Include vamp-pyin

In preparation for captainMorgan's pitch analysis script.

libs/vamp-pyin/MonoNote.h

@@ -0,0 +1,46 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    pYIN - A fundamental frequency estimator for monophonic audio
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    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 _MONONOTE_H_
+#define _MONONOTE_H_
+
+#include "MonoNoteHMM.h"
+#include "MonoNoteParameters.h"
+
+#include <iostream>
+#include <vector>
+#include <exception>
+
+using std::vector;
+using std::pair;
+
+class MonoNote {
+public:
+    MonoNote();
+    virtual ~MonoNote();
+    
+    struct FrameOutput {
+        size_t frameNumber;
+        double pitch;
+        size_t noteState; // unvoiced, attack, stable, release, inter
+        FrameOutput() :  frameNumber(0), pitch(-1.0), noteState(0) { }
+        FrameOutput(size_t _frameNumber, double _pitch, size_t _noteState) :
+            frameNumber(_frameNumber), pitch(_pitch), noteState(_noteState) { }
+    };
+    // pitchProb is a frame-wise vector carrying a vector of pitch-probability pairs
+    const vector<FrameOutput> process(const vector<vector<pair<double, double> > > pitchProb);
+private:
+    MonoNoteHMM hmm;
+};
+
+#endif