plc.c File Reference

#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "spandsp/telephony.h"
#include "spandsp/dc_restore.h"
#include "spandsp/plc.h"

Defines
#define	ATTENUATION_INCREMENT   0.0025f
#define	ms_to_samples(t)   (((t)*SAMPLE_RATE)/1000)
Functions
int	plc_rx (plc_state_t *s, int16_t amp[], int len)
	Process a block of received audio samples for PLC.
int	plc_fillin (plc_state_t *s, int16_t amp[], int len)
	Fill-in a block of missing audio samples.
plc_state_t *	plc_init (plc_state_t *s)
	Initialise a PLC context.
int	plc_release (plc_state_t *s)

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Detailed Description

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Function Documentation

int plc_fillin (  plc_state_t *  s, int16_t  amp[], int  len )

Fill-in a block of missing audio samples. Fill-in a block of missing audio samples. Parameters: s  The packet loss concealer context. amp  The audio sample buffer. len  The number of samples to be synthesised. Returns: The number of samples synthesized.

plc_state_t* plc_init (  plc_state_t *  s  )

Initialise a PLC context. Initialise a packet loss concealer context. Parameters: s  The packet loss concealer context. Returns: A pointer to the the packet loss concealer context.

int plc_release (  plc_state_t *  s  )

Free a packet loss concealer context. Parameters: s  The packet loss concealer context. Returns: 0 for OK.

int plc_rx (  plc_state_t *  s, int16_t  amp[], int  len )

Process a block of received audio samples for PLC. Process a block of received audio samples for PLC. Parameters: s  The packet loss concealer context. amp  The audio sample buffer. len  The number of samples in the buffer. Returns: The number of samples in the buffer.

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