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.device 16 import its.target 17 import sys 18 19 def main(): 20 """Set the target exposure. 21 22 This program is just a wrapper around the its.target module, to allow the 23 functions in it to be invoked from the command line. 24 25 Usage: 26 python config.py - Measure the target exposure, and cache it. 27 python config.py EXP - Hard-code (and cache) the target exposure. 28 29 The "reboot" or "reboot=<N>" and "camera=<N>" arguments may also be 30 provided, just as with all the test scripts. The "target" argument is 31 may also be provided but it has no effect on this script since the cached 32 exposure value is cleared regardless. 33 34 If no exposure value is provided, the camera will be used to measure 35 the scene and set a level that will result in the luma (with linear 36 tonemap) being at the 0.5 level. This requires camera 3A and capture 37 to be functioning. 38 39 For bring-up purposes, the exposure value may be manually set to a hard- 40 coded value, without the camera having to be able to perform 3A (or even 41 capture a shot reliably). 42 """ 43 44 # Command line args, ignoring any args that will be passed down to the 45 # ItsSession constructor. 46 args = [s for s in sys.argv if s[:6] not in \ 47 ["reboot", "camera", "target", "device"]] 48 49 if len(args) == 1: 50 with its.device.ItsSession() as cam: 51 # Automatically measure target exposure. 52 its.target.clear_cached_target_exposure() 53 exposure = its.target.get_target_exposure(cam) 54 elif len(args) == 2: 55 # Hard-code the target exposure. 56 exposure = int(args[1]) 57 its.target.set_hardcoded_exposure(exposure) 58 else: 59 print "Usage: python %s [EXPOSURE]" 60 sys.exit(0) 61 print "New target exposure set to", exposure 62 print "This corresponds to %dms at ISO 100" % int(exposure/100/1000000.0) 63 64 if __name__ == '__main__': 65 main() 66 67
