ardour { ["type"] = "EditorAction", name = "MIDI CC to Plugin Automation", license = "MIT", author = "Ardour Team", description = [[Parse a given MIDI control changes (CC) from all selected MIDI regions and convert them into plugin parameter automation]] } function factory () return function () -- find possible target parameters, collect them in a nested table -- [track-name] -> [plugin-name] -> [parameters] -- to allow selection in a dropdown menu local targets = {} local have_entries = false for r in Session:get_routes ():iter () do -- for every track/bus if r:is_monitor () or r:is_auditioner () then goto nextroute end -- skip special routes local i = 0 while true do -- iterate over all plugins on the route local proc = r:nth_plugin (i) if proc:isnil () then break end local plug = proc:to_insert ():plugin (0) -- we know it's a plugin-insert (we asked for nth_plugin) local n = 0 -- count control-ports for j = 0, plug:parameter_count () - 1 do -- iterate over all plugin parameters if plug:parameter_is_control (j) then local label = plug:parameter_label (j) if plug:parameter_is_input (j) and label ~= "hidden" and label:sub (1,1) ~= "#" then local nn = n --local scope for return value function -- create table parents only if needed (if there's at least one parameter) if not targets [r:name ()] then targets [r:name ()] = {} end -- TODO handle ambiguity if there are 2 plugins with the same name on the same track if not targets [r:name ()][proc:display_name ()] then targets [r:name ()][proc:display_name ()] = {} end -- we need 2 return values: the plugin-instance and the parameter-id, so we use a table (associative array) -- however, we cannot directly use a table: the dropdown menu would expand it as another sub-menu. -- so we produce a function that will return the table. targets [r:name ()][proc:display_name ()][label] = function () return {["p"] = proc, ["n"] = nn} end have_entries = true end n = n + 1 end end i = i + 1 end ::nextroute:: end -- bail out if there are no parameters if not have_entries then LuaDialog.Message ("CC to Plugin Automation", "No Plugins found", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close):run () targets = nil collectgarbage () return end -- create a dialog, ask user which MIDI-CC to map and to what parameter local dialog_options = { { type = "heading", title = "MIDI CC Source", align = "left" }, { type = "number", key = "channel", title = "Channel", min = 1, max = 16, step = 1, digits = 0 }, { type = "number", key = "ccparam", title = "CC Parameter", min = 0, max = 127, step = 1, digits = 0 }, { type = "heading", title = "Target Track and Plugin", align = "left"}, { type = "dropdown", key = "param", title = "Target Parameter", values = targets } } local rv = LuaDialog.Dialog ("Select Taget", dialog_options):run () targets = nil -- drop references (the table holds shared-pointer references to all plugins) collectgarbage () -- and release the references immediately if not rv then return end -- user cancelled -- parse user response assert (type (rv["param"]) == "function") local midi_channel = rv["channel"] - 1 -- MIDI channel 0..15 local cc_param = rv["ccparam"] local pp = rv["param"]() -- evaluate function, retrieve table {["p"] = proc, ["n"] = nn} local al, _, pd = ARDOUR.LuaAPI.plugin_automation (pp["p"], pp["n"]) rv = nil -- drop references assert (not al:isnil ()) assert (midi_channel >= 0 and midi_channel < 16) assert (cc_param >= 0 and cc_param < 128) -- all systems go local add_undo = false Session:begin_reversible_command ("CC to Automation") local before = al:get_state () -- save previous state (for undo) al:clear_list () -- clear target automation-list -- for all selected MIDI regions local sel = Editor:get_selection () for r in sel.regions:regionlist ():iter () do local mr = r:to_midiregion () if mr:isnil () then goto next end -- get list of MIDI-CC events for the given channel and parameter local ec = mr:control (Evoral.Parameter (ARDOUR.AutomationType.MidiCCAutomation, midi_channel, cc_param), false) if ec:isnil () then goto next end if ec:list ():events ():size () == 0 then goto next end -- MIDI events are timestamped in "bar-beat" units, we need to convert those -- using the tempo-map, relative to the region-start local bfc = ARDOUR.DoubleBeatsFramesConverter (Session:tempo_map (), r:start ()) -- iterate over CC-events for av in ec:list ():events ():iter () do -- re-scale event to target range local val = pd.lower + (pd.upper - pd.lower) * av.value / 127 -- and add it to the target-parameter automation-list al:add (r:position () - r:start () + bfc:to (av.when), val, false, true) add_undo = true end ::next:: end -- save undo if add_undo then local after = al:get_state () Session:add_command (al:memento_command (before, after)) Session:commit_reversible_command (nil) else Session:abort_reversible_command () LuaDialog.Message ("CC to Plugin Automation", "No data was converted. Was a MIDI-region with CC-automation selected? ", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close):run () end collectgarbage () end end function icon (params) return function (ctx, width, height, fg) local txt = Cairo.PangoLayout (ctx, "ArdourMono ".. math.ceil (width * .45) .. "px") txt:set_text ("CC\nPA") local tw, th = txt:get_pixel_size () ctx:set_source_rgba (ARDOUR.LuaAPI.color_to_rgba (fg)) ctx:move_to (.5 * (width - tw), .5 * (height - th)) txt:show_in_cairo_context (ctx) end end