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diff --git a/lib/soundtouch-1.8.0/PeakFinder.h b/lib/soundtouch-1.8.0/PeakFinder.h
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+////////////////////////////////////////////////////////////////////////////////
+///
+/// The routine detects highest value on an array of values and calculates the 
+/// precise peak location as a mass-center of the 'hump' around the peak value.
+///
+/// Author        : Copyright (c) Olli Parviainen
+/// Author e-mail : oparviai 'at' iki.fi
+/// SoundTouch WWW: http://www.surina.net/soundtouch
+///
+////////////////////////////////////////////////////////////////////////////////
+//
+// Last changed  : $Date: 2011-12-30 15:33:46 -0500 (Fri, 30 Dec 2011) $
+// File revision : $Revision: 4 $
+//
+// $Id: PeakFinder.h 132 2011-12-30 20:33:46Z oparviai $
+//
+////////////////////////////////////////////////////////////////////////////////
+//
+// License :
+//
+//  SoundTouch audio processing library
+//  Copyright (c) Olli Parviainen
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library 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
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef _PeakFinder_H_
+#define _PeakFinder_H_
+
+namespace soundtouch
+{
+
+class PeakFinder
+{
+protected:
+    /// Min, max allowed peak positions within the data vector
+    int minPos, maxPos;
+
+    /// Calculates the mass center between given vector items.
+    double calcMassCenter(const float *data, ///< Data vector.
+                         int firstPos,      ///< Index of first vector item beloging to the peak.
+                         int lastPos        ///< Index of last vector item beloging to the peak.
+                         ) const;
+
+    /// Finds the data vector index where the monotoniously decreasing signal crosses the
+    /// given level.
+    int   findCrossingLevel(const float *data,  ///< Data vector.
+                            float level,        ///< Goal crossing level.
+                            int peakpos,        ///< Peak position index within the data vector.
+                            int direction       /// Direction where to proceed from the peak: 1 = right, -1 = left.
+                            ) const;
+
+    // Finds real 'top' of a peak hump from neighnourhood of the given 'peakpos'.
+    int findTop(const float *data, int peakpos) const;
+
+
+    /// Finds the 'ground' level, i.e. smallest level between two neighbouring peaks, to right- 
+    /// or left-hand side of the given peak position.
+    int   findGround(const float *data,     /// Data vector.
+                     int peakpos,           /// Peak position index within the data vector.
+                     int direction          /// Direction where to proceed from the peak: 1 = right, -1 = left.
+                     ) const;
+
+    /// get exact center of peak near given position by calculating local mass of center
+    double getPeakCenter(const float *data, int peakpos) const;
+
+public:
+    /// Constructor. 
+    PeakFinder();
+
+    /// Detect exact peak position of the data vector by finding the largest peak 'hump'
+    /// and calculating the mass-center location of the peak hump.
+    ///
+    /// \return The location of the largest base harmonic peak hump.
+    double detectPeak(const float *data, /// Data vector to be analyzed. The data vector has
+                                        /// to be at least 'maxPos' items long.
+                     int minPos,        ///< Min allowed peak location within the vector data.
+                     int maxPos         ///< Max allowed peak location within the vector data.
+                     );
+};
+
+}
+
+#endif // _PeakFinder_H_