vector_int.c File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "floating_fudge.h"
#include <assert.h>
#include "spandsp/telephony.h"
#include "spandsp/vector_int.h"

Functions
int32_t	vec_dot_prodi16 (const int16_t x[], const int16_t y[], int n)
	Find the dot product of two int16_t vectors.
int32_t	vec_circular_dot_prodi16 (const int16_t x[], const int16_t y[], int n, int pos)
	Find the dot product of two int16_t vectors, where the first is a circular buffer with an offset for the starting position.
void	vec_lmsi16 (const int16_t x[], int16_t y[], int n, int16_t error)
void	vec_circular_lmsi16 (const int16_t x[], int16_t y[], int n, int pos, int16_t error)
int32_t	vec_min_maxi16 (const int16_t x[], int n, int16_t out[])
	Find the minimum and maximum values in an int16_t vector.

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Detailed Description

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Function Documentation

int32_t vec_circular_dot_prodi16	(	const int16_t	x[],
		const int16_t	y[],
		int	n,
		int	pos
	)

Find the dot product of two int16_t vectors, where the first is a circular buffer with an offset for the starting position.

Parameters:

	x	The first vector.
	y	The first vector.
	n	The number of elements in the vectors.
	pos	The starting position in the x vector.

Returns:

The dot product of the two vectors.

References vec_dot_prodi16().

Referenced by g722_decode(), g722_encode(), v17_rx(), v27ter_rx(), and v29_rx().

int32_t vec_dot_prodi16	(	const int16_t	x[],
		const int16_t	y[],
		int	n
	)

Find the dot product of two int16_t vectors.

Parameters:

	x	The first vector.
	y	The first vector.
	n	The number of elements in the vectors.

Returns:

The dot product of the two vectors.

Referenced by vec_circular_dot_prodi16().

int32_t vec_min_maxi16	(	const int16_t	x[],
		int	n,
		int16_t	out[]
	)

Find the minimum and maximum values in an int16_t vector.

Parameters:

	x	The vector to be searched.
	n	The number of elements in the vector.
	out	A two element vector. The first will receive the maximum. The second will receive the minimum. This parameter may be set to NULL.

Returns:

The absolute maximum value. Since the range of negative numbers exceeds the range of positive one, the returned integer is longer than the ones being searched.