104 lines
1.9 KiB
C++
104 lines
1.9 KiB
C++
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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QM DSP Library
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Centre for Digital Music, Queen Mary, University of London.
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This file copyright 2006 Martin Gasser.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "TonalEstimator.h"
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#include <cmath>
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#include <iostream>
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#ifndef PI
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#define PI (3.14159265358979232846)
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#endif
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TonalEstimator::TonalEstimator()
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{
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m_Basis.resize(6);
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int i = 0;
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// circle of fifths
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = std::sin( (7.0 / 6.0) * iP * PI);
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}
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i++;
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = std::cos( (7.0 / 6.0) * iP * PI);
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}
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i++;
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// circle of major thirds
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = 0.6 * std::sin( (2.0 / 3.0) * iP * PI);
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}
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i++;
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = 0.6 * std::cos( (2.0 / 3.0) * iP * PI);
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}
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i++;
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// circle of minor thirds
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = 1.1 * std::sin( (3.0 / 2.0) * iP * PI);
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}
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i++;
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m_Basis[i].resize(12);
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for (int iP = 0; iP < 12; iP++)
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{
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m_Basis[i][iP] = 1.1 * std::cos( (3.0 / 2.0) * iP * PI);
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}
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}
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TonalEstimator::~TonalEstimator()
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{
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}
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TCSVector TonalEstimator::transform2TCS(const ChromaVector& rVector)
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{
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TCSVector vaRetVal;
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vaRetVal.resize(6, 0.0);
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for (int i = 0; i < 6; i++)
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{
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for (int iP = 0; iP < 12; iP++)
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{
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vaRetVal[i] += m_Basis[i][iP] * rVector[iP];
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}
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}
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return vaRetVal;
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}
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