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index.html
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<!DOCTYPE html>
<html>
<head>
<link rel='stylesheet prefetch' href='https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css'>
<style>
body{
font: 15px helvetica,arial,freesans,clean,sans-serif;
margin: 20px auto;
text-align: center;
}
#waveform{
background: rgba(0,0,0,0.8);
}
button{
background: #eee;
border: 1px solid #ddd;
border-bottom: 4px solid #ccc;
cursor: pointer;
font-size: 20px;
margin-top: 10px;
padding: 10px;
}
button:active{
outline: none;
border-top: 4px solid #eee;
border-bottom: 2px solid #777;
}
button:focus{
outline: none;
}
</style>
</head>
<body>
<h1>Media Session API - wavesurfer.js</h1>
<h4>
<a target="_blank" href="https://github.com/entonbiba/Media-Session-API-wavesurfer-js">Example reference on github.com</a>
</h4>
<div id="waveform"></div>
<button id="loadprev"><i class="fa fa-step-backward"></i> Previous</button>
<button id="backward"><i class="fa fa-backward"></i> Rewind</button>
<button id="playpause"><i class="fa fa-play"></i> PLAY</button>
<button id="stop"><i class="fa fa-stop"></i> STOP</button>
<button id="forward"><i class="fa fa-forward"></i> Forward</button>
<button id="loadnext"><i class="fa fa-step-forward"></i> Next</button>
<h3>Live Output</h3>
<div id="output" class="output">
<div id="content"></div>
<div id="status"></div>
<pre id="log"></pre>
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/wavesurfer.js/1.2.7/wavesurfer.min.js'></script>
<script>
console.log(navigator.mediaSession);
var ChromeSamples = {
log: function () {
var line = Array.prototype.slice.call(arguments).map(function (argument) {
return typeof argument === 'string' ? argument : JSON.stringify(argument);
}).join(' ');
document.querySelector('#log').textContent += line + '\n';
},
clearLog: function () {
document.querySelector('#log').textContent = '';
},
setStatus: function (status) {
document.querySelector('#status').textContent = status;
},
setContent: function (newContent) {
var content = document.querySelector('#content');
while (content.hasChildNodes()) {
if (window.CP.shouldStopExecution(1)) {
break;
}
content.removeChild(content.lastChild);
}
window.CP.exitedLoop(1);
content.appendChild(newContent);
}
};
if (!('mediaSession' in navigator)) {
ChromeSamples.setStatus('The Media Session API is not yet available. Try Chrome for Android.');
} else {
ChromeSamples.setStatus('yay it works');
}
navigator.mediaSession = navigator.mediaSession || {};
navigator.mediaSession.setActionHandler = navigator.mediaSession.setActionHandler || function () {
};
window.MediaMetadata = window.MediaMetadata || function () {
};
$(window).resize(function() {
wavesurfer.empty();
wavesurfer.drawBuffer();
});
var wavesurfer = WaveSurfer.create({
container: '#waveform',
waveColor: '#D2EDD4',
progressColor: '#46B54D',
minPxPerSec: 1
});
var playlist = getAwesomePlaylist();
var index = 0;
wavesurfer.load(playlist[index].src);
function playAudio() {
wavesurfer.playPause();
updateMetadata();
}
$('body').on('click', '#playpause', function () {
playAudio();
});
navigator.mediaSession.setActionHandler('play', function () {
wavesurfer.play();
});
navigator.mediaSession.setActionHandler('pause', function () {
wavesurfer.playPause();
});
wavesurfer.on('play', function () {
$('#playpause').html('<i class="fa fa-pause"></i> Pause');
});
wavesurfer.on('pause', function () {
$('#playpause').html('<i class="fa fa-play"></i> Play');
});
function stopAudio() {
wavesurfer.stop();
}
$('body').on('click', '#stop', function () {
stopAudio();
});
navigator.mediaSession.setActionHandler('stop', function () {
stopAudio();
});
wavesurfer.on('stop', function () {
$('#playpause').html('<i class="fa fa-play"></i> Play');
});
function loadprev() {
ChromeSamples.log('> User clicked "Previous Track" icon.');
index = (index - 1 + playlist.length) % playlist.length;
wavesurfer.load(playlist[index].src);
}
$('body').on('click', '#loadprev', function () {
loadprev();
});
navigator.mediaSession.setActionHandler('previoustrack', function () {
loadprev();
});
function loadnext() {
ChromeSamples.log('> User clicked "Next Track" icon.');
index = (index + 1) % playlist.length;
wavesurfer.load(playlist[index].src);
}
$('body').on('click', '#loadnext', function () {
loadnext();
});
navigator.mediaSession.setActionHandler('nexttrack', function () {
loadnext();
});
$('body').on('click', '#backward', function () {
wavesurfer.skipBackward();
});
navigator.mediaSession.setActionHandler('seekbackward', function () {
wavesurfer.skipBackward();
});
$('body').on('click', '#forward', function () {
wavesurfer.skipForward();
});
navigator.mediaSession.setActionHandler('seekforward', function () {
wavesurfer.skipForward();
});
function updateMetadata() {
var track = playlist[index];
if (wavesurfer.isPlaying()) {
ChromeSamples.log('Playing "' + track.title + '" track...');
} else {
ChromeSamples.log('Pausing "' + track.title + '" track...');
}
navigator.mediaSession.metadata = new MediaMetadata({
title: track.title,
artist: track.artist,
album: track.album,
artwork: track.artwork
});
}
function getAwesomePlaylist() {
var BASE_URL = 'https://storage.googleapis.com/media-session/';
return [
{
src: BASE_URL + 'sintel/snow-fight.mp3',
title: 'Snow Fight',
artist: 'Jan Morgenstern',
album: 'Sintel',
artwork: [
{
src: BASE_URL + 'sintel/artwork-96.png',
sizes: '96x96',
type: 'image/png'
},
{
src: BASE_URL + 'sintel/artwork-128.png',
sizes: '128x128',
type: 'image/png'
},
{
src: BASE_URL + 'sintel/artwork-192.png',
sizes: '192x192',
type: 'image/png'
},
{
src: BASE_URL + 'sintel/artwork-256.png',
sizes: '256x256',
type: 'image/png'
},
{
src: BASE_URL + 'sintel/artwork-384.png',
sizes: '384x384',
type: 'image/png'
},
{
src: BASE_URL + 'sintel/artwork-512.png',
sizes: '512x512',
type: 'image/png'
}
]
},
{
src: BASE_URL + 'big-buck-bunny/prelude.mp3',
title: 'Prelude',
artist: 'Jan Morgenstern',
album: 'Big Buck Bunny',
artwork: [
{
src: BASE_URL + 'big-buck-bunny/artwork-96.png',
sizes: '96x96',
type: 'image/png'
},
{
src: BASE_URL + 'big-buck-bunny/artwork-128.png',
sizes: '128x128',
type: 'image/png'
},
{
src: BASE_URL + 'big-buck-bunny/artwork-192.png',
sizes: '192x192',
type: 'image/png'
},
{
src: BASE_URL + 'big-buck-bunny/artwork-256.png',
sizes: '256x256',
type: 'image/png'
},
{
src: BASE_URL + 'big-buck-bunny/artwork-384.png',
sizes: '384x384',
type: 'image/png'
},
{
src: BASE_URL + 'big-buck-bunny/artwork-512.png',
sizes: '512x512',
type: 'image/png'
}
]
},
{
src: BASE_URL + 'elephants-dream/the-wires.mp3',
title: 'The Wires',
artist: 'Jan Morgenstern',
album: 'Elephants Dream',
artwork: [
{
src: BASE_URL + 'elephants-dream/artwork-96.png',
sizes: '96x96',
type: 'image/png'
},
{
src: BASE_URL + 'elephants-dream/artwork-128.png',
sizes: '128x128',
type: 'image/png'
},
{
src: BASE_URL + 'elephants-dream/artwork-192.png',
sizes: '192x192',
type: 'image/png'
},
{
src: BASE_URL + 'elephants-dream/artwork-256.png',
sizes: '256x256',
type: 'image/png'
},
{
src: BASE_URL + 'elephants-dream/artwork-384.png',
sizes: '384x384',
type: 'image/png'
},
{
src: BASE_URL + 'elephants-dream/artwork-512.png',
sizes: '512x512',
type: 'image/png'
}
]
},
{
src: BASE_URL + 'caminandes/original-score.mp3',
title: 'Original Score',
artist: 'Jan Morgenstern',
album: 'Caminandes 2: Gran Dillama',
artwork: [
{
src: BASE_URL + 'caminandes/artwork-96.png',
sizes: '96x96',
type: 'image/png'
},
{
src: BASE_URL + 'caminandes/artwork-128.png',
sizes: '128x128',
type: 'image/png'
},
{
src: BASE_URL + 'caminandes/artwork-192.png',
sizes: '192x192',
type: 'image/png'
},
{
src: BASE_URL + 'caminandes/artwork-256.png',
sizes: '256x256',
type: 'image/png'
},
{
src: BASE_URL + 'caminandes/artwork-384.png',
sizes: '384x384',
type: 'image/png'
},
{
src: BASE_URL + 'caminandes/artwork-512.png',
sizes: '512x512',
type: 'image/png'
}
]
}
];
}
</script>
</body>
</html>