gpio.py

import vlc
import time
import RPi.GPIO as GPIO

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM) #numbering scheme

GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(27, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(22, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(19, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(4,GPIO.OUT)
GPIO.setup(5,GPIO.OUT)
GPIO.setup(6,GPIO.OUT)


#playlist of songs
plist = ['howLong.mp3', 'godIsAWoman.mp3', 'tillTheWorldEnds.mp3', 'thatsWhatILike.mp3', '24kMagic.mp3']
songIndex = 0
playlistLength = len(plist)

#play the first song
player = vlc.MediaPlayer(plist[4])
player.audio_set_volume(40)
player.play()

go = True

def volume_up(channel):
    
    #raise volume
    #time.sleep(5)
    #if already at max volume, do nothing
    if (player.audio_get_volume() < 100):
        player.audio_set_volume(player.audio_get_volume() + 20)
        GPIO.output(4,GPIO.HIGH)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
            
def volume_down(channel):
    #lower volume
    #time.sleep(5)
    #if already at min volume, do nothing
    if (player.audio_get_volume() > 0):
        player.audio_set_volume(player.audio_get_volume() - 20)
        GPIO.output(5,GPIO.HIGH)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)

def play_pause(channel):
    global go
    
    #turn off
    if(go):
        player.pause()
        go = False
        GPIO.output(6,GPIO.HIGH)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(4,GPIO.LOW)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
    else:
        player.play()
        go = True
        GPIO.output(6,GPIO.HIGH)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(4,GPIO.LOW)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
        
def next_song(channel):
    global songIndex
    #if at last song in playlist, go to beginning
    if (songIndex == playlistLength - 1):
        currentVol = player.audio_get_volume()
        player.pause()
        player = vlc.MediaPlayer(plist[0])
        player.audio_set_volume(currentVol)
        player.play()
        songIndex = 0
        GPIO.output(5,GPIO.HIGH)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(6,GPIO.HIGH)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
    else:
        currentVol = player.audio_get_volume()
        player.pause()
        player = vlc.MediaPlayer(plist[songIndex + 1])
        player.audio_set_volume(currentVol)
        player.play()
        songIndex = songIndex + 1
        GPIO.output(5,GPIO.HIGH)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(6,GPIO.HIGH)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
            
            
def prev_song(channel):
    global songIndex
    #if at first song in playlist, go to end
    if (songIndex == 0):
        currentVol = player.audio_get_volume()
        player.pause()
        player = vlc.MediaPlayer(plist[playlistLength - 1])
        player.audio_set_volume(currentVol)
        player.play()
        songIndex = playlistLength - 1
        GPIO.output(4,GPIO.HIGH)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.HIGH)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
    else:
        currentVol = player.audio_get_volume()
        player.pause()
        player = vlc.MediaPlayer(plist[songIndex - 1])
        player.audio_set_volume(currentVol)
        player.play()
        songIndex = songIndex - 1
        GPIO.output(4,GPIO.HIGH)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.HIGH)
        time.sleep(2)
        GPIO.output(4,GPIO.LOW)
        GPIO.output(5,GPIO.LOW)
        GPIO.output(6,GPIO.LOW)
            

GPIO.add_event_detect(22, GPIO.FALLING, callback=volume_up)
GPIO.add_event_detect(27, GPIO.FALLING, callback=volume_down)
GPIO.add_event_detect(17, GPIO.FALLING, callback=play_pause)
GPIO.add_event_detect(13, GPIO.FALLING, callback=next_song)
GPIO.add_event_detect(19, GPIO.FALLING, callback=prev_song)



#infinite loop
while (True):
    
    #get integer for gesture detected
    #from cameraTest import gesture

    #gesture = GPIO.input(17)
    #print(gesture)
    #gesture_2 = GPIO.input(22)
    #gesture_3 = GPIO.input(27)
    #gesture_4 = GPIO.input(23)
    
    
    #pause/play song
    #time.sleep(5)
    """if (gesture == False):
        player.pause()
        
    #go to next song in playlist
    elif (gesture_4 == True):
        time.sleep(5)
        #if at last song in playlist, go to beginning
        if (songIndex == playlistLength - 1):
            currentVol = player.audio_get_volume()
            player.pause()
            player = vlc.MediaPlayer(plist[0])
            player.audio_set_volume(currentVol)
            player.play()
            songIndex = 0
        else:
            currentVol = player.audio_get_volume()
            player.pause()
            player = vlc.MediaPlayer(plist[songIndex + 1])
            player.audio_set_volume(currentVol)
            player.play()
            songIndex = songIndex + 1
    
    else:
        pass"""