ardour alsa input switcher

alsa-input-switch.lua

-- change alsa input source for hda realtek codec (ALC888)
ardour {
	["type"] = "EditorAction",
	name = "ALSA Mixer Store",
	author = "DMC",
	description = [[
	ALSA Capture sources
	]]
}

function factory() return function()

	local invalidate = {}
		
	local dialog_options = {
		{ type = "label", colspan = 5, title = "" },
		{ type = "radio", col = 1, colspan = 7, key = "select", title = "", values ={ ["LINE-IN"] = "set-line-in", ["FRONT-MIC"] = "set-front-in", ["REAR-MIC"] = "set-rear-in" }, default = "LINE-IN"},
		{ type = "label", colspan = 5, title = "" },
	}

	local rv = LuaDialog.Dialog("ALSA Mixer Store:", dialog_options):run()

	if rv then
		local choice = rv["select"]
		if choice == "set-line-in" then
			print("Selected LINE-IN")
			os.execute("amixer -c0 cset numid=23 2")
		end

		if choice == "set-front-in" then
			print("Selected FRONT-IN")
			os.execute("amixer -c0 cset numid=23 1")	
		end

		if choice == "set-rear-in" then
			print("Selected REAR-IN")
			os.execute("amixer -c0 cset numid=23 0")
		end
	end
end end