1# Copyright 2021 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"""Verify camera startup is < 600ms for both front and back primary cameras.
15"""
16
17import logging
18
19from mobly import test_runner
20
21import camera_properties_utils
22import its_base_test
23import its_session_utils
24
25CAMERA_LAUNCH_S_PERFORMANCE_CLASS_THRESHOLD = 600  # ms
26
27
28class CameraLaunchSPerfClassTest(its_base_test.ItsBaseTest):
29  """Test camera launch latency for S performance class as specified in CDD.
30
31  [7.5/H-1-7] MUST have camera2 startup latency (open camera to first preview
32  frame) < 600ms as measured by the CTS camera PerformanceTest under ITS
33  lighting conditions (3000K) for both primary cameras.
34  """
35
36  def test_camera_launch(self):
37    # Open camera with "with" semantics to check skip condition and load chart
38    #
39    with its_session_utils.ItsSession(
40        device_id=self.dut.serial,
41        camera_id=self.camera_id) as cam:
42
43      camera_properties_utils.skip_unless(
44          cam.is_performance_class_primary_camera())
45
46      # Load chart for scene.
47      props = cam.get_camera_properties()
48      its_session_utils.load_scene(
49          cam, props, self.scene, self.tablet, self.chart_distance)
50
51    # Create an its session without opening the camera to test camera launch
52    # latency
53    cam = its_session_utils.ItsSession(
54        device_id=self.dut.serial,
55        camera_id=self.camera_id)
56
57    launch_ms = cam.measure_camera_launch_ms()
58    if launch_ms >= CAMERA_LAUNCH_S_PERFORMANCE_CLASS_THRESHOLD:
59      raise AssertionError(f'camera launch time: {launch_ms} ms, THRESH: '
60                           f'{CAMERA_LAUNCH_S_PERFORMANCE_CLASS_THRESHOLD} ms')
61    else:
62      logging.debug('camera launch time: %.1f ms', launch_ms)
63
64if __name__ == '__main__':
65  test_runner.main()
66