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diff --git a/src/base/MathHelper.h b/src/base/MathHelper.h
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+++ b/src/base/MathHelper.h
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+//
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  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 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
+//
+//  Current versions can be found at www.libavg.de
+//
+
+#ifndef _MathHelper_H_
+#define _MathHelper_H_
+
+#include "../api.h"
+#include <vector>
+#include <set>
+
+#include <math.h>
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+namespace avg {
+
+static const float PI = 3.14159265358979323846f;
+static const float EPSILON = 0.00001f;
+
+bool ispow2(int n);
+
+int nextpow2(int n);
+
+int safeCeil(float d);
+
+bool almostEqual(float d1, float d2, float epsilon=EPSILON);
+
+float invSqrt(float x);
+
+template<class T>
+T sqr(T d)
+{
+    return d*d;
+}
+
+template<class T>
+int sgn(T val)
+{
+    return int(val/fabs(val));
+}
+
+template<class T>
+std::vector<T> vectorFromCArray(int n, T* pData)
+{
+    std::vector<T> v;
+    for (int i=0; i<n; ++i) {
+        v.push_back(*(pData+i));
+    }
+    return v;
+}
+
+template<class T>
+std::vector<std::vector<T> > vector2DFromCArray(int n, int m, T* pData)
+{
+    std::vector<std::vector<T> > v(4, std::vector<T>());
+    for (int i=0; i<n; ++i) {
+        for (int j=0; j<m; ++j) {
+            v[i].push_back(*(pData+j+i*m));
+        }
+    }
+    return v;
+}
+
+#ifndef round
+template<class T>
+T round(T d)
+{
+    return floor(d + 0.5f);
+}
+#endif
+
+}
+#endif
+