play-alarm-sound

#!/usr/bin/env python3

import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, Gst, GLib
import sys
import os

soundfile = '/usr/share/birdie/splashes.ogg'
volume = 0
volume_increment = 0.03

Gst.init(None)
mainloop = GLib.MainLoop()

pl = Gst.ElementFactory.make("playbin", "player")
pl.set_property('uri','file://'+os.path.abspath(soundfile))
pl.set_property('volume', volume)
pl.set_state(Gst.State.PLAYING)

def increase_volume():
    global volume
    volume = 1.0 if volume + volume_increment >= 1 else volume + volume_increment
    print(f"{round(volume*100)}%")
    pl.set_property('volume', volume)
    return volume < 1.0
GLib.timeout_add_seconds(1, increase_volume)

def bus_call(bus, message, loop):
    global pl
    if message.type == Gst.MessageType.EOS:
        pl.set_state(Gst.State.READY)
        pl.set_state(Gst.State.PLAYING)
    elif message.type == Gst.MessageType.ERROR:
        err, debug = message.parse_error()
        sys.stderr.write(f"Gst Error: {err}: {debug}\n")
        loop.quit()
    return True
bus = pl.get_bus()
bus.add_signal_watch()
bus.connect("message", bus_call, mainloop)

try:
    mainloop.run()
except:
    mainloop.quit()