115 lines
2.9 KiB
Lua
115 lines
2.9 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2010, MrMagne <mr.magne@yahoo.fr>
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-- * (c) 2010, Mic92 <jthalheim@gmail.com>
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---------------------------------------------------
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-- {{{ Grab environment
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local type = type
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local tonumber = tonumber
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local io = { popen = io.popen }
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local setmetatable = setmetatable
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local os = { execute = os.execute }
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local table = { insert = table.insert }
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local string = {
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find = string.find,
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match = string.match,
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format = string.format,
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gmatch = string.gmatch
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}
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local math = {
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floor = math.floor
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}
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-- }}}
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-- Pulse: provides volume levels of requested pulseaudio sinks and methods to change them
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module("vicious.contrib.pulse")
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-- {{{ Helper function
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local function pacmd(args)
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local f = io.popen("pacmd "..args)
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local line = f:read("*all")
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f:close()
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return line
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end
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local function escape(text)
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local special_chars = { ["."] = "%.", ["-"] = "%-" }
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return text:gsub("[%.%-]", special_chars)
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end
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local cached_sinks = {}
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local function get_sink_name(sink)
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if type(sink) == "string" then return sink end
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-- avoid nil keys
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local key = sink or 1
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-- Cache requests
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if not cached_sinks[key] then
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local line = pacmd("list-sinks")
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for s in string.gmatch(line, "name: <(.-)>") do
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table.insert(cached_sinks, s)
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end
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end
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return cached_sinks[key]
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end
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-- }}}
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-- {{{ Pulseaudio widget type
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local function worker(format, sink)
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sink = get_sink_name(sink)
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if sink == nil then return {0, "unknown"} end
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-- Get sink data
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local data = pacmd("dump")
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-- If mute return 0 (not "Mute") so we don't break progressbars
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if string.find(data,"set%-sink%-mute "..escape(sink).." yes") then
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return {0, "off"}
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end
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local vol = tonumber(string.match(data, "set%-sink%-volume "..escape(sink).." (0x[%x]+)"))
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if vol == nil then vol = 0 end
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return { math.floor(vol/0x10000*100), "on"}
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end
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-- }}}
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-- {{{ Volume control helper
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function add(percent, sink)
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sink = get_sink_name(sink)
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if sink == nil then return end
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local data = pacmd("dump")
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local pattern = "set%-sink%-volume "..escape(sink).." (0x[%x]+)"
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local initial_vol = tonumber(string.match(data, pattern))
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local vol = initial_vol + percent/100*0x10000
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if vol > 0x10000 then vol = 0x10000 end
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if vol < 0 then vol = 0 end
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local cmd = string.format("pacmd set-sink-volume %s 0x%x >/dev/null", sink, vol)
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return os.execute(cmd)
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end
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function toggle(sink)
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sink = get_sink_name(sink)
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if sink == nil then return end
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local data = pacmd("dump")
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local pattern = "set%-sink%-mute "..escape(sink).." (%a%a%a?)"
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local mute = string.match(data, pattern)
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-- 0 to enable a sink or 1 to mute it.
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local state = { yes = 0, no = 1}
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local cmd = string.format("pacmd set-sink-mute %s %d", sink, state[mute])
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return os.execute(cmd)
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end
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-- }}}
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setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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