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      1 # Copyright 2013 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.image
     16 import its.caps
     17 import its.device
     18 import its.objects
     19 import its.target
     20 import os.path
     21 
     22 def main():
     23     """Test that the android.flash.mode parameter is applied.
     24     """
     25     NAME = os.path.basename(__file__).split(".")[0]
     26 
     27     with its.device.ItsSession() as cam:
     28         props = cam.get_camera_properties()
     29         its.caps.skip_unless(its.caps.compute_target_exposure(props) and
     30                              its.caps.flash(props) and
     31                              its.caps.per_frame_control(props))
     32 
     33         flash_modes_reported = []
     34         flash_states_reported = []
     35         g_means = []
     36 
     37         # Manually set the exposure to be a little on the dark side, so that
     38         # it should be obvious whether the flash fired or not, and use a
     39         # linear tonemap.
     40         e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"]
     41         e /= 4
     42         req = its.objects.manual_capture_request(s, e, 0.0, True, props)
     43 
     44         for f in [0,1,2]:
     45             req["android.flash.mode"] = f
     46             cap = cam.do_capture(req)
     47             flash_modes_reported.append(cap["metadata"]["android.flash.mode"])
     48             flash_states_reported.append(cap["metadata"]["android.flash.state"])
     49             img = its.image.convert_capture_to_rgb_image(cap)
     50             its.image.write_image(img, "%s_mode=%d.jpg" % (NAME, f))
     51             tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1)
     52             rgb = its.image.compute_image_means(tile)
     53             g_means.append(rgb[1])
     54 
     55         assert(flash_modes_reported == [0,1,2])
     56         assert(flash_states_reported[0] not in [3,4])
     57         assert(flash_states_reported[1] in [3,4])
     58         assert(flash_states_reported[2] in [3,4])
     59 
     60         print "G brightnesses:", g_means
     61         assert(g_means[1] > g_means[0])
     62         assert(g_means[2] > g_means[0])
     63 
     64 if __name__ == '__main__':
     65     main()
     66 
     67