Marsyas
0.6.0-alpha
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00001 /* 00002 ** Copyright (C) 1998-2011 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 "Gain.h" 00020 #include "../common_source.h" 00021 00022 using namespace Marsyas; 00023 00024 Gain::Gain(mrs_string name):MarSystem("Gain", name) 00025 { 00026 //Add any specific controls needed by Gain 00027 //(default controls all MarSystems should have 00028 //were already added by MarSystem::addControl(), 00029 //called by :MarSystem(name) constructor). 00030 //If no specific controls are needed by a MarSystem 00031 //there is no need to implement and call this addControl() 00032 //method (see for e.g. Rms.cpp) 00033 addControls(); 00034 } 00035 00036 Gain::Gain(const Gain& a) : MarSystem(a) 00037 { 00038 // For any MarControlPtr in a MarSystem 00039 // it is necessary to perform this getctrl 00040 // in the copy constructor in order for cloning to work 00041 ctrl_gain_ = getctrl("mrs_real/gain"); 00042 } 00043 00044 Gain::~Gain() 00045 { 00046 } 00047 00048 MarSystem* 00049 Gain::clone() const 00050 { 00051 return new Gain(*this); 00052 } 00053 00054 void 00055 Gain::addControls() 00056 { 00057 //Add specific controls needed by this MarSystem. 00058 addctrl("mrs_real/gain", 1.0, ctrl_gain_); 00059 } 00060 00061 00062 void 00063 Gain::myUpdate(MarControlPtr sender) 00064 { 00065 // no change to network flow 00066 MarSystem::myUpdate(sender); 00067 } 00068 00069 void 00070 Gain::myProcess(realvec& in, realvec& out) 00071 { 00072 mrs_real gainValue = ctrl_gain_->to<mrs_real>(); 00073 MRSDIAG(type_ << "/" << name_ << "/mrs_real/gain = " << gainValue); 00074 00075 // It is important to loop over both observations 00076 // and channels so that for example a gain can be 00077 // applied to multi-channel signals 00078 for (mrs_natural o=0; o < inObservations_; o++) 00079 { 00080 for (mrs_natural t = 0; t < inSamples_; t++) 00081 { 00082 //apply gain to all channels 00083 out(o,t) = gainValue * in(o,t); 00084 } 00085 } 00086 }