diff options
author | Robin Gareus <robin@gareus.org> | 2020-02-23 20:48:02 +0100 |
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committer | Robin Gareus <robin@gareus.org> | 2020-02-23 20:48:02 +0100 |
commit | 180843f9bd28b191c7404245ba0a121107992511 (patch) | |
tree | c60312dc09f76c2f55ba2383245c427e15c38dea /share/scripts/midi_cc_to_automation.lua | |
parent | bf649cd68ad46c34a656700aa6cb89416d648c64 (diff) |
Also move Lua scripts to share subfolder
Diffstat (limited to 'share/scripts/midi_cc_to_automation.lua')
-rw-r--r-- | share/scripts/midi_cc_to_automation.lua | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/share/scripts/midi_cc_to_automation.lua b/share/scripts/midi_cc_to_automation.lua new file mode 100644 index 0000000000..a1bab91a05 --- /dev/null +++ b/share/scripts/midi_cc_to_automation.lua @@ -0,0 +1,130 @@ +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.DoubleBeatsSamplesConverter (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 (height / 3) .. "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 |