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 local audio_regions = {}
11 local start_time = Session:current_end_frame ()
12 local end_time = Session:current_start_frame ()
13 for r in sel.regions:regionlist ():iter () do
14 if r:to_midiregion():isnil() then
15 local st = r:position()
18 if st < start_time then
24 table.insert(audio_regions, r)
26 midi_region = r:to_midiregion()
29 assert (audio_regions and midi_region)
30 midi_region:set_initial_position(start_time)
31 midi_region:set_length(end_time - start_time, 0)
33 for i,ar in pairs(audio_regions) do
34 local a_off = ar:position ()
35 local b_off = midi_region:quarter_note () - midi_region:start_beats ()
37 vamp:analyze (ar:to_readable (), 0, nil)
38 local fl = vamp:plugin ():getRemainingFeatures ():at (0)
39 if fl and fl:size() > 0 then
40 local mm = midi_region:midi_source(0):model()
41 local midi_command = mm:new_note_diff_command ("Audio2Midi")
42 for f in fl:iter () do
43 local ft = Vamp.RealTime.realTime2Frame (f.timestamp, sr)
44 local fd = Vamp.RealTime.realTime2Frame (f.duration, sr)
45 local fn = f.values:at (0)
47 local bs = tm:exact_qn_at_frame (a_off + ft, 0)
48 local be = tm:exact_qn_at_frame (a_off + ft + fd, 0)
50 local pos = Evoral.Beats (bs - b_off)
51 local len = Evoral.Beats (be - bs)
52 local note = ARDOUR.LuaAPI.new_noteptr (1, pos, len, fn + 1, 0x7f)
53 midi_command:add (note)
55 mm:apply_command (Session, midi_command)