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ardour { ["type"] = "EditorAction", name = "Vamp Audio to MIDI",
description = "analyze audio from selected audio region to selected midi region" }
function factory () return function ()
local sel = Editor:get_selection ()
local sr = Session:nominal_frame_rate ()
local tm = Session:tempo_map ()
local vamp = ARDOUR.LuaAPI.Vamp ("libardourvampplugins:qm-transcription", sr)
local midi_region
local audio_regions = {}
local start_time = Session:current_end_frame ()
local end_time = Session:current_start_frame ()
for r in sel.regions:regionlist ():iter () do
if r:to_midiregion():isnil() then
local st = r:position()
local ln = r:length()
local et = st + ln
if st < start_time then
start_time = st
end
if et > end_time then
end_time = et
end
table.insert(audio_regions, r)
else
midi_region = r:to_midiregion()
end
end
assert (audio_regions and midi_region)
midi_region:set_initial_position(start_time)
midi_region:set_length(end_time - start_time, 0)
for i,ar in pairs(audio_regions) do
local a_off = ar:position ()
local b_off = midi_region:quarter_note () - midi_region:start_beats ()
vamp:analyze (ar:to_readable (), 0, nil)
local fl = vamp:plugin ():getRemainingFeatures ():at (0)
if fl and fl:size() > 0 then
local mm = midi_region:midi_source(0):model()
local midi_command = mm:new_note_diff_command ("Audio2Midi")
for f in fl:iter () do
local ft = Vamp.RealTime.realTime2Frame (f.timestamp, sr)
local fd = Vamp.RealTime.realTime2Frame (f.duration, sr)
local fn = f.values:at (0)
local bs = tm:exact_qn_at_frame (a_off + ft, 0)
local be = tm:exact_qn_at_frame (a_off + ft + fd, 0)
local pos = Evoral.Beats (bs - b_off)
local len = Evoral.Beats (be - bs)
local note = ARDOUR.LuaAPI.new_noteptr (1, pos, len, fn + 1, 0x7f)
midi_command:add (note)
end
mm:apply_command (Session, midi_command)
end
end
end end
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