1# Copyright 2014 The Android Open Source Project 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import its.device 16import its.objects 17import its.caps 18import time 19 20def main(): 21 """Test if image and motion sensor events are in the same time domain. 22 """ 23 24 with its.device.ItsSession() as cam: 25 props = cam.get_camera_properties() 26 27 # Only run test if the appropriate caps are claimed. 28 if not its.caps.sensor_fusion(props): 29 print "Test skipped" 30 return 31 32 # Get the timestamp of a captured image. 33 req, fmt = its.objects.get_fastest_manual_capture_settings(props) 34 cap = cam.do_capture(req, fmt) 35 ts_image0 = cap['metadata']['android.sensor.timestamp'] 36 37 # Get the timestamps of motion events. 38 print "Reading sensor measurements" 39 cam.start_sensor_events() 40 time.sleep(0.5) 41 events = cam.get_sensor_events() 42 assert(len(events["gyro"]) > 0) 43 assert(len(events["accel"]) > 0) 44 assert(len(events["mag"]) > 0) 45 ts_gyro0 = events["gyro"][0]["time"] 46 ts_gyro1 = events["gyro"][-1]["time"] 47 ts_accel0 = events["accel"][0]["time"] 48 ts_accel1 = events["accel"][-1]["time"] 49 ts_mag0 = events["mag"][0]["time"] 50 ts_mag1 = events["mag"][-1]["time"] 51 52 # Get the timestamp of another image. 53 cap = cam.do_capture(req, fmt) 54 ts_image1 = cap['metadata']['android.sensor.timestamp'] 55 56 print "Image timestamps:", ts_image0, ts_image1 57 print "Gyro timestamps:", ts_gyro0, ts_gyro1 58 print "Accel timestamps:", ts_accel0, ts_accel1 59 print "Mag timestamps:", ts_mag0, ts_mag1 60 61 # The motion timestamps must be between the two image timestamps. 62 assert ts_image0 < min(ts_gyro0, ts_accel0, ts_mag0) < ts_image1 63 assert ts_image0 < max(ts_gyro1, ts_accel1, ts_mag1) < ts_image1 64 65if __name__ == '__main__': 66 main() 67 68