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 15 import its.device 16 import its.objects 17 import its.caps 18 import time 19 20 def 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 its.caps.skip_unless(its.caps.sensor_fusion(props)) 29 30 # Get the timestamp of a captured image. 31 req, fmt = its.objects.get_fastest_manual_capture_settings(props) 32 cap = cam.do_capture(req, fmt) 33 ts_image0 = cap['metadata']['android.sensor.timestamp'] 34 35 # Get the timestamps of motion events. 36 print "Reading sensor measurements" 37 cam.start_sensor_events() 38 time.sleep(0.5) 39 events = cam.get_sensor_events() 40 assert(len(events["gyro"]) > 0) 41 assert(len(events["accel"]) > 0) 42 assert(len(events["mag"]) > 0) 43 ts_gyro0 = events["gyro"][0]["time"] 44 ts_gyro1 = events["gyro"][-1]["time"] 45 ts_accel0 = events["accel"][0]["time"] 46 ts_accel1 = events["accel"][-1]["time"] 47 ts_mag0 = events["mag"][0]["time"] 48 ts_mag1 = events["mag"][-1]["time"] 49 50 # Get the timestamp of another image. 51 cap = cam.do_capture(req, fmt) 52 ts_image1 = cap['metadata']['android.sensor.timestamp'] 53 54 print "Image timestamps:", ts_image0, ts_image1 55 print "Gyro timestamps:", ts_gyro0, ts_gyro1 56 print "Accel timestamps:", ts_accel0, ts_accel1 57 print "Mag timestamps:", ts_mag0, ts_mag1 58 59 # The motion timestamps must be between the two image timestamps. 60 assert ts_image0 < min(ts_gyro0, ts_accel0, ts_mag0) < ts_image1 61 assert ts_image0 < max(ts_gyro1, ts_accel1, ts_mag1) < ts_image1 62 63 if __name__ == '__main__': 64 main() 65 66
