Create smandrap_Freeze tracks up to first instrument.lua

Freeze/smandrap_Freeze tracks up to first instrument.lua

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+-- @description Freeze tracks up to first instrument
+-- @author smandrap
+-- @version 1.0
+-- @changelog Initial release
+
+local reaper = reaper
+
+local function msg(s)
+  reaper.ShowConsoleMsg(tostring(s))
+  reaper.ShowConsoleMsg('\n')
+end
+
+local function GetSelectedTracks()
+  local sel_tr_cnt = reaper.CountSelectedTracks(0)
+  if sel_tr_cnt == 0 then return end
+
+  local t = {}
+
+  for i = 1, sel_tr_cnt do
+    t[i] = reaper.GetSelectedTrack(0, i - 1)
+  end
+
+  return t
+end
+
+local function GetInstTracks(tracks)
+  local t = {}
+  local cnt = #tracks
+
+  for i = 1, cnt do
+    local inst_idx = reaper.TrackFX_GetInstrument(tracks[i])
+    if inst_idx > -1 then
+      t[#t + 1] = {['track'] = tracks[i], ['inst_idx'] = inst_idx}
+    end
+  end
+
+  if #t == 0 then return end
+  return t
+end
+
+local function CreateTempTracks(tracks)
+  local t = {}
+  local cnt = #tracks
+
+  for i = 1, cnt do
+    reaper.InsertTrackAtIndex(0, false)
+    local buf = reaper.GetTrack(0, 0)
+    t[#t + 1] = buf
+  end
+
+  return t
+end
+
+local function CreateFxBuffer(src_tr, dst_tr)
+  local fx_count = reaper.TrackFX_GetCount(src_tr.track)
+  if fx_count == src_tr.inst_idx + 1 then return end
+
+  for i = fx_count - 1, src_tr.inst_idx + 1, - 1 do
+    reaper.TrackFX_CopyToTrack(src_tr.track, i, dst_tr, 0, true)
+  end
+
+end
+
+local function SelectOnlyTracksWithInstrument(tracks)
+  reaper.SetOnlyTrackSelected(tracks[1].track)
+  local cnt = #tracks
+  if cnt == 1 then return end
+
+  for i = 1, cnt do
+    reaper.SetTrackSelected(tracks[i].track, true)
+  end -- for
+end -- function
+
+local function InsertMediaItemInEmptyTracks(tracks)
+  local cnt = #tracks
+
+  for i = 1, cnt do
+    local item = reaper.GetTrackMediaItem(tracks[i].track, 0)
+    if not item then
+      reaper.CreateNewMIDIItemInProj(tracks[i].track, 0, 1, false)
+    end
+
+  end
+end
+
+local function RestoreFxOnFrozenTrack(src_tr, dst_tr)
+  local fx_count = reaper.TrackFX_GetCount(src_tr)
+
+  for i = fx_count - 1, 0, - 1 do
+    reaper.TrackFX_CopyToTrack(src_tr, i, dst_tr.track, 0, true)
+  end
+
+end
+
+local function main()
+  local sel_tracks = GetSelectedTracks()
+  if not sel_tracks then return end
+
+  local inst_tracks = GetInstTracks(sel_tracks)
+  if not inst_tracks then return end
+
+  local temp_tracks = CreateTempTracks(inst_tracks)
+
+  for i = 1, #inst_tracks do
+    CreateFxBuffer(inst_tracks[i], temp_tracks[i])
+  end
+
+  SelectOnlyTracksWithInstrument(inst_tracks)
+  InsertMediaItemInEmptyTracks(inst_tracks) -- This ensures the track will be freezed even if it has no items
+  reaper.Main_OnCommand(41223, 0) --Freeze tracks
+
+  for i = 1, #inst_tracks do
+    RestoreFxOnFrozenTrack(temp_tracks[i], inst_tracks[i])
+    reaper.DeleteTrack(temp_tracks[i])
+  end
+
+  for i = 1, #sel_tracks do
+    reaper.SetTrackSelected(sel_tracks[i], true)
+  end
+end
+
+
+reaper.PreventUIRefresh(1)
+reaper.Undo_BeginBlock()
+
+main()
+
+reaper.Undo_EndBlock('manup_Freeze tracks up to instrument (ignore non instrument tracks)', 0)
+reaper.UpdateArrange()
+reaper.PreventUIRefresh(-1)