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-;;; emms-volume-pulse.el --- a mode for changing volume using PulseAudio pactl
-
-;; Copyright (C) 2015 Free Software Foundation, Inc.
-
-;; Author: Rasmus Pank Roulund <emacs@pank.eu>
-
-;; This file is part of EMMS.
-
-;; EMMS 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, or (at your option)
-;; any later version.
-;;
-;; EMMS 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 EMMS; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
-
-;;; Commentary:
-
-;; This file defines a few simple functions to raise or lower the volume
-;; using pactl. It can be used stand-alone, though it's meant for usage
-;; with EMMS, particularly with emms-volume.el.
-;;
-;; To use add the following to your EMMS configuration
-;; (setq emms-volume-change-function 'emms-volume-pulse-change)
-
-;;; History:
-
-;; Marts 2015: First release. Partly based on emms-volume-amixer.el
-
-;;; Todo:
-
-;; There probably needs to be more configurability, which may in turn
-;; mean adding some more functions.
-;; Some of this could benefit from adding customize interfaces.
-
-;;; Code:
-
-(require 'cl-lib)
-
-;; TODO: it would be great if custom could have
-;; choices based on pactl list short sinks | cut -f1-2
-
-(defcustom emms-volume-pulse-sink 0
- "The sink to use for volume adjustment.
-
-See full list of devices on your system by running
- pactl list short sinks"
- :type '(choice (number :tag "Sink number")
- (string :tag "Sink symbolic name"))
- :group 'emms-volume)
-
-(defcustom emms-volume-pulse-max-volume 100
- "The maximum volume percentage."
- :type 'integer
- :group 'emms-volume)
-
-
-(defun emms-volume--pulse-get-volume ()
- "Return `emms-volume-pulse-sink' volume."
- (let ((sink-number-p (numberp emms-volume-pulse-sink))
- (start 0)
- (output
- (shell-command-to-string
- (concat "pactl list sinks" "|"
- "grep -E -e 'Sink' -e 'Name' -e '^[^a-zA-Z]*Volume'"))))
- (string-to-number
- (car
- (reverse
- (funcall
- (if sink-number-p 'assq 'assoc)
- emms-volume-pulse-sink
- (mapcar (if sink-number-p 'identity 'cdr)
- (cl-loop while
- (string-match
- (mapconcat 'identity
- '(".*Sink[ \t]+\\#\\([0-9]+\\)"
- ".*Name:[ \t]\\([^\n]+\\)"
- ".*Volume:.*?\\([0-9]+\\)%.*\n?")
- "\n")
- output)
- collect (list (string-to-number (match-string 1 output))
- (match-string 2 output)
- (match-string 3 output))
- do (setq output (replace-match "" nil nil output))))))))))
-
-
-;;;###autoload
-(defun emms-volume-pulse-change (amount)
- "Change PulseAudio volume by AMOUNT."
- (message "Volume is %s%%"
- (let ((pactl (or (executable-find "pactl")
- (error "pactl is not in PATH")))
- (next-vol (max (min (+ (emms-volume--pulse-get-volume) amount)
- emms-volume-pulse-max-volume)
- 0)))
- (when (zerop (shell-command
- (format "%s set-sink-volume %s %s%%"
- pactl emms-volume-pulse-sink next-vol)))
- next-vol))))
-
-(provide 'emms-volume-pulse)
-
-;;; emms-volume-pulse.el ends here