#!/bin/bash

#RESOLUTION="1280x720"
RESOLUTION="1920x1080"
VIDEODEV="/dev/video10"

function unlock {
	### Activates the screen and unlocks the phone
	# Reads the current screen state eturns any combination of ON/OFF and
	# LOCKED/UNLOCKED (i.e. OFF_LOCKED).
	# Works only on NFC enabled phones but alternative methods exist.
	IFS='_' read -ra screenstate <<< $(adb shell dumpsys nfc | awk -F'=' \
		'/mScreenState/ {print $2}')
	# Emulate Power-Button press if screen is OFF.
	[[ ${screenstate[0]} == "OFF" ]] && adb shell input keyevent 26 && \
		echo Screen activated
	# Emulate Menu-button press if phone is locked. Requires the phone to
	# unlock without PIN or password.
	[[ ${screenstate[1]} == "LOCKED" ]] && adb shell input keyevent 82 && \
		echo Device unlocked
}

function blank {
	### Blanks the screen after X seconds
	sleep ${1}
	IFS='_' read -ra screenstate <<< $(adb shell dumpsys nfc | awk -F'=' \
		'/mScreenState/ {print $2}')
	[[ ${screenstate[0]} == "ON" ]] && adb shell input keyevent 26 && \
		echo Screen deactivated
}

# Unlock phone
unlock