exercise new lua bindings

scripts/tomsloop.lua

@@ -0,0 +1,67 @@
+ardour { ["type"] = "Snippet", name = "Tom's Loop",
+	license     = "MIT",
+	author      = "Robin Gareus",
+	email       = "robin@gareus.org",
+	site        = "http://gareus.org",
+	description = [[Bounce the loop-range of all non muted audio tracks, paste N times at playhead]]
+}
+
+-- unused ;  cfg parameter for ["type"] = "EditorAction"
+function action_params ()
+	return { ["times"]   = { title = "Number of copies to add", default = "1"}, }
+end
+
+function factory () return function ()
+	-- get options
+	local p = params or {}
+	local npaste   = p["times"] or 1
+	assert (npaste > 0)
+
+	local proc     = ARDOUR.LuaAPI.nil_proc () -- bounce w/o processing
+	local itt      = ARDOUR.InterThreadInfo () -- bounce progress info (unused)
+
+	local loop     = Session:locations ():auto_loop_location ()
+	local playhead = Session:transport_frame ()
+
+	-- make sure we have a loop, and the playhead (edit point) is after it
+	-- TODO: only print an error and return
+	-- TODO: use the edit-point (not playhead) ? maybe.
+	assert (loop)
+	assert (loop:start () < loop:_end ())
+	assert (loop:_end () < playhead)
+
+	for route in Session:get_tracks ():iter () do
+		-- skip muted tracks
+		if route:muted () then
+			goto continue
+		end
+		-- test if bouncing is possible
+		local track = route:to_track ()
+		if not track:bounceable (proc, false) then
+			goto continue;
+		end
+		-- only audio tracks
+		local playlist = track:playlist ()
+		if playlist:data_type ():to_string() ~= "audio" then
+			goto continue
+		end
+
+		-- check if there are any regions in the loop-range of this track
+		local range = Evoral.Range (loop:start (), loop:_end ())
+		if playlist:regions_with_start_within (range):empty () then
+			goto continue
+		end
+		if playlist:regions_with_end_within (range):empty () then
+			goto continue
+		end
+
+		-- all set
+		--print (track:name ())
+
+		-- do the actual work
+		local region = track:bounce_range (loop:start (), loop:_end (), itt, proc, false)
+		playlist:add_region(region, playhead, npaste, false)
+
+		::continue::
+	end
+end end