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Adds volume control to PICO-8 on the gameshell
# you need to `sudo pip install pyxhook` as it's used to intercept the volume presses
# you will also want to update your launcher to call this script (I just have mine in the pico-8 directory
# and have my PICO-8.sh run:
# SDL_VIDEODRIVER=x11 DISPLAY=:0 python /home/cpi/pico-8/pico-8-volume.py
# video of what it looks like: https://www.youtube.com/watch?v=BAoYapdMiPM
import pygame
import os
import pyxhook
import alsaaudio
import subprocess
import time
from threading import Timer
PROCESS = None
PROCESS_CHECK = None
HOOK = None
VOLUME_SCREEN = None
VOLUME_TIMER = None
def kill_listener():
HOOK.cancel()
def keypress_handler(e):
global VOLUME_TIMER, PROCESS
volume = None
if e.Key == 'P_Subtract':
volume = get_volume() - 3
elif e.Key == 'P_Add':
volume = get_volume() + 3
if volume is not None:
set_volume(volume)
if VOLUME_TIMER:
update_volume()
hide_volume_timer()
else:
show_volume()
def normalize_volume(value):
return min(100, max(0, value))
def get_volume():
m = alsaaudio.Mixer()
return int(m.getvolume()[0])
def set_volume(value):
m = alsaaudio.Mixer()
value = normalize_volume(value)
m.setvolume(value)
def show_volume():
global VOLUME_TIMER, VOLUME_SCREEN
pygame.init()
os.environ['SDL_VIDEO_WINDOW_POS'] = "0,200"
VOLUME_SCREEN = pygame.display.set_mode((320, 40), pygame.NOFRAME)
update_volume()
hide_volume_timer()
def update_volume():
VOLUME_SCREEN.fill(pygame.Color("black"))
if get_volume():
width = (320 - 60) * get_volume() / 100
pygame.draw.rect(VOLUME_SCREEN, (0, 255, 128), pygame.Rect(30, 10, width, 20))
pygame.display.flip()
def hide_volume_timer():
global VOLUME_TIMER
if VOLUME_TIMER:
VOLUME_TIMER.cancel()
update_volume()
VOLUME_TIMER = Timer(2.0, hide_volume)
VOLUME_TIMER.start()
def check_application():
if PROCESS.poll() is 0:
print("killing application")
kill_listener()
exit()
PROCESS_CHECK = Timer(0.5, check_application)
PROCESS_CHECK.start()
def hide_volume():
global VOLUME_TIMER
VOLUME_TIMER = None
pygame.quit()
PROCESS = subprocess.Popen(["/home/cpi/pico-8/pico8_dyn -splore -draw_rect 32,0,256,240"], shell=True)
check_application()
HOOK = pyxhook.HookManager()
HOOK.KeyDown = keypress_handler
HOOK.HookKeyboard
HOOK.start()
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