time_scale.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <limits.h>
#include "spandsp/telephony.h"
#include "spandsp/time_scale.h"

Functions
int	time_scale_rate (time_scale_t *s, float rate)
	Change the time scale rate.
int	time_scale_init (time_scale_t *s, float rate)
	Initialise a time scale context.
int	time_scale (time_scale_t *s, int16_t out[], int16_t in[], int len)
	Time scale a chunk of audio samples.

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Detailed Description

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Function Documentation

int time_scale	(	time_scale_t *	s,
		int16_t	out[],
		int16_t	in[],
		int	len
	)

Time scale a chunk of audio samples.

Time scale a chunk of audio samples.

Parameters:

	s	The time sclae context.
	out	The output audio sample buffer.
	in	The input audio sample buffer.
	len	The number of input samples.

Returns:

The number of output samples.

int time_scale_init	(	time_scale_t *	s,
		float	rate
	)

Initialise a time scale context.

Initialise a time scale context. This must be called before the first use of the context, to initialise its contents.

Parameters:

	s	The time scale context.
	rate	The ratio between the output speed and the input speed.

Returns:

0 if initialised OK, else -1.

int time_scale_rate	(	time_scale_t *	s,
		float	rate
	)

Change the time scale rate.

Change the time scale rate.

Parameters:

	s	The time scale context.
	rate	The ratio between the output speed and the input speed.

Returns:

0 if changed OK, else -1.

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