Marsyas
0.6.0-alpha
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00001 /* 00002 ** Copyright (C) 1998-2008 George Tzanetakis <gtzan@cs.uvic.ca> 00003 ** 00004 ** This program is free software; you can redistribute it and/or modify 00005 ** it under the terms of the GNU General Public License as published by 00006 ** the Free Software Foundation; either version 2 of the License, or 00007 ** (at your option) any later version. 00008 ** 00009 ** This program is distributed in the hope that it will be useful, 00010 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 ** GNU General Public License for more details. 00013 ** 00014 ** You should have received a copy of the GNU General Public License 00015 ** along with this program; if not, write to the Free Software 00016 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 */ 00018 00019 #ifndef MARSYAS_WINDOWING_H 00020 #define MARSYAS_WINDOWING_H 00021 00022 #include <marsyas/system/MarSystem.h> 00023 00024 namespace Marsyas 00025 { 00043 class Windowing: public MarSystem 00044 { 00045 private: 00046 realvec envelope_; 00047 realvec tmp_; 00048 //mrs_real norm_; 00049 mrs_natural delta_; 00050 00051 mrs_natural zeroPadding_; 00052 mrs_natural size_; 00053 00054 MarControlPtr ctrl_type_; 00055 MarControlPtr ctrl_zeroPhasing_; 00056 MarControlPtr ctrl_zeroPadding_; 00057 MarControlPtr ctrl_size_; 00058 MarControlPtr ctrl_variance_; 00059 MarControlPtr ctrl_normalize_; 00060 00061 00062 void addcontrols(); 00063 void myUpdate(MarControlPtr sender); 00064 00065 public: 00066 Windowing(std::string name); 00067 Windowing(const Windowing& a); 00068 ~Windowing(); 00069 00070 MarSystem* clone() const; 00071 00072 void myProcess(realvec& in, realvec& out); 00073 00074 }; 00075 00077 void 00078 windowingFillRaisedCosine(realvec& envelope, mrs_real alpha, mrs_real beta); 00079 00088 inline 00089 void 00090 windowingFillHamming(realvec& envelope) 00091 { 00092 windowingFillRaisedCosine(envelope, 0.54, 0.46); 00093 } 00094 00103 inline 00104 void 00105 windowingFillHanning(realvec& envelope) 00106 { 00107 windowingFillRaisedCosine(envelope, 0.5, 0.5); 00108 } 00109 00111 void windowingFillTriangle(realvec& envelope); 00112 00114 void windowingFillBartlett(realvec& envelope); 00115 00117 void windowingFillGaussian(realvec& envelope, mrs_real sigma); 00118 00120 void windowingFillBlackman(realvec& envelope, mrs_real alpha=0.16); 00121 00123 void windowingFillBlackmanHarris(realvec& envelope); 00124 00126 void windowingFillCosine(realvec& envelope); 00127 00128 00129 }//namespace Marsyas 00130 00131 #endif