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-;;; emms-volume.el --- Volume functions and a minor mode to adjust volume easily  -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2006-2023  Free Software Foundation, Inc.
-
-;; Author: Martin Schoenmakers <[email protected]>
-;;         Bruno Félix Rezende Ribeiro <[email protected]>
-
-;; 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 provides generally two things:
-;; Generic volume setting functions and some appropriate bindings for EMMS
-;; playlist buffers. These can also be bound to global keys,however, the
-;; second part may be more useful for this. This part provides functions
-;; meant to be bound to a global key (the author uses C-c e + and C-c e -),
-;; which then temporarily activates a minor mode allowing you to change the
-;; volume with just + and -. This mode deactivates a short (configurable)
-;; amount of time after the last volume change. This allows for easier volume
-;; adjustment without getting in the way.
-
-;;; History:
-
-;; May 2006: First stab at writing the minor mode.
-;;
-;; 30 May 2006: Cleanup and restructuring to fit with EMMS.
-
-;;; Todo:
-
-;; Some of this could benefit from adding customize interfaces.
-
-;;; Code:
-
-
-(require 'emms)
-(require 'emms-playlist-mode)
-(require 'emms-volume-amixer)
-(require 'emms-volume-pulse)
-(require 'emms-volume-mixerctl)
-(require 'emms-volume-sndioctl)
-
-;; Customize group
-(defgroup emms-volume nil
-  "Volume setting for EMMS."
-  :group 'emms)
-
-(defcustom emms-volume-change-function
-  (cond
-   ;; check for sndioctl first to avoid picking up mixerctl or pactl
-   ;; on OpenBSD.
-   ((executable-find "sndioctl") #'emms-volume-sndioctl-change)
-   ((executable-find "amixer") #'emms-volume-amixer-change)
-   ((executable-find "pactl") #'emms-volume-pulse-change)
-   ((executable-find "mixerctl") #'emms-volume-mixerctl-change)
-   (t #'(lambda (_amount) (user-error "%s" "No supported mixer found.  Please, define ‘emms-volume-change-function’."))))
-  "The function to use to change the volume.
-If you have your own functions for changing volume, set this."
-  :type '(choice (const :tag "Amixer" emms-volume-amixer-change)
-                 (const :tag "MPD" emms-volume-mpd-change)
-		 (const :tag "PulseAudio" emms-volume-pulse-change)
-		 (const :tag "Mixerctl" emms-volume-mixerctl-change)
-                 (const :tag "Sndioctl" emms-volume-sndioctl-change)
-                 (function :tag "Lisp function")))
-
-(defcustom emms-volume-change-amount 2
-  "The amount to use when raising or lowering the volume using the
-emms-volume interface.
-
-This should be a positive integer."
-  :type 'integer)
-
-(defun emms-volume-select-get-function ()
-  "Return the corresponding get function."
-  (cond ((not emms-volume-change-function)
-	 (error "`emms-volume-change-function' is not set"))
-	((eq emms-volume-change-function #'emms-volume-amixer-change)
-	 #'emms-volume-amixer-get)
-	((eq emms-volume-change-function #'emms-volume-pulse-change)
-	 #'emms-volume-pulse-get)
-	(t (error "could not find corresponding volume getter function for %s"
-		  emms-volume-change-function))))
-
-(defun emms-volume-get ()
-  "Return the volume as an integer in the range [0-100]."
-  (funcall (emms-volume-select-get-function)))
-
-;;;###autoload
-(defun emms-volume-raise ()
-  "Raise the volume."
-  (interactive)
-  (funcall emms-volume-change-function emms-volume-change-amount))
-
-;;;###autoload
-(defun emms-volume-lower ()
-  "Lower the volume."
-  (interactive)
-  (funcall emms-volume-change-function (- emms-volume-change-amount)))
-
-(define-key emms-playlist-mode-map (kbd "+") #'emms-volume-raise)
-(define-key emms-playlist-mode-map (kbd "-") #'emms-volume-lower)
-
-;; Code specific to the minor mode.
-(define-minor-mode emms-volume-minor-mode
-  "Allows volume setting with + and - after an initial key combo."
-  :global t
-  :init-value nil
-  :lighter " (+/-)"
-  :keymap '(("+" . emms-volume-mode-plus)
-            ("-" . emms-volume-mode-minus)))
-
-(defvar emms-volume-mode-timeout 2
-  "*The timeout in amount of seconds used by `emms-volume-minor-mode'.")
-
-(defvar emms-volume-mode-timer nil
-  "The timer `emms-volume-minor-mode' uses.")
-
-;;;###autoload
-(defun emms-volume-mode-plus ()
-  "Raise volume and enable or extend the `emms-volume-minor-mode' timeout."
-  (interactive)
-  (emms-volume-raise)
-  (emms-volume-mode-start-or-extend))
-
-;;;###autoload
-(defun emms-volume-mode-minus ()
-  "Lower volume and enable or extend the `emms-volume-minor-mode' timeout."
-  (interactive)
-  (emms-volume-lower)
-  (emms-volume-mode-start-or-extend))
-
-(defun emms-volume-mode-disable-timer ()
-  "Disable `emms-volume-minor-mode' timer."
-  (cancel-timer emms-volume-mode-timer)
-  (setq emms-volume-mode-timer nil))
-
-(defun emms-volume-mode-set-timer ()
-  "Set a new `emms-volume-minor-mode' timer."
-  (when emms-volume-mode-timer
-    (emms-volume-mode-disable-timer))
-  (setq emms-volume-mode-timer (run-at-time emms-volume-mode-timeout
-                                            nil
-                                            #'emms-volume-mode-timer-timeout)))
-
-(defun emms-volume-mode-timer-timeout ()
-  "Function to disable `emms-volume-minor-mode' at timeout."
-  (setq emms-volume-mode-timer nil)
-  (emms-volume-minor-mode -1))
-
-(defun emms-volume-mode-start-or-extend ()
-  "Start `emms-volume-minor-mode' or extend its running time."
-  (when (null emms-volume-minor-mode)
-    (emms-volume-minor-mode 1))
-  (emms-volume-mode-set-timer))
-
-(provide 'emms-volume)
-;;; emms-volume.el ends here