| # 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. |
| its.caps.skip_unless(its.caps.sensor_fusion(props)) |
| |
| # 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() |
| |