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[etc/awesome.git] / widgets / pulseaudio.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2016, Luke Bonham                     
6                                                   
7 --]]
8
9 local read_pipe    = require("lain.helpers").read_pipe
10 local newtimer     = require("lain.helpers").newtimer
11 local wibox        = require("wibox")
12
13 local string       = { gmatch = string.gmatch,
14                        match  = string.match,
15                        format = string.format }
16
17 local setmetatable = setmetatable
18
19 -- PulseAudio volume
20 -- lain.widgets.pulseaudio
21 local pulseaudio = {}
22
23 local function worker(args)
24    local args        = args or {}
25    local timeout     = args.timeout or 5
26    local settings    = args.settings or function() end
27    local scallback   = args.scallback
28
29    pulseaudio.cmd    = args.cmd or string.format("pacmd list-sinks | sed -n -e '0,/*/d' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'")
30    pulseaudio.widget = wibox.widget.textbox('')
31
32    function pulseaudio.update()
33       if scallback then pulseaudio.cmd = scallback() end
34       local s = read_pipe(pulseaudio.cmd)
35
36       volume_now = {}
37       volume_now.index = string.match(s, "index: (%S+)") or "N/A"
38       volume_now.sink  = string.match(s, "device.string = \"(%S+)\"") or "N/A"
39       volume_now.muted = string.match(s, "muted: (%S+)") or "N/A"
40
41       local ch = 1
42       volume_now.channel = {}
43       for v in string.gmatch(s, ":.-(%d+)%%") do
44           volume_now.channel[ch] = v
45           ch = ch + 1
46       end
47
48       volume_now.left  = volume_now.channel[1] or "N/A"
49       volume_now.right = volume_now.channel[2] or "N/A"
50
51       widget = pulseaudio.widget
52       settings()
53    end
54
55    newtimer(string.format("pulseaudio-%s", timeout), timeout, pulseaudio.update)
56
57    return setmetatable(pulseaudio, { __index = pulseaudio.widget })
58 end
59
60 return setmetatable(pulseaudio, { __call = function(_, ...) return worker(...) end })