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Cache default nodes 

This makes a significant difference in CPU usage when e.g. displaying
the defaults in a panel.
This commit is contained in:
Milan Zamazal 2022-06-25 07:11:20 +02:00
parent 9ca7a06af6
commit b80fbab73a
1 changed files with 14 additions and 9 deletions
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23
pw-lib.el
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@ -31,11 +31,13 @@
(defvar pw-lib--objects '())
(defvar pw-lib--bindings nil)
(defvar pw-lib--defaults nil)
(defun pw-lib-refresh ()
"Clear cache of objects retrieved from PipeWire."
(setq pw-lib--objects (pw-access-objects pw-lib--accessor)
pw-lib--bindings nil))
pw-lib--bindings nil
pw-lib--defaults nil))
(defun pw-lib-objects (&optional type)
"Return a list of PipeWire objects.
@ -136,14 +138,17 @@ 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))))
(unless pw-lib--defaults
(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"))))
(setq pw-lib--defaults
(cl-remove-if-not #'cdr
(mapcar #'(lambda (d)
(cons (car d) (cdr (assoc (cdr d) nodes))))
defaults)))))
pw-lib--defaults)
(defun pw-lib--default-node (key)
(pw-lib-get-object (cdr (assoc key (pw-lib-default-nodes)))))