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GrSimpleScopeSink.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 #ifndef _GRSIMPLESCOPESINK_H_ 00024 #define _GRSIMPLESCOPESINK_H_ 00025 00026 #include <VrSink.h> 00027 #include "VrGUI.h" 00028 00029 00030 extern "C" { 00031 #include <dlfcn.h> 00032 #include <float.h> 00033 #include <math.h> 00034 } 00035 00036 #define XAXIS_NAME "Time" 00037 #define YAXIS_NAME "Amplitude" 00038 00039 00040 template<class iType> 00041 class GrSimpleScopeSink : public VrSink<iType> { 00042 00043 public: 00044 virtual const char *name() { return "GrSimpleScopeSink"; } 00045 00046 virtual int work3(VrSampleRange output, 00047 VrSampleRange inputs[], void *i[]); 00048 00049 void clear() { plot->clear(); } 00050 void set_persistent(int arg_persistent) {plot->set_persistent(arg_persistent); } 00051 00052 GrSimpleScopeSink(VrGUILayout *layout, double arg_ymin, double arg_ymax, 00053 int arg_nPoints = maxnPoints); 00054 ~GrSimpleScopeSink(); 00055 00056 00057 static const int maxnPoints = 1000; // number of points to plot 00058 static const int divisions = 10; // number of x-axis divisions 00059 00060 private: 00061 double *xValues; 00062 double *yValues; // amplitudes to plot on y-axis 00063 int nPoints; // number of points to plot 00064 int ncollected; // current number of points collected 00065 00066 VrGUIPlot *plot; 00067 double ymin, ymax; // possible range of sample values 00068 }; 00069 00070 /***************************************************************************** 00071 * Implementation of template (C++ requires it to be in .h file). 00072 ****************************************************************************/ 00073 00074 00075 /* 00076 * Creates a new GrSimpleScopeSink. 00077 */ 00078 template<class iType> 00079 GrSimpleScopeSink<iType>::GrSimpleScopeSink(VrGUILayout *layout, 00080 double arg_ymin, double arg_ymax, int arg_nPoints) 00081 { 00082 nPoints = arg_nPoints; 00083 if (nPoints > maxnPoints) 00084 nPoints = maxnPoints; 00085 00086 ncollected = 0; 00087 00088 yValues = new double[nPoints]; 00089 xValues = new double[nPoints]; 00090 00091 for (int i = 0; i < nPoints; i++) 00092 xValues[i] = i; 00093 00094 ymin = arg_ymin; 00095 ymax = arg_ymax; 00096 00097 // FIXME remove casts on ymin, ymax... 00098 plot = new VrGUIPlot (layout, XAXIS_NAME, YAXIS_NAME, 1, 00099 0, nPoints, (int) ymin, (int) ymax, nPoints, divisions); 00100 00101 // setOptimalSize(nPoints); 00102 } 00103 00104 template<class iType> int 00105 GrSimpleScopeSink<iType>::work3(VrSampleRange output, 00106 VrSampleRange inputs[], void *ai[]) 00107 { 00108 iType **i = (iType **)ai; 00109 sync(output.index); 00110 00111 unsigned int n; 00112 bool already_output_something_p = false; 00113 00114 for (n = 0; n < output.size; n++){ 00115 yValues[ncollected++] = *i[0]++; 00116 if (ncollected == nPoints){ 00117 if (!already_output_something_p){ 00118 plot->data (xValues, yValues, nPoints); 00119 already_output_something_p = true; 00120 } 00121 ncollected = 0; 00122 } 00123 } 00124 00125 return output.size; 00126 } 00127 00128 template<class iType> 00129 GrSimpleScopeSink<iType>::~GrSimpleScopeSink() 00130 { 00131 delete[] xValues; 00132 delete[] yValues; 00133 // delete plot 00134 } 00135 00136 #endif 00137 00138 00139

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