1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
#include <lsl_c.h>
#include <stdio.h>
int main(int argc, char *argv[]) {
int c; /* channel index */
lsl_xml_ptr desc, chns, chn, cap; /* some xml element pointers */
lsl_outlet outlet; /* stream outlet */
lsl_streaminfo info, inf; /* streaminfo objects */
lsl_inlet inlet; /* a stream inlet to get samples from */
int errcode; /* error code (lsl_lost_error or timeouts) */
const char *labels[] = {"C3", "C4", "Cz", "FPz", "POz", "CPz", "O1", "O2"};
/* create a new streaminfo and declare some meta-data (in accordance with XDF format) */
const char *name = argc > 1 ? argv[1] : "MetaTester";
info = lsl_create_streaminfo(name, "EEG", 8, 100, cft_float32, "myuid323457");
desc = lsl_get_desc(info);
chns = lsl_append_child(desc, "channels");
for (c = 0; c < 8; c++) {
chn = lsl_append_child(chns, "channel");
lsl_append_child_value(chn, "label", labels[c]);
lsl_append_child_value(chn, "unit", "microvolts");
lsl_append_child_value(chn, "type", "EEG");
}
lsl_append_child_value(desc, "manufacturer", "SCCN");
cap = lsl_append_child(desc, "cap");
lsl_append_child_value(cap, "name", "EasyCap");
lsl_append_child_value(cap, "size", "54");
lsl_append_child_value(cap, "labelscheme", "10-20");
/* create outlet for the stream */
outlet = lsl_create_outlet(info, 0, 360);
/* === the following could run on another computer === */
/* resolve the stream and open an inlet */
lsl_resolve_byprop(&info, 1, "name", "MetaTester", 1, LSL_FOREVER);
inlet = lsl_create_inlet(info, 360, LSL_NO_PREFERENCE, 1);
inf = lsl_get_fullinfo(inlet, LSL_FOREVER, &errcode);
printf("The stream's XML meta-data is: \n");
printf("%s\n", lsl_get_xml(inf));
printf("The manufacturer is: %s\n", lsl_child_value_n(lsl_get_desc(inf), "manufacturer"));
printf("The cap circumference is: %s\n",
lsl_child_value_n(lsl_child(lsl_get_desc(inf), "cap"), "size"));
printf("The channel labels are as follows:\n");
chn = lsl_child(lsl_child(lsl_get_desc(inf), "channels"), "channel");
for (c = 0; c < lsl_get_channel_count(inf); c++) {
printf(" %s\n", lsl_child_value_n(chn, "label"));
chn = lsl_next_sibling(chn);
}
/* destroy objects and free memory */
lsl_destroy_streaminfo(inf);
lsl_destroy_inlet(inlet);
lsl_destroy_outlet(outlet);
lsl_destroy_streaminfo(info);
/* wait for keypress */
getchar();
return 0;
}
|
