void read_my_header(char *filename, struct edf_hdr_struct *hdr, const char *md5checksum)
{
if( edfopen_file_readonly(filename, hdr, EDFLIB_READ_ALL_ANNOTATIONS, md5checksum) ) // Open the file and read out the hdr info.
{
switch(hdr->filetype)
{
case EDFLIB_MALLOC_ERROR : printf("\nmalloc error\n\n"); break;
case EDFLIB_NO_SUCH_FILE_OR_DIRECTORY : printf("\nI cannot open file %s.\n\n", filename); break;
case EDFLIB_FILE_CONTAINS_FORMAT_ERRORS : printf("\nThe file is not EDF(+) or BDF(+) compliant.\n" "It contains format errors\n\n"); break;
case EDFLIB_MAXFILES_REACHED : printf("\nToo many files have been opened.\n\n"); break;
case EDFLIB_FILE_READ_ERROR : printf("\na read error occurred\n\n"); break;
case EDFLIB_FILE_ALREADY_OPENED : printf("\nfile has already been opened\n\n"); break;
default : printf("\nUnknown error.\n\n"); break;
}
}
}
void UI_BIOSEMI2BDFPLUSwindow::SelectFileButton()
{
int i, j, k,
error,
hdl_in,
hdl_out,
edfsignals,
status_signal=0,
status_samples_in_datarecord=0,
rising_edge,
set_duration,
status[24],
totalSamplesInDatarecord,
*buf,
buf_offset[EDFLIB_MAXSIGNALS],
sf,
new_sf,
samplerate_divider;
char str[2048],
triggerlabel[24][64],
outputfilename[MAX_PATH_LENGTH];
long long datarecords,
status_sample_duration,
trigger_cnt,
progress_steps;
struct edf_hdr_struct hdr;
struct annotationblock *annotlist=NULL;
struct annotationblock *annotation;
for(i=0; i<16; i++)
{
if(!lineEdit1[i]->text().length())
{
sprintf(str, "Trigger Input label %i is empty!", i + 1);
QMessageBox messagewindow(QMessageBox::Critical, "Error", str);
messagewindow.exec();
return;
}
}
for(i=0; i<16; i++)
{
for(j=0; j<16; j++)
{
if(i != j)
{
if(!strcmp(lineEdit1[i]->text().toLocal8Bit().data(), lineEdit1[j]->text().toLocal8Bit().data()))
{
sprintf(str, "Trigger Input labels %i and %i are the same!", i + 1, j + 1);
QMessageBox messagewindow(QMessageBox::Critical, "Error", str);
messagewindow.exec();
return;
}
}
}
}
str[0] = 0;
strcpy(inputpath, QFileDialog::getOpenFileName(0, "Select inputfile", QString::fromLocal8Bit(recent_opendir), "BDF files (*.bdf *.BDF)").toLocal8Bit().data());
if(!strcmp(inputpath, ""))
{
return;
}
get_directory_from_path(recent_opendir, inputpath, MAX_PATH_LENGTH);
error = edfopen_file_readonly(inputpath, &hdr, EDFLIB_DO_NOT_READ_ANNOTATIONS);
if(error < 0)
{
error = hdr.filetype;
switch(error)
{
case EDFLIB_MALLOC_ERROR : strcpy(str, "EDFlib: malloc error.");
break;
case EDFLIB_NO_SUCH_FILE_OR_DIRECTORY : strcpy(str, "EDFlib: no such file or directory.");
break;
case EDFLIB_FILE_CONTAINS_FORMAT_ERRORS : strcpy(str, "EDFlib: file contains format errors.\nOpen the file in EDFbrowser to get more info.");
break;
case EDFLIB_MAXFILES_REACHED : strcpy(str, "EDFlib: maximum amount of files reached.");
break;
case EDFLIB_FILE_READ_ERROR : strcpy(str, "EDFlib: a file read error occurred.");
break;
case EDFLIB_FILE_ALREADY_OPENED : strcpy(str, "EDFlib: file is already opened.");
break;
case EDFLIB_FILETYPE_ERROR : strcpy(str, "EDFlib: filetype error.");
break;
case EDFLIB_FILE_WRITE_ERROR : strcpy(str, "EDFlib: file write error.");
break;
case EDFLIB_NUMBER_OF_SIGNALS_INVALID : strcpy(str, "EDFlib: invalid number of signals.");
break;
case EDFLIB_FILE_IS_DISCONTINUOUS : strcpy(str, "EDFlib: file is discontinuous.");
break;
case EDFLIB_INVALID_READ_ANNOTS_VALUE : strcpy(str, "EDFlib: invalid read annotations argument.");
break;
default : strcpy(str, "EDFlib: unknown error.");
}
QMessageBox messagewindow(QMessageBox::Critical, "Error", str);
messagewindow.exec();
return;
}
hdl_in = hdr.handle;
/////////////////// check file /////////////////////////////////////////////
if(hdr.filetype == EDFLIB_FILETYPE_BDFPLUS)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Selected file is already a BDF-plus file.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
if(hdr.filetype != EDFLIB_FILETYPE_BDF)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Selected file is not a BDF file.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
if(hdr.datarecord_duration != EDFLIB_TIME_DIMENSION)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Datarecord duration of inputfile must be 1 second.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
edfsignals = hdr.edfsignals;
if(edfsignals < 1)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "There are no signals in the selected file.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
sf = hdr.signalparam[0].smp_in_datarecord;
for(i=1; i<edfsignals; i++)
{
if(hdr.signalparam[i].smp_in_datarecord != sf)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "All signals must have the same samplefrequency.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
}
error = 1;
switch(sf)
{
case 16384 : error = 0;
break;
case 8192 : error = 0;
break;
case 4096 : error = 0;
break;
case 2048 : error = 0;
break;
case 1024 : error = 0;
break;
case 512 : error = 0;
break;
case 256 : error = 0;
break;
case 128 : error = 0;
break;
case 64 : error = 0;
break;
case 32 : error = 0;
break;
}
if(error)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Samplefrequency must be 16384, 8192, 4096, 2048, 1024, 512, 256, 128, 64 or 32 Hz.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
for(i=0; i<edfsignals; i++)
{
if(!(strcmp(hdr.signalparam[i].label, "Status ")))
{
status_signal = i;
break;
}
}
if(i == edfsignals)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "There is no Status signal in the selected file.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
totalSamplesInDatarecord = 0;
for(i=0; i<edfsignals; i++)
{
buf_offset[i] = totalSamplesInDatarecord;
if(i == status_signal)
{
status_samples_in_datarecord = hdr.signalparam[i].smp_in_datarecord;
}
totalSamplesInDatarecord += hdr.signalparam[i].smp_in_datarecord;
}
status_sample_duration = EDFLIB_TIME_DIMENSION / (long long)status_samples_in_datarecord;
for(i=0; i<16; i++)
{
strcpy(&triggerlabel[i][0], lineEdit1[i]->text().toUtf8().data());
triggerlabel[i][16] = 0;
}
strcpy(&triggerlabel[16][0], "new epoch");
if(radioButton1->isChecked() == true)
{
rising_edge = 1;
for(i=0; i<16; i++)
{
status[i] = 1;
}
}
else
{
rising_edge = 0;
for(i=0; i<16; i++)
{
status[i] = 0;
}
}
if(checkBox1->isChecked() == true)
{
set_duration = 1;
}
else
{
set_duration = 0;
}
for(i=16; i<24; i++)
{
status[i] = 1;
}
strcpy(outputfilename, inputpath);
remove_extension_from_filename(outputfilename);
strcat(outputfilename, "_+.bdf");
outputpath[0] = 0;
if(recent_savedir[0]!=0)
{
strcpy(outputpath, recent_savedir);
strcat(outputpath, "/");
}
strcat(outputpath, outputfilename);
strcpy(outputpath, QFileDialog::getSaveFileName(0, "Output file", QString::fromLocal8Bit(outputpath), "BDF files (*.bdf *.BDF)").toLocal8Bit().data());
if(!strcmp(outputpath, ""))
{
edfclose_file(hdl_in);
return;
}
get_directory_from_path(recent_savedir, outputpath, MAX_PATH_LENGTH);
if(mainwindow->file_is_opened(outputpath))
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Outputfile is already opened in EDFbrowser.\nClose the file and try again.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
if(!(strcmp(inputpath, outputpath)))
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Inputfile and outputfile are the same.");
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
hdl_out = edfopen_file_writeonly(outputpath, EDFLIB_FILETYPE_BDFPLUS, edfsignals);
if(hdl_out < 0)
{
switch(hdl_out)
{
case EDFLIB_MALLOC_ERROR : strcpy(str, "EDFlib: malloc error.");
break;
case EDFLIB_NO_SUCH_FILE_OR_DIRECTORY : strcpy(str, "EDFlib: no such file or directory.");
break;
case EDFLIB_MAXFILES_REACHED : strcpy(str, "EDFlib: maximum amount of files reached.");
break;
case EDFLIB_FILE_READ_ERROR : strcpy(str, "EDFlib: a file read error occurred.");
break;
case EDFLIB_FILE_ALREADY_OPENED : strcpy(str, "EDFlib: file is already opened.");
break;
case EDFLIB_FILETYPE_ERROR : strcpy(str, "EDFlib: filetype error.");
break;
case EDFLIB_FILE_WRITE_ERROR : strcpy(str, "EDFlib: file write error.");
break;
case EDFLIB_NUMBER_OF_SIGNALS_INVALID : strcpy(str, "EDFlib: invalid number of signals.");
break;
default : strcpy(str, "EDFlib: unknown error.");
}
QMessageBox messagewindow(QMessageBox::Critical, "Error", str);
messagewindow.exec();
edfclose_file(hdl_in);
return;
}
/////////////////// copy header /////////////////////////////////////////////
for(i=0; i<edfsignals; i++)
{
edf_set_samplefrequency(hdl_out, i, hdr.signalparam[i].smp_in_datarecord);
edf_set_physical_maximum(hdl_out, i, hdr.signalparam[i].phys_max);
edf_set_physical_minimum(hdl_out, i, hdr.signalparam[i].phys_min);
edf_set_digital_maximum(hdl_out, i, hdr.signalparam[i].dig_max);
edf_set_digital_minimum(hdl_out, i, hdr.signalparam[i].dig_min);
edf_set_label(hdl_out, i, hdr.signalparam[i].label);
edf_set_prefilter(hdl_out, i, hdr.signalparam[i].prefilter);
edf_set_transducer(hdl_out, i, hdr.signalparam[i].transducer);
edf_set_physical_dimension(hdl_out, i, hdr.signalparam[i].physdimension);
}
edf_set_startdatetime(hdl_out, hdr.startdate_year, hdr.startdate_month, hdr.startdate_day, hdr.starttime_hour, hdr.starttime_minute, hdr.starttime_second);
edf_set_patientname(hdl_out, hdr.patient);
edf_set_recording_additional(hdl_out, hdr.recording);
/////////////////// collect triggers /////////////////////////////////////////////
buf = (int *)malloc(sizeof(int) * status_samples_in_datarecord);
if(buf == NULL)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Malloc error (buf).");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
return;
}
QProgressDialog progress("Collecting triggers...", "Abort", 0, (int)hdr.datarecords_in_file);
progress.setWindowModality(Qt::WindowModal);
progress.setMinimumDuration(200);
progress_steps = hdr.datarecords_in_file / 100LL;
if(progress_steps < 1LL)
{
progress_steps = 1LL;
}
trigger_cnt = 0;
for(datarecords = 0LL; datarecords < hdr.datarecords_in_file; datarecords++)
{
if(trigger_cnt >= ((hdr.datarecords_in_file * 32) - 2))
{
break;
}
if(trigger_cnt >= 100000)
{
break;
}
if(!(datarecords % progress_steps))
{
progress.setValue((int)datarecords);
qApp->processEvents();
if(progress.wasCanceled())
{
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
edfplus_annotation_delete_list(&annotlist);
return;
}
}
if(edfread_digital_samples(hdl_in, status_signal, status_samples_in_datarecord, buf) < 0)
{
progress.reset();
QMessageBox messagewindow(QMessageBox::Critical, "Error", "A read error occurred during the collection of triggers.");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
edfplus_annotation_delete_list(&annotlist);
return;
}
for(i=0; i<status_samples_in_datarecord; i++)
{
for(j=0; j<17; j++)
{
if(((buf[i] & (1 << j)) && !status[j]) || (!(buf[i] & (1 << j)) && status[j])) // rising or falling edge detected
{
if(status[j]) // falling edge detected
{
if((!rising_edge) && (j < 16))
{
annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
if(annotation == NULL)
{
progress.reset();
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Malloc error (annotation).");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
edfplus_annotation_delete_list(&annotlist);
return;
}
annotation->onset = (datarecords * EDFLIB_TIME_DIMENSION) + ((long long)i * status_sample_duration);
annotation->onset += hdr.starttime_subsecond;
strcpy(annotation->annotation, triggerlabel[j]);
edfplus_annotation_add_item(&annotlist, annotation);
trigger_cnt++;
}
else
{
if(set_duration)
{
k = edfplus_annotation_count(&annotlist);
for(; k>0; k--)
{
annotation = edfplus_annotation_item(&annotlist, k - 1);
if(annotation == NULL)
{
break;
}
if(!strcmp(annotation->annotation, triggerlabel[j]))
{
sprintf(str, "%.4f", (double)((datarecords * EDFLIB_TIME_DIMENSION) + ((long long)i * status_sample_duration) - annotation->onset) / (double)EDFLIB_TIME_DIMENSION);
str[15] = 0;
strcpy(annotation->duration, str);
break;
}
}
}
}
status[j] = 0;
}
else // rising edge detected
{
if(rising_edge || (j == 16))
{
annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
if(annotation == NULL)
{
progress.reset();
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Malloc error (annotation).");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
edfplus_annotation_delete_list(&annotlist);
return;
}
annotation->onset = (datarecords * EDFLIB_TIME_DIMENSION) + ((long long)i * status_sample_duration);
annotation->onset += hdr.starttime_subsecond;
strcpy(annotation->annotation, triggerlabel[j]);
edfplus_annotation_add_item(&annotlist, annotation);
trigger_cnt++;
}
else
{
if(set_duration)
{
k = edfplus_annotation_count(&annotlist);
for(; k>0; k--)
{
annotation = edfplus_annotation_item(&annotlist, k - 1);
if(annotation == NULL)
{
break;
}
if(!strcmp(annotation->annotation, triggerlabel[j]))
{
sprintf(str, "%.4f", (double)((datarecords * EDFLIB_TIME_DIMENSION) + ((long long)i * status_sample_duration) - annotation->onset) / (double)EDFLIB_TIME_DIMENSION);
str[15] = 0;
strcpy(annotation->duration, str);
break;
}
}
}
}
status[j] = 1;
}
}
}
}
}
edfwrite_annotation_latin1(hdl_out, 0LL, -1LL, "Recording starts");
j = edfplus_annotation_count(&annotlist);
for(i=0; i<j; i++)
{
annotation = edfplus_annotation_item(&annotlist, i);
if(annotation->duration[0] == 0)
{
edfwrite_annotation_utf8(hdl_out, annotation->onset / 1000LL, -1LL, annotation->annotation);
}
else
{
edfwrite_annotation_utf8(hdl_out, annotation->onset / 1000LL, (long long)(atof(annotation->duration) * 10000.0), annotation->annotation);
}
}
free(buf);
edfwrite_annotation_latin1(hdl_out, hdr.datarecords_in_file * 10000LL, -1LL, "Recording ends");
/////////////////// choose datarecord duration /////////////////////////////////////////////
samplerate_divider = 1;
i = edfplus_annotation_count(&annotlist);
edfplus_annotation_delete_list(&annotlist);
annotlist = NULL;
if(i % 2)
{
i++;
}
i += 2;
while(i > hdr.datarecords_in_file)
{
samplerate_divider *= 2;
i /= 2;
if(samplerate_divider == 32)
{
break;
}
}
if(samplerate_divider > 1)
{
for(i=0; i<edfsignals; i++)
{
edf_set_samplefrequency(hdl_out, i, hdr.signalparam[i].smp_in_datarecord / samplerate_divider);
}
if(edf_set_datarecord_duration(hdl_out, 100000 / samplerate_divider) == -1)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "edf_set_datarecord_duration() returned an error.");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
return;
}
}
new_sf = sf / samplerate_divider;
/////////////////// start conversion /////////////////////////////////////////////
buf = (int *)malloc(sizeof(int) * totalSamplesInDatarecord);
if(buf == NULL)
{
QMessageBox messagewindow(QMessageBox::Critical, "Error", "Malloc error (buf).");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
return;
}
edfrewind(hdl_in, status_signal);
progress.setLabelText("Converting...");
progress.setValue(0);
for(datarecords = 0LL; datarecords < hdr.datarecords_in_file; datarecords++)
{
if(!(datarecords % progress_steps))
{
progress.setValue((int)datarecords);
qApp->processEvents();
if(progress.wasCanceled())
{
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
return;
}
}
for(i=0; i<edfsignals; i++)
{
if(edfread_digital_samples(hdl_in, i, hdr.signalparam[i].smp_in_datarecord, buf + buf_offset[i]) < 0)
{
progress.reset();
QMessageBox messagewindow(QMessageBox::Critical, "Error", "A read error occurred during the conversion.");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
return;
}
}
for(j=0; j<samplerate_divider; j++)
{
for(i=0; i<edfsignals; i++)
{
if(edfwrite_digital_samples(hdl_out, buf + buf_offset[i] + (j * new_sf)) < 0)
{
progress.reset();
QMessageBox messagewindow(QMessageBox::Critical, "Error", "A write error occurred during the conversion.");
messagewindow.exec();
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
return;
}
}
}
}
QApplication::setOverrideCursor(Qt::WaitCursor);
edfclose_file(hdl_in);
edfclose_file(hdl_out);
free(buf);
QApplication::restoreOverrideCursor();
progress.reset();
#ifdef Q_WS_WIN
snprintf(str, 2048, "Done. Converted %I64d input trigger events to BDF+ annotations.\n"
"\nBDF+ file is located at %s", trigger_cnt, outputpath);
#else
snprintf(str, 2048, "Done. Converted %lli input trigger events to BDF+ annotations.\n"
"\nBDF+ file is located at %s", trigger_cnt, outputpath);
#endif
QMessageBox messagewindow(QMessageBox::Information, "Ready", str);
messagewindow.setIconPixmap(QPixmap(":/images/ok.png"));
messagewindow.exec();
}
int main(int argc, char *argv[])
{
int i,
hdl,
channel,
n;
double *buf;
struct edf_hdr_struct hdr;
if(argc!=3)
{
printf("\nusage: test_edflib <file> <signal nr>\n\n");
return(1);
}
channel = atoi(argv[2]);
if(channel<1)
{
printf("\nsignalnumber must be > 0\n\n");
return(1);
}
if(edfopen_file_readonly(argv[1], &hdr, EDFLIB_READ_ALL_ANNOTATIONS))
{
switch(hdr.filetype)
{
case EDFLIB_MALLOC_ERROR : printf("\nmalloc error\n\n");
break;
case EDFLIB_NO_SUCH_FILE_OR_DIRECTORY : printf("\ncan not open file, no such file or directory\n\n");
break;
case EDFLIB_FILE_CONTAINS_FORMAT_ERRORS : printf("\nthe file is not EDF(+) or BDF(+) compliant\n"
"(it contains format errors)\n\n");
break;
case EDFLIB_MAXFILES_REACHED : printf("\nto many files opened\n\n");
break;
case EDFLIB_FILE_READ_ERROR : printf("\na read error occurred\n\n");
break;
case EDFLIB_FILE_ALREADY_OPENED : printf("\nfile has already been opened\n\n");
break;
default : printf("\nunknown error\n\n");
break;
}
return(1);
}
hdl = hdr.handle;
if(channel>(hdr.edfsignals))
{
printf("\nerror: file has %i signals and you selected signal %i\n\n", hdr.edfsignals, channel);
edfclose_file(hdl);
return(1);
}
channel--;
printf("\nlibrary version: %i.%02i\n", edflib_version() / 100, edflib_version() % 100);
printf("\ngeneral header:\n\n");
printf("filetype: %i\n", hdr.filetype);
printf("edfsignals: %i\n", hdr.edfsignals);
#ifdef WIN32
printf("file duration: %I64d seconds\n", hdr.file_duration / EDFLIB_TIME_DIMENSION);
#else
printf("file duration: %lli seconds\n", hdr.file_duration / EDFLIB_TIME_DIMENSION);
#endif
printf("startdate: %i-%i-%i\n", hdr.startdate_day, hdr.startdate_month, hdr.startdate_year);
printf("starttime: %i:%02i:%02i\n", hdr.starttime_hour, hdr.starttime_minute, hdr.starttime_second);
printf("patient: %s\n", hdr.patient);
printf("recording: %s\n", hdr.recording);
printf("patientcode: %s\n", hdr.patientcode);
printf("gender: %s\n", hdr.gender);
printf("birthdate: %s\n", hdr.birthdate);
printf("patient_name: %s\n", hdr.patient_name);
printf("patient_additional: %s\n", hdr.patient_additional);
printf("admincode: %s\n", hdr.admincode);
printf("technician: %s\n", hdr.technician);
printf("equipment: %s\n", hdr.equipment);
printf("recording_additional: %s\n", hdr.recording_additional);
printf("datarecord duration: %f seconds\n", ((double)hdr.datarecord_duration) / EDFLIB_TIME_DIMENSION);
#ifdef WIN32
printf("number of datarecords in the file: %I64d\n", hdr.datarecords_in_file);
printf("number of annotations in the file: %I64d\n", hdr.annotations_in_file);
#else
printf("number of datarecords in the file: %lli\n", hdr.datarecords_in_file);
printf("number of annotations in the file: %lli\n", hdr.annotations_in_file);
#endif
printf("\nsignal parameters:\n\n");
printf("label: %s\n", hdr.signalparam[channel].label);
#ifdef WIN32
printf("samples in file: %I64d\n", hdr.signalparam[channel].smp_in_file);
#else
printf("samples in file: %lli\n", hdr.signalparam[channel].smp_in_file);
#endif
printf("samples in datarecord: %i\n", hdr.signalparam[channel].smp_in_datarecord);
printf("physical maximum: %f\n", hdr.signalparam[channel].phys_max);
printf("physical minimum: %f\n", hdr.signalparam[channel].phys_min);
printf("digital maximum: %i\n", hdr.signalparam[channel].dig_max);
printf("digital minimum: %i\n", hdr.signalparam[channel].dig_min);
printf("physical dimension: %s\n", hdr.signalparam[channel].physdimension);
printf("prefilter: %s\n", hdr.signalparam[channel].prefilter);
printf("transducer: %s\n", hdr.signalparam[channel].transducer);
printf("samplefrequency: %f\n", ((double)hdr.signalparam[channel].smp_in_datarecord / (double)hdr.datarecord_duration) * EDFLIB_TIME_DIMENSION);
struct edf_annotation_struct annot;
printf("\n");
for(i=0; i<hdr.annotations_in_file; i++)
{
if(edf_get_annotation(hdl, i, &annot))
{
printf("\nerror: edf_get_annotations()\n");
edfclose_file(hdl);
return(1);
}
else
{
#ifdef WIN32
printf("annotation: onset is %I64d duration is %s description is %s\n",
annot.onset / EDFLIB_TIME_DIMENSION,
annot.duration,
annot.annotation);
#else
printf("annotation: onset is %lli duration is %s description is %s\n",
annot.onset / EDFLIB_TIME_DIMENSION,
annot.duration,
annot.annotation);
#endif
}
}
n = 200; /* read n samples from the file */
buf = (double *)malloc(sizeof(double[n]));
if(buf==NULL)
{
printf("\nmalloc error\n");
edfclose_file(hdl);
return(1);
}
int x=10; /* start reading x seconds from start of file */
edfseek(hdl, channel, (long long)((((double)x) / ((double)hdr.file_duration / (double)EDFLIB_TIME_DIMENSION)) * ((double)hdr.signalparam[channel].smp_in_file)), EDFSEEK_SET);
n = edfread_physical_samples(hdl, channel, n, buf);
if(n==(-1))
{
printf("\nerror: edf_read_physical_samples()\n");
edfclose_file(hdl);
free(buf);
return(1);
}
printf("\nread %i samples, started at %i seconds from start of file:\n\n", n, x);
for(i=0; i<n; i++)
{
printf("%.0f ", buf[i]);
}
printf("\n\n");
edfclose_file(hdl);
free(buf);
return(0);
}
