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-;;; emms-volume-mixerctl.el --- a mode for changing volume using mixerctl
-
-;; Copyright (C) 2006, 2007, 2008, 2009, 2019 Free Software Foundation, Inc.
-
-;; Authors: Martin Schoenmakers <aiviru@diamond-age.net>
-;; Bruno FĂ©lix Rezende Ribeiro <oitofelix@gnu.org>
-
-;; 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 mixerctl. It can be used stand-alone, though it's meant for usage
-;; with EMMS, particularly with emms-volume.el
-
-;;; History:
-
-;; Jul 06 2019: Based on emms-volume-amixer.el by Martin Schoenmakers
-
-;;; 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:
-
-(defcustom emms-volume-mixerctl-control "master"
- "The control to change the volume with.
-Controls includes \"master\", \"mono\", etc. For a full list of available
-controls, run `mixerctl -a' in a shell."
- :type '(choice (const :tag "master" "master")
- (const :tag "mono" "mono")
- (string :tag "Something else: "))
- :group 'emms-volume)
-
-(defcustom emms-volume-mixerctl-card 0
- "The card number to change volume.
-The card is identified by a number. For a full list run `ls
-/dev/mixer?*' in a shell."
- :type 'integer
- :group 'emms-volume)
-
-;;;###autoload
-(defun emms-volume-mixerctl-change (amount)
- "Change mixerctl master volume by AMOUNT."
- (message "Playback channels: %s"
- (with-temp-buffer
- (when (zerop
- (call-process "mixerctl" nil (current-buffer) nil
- "-f"
- (format "/dev/mixer%d" emms-volume-mixerctl-card)
- (let ((amount-str
- (format "%s%d" (if (< amount 0) "-" "+")
- (abs amount))))
- (format "outputs.%s=%s,%s"
- emms-volume-mixerctl-control
- amount-str amount-str))))
- (if (and (forward-line -1)
- (re-search-forward "^\\(.*\\):.*->.*,\\(.*\\)$" nil t))
- (format "%s -> %s" (match-string 1) (match-string 2)))))))
-
-(provide 'emms-volume-mixerctl)
-
-;;; emms-volume-mixerctl.el ends here