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GrPAMMod.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 _GRPAMMOD_H_
00025 #define _GRPAMMOD_H_
00026 
00027 #include <VrSigProc.h>
00028 #include <vector>
00029 
00030 using std::vector;
00031 
00032 template<class iType,class oType> 
00033 class GrPAMMod : public VrSigProc {
00034 protected:
00035   vector<oType> constellation;
00036 public: 
00037   virtual const char *name() { return "GrPAMMod"; }
00038   virtual int work(VrSampleRange output, void *o[],
00039                    VrSampleRange inputs[], void *i[]);
00040   GrPAMMod(int bits);
00041 };
00042 
00043 template<class iType,class oType> int
00044 GrPAMMod<iType,oType>::work(VrSampleRange output, void *ao[],
00045                               VrSampleRange inputs[], void *ai[])
00046 {
00047   iType **i = (iType **)ai;
00048   oType **o = (oType **)ao;
00049   int size = output.size;
00050 
00051   while(size-- > 0) {
00052     {
00053         *o[0]++ = constellation[*i[0]++];
00054     }
00055   }
00056   return output.size;
00057 }
00058 
00059 template<class iType,class oType> 
00060 GrPAMMod<iType,oType>::GrPAMMod(int bits)
00061   : VrSigProc(1, sizeof(iType), sizeof(oType))
00062 {
00063   constellation.resize(1<<bits);
00064   for(int i=0; i< ((1<<bits) ); i++)
00065     constellation[i] = -(1<<bits) + 2*i + 1;   // May need to adjust this order
00066 }
00067 #endif

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