CLAM-Development
1.1
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00001 /* 00002 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG) 00003 * UNIVERSITAT POMPEU FABRA 00004 * 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00019 * 00020 */ 00021 00022 #include "SampleAndHold.hxx" 00023 #include "ProcessingFactory.hxx" 00024 00025 namespace CLAM 00026 { 00027 namespace Hidden 00028 { 00029 static const char * metadata[] = { 00030 "key", "SampleAndHold", 00031 "category", "Spectral Transformations", 00032 "description", "SampleAndHold", 00033 0 00034 }; 00035 static FactoryRegistrator<ProcessingFactory, SampleAndHold> reg = metadata; 00036 } 00037 00038 bool SampleAndHold::Do(const Spectrum& in, Spectrum& out) 00039 { 00040 if ( !mConfig.GetPreserveOuts() ) 00041 { 00042 out = in; //TODO big cludge for streaming 00043 } 00044 00045 //first convert from ms to token size 00046 //mFrameSize should be set somehow in the configuration! It is the difference between one frame center and the next 00047 mFrameSize = 1024; 00048 00049 if(mTimeElapsed == 0 ||mAmount.GetLastValue()<1. ) mSpectrum = in; 00050 00051 if (mTimeElapsed>mAmount.GetLastValue()) { 00052 mTimeElapsed = 0; 00053 } 00054 else { 00055 mTimeElapsed += mFrameSize / in.GetSpectralRange() / 0.002; 00056 } 00057 00058 out = mSpectrum; 00059 00060 return true; 00061 } 00062 00063 00064 00065 } 00066