Annotate CC-to-Automation Lua-script and fix start/pos offset.
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@ -5,23 +5,32 @@ ardour { ["type"] = "EditorAction", name = "MIDI CC to Plugin Automation",
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}
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function factory () return function ()
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-- find target parameters
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-- find possible target parameters, collect them in a nested table
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-- [track-name] -> [plugin-name] -> [parameters]
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-- to allow selection in a dropdown menu
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local targets = {}
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local have_entries = false
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for r in Session:get_routes():iter() do -- for every track/bus
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for r in Session:get_routes ():iter () do -- for every track/bus
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if r:is_monitor () or r:is_auditioner () then goto nextroute end -- skip special routes
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local i = 0
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while 1 do -- iterate over all plugins on the route
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while true do -- iterate over all plugins on the route
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local proc = r:nth_plugin (i)
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if proc:isnil () then break end
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local plug = proc:to_insert ():plugin (0)
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local n = 0
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local plug = proc:to_insert ():plugin (0) -- we know it's a plugin-insert (we asked for nth_plugin)
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local n = 0 -- count control-ports
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for j = 0, plug:parameter_count () - 1 do -- iterate over all plugin parameters
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if plug:parameter_is_control(j) then
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if plug:parameter_is_input(j) then
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local nn = n
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if plug:parameter_is_control (j) then
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local label = plug:parameter_label (j)
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if plug:parameter_is_input (j) and label ~= "hidden" and label:sub (1,1) ~= "#" then
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local nn = n --local scope for return value function
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-- create table parents only if needed (if there's at least one parameter)
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if not targets [r:name ()] then targets [r:name ()] = {} end
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-- TODO handle ambiguity if there are 2 plugins with the same name on the same track
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if not targets [r:name ()][proc:display_name ()] then targets [r:name ()][proc:display_name ()] = {} end
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targets [r:name ()][proc:display_name ()][plug:parameter_label(j)] = function () return {["p"] = proc, ["n"] = nn} end
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-- we need 2 return values: the plugin-instance and the parameter-id, so we use a table (associative array)
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-- however, we cannot directly use a table: the dropdown menu would expand it as another sub-menu.
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-- so we produce a function that will return the table.
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targets [r:name ()][proc:display_name ()][label] = function () return {["p"] = proc, ["n"] = nn} end
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have_entries = true
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end
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n = n + 1
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@ -29,11 +38,13 @@ function factory () return function ()
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end
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i = i + 1
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end
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::nextroute::
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end
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-- bail out if there are no parameters
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if not have_entries then
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LuaDialog.Message ("CC to Plugin Automation", "No Plugins found", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close):run()
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LuaDialog.Message ("CC to Plugin Automation", "No Plugins found", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close):run ()
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targets = nil
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collectgarbage ()
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return
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end
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@ -46,30 +57,30 @@ function factory () return function ()
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{ type = "heading", title = "Target Track and Plugin", align = "left"},
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{ type = "dropdown", key = "param", title = "Target Parameter", values = targets }
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}
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local od = LuaDialog.Dialog ("Select Taget", dialog_options)
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local rv = od:run()
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local rv = LuaDialog.Dialog ("Select Taget", dialog_options):run ()
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if not rv then
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od = nil collectgarbage ()
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return
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end
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targets = nil -- drop references (the table holds shared-pointer references to all plugins)
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collectgarbage () -- and release the references immediately
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if not rv then return end -- user cancelled
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-- parse user response
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local midi_channel = rv["channel"] - 1
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assert (type (rv["param"]) == "function")
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local midi_channel = rv["channel"] - 1 -- MIDI channel 0..15
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local cc_param = rv["ccparam"]
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local pp = rv["param"]()
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local pp = rv["param"]() -- evaluate function, retrieve table {["p"] = proc, ["n"] = nn}
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local al, _, pd = ARDOUR.LuaAPI.plugin_automation (pp["p"], pp["n"])
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od = nil collectgarbage ()
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assert (al)
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rv = nil -- drop references
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assert (not al:isnil ())
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assert (midi_channel >= 0 and midi_channel < 16)
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assert (cc_param >= 0 and cc_param < 128)
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-- all systems go
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local add_undo = false
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Session:begin_reversible_command ("CC to Automation")
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local before = al:get_state()
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al:clear_list ()
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local before = al:get_state () -- save previous state (for undo)
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al:clear_list () -- clear target automation-list
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-- for all selected MIDI regions
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local sel = Editor:get_selection ()
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@ -77,14 +88,21 @@ function factory () return function ()
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local mr = r:to_midiregion ()
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if mr:isnil () then goto next end
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local bfc = ARDOUR.DoubleBeatsFramesConverter (Session:tempo_map (), r:position ())
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-- get list of MIDI-CC events for the given channel and parameter
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local ec = mr:control (Evoral.Parameter (ARDOUR.AutomationType.MidiCCAutomation, midi_channel, cc_param), false)
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if ec:isnil () then goto next end
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if ec:list ():events ():size() == 0 then goto next end
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if ec:list ():events ():size () == 0 then goto next end
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-- MIDI events are timestamped in "bar-beat" units, we need to convert those
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-- using the tempo-map, relative to the region-start
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local bfc = ARDOUR.DoubleBeatsFramesConverter (Session:tempo_map (), r:start ())
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-- iterate over CC-events
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for av in ec:list ():events ():iter () do
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-- re-scale event to target range
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local val = pd.lower + (pd.upper - pd.lower) * av.value / 127
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al:add (bfc:to (av.when), val, false, true)
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-- and add it to the target-parameter automation-list
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al:add (r:position () - r:start () + bfc:to (av.when), val, false, true)
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add_undo = true
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end
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::next::
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@ -92,19 +110,18 @@ function factory () return function ()
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-- save undo
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if add_undo then
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local after = al:get_state()
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Session:add_command (al:memento_command(before, after))
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local after = al:get_state ()
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Session:add_command (al:memento_command (before, after))
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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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LuaDialog.Message ("CC to Plugin Automation", "No data was converted. Was a MIDI-region selected?", LuaDialog.MessageType.Info, LuaDialog.ButtonType.Close):run()
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collectgarbage ()
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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 ()
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end
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collectgarbage ()
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end end
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function icon (params) return function (ctx, width, height, fg)
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local txt = Cairo.PangoLayout (ctx, "ArdourMono ".. math.ceil(width * .45) .. "px")
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local txt = Cairo.PangoLayout (ctx, "ArdourMono ".. math.ceil (width * .45) .. "px")
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txt:set_text ("CC\nPA")
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local tw, th = txt:get_pixel_size ()
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ctx:set_source_rgba (ARDOUR.LuaAPI.color_to_rgba (fg))
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