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GrZOH.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 _GRZOH_H_
00025 #define _GRZOH_H_
00026 
00027 #include <VrSigProc.h>
00028 #include <VrComplex.h>
00029 #include <VrInterpolatingSigProc.h>
00030 
00031 template<class iType,class oType> 
00032 class GrZOH : public VrInterpolatingSigProc<iType,oType> {
00033 public: 
00034   virtual const char *name() { return "GrZOH"; }
00035   virtual int work(VrSampleRange output, void *o[],
00036                    VrSampleRange inputs[], void *i[]);
00037   GrZOH(int interp_factor):
00038     VrInterpolatingSigProc<iType,oType>(1,interp_factor){}
00039 };
00040 
00041 template<class iType,class oType> int
00042 GrZOH<iType,oType>::work(VrSampleRange output, void *ao[],
00043                               VrSampleRange inputs[], void *ai[])
00044 {
00045   iType **i = (iType **)ai;
00046   oType **o = (oType **)ao;
00047   int size = output.size;
00048   iType input_symbol;
00049   
00050   for (int insamp = 0; insamp < size/interp; insamp++){
00051     input_symbol = i[0][insamp];
00052     for (int outsamp = 0; outsamp < interp; outsamp++){
00053       *o[0]++ = input_symbol;
00054     }
00055   }
00056   return output.size;
00057 }
00058 
00059 #endif

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