def convert_to_real_time(data, delete_ofls=True):
"""
Change the event time of each record into the actual time (since starting)
the measurment, given in ps.
"""
if len(data) == 0:
return np.zeros((0, 3), dtype='u8')
t0 = time.time()
print '* convert event time to real time... ',
data = T2_tools.convert_to_real_time_ps(data)
t1 = time.time() - t0
print 'done ({:.2f} s).'.format(t1)
if delete_ofls:
t0 = time.time()
print '* delete overflows... ',
data = np.delete(data, np.where(data[:,1]==63)[0], axis=0)
t1 = time.time() - t0
print 'done ({:.2f} s).'.format(t1)
return data
