blob: 57bd4a8f5a62f8be462d5fd392059d79dc608930 (
plain)
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
# ALSA sound support.
{ config, lib, pkgs, ... }:
with lib;
let
inherit (pkgs) alsaUtils;
pulseaudioEnabled = config.hardware.pulseaudio.enable;
in
{
###### interface
options = {
sound = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable ALSA sound.
'';
};
enableOSSEmulation = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable ALSA OSS emulation (with certain cards sound mixing may not work!).
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
defaults.pcm.!card 3
'';
description = ''
Set addition configuration for system-wide alsa.
'';
};
mediaKeys = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable volume and capture control with keyboard media keys.
You want to leave this disabled if you run a desktop environment
like KDE, Gnome, Xfce, etc, as those handle such things themselves.
You might want to enable this if you run a minimalistic desktop
environment or work from bare linux ttys/framebuffers.
Enabling this will turn on <option>services.actkbd</option>.
'';
};
volumeStep = mkOption {
type = types.string;
default = "1";
example = "1%";
description = ''
The value by which to increment/decrement volume on media keys.
See amixer(1) for allowed values.
'';
};
};
};
};
###### implementation
config = mkIf config.sound.enable {
environment.systemPackages = [ alsaUtils ];
environment.etc = mkIf (!pulseaudioEnabled && config.sound.extraConfig != "")
[
{ source = pkgs.writeText "asound.conf" config.sound.extraConfig;
target = "asound.conf";
}
];
# ALSA provides a udev rule for restoring volume settings.
services.udev.packages = [ alsaUtils ];
boot.kernelModules = optional config.sound.enableOSSEmulation "snd_pcm_oss";
systemd.services.alsa-store =
{ description = "Store Sound Card State";
wantedBy = [ "multi-user.target" ];
unitConfig.RequiresMountsFor = "/var/lib/alsa";
unitConfig.ConditionVirtualization = "!systemd-nspawn";
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
ExecStart = "${pkgs.coreutils}/bin/mkdir -p /var/lib/alsa";
ExecStop = "${alsaUtils}/sbin/alsactl store --ignore";
};
};
services.actkbd = mkIf config.sound.mediaKeys.enable {
enable = true;
bindings = [
# "Mute" media key
{ keys = [ 113 ]; events = [ "key" ]; command = "${alsaUtils}/bin/amixer -q set Master toggle"; }
# "Lower Volume" media key
{ keys = [ 114 ]; events = [ "key" "rep" ]; command = "${alsaUtils}/bin/amixer -q set Master ${config.sound.mediaKeys.volumeStep}- unmute"; }
# "Raise Volume" media key
{ keys = [ 115 ]; events = [ "key" "rep" ]; command = "${alsaUtils}/bin/amixer -q set Master ${config.sound.mediaKeys.volumeStep}+ unmute"; }
# "Mic Mute" media key
{ keys = [ 190 ]; events = [ "key" ]; command = "${alsaUtils}/bin/amixer -q set Capture toggle"; }
];
};
};
}
|