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<!DOCTYPE html>
<html>
<!--
csound.js MIDI file player example
Copyright (C) 2013 V Lazzarini
-->
<head>
<title>WebAudio Csound</title>
<style type="text/css">
html, body {
font-family: Monospace;
color: #bf94f7;
background-color: #000055;
}
#console {
font-family: Monospace;
color: #b5b6ff;
background-color: #000000;
font-size: 16px;
width: 805px;
display: flex;
align-items: center;
justify-content: center;
border-style: solid;
padding: 20px 0px;
}
#filebut {
padding: 20px 0px;
}
input[type=file] {
font-family: Monospace;
font-size: 24px;
background-color: #b5b6ff;
color: #000000;
}
H1 {
font-size: 36px;
}
button {
margin: auto;
font-family: Monospace;
width: 805px;
padding: 10px 0px;
font-size: 24px;
background-color: #b5b6ff;
}
</style>
<script type="text/javascript" src="js/csound.js"></script>
<script type="text/javascript">
// called by csound.js
function moduleDidLoad() {
csound.CopyUrlToLocal("sf_GMbank.sf2", "sf_GMbank.sf2", function() {
fcopied = true;
console.log("Ready to load a MIDI file.\n");
});
}
function attachListeners() {
document.getElementById('playButton').
addEventListener('click', togglePlay);
document.getElementById('files').
addEventListener('change', handleFileSelect, false);
}
var fcopied = false;
var count = 0;
function handleMessage(message) {
var element = document.getElementById('console');
element.value += message;
count += 1;
if (count == 1000) {
element.value = ' ';
count = 0;
}
}
var playing = false;
var started = false;
var loaded = false;
function togglePlay() {
if (loaded && fcopied) {
if (!playing) {
if (started) csound.Play();
else {
CsoundObj.CSOUND_AUDIO_CONTEXT.resume();
csound.PlayCsd("gm.csd");
started = true;
}
document.getElementById('playButton').innerText = "Pause";
playing = true;
} else {
csound.Pause()
document.getElementById('playButton').innerText = "Play";
playing = false;
}
}
}
function handleFileSelect(evt) {
if (!loaded) {
var files = evt.target.files;
var f = files[0];
var objectURL = window.URL.createObjectURL(f);
csound.CopyUrlToLocal(objectURL, "midifile.mid", function() {
loaded = true;
console.log("Ready to play. \n");
});
} else {
csound.UpdateStatus("to load a new file, first refresh page!")
}
}
</script>
</head>
<body>
<H1> MIDI File Player </H1>
<div id="filebut">
<input type="file" id="files" name="file" />
</div>
<textarea class="console" cols="65" rows="20" id="console">
Csound: not loaded</textarea>
<p>
<button id="playButton">Play</button>
</p>
</body>
</html>
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