40 lines
1.5 KiB
Lua
40 lines
1.5 KiB
Lua
ardour {
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["type"] = "dsp",
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name = "Midi Passthru",
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category = "Example",
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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 Midi Passthrough Plugin using raw buffers.]]
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}
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function dsp_ioconfig ()
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return { { audio_in = 0, audio_out = 0}, }
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end
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function dsp_has_midi_input () return true end
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function dsp_has_midi_output () return true end
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-- "dsp_runmap" uses Ardour's internal processor API, eqivalent to
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-- 'connect_and_run()". There is no overhead (mapping, translating buffers).
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-- The lua implementation is responsible to map all the buffers directly.
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function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
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-- see http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:ChanMapping
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local ib = in_map:get (ARDOUR.DataType ("midi"), 0); -- get index of the 1st mapped midi input buffer
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local ob = in_map:get (ARDOUR.DataType ("midi"), 0); -- get index of the 1st mapped midi output buffer
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assert (ib ~= ARDOUR.ChanMapping.Invalid);
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assert (ib == ob); -- require inplace, buffers are identical
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-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:MidiBuffer
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local mb = bufs:get_midi (ib) -- get the mapped buffer
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events = mb:table () -- copy event list into a lua table
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-- iterate over all midi events
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for _,e in pairs (events) do
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-- e is-a http://manual.ardour.org/lua-scripting/class_reference/#Evoral:MidiEvent
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--print (e:channel())
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end
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end
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