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+ardour { ["type"] = "EditorAction", name = "Tom's Loop",
+ license = "MIT",
+ author = "Ardour Team",
+ description = [[Bounce the loop-range of all non muted audio tracks, paste at playhead]]
+}
+
+-- main method, every custom (i.e. non-ardour) method must be defined *inside* factory()
+function factory (params) return function ()
+
+-- when this script is called as an action, the output will be printed to the ardour log window
+ function print_help()
+ printf("See source for help.")
+---[[
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("Manual for \"Tom’s Loop\" Ardour Lua Script")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("Table of Contents")
+ print("")
+ print("1. The first test")
+ print("2. Using mute and solo")
+ print("3. Combining region clouds to a defined length")
+ print("")
+ print("Abstract: This script for Ardour (>=4.7 git) operates on the time")
+ print("line. It allows to copy and combine specific portions within the loop")
+ print("range to a later point on the time line with one single action")
+ print("command. Everything that can be heard within the loop range is")
+ print("considered for this process, namely non-muted regions on non-muted or")
+ print("soloed tracks that are fully or partially inside the loop range. This")
+ print("still sounds a bit abstract and will be more obvious with the")
+ print("following example cases of use.")
+ print("")
+ print("For convenience, it’s recommended to bind the script to a keyboard")
+ print("shortcut in order to quickly and easily access the \"Tom’s Loop\"")
+ print("scripted action.")
+ print("")
+ print("-Open dialog \"Script Manager\" via menu Edit/Scripted Actions/Script")
+ print("Manager")
+ print("")
+ print("-In tab \"Action Scripts\", select a line and press button \"Add/Set\"")
+ print("")
+ print("-In dialog \"Add Lua Action\", select \"Tom’s Loop\" from the drop down")
+ print("menu and hit \"Add\"")
+ print("")
+ print("-In dialog \"Set Script Parameter\" just hit \"Add\" again")
+ print("")
+ print("-Close dialog \"Script Manager\"")
+ print("")
+ print("-Open dialog \"Bindings Editor\" via menu Window/Bindings Editor")
+ print("")
+ print("-In tab \"Editor\", expand \"Editor\", look for entry \"Tom’s loop\",")
+ print("select it")
+ print("")
+ print("-Hit the keyboard shortcut to assign to this scripted action")
+ print("")
+ print("-Close dialog \"Key Bindings\"")
+ print("")
+ print("An alternative way to quickly access a scripted action is to enable")
+ print("\"Action Script Button Visibility\" in \"Preferences/GUI\".")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("1. The first test")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("-Record a short sequence of audio input or import a wave file to a")
+ print("track to get a region")
+ print("")
+ print("-Set a loop range inside that one region")
+ print("")
+ print("-Place the playhead after the loop range, possibly after the region,")
+ print("non-rolling")
+ print("")
+ print(" _L====L_ V")
+ print(" .____|____|____________. |")
+ print(" |R1__|_x__|____________| |")
+ print("")
+ print("-Call \"Tom’s Loop\" via the previously created shortcut")
+ print("")
+ print("This results in a new region created at the playhead, with the length")
+ print("of the loop range, containing audio of the original region. The")
+ print("playhead moved to the end of this new region so that subsequent calls")
+ print("to \"Tom’s Loop\" will result in a gap less series of regions.")
+ print("")
+ print(" _L====L_ --> V")
+ print(" .____|____|____________. .____|")
+ print(" |R1__|_x__|____________| |_x__|")
+ print("")
+ print("-Repeat calling \"Tom’s Loop\"")
+ print("")
+ print("This creates multiple copies of the loop range to line up one after")
+ print("each other.")
+ print("")
+ print(" _L====L_ --> V")
+ print(" .____|____|____________. .______________|")
+ print(" |R1__|_x__|____________| |_x__|_x__|_x__|")
+ print("")
+ print("-Set a different loop range and call \"Tom’s Loops\" again")
+ print("")
+ print("This will create a new region with the length of the new loop range")
+ print("at the playhead.")
+ print("")
+ print(" _L=======L_ --> V")
+ print(" ._______|_______|______. .______________________|")
+ print(" |R1_____|_X_____|______| |_x__|_x__|_x__|_X_____|")
+ print("")
+ print("By using \"Tom’s Loop\", the loop range - which can be easily set with")
+ print("the handles - and the playhead it’s easy to create any sequence of")
+ print("existing regions on the time line. This can be useful during the")
+ print("arrangement phase where macro parts of the session are already")
+ print("temporally layed out (in the loop) but not part of the final")
+ print("arrangement yet. The process is non-destructive in a sense that the")
+ print("existing regions layout in the current loop range won’t be touched or")
+ print("replaced. The newly created regions are immediately visible on the")
+ print("time line at the playhead position.")
+ print("")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("2. Using mute and solo")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("Creating a sequence of regions like described above respects the")
+ print("current mute and solo state of a track. Variations of the loop are")
+ print("thus easy to create, further supporting the arrangement process.")
+ print("")
+ print(" _L====L_ --> V")
+ print(" .____|____|____________. ._________. |")
+ print(" |R1__|_x__|____________| |_x__|_x__| |")
+ print(" .__|R2|_y__|________|_. |_y__|_________|")
+ print(" |R3___|_z__|__________| |_z__|_z__|")
+ print("")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("3. Combining region clouds to a defined length")
+ print("")
+ print("---------------------------------------------------------------------")
+ print("")
+ print("Multiple small regions say on a percussive track can be simplified")
+ print("for later arrangement keeping the temporal relations by combining")
+ print("them. Using \"Tom’s Loop\", the resulting regions will not only combine")
+ print("the regions but also automatically extend or shrink the new regions")
+ print("start and end point so that it is exactly of the wished length equal")
+ print("to the loop range.")
+ print("")
+ print("_L======================L_ --> V")
+ print(" | .____ .___. _____|_______. .______________________|")
+ print(" | |R1_| |R2_| |R3__|_______| |______________________|")
+ print("")
+ print("See also: Lua Action Bounce+Replace Regions")
+ print("")
+ print("")
+--]]
+ end -- print_help()
+
+ local n_paste = 1
+ assert (n_paste > 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_sample ()
+
+ -- make sure we have a loop, and the playhead (edit point) is after it
+ if not loop then
+ print_help();
+ print ("Error: A Loop range must be set.")
+ goto errorout
+ end
+ assert (loop:start () < loop:_end ())
+ if loop:_end () > playhead then
+ print_help();
+ print ("Error: The Playhead (paste point) needs to be after the loop.")
+ goto errorout
+ end
+
+ -- prepare undo operation
+ 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
+ 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 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 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, n_paste, false, 0, 0, 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
+ if not Session:add_stateful_diff_command (playlist:to_statefuldestructible ()):empty () then
+ add_undo = true
+ end
+
+ ::continue::
+ end -- for all routes
+
+ --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, ARDOUR.LocateTransportDisposition.MustStop, ARDOUR.TransportRequestSource.TRS_UI)
+ end
+
+ -- all done, commit the combined Undo Operation
+ if add_undo then
+ -- 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() .. " samples) to playhead @ sample # " .. playhead)
+ ::errorout::
+end -- end of anonymous action script function
+end -- end of script factory
+
+
+function icon (params) return function (ctx, width, height)
+ local x = width * .5
+ local y = height * .5
+ local r = math.min (x, y)
+
+ ctx:set_line_width (1)
+
+ function stroke_outline ()
+ ctx:set_source_rgba (0, 0, 0, 1)
+ ctx:stroke_preserve ()
+ ctx:set_source_rgba (1, 1, 1, 1)
+ ctx:fill ()
+ end
+
+ ctx:rectangle (x - r * .6, y - r * .05, r * .6, r * .3)
+ stroke_outline ()
+
+ ctx:arc (x, y, r * .61, math.pi, 0.2 * math.pi)
+ ctx:arc_negative (x, y, r * .35, 0.2 * math.pi, math.pi);
+ stroke_outline ()
+
+ function arc_arrow (rad, ang)
+ return x - rad * math.sin (ang * 2.0 * math.pi), y - rad * math.cos (ang * 2.0 * math.pi)
+ end
+
+ ctx:move_to (arc_arrow (r * .36, .72))
+ ctx:line_to (arc_arrow (r * .17, .72))
+ ctx:line_to (arc_arrow (r * .56, .60))
+ ctx:line_to (arc_arrow (r * .75, .72))
+ ctx:line_to (arc_arrow (r * .62, .72))
+
+ ctx:set_source_rgba (0, 0, 0, 1)
+ ctx:stroke_preserve ()
+ ctx:close_path ()
+ ctx:set_source_rgba (1, 1, 1, 1)
+ ctx:fill ()
+end end
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