1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
;;; emms-volume-amixer.el --- a mode for changing volume using amixer -*- lexical-binding: t; -*-
;; Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; Author: Martin Schoenmakers <aiviru@diamond-age.net>
;; 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 amixer. It can be used stand-alone, though it's meant for usage
;; with EMMS, particularly with emms-volume.el
;;; History:
;; May 30 2006: First cleanup and collation of amixer functions into a
;; separate file for releasability.
;;; 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-amixer-control "Master"
"The control to change the volume with.
Controls includes \"Master\", \"PCM\", etc. For a full list of available
controls, run `amixer controls' in a shell."
:type '(choice (const :tag "Master" "Master")
(const :tag "PCM" "PCM")
(string :tag "Something else: "))
:group 'emms-volume)
(defcustom emms-volume-amixer-card 0
"The card number to change volume.
The card is identified by a number. For a full list run `cat
/proc/asound/cards' in a shell."
:type 'integer
:group 'emms-volume)
;;;###autoload
(defun emms-volume-amixer-change (amount)
"Change amixer master volume by AMOUNT."
(message "Playback channels: %s"
(with-temp-buffer
(when (zerop
(call-process "amixer" nil (current-buffer) nil
"-c"
(format "%d" emms-volume-amixer-card)
"sset" emms-volume-amixer-control
(format "%d%%%s" (abs amount)
(if (< amount 0) "-" "+"))))
(if (re-search-backward "\\[\\([0-9]+%\\)\\]" nil t)
(match-string 1))))))
(provide 'emms-volume-amixer)
;;; emms-volume-amixer.el ends here
|
