#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. More...

modem_connect_tones_tx_state_t *	modem_connect_tones_tx_init (modem_connect_tones_tx_state_t *s, int tone_type)
	Initialise an instance of the modem connect tones generator. More...

int	modem_connect_tones_tx_release (modem_connect_tones_tx_state_t *s)
	Release an instance of the modem connect tones generator. More...

int	modem_connect_tones_tx_free (modem_connect_tones_tx_state_t *s)
	Free an instance of the modem connect tones generator. More...

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. More...

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. More...

int	modem_connect_tones_rx_get (modem_connect_tones_rx_state_t *s)
	Test if a modem_connect tone has been detected. More...

modem_connect_tones_rx_state_t *	modem_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. More...

int	modem_connect_tones_rx_release (modem_connect_tones_rx_state_t *s)
	Release an instance of the modem connect tones detector. More...

int	modem_connect_tones_rx_free (modem_connect_tones_rx_state_t *s)
	Free an instance of the modem connect tones detector. More...

Function Documentation

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.

Parameters

s	The context.
amp	An array of signal samples.
len	The number of samples in the array.

Returns: The number of unprocessed samples.

References fsk_rx(), 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, MODEM_CONNECT_TONES_FAX_CED_OR_PREAMBLE, MODEM_CONNECT_TONES_FAX_CNG, MODEM_CONNECT_TONES_FAX_PREAMBLE, and MODEM_CONNECT_TONES_NONE.

Referenced by v8_rx().

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

s	The context.
len	The number of samples to fake.

Returns: The number of samples unprocessed.

int modem_connect_tones_rx_free ( modem_connect_tones_rx_state_t * s )

Free an instance of the modem connect tones detector.

Parameters

s	The context.

Returns: 0 for OK, else -1.

int modem_connect_tones_rx_get ( modem_connect_tones_rx_state_t * s )

Test if a modem_connect tone has been detected.

Parameters

s	The context.

Returns: The code for the detected tone.

References MODEM_CONNECT_TONES_NONE.

Referenced by v8_rx().

modem_connect_tones_rx_state_t* modem_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.

Parameters

s	The context.
tone_type	The type of connect tone being tested for.
tone_callback	An optional callback routine, used to report tones
user_data	An opaque pointer passed to the callback routine,

Returns: A pointer to the context.

References fsk_rx_init(), fsk_rx_signal_cutoff(), MODEM_CONNECT_TONES_ANS, MODEM_CONNECT_TONES_ANS_PR, MODEM_CONNECT_TONES_ANSAM, MODEM_CONNECT_TONES_ANSAM_PR, MODEM_CONNECT_TONES_FAX_CED_OR_PREAMBLE, MODEM_CONNECT_TONES_FAX_PREAMBLE, and MODEM_CONNECT_TONES_NONE.

int modem_connect_tones_rx_release ( modem_connect_tones_rx_state_t * s )

Release an instance of the modem connect tones detector.

Parameters

s	The context.

Returns: 0 for OK, else -1.

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

s	The context.
amp	An array of signal samples.
len	The number of samples to generate.

Returns: The number of samples generated.

References dds_mod(), 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().

int modem_connect_tones_tx_free ( modem_connect_tones_tx_state_t * s )

Free an instance of the modem connect tones generator.

Parameters

s	The context.

Returns: 0 for OK, else -1.

modem_connect_tones_tx_state_t* modem_connect_tones_tx_init	(	modem_connect_tones_tx_state_t *	s,
		int	tone_type
	)

Initialise an instance of the modem connect tones generator.

Parameters

s	The context.

References dds_phase_rate(), dds_scaling_dbm0(), 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.

int modem_connect_tones_tx_release ( modem_connect_tones_tx_state_t * s )

Release an instance of the modem connect tones generator.

Parameters

s	The context.

Returns: 0 for OK, else -1.

Macros

Functions

Function Documentation