modem_echo.c File Reference

#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include "spandsp/telephony.h"
#include "spandsp/bit_operations.h"
#include "spandsp/dc_restore.h"
#include "spandsp/modem_echo.h"

Functions
modem_echo_can_state_t *	modem_echo_can_create (int len)
void	modem_echo_can_free (modem_echo_can_state_t *ec)
void	modem_echo_can_flush (modem_echo_can_state_t *ec)
void	modem_echo_can_adaption_mode (modem_echo_can_state_t *ec, int adapt)
int16_t	modem_echo_can_update (modem_echo_can_state_t *ec, int16_t tx, int16_t rx)

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Detailed Description

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Function Documentation

void modem_echo_can_adaption_mode (  modem_echo_can_state_t *  ec, int  adapt )

Set the adaption mode of a modem echo canceller context. Parameters: ec  The echo canceller context. adapt  The mode.

modem_echo_can_state_t* modem_echo_can_create (  int  len  )

Create a modem echo canceller context. Parameters: len  The length of the canceller, in samples. eturn The new canceller context, or NULL if the canceller could not be created.

void modem_echo_can_flush (  modem_echo_can_state_t *  ec  )

Flush (reinitialise) a modem echo canceller context. Parameters: ec  The echo canceller context.

void modem_echo_can_free (  modem_echo_can_state_t *  ec  )

Free a modem echo canceller context. Parameters: ec  The echo canceller context.

int16_t modem_echo_can_update (  modem_echo_can_state_t *  ec, int16_t  tx, int16_t  rx )

Process a sample through a modem echo canceller. Parameters: ec  The echo canceller context. tx  The transmitted audio sample. rx  The received audio sample. eturn The clean (echo cancelled) received sample.

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