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-- @name Render tracks as MIDI Output (obeying time selection) |
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-- @author Mads Thines Coello ([email protected]) |
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-- @version 0.1.0 |
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function saveSelectedTracks() |
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local selectedTracks = {} |
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for i = 0, reaper.CountSelectedTracks(0) - 1 do |
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local selectedTrack = reaper.GetSelectedTrack(0, i) |
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table.insert(selectedTracks, selectedTrack) |
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end |
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return selectedTracks |
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end |
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function setTracksAsSelected(tracks) |
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-- Unselect all tracks |
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reaper.Main_OnCommand(40297, 0) |
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for _, track in ipairs(tracks) do |
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reaper.SetTrackSelected(track, true) |
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end |
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reaper.UpdateArrange() |
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end |
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-- Insert empty MIDI item in the time selection and select it |
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function insertEmptyMIDIItemsInTimeSelection() |
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local startTime, endTime = reaper.GetSet_LoopTimeRange(false, false, 0, 0, false) |
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if startTime == endTime then |
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reaper.MB("Error: No time selection set.", "Error", 0) |
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return |
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end |
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local numSelectedTracks = reaper.CountSelectedTracks(0) |
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if numSelectedTracks == 0 then |
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reaper.MB("Error: No tracks selected.", "Error", 0) |
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return |
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end |
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local newItems = {} |
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-- Loop through selected tracks |
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for i = 0, numSelectedTracks - 1 do |
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local track = reaper.GetSelectedTrack(0, i) |
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-- Insert a new MIDI item within the time selection |
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local newItem = reaper.CreateNewMIDIItemInProj(track, startTime, endTime, false) |
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-- Select the new MIDI item |
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reaper.SetMediaItemSelected(newItem, true) |
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table.insert(newItems, newItem) |
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end |
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return newItems |
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end |
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-- Recursively select child tracks |
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function selectAllChildTracks(track) |
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local numChildTracks = reaper.CountTracks(0) |
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for i = 0, numChildTracks - 1 do |
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local childTrack = reaper.GetTrack(0, i) |
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local parentTrack = reaper.GetParentTrack(childTrack) |
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if parentTrack and parentTrack == track then |
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reaper.SetTrackSelected(childTrack, true) |
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selectAllChildTracks(childTrack) -- Recursively select child tracks of the current child track |
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end |
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end |
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end |
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function clearSelection() |
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-- Unselect all items |
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reaper.Main_OnCommand(40289, 0); |
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-- Unselect all tracks |
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reaper.Main_OnCommand(40297, 0); |
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end |
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function mergeMIDI() |
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-- Item: Set item mix behavior to always mix |
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reaper.Main_OnCommand(40919, 0); |
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-- Item: Implode items across tracks into items on one track |
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reaper.Main_OnCommand(40644, 0); |
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-- Item: Glue items, ignoring time selection |
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reaper.Main_OnCommand(40362, 0); |
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-- Item: Set item mix behavior to project default |
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reaper.Main_OnCommand(40922, 0); |
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end |
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function renderNestedMIDIToTrack(selectedTrack) |
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-- Make sure the selected track is selected |
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reaper.SetTrackSelected(selectedTrack, true) |
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-- Recursively select all child tracks |
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selectAllChildTracks(selectedTrack) |
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-- Create new empty MIDI items for all tracks so we can apply the MIDI to them |
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local newItems = insertEmptyMIDIItemsInTimeSelection(track) |
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-- Apply track/take FX To MIDI items (MIDI Output) |
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reaper.Main_OnCommand(40436, 0); |
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-- Crop to Active Take |
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reaper.Main_OnCommand(40131, 0); |
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-- Merge the MIDI together into the first selected |
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mergeMIDI() |
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-- Rename the merged MIDI item to the name of the Track |
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local selectedItem = reaper.GetSelectedMediaItem(0, 0) |
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local track = reaper.GetMediaItem_Track(selectedItem) |
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local _, trackName = reaper.GetSetMediaTrackInfo_String(track, "P_NAME", "", false) |
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reaper.GetSetMediaItemTakeInfo_String(reaper.GetActiveTake(selectedItem), "P_NAME", trackName, true) |
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-- Clear the selection |
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clearSelection() |
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end |
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-- Run the main function |
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function main() |
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-- Begin a new undo block |
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reaper.Undo_BeginBlock() |
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-- Unselect all items |
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reaper.Main_OnCommand(40289, 0); |
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local numSelectedTracks = reaper.CountSelectedTracks(0) |
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if numSelectedTracks == 0 then |
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reaper.MB("Error: No tracks selected.", "Error", 0) |
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return |
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end |
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-- Save selected tracks for iteration and restoration later |
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local selectedTracks = saveSelectedTracks() |
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-- Iterate over the selected tracks and render them individually to MIDI |
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for _, selectedTrack in ipairs(selectedTracks) do |
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renderNestedMIDIToTrack(selectedTrack); |
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end |
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-- Clear the selection |
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clearSelection() |
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-- Restore the initially selected tracks to the selection |
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setTracksAsSelected(selectedTracks) |
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-- End the undo block without registering any changes |
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reaper.Undo_EndBlock("Render tracks as MIDI Output (obeying time selection)", -1) |
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end |
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-- Disable UI refresh to prevent flickering |
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reaper.PreventUIRefresh(1) |
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main(); |
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-- Enable UI refresh |
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reaper.PreventUIRefresh(-1) |
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reaper.UpdateArrange() |
