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| -rw-r--r-- | lisp/emms-volume-mixerctl.el | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/lisp/emms-volume-mixerctl.el b/lisp/emms-volume-mixerctl.el new file mode 100644 index 0000000..4ca7820 --- /dev/null +++ b/lisp/emms-volume-mixerctl.el @@ -0,0 +1,80 @@ +;;; 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 Félix 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 |