57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
|
|
|
|
/*
|
|
QM DSP Library
|
|
|
|
Centre for Digital Music, Queen Mary, University of London.
|
|
This file 2005-2006 Christian Landone.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version. See the file
|
|
COPYING included with this distribution for more information.
|
|
*/
|
|
|
|
#include "Correlation.h"
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Construction/Destruction
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
Correlation::Correlation()
|
|
{
|
|
|
|
}
|
|
|
|
Correlation::~Correlation()
|
|
{
|
|
|
|
}
|
|
|
|
void Correlation::doAutoUnBiased(double *src, double *dst, unsigned int length)
|
|
{
|
|
double tmp = 0.0;
|
|
double outVal = 0.0;
|
|
|
|
unsigned int i,j;
|
|
|
|
for( i = 0; i < length; i++)
|
|
{
|
|
for( j = i; j < length; j++)
|
|
{
|
|
tmp += src[ j-i ] * src[ j ];
|
|
}
|
|
|
|
|
|
outVal = tmp / ( length - i );
|
|
|
|
if( outVal <= 0 )
|
|
dst[ i ] = EPS;
|
|
else
|
|
dst[ i ] = outVal;
|
|
|
|
tmp = 0.0;
|
|
}
|
|
}
|