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