MidAs3开源项目

//to import the midas3 library
	import ocean.midi.*;
	import ocean.midi.model.*;
	import ocean.midi.controller.*;
	import ocean.midi.event.*;

//variable
        private var _midiFile:MidiFile;

//to open a midi file in AIR environment:


	var fileToOpen = new File();
	var txtFilter = new FileFilter("MIDI", "*.mid;*.midi");
	fileToOpen.browseForOpen("Open", new Array(txtFilter));
	fileToOpen.addEventListener(Event.SELECT, fileSelected);

	function fileSelected(e:Event)
	{
		//istream handles the file opened from disk
		var istream:FileStream = new FileStream();
		istream.open(fileToOpen,FileMode.READ);
		istream.readBytes( cache );
		istream.close();
		
                /* File load into MidiFile instance, this means decodeing. */
                _midiFile = new MidiFile(cache);
                /* Now you can manipulate any data inside midi */
                //........do something....
	}
	
//to save a midi file in AIR:	
	var docsDir = File.documentsDirectory;
	docsDir.browseForSave("Save As");
	docsDir.addEventListener(Event.SELECT, saveData );

	function saveData(e:Event)
	{
		var newFile = e.target ;
		
		var stream = new FileStream();
		stream.open(newFile, FileMode.WRITE);

                /* call .output() method to perform serialization */
		stream.writeBytes(_midiFile.output());

		stream.close();
	}

//to manipulate midi file:
        /* add an empty track or a track with something */
        /* addTrack(track:MidiTrack = null); */
        trackNum = _midiFile.addTrack(track);
 
        /* insert a track after 2nd track */ 
        /* insertTrack(t:int, track:MidiTrack = null):uint */
        trackNum = _midiFile.insertTrack(2, track);
        
        /* look up doc for more methods */

//tp manipulate midi track:
      
      /* Unserializes the incoming stream data to message list. MidiTrack */
      var _track = MidiTrack(stream);

      /* or mostly creates midi event messages list from stream. */
      var _msgList = createList(stream:ByteArray):MessageList 



      /* MessageList simply hosts midi data in array with following extending methods */
      /* needs import ocean.midi.model.*; */      
             //clone():MessageList 
             //new instance with the same identical contents  MessageList 
      
             //input(mt:MidiTrack):void
             //Parse the midi Track, cache as event list in array  MessageList 
             
             //output():MidiTrack 
             //Export event list as midi track. 



      /* use TrackEditor to do advanced manipulating MessageList of MidiTrack */
      /* needs import ocean.midi.controller.*; */
      /* look up doc for more methods */