1 ardour { ["type"] = "EditorAction", name = "Vamp Audio to MIDI",
2 description = "analyze audio from selected audio region to selected midi region" }
4 function factory () return function ()
5 local sel = Editor:get_selection ()
6 local sr = Session:nominal_frame_rate ()
7 local tm = Session:tempo_map ()
8 local vamp = ARDOUR.LuaAPI.Vamp ("libardourvampplugins:qm-transcription", sr)
10 for r in sel.regions:regionlist ():iter () do
11 if r:to_midiregion():isnil() then
14 mr = r:to_midiregion()
19 local a_off = ar:position ()
20 local b_off = 4.0 * mr:pulse () - mr:start_beats ()
22 vamp:analyze (ar:to_readable (), 0, nil)
23 local fl = vamp:plugin ():getRemainingFeatures ():at (0)
24 if fl and fl:size() > 0 then
25 local mm = mr:midi_source(0):model()
26 local midi_command = mm:new_note_diff_command ("Audio2Midi")
27 for f in fl:iter () do
28 local ft = Vamp.RealTime.realTime2Frame (f.timestamp, sr)
29 local fd = Vamp.RealTime.realTime2Frame (f.duration, sr)
30 local fn = f.values:at (0)
32 local bs = tm:exact_qn_at_frame (a_off + ft, 0)
33 local be = tm:exact_qn_at_frame (a_off + ft + fd, 0)
35 local pos = Evoral.Beats (bs - b_off)
36 local len = Evoral.Beats (be - bs)
37 local note = ARDOUR.LuaAPI.new_noteptr (1, pos, len, fn + 1, 0x7f)
38 midi_command:add (note)
40 mm:apply_command (Session, midi_command)