Utils Class Reference

helper functions More...

#include <utils.h>

Static Public Member Functions
static void	applyWindow (vector< double > &v)
	Apply hamming window to v.
static vector< double >	generateWindow (int s)
	Generate hamming window of size s.
static double	sinc (double x)
	sinc(x) = sin(pi * x) / (pi * x)
static void	normalize (vector< vector< double > > &v)
	Apply normalization factor, result is stored in v.
static void	normalize (vector< double > &v)
	Apply normalization factor, result is stored in v.
static void	gain (vector< vector< double > > &v, double g)
	Apply gain to vector, result is stored in v.
static void	convolve (vector< double > &v1, const vector< double > &v2)
	Convolve v1 and v2 using FFT. Result is stored in v1.
static int	nextPowerOfTwo (int n)
	Get the next power of 2 that is >= n.
static vector< complex< double > >	scaleComplex (const vector< complex< double > > &v, double k)
	Perform scalar multiplication on each complex value.
static vector< complex< double > >	addComplex (const vector< complex< double > > &u, const vector< complex< double > > &v)
	Perform element wise addition on complex numbers This method assumes u.size() == v.size()

Detailed Description

helper functions

Member Function Documentation

addComplex()

static vector< complex< double > > Utils::addComplex ( const vector< complex< double > > & u, const vector< complex< double > > & v )

static

Perform element wise addition on complex numbers This method assumes u.size() == v.size()

Parameters

u	-> complex vector
v	-> complex vector

applyWindow()

static void Utils::applyWindow ( vector< double > & v )

static

Apply hamming window to v.

Parameters

v

-> vector

convolve()

static void Utils::convolve ( vector< double > & v1, const vector< double > & v2 )

static

Convolve v1 and v2 using FFT. Result is stored in v1.

Parameters

v1	-> vector one
v2	-> vector two

gain()

static void Utils::gain ( vector< vector< double > > & v, double g )

static

Apply gain to vector, result is stored in v.

Parameters

v	-> vector
g	-> gain

generateWindow()

static vector< double > Utils::generateWindow ( int s )

static

Generate hamming window of size s.

Parameters

s	-> length of window

nextPowerOfTwo()

static int Utils::nextPowerOfTwo ( int n )

static

Get the next power of 2 that is >= n.

Parameters

n

-> number

normalize() [1/2]

static void Utils::normalize ( vector< double > & v )

static

Apply normalization factor, result is stored in v.

Parameters

v

-> vector

normalize() [2/2]

static void Utils::normalize ( vector< vector< double > > & v )

static

Apply normalization factor, result is stored in v.

Parameters

v

-> vector

scaleComplex()

static vector< complex< double > > Utils::scaleComplex ( const vector< complex< double > > & v, double k )

static

Perform scalar multiplication on each complex value.

Parameters

v	-> vector of complex numbers
k	-> scalar

sinc()

static double Utils::sinc ( double x )

static

sinc(x) = sin(pi * x) / (pi * x)

Parameters

x

-> x

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The documentation for this class was generated from the following file:

• include/utils.h