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index.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Virtual Theremin</title>
<script src="bower_components/jquery/dist/jquery.min.js"></script>
<script src="bower_components/tracking/build/tracking-min.js"></script>
<script src="js/MIDIUtils.js"></script>
<link rel="stylesheet" type="text/css" href="bower_components/normalize-css/normalize.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<!-- <div class="demo-title">
<p><a href="http://trackingjs.com" target="_parent">tracking.js</a> － choose the colors you want to detect through the controls on the right</p>
</div> -->
<div id="container" class="container">
<div class="content">
<header id="header" class="header">
<h1 id="title" class="title"> Virtual Theremin </h1>
</header>
<div id="sounds" class="sounds">
<div class="row">
<div class="col-md-3">
<input type="submit" id="sine" class="btn btn-sound" data-sound="sine" value="Sonido senoidal" onclick="setSound('sine');" />
</div>
<div class="col-md-3">
<input type="submit" id="square" class="btn btn-sound" data-sound="square" value="Sonido cuadrado" onclick="setSound('square');" />
</div>
<div class="col-md-3">
<input type="submit" id="sawtooth" class="btn btn-sound" data-sound="sawtooth" value="Sonido sierra" onclick="setSound('sawtooth');" />
</div>
<div class="col-md-3">
<input type="submit" id="triangle" class="btn btn-sound" data-sound="triangle" value="Sonido triangular" onclick="setSound('triangle');" />
</div>
</div>
</div>
<div class="row indicators">
<div class="col-md-1">
<img id="volume-png" src="img/volume.png" alt="Volume icon"/>
</div>
<div class="col-md-5">
<h2 id="volume"></h2>
</div>
<div class="col-md-5">
<h2 id="note" class="pull-right"></h2>
</div>
<div class="col-md-1">
<img id="pitch-png" src="img/pitch.png" alt="Pitch icon"/>
</div>
</div>
<div class="row hands">
<div class="col-md-6">
<img id="left-png" src="img/left.png" alt="Left hand"/>
</div>
<div class="col-md-6">
<img id="right-png" src="img/right.png" alt="Right hand"/>
</div>
</div>
<div class="row record-container">
<div class="col-lg-2 col-md-2 col-xs-3">
<input type="submit" id="record" class="btn btn-sound pull-left btn-record" data-sound="record" value="" onclick="record(this);" />
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="center-block">
<video id="video" width="1024" height="768" preload autoplay loop muted controls></video>
<canvas id="canvas" width="1024" height="768"></canvas>
</div>
</div>
</div>
</div>
<footer id="footer">
<p>© Amaia Eskisabel, Jorge Yagüe </p>
<!-- <h2>Recordings</h2>
<ul id="recordingslist"></ul> -->
</footer>
</div>
<!-- <button id="play-sound" onclick="start();">Play sound</button>
<button id="stop-sound" onclick="stop();">Stop sound</button>
<h2 id="note"></h2>
<h2 id="volume"></h2> -->
<script>
// Frecuencia del sonido
var maxFreq = 3000;
var minFreq = 65;
var maxVol = 1;
// Web Audio API
var audioCtx = new AudioContext();
var oscillator = audioCtx.createOscillator();
var gainNode = audioCtx.createGain();
oscillator.connect(gainNode);
gainNode.connect(audioCtx.destination);
oscillator.type = 'square'; // sine, square, sawtooth, triangle, custom
oscillator.frequency.value = minFreq;
oscillator.start();
setVolume(0);
var chunks = [];
var dest = audioCtx.createMediaStreamDestination();
var mediaRecorder = new MediaRecorder(dest.stream);
oscillator.connect(dest);
var stopped = true;
window.onload = function() {
var video = document.getElementById('video');
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var isTouching = false;
var touchTimeout;
var tracker = new tracking.ColorTracker(['cyan', 'yellow']);
tracking.track('#video', tracker, {
camera: true
});
tracker.on('track', function(event) {
context.clearRect(0, 0, canvas.width, canvas.height);
if (event.data.length === 0) {
// No targets were detected in this frame.
stop();
} else {
// Plots the detected targets here.
start();
event.data.forEach(function(rect) { // Eventos de detección
var vol = reverse(rect.y / canvas.height, maxVol, 0); // Volumen actual
var freq = reverse(rect.y / canvas.height * maxFreq, maxFreq, minFreq); // Frecuencia actual
checkTouching('sine', rect);
checkTouching('square', rect);
checkTouching('sawtooth', rect);
checkTouching('triangle', rect);
// checkTouching('record', rect);
if (rect.color === 'cyan') {
$('#left-png').hide('slow');
setVolume(vol);
}
if (rect.color === 'yellow') {
$('#right-png').hide('slow');
setFrequency(freq);
}
// Rectángulo alrededor de la detección
context.strokeStyle = rect.color;
context.strokeRect(rect.x, rect.y, rect.width, rect.height);
});
}
function checkTouching(button, rect) {
var realX = reverse(
rect.x + $('#canvas').offset().left,
$('#canvas').width(),
$('#canvas').offset().left
) + $('#canvas').offset().left;
var realY = rect.y + $('#canvas').offset().top;
var canvasXo = $('#' + button).offset().left;
var canvasYo = $('#' + button).offset().top;
var canvasXe = canvasXo + $('#' + button).width();
var canvasYe = canvasYo + $('#' + button).height();
// console.log('istouching ' + isTouching)
if (realX > canvasXo && realX < canvasXe && realY > canvasYo && realY < canvasYe) {
$('#' + button).css('background', 'red');
if (!isTouching) {
// console.log('touching')
isTouching = true;
// touchTimeout = setTimeout(function() {
setSound(button);
// }, 2000);
}
} else {
// console.log('not touching')
isTouching = false;
// clearTimeout(touchTimeout);
$('#' + button).css('background', '#2e8ece');
}
}
});
};
function frequencyToNote(freq) {
return MIDIUtils.noteNumberToName(MIDIUtils.frequencyToNoteNumber(freq));
}
// Invertir valores, por las coordenadas
function reverse(v, max, min) {
return (max + min) - v;
}
function setVolume(vol) {
gainNode.gain.value = vol;
$('#volume').text(Number(vol * 100).toFixed() + "%");
}
function setFrequency(freq) {
oscillator.frequency.value = freq;
$('#note').text(frequencyToNote(freq));
}
function start() {
setVolume(0.1);
}
function stop() {
setVolume(0);
}
function setSound(waveForm) {
oscillator.type = waveForm;
console.log('set sound' + waveForm);
}
// Recorder
var isRecording = false;
function record(button) {
if (isRecording) {
stopRecording(button);
} else {
startRecording(button);
}
}
function startRecording(button) {
console.log('Recording...')
isRecording = true;
mediaRecorder.start();
}
function stopRecording(button) {
console.log('Stop')
mediaRecorder.stop();
isRecording = false;
// // create WAV download link using audio data blob
// createDownloadLink();
}
mediaRecorder.ondataavailable = function(evt) {
// push each chunk (blobs) in an array
chunks.push(evt.data);
};
mediaRecorder.onstop = function(evt) {
// Make blob out of our blobs, and open it.
var blob = new Blob(chunks, { 'type' : 'audio/ogg; codecs=opus' });
// window.location.href = URL.createObjectURL(blob);
createDownloadLink(blob);
};
function createDownloadLink(blob) {
console.log('Creating link')
stop();
var url = URL.createObjectURL(blob);
if (confirm('Esta opción todavía no funciona correctamente. Desea intentar la descarga de música igualmente?')) {
// window.location.href = URL.createObjectURL(blob);
window.open(url, '_blank');
} else {
}
// var li = document.createElement('li');
// var au = document.createElement('audio');
// var hf = document.createElement('a');
//
// au.controls = true;
// au.src = url;
// hf.href = url;
// hf.download = new Date().toISOString() + '.wav';
// hf.innerHTML = hf.download;
// li.appendChild(au);
// li.appendChild(hf);
// recordingslist.appendChild(li);
}
</script>
</body>
</html>