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cue-events.html
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cue-events.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Peaks.js Demo Page</title>
<style>
body {
font-family: 'Helvetica neue', Helvetica, Arial, sans-serif;
}
#titles, #waveform-container {
margin: 24px auto;
width: 1000px;
}
#zoomview-container, #overview-container {
margin: 0 0 24px 0;
line-height: 0;
-moz-box-shadow: 3px 3px 20px #919191;
-webkit-box-shadow: 3px 3px 20px #919191;
box-shadow: 3px 3px 20px #919191;
}
#zoomview-container {
height: 200px;
}
#overview-container {
height: 85px;
}
#demo-controls {
margin: 0 auto 24px auto;
width: 1000px;
display: flex;
align-items: center;
}
#demo-controls button {
background: #fff;
border: 1px solid #919191;
cursor: pointer;
}
#audio {
flex: 0 0 30%;
}
#controls {
flex: 1;
margin-left: 1em;
}
#seek-time {
width: 4em;
}
.log {
margin: 0 auto 24px auto;
width: 1000px;
}
table {
width: 100%;
}
table th {
text-align: left;
}
table th, table td {
padding: 0.5em;
}
.hide {
display: none;
}
</style>
</head>
<body>
<div id="titles">
<h1>Peaks.js</h1>
<p>
Peaks.js is a JavaScript library that allows you to display and
interaction with audio waveforms in the browser.
</p>
<p>
It was developed by <a href="https://www.bbc.co.uk/rd">BBC R&D</a>
to allow audio editors to make accurate clippings of audio content.
You can read more about the project
<a href="https://waveform.prototyping.bbc.co.uk/">here</a>.
</p>
<h2>Demo pages</h2>
<p>
The following pages demonstrate various configuration options:
</p>
<p>
<a href="index.html">Precomputed Waveform Data</a> |
<a href="webaudio.html">Web Audio API</a> |
<a href="zoomable-waveform.html">Single Zoomable Waveform</a> |
<a href="overview-waveform.html">Single Fixed Waveform</a> |
Cue Events |
<a href="set-source.html">Changing the Media URL</a> |
<a href="multi-channel.html">Multi-Channel Waveform</a> |
<a href="custom-markers.html">Custom Point and Segment Markers</a> |
<a href="external-player.html">External Audio Player</a>
</p>
<h2>Demo: Cue Events</h2>
<p>
This demo shows how to listen for events from the playhead reaching points, or segment edges. <br />
Events in this demo are logged in the browser console.
</p>
</div>
<div id="waveform-container">
<div id="zoomview-container"></div>
<div id="overview-container"></div>
</div>
<div id="demo-controls">
<audio id="audio" controls="controls">
<source src="TOL_6min_720p_download.mp3" type="audio/mpeg">
<source src="TOL_6min_720p_download.ogg" type="audio/ogg">
Your browser does not support the audio element.
</audio>
<div id="controls">
<button data-action="zoom-in">Zoom in</button>
<button data-action="zoom-out">Zoom out</button>
<button data-action="add-segment">Add a Segment at current time</button>
<button data-action="add-point">Add a Point at current time</button>
<button data-action="log-data">Log segments/points</button>
<input type="text" id="seek-time" value="0.0">
<button data-action="seek">Seek</button>
<button data-action="reverse-direction">Reverse direction</button>
<button data-action="destroy">Destroy</button>
</div>
</div>
<div class="log">
<div id="segments" class="hide">
<h2>Segments</h2>
<table>
<thead>
<tr>
<th>ID</th>
<th>Label</th>
<th>Start time</th>
<th>End time</th>
<th></th>
</tr>
</thead>
<tbody>
</tbody>
</table>
</div>
<div id="points" class="hide">
<h2>Points</h2>
<table>
<thead>
<tr>
<th>ID</th>
<th>Label</th>
<th>Time</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
</div>
</div>
<script src="peaks.js"></script>
<script>
(function(Peaks) {
var renderSegments = function(peaks) {
var segmentsContainer = document.getElementById('segments');
var segments = peaks.segments.getSegments();
var html = '';
for (var i = 0; i < segments.length; i++) {
var segment = segments[i];
var row = '<tr>' +
'<td>' + segment.id + '</td>' +
'<td><input data-action="update-segment-label" type="text" value="' + segment.labelText + '" data-id="' + segment.id + '"/></td>' +
'<td><input data-action="update-segment-start-time" type="number" value="' + segment.startTime + '" data-id="' + segment.id + '"/></td>' +
'<td><input data-action="update-segment-end-time" type="number" value="' + segment.endTime + '" data-id="' + segment.id + '"/></td>' +
'<td>' + '<a href="#' + segment.id + '" data-action="play-segment" data-id="' + segment.id + '">Play</a>' + '</td>' +
'<td>' + '<a href="#' + segment.id + '" data-action="remove-segment" data-id="' + segment.id + '">Remove</a>' + '</td>' +
'</tr>';
html += row;
}
segmentsContainer.querySelector('tbody').innerHTML = html;
if (html.length) {
segmentsContainer.classList.remove('hide');
}
document.querySelectorAll('input[data-action="update-segment-start-time"]').forEach(function(inputElement) {
inputElement.addEventListener('input', function(event) {
var element = event.target;
var id = element.getAttribute('data-id');
var segment = peaks.segments.getSegment(id);
if (segment) {
var startTime = parseFloat(element.value);
if (startTime < 0) {
startTime = 0;
element.value = 0;
}
if (startTime >= segment.endTime) {
startTime = segment.endTime - 0.1;
element.value = startTime;
}
segment.update({ startTime: startTime });
}
});
});
document.querySelectorAll('input[data-action="update-segment-end-time"]').forEach(function(inputElement) {
inputElement.addEventListener('input', function(event) {
var element = event.target;
var id = element.getAttribute('data-id');
var segment = peaks.segments.getSegment(id);
if (segment) {
var endTime = parseFloat(element.value);
if (endTime < 0) {
endTime = 0;
element.value = 0;
}
if (endTime <= segment.startTime) {
endTime = segment.startTime + 0.1;
element.value = endTime;
}
segment.update({ endTime: endTime });
}
});
});
document.querySelectorAll('input[data-action="update-segment-label"]').forEach(function(inputElement) {
inputElement.addEventListener('input', function(event) {
var element = event.target;
var id = element.getAttribute('data-id');
var segment = peaks.segments.getSegment(id);
var labelText = element.labelText;
if (segment) {
segment.update({ labelText: labelText });
}
});
});
};
var renderPoints = function(peaks) {
var pointsContainer = document.getElementById('points');
var points = peaks.points.getPoints();
var html = '';
window.pointUpdated = function(i, prop, value) {
var points = peaksInstance.points.getPoints();
var segment = points[i];
point.update({[prop]: value});
};
for (var i = 0; i < points.length; i++) {
var point = points[i];
var row = '<tr>' +
'<td>' + point.id + '</td>' +
'<td><input data-action="update-point-label" type="text" value="' + point.labelText + '" data-id="' + point.id + '"/></td>' +
'<td><input data-action="update-point-time" type="number" value="' + point.time + '" data-id="' + point.id + '"/></td>' +
'<td>' + '<a href="#' + point.id + '" data-action="remove-point" data-id="' + point.id + '">Remove</a>' + '</td>' +
'</tr>';
html += row;
}
pointsContainer.querySelector('tbody').innerHTML = html;
if (html.length) {
pointsContainer.classList.remove('hide');
}
document.querySelectorAll('input[data-action="update-point-time"]').forEach(function(inputElement) {
inputElement.addEventListener('input', function(event) {
var element = event.target;
var id = element.getAttribute('data-id');
var point = peaks.points.getPoint(id);
if (point) {
var time = parseFloat(element.value);
if (time < 0) {
time = 0;
element.value = 0;
}
point.update({ time: time });
}
});
});
document.querySelectorAll('input[data-action="update-point-label"]').forEach(function(inputElement) {
inputElement.addEventListener('input', function(event) {
var element = event.target;
var id = element.getAttribute('data-id');
var point = peaks.points.getPoint(id);
var labelText = element.labelText;
if (point) {
point.update({ labelText: labelText });
}
});
});
};
var options = {
containers: {
zoomview: document.getElementById('zoomview-container'),
overview: document.getElementById('overview-container')
},
mediaElement: document.getElementById('audio'),
dataUri: {
arraybuffer: 'TOL_6min_720p_download.dat',
json: 'TOL_6min_720p_download.json'
},
keyboard: true,
pointMarkerColor: '#006eb0',
showPlayheadTime: true,
emitCueEvents: true
};
Peaks.init(options, function(err, peaksInstance) {
if (err) {
console.error(err.message);
return;
}
console.log("Peaks instance ready");
document.querySelector('[data-action="zoom-in"]').addEventListener('click', function() {
peaksInstance.zoom.zoomIn();
});
document.querySelector('[data-action="zoom-out"]').addEventListener('click', function() {
peaksInstance.zoom.zoomOut();
});
document.querySelector('button[data-action="add-segment"]').addEventListener('click', function() {
peaksInstance.segments.add({
startTime: peaksInstance.player.getCurrentTime(),
endTime: peaksInstance.player.getCurrentTime() + 10,
labelText: "Test segment",
editable: true
});
});
document.querySelector('button[data-action="add-point"]').addEventListener('click', function() {
peaksInstance.points.add({
time: peaksInstance.player.getCurrentTime(),
labelText: "Test point",
editable: true
});
});
document.querySelector('button[data-action="log-data"]').addEventListener('click', function(event) {
renderSegments(peaksInstance);
renderPoints(peaksInstance);
});
document.querySelector('button[data-action="seek"]').addEventListener('click', function(event) {
var time = document.getElementById('seek-time').value;
var seconds = parseFloat(time);
if (!Number.isNaN(seconds)) {
peaksInstance.player.seek(seconds);
}
});
document.querySelector('button[data-action="reverse-direction"]').addEventListener('click', function(event) {
var el = document.querySelector('audio');
try {
el.playbackRate = -el.playbackRate;
}
catch (e) {
console.info('reverse direction not supported');
}
});
document.querySelector('button[data-action="destroy"]').addEventListener('click', function(event) {
peaksInstance.destroy();
});
document.querySelector('body').addEventListener('click', function(event) {
var element = event.target;
var action = element.getAttribute('data-action');
var id = element.getAttribute('data-id');
if (action === 'play-segment') {
var segment = peaksInstance.segments.getSegment(id);
peaksInstance.player.playSegment(segment);
}
else if (action === 'remove-point') {
peaksInstance.points.removeById(id);
}
else if (action === 'remove-segment') {
peaksInstance.segments.removeById(id);
}
});
peaksInstance.segments.add({
startTime: 5.5,
endTime: 7.5,
editable: true,
id: 'testsegment'
});
peaksInstance.points.add({
time: 4.3,
editable: true,
id: 'testpoint'
});
peaksInstance.on('points.enter', function(point) {
console.log('points.enter', point, peaksInstance.player.getCurrentTime())
});
peaksInstance.on('segments.enter', function(segment) {
console.log('segments.enter', segment,peaksInstance.player.getCurrentTime())
});
peaksInstance.on('segments.exit', function(segment) {
console.log('segments.exit', segment, peaksInstance.player.getCurrentTime())
});
});
})(peaks);
</script>
</body>
</html>