main.py

from detect_presence import PresenceDetector
import gpio
import time
import subprocess
import os
import signal

#detector = PresenceDetector()

play_audio = False
switch_on = False
play_video = True

switch_out_pin = 25
record_input_pin = 24
toggle_input_pin = 23

#True for high, False for low
record_switch_pressed_state = 0
toggle_switch_on_state = 0

is_recording = False

record_process = None
video_process = None
audio_process = None

video_file = 'IMG_0813_VFLIP.MOV'
audio_file = 'IMG_0812.mp3'

x_server = subprocess.Popen('X')

new_env = dict(os.environ, DISPLAY=":0")

while True:
	try:
		# ######   Handle Detection   ######
		#Uncomment this for IR detection
		# if detector.debounce_present():
		# 	play_audio = True
		# 	switch_on = True
		# else:
		# 	play_audio = False
		# 	switch_on = False
		# ###### ###### ###### ###### ######

		######     Handle Toggle    ###### 
		if gpio.read(toggle_input_pin) == toggle_switch_on_state:
			play_audio = True
			switch_on = True
		else:
			play_audio = False
			switch_on = False

		###### Handle record button ######
		record_pin_state = gpio.read(record_input_pin)

		if record_pin_state == record_switch_pressed_state:
			if not is_recording:
				record_process = subprocess.Popen(['arecord',str(time.time())+'.wav'])
				is_recording = True
				print("Starting to record.")
		else:
			if is_recording:
				# record_process.kill()
				os.kill(record_process.pid, signal.SIGTERM)
				is_recording = False
				print("Done recording, terminating.")
		###### ###### ###### ###### ######

		###### Handle Audio Process ######
		if play_audio:
			if audio_process:
				if audio_process.poll() != None:
					#Process finished

					audio_process = subprocess.Popen(['omxplayer', audio_file], stdin=subprocess.PIPE)
					print("Restarting the audio.")
			else:
				audio_process = subprocess.Popen(['omxplayer', audio_file], stdin=subprocess.PIPE)
				print("Starting audio.")
		else:
			if audio_process:
				audio_process.stdin.write('q')
				audio_process.stdin.flush()
				audio_process.terminate()
				audio_process = None
				print("Killing audio.")
		###### ###### ###### ###### ######

		###### Handle Video Process ######
		if play_video:
			if video_process:
				if video_process.poll() != None:
					#Process finished
					video_process = subprocess.Popen(['omxplayer', video_file], env=new_env)
					print("Restarting video.")
			else:
				video_process = subprocess.Popen(['omxplayer', video_file], env=new_env)
				print("Starting video.")
		else:
			if video_process:
				video_process.stdin.write('q')
				video_process.stdin.flush()
				video_process.terminate()
				video_process = None
				print("Terminating video.")
		###### ###### ###### ###### ######

		###### Handle Switch Output ######
		gpio.write(switch_out_pin,switch_on)
		###### ###### ###### ###### ###### 
	except Exception as e:
		print str(e)