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VrSum.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  *  Copyright 1997 Massachusetts Institute of Technology
00024  * 
00025  *  Permission to use, copy, modify, distribute, and sell this software and its
00026  *  documentation for any purpose is hereby granted without fee, provided that
00027  *  the above copyright notice appear in all copies and that both that
00028  *  copyright notice and this permission notice appear in supporting
00029  *  documentation, and that the name of M.I.T. not be used in advertising or
00030  *  publicity pertaining to distribution of the software without specific,
00031  *  written prior permission.  M.I.T. makes no representations about the
00032  *  suitability of this software for any purpose.  It is provided "as is"
00033  *  without express or implied warranty.
00034  * 
00035  */
00036 
00037 #ifndef _VRSUM_H_
00038 #define _VRSUM_H_
00039 
00040 #include <VrSigProc.h>
00041 #if defined (ENABLE_MMX)
00042 #include <VrMMX.h>
00043 #endif
00044 
00045 template<class iType,class oType> 
00046 class VrSum : public VrSigProc {
00047 protected:
00048 #if defined (ENABLE_MMX)
00049   char mmxReady;
00050 #endif  
00051 public: 
00052   virtual const char *name() { return "VrSum"; }
00053   virtual int work(VrSampleRange output, void *o[],
00054                    VrSampleRange inputs[], void *i[]);
00055   virtual void initialize() {
00056 #if 0
00057     //work on 8-units blocks
00058     setHistory(8);
00059     setOutputSize(8);
00060 #endif
00061   };
00062   VrSum();
00063 };
00064 
00065 template<class iType,class oType> int
00066 VrSum<iType,oType>::work(VrSampleRange output, void *ao[],
00067                                 VrSampleRange inputs[], void *ai[])
00068 {
00069   iType **i = (iType **)ai;
00070   oType **o = (oType **)ao;
00071   int size = output.size;
00072   int ni = getNumberInputs();
00073   oType temp;
00074 
00075   while(size-- > 0) {
00076 #if 0
00077     int units = availableUnits();
00078     if(availableSpace() < units ) units = availableSpace();
00079     if (n < units) units = n;
00080 
00081 #ifdef XENABLE_MMX
00082     if(mmxReady && getNumberInputs()>1) {
00083       units=units-units%8;
00084       if (PARANOID && units <= 0){
00085         fprintf(stderr, "Can't write any data in VrSum\n");
00086         abort ();
00087       }
00088 
00089       mmxAdd(inputHistoryPtrN(0), inputHistoryPtrN(1),
00090              units, outputWritePtr());
00091       incReadPtrN(0,units);
00092       incReadPtrN(1,units);
00093       int jj=2;
00094       while(jj < getNumberInputs()){
00095         mmxAdd(outputWritePtr(), inputHistoryPtrN(jj),
00096                units, outputWritePtr());
00097       incReadPtrN(jj,units);
00098       jj++;
00099       }
00100 
00101     } else
00102 #endif
00103 #endif
00104     {
00105         temp = *i[0]++;
00106         int j=1;
00107         while(j < ni)
00108           temp += *i[j++]++;
00109         *o[0]++ = temp;
00110     }
00111   }
00112   return output.size;
00113 }
00114 
00115 template<class iType,class oType> 
00116 VrSum<iType,oType>::VrSum()
00117   : VrSigProc(1, sizeof(iType), sizeof(oType))
00118 {
00119 #ifdef ENABLE_MMX
00120   mmxReady=queryMMX();
00121 #endif
00122 }
00123 #endif

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