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GrSSBMod.h

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00001 /* -*- Mode: c++ -*- */ 00002 /* 00003 * Copyright 2001 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 _GRSSBMOD_H_ 00025 #define _GRSSBMOD_H_ 00026 00027 #include <VrSigProc.h> 00028 #include <VrComplex.h> 00029 #include <gr_nco.h> 00030 00031 template<class oType> 00032 class GrSSBMod : public VrSigProc { 00033 private: 00034 gr_nco<float,float> d_nco; 00035 double d_gain; 00036 public: 00037 GrSSBMod (double freq, double gain); 00038 00039 virtual const char *name() { return "GrSSBMod"; } 00040 virtual int work(VrSampleRange output, void *o[], 00041 VrSampleRange inputs[], void *i[]); 00042 00043 // FIXME scale freq? 00044 void set_freq (double freq) { 00045 cerr << "set freq to " << freq << endl; 00046 d_nco.set_freq (freq); 00047 }; 00048 00049 void set_gain (double g) { d_gain = g; }; 00050 }; 00051 00052 template<class oType> int 00053 GrSSBMod<oType>::work(VrSampleRange output, void *ao[], 00054 VrSampleRange inputs[], void *ai[]) 00055 { 00056 VrComplex **i = (VrComplex **)ai; 00057 oType **o = (oType **)ao; 00058 int size = output.size; 00059 00060 for(int x = 0; x < size; x++) 00061 { 00062 *o[0]++ = (oType) ( d_gain * (i[0]->real() * d_nco.cos() 00063 + i[0]->imag() * d_nco.sin() )); 00064 i[0]++; 00065 d_nco.step(); 00066 } 00067 return output.size; 00068 } 00069 00070 template<class oType> 00071 GrSSBMod<oType>::GrSSBMod (double freq, double gain) 00072 : VrSigProc(1, sizeof(VrComplex), sizeof(oType)), d_gain (gain) 00073 { 00074 // FIXME scale freq? 00075 d_nco.set_freq (freq); 00076 } 00077 00078 #endif

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