From 8adfb3bd99b4dcff2459756af090a640fd7a4b4a Mon Sep 17 00:00:00 2001
From: yo mama <pepper@scannerjammer.com>
Date: Fri, 19 Jun 2015 16:24:27 -0400
Subject: clone

---
 .../soundtouch/source/SoundTouch/PeakFinder.h      | 94 ++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 pysoundtouch/soundtouch/source/SoundTouch/PeakFinder.h

(limited to 'pysoundtouch/soundtouch/source/SoundTouch/PeakFinder.h')

diff --git a/pysoundtouch/soundtouch/source/SoundTouch/PeakFinder.h b/pysoundtouch/soundtouch/source/SoundTouch/PeakFinder.h
new file mode 100644
index 0000000..4b6f163
--- /dev/null
+++ b/pysoundtouch/soundtouch/source/SoundTouch/PeakFinder.h
@@ -0,0 +1,94 @@
+////////////////////////////////////////////////////////////////////////////////
+///
+/// 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: 2009-02-21 18:00:14 +0200 (Sat, 21 Feb 2009) $
+// File revision : $Revision: 4 $
+//
+// $Id: PeakFinder.h 63 2009-02-21 16:00:14Z 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 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, bool loose = 0) 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.
+		      bool loose = 0
+                     );
+};
+
+}
+
+#endif // _PeakFinder_H_
-- 
cgit v1.2.3-70-g09d2