Add tom's additions to tom's loop and turn it into an Action Script

scripts/a_tomsloop.lua

@@ -1,4 +1,4 @@
-ardour { ["type"] = "Snippet", name = "Tom's Loop",
+ardour { ["type"] = "EditorAction", name = "Tom's Loop",
 	license     = "MIT",
 	author      = "Robin Gareus",
 	email       = "robin@gareus.org",
@@ -6,16 +6,15 @@ ardour { ["type"] = "Snippet", name = "Tom's Loop",
 	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 ()
+function factory (params) return function ()
 	-- get options
 	local p = params or {}
-	local npaste   = p["times"] or 1
-	assert (npaste > 0)
+	local n_paste  = tonumber (p["times"] or 1)
+	assert (n_paste > 0)
 
 	local proc     = ARDOUR.LuaAPI.nil_proc () -- bounce w/o processing
 	local itt      = ARDOUR.InterThreadInfo () -- bounce progress info (unused)
@@ -38,33 +37,67 @@ function factory () return function ()
 	Session:begin_reversible_command ("Tom's Loop")
 	local add_undo = false -- keep track if something has changed
 
+	-- prefer solo'ed tracks
+	local soloed_track_found = false
 	for route in Session:get_tracks ():iter () do
-		-- skip muted tracks
+		if route:soloed () then
+			soloed_track_found = true
+			break
+		end
+	end
+
+	-- count regions that are bounced
+	local n_regions_created = 0
+
+	-- loop over all tracks in the session
+	for route in Session:get_tracks ():iter () do
+		if soloed_track_found then
+			-- skip not soloed tracks
+			if not route:soloed () then
+				goto continue
+			end
+		end
+
+		-- skip muted tracks (also applies to soloed + muted)
 		if route:muted () then
 			goto continue
 		end
+
+		-- at this point the track is either soloed (if at least one track is soloed)
+		-- or not muted (if no track is soloed)
+
 		-- 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
-		if playlist:regions_touched (loop:start (), loop:_end ()):empty () then
+		-- check if there is at least one unmuted region in the loop-range
+		local reg_unmuted_count = 0
+		for reg in playlist:regions_touched (loop:start (), loop:_end ()):iter () do
+			if not reg:muted() then
+				reg_unmuted_count = reg_unmuted_count + 1
+			end
+		end
+
+		if reg_unmuted_count < 1 then
 			goto continue
 		end
 
-		-- clear existing changes, prepare "diff" of state
+		-- clear existing changes, prepare "diff" of state for undo
 		playlist:to_stateful ():clear_changes ()
 
 		-- do the actual work
 		local region = track:bounce_range (loop:start (), loop:_end (), itt, proc, false)
-		playlist:add_region (region, playhead, npaste, false)
+		playlist:add_region (region, playhead, n_paste, false)
+
+		n_regions_created = n_regions_created + 1
 
 		-- create a diff of the performed work, add it to the session's undo stack
 		-- and check if it is not empty
@@ -74,12 +107,21 @@ function factory () return function ()
 
 		::continue::
 	end
+
+	--advance playhead so it's just after the newly added regions
+	if n_regions_created > 0 then
+		Session:request_locate((playhead + loop:length() * n_paste),false)
+	end
+
 	-- all done, commit the combined Undo Operation
 	if add_undo then
-		-- the 'nil' Commend here mean to use the collected diffs added above
+		-- the 'nil' Command here mean to use the collected diffs added above
 		Session:commit_reversible_command (nil)
 	else
 		Session:abort_reversible_command ()
 	end
+
+	print ("bounced " .. n_regions_created .. " regions from loop range (" .. loop:length() ..  " frames) to playhead @ frame # " .. playhead)
+
 	::errorout::
 end end