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