def pytestcase_cycle_consistency_read_write(tmpdir, dataset_dir):
"""Tests reading and writing DAT files and that the read write read cycle is consistent"""
filename = os.path.join(dataset_dir,
"metavision_core", "event_io", "recording_td.dat")
record = EventDatReader(filename)
# height, width = record.get_size()
# it is a gen1 recording with no height or width
tmp_filename = str(tmpdir.join("tmp_td.dat"))
writer = DatWriter(tmp_filename, height=480, width=640)
event_buffers = []
for i in range(20):
events = record.load_n_events(1000)
event_buffers.append(events)
writer.write(events)
writer.close()
new_event_buffers = []
new_record = EventDatReader(tmp_filename)
assert new_record.ev_type == 0
assert new_record.get_size() == [480, 640]
assert record.current_time >= new_record.duration_s * 1e6
assert events['t'][-1] == new_record.duration_s * 1e6
assert new_record.event_count() == 20 * 1000
for i, events in enumerate(event_buffers):
new_events = new_record.load_n_events(1000)
assert all([np.allclose(events[name], new_events[name]) for name in events.dtype.names])
assert record.current_event_index() == new_record.current_event_index()
def pytestcase_init(dataset_dir):
"""Tests initialization of all member variables after creation of EventDatReader object from a file"""
filename = os.path.join(dataset_dir,
"metavision_core", "event_io", "recording_td.dat")
record = EventDatReader(filename)
# check that the representation strings Works
print(record)
assert record.ev_type == 12
assert record._ev_size == 8
assert record.get_size() == [480, 640]
assert EV_TYPES[record.ev_type] == [('t', 'u4'), ('_', 'i4')]
assert record.event_count() == 667855
assert record.done is False
assert record.current_time == 0
assert record.current_event_index() == 0
assert record.duration_s == 7.702845
assert record.load_n_events(1).dtype == np.dtype({'names': ['x', 'y', 'p', 't'],
'formats': ['<u2', '<u2', '<i2', '<i8'],
'offsets': [0, 2, 4, 8], 'itemsize': 16})