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45981f39aec8c90d2c78f69737c76d70f269aa1e
[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 local string       = { gmatch = string.gmatch,
13                        match  = string.match,
14                        format = string.format }
15 local setmetatable = setmetatable
16
17 -- PulseAudio volume
18 -- lain.widgets.pulseaudio
19 local pulseaudio = {}
20
21 local function worker(args)
22    local args        = args or {}
23    local timeout     = args.timeout or 5
24    local settings    = args.settings or function() end
25    local scallback   = args.scallback
26
27    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'")
28    pulseaudio.widget = wibox.widget.textbox()
29
30    function pulseaudio.update()
31       if scallback then pulseaudio.cmd = scallback() end
32       local s = read_pipe(pulseaudio.cmd)
33
34       volume_now = {}
35       volume_now.index = string.match(s, "index: (%S+)") or "N/A"
36       volume_now.sink  = string.match(s, "device.string = \"(%S+)\"") or "N/A"
37       volume_now.muted = string.match(s, "muted: (%S+)") or "N/A"
38
39       local ch = 1
40       volume_now.channel = {}
41       for v in string.gmatch(s, ":.-(%d+)%%") do
42           volume_now.channel[ch] = v
43           ch = ch + 1
44       end
45
46       volume_now.left  = volume_now.channel[1] or "N/A"
47       volume_now.right = volume_now.channel[2] or "N/A"
48
49       widget = pulseaudio.widget
50       settings()
51    end
52
53    newtimer(string.format("pulseaudio-%s", timeout), timeout, pulseaudio.update)
54
55    return setmetatable(pulseaudio, { __index = pulseaudio.widget })
56 end
57
58 return setmetatable(pulseaudio, { __call = function(_, ...) return worker(...) end })