1 files changed, 68 insertions, 0 deletions
diff --git a/share/scripts/_vamp_note_example.lua b/share/scripts/_vamp_note_example.lua
new file mode 100644
index 0000000000..6a93dd8ee4
--- /dev/null
+++ b/share/scripts/_vamp_note_example.lua
@@ -0,0 +1,68 @@
+ardour { ["type"] = "Snippet", name = "Vamp Audio Transcription Example" }
+
+function factory () return function ()
+
+	-- get Editor selection
+	-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Editor
+	-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:Selection
+	local sel = Editor:get_selection ()
+	local sr = Session:nominal_sample_rate ()
+
+	-- Instantiate a Vamp Plugin
+	-- see http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:LuaAPI:Vamp
+	local vamp = ARDOUR.LuaAPI.Vamp ("libardourvampplugins:qm-transcription", sr)
+
+	-- prepare progress dialog
+	local progress_total = 0;
+	local progress_part = 0
+	local pdialog = LuaDialog.ProgressWindow ("Audio to MIDI", true)
+	function cb (_, pos)
+		return pdialog:progress ((pos + progress_part) / progress_total, "Analyzing")
+	end
+
+	-- calculate max progress
+	for r in sel.regions:regionlist ():iter () do
+		progress_total = progress_total + r:to_readable ():readable_length ()
+	end
+
+	-- for each selected region
+	-- http://manual.ardour.org/lua-scripting/class_reference/#ArdourUI:RegionSelection
+	for r in sel.regions:regionlist ():iter () do
+		-- "r" is-a http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Region
+
+		vamp:analyze (r:to_readable (), 0, cb)
+
+		if pdialog:canceled () then
+			goto out
+		end
+
+		progress_part = progress_part + r:to_readable ():readable_length ()
+		pdialog:progress (progress_part / progress_total, "Post Processing")
+
+		print ("-- Post Processing: ", r:name ())
+
+		-- post-processing takes longer than actually parsing the data :(
+		local f = vamp:plugin ():getRemainingFeatures ()
+
+		local fl = f:table ()[0]
+		print (" Time (sample) |  Len  | Midi-Note");
+		if fl then for f in fl:iter () do
+			assert (f.hasTimestamp and f.hasDuration);
+			local ft = Vamp.RealTime.realTime2Frame (f.timestamp, sr)
+			local fd = Vamp.RealTime.realTime2Frame (f.duration, sr)
+			local fn = f.values:at (0) -- midi note number
+			print (string.format (" %14d %7d %d", ft, fd, fn))
+		end end
+
+		-- reset the plugin (prepare for next iteration)
+		vamp:reset ()
+	end
+
+	::out::
+	-- hide modal progress dialog and destroy it
+	pdialog:done ();
+	pdialog = nil
+	vamp = nil;
+	collectgarbage ()
+
+end end