Main Page | Namespace List | Class Hierarchy | Class List | File List | Namespace Members | Class Members | File Members | Related Pages

GrAGC.h

Go to the documentation of this file.
00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2002 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 2, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00020 * Boston, MA 02111-1307, USA. 00021 */ 00022 00023 00024 #ifndef _GRAGC_H_ 00025 #define _GRAGC_H_ 00026 00027 #include <VrSigProc.h> 00028 00029 template<class iType,class oType> 00030 class GrAGC : public VrSigProc { 00031 protected: 00032 double k; 00033 double power; 00034 virtual void initialize(); 00035 public: 00036 virtual const char *name() { return "GrAGC"; } 00037 virtual int work(VrSampleRange output, void *ao[], 00038 VrSampleRange inputs[], void *ai[]); 00039 GrAGC(double k):VrSigProc(1,sizeof(iType),sizeof(oType)),k(k) { } 00040 }; 00041 00042 template<class iType,class oType> int 00043 GrAGC<iType,oType>::work(VrSampleRange output, void *ao[], 00044 VrSampleRange inputs[], void *ai[]) 00045 { 00046 iType **i = (iType **)ai; 00047 oType **o = (oType **)ao; 00048 double inv_gain; 00049 int size = output.size; 00050 while(size -- > 0) { 00051 power = power + ((*i[0] * *i[0]) - power)/k; 00052 inv_gain = sqrt(power); 00053 *o[0]++ = (*i[0]++ / inv_gain); 00054 } 00055 return output.size; 00056 } 00057 00058 template<class iType,class oType> void 00059 GrAGC<iType,oType>::initialize() 00060 { 00061 power = 1; 00062 } 00063 #endif

Generated on Wed Aug 4 02:22:03 2004 for GNU Radio by doxygen 1.3.8