g722.c File Reference

#include <inttypes.h>
#include <memory.h>
#include <stdlib.h>
#include "floating_fudge.h"
#include "spandsp/telephony.h"
#include "spandsp/saturated.h"
#include "spandsp/vector_int.h"
#include "spandsp/g722.h"

Functions
g722_decode_state_t *	g722_decode_init (g722_decode_state_t *s, int rate, int options)
int	g722_decode_release (g722_decode_state_t *s)
int	g722_decode (g722_decode_state_t *s, int16_t amp[], const uint8_t g722_data[], int len)
g722_encode_state_t *	g722_encode_init (g722_encode_state_t *s, int rate, int options)
int	g722_encode_release (g722_encode_state_t *s)
int	g722_encode (g722_encode_state_t *s, uint8_t g722_data[], const int16_t amp[], int len)

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Detailed Description

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Function Documentation

int g722_decode	(	g722_decode_state_t *	s,
		int16_t	amp[],
		const uint8_t	g722_data[],
		int	len
	)

Decode a buffer of G.722 data to linear PCM.

Parameters:

	s	The G.722 context.
	amp	The audio sample buffer.
	g722_data
	len

Returns:

The number of samples returned.

References vec_circular_dot_prodi16().

g722_decode_state_t* g722_decode_init	(	g722_decode_state_t *	s,
		int	rate,
		int	options
	)

Initialise an G.722 decode context.

Parameters:

	s	The G.722 decode context.
	rate	The bit rate of the G.722 data. The valid rates are 64000, 56000 and 48000.
	options

Returns:

A pointer to the G.722 decode context, or NULL for error.

int g722_encode	(	g722_encode_state_t *	s,
		uint8_t	g722_data[],
		const int16_t	amp[],
		int	len
	)

Encode a buffer of linear PCM data to G.722

Parameters:

	s	The G.722 context.
	g722_data	The G.722 data produced.
	amp	The audio sample buffer.
	len	The number of samples in the buffer.

Returns:

The number of bytes of G.722 data produced.

References vec_circular_dot_prodi16().

g722_encode_state_t* g722_encode_init	(	g722_encode_state_t *	s,
		int	rate,
		int	options
	)

Initialise an G.722 encode context.

Parameters:

	s	The G.722 encode context.
	rate	The required bit rate for the G.722 data. The valid rates are 64000, 56000 and 48000.
	options

Returns:

A pointer to the G.722 encode context, or NULL for error.