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