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_COMPEXP_H 00020 #define MARSYAS_COMPEXP_H 00021 00022 #include <marsyas/system/MarSystem.h> 00023 00024 namespace Marsyas 00025 { 00047 /* How to use the Compressor/Expander Marsystem 00048 00049 The system can be setup using the marsystem manager 00050 series->addMarSystem(mng.create("CompExp", "compexp")); 00051 00052 Options: Threshold can be set to any value between -1.0 and 1 00053 Compressor -1.0 <= thresh < 0 00054 Expander 0 <= thresh <= 1.0 00055 series->updctrl("CompExp/compexp/mrs_real/thresh", thresh); 00056 00057 Attack time can be calculated using the following formula: at = 1 - exp(-2.2*T/t_AT) 00058 where at = attack time, T = sampling period, t_AT = time parameter 0.00016 < t_AT < 2.6 sec 00059 series->updctrl("CompExp/compexp/mrs_real/rolloff", t_AT); 00060 00061 Release time can be calculated similar to at time: rt = 1 - exp(-2.2*T/t_RT) 00062 where rt = release time, T = sampling period, t_RT = time parameter 0.001 < t_RT < 5.0 msec 00063 series->updctrl("CompExp/compexp/mrs_real/rt", t_RT); 00064 00065 Slope factor: 0 < slope <= 1.0 00066 series->updctrl("CompExp/compexp/mrs_real/rt", slope); 00067 */ 00068 00069 00070 class CompExp: public MarSystem 00071 { 00072 private: 00073 void addControls(); 00074 void myUpdate(MarControlPtr sender); 00075 00076 MarControlPtr ctl_thresh; 00077 MarControlPtr ctl_slope; 00078 MarControlPtr ctl_attack; 00079 MarControlPtr ctl_release; 00080 00081 mrs_real m_thresh; 00082 mrs_real m_thresh_log10; 00083 mrs_real m_slope; 00084 mrs_real m_k_attack; 00085 mrs_real m_k_release; 00086 00087 realvec m_xd; 00088 00089 public: 00090 CompExp(std::string name); 00091 ~CompExp(); 00092 MarSystem* clone() const; 00093 00094 void myProcess(realvec& in, realvec& out); 00095 }; 00096 00097 }//namespace Marsyas 00098 00099 #endif