oslec.h File Reference

Go to the source code of this file.

Macros
#define	ECHO_CAN_USE_ADAPTION   0x01
#define	ECHO_CAN_USE_NLP   0x02
#define	ECHO_CAN_USE_CNG   0x04
#define	ECHO_CAN_USE_CLIP   0x08
#define	ECHO_CAN_USE_TX_HPF   0x10
#define	ECHO_CAN_USE_RX_HPF   0x20
#define	ECHO_CAN_DISABLE   0x40

Functions
struct oslec_state *	oslec_create (int len, int adaption_mode)
void	oslec_free (struct oslec_state *ec)
void	oslec_flush (struct oslec_state *ec)
void	oslec_adaption_mode (struct oslec_state *ec, int adaption_mode)
void	oslec_snapshot (struct oslec_state *ec)
int16_t	oslec_update (struct oslec_state *ec, int16_t tx, int16_t rx)
int16_t	oslec_hpf_tx (struct oslec_state *ec, int16_t tx)

Macro Definition Documentation

#define ECHO_CAN_DISABLE   0x40

Definition at line 37 of file oslec.h.

#define ECHO_CAN_USE_ADAPTION   0x01

Definition at line 31 of file oslec.h.

#define ECHO_CAN_USE_CLIP   0x08

Definition at line 34 of file oslec.h.

#define ECHO_CAN_USE_CNG   0x04

Definition at line 33 of file oslec.h.

#define ECHO_CAN_USE_NLP   0x02

Definition at line 32 of file oslec.h.

#define ECHO_CAN_USE_RX_HPF   0x20

Definition at line 36 of file oslec.h.

#define ECHO_CAN_USE_TX_HPF   0x10

Definition at line 35 of file oslec.h.

Function Documentation

void oslec_adaption_mode	(	struct oslec_state *	ec,
		int	adaption_mode
	)

oslec_adaption_mode - set the adaption mode of a voice echo canceller context. The echo canceller context. : The mode.

Definition at line 295 of file echo.c.

struct oslec_state* oslec_create ( int  len, int  adaption_mode  )

read

oslec_create - Create a voice echo canceller context. : The length of the canceller, in samples.

Returns

: The new canceller context, or NULL if the canceller could not be created.

Definition at line 229 of file echo.c.

void oslec_flush

(

struct oslec_state *

ec

)

oslec_flush - Flush (reinitialise) a voice echo canceller context. : The echo canceller context.

Definition at line 301 of file echo.c.

void oslec_free

(

struct oslec_state *

ec

)

oslec_free - Free a voice echo canceller context. : The echo canceller context.

Definition at line 282 of file echo.c.

int16_t oslec_hpf_tx	(	struct oslec_state *	ec,
		int16_t	tx
	)

oslec_hpf_tx: Process to high pass filter the tx signal. : The echo canceller context. : The transmitted auio sample.

The return value is the HP filtered transmit sample, send this to your D/A.

Definition at line 627 of file echo.c.

void oslec_snapshot

(

struct oslec_state *

ec

)

Definition at line 327 of file echo.c.

int16_t oslec_update	(	struct oslec_state *	ec,
		int16_t	tx,
		int16_t	rx
	)

oslec_update: Process a sample through a voice echo canceller. : The echo canceller context. : The transmitted audio sample. : The received audio sample.

The return value is the clean (echo cancelled) received sample.

Definition at line 335 of file echo.c.