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_DELAY_H 00020 #define MARSYAS_DELAY_H 00021 00022 #include "MarSystem.h" 00023 00024 namespace Marsyas 00025 { 00044 class Delay: public MarSystem 00045 { 00046 private: 00047 void addControls(); 00048 void myUpdate(MarControlPtr sender); 00049 00050 // required for allocating the delay buffer 00051 mrs_natural nextPowOfTwo (mrs_natural value); 00052 // get the increment per sample for the delay control value 00053 static void getLinearInterPInc (const mrs_realvec startVal, const mrs_realvec stopVal, mrs_realvec &incVal, const mrs_natural numSamples); 00054 00055 // conversion functions 00056 mrs_real samples2Seconds (mrs_real samples); 00057 mrs_real seconds2Samples (mrs_real seconds); 00058 mrs_realvec samples2Seconds (mrs_realvec samples); 00059 mrs_realvec seconds2Samples (mrs_realvec seconds); 00060 00061 // parameters 00062 mrs_real maxDelayLengthInSamples_, 00063 singleDelayInSamples_; 00064 00066 mrs_realvec buffer_; 00067 00068 00069 mrs_realvec delayInSamples_, 00070 prevDelayInSamples_, 00071 ctrlIncrement_; 00072 00073 mrs_natural writeCursor_, 00074 cursorMask_; 00075 00076 public: 00077 Delay(std::string name); 00078 ~Delay(); 00079 MarSystem* clone() const; 00080 00081 void myProcess(realvec& in, realvec& out); 00082 00083 protected: 00084 Delay(const Delay& a); 00085 00086 }; 00087 00088 }//namespace Marsyas 00089 00090 #endif
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