Marsyas
0.6.0-alpha
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00001 /* 00002 ** Copyright (C) 1998-2006 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_SELECTOR_H 00020 #define MARSYAS_SELECTOR_H 00021 00022 #include <marsyas/system/MarSystem.h> 00023 #include <algorithm> 00024 00025 namespace Marsyas 00026 { 00055 class marsyas_EXPORT Selector: public MarSystem 00056 { 00057 private: 00058 void addControls(); 00059 void myUpdate(MarControlPtr sender); 00060 00061 MarControlPtr ctrl_enabled_; 00062 00063 bool is_enabled(const realvec & mask, int index) 00064 { 00065 return index >= mask.getSize() || 00066 (index >= 0 && mask(index) > 0); 00067 } 00068 00069 void set_enabled(realvec & mask, int index, bool enabled) 00070 { 00071 if (index < 0) 00072 return; 00073 fit_mask(mask, index); 00074 mask(index) = enabled ? 1.0 : 0.0; 00075 } 00076 00077 void set_enabled_range(realvec & mask, int begin, int end, bool enabled) 00078 { 00079 if (end < begin || end < 0) 00080 return; 00081 fit_mask(mask, end); 00082 begin = std::max(0, begin); 00083 for (int i = begin; i <= end; ++i) 00084 mask(i) = enabled ? 1.0 : 0.0; 00085 } 00086 00087 void fit_mask(realvec & mask, int max_index) 00088 { 00089 if (max_index < mask.getSize()) 00090 return; 00091 int current_size = mask.getSize(); 00092 int new_size = max_index+1; 00093 mask.stretch(new_size); 00094 // initialize as enabled: 00095 for (int i = current_size; i < new_size; ++i) 00096 mask(i) = 1.0; 00097 } 00098 00099 int enabled_count(const realvec & mask, int total) 00100 { 00101 int count = 0; 00102 for (int i = 0; i < total; i++) 00103 if (is_enabled(mask, i)) 00104 count++; 00105 return count; 00106 } 00107 00108 public: 00109 Selector(std::string name); 00110 Selector(const Selector& a); 00111 ~Selector(); 00112 MarSystem* clone() const; 00113 00114 void myProcess(realvec& in, realvec& out); 00115 }; 00116 00117 } 00118 00119 #endif 00120