ardour { ["type"] = "EditorAction", name = "Send Raw MIDI from File", license = "MIT", author = "Ardour Team", description = [[Read raw binary midi (.syx) from file and send it to a control port]] } function factory () return function () function portlist () local rv = {} local a = Session:engine() local _, t = a:get_ports (ARDOUR.DataType("midi"), ARDOUR.PortList()) for p in t[2]:iter() do local amp = p:to_asyncmidiport () if amp:isnil() or not amp:sends_output() then goto continue end rv[amp:name()] = amp print (amp:name(), amp:sends_output()) ::continue:: end return rv end local dialog_options = { { type = "file", key = "file", title = "Select .syx MIDI file" }, { type = "dropdown", key = "port", title = "Target Port", values = portlist () } } local rv = LuaDialog.Dialog ("Select Taget", dialog_options):run () dialog_options = nil -- drop references (ports, shared ptr) collectgarbage () -- and release the references immediately if not rv then return end -- user cancelled local f = io.open (rv["file"], "rb") if not f then LuaDialog.Message ("Raw MIDI Tx", "File Not Found", LuaDialog.MessageType.Error, LuaDialog.ButtonType.Close):run () goto out end do -- scope for 'local' local size = f:seek("end") -- determine file size f:seek("set", 0) if size > 1048576 then local ok = LuaDialog.Message ("Raw MIDI Tx", string.format ("File is larger than 1MB.\nFile-size = %.1f kB\n\nContinue?", size / 1024), LuaDialog.MessageType.Question, LuaDialog.ButtonType.Yes_No):run () if ok ~= LuaDialog.Response.Yes then f:close () goto out end end end do -- scope for 'local' local midi_byte_count = 0 local total_read = 0 local message_count = 0 local long_message = false local async_midi_port = rv["port"] -- reference to port local parser = ARDOUR.RawMidiParser () -- construct a MIDI parser while true do -- read file in 64byte chunks local bytes = f:read (64) if not bytes then break end total_read = total_read + #bytes -- parse MIDI data byte-by-byte for i = 1, #bytes do if parser:process_byte (bytes:byte (i)) then if parser:buffer_size () > 255 then long_message = true print ("WARNING -- single large message > 255, bytes: ", parser:buffer_size ()) end -- parsed complete normalized MIDI message, send it async_midi_port:write (parser:midi_buffer (), parser:buffer_size (), 0) -- Physical MIDI is sent at 31.25kBaud. -- Every message is sent as 10bit message on the wire, -- so every MIDI byte needs 320usec. ARDOUR.LuaAPI.usleep (400 * parser:buffer_size ()) -- count msgs and valid bytes sent midi_byte_count = midi_byte_count + parser:buffer_size () message_count = message_count + 1 if 0 == message_count % 50 then -- print() wakes up the GUI, prevent stalling the event loop print ("Sent", message_count, "messages, bytes so far: ", midi_byte_count) end end end end f:close () print ("Sent", message_count, "messages, total bytes: ", midi_byte_count, "/", total_read) if long_message then LuaDialog.Message ("Raw MIDI Tx", "Dataset contained messages longer than 127 bytes. Which may or may not have been transmitted successfully.", LuaDialog.MessageType.Warning, LuaDialog.ButtonType.Close):run () end end ::out:: rv = nil collectgarbage () end end