;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2018, 2020 Oleg Pykhalov ;;; Copyright © 2020 Liliana Marie Prikler ;;; Copyright © 2020 Marius Bakke ;;; Copyright © 2022 Maxim Cournoyer ;;; ;;; 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 . (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 diagnostics) #:use-module (guix gexp) #:use-module (guix packages) #:use-module (guix records) #:use-module (guix store) #:use-module (guix ui) #:use-module (gnu packages audio) #:use-module (gnu packages linux) #:use-module (gnu packages pulseaudio) #:use-module (ice-9 match) #:use-module (srfi srfi-1) #:export (alsa-configuration alsa-configuration? alsa-configuration-alsa-plugins alsa-configuration-pulseaudio? alsa-configuration-extra-options alsa-service-type pulseaudio-configuration pulseaudio-configuration? pulseaudio-configuration-client-conf pulseaudio-configuration-daemon-conf pulseaudio-configuration-script-file pulseaudio-configuration-extra-script-files pulseaudio-configuration-system-script-file pulseaudio-service-type ladspa-configuration ladspa-configuration? ladspa-configuration-plugins ladspa-service-type)) ;;; Commentary: ;;; ;;; Sound services. ;;; ;;; Code: ;;; ;;; ALSA ;;; (define-record-type* 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-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 make-pulseaudio-configuration pulseaudio-configuration? (client-conf pulseaudio-configuration-client-conf (default '())) (daemon-conf pulseaudio-configuration-daemon-conf ;; Flat volumes may cause unpleasant experiences to users ;; when applications inadvertently max out the system volume ;; (see e.g. ). (default '((flat-volumes . no)))) (script-file pulseaudio-configuration-script-file (default #~(string-append #$pulseaudio:daemon "/etc/pulse/default.pa"))) (extra-script-files pulseaudio-configuration-extra-script-files (default '())) (system-script-file pulseaudio-configuration-system-script-file (default #~(string-append #$pulseaudio:daemon "/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 (($ client-conf daemon-conf default-script-file) ;; These config files kept at a fixed location, so that the following ;; environment values are stable and do not require the user to reboot to ;; effect their PulseAudio configuration changes. '(("PULSE_CONFIG" . "/etc/pulse/daemon.conf") ("PULSE_CLIENTCONFIG" . "/etc/pulse/client.conf"))))) (define (extra-script-files->file-union extra-script-files) "Return a G-exp obtained by processing EXTRA-SCRIPT-FILES with FILE-UNION." (define (file-like->name file) (match file ((? local-file?) (local-file-name file)) ((? plain-file?) (plain-file-name file)) ((? computed-file?) (computed-file-name file)) (_ (leave (G_ "~a is not a local-file, plain-file or \ computed-file object~%") file)))) (define (assert-pulseaudio-script-file-name name) (unless (string-suffix? ".pa" name) (leave (G_ "`~a' lacks the required `.pa' file name extension~%") name)) name) (let ((labels (map (compose assert-pulseaudio-script-file-name file-like->name) extra-script-files))) (file-union "default.pa.d" (zip labels extra-script-files)))) (define (append-include-directive script-file) "Append an include directive to source scripts under /etc/pulse/default.pa.d." (computed-file "default.pa" #~(begin (use-modules (ice-9 textual-ports)) (define script-text (call-with-input-file #$script-file get-string-all)) (call-with-output-file #$output (lambda (port) (format port (string-append script-text " ### Added by Guix to include scripts specified in extra-script-files. .nofail .include /etc/pulse/default.pa.d~%"))))))) (define pulseaudio-etc (match-lambda (($ client-conf daemon-conf default-script-file extra-script-files system-script-file) `(("pulse" ,(file-union "pulse" `(("default.pa" ,(if (null? extra-script-files) default-script-file (append-include-directive default-script-file))) ("system.pa" ,system-script-file) ,@(if (null? extra-script-files) '() `(("default.pa.d" ,(extra-script-files->file-union extra-script-files)))) ("daemon.conf" ,(apply mixed-text-file "daemon.conf" "default-script-file = /etc/pulse/default.pa\n" (map pulseaudio-conf-entry daemon-conf))) ("client.conf" ,(apply mixed-text-file "client.conf" (map pulseaudio-conf-entry client-conf)))))))))) (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 `(,pulseaudio "daemon"))))) (default-value (pulseaudio-configuration)) (description "Configure PulseAudio sound support."))) ;;; ;;; LADSPA ;;; (define-record-type* ladspa-configuration make-ladspa-configuration ladspa-configuration? (plugins ladspa-configuration-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-configuration-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