70 lines
2.4 KiB
C++
70 lines
2.4 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.
|
|
*/
|
|
|
|
#ifndef MATHUTILITIES_H
|
|
#define MATHUTILITIES_H
|
|
|
|
#include <vector>
|
|
|
|
#include "nan-inf.h"
|
|
|
|
class MathUtilities
|
|
{
|
|
public:
|
|
static double round( double x );
|
|
|
|
static void getFrameMinMax( const double* data, unsigned int len, double* min, double* max );
|
|
|
|
static double mean( const double* src, unsigned int len );
|
|
static double mean( const std::vector<double> &data,
|
|
unsigned int start, unsigned int count );
|
|
static double sum( const double* src, unsigned int len );
|
|
static double median( const double* src, unsigned int len );
|
|
|
|
static double princarg( double ang );
|
|
static double mod( double x, double y);
|
|
|
|
static void getAlphaNorm(const double *data, unsigned int len, unsigned int alpha, double* ANorm);
|
|
static double getAlphaNorm(const std::vector <double> &data, unsigned int alpha );
|
|
|
|
static void circShift( double* data, int length, int shift);
|
|
|
|
static int getMax( double* data, unsigned int length, double* max = 0 );
|
|
static int getMax( const std::vector<double> &data, double* max = 0 );
|
|
static int compareInt(const void * a, const void * b);
|
|
|
|
enum NormaliseType {
|
|
NormaliseNone,
|
|
NormaliseUnitSum,
|
|
NormaliseUnitMax
|
|
};
|
|
|
|
static void normalise(double *data, int length,
|
|
NormaliseType n = NormaliseUnitMax);
|
|
|
|
static void normalise(std::vector<double> &data,
|
|
NormaliseType n = NormaliseUnitMax);
|
|
|
|
// moving mean threshholding:
|
|
static void adaptiveThreshold(std::vector<double> &data);
|
|
|
|
static bool isPowerOfTwo(int x);
|
|
static int nextPowerOfTwo(int x); // e.g. 1300 -> 2048, 2048 -> 2048
|
|
static int previousPowerOfTwo(int x); // e.g. 1300 -> 1024, 2048 -> 2048
|
|
static int nearestPowerOfTwo(int x); // e.g. 1300 -> 1024, 1700 -> 2048
|
|
};
|
|
|
|
#endif
|