LuaProc: add option to set time information

share/scripts/_time_info.lua

@@ -0,0 +1,44 @@
+ardour {
+	["type"]    = "dsp",
+	name        = "Time Info",
+	category    = "Utility",
+	author      = "Ardour Team",
+	license     = "MIT",
+	description = [[Example to use processing time info]]
+}
+
+function dsp_ioconfig ()
+	return { { midi_in = 1, midi_out = 1, audio_in = -1, audio_out = -1}, }
+end
+
+function dsp_options ()
+	return { time_info = true }
+end
+
+function dsp_run (_, _, n_samples)
+	assert (type(midiout) == "table")
+	assert (type(time) == "table")
+	assert (type(midiout) == "table")
+	local cnt = 1;
+
+	function tx_midi (time, data)
+		midiout[cnt] = {}
+		midiout[cnt]["time"] = time;
+		midiout[cnt]["data"] = data;
+		cnt = cnt + 1;
+	end
+
+	-- printing from rt-context is not thread-safe
+	print ("---")
+	for k,v in pairs (time) do
+		print (k, v);
+	end
+
+	-- pass-thru MIDI
+	for _,b in pairs (midiin) do
+		local t = b["time"] -- t = [ 1 .. n_samples ]
+		local d = b["data"] -- midi-event data
+		tx_midi (t, d)
+	end
+
+end