diff dsp/tonal/TonalEstimator.cpp @ 225:49844bc8a895

* Queen Mary C++ DSP library

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dsp/tonal/TonalEstimator.cpp	Wed Apr 05 17:35:59 2006 +0000
@@ -0,0 +1,98 @@
+/* -*- 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 2006 Martin Gasser.
+    All rights reserved.
+*/
+
+#include "TonalEstimator.h"
+
+#include <cmath>
+#include <iostream>
+
+#ifndef PI
+#define PI (3.14159265358979232846)
+#endif
+
+TonalEstimator::TonalEstimator()
+{
+	m_Basis.resize(6);
+
+	int i = 0;
+	
+	
+	// circle of fifths
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = std::sin( (7.0 / 6.0) * iP * PI);
+	}
+	
+	i++;
+
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = std::cos( (7.0 / 6.0) * iP * PI);
+	}
+	
+	i++;
+	
+	
+	// circle of major thirds
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = 0.6 * std::sin( (2.0 / 3.0) * iP * PI);
+	}
+	
+	i++;
+
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = 0.6 * std::cos( (2.0 / 3.0) * iP * PI);
+	}
+
+	i++;
+
+
+	// circle of minor thirds
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = 1.1 * std::sin( (3.0 / 2.0) * iP * PI);
+	}
+	
+	i++;
+
+	m_Basis[i].resize(12);
+	for (int iP = 0; iP < 12; iP++)
+	{
+		m_Basis[i][iP] = 1.1 * std::cos( (3.0 / 2.0) * iP * PI);
+	}
+
+}
+
+TonalEstimator::~TonalEstimator()
+{
+}
+
+TCSVector TonalEstimator::transform2TCS(const ChromaVector& rVector)
+{
+	TCSVector vaRetVal;
+	vaRetVal.resize(6, 0.0);
+		
+	for (int i = 0; i < 6; i++)
+	{
+		for (int iP = 0; iP < 12; iP++)
+		{
+			vaRetVal[i] += m_Basis[i][iP] * rVector[iP];
+		}
+	}
+	
+	return vaRetVal;
+}