| 1 | ;;; GNU Guix --- Functional package management for GNU |
| 2 | ;;; Copyright © 2018, 2020 Oleg Pykhalov <go.wigust@gmail.com> |
| 3 | ;;; Copyright © 2020 Leo Prikler <leo.prikler@student.tugraz.at> |
| 4 | ;;; Copyright © 2020 Marius Bakke <mbakke@fastmail.com> |
| 5 | ;;; |
| 6 | ;;; This file is part of GNU Guix. |
| 7 | ;;; |
| 8 | ;;; GNU Guix is free software; you can redistribute it and/or modify it |
| 9 | ;;; under the terms of the GNU General Public License as published by |
| 10 | ;;; the Free Software Foundation; either version 3 of the License, or (at |
| 11 | ;;; your option) any later version. |
| 12 | ;;; |
| 13 | ;;; GNU Guix is distributed in the hope that it will be useful, but |
| 14 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | ;;; GNU General Public License for more details. |
| 17 | ;;; |
| 18 | ;;; You should have received a copy of the GNU General Public License |
| 19 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. |
| 20 | |
| 21 | (define-module (gnu services sound) |
| 22 | #:use-module (gnu services base) |
| 23 | #:use-module (gnu services configuration) |
| 24 | #:use-module (gnu services shepherd) |
| 25 | #:use-module (gnu services) |
| 26 | #:use-module (gnu system pam) |
| 27 | #:use-module (gnu system shadow) |
| 28 | #:use-module (guix gexp) |
| 29 | #:use-module (guix packages) |
| 30 | #:use-module (guix records) |
| 31 | #:use-module (guix store) |
| 32 | #:use-module (gnu packages audio) |
| 33 | #:use-module (gnu packages linux) |
| 34 | #:use-module (gnu packages pulseaudio) |
| 35 | #:use-module (ice-9 match) |
| 36 | #:export (alsa-configuration |
| 37 | alsa-service-type |
| 38 | |
| 39 | pulseaudio-configuration |
| 40 | pulseaudio-service-type |
| 41 | |
| 42 | ladspa-configuration |
| 43 | ladspa-service-type)) |
| 44 | |
| 45 | ;;; Commentary: |
| 46 | ;;; |
| 47 | ;;; Sound services. |
| 48 | ;;; |
| 49 | ;;; Code: |
| 50 | |
| 51 | \f |
| 52 | ;;; |
| 53 | ;;; ALSA |
| 54 | ;;; |
| 55 | |
| 56 | (define-record-type* <alsa-configuration> |
| 57 | alsa-configuration make-alsa-configuration alsa-configuration? |
| 58 | (alsa-plugins alsa-configuration-alsa-plugins ;<package> |
| 59 | (default alsa-plugins)) |
| 60 | (pulseaudio? alsa-configuration-pulseaudio? ;boolean |
| 61 | (default #t)) |
| 62 | (extra-options alsa-configuration-extra-options ;string |
| 63 | (default ""))) |
| 64 | |
| 65 | (define alsa-config-file |
| 66 | ;; Return the ALSA configuration file. |
| 67 | (match-lambda |
| 68 | (($ <alsa-configuration> alsa-plugins pulseaudio? extra-options) |
| 69 | (apply mixed-text-file "asound.conf" |
| 70 | `("# Generated by 'alsa-service'.\n\n" |
| 71 | ,@(if pulseaudio? |
| 72 | `("# Use PulseAudio by default |
| 73 | pcm_type.pulse { |
| 74 | lib \"" ,#~(string-append #$alsa-plugins:pulseaudio |
| 75 | "/lib/alsa-lib/libasound_module_pcm_pulse.so") "\" |
| 76 | } |
| 77 | |
| 78 | ctl_type.pulse { |
| 79 | lib \"" ,#~(string-append #$alsa-plugins:pulseaudio |
| 80 | "/lib/alsa-lib/libasound_module_ctl_pulse.so") "\" |
| 81 | } |
| 82 | |
| 83 | pcm.!default { |
| 84 | type pulse |
| 85 | fallback \"sysdefault\" |
| 86 | hint { |
| 87 | show on |
| 88 | description \"Default ALSA Output (currently PulseAudio Sound Server)\" |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | ctl.!default { |
| 93 | type pulse |
| 94 | fallback \"sysdefault\" |
| 95 | }\n\n") |
| 96 | '()) |
| 97 | ,extra-options))))) |
| 98 | |
| 99 | (define (alsa-etc-service config) |
| 100 | (list `("asound.conf" ,(alsa-config-file config)))) |
| 101 | |
| 102 | (define alsa-service-type |
| 103 | (service-type |
| 104 | (name 'alsa) |
| 105 | (extensions |
| 106 | (list (service-extension etc-service-type alsa-etc-service))) |
| 107 | (default-value (alsa-configuration)) |
| 108 | (description "Configure low-level Linux sound support, ALSA."))) |
| 109 | |
| 110 | \f |
| 111 | ;;; |
| 112 | ;;; PulseAudio |
| 113 | ;;; |
| 114 | |
| 115 | (define-record-type* <pulseaudio-configuration> |
| 116 | pulseaudio-configuration make-pulseaudio-configuration |
| 117 | pulseaudio-configuration? |
| 118 | (client-conf pulseaudio-client-conf |
| 119 | (default '())) |
| 120 | (daemon-conf pulseaudio-daemon-conf |
| 121 | ;; Flat volumes may cause unpleasant experiences to users |
| 122 | ;; when applications inadvertently max out the system volume |
| 123 | ;; (see e.g. <https://bugs.gnu.org/38172>). |
| 124 | (default '((flat-volumes . no)))) |
| 125 | (script-file pulseaudio-script-file |
| 126 | (default (file-append pulseaudio "/etc/pulse/default.pa"))) |
| 127 | (system-script-file pulseaudio-system-script-file |
| 128 | (default |
| 129 | (file-append pulseaudio "/etc/pulse/system.pa")))) |
| 130 | |
| 131 | (define (pulseaudio-conf-entry arg) |
| 132 | (match arg |
| 133 | ((key . value) |
| 134 | (format #f "~a = ~s~%" key value)) |
| 135 | ((? string? _) |
| 136 | (string-append arg "\n")))) |
| 137 | |
| 138 | (define pulseaudio-environment |
| 139 | (match-lambda |
| 140 | (($ <pulseaudio-configuration> client-conf daemon-conf default-script-file) |
| 141 | `(("PULSE_CONFIG" . ,(apply mixed-text-file "daemon.conf" |
| 142 | "default-script-file = " default-script-file "\n" |
| 143 | (map pulseaudio-conf-entry daemon-conf))) |
| 144 | ("PULSE_CLIENTCONFIG" . ,(apply mixed-text-file "client.conf" |
| 145 | (map pulseaudio-conf-entry client-conf))))))) |
| 146 | |
| 147 | (define pulseaudio-etc |
| 148 | (match-lambda |
| 149 | (($ <pulseaudio-configuration> _ _ default-script-file system-script-file) |
| 150 | `(("pulse" |
| 151 | ,(file-union |
| 152 | "pulse" |
| 153 | `(("default.pa" ,default-script-file) |
| 154 | ("system.pa" ,system-script-file)))))))) |
| 155 | |
| 156 | (define pulseaudio-service-type |
| 157 | (service-type |
| 158 | (name 'pulseaudio) |
| 159 | (extensions |
| 160 | (list (service-extension session-environment-service-type |
| 161 | pulseaudio-environment) |
| 162 | (service-extension etc-service-type pulseaudio-etc))) |
| 163 | (default-value (pulseaudio-configuration)) |
| 164 | (description "Configure PulseAudio sound support."))) |
| 165 | |
| 166 | \f |
| 167 | ;;; |
| 168 | ;;; LADSPA |
| 169 | ;;; |
| 170 | |
| 171 | (define-record-type* <ladspa-configuration> |
| 172 | ladspa-configuration make-ladspa-configuration |
| 173 | ladspa-configuration? |
| 174 | (plugins ladspa-plugins (default '()))) |
| 175 | |
| 176 | (define (ladspa-environment config) |
| 177 | ;; Define this variable in the global environment such that |
| 178 | ;; pulseaudio swh-plugins (and similar LADSPA plugins) work. |
| 179 | `(("LADSPA_PATH" . |
| 180 | (string-join |
| 181 | ',(map (lambda (package) (file-append package "/lib/ladspa")) |
| 182 | (ladspa-plugins config)) |
| 183 | ":")))) |
| 184 | |
| 185 | (define ladspa-service-type |
| 186 | (service-type |
| 187 | (name 'ladspa) |
| 188 | (extensions |
| 189 | (list (service-extension session-environment-service-type |
| 190 | ladspa-environment))) |
| 191 | (default-value (ladspa-configuration)) |
| 192 | (description "Configure LADSPA plugins."))) |
| 193 | |
| 194 | ;;; sound.scm ends here |