// File: example9.cs I. Henry February 18 2005 // // C# translation of example9.c from the WFDB Programmer's Guide // // Copyright (C) 2005 Isaac C. Henry (ihenry@physionet.org) using System; using Wfdb; public class example9 { static void Main(string[] argv) { int btype, i, j, nbeats = 0, nsig, hwindow, window, stoptime = 0; WFDB_Anninfo a = new WFDB_Anninfo(); WFDB_Annotation annot = new WFDB_Annotation(); if (argv.Length < 2) { Console.WriteLine( "usage: example9 annotator record [beat-type from to]"); // Unlike C programs, C# programs do not have any foolproof way // to discover their own names, so the name is given as a constant // above. The command needed to run this program within a VM // is platform-dependent and likely to be more complex. Environment.Exit(1); } a.name = argv[0]; a.stat = wfdb.WFDB_READ; if ((nsig = wfdb.isigopen(argv[1], null, 0)) < 1) Environment.Exit(2); WFDB_SiginfoArray s = new WFDB_SiginfoArray(nsig); WFDB_SampleArray v = new WFDB_SampleArray(nsig); WFDB_SampleArray vb = new WFDB_SampleArray(nsig); if (wfdb.wfdbinit(argv[1], a, 1, s.cast(), (uint)nsig) != nsig) Environment.Exit(3); hwindow = wfdb.strtim(".05"); window = 2*hwindow + 1; long[,] sum = new long[nsig,window]; btype = (argv.Length > 2) ? wfdb.strann(argv[2]) : wfdb.NORMAL; if (argv.Length > 3) wfdb.iannsettime(wfdb.strtim(argv[3])); WFDB_Siginfo s_0_ = s.getitem(0); if (argv.Length > 4) { if ((stoptime = wfdb.strtim(argv[4])) < 0) stoptime = -stoptime; if (s_0_.nsamp > 0 && stoptime > s_0_.nsamp) stoptime = s_0_.nsamp; } else stoptime = s_0_.nsamp; if (stoptime > 0) stoptime -= hwindow; while (wfdb.getann(0, annot) == 0 && annot.time < hwindow) ; do { if (annot.anntyp != btype) continue; wfdb.isigsettime(annot.time - hwindow - 1); wfdb.getvec(vb.cast()); for (j = 0; j < window && wfdb.getvec(v.cast()) > 0; j++) for (i = 0; i < nsig; i++) sum[i,j] += v.getitem(i) - vb.getitem(i); nbeats++; } while (wfdb.getann(0, annot) == 0 && (stoptime == 0L || annot.time < stoptime)); if (nbeats < 1) { Console.WriteLine("example9: no `" + wfdb.annstr(btype) + "' beats found"); Environment.Exit(4); } Console.WriteLine("Average of {0} `{1}' beats:", nbeats, wfdb.annstr(btype)); for (j = 0; j < window; j++) for (i = 0; i < nsig; i++) Console.Write( "{0:G6}{1}", (double)sum[i,j]/nbeats, ((i < nsig-1) ? "\t" : "\n")); wfdb.wfdbquit(); } }