83 lines
2.2 KiB
HTML
83 lines
2.2 KiB
HTML
<!doctype html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<meta http-equiv="Cache-Control" Content="no-cache">
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<meta http-equiv="Pragma" content="no-cache">
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<meta http-equiv="Expires" content="0">
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<script type="text/javascript" src="lib/MidiBridge.js"></script>
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<script type="text/javascript">
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window.onload = function() {
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var jsmidi = parent.jsmidi;
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var notes = {};
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var events = {};
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var startTime = 0;
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var eventTimeOn = {};
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var eventTimeOff = {};
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for (var key in parent.MIDI.noteToKey) {
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events[key] = [];
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eventTimeOn[key] = 0;
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eventTimeOff[key] = 0;
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}
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parent.writeMIDI = function() {
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var tracks = [];
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for (var key in events) {
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tracks.push(new jsmidi.MidiTrack({ events: events[key] }));
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}
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var song = jsmidi.MidiWriter({ tracks: tracks });
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return "data:audio/mid;base64," + song.b64;
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};
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midiBridge.init({
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connectAllInputsToFirstOutput: true,
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data: function(event) {
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if (!(event.status == 128 || event.status == 144)) return;
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//
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var noteName = event.noteName;
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var now = (new Date()).getTime();
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var id = parseInt(event.data1);
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var velocity = parseInt(event.data2);
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//
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if (event.status == midiBridge.NOTE_ON) {
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console.log(noteName, "on");
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//
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eventTimeOn[id] = now;
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//
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} else {
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console.log(id, noteName, "off")
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if (!startTime) startTime = now;
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if (!eventTimeOn[id]) eventTimeOn[id] = startTime;
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if (!eventTimeOff[id]) eventTimeOff[id] = startTime;
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//
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var begin = now - eventTimeOff[id];
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var end = now - eventTimeOn[id];
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var duration = Math.max(0, begin - end);
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//
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var note = {
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duration: duration,
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channel: 0,
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pitch: id,
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volume: velocity
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};
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//
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events[id].push(jsmidi.MidiEvent.noteOn(note));
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note.duration = end;
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console.log('begin', begin, 'end', end, begin-end);
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events[id].push(jsmidi.MidiEvent.noteOff(note));
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//
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eventTimeOff[id] = now;
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}
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},
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ready: function() {
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if (typeof(MIDI) === "undefined") var MIDI = {};
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MIDI.Plugin = midiBridge;
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if (parent.MIDI && parent.MIDI.Java) {
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parent.MIDI.Java.confirm(MIDI.Plugin);
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}
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}
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});
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};
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</script>
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<body></body>
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</html> |