37 lines
1020 B
Lua
37 lines
1020 B
Lua
ardour {
|
|
["type"] = "session",
|
|
name = "Rewrite Midi",
|
|
license = "MIT",
|
|
author = "Robin Gareus",
|
|
email = "robin@gareus.org",
|
|
site = "http://gareus.org",
|
|
description = [[An example session script preprocesses midi buffers.]]
|
|
}
|
|
|
|
function factory ()
|
|
-- this function is called in every process cycle, before processing
|
|
return function (n_samples)
|
|
_, t = Session:engine ():get_ports (ARDOUR.DataType.midi (), ARDOUR.PortList ())
|
|
for p in t[2]:iter () do
|
|
if not p:receives_input () then goto next end
|
|
|
|
if not p:name () == "MIDI/midi_in 1" then goto next end
|
|
|
|
midiport = p:to_midiport ()
|
|
assert (not midiport:isnil ())
|
|
mb = midiport:get_midi_buffer (n_samples);
|
|
|
|
events = mb:table() -- copy event list into lua table
|
|
mb:silence (n_samples, 0); -- clear existing buffer
|
|
|
|
for _,e in pairs (events) do
|
|
-- e is an http://ardourman/lua-scripting/class_reference/#Evoral:MidiEvent
|
|
e:set_channel (2)
|
|
mb:push_event (e)
|
|
end
|
|
|
|
::next::
|
|
end
|
|
end
|
|
end
|