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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2020 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2020 Liliana Marie Prikler <liliana.prikler@gmail.com>
;;; Copyright © 2020 Marius Bakke <mbakke@fastmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services sound)
#:use-module (gnu services base)
#:use-module (gnu services configuration)
#:use-module (gnu services shepherd)
#:use-module (gnu services)
#:use-module (gnu system pam)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (guix store)
#:use-module (gnu packages audio)
#:use-module (gnu packages linux)
#:use-module (gnu packages pulseaudio)
#:use-module (ice-9 match)
#:export (alsa-configuration
alsa-service-type
pulseaudio-configuration
pulseaudio-service-type
ladspa-configuration
ladspa-service-type))
;;; Commentary:
;;;
;;; Sound services.
;;;
;;; Code:
;;;
;;; ALSA
;;;
(define-record-type* <alsa-configuration>
alsa-configuration make-alsa-configuration alsa-configuration?
(alsa-plugins alsa-configuration-alsa-plugins ;file-like
(default alsa-plugins))
(pulseaudio? alsa-configuration-pulseaudio? ;boolean
(default #t))
(extra-options alsa-configuration-extra-options ;string
(default "")))
(define alsa-config-file
;; Return the ALSA configuration file.
(match-lambda
(($ <alsa-configuration> alsa-plugins pulseaudio? extra-options)
(apply mixed-text-file "asound.conf"
`("# Generated by 'alsa-service'.\n\n"
,@(if pulseaudio?
`("# Use PulseAudio by default
pcm_type.pulse {
lib \"" ,#~(string-append #$alsa-plugins:pulseaudio
"/lib/alsa-lib/libasound_module_pcm_pulse.so") "\"
}
ctl_type.pulse {
lib \"" ,#~(string-append #$alsa-plugins:pulseaudio
"/lib/alsa-lib/libasound_module_ctl_pulse.so") "\"
}
pcm.!default {
type pulse
fallback \"sysdefault\"
hint {
show on
description \"Default ALSA Output (currently PulseAudio Sound Server)\"
}
}
ctl.!default {
type pulse
fallback \"sysdefault\"
}\n\n")
'())
,extra-options)))))
(define (alsa-etc-service config)
(list `("asound.conf" ,(alsa-config-file config))))
(define alsa-service-type
(service-type
(name 'alsa)
(extensions
(list (service-extension etc-service-type alsa-etc-service)))
(default-value (alsa-configuration))
(description "Configure low-level Linux sound support, ALSA.")))
;;;
;;; PulseAudio
;;;
(define-record-type* <pulseaudio-configuration>
pulseaudio-configuration make-pulseaudio-configuration
pulseaudio-configuration?
(client-conf pulseaudio-client-conf
(default '()))
(daemon-conf pulseaudio-daemon-conf
;; Flat volumes may cause unpleasant experiences to users
;; when applications inadvertently max out the system volume
;; (see e.g. <https://bugs.gnu.org/38172>).
(default '((flat-volumes . no))))
(script-file pulseaudio-script-file
(default (file-append pulseaudio "/etc/pulse/default.pa")))
(system-script-file pulseaudio-system-script-file
(default
(file-append pulseaudio "/etc/pulse/system.pa"))))
(define (pulseaudio-conf-entry arg)
(match arg
((key . value)
(format #f "~a = ~s~%" key value))
((? string? _)
(string-append arg "\n"))))
(define pulseaudio-environment
(match-lambda
(($ <pulseaudio-configuration> client-conf daemon-conf default-script-file)
`(("PULSE_CONFIG" . ,(apply mixed-text-file "daemon.conf"
"default-script-file = " default-script-file "\n"
(map pulseaudio-conf-entry daemon-conf)))
("PULSE_CLIENTCONFIG" . ,(apply mixed-text-file "client.conf"
(map pulseaudio-conf-entry client-conf)))))))
(define pulseaudio-etc
(match-lambda
(($ <pulseaudio-configuration> _ _ default-script-file system-script-file)
`(("pulse"
,(file-union
"pulse"
`(("default.pa" ,default-script-file)
("system.pa" ,system-script-file))))))))
(define pulseaudio-service-type
(service-type
(name 'pulseaudio)
(extensions
(list (service-extension session-environment-service-type
pulseaudio-environment)
(service-extension etc-service-type pulseaudio-etc)
(service-extension udev-service-type (const (list pulseaudio)))))
(default-value (pulseaudio-configuration))
(description "Configure PulseAudio sound support.")))
;;;
;;; LADSPA
;;;
(define-record-type* <ladspa-configuration>
ladspa-configuration make-ladspa-configuration
ladspa-configuration?
(plugins ladspa-plugins (default '())))
(define (ladspa-environment config)
;; Define this variable in the global environment such that
;; pulseaudio swh-plugins (and similar LADSPA plugins) work.
`(("LADSPA_PATH" .
(string-join
',(map (lambda (package) (file-append package "/lib/ladspa"))
(ladspa-plugins config))
":"))))
(define ladspa-service-type
(service-type
(name 'ladspa)
(extensions
(list (service-extension session-environment-service-type
ladspa-environment)))
(default-value (ladspa-configuration))
(description "Configure LADSPA plugins.")))
;;; sound.scm ends here
|