unofficial mirror of guix-patches@gnu.org 
 help / color / mirror / code / Atom feed
blob 94d8bc74827b8937232272981f7b881c2bf368bf 8413 bytes (raw)
name: gnu/home/services/sound.scm 	 # note: path name is non-authoritative(*)

  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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2023 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2023 Brian Cully <bjc@spork.org>
;;;
;;; 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 home services sound)
  #:use-module (gnu home services)
  #:use-module (gnu home services shepherd)
  #:use-module (gnu packages linux)
  #:use-module (gnu services configuration)
  #:use-module (guix records)
  #:use-module (guix gexp)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match)
  #:export (home-pulseaudio-rtp-sink-service-type
            home-pulseaudio-rtp-source-service-type
            %pulseaudio-rtp-multicast-address

            home-pipewire-configuration
            home-pipewire-service-type))

\f
;;;
;;; PipeWire support.
;;;
(define-configuration/no-serialization home-pipewire-configuration
  (pipewire (file-like pipewire) "The PipeWire package to use.")
  (wireplumber (file-like wireplumber) "The WirePlumber package to use.")
  (enable-pulseaudio? (boolean #t) "Enable PulseAudio replacement."))

(define (home-pipewire-shepherd-service config)
  (shepherd-service
   (documentation "PipeWire screen and audio sharing.")
   (provision '(pipewire))
   (requirement '(dbus))
   (start #~(make-forkexec-constructor
             (list #$(file-append
                      (home-pipewire-configuration-pipewire config)
                      "/bin/pipewire"))))))

(define (home-pipewire-pulseaudio-shepherd-service config)
  (shepherd-service
   (documentation "Drop-in PulseAudio replacement service for PipeWire.")
   (provision '(pipewire-pulseaudio))
   (requirement '(pipewire))
   (start #~(make-forkexec-constructor
             (list #$(file-append
                      (home-pipewire-configuration-pipewire config)
                      "/bin/pipewire-pulse"))))))

(define (home-wireplumber-shepherd-service config)
  (shepherd-service
   (documentation "WirePlumber session management for PipeWire.")
   (provision '(wireplumber))
   (requirement '(pipewire))
   (start #~(make-forkexec-constructor
             (list #$(file-append
                      (home-pipewire-configuration-wireplumber config)
                      "/bin/wireplumber"))))))

(define (home-pipewire-shepherd-services config)
  (define shepherd-services
    (filter
     identity
     (list home-pipewire-shepherd-service home-wireplumber-shepherd-service
           (and (home-pipewire-configuration-enable-pulseaudio? config)
                home-pipewire-pulseaudio-shepherd-service))))
  (map (cut <> config) shepherd-services))

(define home-pipewire-service-type
  (service-type
   (name 'pipewire)
   (extensions
    (list (service-extension home-shepherd-service-type
                             home-pipewire-shepherd-services)))
   (description
    "Start essential PipeWire services.")
   (default-value (home-pipewire-configuration))))

\f
;;;
;;; PulseAudio support.
;;;

(define (with-pulseaudio-connection sock exp)
  ;; Wrap EXP in an expression where SOCK is bound to a socket connected to
  ;; the user's PulseAudio command-line interface socket.
  #~(let* ((#$sock (socket AF_UNIX SOCK_STREAM 0))
           (pulse-user-file
            (lambda (name)
              (string-append "/run/user/" (number->string (getuid))
                             "/pulse/" name)))
           (file (pulse-user-file "cli")))
      (let loop ((tries 0))
        (catch #t
          (lambda ()
            (connect #$sock AF_UNIX file)
            (let ((result #$exp))
              (close-port #$sock)
              result))
          (lambda (key . args)
            (if (and (eq? key 'system-error)
                     (= ENOENT (system-error-errno (cons key args)))
                     (< tries 3))
                ;; The CLI socket doesn't exist yet, so send pulseaudio
                ;; SIGUSR2 so that it creates it and listens to it.
                (let ((pid (call-with-input-file (pulse-user-file "pid")
                             read)))
                  (when (and (integer? pid) (> pid 1))
                    (kill pid SIGUSR2))
                  ((@ (fibers) sleep) 1)
                  (loop (+ tries 1)))
                (begin
                  (close-port #$sock)
                  (apply throw key args))))))))

(define %pulseaudio-rtp-multicast-address
  ;; Default address used by 'module-rtp-sink' and 'module-rtp-recv'.  This is
  ;; a multicast address, for the Session Announcement Protocol (SAP) and the
  ;; Session Description Protocol (SDP).
  "224.0.0.56")

(define (pulseaudio-rtp-sink-shepherd-services destination-ip)
  (list (shepherd-service
         (provision '(pulseaudio-rtp-sink))
         (start
          #~(lambda* (#:optional (destination-ip #$destination-ip))
              #$(with-pulseaudio-connection
                 #~sock
                 #~(begin
                     (display "\
load-module module-null-sink \
sink_name=rtp sink_properties=\"device.description='RTP network output'\"\n"
                              sock)
                     (display (string-append "\
load-module module-rtp-send source=rtp.monitor"
                                             (if destination-ip
                                                 (string-append
                                                  " destination_ip="
                                                  destination-ip)
                                                 "")
                                             "\n")
                              sock)
                     #t))))
         (stop
          #~(lambda (_)
              #$(with-pulseaudio-connection
                 #~sock
                 #~(begin
                     (display "unload-module module-rtp-send\n"
                              sock)
                     (display "unload-module module-null-sink\n"
                              sock)
                     #f))))
         (auto-start? #f))))

(define home-pulseaudio-rtp-sink-service-type
  (service-type
   (name 'pulseaudio-rtp-sink)
   (extensions
    (list (service-extension home-shepherd-service-type
                             pulseaudio-rtp-sink-shepherd-services)))
   (description
    "Define a PulseAudio sink to broadcast audio output over RTP, which can
then by played by another PulseAudio instance.")

   ;; By default, send to the SAP multicast address, 224.0.0.56, which can be
   ;; network-intensive.
   (default-value %pulseaudio-rtp-multicast-address)))

(define (pulseaudio-rtp-source-shepherd-services source-ip)
  (list (shepherd-service
         (provision '(pulseaudio-rtp-source))
         (start
          #~(lambda* (#:optional (source-ip #$source-ip))
              #$(with-pulseaudio-connection
                 #~sock
                 #~(begin
                     (format sock "\
load-module module-rtp-recv sap_address=~a\n" source-ip)
                     #t))))
         (stop
          #~(lambda (_)
              #$(with-pulseaudio-connection
                 #~sock
                 #~(begin
                     (display "unload-module module-rtp-recv\n"
                              sock)
                     #f))))
         (auto-start? #f))))

(define home-pulseaudio-rtp-source-service-type
  (service-type
   (name 'pulseaudio-rtp-source)
   (extensions
    (list (service-extension home-shepherd-service-type
                             pulseaudio-rtp-source-shepherd-services)))
   (description
    "Define a PulseAudio source to receive audio broadcasted over RTP by
another PulseAudio instance.")
   (default-value %pulseaudio-rtp-multicast-address)))

\f
;;;
;;; Generate documentation.
;;;
(define (generate-doc)
  (configuration->documentation 'home-pipewire-configuration))

debug log:

solving 94d8bc7482 ...
found 94d8bc7482 in https://yhetil.org/guix-patches/13252a733171e18f4d39d0185ddf3e8e3c06bc15.1685747062.git.bjc@spork.org/
found 22c1a99250 in https://git.savannah.gnu.org/cgit/guix.git
preparing index
index prepared:
100644 22c1a992507782c7053d129e3cf33f49e396b7e3	gnu/home/services/sound.scm

applying [1/1] https://yhetil.org/guix-patches/13252a733171e18f4d39d0185ddf3e8e3c06bc15.1685747062.git.bjc@spork.org/
diff --git a/gnu/home/services/sound.scm b/gnu/home/services/sound.scm
index 22c1a99250..94d8bc7482 100644

Checking patch gnu/home/services/sound.scm...
Applied patch gnu/home/services/sound.scm cleanly.

index at:
100644 94d8bc74827b8937232272981f7b881c2bf368bf	gnu/home/services/sound.scm

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).