| 1 | ;;; emms-volume-mixerctl.el --- a mode for changing volume using mixerctl -*- lexical-binding: t; -*- |
| 2 | |
| 3 | ;; Copyright (C) 2006, 2007, 2008, 2009, 2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Authors: Martin Schoenmakers <aiviru@diamond-age.net> |
| 6 | ;; Bruno Félix Rezende Ribeiro <oitofelix@gnu.org> |
| 7 | |
| 8 | ;; This file is part of EMMS. |
| 9 | |
| 10 | ;; EMMS is free software; you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation; either version 3, or (at your option) |
| 13 | ;; any later version. |
| 14 | ;; |
| 15 | ;; EMMS is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | ;; |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with EMMS; see the file COPYING. If not, write to the |
| 22 | ;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| 23 | ;; Boston, MA 02110-1301, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;; This file defines a few simple functions to raise or lower the volume |
| 28 | ;; using mixerctl. It can be used stand-alone, though it's meant for usage |
| 29 | ;; with EMMS, particularly with emms-volume.el |
| 30 | |
| 31 | ;;; History: |
| 32 | |
| 33 | ;; Jul 06 2019: Based on emms-volume-amixer.el by Martin Schoenmakers |
| 34 | |
| 35 | ;;; Todo: |
| 36 | |
| 37 | ;; There probably needs to be more configurability, which may in turn |
| 38 | ;; mean adding some more functions. |
| 39 | ;; Some of this could benefit from adding customize interfaces. |
| 40 | |
| 41 | ;;; Code: |
| 42 | |
| 43 | (defcustom emms-volume-mixerctl-control "master" |
| 44 | "The control to change the volume with. |
| 45 | Controls includes \"master\", \"mono\", etc. For a full list of available |
| 46 | controls, run `mixerctl -a' in a shell." |
| 47 | :type '(choice (const :tag "master" "master") |
| 48 | (const :tag "mono" "mono") |
| 49 | (string :tag "Something else: ")) |
| 50 | :group 'emms-volume) |
| 51 | |
| 52 | (defcustom emms-volume-mixerctl-card 0 |
| 53 | "The card number to change volume. |
| 54 | The card is identified by a number. For a full list run `ls |
| 55 | /dev/mixer?*' in a shell." |
| 56 | :type 'integer |
| 57 | :group 'emms-volume) |
| 58 | |
| 59 | ;;;###autoload |
| 60 | (defun emms-volume-mixerctl-change (amount) |
| 61 | "Change mixerctl master volume by AMOUNT." |
| 62 | (message "Playback channels: %s" |
| 63 | (with-temp-buffer |
| 64 | (when (zerop |
| 65 | (call-process "mixerctl" nil (current-buffer) nil |
| 66 | "-f" |
| 67 | (format "/dev/mixer%d" emms-volume-mixerctl-card) |
| 68 | (let ((amount-str |
| 69 | (format "%s%d" (if (< amount 0) "-" "+") |
| 70 | (abs amount)))) |
| 71 | (format "outputs.%s=%s,%s" |
| 72 | emms-volume-mixerctl-control |
| 73 | amount-str amount-str)))) |
| 74 | (if (and (forward-line -1) |
| 75 | (re-search-forward "^\\(.*\\):.*->.*,\\(.*\\)$" nil t)) |
| 76 | (format "%s -> %s" (match-string 1) (match-string 2))))))) |
| 77 | |
| 78 | (provide 'emms-volume-mixerctl) |
| 79 | |
| 80 | ;;; emms-volume-mixerctl.el ends here |