expose Lua OSC transmitter

scripts/osc_hook_example.lua

@@ -0,0 +1,51 @@
+ardour {
+	["type"]    = "EditorHook",
+	name        = "OSC Callback Example",
+	description = "Send OSC messages",
+}
+
+function action_params ()
+	return
+	{
+		["uri"] = { title = "OSC URI ", default = "osc.udp://localhost:7890"},
+	}
+end
+
+
+function signals ()
+	s = LuaSignal.Set()
+	s:add (
+		{
+			[LuaSignal.SoloActive] = true,
+			[LuaSignal.RegionPropertyChanged] = true,
+			[LuaSignal.Exported] = true,
+			[LuaSignal.TransportStateChange] = true
+		}
+	)
+	return s
+end
+
+function factory (params)
+	return function (signal, ref, ...)
+		local uri = params["unique"] or "osc.udp://localhost:7890"
+		local tx = OSC.Address (uri)
+		-- debug print (stdout)
+		-- print (signal, ref, ...)
+
+		if (signal == LuaSignal.Exported) then
+			tx:send ("/session/exported", "ss", ...)
+		elseif (signal == LuaSignal.SoloActive) then
+			tx:send ("/session/solo_changed", "")
+		elseif (signal == LuaSignal.TransportStateChange) then
+			tx:send ("/session/transport", "if",
+				Session:transport_frame(), Session:transport_speed())
+		elseif (signal == LuaSignal.RegionPropertyChanged) then
+			obj,pch = ...
+			tx:send ("/region_property_changed", "sTTiii",
+				obj:name (),
+				(pch:containsFramePos (ARDOUR.Properties.Start)),
+				(pch:containsFramePos (ARDOUR.Properties.Length)),
+				obj:position (), obj:start (), obj:length ())
+		end
+	end
+end