From 0a4090965576fc55ae9d67da3dd93855a0b0134d Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 18 Feb 2017 02:25:28 +0100
Subject: Bundle Audio to MIDI Lua script

---
 scripts/_vamp_audio_to_midi.lua | 58 ----------------------------------
 scripts/vamp_audio_to_midi.lua  | 70 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 58 deletions(-)
 delete mode 100644 scripts/_vamp_audio_to_midi.lua
 create mode 100644 scripts/vamp_audio_to_midi.lua

(limited to 'scripts')

diff --git a/scripts/_vamp_audio_to_midi.lua b/scripts/_vamp_audio_to_midi.lua
deleted file mode 100644
index f2395eb40c..0000000000
--- a/scripts/_vamp_audio_to_midi.lua
+++ /dev/null
@@ -1,58 +0,0 @@
-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
diff --git a/scripts/vamp_audio_to_midi.lua b/scripts/vamp_audio_to_midi.lua
new file mode 100644
index 0000000000..79fc32ac83
--- /dev/null
+++ b/scripts/vamp_audio_to_midi.lua
@@ -0,0 +1,70 @@
+ardour {
+	["type"] = "EditorAction",
+	name = "Polyphonic Audio to MIDI",
+	license     = "MIT",
+	author      = "Ardour Team",
+description = [[
+Analyze audio from the selected audio region to a selected MIDI region.
+
+A MIDI region on the target track will have to be created first (use the pen tool).
+
+This script uses the Polyphonic Transcription VAMP plugin from Queen Mary Univ, London.
+The plugin works best at 44.1KHz input sample rate, and is tuned for piano and guitar music. Velocity is not estimated.
+]]
+}
+
+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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