modem connect tone samples (e.g due to packet loss).

Parameters
sThe context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

◆ modem_connect_tones_rx_free()

int modem_connect_tones_rx_free ( modem_connect_tones_rx_state_t s)

Free an instance of the modem connect tones detector.

Parameters
sThe context.
Returns
0 for OK, else -1.

◆ modem_connect_tones_rx_get()

int modem_connect_tones_rx_get ( modem_connect_tones_rx_state_t s)

Test if a modem_connect tone has been detected.

Parameters
sThe context.
Returns
The code for the detected tone.

References modem_connect_tones_rx_state_s::hit, and MODEM_CONNECT_TONES_NONE.

Referenced by v8_rx().

◆ modem_connect_tones_rx_init()

◆ modem_connect_tones_rx_release()

int modem_connect_tones_rx_release ( modem_connect_tones_rx_state_t s)

Release an instance of the modem connect tones detector.

Parameters
sThe context.
Returns
0 for OK, else -1.

◆ modem_connect_tones_tx()

int modem_connect_tones_tx ( modem_connect_tones_tx_state_t s,
int16_t  amp[],
int  len 
)

Generate a block of modem connect tones samples.

Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples to generate.
Returns
The number of samples generated.

References dds_mod(), modem_connect_tones_tx_state_s::duration_timer, modem_connect_tones_tx_state_s::hop_timer, MODEM_CONNECT_TONES_ANS, MODEM_CONNECT_TONES_ANS_PR, MODEM_CONNECT_TONES_ANSAM, MODEM_CONNECT_TONES_ANSAM_PR, MODEM_CONNECT_TONES_BELL_ANS, MODEM_CONNECT_TONES_CALLING_TONE, and MODEM_CONNECT_TONES_FAX_CNG.

Referenced by v8_tx().

◆ modem_connect_tones_tx_free()

int modem_connect_tones_tx_free ( modem_connect_tones_tx_state_t s)

Free an instance of the modem connect tones generator.

Parameters
sThe context.
Returns
0 for OK, else -1.

◆ modem_connect_tones_tx_init()

◆ modem_connect_tones_tx_release()

int modem_connect_tones_tx_release ( modem_connect_tones_tx_state_t s)

Release an instance of the modem connect tones generator.

Parameters
sThe context.
Returns
0 for OK, else -1.