add (copy of 2.0-ongoing) rubberband to 3.0

git-svn-id: svn://localhost/ardour2/branches/3.0@3713 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/rubberband/src/AudioCurve.h

@@ -0,0 +1,45 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rubber Band
+    An audio time-stretching and pitch-shifting library.
+    Copyright 2007-2008 Chris Cannam.
+    
+    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 _AUDIO_CURVE_H_
+#define _AUDIO_CURVE_H_
+
+#include <sys/types.h>
+
+#include "sysutils.h"
+
+namespace RubberBand 
+{
+
+class AudioCurve
+{
+public:
+    AudioCurve(size_t sampleRate, size_t windowSize);
+    virtual ~AudioCurve();
+
+    virtual void setWindowSize(size_t newSize) = 0;
+    
+    virtual float process(const float *R__ mag, size_t increment) = 0;
+    virtual float process(const double *R__ mag, size_t increment);
+    virtual void reset() = 0;
+
+protected:
+    size_t m_sampleRate;
+    size_t m_windowSize;
+};
+
+}
+
+#endif
+