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GNU GENERAL PUBLIC LICENSE
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;;; pw-access.el --- PipeWire access -*- lexical-binding: t -*-
;; Copyright (C) 2022 Milan Zamazal <pdm@zamazal.org>
;; COPYRIGHT NOTICE
;;
;; This program 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.
;;
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;; A generic interface for communication with PipeWire (https://pipewire.org).
;; It abstracts communication with PipeWire to be backend independent.
;; Only functions from this module may communicate with PipeWire.
;;
;; Currently, pw-cli is used to talk to PipeWire. This is not optimal
;; because pw-cli doesn't seem to have documented output format and
;; the format changes accross PipeWire versions. But there seem to be
;; no better options currently. This module should allow switching to
;; other communication means easily, without any changes needed
;; outside this module, except for using a different communication
;; class.
(require 'eieio)
(defclass pw-accessor ()
()
:documentation
"Base PipeWire interface class.
All PipeWire interfaces should derive from this class.")
(cl-defgeneric pw-access-objects (class)
"Return all the objects currently reported by PipeWire.
It is a list of object data. Each of the elements has a form
(OBJECT-ID . INFO) where OBJECT-ID is a numeric OBJECT-ID as
reported by PipeWire and INFO is an association list of items
(NAME . VALUE) where NAME is a string item name as reported by
PipeWire and VALUE is the corresponding value. VALUE is a number for
object ids, a string otherwise.
A special entry with `type' symbol as its name contains the PipeWire
type of the objects, as a string (e.g. \"Device\", \"Node\", \"Port\",
\"Client\", ...).")
(cl-defgeneric pw-access-properties (class node-id)
"Return properties of the given node.
NODE-ID is a numeric PipeWire Node id (other kinds of PipeWire objects
are not supported in this method).
Object properties may be, unlike object info items, settable.
An assocation list is returned. Each list element is of the form
(PROPERTY . VALUE) where PROPERTY is a string name of the given
property. VALUE can be:
- \"true\" or \"false\" for boolean values (t and nil are not used to
avoid confusion with nil representing invalid or unavailable value).
- A number for numeric values (ids, integers, floats).
- A string for string values.
- A list of elements of any of these types for arrays and structs.")
(cl-defgeneric pw-access-set-properties (class node-id properties)
"Set PROPERTIES of the given node.
NODE-ID is a numeric PipeWire Node id (other kinds of PipeWire objects
are not supported in this method).
PROPERTIES is an association list in the same format as in
`pw-access-properties'. It needn't contain all the properties, just
the properties to be changed.")
(cl-defgeneric pw-access-defaults (class)
"Return default sinks and sources.
An association lists is returned. Each list element is of the form
(KEY . NAME) where KEY is a string identifying the given kind of
default sink or source as reported by PipeWire and NAME is a string
name of the node assigned to the default.")
(cl-defgeneric pw-access-set-default (class key node-name)
"Set default sink or source.
KEY is a string identifying the given kind of default sink or source
as reported in `pw-access-defaults' and NODE-NAME is a string name of
the node that should be assigned to KEY.")
;; pw-cli interface
(defvar pw-cli-command "pw-cli"
"pw-cli command to use.")
(defvar pw-cli-metadata-command "pw-metadata"
"pw-metadata command to use.")
(defclass pw-cli-accessor (pw-accessor)
()
:documentation
"pw-cli based interface to PipeWire.
Note this interface may not work with all PipeWire versions.")
(defun pw-cli--command (command args)
(apply #'call-process command nil t nil args)
(goto-char (point-min)))
(defun pw-cli--next-line ()
(goto-char (line-beginning-position 2)))
(defun pw-cli--parse-list ()
(let ((objects '()))
(while (re-search-forward "^[\t]id \\([0-9]+\\), type PipeWire:Interface:\\(.*\\)/.*$" nil t)
(let ((id (string-to-number (match-string 1)))
(properties `((type . ,(match-string 2)))))
(pw-cli--next-line)
(while (looking-at "^ [\t][\t]\\([a-z.]+\\) = \"\\(.*\\)\"")
(let ((property (match-string 1))
(value (match-string 2)))
(when (string-suffix-p ".id" property)
(setq value (string-to-number value)))
(push (cons property value) properties))
(pw-cli--next-line))
(push (cons id properties) objects)))
(nreverse objects)))
(cl-defmethod pw-access-objects ((class pw-cli-accessor))
(with-temp-buffer
(pw-cli--command pw-cli-command '("list-objects"))
(pw-cli--parse-list)))
(defun pw-cli--read-property (&optional nesting)
(unless nesting
(setq nesting 0))
(when (looking-at (concat (make-string (+ 6 (* 2 nesting)) ? )
"\\([A-Za-z:]+\\) \\(.*\\)"))
(let ((type (match-string 1))
(value (match-string 2)))
(pcase type
("Bool"
(if (equal value "true") 'true 'false))
((or "Float" "Id" "Int")
(string-to-number value))
("String"
(substring value 1 -1))
((or "Array:" "Struct:")
(let ((array '())
item)
(pw-cli--next-line)
(while (setq item (pw-cli--read-property (1+ nesting)))
(push item array)
(pw-cli--next-line))
(nreverse array)))))))
(defun pw-cli--parse-properties ()
(pw-cli--next-line)
(let ((end (save-excursion
(or (and (re-search-forward "^ Object:" nil t)
(point))
(point-max))))
(properties '()))
(while (re-search-forward "^ Prop: key \\([A-Za-z:]+\\)" end t)
(pw-cli--next-line)
(let ((property (car (last (split-string (match-string 1) ":"))))
(value (pw-cli--read-property)))
(when value
(push (cons property value) properties))))
properties))
(cl-defmethod pw-access-properties ((class pw-cli-accessor) node-id)
(with-temp-buffer
(pw-cli--command pw-cli-command `("enum-params" ,(number-to-string node-id) "Props"))
(pw-cli--parse-properties)))
(defun pw-cli--format-property-value (value)
(if (consp value)
(concat "[ " (mapconcat #'pw-cli--format-property-value value ", ") " ]")
value))
(defun pw-cli--format-property (property)
(format "%s: %s" (car property) (pw-cli--format-property-value (cdr property))))
(cl-defmethod pw-access-set-properties ((class pw-cli-accessor) node-id properties)
(let* ((formatted (mapconcat #'pw-cli--format-property properties ", "))
(props (concat "{ " formatted " }")))
(call-process pw-cli-command nil pw-cli-command nil
"set-param" (number-to-string node-id) "Props" props)))
(defun pw-cli--parse-metadata ()
(let ((metadata '()))
(while (re-search-forward
"key:'\\([a-z.]+\\)'.*\\(value\\|\"name\"\\): ?['\"]\\([^'\"]+\\)['\"]"
nil t)
(push (cons (match-string 1) (match-string 3)) metadata))
metadata))
(cl-defmethod pw-access-defaults ((class pw-cli-accessor))
(with-temp-buffer
(pw-cli--command pw-cli-metadata-command '("0"))
(pw-cli--parse-metadata)))
(cl-defmethod pw-access-set-default ((class pw-cli-accessor) property node-name)
(call-process pw-cli-metadata-command nil pw-cli-metadata-command nil
"0" property (format "{ \"name\": \"%s\" }" node-name)))
(provide 'pw-access)

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;;; pw-lib.el --- PipeWire library -*- lexical-binding: t -*-
;; Copyright (C) 2022 Milan Zamazal <pdm@zamazal.org>
;; COPYRIGHT NOTICE
;;
;; This program 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.
;;
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;; Backend-independent library to access PipeWire functionality.
;; It abstracts data returned from `pw-access' methods and provides
;; functions to work with them.
;;
;; pw-lib caches data retrieved from PipeWire and uses the cached
;; data. If The cache can be invalidated by calling `pw-lib-refresh'.
(require 'cl-lib)
(require 'pw-access)
(defvar pw-lib--accessor (pw-cli-accessor))
(defvar pw-lib--objects '())
(defun pw-lib-refresh ()
"Clear cache of objects retrieved from PipeWire."
(setq pw-lib--objects (pw-access-objects pw-lib--accessor)))
(defun pw-lib-objects (&optional type)
"Return a list of PipeWire objects.
TYPE is a string identifying PipeWire objects types (e.g. \"Device\",
\"Node\", \"Port\", \"Client\", ...). If specified, return only
objects of the given type.
The format of the list elements is unspecified, use pw-lib functions
to access their data.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(unless pw-lib--objects
(pw-lib-refresh))
(let ((objects pw-lib--objects))
(when type
(setq objects (cl-remove-if-not
#'(lambda (o) (string= (cdr (assq 'type (cdr o))) type))
objects)))
objects))
(defun pw-lib-get-object (id)
"Return PipeWire object identified by ID.
If such an object doesn't exist, return nil.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(assoc id pw-lib--objects))
(defun pw-lib-object-id (object)
"Return id of the given PipeWire OBJECT."
(car object))
(defun pw-lib--object-info (object)
(cdr object))
(defun pw-lib-object-value (object key &optional default)
"Return PipeWire OBJECT value identified by KEY.
KEY is a string corresponding to a PipeWire value identifier.
If the given KEY doesn't exist in OBJECT, return DEFAULT."
(or (cdr (assoc key (pw-lib--object-info object)))
default))
(defun pw-lib-object-type (object)
"Return PipeWire type of OBJECT as a string.
E.g. \"Device\", \"Node\", \"Port\", \"Client\", ..."
(pw-lib-object-value object 'type))
(defun pw-lib--node (object)
(if (equal (pw-lib-object-type object) "Node")
object
(pw-lib-get-object (pw-lib-object-value object "node.id"))))
(defun pw-lib--node-parameters (object-or-id)
(let* ((object (if (numberp object-or-id)
(pw-lib-get-object object-or-id)
object-or-id))
(node (pw-lib--node object))
(parameters (pw-lib-object-value node 'parameters)))
(unless parameters
(setq parameters (pw-access-properties pw-lib--accessor (pw-lib-object-id node)))
(setcdr node (cons (cons 'parameters parameters)
(cdr node))))
parameters))
(defun pw-lib-default-nodes ()
"Return assignments of PipeWire Nodes to default sinks and sources.
An association lists with elements of the form (KEY . ID) is
returned, where KEY is a string identifying the given kind of
default sink or source as reported by PipeWire and ID is the
corresponding PipeWire node numeric id.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(let ((defaults (pw-access-defaults pw-lib--accessor))
(nodes (mapcar #'(lambda (o)
(cons (pw-lib-object-value o "node.name") (pw-lib-object-id o)))
(pw-lib-objects "Node"))))
(cl-remove-if-not #'cdr
(mapcar #'(lambda (d)
(cons (car d) (cdr (assoc (cdr d) nodes))))
defaults))))
(defun pw-lib-bindings ()
"Return bindings between PipeWire objects.
An association lists with elements of the form (PARENT . CHILD) is
returned where PARENT and CHILD are numeric ids of PipeWire objects.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(apply #'nconc (mapcar #'(lambda (o)
(let ((o-id (pw-lib-object-id o)))
(mapcar #'(lambda (p)
(cons o-id (cdr p)))
(cl-remove-if-not #'numberp (pw-lib--object-info o)
:key #'cdr))))
(pw-lib-objects))))
(defun pw-lib-children (id bindings &optional type)
"Return child objects of the object identified by numeric PipeWire ID.
BINDINGS are object bindings as returned from `pw-lib-bindings'.
If a string TYPE is specified then only children of the given PipeWire
type are returned.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(let ((children (mapcar #'pw-lib-get-object
(mapcar #'car (cl-remove-if #'(lambda (b) (/= (cdr b) id)) bindings)))))
(when type
(setq children (cl-remove-if-not #'(lambda (o) (equal (pw-lib-object-type o) type))
children)))
children))
(defun pw-lib-default-audio-sink ()
"Return a PipeWire object that is the current default audio sink."
(pw-lib-get-object (cdr (assoc "default.audio.sink" (pw-lib-default-nodes)))))
(defun pw-lib--volume-% (volume)
(when volume
(round (* 100 volume))))
(defun pw-lib--volume-float (volume)
(/ (float volume) 100))
(defun pw-lib--object-parameters (object)
(let* ((node-p (equal (pw-lib-object-type object) "Node"))
(parameters (pw-lib--node-parameters object))
(monitor-p (unless node-p
(equal (pw-lib-object-value object "port.monitor") "true")))
(node-id (pw-lib-object-id (pw-lib--node object)))
(port-id (unless node-p
(pw-lib-object-value object "port.id"))))
(list node-p parameters monitor-p node-id port-id)))
(defun pw-lib-muted-p (object)
"Return whether the given PipeWire object is muted.
Applicable only to Nodes and Ports.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(cl-destructuring-bind (node-p parameters monitor-p node-id port-id)
(pw-lib--object-parameters object)
(eq (cdr (assoc (if monitor-p "monitorMute" "mute") parameters)) 'true)))
(defun pw-lib-toggle-mute (object)
"Toggle mute status of the given PipeWire OBJECT.
Return the new boolean mute status of OBJECT.
Applicable only to Nodes and Ports.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(cl-destructuring-bind (node-p parameters monitor-p node-id port-id)
(pw-lib--object-parameters object)
(let* ((mute (not (pw-lib-muted-p object)))
(property (if monitor-p "monitorMute" "mute"))
(value (if mute "true" "false")))
(pw-access-set-properties pw-lib--accessor node-id (list (cons property value)))
mute)))
(defun pw-lib-volume (object)
"Return volume of the given PipeWire object.
The returned value is an integer in the range 0-100.
Applicable only to Nodes and Ports.
Note that PipeWire data is cached, if you need its up-to-date
version, call `pw-lib-refresh' first."
(cl-destructuring-bind (node-p parameters monitor-p node-id port-id)
(pw-lib--object-parameters object)
(pw-lib--volume-%
(if node-p
(cdr (assoc "volume" parameters))
(nth port-id (cdr (assoc (if monitor-p "monitorVolumes" "channelVolumes") parameters)))))))
(defun pw-lib-set-volume (volume object)
"Set the volume of PipeWire OBJECT to VOLUME.
VOLUME must be an integer in the range 0-100."
(cl-destructuring-bind (node-p parameters monitor-p node-id port-id)
(pw-lib--object-parameters object)
(let* ((property (cond
(node-p "volume")
(monitor-p "monitorVolumes")
(t "channelVolumes")))
(float-volume (pw-lib--volume-float volume))
(value (if node-p
float-volume
(let ((orig-value (cdr (assoc property parameters))))
(cl-substitute float-volume nil orig-value
:test #'always :start port-id :count 1)))))
(pw-access-set-properties pw-lib--accessor node-id (list (cons property value))))))
(defun pw-lib-set-default (object stored-p)
"Set PipeWire OBJECT as the default sink or source.
If STORED-P is non-nil, set the stored default sink or source,
otherwise set the current default sink or source."
(let ((suffix (mapconcat #'downcase
(split-string (pw-lib-object-value object "media.class") "/")
"."))
(prefix (if stored-p "default.configured." "default."))
(node-name (pw-lib-object-value object "node.name")))
(pw-access-set-default pw-lib--accessor (concat prefix suffix) node-name)))
(provide 'pw-lib)

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;;; pw-ui.el --- PipeWire user interface -*- lexical-binding: t -*-
;; Copyright (C) 2022 Milan Zamazal <pdm@zamazal.org>
;; COPYRIGHT NOTICE
;;
;; This program 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.
;;
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;; PipeWire user interface based on pw-lib.
;; An interactive buffer can be displayed using `M-x pipewire'.
;; `pipewire-increase-volume', `pipewire-decrease-volume' and
;; `pipewire-toggle-muted' functions are also suitable to bind on the
;; multimedia keys.
(require 'pw-lib)
(defgroup pipewire ()
"PipeWire user interface.")
(defcustom pipewire-volume-step 5
"How many percent points to add or subtract when changing volumes."
:type 'number
:group 'pipewire)
(defface pipewire-label-face
'((t (:weight bold :overline t)))
"Face to use for PipeWire node group labels."
:group 'pipewire)
(defface pipewire-default-object-face
'((t (:weight bold)))
"Face to use for PipeWire default sinks and sources."
:group 'pipewire)
(defface pipewire-muted-face
'((t (:strike-through t)))
"Face to use for muted PipeWire sinks and sources."
:group 'pipewire)
(defface pipewire-volume-face
'((t (:inverse-video t)))
"Face to use for displaying volumes of PipeWire objects."
:group 'pipewire)
(defvar pipewire-buffer "*PipeWire*")
(defun pw-ui--label (label)
(propertize (concat label ":") 'face 'pipewire-label-face))
(defun pw-ui--object-volume (object)
(propertize (pw-lib-volume object) 'face 'pipewire-volume-face))
(defun pw-ui--object-name (object)
(let* ((type (pw-lib-object-type object))
(description-properties (if (equal type "Client")
'("application.name")
(let ((prefix (concat (downcase type) ".")))
(mapcar #'(lambda (suffix) (concat prefix suffix))
'("description" "name"))))))
(or (cl-find-if #'identity
(mapcar #'(lambda (p) (pw-lib-object-value object p))
description-properties))
"")))
(defun pw-ui--object-label (object default-ids)
(let* ((id (pw-lib-object-id object))
(type (pw-lib-object-type object))
(text (format "%4s: %s" id (pw-ui--object-name object)))
(face (if (member id default-ids) 'pipewire-default-object-face 'default))
(media-class (pw-lib-object-value object "media.class")))
(when media-class
(setq text (format "%s (%s)" text media-class)))
(let ((volume-p (member type '("Node" "Port"))))
(when (and volume-p (pw-lib-muted-p object))
(setq face `(:inherit (pipewire-muted-face ,face))))
(let ((label (propertize text 'face face)))
(when volume-p
(let ((volume (pw-lib-volume object)))
(when volume
(setq label (concat label " "
(propertize (number-to-string volume)
'face 'pipewire-volume-face))))))
label))))
(defun pw-ui--insert-line (line object)
(insert (propertize line 'pw-object-id (pw-lib-object-id object)) "\n"))
(defun pipewire-refresh (&optional ignore-auto noconfirm)
"Refresh PipeWire buffer."
(interactive)
(when (and (not (eq major-mode 'pipewire-mode))
(not (equal (buffer-name) pipewire-buffer)))
(error "Not in a PipeWire buffer"))
(pw-lib-refresh)
(let ((inhibit-read-only t)
(bindings (pw-lib-bindings))
(default-ids (mapcar #'cdr (pw-lib-default-nodes)))
(current-line (count-lines (point-min) (min (1+ (point)) (point-max)))))
(erase-buffer)
(insert (pw-ui--label "Devices") "\n")
(dolist (device (pw-lib-objects "Device"))
(pw-ui--insert-line (pw-ui--object-label device default-ids) device)
(dolist (node (pw-lib-children (pw-lib-object-id device) bindings "Node"))
(pw-ui--insert-line (concat " " (pw-ui--object-label node default-ids)) node)
(dolist (port (pw-lib-children (pw-lib-object-id node) bindings "Port"))
(pw-ui--insert-line (concat " " (pw-ui--object-label port default-ids)) port))))
(insert (pw-ui--label "Clients") "\n")
(dolist (client (pw-lib-objects "Client"))
(pw-ui--insert-line (pw-ui--object-label client default-ids) client))
(goto-char (point-min))
(forward-line (1- current-line))))
(defun pw-ui--update (&optional message)
(when (get-buffer pipewire-buffer)
(with-current-buffer pipewire-buffer
(pipewire-refresh)))
(when message
(message message)))
(defun pw-ui--current-object (&optional use-default-p allowed-types)
(let* ((id (get-text-property (point) 'pw-object-id))
(object (when id (pw-lib-get-object id))))
(when (and object
(not (null allowed-types))
(not (member (pw-lib-object-type object) allowed-types)))
(setq object nil))
(when (and use-default-p (not object))
(setq object (pw-lib-default-audio-sink)))
object))
;;;###autoload
(defun pipewire-toggle-muted ()
"Switch mute status of an audio output or input.
If on a Node or Port in a PipeWire buffer, apply it on the given
object. Otherwise apply it on the default audio sink."
(interactive)
(let* ((object (pw-ui--current-object t '("Node" "Port")))
(muted-p (pw-lib-toggle-mute object)))
(pw-ui--update (format "%s %s" (pw-ui--object-name object) (if muted-p "muted" "unmuted")))))
;;;###autoload
(defun pipewire-set-volume (volume &optional object)
"Set volume of an audio output or input.
VOLUME must be a number in the range 0-100.
If OBJECT is given (only Nodes and Ports are allowed) or if on a Node
or Port in a PipeWire buffer, apply it on the given object.
Otherwise apply it on the default audio sink."
(interactive "nVolume: ")
(setq volume (max 0 (min 100 volume)))
(unless object
(setq object (pw-ui--current-object t '("Node" "Port"))))
(pw-lib-set-volume volume object)
(pw-ui--update (format "Volume %s for %s" volume (pw-ui--object-name object))))
(defun pw-ui--change-volume (step)
(let* ((object (pw-ui--current-object t '("Node" "Port")))
(volume (pw-lib-volume object))
(new-volume (max 0 (min 100 (+ volume step)))))
(pipewire-set-volume new-volume object)))
;;;###autoload
(defun pipewire-increase-volume ()
"Increase volume of an audio output or input.
The volume is increased by `pipewire-volume-step'.
If on a Node or Port in a PipeWire buffer, apply it on the given
object. Otherwise apply it on the default audio sink."
(interactive)
(pw-ui--change-volume pipewire-volume-step))
;;;###autoload
(defun pipewire-decrease-volume ()
"Decrease volume of an audio output or input.
The volume is Decreased by `pipewire-volume-step'.
If on a Node or Port in a PipeWire buffer, apply it on the given
object. Otherwise apply it on the default audio sink."
(interactive)
(pw-ui--change-volume (- pipewire-volume-step)))
;;;###autoload
(defun pipewire-set-default ()
"Set default sink or source.
If on a Node in a PipeWire buffer, apply it on the given object.
Otherwise ask for the Node to set as the default Node."
(interactive)
(let ((object (or (pw-ui--current-object nil '("Node"))
(let* ((default-node-ids (mapcar #'cdr (pw-lib-default-nodes)))
(nodes (cl-remove-if
#'(lambda (n) (member (pw-lib-object-id n) default-node-ids))
(pw-lib-objects "Node")))
(node-mapping (mapcar #'(lambda (n) (cons (pw-ui--object-name n)
(pw-lib-object-id n)))
nodes))
(node-name (completing-read "Default node: " node-mapping nil t)))
(pw-lib-get-object (cdr (assoc node-name node-mapping)))))))
(pw-lib-set-default object nil)
(pw-lib-set-default object t)
(pw-ui--update)))
(defvar pipewire-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "d" 'pipewire-set-default)
(define-key map "m" 'pipewire-toggle-muted)
(define-key map "v" 'pipewire-set-volume)
(define-key map "+" 'pipewire-increase-volume)
(define-key map "=" 'pipewire-increase-volume)
(define-key map "-" 'pipewire-decrease-volume)
map))
(define-derived-mode pipewire-mode special-mode "PW"
"Major mode for PipeWire user interface.
Selected PipeWire objects are displayed and basic operations may be
applied on some of them or the buffer:
\\{pipewire-mode-map}"
(set (make-local-variable 'revert-buffer-function)
'pipewire-refresh))
;;;###autoload
(defun pipewire ()
"Display a PipeWire buffer."
(interactive)
(switch-to-buffer pipewire-buffer)
(pipewire-refresh)
(pipewire-mode))
(provide 'pw-ui)