1 files changed, 84 insertions, 0 deletions
diff --git a/libs/qm-dsp/dsp/chromagram/ConstantQ.h b/libs/qm-dsp/dsp/chromagram/ConstantQ.h
new file mode 100644
index 0000000000..c06f60a9d0
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+++ b/libs/qm-dsp/dsp/chromagram/ConstantQ.h
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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 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 CONSTANTQ_H
+#define CONSTANTQ_H
+
+#include <vector>
+#include "maths/MathAliases.h"
+#include "maths/MathUtilities.h"
+
+struct CQConfig{
+    unsigned int FS;   // samplerate
+    double min;        // minimum frequency
+    double max;        // maximum frequency
+    unsigned int BPO;  // bins per octave
+    double CQThresh;   // threshold
+};
+
+class ConstantQ {
+	
+//public functions incl. sparsekernel so can keep out of loop in main
+public:
+    void process( const double* FFTRe, const double* FFTIm,
+                  double* CQRe, double* CQIm );
+
+    ConstantQ( CQConfig Config );
+    ~ConstantQ();
+
+    double* process( const double* FFTData );
+
+    void sparsekernel();
+
+    double hamming(int len, int n) {
+	double out = 0.54 - 0.46*cos(2*PI*n/len);
+	return(out);
+    }
+	
+    int getnumwin() { return m_numWin;}
+    double getQ() { return m_dQ;}
+    int getK() {return m_uK ;}
+    int getfftlength() { return m_FFTLength;}
+    int gethop() { return m_hop;}
+
+private:
+    void initialise( CQConfig Config );
+    void deInitialise();
+	
+    double* m_CQdata;
+    unsigned int m_FS;
+    double m_FMin;
+    double m_FMax;
+    double m_dQ;
+    double m_CQThresh;
+    unsigned int m_numWin;
+    unsigned int m_hop;
+    unsigned int m_BPO;
+    unsigned int m_FFTLength;
+    unsigned int m_uK;
+
+    struct SparseKernel {
+        std::vector<unsigned> is;
+        std::vector<unsigned> js;
+        std::vector<double> imag;
+        std::vector<double> real;
+    };
+
+    SparseKernel *m_sparseKernel;
+};
+
+
+#endif//CONSTANTQ_H
+