Idea: Keep backlight on while playing then turn off

Code:

from mpd import MPDClient

from time import sleep, time

from rpi_backlight import Backlight



player = MPDClient()        # setup MPD client to read mpd status

backlight = Backlight()     # setup backlight object



laststate = ""              # holds the last state of mpd through the main loop

timepaused = time()         # holds the time unit was paused or stopped

lastscreenstate = "on"      # last state of the screen through the main loop ("on" or "off")



SCREENONTIME = 5*60         # time screen on for after playing n*60 where n is minutes to stay on for

SCREENBRIGHTNESS = 50       # % screen brightness

SCREENFADETIME = 0.5        # seconds to fade between screen brightness'



backlight.fade_duration = SCREENFADETIME

backlight.brightness = SCREENBRIGHTNESS



while(1): # repeat until able to connect to MPD

    

    try:

        player.connect("localhost", 6600)

        print("connected")

        break

    except:

        print("sleeping")

        sleep(5)





while(1):

    state = player.status()["state"]        # obtain current playback status of mpd

    

    if state != laststate:                  # when playback mode has changed

        print (state)                       # show current mode

        timepaused = time()                 # update time state change happened





    if state == "pause" or state == "stop":                                 # when the playback has paused or stopped

        if time() - timepaused >= SCREENONTIME and lastscreenstate == "on": # if the screen is on and the delay to turn off screen has passed

            backlight.brightness = 0                                        # fade out screen

            lastscreenstate = "off"                                         # mark screen as now off

    elif state == "play" and lastscreenstate == "off":                      # if playing and the screen is off

        backlight.brightness = SCREENBRIGHTNESS                             # turn on the screen to set backlight level

        lastscreenstate = "on"                                              # mark screen as now on

    

    

    laststate = state

    

    sleep(0.1)          # sleep to prevent 100% thread use

Code:

    # Audio output

    CARD_NUM=$(sqlite3 $SQL_DB "SELECT value FROM cfg_mpd WHERE param='device'")

    HW_PARAMS=$(cat /proc/asound/card$CARD_NUM/pcm0p/sub0/hw_params)

    #if [[ $HW_PARAMS != $HW_PARAMS_LAST ]]; then

        TIME_STAMP=$(date +'%Y%m%d %H%M%S')

        if [[ $HW_PARAMS = "closed" ]]; then

            LOG_MSG=" watchdog: Info: Audio output is (closed)"

        else

            TIME_STAMP=$(date +'%Y%m%d %H%M%S')

            LOG_MSG=" watchdog: Info: Audio output is (in use)"

            # Wake display on play

            WAKE_DISPLAY=$(sqlite3 $SQL_DB "SELECT value FROM cfg_system WHERE param='wake_display'")

            if [[ $WAKE_DISPLAY = "1" ]]; then

                export DISPLAY=:0

                xset s reset > /dev/null 2>&1

            fi

        fi

        #echo $TIME_STAMP$LOG_MSG >> /var/log/moode.log

    #fi