Android Camera Hacking Academy

on Snapdragon 865 you can put in /vendor/etc/camera/camxoverridesettings.txt systemLogEnable=TRUE logVerboseMask=0x02000000 dumpAEC=0x7 then reboot or restart camera service and in console put. adb shell su logcat -G 256M it would add V/CamX : [ VERB][STATS_AEC] records to logcat output then after running camera you can inside logcat for luxIndex and V/CamX : [ VERB][STATS_AEC] camxaecengine.cpp:3591 GetExposureDataByType() Exposure Time: 32333334, gain: 62.000000, V/CamX : [ VERB][STATS_AEC] camxcaecstatsprocessor.cpp:2322 PublishPropertyPoolFrameControl() AEC: ... (2: 62.000000 32333334) LuxIndex=235.506439 V/CamX : [ VERB][STATS_AEC] camxcaecstatsprocessor.cpp:5811 DumpFrameInfo() [AEC FRAME INFO] ... luxIndex: 376.811584