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/* -*- 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 copyright 2008 Kurt Jacobson and QMUL.
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 "BeatSpectrum.h"
#include "maths/CosineDistance.h"
using std::vector;
vector<double> BeatSpectrum::process(const vector<vector<double> > &m)
{
int origin = 0;
int sz = m.size()/2;
int i, j, k;
vector<double> v(sz);
for (i = 0; i < sz; ++i) v[i] = 0.0;
CosineDistance cd;
for (i = origin; i < origin + sz; ++i) {
k = 0;
for (j = i + 1; j < i + sz + 1; ++j) {
v[k++] += cd.distance(m[i], m[j]);
}
}
// normalize
double max = 0.0;
for (i = 0; i < sz; ++i) {
if (v[i] > max) max = v[i];
}
if (max > 0.0) {
for (i = 0; i < sz; ++i) {
v[i] /= max;
}
}
return v;
}
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