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..._Set MIDI send channel of selected tracks to channel of existing MIDI events in track.lua
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| --[[ | ||
| * ReaScript Name: js_Set MIDI send channel of selected tracks to channel of existing MIDI events in track.lua | ||
| * Description: Sets MIDI send channel of selected tracks to channel of existing MIDI events in track. | ||
| * Particularly useful when opening large MIDI files, to ensure that each track's MIDI is 1) sent to a | ||
| * single channel, and 2) sent to a different channel than other tracks' MIDI. | ||
| * | ||
| * If the existing MIDI events in the track use more than one channel, the track's send channel | ||
| * will be set to the channel of the first event in the track. | ||
| * | ||
| * The script starts with a dialog box in which the user can select whether to remove audio sends | ||
| * from the selected tracks, which makes the routing matrix easier to read. | ||
| * | ||
| * HINT: The following two scripts are useful for setting up the track names of MIDI files: | ||
| * "X-Raym_Rename tracks with first VSTi and its preset name.lua" | ||
| * "spk77_Rename tracks after first program change (for General MIDI).eel" | ||
| * Instructions: | ||
| * Screenshot: | ||
| * Notes: | ||
| * Category: | ||
| * Author: juliansader | ||
| * Licence: GPL v3 | ||
| * Forum Thread: | ||
| * Forum Thread URL: http://forum.cockos.com/showthread.php?t=176878, http://forum.cockos.com/showthread.php?t=178256 | ||
| * Version: 1.0 | ||
| * REAPER: 5.20 | ||
| * Extensions: | ||
| ]] | ||
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| --[[ | ||
| Changelog: | ||
| * v1.0 (2016-07-15) | ||
| + Initial Release | ||
| ]] | ||
|
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| -- USER AREA | ||
| -- Settings that the user can customize | ||
|
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| -- End of USER AREA | ||
|
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| ---------------------------------------- | ||
| function setTrackChannel(track, channel) | ||
| -- WARNING: This function uses channel numbers 1-16, NOT 0-15, since REAPER's own functions for | ||
| -- setting track channels use this range. | ||
|
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| -- Note: | ||
| -- MIDI hardware cannot be accessed via GetTrackNumSends(selTrack, 1)! | ||
| -- 1) Do MIDI hardware output not count as "hardware outputs"? | ||
| -- 2) Does REAPER only allow a single MIDI hardware output? | ||
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| if type(channel) ~= "number" or channel%1 ~= 0 or channel < 1 or channel > 16 then return end | ||
|
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| -- Iterate through all internal track sends | ||
| for sendIndex = 0, reaper.GetTrackNumSends(track, 0) - 1 do | ||
| MIDIflags = reaper.GetTrackSendInfo_Value(track, 0, sendIndex, "I_MIDIFLAGS") | ||
| -- I_MIDIFLAGS : returns int *, low 5 bits=source channel 0=all, 1-16, | ||
| -- next 5 bits=dest channel, 0=orig, 1-16=chan. | ||
| -- The following sets orig (bits 1-5) to "all" and inserts channel into bits 6-10. | ||
| -- 0xFFFFFC00 = b1111 1111 1111 1111 1111 1100 0000 0000 | ||
| MIDIflags = (MIDIflags & 0xFFFFFC00) | ||
| MIDIflags = MIDIflags | (channel << 5) | ||
| -- SetTrackSendInfo_Value(MediaTrack tr, int category, int sendidx, "parmname", newvalue) | ||
| -- category is <0 for receives, 0=sends, >0 for hardware outputs | ||
| reaper.SetTrackSendInfo_Value(track, 0, sendIndex, "I_MIDIFLAGS", MIDIflags) | ||
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| -- Remove audio sends (I_SRCCHAN : -1 for none) | ||
| if removeAudio == "y" or removeAudio == "Y" then | ||
| reaper.SetTrackSendInfo_Value(track, 0, sendIndex, "I_SRCCHAN", -1) | ||
| reaper.SetMediaTrackInfo_Value(track, "B_MAINSEND", 0) | ||
| end | ||
| end | ||
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| -- Set MIDI hardware output channel | ||
| MIDIflags = reaper.GetMediaTrackInfo_Value(track, "I_MIDIHWOUT") | ||
| -- I_MIDIHWOUT : int * : track midi hardware output index (<0 for disabled, | ||
| -- low 5 bits are which channels (0=all, 1-16), | ||
| -- next 5 bits are output device index (0-31)) | ||
| -- 0xFFFFFFE0 = b1111 1111 1111 1111 1111 1111 1110 0000 | ||
| MIDIflags = MIDIflags & 4294967264 | ||
| MIDIflags = MIDIflags | channel | ||
| reaper.SetMediaTrackInfo_Value(track, "I_MIDIHWOUT", MIDIflags) | ||
|
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| end -- function setTrackChannel | ||
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| ----------------------------------------------------------------------------- | ||
| -- Here the code execution starts | ||
| ----------------------------------------------------------------------------- | ||
| -- function main() | ||
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| -- Is there anything to do? | ||
| if reaper.CountSelectedTracks(0) == 0 | ||
| then return(0) | ||
| end | ||
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| -------------------------- | ||
| -- Get user inputs | ||
| -------------------------- | ||
|
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| -- Repeat until we get usable inputs | ||
| repeat | ||
| OKorCancel, removeAudio = reaper.GetUserInputs("Set MIDI send channels", | ||
| 1, | ||
| "Remove audio sends? (y/n)", | ||
| "y") | ||
| until OKorCancel == false or (OKorCancel == true and (removeAudio == "y" or removeAudio == "Y" or removeAudio == "n" or removeAudio == "N")) | ||
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| if OKorCancel == false then | ||
| return(0) | ||
| end | ||
|
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| ------------------------------------------------------ | ||
| -- Now find MIDI events inside track | ||
| ------------------------------------------------------ | ||
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| -- Iterate through all selected tracks | ||
| for trackIndex = 0, reaper.CountSelectedTracks(0) - 1 do | ||
| curTrack = reaper.GetSelectedTrack(0, trackIndex) | ||
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| -- Iterate through all items within the track to find MIDI events | ||
| for itemIndex = 0, reaper.CountTrackMediaItems(curTrack) - 1 do | ||
| curItem = reaper.GetTrackMediaItem(curTrack, itemIndex) | ||
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| -- Iterate through all takes within item | ||
| for takeIndex = 0, reaper.CountTakes(curItem) - 1 do | ||
| curTake = reaper.GetTake(curItem, takeIndex) | ||
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| if reaper.TakeIsMIDI(curTake) then | ||
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| -- Iterate through all events within take until one with usable channel info is found | ||
| eventIndex = 0 | ||
| repeat | ||
| returnOK, _, _, _, msg = reaper.MIDI_GetEvt(curTake, eventIndex, true, true, 0, "") | ||
| eventIndex = eventIndex + 1 | ||
| until returnOK == false or (returnOK == true and type(msg) == "string" and msg ~= "") | ||
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| if returnOK == true then | ||
| -- REAPER's functions for track channels use channel range 1-16, NOT 0-15, therefore add 1 | ||
| setTrackChannel(curTrack, 1 + ((tonumber(string.byte(msg:sub(1,1))))&15)) | ||
| goto gotChannelForTrack | ||
| end | ||
| end | ||
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| end -- for takeIndex | ||
| end -- for itemIndex | ||
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| ::gotChannelForTrack:: | ||
| end -- for trackIndex |