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# Copyright 2014 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import its.device
import its.objects
import its.caps
import time
def main():
"""Test if image and motion sensor events are in the same time domain.
"""
with its.device.ItsSession() as cam:
props = cam.get_camera_properties()
# Only run test if the appropriate caps are claimed.
if not its.caps.sensor_fusion(props):
print "Test skipped"
return
# Get the timestamp of a captured image.
req, fmt = its.objects.get_fastest_manual_capture_settings(props)
cap = cam.do_capture(req, fmt)
ts_image0 = cap['metadata']['android.sensor.timestamp']
# Get the timestamps of motion events.
print "Reading sensor measurements"
cam.start_sensor_events()
time.sleep(0.5)
events = cam.get_sensor_events()
assert(len(events["gyro"]) > 0)
assert(len(events["accel"]) > 0)
assert(len(events["mag"]) > 0)
ts_gyro0 = events["gyro"][0]["time"]
ts_gyro1 = events["gyro"][-1]["time"]
ts_accel0 = events["accel"][0]["time"]
ts_accel1 = events["accel"][-1]["time"]
ts_mag0 = events["mag"][0]["time"]
ts_mag1 = events["mag"][-1]["time"]
# Get the timestamp of another image.
cap = cam.do_capture(req, fmt)
ts_image1 = cap['metadata']['android.sensor.timestamp']
print "Image timestamps:", ts_image0, ts_image1
print "Gyro timestamps:", ts_gyro0, ts_gyro1
print "Accel timestamps:", ts_accel0, ts_accel1
print "Mag timestamps:", ts_mag0, ts_mag1
# The motion timestamps must be between the two image timestamps.
assert ts_image0 < min(ts_gyro0, ts_accel0, ts_mag0) < ts_image1
assert ts_image0 < max(ts_gyro1, ts_accel1, ts_mag1) < ts_image1
if __name__ == '__main__':
main()
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