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GrMultiply.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 _GRMULTIPLY_H_
00025 #define _GRMULTIPLY_H_
00026 
00027 #include <VrSigProc.h>
00028 
00029 template<class iType,class oType> 
00030 class GrMultiply : public VrSigProc {
00031 public: 
00032   virtual const char *name() { return "GrMultiply"; }
00033   virtual int work(VrSampleRange output, void *o[],
00034                    VrSampleRange inputs[], void *i[]);
00035   virtual void initialize() {
00036 #if 0
00037     //work on 8-units blocks
00038     setHistory(8);
00039     setOutputSize(8);
00040 #endif
00041   };
00042   GrMultiply();
00043 };
00044 
00045 template<class iType,class oType> int
00046 GrMultiply<iType,oType>::work(VrSampleRange output, void *ao[],
00047                               VrSampleRange inputs[], void *ai[])
00048 {
00049   iType **i = (iType **)ai;
00050   oType **o = (oType **)ao;
00051   int size = output.size;
00052   int ni = getNumberInputs();
00053   oType temp;
00054 
00055   while(size-- > 0) {
00056     {
00057         temp = *i[0]++;
00058         int j=1;
00059         while(j < ni)
00060           temp *= *i[j++]++;
00061         *o[0]++ = temp;
00062     }
00063   }
00064   return output.size;
00065 }
00066 
00067 template<class iType,class oType> 
00068 GrMultiply<iType,oType>::GrMultiply()
00069   : VrSigProc(1, sizeof(iType), sizeof(oType))
00070 {
00071 }
00072 #endif

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