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 #include "SineSource.h" 00020 00021 using namespace std; 00022 using namespace Marsyas; 00023 00024 SineSource::SineSource(mrs_string name):MarSystem("SineSource",name) 00025 { 00026 //type_ = "SineSource"; 00027 //name_ = name; 00028 00029 addControls(); 00030 index_ = 0; 00031 } 00032 00033 SineSource::SineSource( const SineSource & copy ): 00034 MarSystem(copy), 00035 index_(0) 00036 { 00037 freqControl_ = getControl("mrs_real/frequency"); 00038 } 00039 00040 SineSource::~SineSource() 00041 { 00042 } 00043 00044 MarSystem* 00045 SineSource::clone() const 00046 { 00047 return new SineSource(*this); 00048 } 00049 00050 void 00051 SineSource::addControls() 00052 { 00053 addctrl("mrs_real/frequency", 440.0, freqControl_); 00054 } 00055 00056 void 00057 SineSource::myUpdate(MarControlPtr sender) 00058 { 00059 // setctrl("mrs_natural/onSamples", getctrl("mrs_natural/inSamples")); 00060 // setctrl("mrs_natural/onObservations", getctrl("mrs_natural/inObservations")); 00061 // setctrl("mrs_real/osrate", getctrl("mrs_real/israte")); 00062 MarSystem::myUpdate(sender); 00063 00064 wavetableSize_ = 8192; 00065 wavetable_.create((mrs_natural)wavetableSize_); 00066 00067 mrs_real incr = TWOPI / wavetableSize_; 00068 for (mrs_natural t=0; t < wavetableSize_; t++) 00069 wavetable_(t) = (mrs_real)(0.5 * sin(incr * t)); 00070 00071 } 00072 00073 void 00074 SineSource::myProcess(realvec &in, realvec &out) 00075 { 00076 (void) in; 00077 //checkFlow(in,out); 00078 00079 //lmartins: if (mute_) 00080 if(ctrl_mute_->to<mrs_bool>()) 00081 { 00082 out.setval(0.0); 00083 return; 00084 } 00085 00086 mrs_real incr = freqControl_->to<mrs_real>() * wavetableSize_ / israte_; 00087 mrs_natural inSamples = inSamples_; 00088 00089 for (mrs_natural t=0; t < inSamples; t++) 00090 { 00091 out(0,t) = wavetable_((mrs_natural)index_); 00092 index_ += incr; 00093 while (index_ >= wavetableSize_) 00094 index_ -= wavetableSize_; 00095 while (index_ < 0) 00096 index_ += wavetableSize_; 00097 } 00098 } 00099 00100 00101 00102 00103