silence_gen.c File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#include "spandsp/telephony.h"
#include "spandsp/logging.h"
#include "spandsp/silence_gen.h"

Functions
int	silence_gen (silence_gen_state_t *s, int16_t *amp, int max_len)
	Generate a block of silent audio samples.
void	silence_gen_always (silence_gen_state_t *s)
	Set a silence generator context to output continuous silence.
void	silence_gen_set (silence_gen_state_t *s, int silent_samples)
	Set a silence generator context to output a specified period of silence.
void	silence_gen_alter (silence_gen_state_t *s, int silent_samples)
	Alter the period of a silence generator context by a specified amount.
int	silence_gen_remainder (silence_gen_state_t *s)
	Find how long a silence generator context has to run.
int	silence_gen_generated (silence_gen_state_t *s)
	Find the total silence generated to date.
silence_gen_state_t *	silence_gen_init (silence_gen_state_t *s, int silent_samples)
	Initialise a timed silence generator context.

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Detailed Description

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Function Documentation

int silence_gen (  silence_gen_state_t *  s, int16_t *  amp, int  max_len )

Generate a block of silent audio samples. Generate a block of silent audio samples. Parameters: s  The silence generator context. amp  The audio sample buffer. max_len  The number of samples to be generated. Returns: The number of samples actually generated. This will be zero when there is nothing to send.

void silence_gen_alter (  silence_gen_state_t *  s, int  silent_samples )

Alter the period of a silence generator context by a specified amount. Alter the period of a silence generator context by a specified amount. Parameters: s  The silence generator context. silent_samples  The number of samples to change the setting by. A positive number increases the duration. A negative number reduces it. The duration is prevented from going negative.

void silence_gen_always (  silence_gen_state_t *  s  )

Set a silence generator context to output continuous silence. Set a silence generator context to output continuous silence. Parameters: s  The silence generator context.

int silence_gen_generated (  silence_gen_state_t *  s  )

Find the total silence generated to date. Find the total silence generated to date by a silence generator context. Parameters: s  The silence generator context. Returns: The number of samples generated.

silence_gen_state_t* silence_gen_init (  silence_gen_state_t *  s, int  silent_samples )

Initialise a timed silence generator context. Initialise a timed silence generator context. Parameters: s  The silence generator context. the  initial number of samples to set the silence to. Returns: A pointer to the silence generator context.

int silence_gen_remainder (  silence_gen_state_t *  s  )

Find how long a silence generator context has to run. Find how long a silence generator context has to run. Parameters: s  The silence generator context. Returns: The number of samples remaining.

void silence_gen_set (  silence_gen_state_t *  s, int  silent_samples )

Set a silence generator context to output a specified period of silence. Set a silence generator context to output a specified period of silence. Parameters: s  The silence generator context. silent_samples  The number of samples to be generated.

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