/home/marsyas/marsyas/src/marsyas/Pitch2Chroma.h

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**
** 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.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef MARSYAS_PITCH2CHROMA_H
#define MARSYAS_PITCH2CHROMA_H

#include "MarSystem.h"

namespace Marsyas
{
    class Pitch2Chroma: public MarSystem
    {
        public:
            Pitch2Chroma(mrs_string inName);
            Pitch2Chroma(const Pitch2Chroma& inToCopy);

            ~Pitch2Chroma();

            MarSystem* clone() const;

            void addControls();
            void myUpdate(MarControlPtr inSender);
            void myProcess(realvec& inVec, realvec& outVec);

        private:
            // Pointer to MarControllers
            MarControlPtr ctrl_SampleRate_;
            MarControlPtr ctrl_LowestPitch_;
            MarControlPtr ctrl_NotesPerOctave_;
            MarControlPtr ctrl_NrOfNotes_;
            MarControlPtr ctrl_RefChromaIndex_;

            // Member variables
            mrs_real SampleRate_;                   // Sample rate of amplitude spectrum
            mrs_real LowestPitch_;                  // Lowest supported pitch
            mrs_natural NotesPerOctave_;            // Number of notes per octave
            mrs_natural NrOfNotes_;                 // Total number of notes
            mrs_natural RefChromaIndex_;            // Chroma index of LOWEST FREQUENCY
                                                    // Possible values: 1.. NotesPerOctave

            mrs_realvec PitchToNoteTransform_;      // Dimension: NrOfNotes x NrOfFFTBins
            mrs_realvec StartAndEndIndex_;          // Start/end indexes of notes in input vector

            mrs_realvec NoteToChromaTransform_;     // Dimension: NrOfNotesPerOctave x NrOfNotes

            void UpdatePitchToNoteTransform();
            void UpdateNoteToChromaTransform();
    };

}   // End namespace

#endif

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