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This program prints annotations in readable form. Its first argument is an annotator name, and its second argument is a record name.
1 #include <stdio.h>
2 #include <wfdb/wfdb.h>
3
4 main(argc, argv)
5 int argc;
6 char *argv[];
7 {
8 WFDB_Anninfo a;
9 WFDB_Annotation annot;
10
11 if (argc < 3) {
12 fprintf(stderr, "usage: %s annotator record\n", argv[0]);
13 exit(1);
14 }
15 a.name = argv[1]; a.stat = WFDB_READ;
16 (void)sampfreq(argv[2]);
17 if (annopen(argv[2], &a, 1) < 0) exit(2);
18 while (getann(0, &annot) == 0)
19 printf("%s (%ld) %s %d %d %d %s\n",
20 timstr(-(annot.time)),
21 annot.time,
22 annstr(annot.anntyp),
23 annot.subtyp, annot.chan, annot.num,
24 (annot.aux != NULL && *annot.aux > 0) ?
25 annot.aux+1 : "");
26 exit(0);
27 }
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(See http://physionet.org/physiotools/wfdb/examples/example3.c for a copy of this program.)
Notes:
The invocation of sampfreq here sets the internal variables needed
by timstr below.
This line gives the annotation time as a time of day. If the base time
is omitted in the header file, or if we used
timstr(annot.time) instead, we would obtain the elapsed time from
the beginning of the record.
This expression evaluates to an empty string unless the aux
string is non-empty. It makes the assumption that aux is a
printable ASCII string; the printable part follows the length
byte.
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