c@0: //
c@0: //  WindowFunction.cpp
c@0: //  Tempogram
c@0: //
c@0: //  Created by Carl Bussey on 26/06/2014.
c@0: //  Copyright (c) 2014 Carl Bussey. All rights reserved.
c@0: //
c@0: 
c@0: #include "WindowFunction.h"
c@0: using std::vector;
c@0: 
c@9: //static function
c@0: void
c@0: WindowFunction::hanning(float *signal, const unsigned int N, const bool normalise){
c@0:     
c@0:     float sum = 0;
c@0:     for(int i = 0; i < N; i++){
c@9:         sum += signal[i] = 0.5*(1-cos((float)2*M_PI*i/N));
c@0:     }
c@0:     if (normalise){
c@0:         for(int i = 0; i < N; i++){
c@0:             signal[i] /= sum;
c@0:         }
c@0:     }
c@0: }