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4f057799a03025fd7f596926dab8eed42ced3a14
[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          = { match  = string.match,
14                           format = string.format }
15
16 local setmetatable    = setmetatable
17
18 -- PulseAudio volume
19 -- lain.widgets.pulseaudio
20 local pulseaudio = {}
21
22 local function worker(args)
23    local args        = args or {}
24    local timeout     = args.timeout or 5
25    local settings    = args.settings or function() end
26    local scallback   = args.scallback or nil
27
28    pulseaudio.sink   = args.sink or 0 -- user defined or first one
29    pulseaudio.cmd    = args.cmd or string.format("pacmd list-sinks | sed -n -e '/base volume/d' -e '/index: %d/p' -e '/volume:/p' -e '/muted:/p' | sed -n -e '/index: %d/,+2p'",
30                        pulseaudio.sink, pulseaudio.sink)
31    pulseaudio.widget = wibox.widget.textbox('')
32
33    function pulseaudio.update()
34       local s = read_pipe(pulseaudio.cmd)
35
36       volume_now = {}
37       volume_now.left  = tonumber(string.match(s, "left.-(%d+)%%")) or tonumber(string.match(s, "0:.-(%d+)%%"))
38       volume_now.right = tonumber(string.match(s, "right.-(%d+)%%")) or tonumber(string.match(s, "1:.-(%d+)%%"))
39       volume_now.muted = string.match(s, "muted: (%S+)")
40
41       if scallback ~= nil then
42          pulseaudio.sink   = scallback()
43       end
44
45       widget = pulseaudio.widget
46       settings()
47    end
48
49    newtimer(string.format("pulseaudio-%s", pulseaudio.sink), timeout, pulseaudio.update)
50
51    return setmetatable(pulseaudio, { __index = pulseaudio.widget })
52 end
53
54 return setmetatable(pulseaudio, { __call = function(_, ...) return worker(...) end })