38 lines
1.1 KiB
Lua
38 lines
1.1 KiB
Lua
ardour {
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["type"] = "dsp",
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name = "MIDI Generator II",
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category = "Example",
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license = "MIT",
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author = "Ardour Lua Task Force",
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description = [[An Example Midi Generator for prototyping.]]
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}
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function dsp_ioconfig ()
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return { { midi_in = 1, midi_out = 1, audio_in = -1, audio_out = -1}, }
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end
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function dsp_configure (ins, outs)
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n_out = outs
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n_out:set_midi (0)
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end
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function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
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local ob = out_map:get (ARDOUR.DataType ("midi"), 0)
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if ob ~= ARDOUR.ChanMapping.Invalid then
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local mb = bufs:get_midi (ob)
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-- see _midigenerator.lua for
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-- how to use a timed sequence
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local ba = C.ByteVector () -- construct a byte vector
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ba:add ({0x90, 64, 127}) -- add some data to the vector
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-- send a message at cycle-start
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mb:push_back (offset, Evoral.EventType.MIDI_EVENT, ba:size (), ba:to_array());
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ba:clear ()
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ba:add ({0x80, 64, 127})
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mb:push_back (n_samples - 1 - offset, Evoral.EventType.MIDI_EVENT, ba:size (), ba:to_array(), 0);
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end
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ARDOUR.DSP.process_map (bufs, n_out, in_map, out_map, n_samples, offset)
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end
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