Marsyas
0.6.0-alpha
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00001 /* 00002 ** Copyright (C) 2009 Stefaan Lippens 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 "SliceDelta.h" 00020 00021 using namespace std; 00022 using namespace Marsyas; 00023 00024 MarSystem* 00025 SliceDelta::clone() const 00026 { 00027 return new SliceDelta(*this); 00028 } 00029 00030 void 00031 SliceDelta::myUpdate(MarControlPtr sender) 00032 { 00033 // Use the default MarSystem setup of equal input/output stream formats. 00034 MarSystem::myUpdate(sender); 00035 00036 // Allocate the previousInput_ buffer based on inObservations and inSamples. 00037 mrs_natural rows = getctrl("mrs_natural/inObservations")->to<mrs_natural>(); 00038 mrs_natural cols = getctrl("mrs_natural/inSamples")->to<mrs_natural>(); 00039 this->previousInputSlice_.stretch(rows, cols); 00040 this->previousInputSlice_.setval(0.0); 00041 } 00042 00043 void 00044 SliceDelta::myProcess(realvec& in, realvec& out) 00045 { 00046 mrs_natural t,o; 00047 // Iterate over observations and samples. 00048 for (o=0; o < inObservations_; o++) 00049 { 00050 for (t = 0; t < inSamples_; t++) 00051 { 00052 // Output the difference with the previous slice. 00053 out(o, t) = in(o, t) - this->previousInputSlice_(o, t); 00054 // Store as previous input sample for later. 00055 this->previousInputSlice_(o, t) = in(o, t); 00056 } 00057 } 00058 }