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f9a2302f378052553927f60bde80e2f7502730d6
[etc/awesome.git] / widget / pulseaudio.lua
1 --[[
2
3      Licensed under GNU General Public License v2
4       * (c) 2016, Luke Bonham
5
6 --]]
7
8 local helpers = require("lain.helpers")
9 local shell   = require("awful.util").shell
10 local wibox   = require("wibox")
11 local string  = { gmatch = string.gmatch,
12                   match  = string.match,
13                   format = string.format }
14
15 -- PulseAudio volume
16 -- lain.widget.pulseaudio
17
18 local function factory(args)
19     local pulseaudio  = { widget = wibox.widget.textbox() }
20     local args        = args or {}
21     local timeout     = args.timeout or 5
22     local settings    = args.settings or function() end
23     local scallback   = args.scallback
24
25     pulseaudio.device = "N/A"
26     pulseaudio.devicetype = args.devicetype or "sink"
27     pulseaudio.cmd = args.cmd or "pacmd list-" .. pulseaudio.devicetype .. "s | sed -n -e '/*/,$!d' -e '/index/p' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'"
28
29     function pulseaudio.update()
30         if scallback then pulseaudio.cmd = scallback() end
31
32         helpers.async({ shell, "-c", pulseaudio.cmd }, function(s)
33             volume_now = {
34                 index = string.match(s, "index: (%S+)") or "N/A",
35                 device = string.match(s, "device.string = \"(%S+)\"") or "N/A",
36                 sink   = device, -- legacy API
37                 muted  = string.match(s, "muted: (%S+)") or "N/A"
38             }
39
40             pulseaudio.device = volume_now.index
41
42             local ch = 1
43             volume_now.channel = {}
44             for v in string.gmatch(s, ":.-(%d+)%%") do
45                 volume_now.channel[ch] = v
46                 ch = ch + 1
47             end
48
49             volume_now.left  = volume_now.channel[1] or "N/A"
50             volume_now.right = volume_now.channel[2] or "N/A"
51
52             widget = pulseaudio.widget
53
54             settings()
55         end)
56     end
57
58     helpers.newtimer("pulseaudio", timeout, pulseaudio.update)
59
60     return pulseaudio
61 end
62
63 return factory