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

GrComplexVCOMixer.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 #ifndef _GRCOMPLEXVCOMIXER_H_
00024 #define _GRCOMPLEXVCOMIXER_H_
00025 
00026 #include <VrSigProc.h>
00027 
00028 template<class iType,class oType> 
00029 class GrComplexVCOMixer : public VrSigProc {
00030 protected:
00031   double sensitivity;
00032   double freq;
00033   double arg;
00034   double argInc;
00035   void evaluate(int n);
00036   virtual void initialize();
00037 public: 
00038   virtual const char *name() { return "GrComplexVCOMixer"; }
00039   virtual int work(VrSampleRange output, void *ao[],
00040                    VrSampleRange inputs[], void *ai[]);
00041   GrComplexVCOMixer(double f,double s) :VrSigProc(2,sizeof(iType),sizeof(oType)),sensitivity(s),freq(f),arg(0) { }
00042 };
00043 
00044 template<class iType,class oType> int
00045 GrComplexVCOMixer<iType,oType>::work(VrSampleRange output, void *ao[],
00046                 VrSampleRange inputs[], void *ai[])
00047 {
00048   iType **i = (iType**)ai;
00049   oType **o = (iType**)ao;
00050   int size = output.size;
00051   while(size -- > 0) {
00052     *o[0]++ = (oType) (*i[0] * cos(arg));
00053     *o[1]++ = (oType) (*i[0]++ * sin(arg));
00054     arg += argInc;
00055     argInc =  2*M_PI*(freq + sensitivity * *i[1]++)*(1 / (double)getInputSamplingFrequencyN(0));
00056   }
00057   return output.size;
00058 }
00059 
00060 template<class iType,class oType> void
00061 GrComplexVCOMixer<iType,oType>::initialize()  
00062 {
00063   argInc = 2*M_PI*freq*(1 / (double)getInputSamplingFrequencyN(0));
00064 }
00065 #endif

Generated on Tue Mar 15 23:55:33 2005 for GNU Radio by  doxygen 1.4.0