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# 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.image
import its.device
import its.objects
import its.target
import pylab
import os.path
import matplotlib
import matplotlib.pyplot
def main():
"""Test that the android.flash.mode parameter is applied.
"""
NAME = os.path.basename(__file__).split(".")[0]
MIN_BRIGHTNESS_DELTA = 0.1
with its.device.ItsSession() as cam:
flash_modes_reported = []
flash_states_reported = []
g_means = []
# Manually set the exposure to be a little on the dark side, so that
# it should be obvious whether the flash fired or not, and use a
# linear tonemap.
e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"]
e /= 4
req = its.objects.manual_capture_request(s, e, True)
for f in [0,1,2]:
req["android.flash.mode"] = f
cap = cam.do_capture(req)
flash_modes_reported.append(cap["metadata"]["android.flash.mode"])
flash_states_reported.append(cap["metadata"]["android.flash.state"])
img = its.image.convert_capture_to_rgb_image(cap)
its.image.write_image(img, "%s_mode=%d.jpg" % (NAME, f))
tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1)
rgb = its.image.compute_image_means(tile)
g_means.append(rgb[1])
assert(flash_modes_reported == [0,1,2])
assert(flash_states_reported[0] not in [3,4])
assert(flash_states_reported[1] in [3,4])
assert(flash_states_reported[2] in [3,4])
print "G brightnesses:", g_means
assert(g_means[1] > g_means[0] + MIN_BRIGHTNESS_DELTA)
assert(g_means[2] > g_means[0] + MIN_BRIGHTNESS_DELTA)
if __name__ == '__main__':
main()
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