main()
{
WFDB_Anninfo an[2];
char record[8], iann[10], oann[10];
WFDB_Annotation annot;
printf("Type record name: ");
fgets(record, 8, stdin); record[strlen(record)-1] = '\0';
printf("Type input annotator name: ");
fgets(iann, 10, stdin); iann[strlen(iann)-1] = '\0';
printf("Type output annotator name: ");
fgets(oann, 10, stdin); oann[strlen(oann)-1] = '\0';
an[0].name = iann; an[0].stat = WFDB_READ;
an[1].name = oann; an[1].stat = WFDB_WRITE;
if (annopen(record, an, 2) < 0) exit(1);
while (getann(0, &annot) == 0)
if (isqrs(annot.anntyp)) {
annot.anntyp = NORMAL;
if (putann(0, &annot) < 0) break;
}
wfdbquit();
}
main(int argc, char **argv)
{
char *oaname = "gqf";
double HR;
FILE *config = NULL;
int a0 = 0, a1 = 0, **count, dn, i, ibest, ichosen = 0, j, *mbuf,
n, niann = 0, nseg, tdn;
WFDB_Anninfo *a;
WFDB_Annotation annot;
WFDB_Frequency spm;
WFDB_Time t0, tf;
pname = prog_name(argv[0]);
for (i = 1; i < argc; i++) {
if (*argv[i] == '-') switch (*(argv[i]+1)) {
case 'a': /* input annotator names */
for (a0 = a1 = ++i; a1 < argc && *argv[a1] != '-'; a1++, i++)
;
if ((niann = a1 - a0) < 2) {
(void)fprintf(stderr,
"%s: input annotator names must follow -a\n",
pname);
cleanup(1);
}
break;
case 'c': /* configuration file */
if (++i >= argc) {
(void)fprintf(stderr,
"%s: name of configuration file must follow -c\n", pname);
cleanup(1);
}
if ((config = fopen(argv[i], "rt")) == NULL) {
(void)fprintf(stderr,
"%s: can't read configuration file %s\n", pname, argv[i]);
cleanup(1);
}
break;
case 'h': /* help requested */
help();
cleanup(0);
break;
case 'o': /* output annotator name */
if (++i >= argc) {
(void)fprintf(stderr,
"%s: output annotator name must follow -o\n",
pname);
cleanup(1);
}
oaname = argv[i];
break;
case 'r': /* record name */
if (++i >= argc) {
(void)fprintf(stderr, "%s: input record name must follow -r\n",
pname);
cleanup(1);
}
record = argv[i];
break;
default:
(void)fprintf(stderr, "%s: unrecognized option %s\n", pname,
argv[i]);
cleanup(1);
}
else {
(void)fprintf(stderr, "%s: unrecognized argument %s\n", pname,
argv[i]);
cleanup(1);
}
}
/* Quit unless record name and at least two annotator names specified. */
if (record == NULL || niann < 2) {
help();
cleanup(1);
}
/* Set up annotator info. */
a = gcalloc(sizeof(WFDB_Anninfo), niann+1);
for (i = a0, j = 0; i < a1; i++, j++) {
a[j].name = argv[i]; a[j].stat = WFDB_READ;
}
a[j].name = oaname; a[j].stat = WFDB_WRITE;
/* Read a priori physiologic parameters from the configuration file if
available. They can be adjusted in the configuration file for pediatric,
fetal, or animal ECGs. */
if (config) {
char buf[256], *p;
/* Read the configuration file a line at a time. */
while (fgets(buf, sizeof(buf), config)) {
/* Skip comments (empty lines and lines beginning with `#'). */
if (buf[0] == '#' || buf[0] == '\n') continue;
/* Set parameters. Each `getconf' below is executed once for
each non-comment line in the configuration file. */
getconf(HR, "%lf");
}
fclose(config);
}
/* If any a priori parameters were not specified in the configuration file,
initialize them here (using values chosen for adult human ECGs). */
if (HR == 0.0) HR = 75;
spm = 60.0 * sampfreq(record); /* sample intervals per minute */
nseg = strtim("e")/spm; /* number of complete 1-minute intervals */
/* Set up buffer for median calculation. */
mbuf = gcalloc(sizeof(int), niann + 1);
mbuf[niann] = HR; /* initial median is HR */
/* Set up arrays for HR minute-by-minute time series. */
count = gcalloc(sizeof(int *), niann + 1);
for (i = 0; i < niann; i++)
count[i] = gcalloc(sizeof(int), nseg+1);
/* Pass 1: Load the HR arrays. */
if (annopen(record, a, niann) < 0) cleanup(2);
for (i = 0; i < niann; i++) {
for (tf = spm, j = 0; j < nseg+1; tf += spm, j++) {
n = 0;
while (getann(i, &annot) == 0 && annot.time < tf)
if (isqrs(annot.anntyp)) n++;
count[i][j] = n;
}
}
wfdbquit();
/* Pass 2: Select the input annotations to be copied, and copy them. */
if (annopen(record, a, niann+1) < 0) cleanup(2);
for (j = 0, t0 = 0, tf = spm; j < nseg+1; j++, t0 = tf, tf += spm) {
for (i = 0; i < niann; i++)
mbuf[i] = count[i][j];
/* Note that the last element, mbuf[niann], is the previous median. */
qsort(mbuf, niann+1, sizeof(int), icomp);
/* If mbuf has an even number of members, the median is the mean of
the two central values. */
if (niann & 1) mbuf[niann] = (mbuf[(niann-1)/2] + mbuf[(niann+1)/2])/2;
/* Otherwise it's the single central value. */
else mbuf[niann] = mbuf[niann/2];
/* Find the input that best matches the prediction (the median). */
for (i = 0, dn = 9999; i < niann; i++) {
tdn = mbuf[niann] - count[i][j];
if (tdn < 0) tdn = -tdn;
if (tdn < dn) { dn = tdn; ibest = i; }
}
/* If the best match is not the previously chosen input, avoid switching
the input unless it's more than 2 beats further from the median. */
if (ibest != ichosen) {
tdn = mbuf[niann] - count[ichosen][j];
if (tdn < 0) tdn = -tdn;
if (tdn < dn + 3) ibest = ichosen;
}
ichosen = ibest;
/* Copy the chosen annotations for this one-minute segment. */
n = 0;
while (getann(ichosen, &annot) == 0 && n <= count[ichosen][j]) {
if (annot.time >= t0 && isqrs(annot.anntyp)) {
putann(0, &annot);
n++;
}
}
ungetann(ichosen, &annot);
}
cleanup(0);
}
void gettest() /* get next test annotation */
{
static long tt; /* time of previous test beat annotation */
static struct WFDB_ann annot;
tt = t;
t = tprime;
a = aprime;
/* See comments on the similar code in getref(), above. */
if (tt == 0L || t == huge_time ||
(tt <= vfontest && vfontest < t) ||
(tt <= sdontest && sdontest < t) ||
(tt <= pvfontest && pvfontest < t) ||
(tt <= psdontest && psdontest < t))
rr = 0L;
else
rr = t - tt;
if (oflag) test_annot = annot;
while (getann(1, &annot) == 0) {
if (isqrs(annot.anntyp) || Oflag) {
tprime = annot.time;
aprime = amap(annot.anntyp);
return;
}
if (annot.anntyp == NOISE) {
if ((annot.subtyp & 0x30) == 0x30) {
psdontest = sdontest;
psdofftest = sdofftest;
sdontest = annot.time;
if (getann(1, &annot) < 0) {
tprime = huge_time;
aprime = '*';
if (end_time > 0L)
shut_down += end_time - sdontest;
else {
(void)fprintf(stderr,
"%s: unterminated shutdown starting at %s in record %s, annotator %s\n",
pname, timstr(sdontest), record, an[1].name);
(void)fprintf(stderr,
" (not included in shutdown duration measurement)\n");
}
return;
}
if (annot.anntyp == NOISE &&
(annot.subtyp & 0x30) != 0x30)
sdofftest = annot.time;
else {
if (vfofftest > t) sdontest = vfofftest + match_dt;
else sdontest = t + match_dt;
sdofftest = annot.time - match_dt;
if (sdontest > sdofftest) sdontest = sdofftest;
(void)ungetann(0, &annot);
}
/* update shutdown duration tally */
shut_down += sdofftest - sdontest;
}
}
else if (annot.anntyp == VFON) {
pvfontest = vfontest;
pvfofftest = vfofftest;
vfontest = annot.time;
do {
if (getann(1, &annot) < 0) {
tprime = huge_time;
aprime = '*';
return;
}
} while (annot.anntyp != VFOFF);
vfofftest = annot.time;
}
}
tprime = huge_time;
aprime = '*';
}
void getref() /* get next reference beat annotation */
{
static long TT; /* time of previous reference beat annotation */
static struct WFDB_ann annot;
TT = T;
T = Tprime;
A = Aprime;
/* T-TT is not a valid RR interval if T is the time of the first beat,
if TT is the time of the last beat, or if a period of VF or shutdown
occurs between TT and T. */
if (TT == 0L || T == huge_time ||
(TT <= vfonref && vfonref < T) ||
(TT <= sdonref && sdonref < T) ||
(TT <= pvfonref && pvfonref < T) ||
(TT <= psdonref && psdonref < T))
RR = 0L;
else
RR = T - TT;
if (oflag) ref_annot = annot;
/* Read reference annotations until a beat annotation is read, or EOF.
If an expanded output annotation file is required, all annotations
are treated as if they were beat annotations. */
while (getann(0, &annot) == 0) {
if (isqrs(annot.anntyp) || Oflag) { /* beat annotation */
Tprime = annot.time;
Aprime = amap(annot.anntyp);
return;
}
/* Shutdown occurs when neither signal is readable; the beginning of
shutdown is indicated by a NOISE annotation in which bits 4 and 5
of the subtyp field are set, and the end of shutdown is indicated
by a NOISE annotation with any value of `subtyp' for which at least
one of bits 4 and 5 is zero. In AHA DB reference annotation files,
shutdown is indicated by a single shutdown annotation placed roughly
in the middle of the shutdown interval; in this case, shutdown is
assumed to begin match_dt samples after the previous beat annotation
or VFOFF annotation, and is assumed to end match_dt samples before
the next annotation.
*/
else if (annot.anntyp == NOISE) {
if ((annot.subtyp & 0x30) == 0x30) {
psdonref = sdonref;
psdoffref = sdoffref;
sdonref = annot.time;
/* Read next annotation, which should mark end of shutdown. */
if (getann(0, &annot) < 0) { /* EOF before end of shutdown */
Tprime = sdoffref = huge_time;
Aprime = '*';
return;
}
if (annot.anntyp == NOISE &&
(annot.subtyp & 0x30) != 0x30)
sdoffref = annot.time;
else {
if (vfoffref > T) sdonref = vfoffref + match_dt;
else sdonref = T + match_dt;
sdoffref = annot.time - match_dt;
if (sdonref > sdoffref) sdonref = sdoffref;
(void)ungetann(0, &annot);
}
}
}
/* The beginning of ventricular fibrillation is indicated by a VFON
annotation, and its end by a VFOFF annotation; any annotations
between VFON and VFOFF are read and ignored. */
else if (annot.anntyp == VFON) {
pvfonref = vfonref;
pvfoffref = vfoffref;
vfonref = annot.time;
/* Read additional annotations, until end of VF or EOF. */
do {
if (getann(0, &annot) < 0) { /* EOF before end of VF */
Tprime = huge_time;
Aprime = '*';
return;
}
} while (annot.anntyp != VFOFF);
vfoffref = annot.time;
}
}
/* When this statement is reached, there are no more annotations in the
reference annotation file. */
Tprime = huge_time;
Aprime = '*';
}