Mercurial > hg > vamp-tempogram
view WindowFunction.cpp @ 45:e6a43500629b
I think that the tempogram max lag can't exceed the window length - 1, rather than the window length, because it is used as an index into a vector of the window length
author | Chris Cannam |
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date | Thu, 25 Sep 2014 18:42:35 +0100 |
parents | 4cf2d163127b |
children |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Vamp Tempogram Plugin Carl Bussey, Centre for Digital Music, Queen Mary University of London Copyright 2014 Queen Mary University of London. 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. */ #include "WindowFunction.h" using std::vector; //static function void WindowFunction::hanning(float * window, const unsigned int &N, const bool &normalise){ float sum = 0; for(int i = 0; i < (int)N; i++){ window[i] = 0.5*(1-cos((float)2*M_PI*i/N)); sum += window[i]; } if (normalise){ for(int i = 0; i < (int)N; i++){ window[i] /= sum; } } }