static
int print_cap(struct eegdev* dev)
{
unsigned int sampling_freq, eeg_nmax, sensor_nmax, trigger_nmax;
char *device_type, *device_id;
char prefiltering[128];
int retval;
egd_get_cap(dev, EGD_CAP_DEVTYPE, &device_type);
egd_get_cap(dev, EGD_CAP_DEVID, &device_id);
egd_get_cap(dev, EGD_CAP_FS, &sampling_freq);
eeg_nmax = egd_get_numch(dev, egd_sensor_type("eeg"));
sensor_nmax = egd_get_numch(dev, egd_sensor_type("undefined"));
trigger_nmax = egd_get_numch(dev, egd_sensor_type("trigger"));
egd_channel_info(dev, egd_sensor_type("eeg"), 0,
EGD_PREFILTERING, prefiltering, EGD_EOL);
retval = (int)sampling_freq;
if (!verbose)
return retval;
printf("\tVersion : %s\n"
"\tsystem capabilities:\n"
"\t\tdevice type: %s\n"
"\t\tdevice model: %s\n"
"\t\tsampling frequency: %u Hz\n"
"\t\tnum EEG channels: %u\n"
"\t\tnum sensor channels: %u\n"
"\t\tnum trigger channels: %u\n"
"\t\tprefiltering: %s\n",
egd_get_string(),
device_type, device_id, sampling_freq,
eeg_nmax, sensor_nmax, trigger_nmax, prefiltering);
return retval;
}
int acq_get_info(struct acq* acq, int type)
{
int retval;
if (!acq)
return -EINVAL;
if (type == ACQ_FS)
retval = egd_get_cap(acq->dev, EGD_CAP_FS, NULL);
else if (type == ACQ_NEEG)
retval = acq->grp[0].nch;
else if (type == ACQ_NSENS)
retval = acq->grp[1].nch;
else if (type == ACQ_NTRI)
retval = acq->grp[2].nch;
else
retval = -EINVAL;
return retval;
}
int acq_prepare_rec(struct acq* acq, const char* filename)
{
struct xdf* xdf;
int j, fs;
if (!acq || !filename)
return 0;
// Create the BDF file
xdf = xdf_open(filename, XDF_WRITE, XDF_BDF);
if (!xdf)
goto abort;
// Configuration file general header
fs = egd_get_cap(acq->dev, EGD_CAP_FS, NULL);
xdf_set_conf(xdf, XDF_F_REC_DURATION, 1.0,
XDF_F_REC_NSAMPLE, fs,
XDF_NOF);
// Set up the file recording channels
for (j=0; j<3; j++)
if (setup_xdf_channel_group(acq, j, xdf))
goto abort;
// Make the file ready for recording
xdf_define_arrays(xdf, 3, acq->strides);
if (xdf_prepare_transfer(xdf))
goto abort;
acq->xdf = xdf;
return 0;
abort:
fprintf(stderr, "Preparing recording file: %s\n", strerror(errno));
xdf_close(xdf);
return -1;
}