mp4museum.py

# mp4museum v6 unified - july 2023

# (c) julius schmiedel - http://mp4museum.org

import time, vlc, os, glob
import RPi.GPIO as GPIO
import subprocess

# read audio device config
audiodevice = "0"

if os.path.isfile('/boot/alsa.txt'):
    f = open('/boot/alsa.txt', 'r')
    audiodevice = f.read(1)

# setup GPIO pin
GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)
GPIO.setup(13, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)

# functions to be called by event listener
# with code to filter interference / static discharges
def buttonPause(channel):
    inputfilter = 0
    for x in range(0,200):
        if GPIO.input(11):
            inputfilter = inputfilter + 1
        time.sleep(.001)
    if (inputfilter > 50):
        player.pause()

def buttonNext(channel):
    inputfilter = 0
    for x in range(0,200):
        if GPIO.input(13):
            inputfilter = inputfilter + 1
        time.sleep(.001)
    if (inputfilter > 50):
        player.stop()

# play media with vlc
def vlc_play(source):
    if("loop." in source):
        vlc_instance = vlc.Instance('--input-repeat=999999999 -q -A alsa --alsa-audio-device hw:' + audiodevice)
    else:
        vlc_instance = vlc.Instance('-q -A alsa --alsa-audio-device hw:'+ audiodevice)
    global player
    player = vlc_instance.media_player_new()
    media = vlc_instance.media_new(source)
    player.set_media(media)
    player.play()
    time.sleep(1)
    current_state = player.get_state()
    while current_state == 3 or current_state == 4:
        time.sleep(.01)
        current_state = player.get_state()
    media.release()
    player.release()

# find a file, and if found, return its path (for sync)
def search_file(file_name):
    # Use glob to find files matching the pattern in both directories
    file_path_media = f'/media/*/{file_name}'
    file_path_boot = f'/boot/{file_name}'
    
    matching_files = glob.glob(file_path_media) + glob.glob(file_path_boot)

    if matching_files:
        # Return the first found file name
        return matching_files[0]

    # Return False if the file is not found
    return False


# *** run player ****


# start player twice to make sure it is working
# seems weird but works
vlc_play("/home/pi/mp4museum-boot.mp4")
vlc_play("/home/pi/mp4museum-boot.mp4")

# please do not remove my logo screen
vlc_play("/home/pi/mp4museum.mp4")

# add event listener which reacts to GPIO signal
GPIO.add_event_detect(11, GPIO.RISING, callback = buttonPause, bouncetime = 234)
GPIO.add_event_detect(13, GPIO.RISING, callback = buttonNext, bouncetime = 1234)

# check for sync mode instructions
enableSync = search_file("sync-leader.txt")
syncFile = search_file("sync.mp4")
if syncFile and enableSync:
    print("Sync Mode LEADER:" + syncFile)
    subprocess.run(["omxplayer-sync", "-u", "-m", syncFile]) 

enableSync = search_file("sync-player.txt")
syncFile = search_file("sync.mp4")
if syncFile and enableSync:
    print("Sync Mode PLAYER:" + syncFile)
    subprocess.run(["omxplayer-sync", "-u", "-l",  syncFile]) 

# the loop
while(1):
    for file in sorted(glob.glob(r'/media/*/*.*')):
        vlc_play(file)