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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2020 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2020 Leo Prikler <leo.prikler@student.tugraz.at>
;;;
;;; 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 ;<package>
(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-environment config)
`(;; Define these variables, so that pulseaudio honors /etc.
("PULSE_CONFIG" . "/etc/pulse/daemon.conf")
("PULSE_CLIENTCONFIG" . "/etc/pulse/client.conf")))
(define (pulseaudio-conf-entry arg)
(match arg
((key . value)
(format #f "~a = ~s~%" key value))
((? string? _)
(string-append arg "\n"))))
(define pulseaudio-etc
(match-lambda
(($ <pulseaudio-configuration> client-conf daemon-conf
default-script-file system-script-file)
`(("pulse"
,(file-union
"pulse"
`(("client.conf"
,(apply mixed-text-file "client.conf"
(map pulseaudio-conf-entry client-conf)))
("daemon.conf"
,(apply mixed-text-file "daemon.conf"
"default-script-file = " default-script-file "\n"
(map pulseaudio-conf-entry daemon-conf)))
("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)))
(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
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