modem_connect_tones.h File Reference

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Classes
struct	modem_connect_tones_tx_state_t
struct	modem_connect_tones_rx_state_t
Enumerations
enum	{ MODEM_CONNECT_TONES_FAX_CNG, MODEM_CONNECT_TONES_FAX_CED, MODEM_CONNECT_TONES_EC_DISABLE, MODEM_CONNECT_TONES_EC_DISABLE_MOD }
Functions
modem_connect_tones_tx_state_t *	modem_connect_tones_tx_init (modem_connect_tones_tx_state_t *s, int tone_type)
	Initialse an instance of the echo canceller disable tone generator.
int	modem_connect_tones_tx (modem_connect_tones_tx_state_t *s, int16_t amp[], int len)
	Generate a block of echo canceller disable tone samples.
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_get (modem_connect_tones_rx_state_t *s)
	Test if a modem_connect tone has been detected.
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.

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Detailed Description

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Enumeration Type Documentation

anonymous enum

Enumerator:

MODEM_CONNECT_TONES_EC_DISABLE_MOD

The version of EC disable with some 15Hz AM content, as in V.8.

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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.

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:

TRUE if tone is detected, else FALSE.

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.

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

Generate a block of echo canceller disable tone samples.

Parameters:

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

Returns:

The number of samples generated.

modem_connect_tones_tx_state_t* modem_connect_tones_tx_init	(	modem_connect_tones_tx_state_t *	s,
		int	tone_type
	)

Initialse an instance of the echo canceller disable tone generator.

Parameters:

s

The context.

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