/usr/include/qm-dsp/dsp/onsets/PeakPicking.h is in libqm-dsp-dev 1.7.1-4.
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/*
QM DSP Library
Centre for Digital Music, Queen Mary, University of London.
This file 2005-2006 Christian Landone.
Modifications:
- delta threshold
Description: add delta threshold used as offset in the smoothed
detection function
Author: Mathieu Barthet
Date: June 2010
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.
*/
// PeakPicking.h: interface for the PeakPicking class.
//
//////////////////////////////////////////////////////////////////////
#ifndef PEAKPICKING_H
#define PEAKPICKING_H
#include "maths/MathUtilities.h"
#include "maths/MathAliases.h"
#include "dsp/signalconditioning/DFProcess.h"
struct PPWinThresh
{
unsigned int pre;
unsigned int post;
PPWinThresh(unsigned int x, unsigned int y) :
pre(x),
post(y)
{
}
};
struct QFitThresh
{
double a;
double b;
double c;
QFitThresh(double x, double y, double z) :
a(x),
b(y),
c(z)
{
}
};
struct PPickParams
{
unsigned int length; //Detection FunctionLength
double tau; // time resolution of the detection function
unsigned int alpha; //alpha-norm parameter
double cutoff;//low-pass Filter cutoff freq
unsigned int LPOrd; // low-pass Filter order
double* LPACoeffs; //low pass Filter den coefficients
double* LPBCoeffs; //low pass Filter num coefficients
PPWinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
QFitThresh QuadThresh;
float delta; //delta threshold used as an offset when computing the smoothed detection function
PPickParams() :
length(0),
tau(0),
alpha(0),
cutoff(0),
LPOrd(0),
LPACoeffs(NULL),
LPBCoeffs(NULL),
WinT(0,0),
QuadThresh(0,0,0),
delta(0)
{
}
};
class PeakPicking
{
public:
PeakPicking( PPickParams Config );
virtual ~PeakPicking();
void process( double* src, unsigned int len, vector<int> &onsets );
private:
void initialise( PPickParams Config );
void deInitialise();
int quadEval( vector<double> &src, vector<int> &idx );
DFProcConfig m_DFProcessingParams;
unsigned int m_DFLength ;
double Qfilta ;
double Qfiltb;
double Qfiltc;
double* m_workBuffer;
DFProcess* m_DFSmoothing;
};
#endif
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