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# Copyright 2022 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.
"""Verifies that flash is fired when lighting conditions are dark."""
import logging
import os.path
import camera_properties_utils
import capture_request_utils
import image_processing_utils
import its_base_test
import its_session_utils
import lighting_control_utils
from mobly import test_runner
AE_MODES = {0: 'OFF', 1: 'ON', 2: 'ON_AUTO_FLASH', 3: 'ON_ALWAYS_FLASH',
4: 'ON_AUTO_FLASH_REDEYE', 5: 'ON_EXTERNAL_FLASH'}
AE_STATES = {0: 'INACTIVE', 1: 'SEARCHING', 2: 'CONVERGED', 3: 'LOCKED',
4: 'FLASH_REQUIRED', 5: 'PRECAPTURE'}
FLASH_STATES = {0: 'FLASH_STATE_UNAVAILABLE', 1: 'FLASH_STATE_CHARGING',
2: 'FLASH_STATE_READY', 3: 'FLASH_STATE_FIRED',
4: 'FLASH_STATE_PARTIAL'}
_GRAD_DELTA_ATOL = 15 # gradiant for tablets as screen aborbs energy
_MEAN_DELTA_ATOL = 15 # mean used for reflective charts
_PATCH_H = 0.25 # center 25%
_PATCH_W = 0.25
_PATCH_X = 0.5 - _PATCH_W/2
_PATCH_Y = 0.5 - _PATCH_H/2
_TEST_NAME = os.path.splitext(os.path.basename(__file__))[0]
VGA_W, VGA_H = 640, 480
_CAPTURE_INTENT_STILL_CAPTURE = 2
_AE_MODE_ON_AUTO_FLASH = 2
_CAPTURE_INTENT_PREVIEW = 1
_CAPTURE_INTENT_STILL_CAPTURE = 2
_AE_PRECAPTURE_TRIGGER_START = 1
_AE_PRECAPTURE_TRIGGER_IDLE = 0
def turn_off_tablet(tablet_device):
output = tablet_device.adb.shell('dumpsys display | grep mScreenState')
output_list = str(output.decode('utf-8')).strip().split(' ')
for val in output_list:
if 'ON' in val:
tablet_device.adb.shell(['input', 'keyevent', 'KEYCODE_POWER'])
def take_captures_with_flash(cam, fmt):
# Run precapture sequence by setting the aePrecapture trigger to
# START and capture intent set to Preview.
preview_req_start = capture_request_utils.auto_capture_request()
preview_req_start[
'android.control.aeMode'] = _AE_MODE_ON_AUTO_FLASH
preview_req_start[
'android.control.captureIntent'] = _CAPTURE_INTENT_PREVIEW
preview_req_start[
'android.control.aePrecaptureTrigger'] = _AE_PRECAPTURE_TRIGGER_START
# Repeat preview requests with aePrecapture set to IDLE
# until AE is converged.
preview_req_idle = capture_request_utils.auto_capture_request()
preview_req_idle[
'android.control.aeMode'] = _AE_MODE_ON_AUTO_FLASH
preview_req_idle[
'android.control.captureIntent'] = _CAPTURE_INTENT_PREVIEW
preview_req_idle[
'android.control.aePrecaptureTrigger'] = _AE_PRECAPTURE_TRIGGER_IDLE
# Single still capture request.
still_capture_req = capture_request_utils.auto_capture_request()
still_capture_req[
'android.control.aeMode'] = _AE_MODE_ON_AUTO_FLASH
still_capture_req[
'android.control.captureIntent'] = _CAPTURE_INTENT_STILL_CAPTURE
still_capture_req[
'android.control.aePrecaptureTrigger'] = _AE_PRECAPTURE_TRIGGER_IDLE
cap = cam.do_capture_with_flash(preview_req_start,
preview_req_idle,
still_capture_req, fmt)
return cap
class AutoFlashTest(its_base_test.ItsBaseTest):
"""Test that flash is fired when lighting conditions are dark."""
def test_auto_flash(self):
logging.debug('AE_MODES: %s', str(AE_MODES))
logging.debug('AE_STATES: %s', str(AE_STATES))
logging.debug('FLASH_STATES: %s', str(FLASH_STATES))
with its_session_utils.ItsSession(
device_id=self.dut.serial,
camera_id=self.camera_id,
hidden_physical_id=self.hidden_physical_id) as cam:
props = cam.get_camera_properties()
props = cam.override_with_hidden_physical_camera_props(props)
test_name = os.path.join(self.log_path, _TEST_NAME)
# check SKIP conditions
first_api_level = its_session_utils.get_first_api_level(self.dut.serial)
camera_properties_utils.skip_unless(
camera_properties_utils.flash(props) and
first_api_level >= its_session_utils.ANDROID13_API_LEVEL)
# establish connection with lighting controller
arduino_serial_port = lighting_control_utils.lighting_control(
self.lighting_cntl, self.lighting_ch)
# turn OFF lights to darken scene
lighting_control_utils.set_lighting_state(
arduino_serial_port, self.lighting_ch, 'OFF')
# turn OFF tablet to darken scene
if self.tablet:
turn_off_tablet(self.tablet)
fmt_name = 'jpeg'
fmt = {'format': fmt_name}
logging.debug('Testing %s format.', fmt_name)
no_flash_exp_x_iso = 0
no_flash_mean = 0
no_flash_grad = 0
flash_exp_x_iso = []
# take capture with no flash as baseline
logging.debug('Taking reference frame with no flash.')
cam.do_3a(do_af=False)
no_flash_req = capture_request_utils.auto_capture_request()
no_flash_req[
'android.control.captureIntent'] = _CAPTURE_INTENT_STILL_CAPTURE
cap = cam.do_capture(no_flash_req, fmt)
metadata = cap['metadata']
exp = int(metadata['android.sensor.exposureTime'])
iso = int(metadata['android.sensor.sensitivity'])
logging.debug('No auto_flash ISO: %d, exp: %d ns', iso, exp)
logging.debug('AE_MODE (cap): %s',
AE_MODES[metadata['android.control.aeMode']])
logging.debug('AE_STATE (cap): %s',
AE_STATES[metadata['android.control.aeState']])
no_flash_exp_x_iso = exp * iso
y, _, _ = image_processing_utils.convert_capture_to_planes(
cap, props)
patch = image_processing_utils.get_image_patch(
y, _PATCH_X, _PATCH_Y, _PATCH_W, _PATCH_H)
no_flash_mean = image_processing_utils.compute_image_means(
patch)[0]*255
no_flash_grad = image_processing_utils.compute_image_max_gradients(
patch)[0]*255
image_processing_utils.write_image(
y, f'{test_name}_{fmt_name}_no_flash_Y.jpg')
# log results
logging.debug('No flash exposure X ISO %d', no_flash_exp_x_iso)
logging.debug('No flash Y grad: %.4f', no_flash_grad)
logging.debug('No flash Y mean: %.4f', no_flash_mean)
# take capture with auto flash enabled
logging.debug('Taking capture with auto flash enabled.')
flash_fired = False
cap = take_captures_with_flash(cam, fmt)
y, _, _ = image_processing_utils.convert_capture_to_planes(
cap, props)
# Save captured image
image_processing_utils.write_image(y,
f'{test_name}_{fmt_name}_flash_Y.jpg')
# evaluate captured image
metadata = cap['metadata']
exp = int(metadata['android.sensor.exposureTime'])
iso = int(metadata['android.sensor.sensitivity'])
logging.debug('cap ISO: %d, exp: %d ns', iso, exp)
logging.debug('AE_MODE (cap): %s',
AE_MODES[metadata['android.control.aeMode']])
ae_state = AE_STATES[metadata['android.control.aeState']]
logging.debug('AE_STATE (cap): %s', ae_state)
flash_state = FLASH_STATES[metadata['android.flash.state']]
logging.debug('FLASH_STATE: %s', flash_state)
# FLASH_REQUIRED and FLASH_FIRED
if ae_state == 'FLASH_REQUIRED' and flash_state == 'FLASH_STATE_FIRED':
logging.debug('Flash fired')
flash_fired = True
flash_exp_x_iso = exp*iso
y, _, _ = image_processing_utils.convert_capture_to_planes(
cap, props)
patch = image_processing_utils.get_image_patch(
y, _PATCH_X, _PATCH_Y, _PATCH_W, _PATCH_H)
flash_mean = image_processing_utils.compute_image_means(
patch)[0]*255
flash_grad = image_processing_utils.compute_image_max_gradients(
patch)[0]*255
if not flash_fired:
raise AssertionError('Flash was not fired.')
# log results
logging.debug('Flash exposure X ISO %d', flash_exp_x_iso)
logging.debug('Flash frames Y grad: %.4f', flash_grad)
logging.debug('Flash frames Y mean: %.4f', flash_mean)
# assert correct behavior
grad_delta = flash_grad - no_flash_grad
mean_delta = flash_mean - no_flash_mean
if not (grad_delta > _GRAD_DELTA_ATOL or
mean_delta > _MEAN_DELTA_ATOL):
raise AssertionError(
f'grad FLASH-OFF: {grad_delta:.3f}, ATOL: {_GRAD_DELTA_ATOL}, '
f'mean FLASH-OFF: {mean_delta:.3f}, ATOL: {_MEAN_DELTA_ATOL}')
# Ensure that the flash is turned OFF after flash was fired.
req = capture_request_utils.auto_capture_request()
req['android.control.captureIntent'] = _CAPTURE_INTENT_STILL_CAPTURE
cap = cam.do_capture(req, fmt)
flash_state_after = FLASH_STATES[cap['metadata']['android.flash.state']]
logging.debug('FLASH_STATE after flash fired: %s', flash_state_after)
if flash_state_after != 'FLASH_STATE_READY':
raise AssertionError('Flash should turn OFF after it was fired.')
# turn lights back ON
lighting_control_utils.set_lighting_state(
arduino_serial_port, self.lighting_ch, 'ON')
if __name__ == '__main__':
test_runner.main()
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