| # Copyright 2013 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.caps |
| import its.device |
| import its.image |
| import its.objects |
| import its.target |
| |
| NUM_STEPS = 3 |
| ERROR_TOLERANCE = 0.96 # Allow ISO to be rounded down by 4% |
| |
| |
| def main(): |
| """Test android.sensor.sensitivity parameter applied properly in burst. |
| |
| Inspects the output metadata only (not the image data). |
| """ |
| |
| with its.device.ItsSession() as cam: |
| props = cam.get_camera_properties() |
| its.caps.skip_unless(its.caps.manual_sensor(props) and |
| its.caps.per_frame_control(props)) |
| |
| sens_range = props['android.sensor.info.sensitivityRange'] |
| sens_step = (sens_range[1] - sens_range[0]) / NUM_STEPS |
| sens_list = range(sens_range[0], sens_range[1], sens_step) |
| e = min(props['android.sensor.info.exposureTimeRange']) |
| assert e != 0 |
| reqs = [its.objects.manual_capture_request(s, e) for s in sens_list] |
| _, fmt = its.objects.get_fastest_manual_capture_settings(props) |
| |
| caps = cam.do_capture(reqs, fmt) |
| for i, cap in enumerate(caps): |
| s_req = sens_list[i] |
| s_res = cap['metadata']['android.sensor.sensitivity'] |
| msg = 's_write: %d, s_read: %d, TOL: %.2f' % (s_req, s_res, |
| ERROR_TOLERANCE) |
| assert s_req >= s_res, msg |
| assert s_res/float(s_req) > ERROR_TOLERANCE, msg |
| |
| if __name__ == '__main__': |
| main() |
| |