python-system-info/soundmonitor.py at master · gsfordham/python-system-info · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
#! /usr/env python3
#main.py

#Imports
import alsaaudio
#END imports

#Volume functions
#Reset volume
def reset_volume(mx, rv):
	#Mixer, Reset Volume
	cond1 = isinstance(rv, int) and rv != None
	cond2 = isinstance(mx, alsaaudio.Mixer) and mx != None
	if cond1 and cond2:
		#Configuration is too high
		if rv > 100:
			mx.setvolume(100)
		#Configuration is too low
		elif rv < 0:
			mx.setvolume(0)
		else: #Configuration is valid
			mx.setvolume(rv)
		return True
	else:
		return False

#Mute volume
def mute_volume(mx, muv, mav):
	#Mixer, Mute Volume, Max Volume
	cond1 = isinstance(muv, int) and muv != None
	cond2 = isinstance(mav, int) and mav != None
	cond3 = isinstance(mx, alsaaudio.Mixer) and mx != None
	if cond1 and cond2 and cond3:
		if mav > 0:
			muv = mav
			mx.setvolume(0)
		else:
			mx.setvolume(muv)
		return muv
	else:
		return muv

#Increase volume
def inc_volume(mx, mav, step):
	#Mixer, Mute Volume, Max Volume
	cond1 = isinstance(step, int) and step != None
	cond2 = isinstance(mav, int) and mav != None
	cond3 = isinstance(mx, alsaaudio.Mixer) and mx != None
	if cond1 and cond2 and cond3:
		#Highest channel + step exceeds max volume
		if mav > (100 - step):
			mx.setvolume(100)
		else:
			mx.setvolume(mav + step)
		return True
	else:
		return False

#Decrease volume
def dec_volume(mx, miv, step):
	#Mixer, Mute Volume, Max Volume
	cond1 = isinstance(step, int) and step != None
	cond2 = isinstance(miv, int) and miv != None
	cond3 = isinstance(mx, alsaaudio.Mixer) and mx != None
	if cond1 and cond2 and cond3:
		#Lowering by one step is less than muted
		if miv < step:
			mx.setvolume(0)
		else:
			mx.setvolume(miv - step)
		return True
	else:
		return False
#END volume functions